nghttp2 2019-11-15 (cc05c5fe)

Code extracted from:

    https://github.com/nghttp2/nghttp2.git

at commit cc05c5fe8cfc8287ddc4930fa9684af878d9e631 (v1.40.0).

.gitattributes

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+* -whitespace

COPYING

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+The MIT License
+
+Copyright (c) 2012, 2014, 2015, 2016 Tatsuhiro Tsujikawa
+Copyright (c) 2012, 2014, 2015, 2016 nghttp2 contributors
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

lib/includes/nghttp2/nghttp2ver.h

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+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012, 2013 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2VER_H
+#define NGHTTP2VER_H
+
+/**
+ * @macro
+ * Version number of the nghttp2 library release
+ */
+#define NGHTTP2_VERSION "1.40.0"
+
+/**
+ * @macro
+ * Numerical representation of the version number of the nghttp2 library
+ * release. This is a 24 bit number with 8 bits for major number, 8 bits
+ * for minor and 8 bits for patch. Version 1.2.3 becomes 0x010203.
+ */
+#define NGHTTP2_VERSION_NUM 0x012800
+
+#endif /* NGHTTP2VER_H */

lib/nghttp2_buf.c

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+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2014 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_buf.h"
+
+#include <stdio.h>
+
+#include "nghttp2_helper.h"
+#include "nghttp2_debug.h"
+
+void nghttp2_buf_init(nghttp2_buf *buf) {
+  buf->begin = NULL;
+  buf->end = NULL;
+  buf->pos = NULL;
+  buf->last = NULL;
+  buf->mark = NULL;
+}
+
+int nghttp2_buf_init2(nghttp2_buf *buf, size_t initial, nghttp2_mem *mem) {
+  nghttp2_buf_init(buf);
+  return nghttp2_buf_reserve(buf, initial, mem);
+}
+
+void nghttp2_buf_free(nghttp2_buf *buf, nghttp2_mem *mem) {
+  if (buf == NULL) {
+    return;
+  }
+
+  nghttp2_mem_free(mem, buf->begin);
+  buf->begin = NULL;
+}
+
+int nghttp2_buf_reserve(nghttp2_buf *buf, size_t new_cap, nghttp2_mem *mem) {
+  uint8_t *ptr;
+  size_t cap;
+
+  cap = nghttp2_buf_cap(buf);
+
+  if (cap >= new_cap) {
+    return 0;
+  }
+
+  new_cap = nghttp2_max(new_cap, cap * 2);
+
+  ptr = nghttp2_mem_realloc(mem, buf->begin, new_cap);
+  if (ptr == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  buf->pos = ptr + (buf->pos - buf->begin);
+  buf->last = ptr + (buf->last - buf->begin);
+  buf->mark = ptr + (buf->mark - buf->begin);
+  buf->begin = ptr;
+  buf->end = ptr + new_cap;
+
+  return 0;
+}
+
+void nghttp2_buf_reset(nghttp2_buf *buf) {
+  buf->pos = buf->last = buf->mark = buf->begin;
+}
+
+void nghttp2_buf_wrap_init(nghttp2_buf *buf, uint8_t *begin, size_t len) {
+  buf->begin = buf->pos = buf->last = buf->mark = begin;
+  buf->end = begin + len;
+}
+
+static int buf_chain_new(nghttp2_buf_chain **chain, size_t chunk_length,
+                         nghttp2_mem *mem) {
+  int rv;
+
+  *chain = nghttp2_mem_malloc(mem, sizeof(nghttp2_buf_chain));
+  if (*chain == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  (*chain)->next = NULL;
+
+  rv = nghttp2_buf_init2(&(*chain)->buf, chunk_length, mem);
+  if (rv != 0) {
+    nghttp2_mem_free(mem, *chain);
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  return 0;
+}
+
+static void buf_chain_del(nghttp2_buf_chain *chain, nghttp2_mem *mem) {
+  nghttp2_buf_free(&chain->buf, mem);
+  nghttp2_mem_free(mem, chain);
+}
+
+int nghttp2_bufs_init(nghttp2_bufs *bufs, size_t chunk_length, size_t max_chunk,
+                      nghttp2_mem *mem) {
+  return nghttp2_bufs_init2(bufs, chunk_length, max_chunk, 0, mem);
+}
+
+int nghttp2_bufs_init2(nghttp2_bufs *bufs, size_t chunk_length,
+                       size_t max_chunk, size_t offset, nghttp2_mem *mem) {
+  return nghttp2_bufs_init3(bufs, chunk_length, max_chunk, max_chunk, offset,
+                            mem);
+}
+
+int nghttp2_bufs_init3(nghttp2_bufs *bufs, size_t chunk_length,
+                       size_t max_chunk, size_t chunk_keep, size_t offset,
+                       nghttp2_mem *mem) {
+  int rv;
+  nghttp2_buf_chain *chain;
+
+  if (chunk_keep == 0 || max_chunk < chunk_keep || chunk_length < offset) {
+    return NGHTTP2_ERR_INVALID_ARGUMENT;
+  }
+
+  rv = buf_chain_new(&chain, chunk_length, mem);
+  if (rv != 0) {
+    return rv;
+  }
+
+  bufs->mem = mem;
+  bufs->offset = offset;
+
+  bufs->head = chain;
+  bufs->cur = bufs->head;
+
+  nghttp2_buf_shift_right(&bufs->cur->buf, offset);
+
+  bufs->chunk_length = chunk_length;
+  bufs->chunk_used = 1;
+  bufs->max_chunk = max_chunk;
+  bufs->chunk_keep = chunk_keep;
+
+  return 0;
+}
+
+int nghttp2_bufs_realloc(nghttp2_bufs *bufs, size_t chunk_length) {
+  int rv;
+  nghttp2_buf_chain *chain;
+
+  if (chunk_length < bufs->offset) {
+    return NGHTTP2_ERR_INVALID_ARGUMENT;
+  }
+
+  rv = buf_chain_new(&chain, chunk_length, bufs->mem);
+  if (rv != 0) {
+    return rv;
+  }
+
+  nghttp2_bufs_free(bufs);
+
+  bufs->head = chain;
+  bufs->cur = bufs->head;
+
+  nghttp2_buf_shift_right(&bufs->cur->buf, bufs->offset);
+
+  bufs->chunk_length = chunk_length;
+  bufs->chunk_used = 1;
+
+  return 0;
+}
+
+void nghttp2_bufs_free(nghttp2_bufs *bufs) {
+  nghttp2_buf_chain *chain, *next_chain;
+
+  if (bufs == NULL) {
+    return;
+  }
+
+  for (chain = bufs->head; chain;) {
+    next_chain = chain->next;
+
+    buf_chain_del(chain, bufs->mem);
+
+    chain = next_chain;
+  }
+
+  bufs->head = NULL;
+}
+
+int nghttp2_bufs_wrap_init(nghttp2_bufs *bufs, uint8_t *begin, size_t len,
+                           nghttp2_mem *mem) {
+  nghttp2_buf_chain *chain;
+
+  chain = nghttp2_mem_malloc(mem, sizeof(nghttp2_buf_chain));
+  if (chain == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  chain->next = NULL;
+
+  nghttp2_buf_wrap_init(&chain->buf, begin, len);
+
+  bufs->mem = mem;
+  bufs->offset = 0;
+
+  bufs->head = chain;
+  bufs->cur = bufs->head;
+
+  bufs->chunk_length = len;
+  bufs->chunk_used = 1;
+  bufs->max_chunk = 1;
+  bufs->chunk_keep = 1;
+
+  return 0;
+}
+
+int nghttp2_bufs_wrap_init2(nghttp2_bufs *bufs, const nghttp2_vec *vec,
+                            size_t veclen, nghttp2_mem *mem) {
+  size_t i = 0;
+  nghttp2_buf_chain *cur_chain;
+  nghttp2_buf_chain *head_chain;
+  nghttp2_buf_chain **dst_chain = &head_chain;
+
+  if (veclen == 0) {
+    return nghttp2_bufs_wrap_init(bufs, NULL, 0, mem);
+  }
+
+  head_chain = nghttp2_mem_malloc(mem, sizeof(nghttp2_buf_chain) * veclen);
+  if (head_chain == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  for (i = 0; i < veclen; ++i) {
+    cur_chain = &head_chain[i];
+    cur_chain->next = NULL;
+    nghttp2_buf_wrap_init(&cur_chain->buf, vec[i].base, vec[i].len);
+
+    *dst_chain = cur_chain;
+    dst_chain = &cur_chain->next;
+  }
+
+  bufs->mem = mem;
+  bufs->offset = 0;
+
+  bufs->head = head_chain;
+  bufs->cur = bufs->head;
+
+  /* We don't use chunk_length since no allocation is expected. */
+  bufs->chunk_length = 0;
+  bufs->chunk_used = veclen;
+  bufs->max_chunk = veclen;
+  bufs->chunk_keep = veclen;
+
+  return 0;
+}
+
+void nghttp2_bufs_wrap_free(nghttp2_bufs *bufs) {
+  if (bufs == NULL) {
+    return;
+  }
+
+  if (bufs->head) {
+    nghttp2_mem_free(bufs->mem, bufs->head);
+  }
+}
+
+void nghttp2_bufs_seek_last_present(nghttp2_bufs *bufs) {
+  nghttp2_buf_chain *ci;
+
+  for (ci = bufs->cur; ci; ci = ci->next) {
+    if (nghttp2_buf_len(&ci->buf) == 0) {
+      return;
+    } else {
+      bufs->cur = ci;
+    }
+  }
+}
+
+size_t nghttp2_bufs_len(nghttp2_bufs *bufs) {
+  nghttp2_buf_chain *ci;
+  size_t len;
+
+  len = 0;
+  for (ci = bufs->head; ci; ci = ci->next) {
+    len += nghttp2_buf_len(&ci->buf);
+  }
+
+  return len;
+}
+
+static int bufs_alloc_chain(nghttp2_bufs *bufs) {
+  int rv;
+  nghttp2_buf_chain *chain;
+
+  if (bufs->cur->next) {
+    bufs->cur = bufs->cur->next;
+
+    return 0;
+  }
+
+  if (bufs->max_chunk == bufs->chunk_used) {
+    return NGHTTP2_ERR_BUFFER_ERROR;
+  }
+
+  rv = buf_chain_new(&chain, bufs->chunk_length, bufs->mem);
+  if (rv != 0) {
+    return rv;
+  }
+
+  DEBUGF("new buffer %zu bytes allocated for bufs %p, used %zu\n",
+         bufs->chunk_length, bufs, bufs->chunk_used);
+
+  ++bufs->chunk_used;
+
+  bufs->cur->next = chain;
+  bufs->cur = chain;
+
+  nghttp2_buf_shift_right(&bufs->cur->buf, bufs->offset);
+
+  return 0;
+}
+
+int nghttp2_bufs_add(nghttp2_bufs *bufs, const void *data, size_t len) {
+  int rv;
+  size_t nwrite;
+  nghttp2_buf *buf;
+  const uint8_t *p;
+
+  p = data;
+
+  while (len) {
+    buf = &bufs->cur->buf;
+
+    nwrite = nghttp2_min(nghttp2_buf_avail(buf), len);
+    if (nwrite == 0) {
+      rv = bufs_alloc_chain(bufs);
+      if (rv != 0) {
+        return rv;
+      }
+      continue;
+    }
+
+    buf->last = nghttp2_cpymem(buf->last, p, nwrite);
+    p += nwrite;
+    len -= nwrite;
+  }
+
+  return 0;
+}
+
+static int bufs_ensure_addb(nghttp2_bufs *bufs) {
+  int rv;
+  nghttp2_buf *buf;
+
+  buf = &bufs->cur->buf;
+
+  if (nghttp2_buf_avail(buf) > 0) {
+    return 0;
+  }
+
+  rv = bufs_alloc_chain(bufs);
+  if (rv != 0) {
+    return rv;
+  }
+
+  return 0;
+}
+
+int nghttp2_bufs_addb(nghttp2_bufs *bufs, uint8_t b) {
+  int rv;
+
+  rv = bufs_ensure_addb(bufs);
+  if (rv != 0) {
+    return rv;
+  }
+
+  *bufs->cur->buf.last++ = b;
+
+  return 0;
+}
+
+int nghttp2_bufs_addb_hold(nghttp2_bufs *bufs, uint8_t b) {
+  int rv;
+
+  rv = bufs_ensure_addb(bufs);
+  if (rv != 0) {
+    return rv;
+  }
+
+  *bufs->cur->buf.last = b;
+
+  return 0;
+}
+
+int nghttp2_bufs_orb(nghttp2_bufs *bufs, uint8_t b) {
+  int rv;
+
+  rv = bufs_ensure_addb(bufs);
+  if (rv != 0) {
+    return rv;
+  }
+
+  *bufs->cur->buf.last++ |= b;
+
+  return 0;
+}
+
+int nghttp2_bufs_orb_hold(nghttp2_bufs *bufs, uint8_t b) {
+  int rv;
+
+  rv = bufs_ensure_addb(bufs);
+  if (rv != 0) {
+    return rv;
+  }
+
+  *bufs->cur->buf.last |= b;
+
+  return 0;
+}
+
+ssize_t nghttp2_bufs_remove(nghttp2_bufs *bufs, uint8_t **out) {
+  size_t len;
+  nghttp2_buf_chain *chain;
+  nghttp2_buf *buf;
+  uint8_t *res;
+  nghttp2_buf resbuf;
+
+  len = 0;
+
+  for (chain = bufs->head; chain; chain = chain->next) {
+    len += nghttp2_buf_len(&chain->buf);
+  }
+
+  if (len == 0) {
+    res = NULL;
+    return 0;
+  }
+
+  res = nghttp2_mem_malloc(bufs->mem, len);
+  if (res == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  nghttp2_buf_wrap_init(&resbuf, res, len);
+
+  for (chain = bufs->head; chain; chain = chain->next) {
+    buf = &chain->buf;
+    resbuf.last = nghttp2_cpymem(resbuf.last, buf->pos, nghttp2_buf_len(buf));
+  }
+
+  *out = res;
+
+  return (ssize_t)len;
+}
+
+size_t nghttp2_bufs_remove_copy(nghttp2_bufs *bufs, uint8_t *out) {
+  size_t len;
+  nghttp2_buf_chain *chain;
+  nghttp2_buf *buf;
+  nghttp2_buf resbuf;
+
+  len = nghttp2_bufs_len(bufs);
+
+  nghttp2_buf_wrap_init(&resbuf, out, len);
+
+  for (chain = bufs->head; chain; chain = chain->next) {
+    buf = &chain->buf;
+    resbuf.last = nghttp2_cpymem(resbuf.last, buf->pos, nghttp2_buf_len(buf));
+  }
+
+  return len;
+}
+
+void nghttp2_bufs_reset(nghttp2_bufs *bufs) {
+  nghttp2_buf_chain *chain, *ci;
+  size_t k;
+
+  k = bufs->chunk_keep;
+
+  for (ci = bufs->head; ci; ci = ci->next) {
+    nghttp2_buf_reset(&ci->buf);
+    nghttp2_buf_shift_right(&ci->buf, bufs->offset);
+
+    if (--k == 0) {
+      break;
+    }
+  }
+
+  if (ci) {
+    chain = ci->next;
+    ci->next = NULL;
+
+    for (ci = chain; ci;) {
+      chain = ci->next;
+
+      buf_chain_del(ci, bufs->mem);
+
+      ci = chain;
+    }
+
+    bufs->chunk_used = bufs->chunk_keep;
+  }
+
+  bufs->cur = bufs->head;
+}
+
+int nghttp2_bufs_advance(nghttp2_bufs *bufs) { return bufs_alloc_chain(bufs); }
+
+int nghttp2_bufs_next_present(nghttp2_bufs *bufs) {
+  nghttp2_buf_chain *chain;
+
+  chain = bufs->cur->next;
+
+  return chain && nghttp2_buf_len(&chain->buf);
+}

lib/nghttp2_buf.h

@@ -0,0 +1,412 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2014 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_BUF_H
+#define NGHTTP2_BUF_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+
+#include "nghttp2_int.h"
+#include "nghttp2_mem.h"
+
+typedef struct {
+  /* This points to the beginning of the buffer. The effective range
+     of buffer is [begin, end). */
+  uint8_t *begin;
+  /* This points to the memory one byte beyond the end of the
+     buffer. */
+  uint8_t *end;
+  /* The position indicator for effective start of the buffer. pos <=
+     last must be hold. */
+  uint8_t *pos;
+  /* The position indicator for effective one beyond of the end of the
+     buffer. last <= end must be hold. */
+  uint8_t *last;
+  /* Mark arbitrary position in buffer [begin, end) */
+  uint8_t *mark;
+} nghttp2_buf;
+
+#define nghttp2_buf_len(BUF) ((size_t)((BUF)->last - (BUF)->pos))
+#define nghttp2_buf_avail(BUF) ((size_t)((BUF)->end - (BUF)->last))
+#define nghttp2_buf_mark_avail(BUF) ((size_t)((BUF)->mark - (BUF)->last))
+#define nghttp2_buf_cap(BUF) ((size_t)((BUF)->end - (BUF)->begin))
+
+#define nghttp2_buf_pos_offset(BUF) ((size_t)((BUF)->pos - (BUF)->begin))
+#define nghttp2_buf_last_offset(BUF) ((size_t)((BUF)->last - (BUF)->begin))
+
+#define nghttp2_buf_shift_right(BUF, AMT)                                      \
+  do {                                                                         \
+    (BUF)->pos += AMT;                                                         \
+    (BUF)->last += AMT;                                                        \
+  } while (0)
+
+#define nghttp2_buf_shift_left(BUF, AMT)                                       \
+  do {                                                                         \
+    (BUF)->pos -= AMT;                                                         \
+    (BUF)->last -= AMT;                                                        \
+  } while (0)
+
+/*
+ * Initializes the |buf|. No memory is allocated in this function. Use
+ * nghttp2_buf_reserve() to allocate memory.
+ */
+void nghttp2_buf_init(nghttp2_buf *buf);
+
+/*
+ * Initializes the |buf| and allocates at least |initial| bytes of
+ * memory.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ */
+int nghttp2_buf_init2(nghttp2_buf *buf, size_t initial, nghttp2_mem *mem);
+
+/*
+ * Frees buffer in |buf|.
+ */
+void nghttp2_buf_free(nghttp2_buf *buf, nghttp2_mem *mem);
+
+/*
+ * Extends buffer so that nghttp2_buf_cap() returns at least
+ * |new_cap|. If extensions took place, buffer pointers in |buf| will
+ * change.
+ *
+ * This function returns 0 if it succeeds, or one of the followings
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ */
+int nghttp2_buf_reserve(nghttp2_buf *buf, size_t new_cap, nghttp2_mem *mem);
+
+/*
+ * Resets pos, last, mark member of |buf| to buf->begin.
+ */
+void nghttp2_buf_reset(nghttp2_buf *buf);
+
+/*
+ * Initializes |buf| using supplied buffer |begin| of length
+ * |len|. Semantically, the application should not call *_reserve() or
+ * nghttp2_free() functions for |buf|.
+ */
+void nghttp2_buf_wrap_init(nghttp2_buf *buf, uint8_t *begin, size_t len);
+
+struct nghttp2_buf_chain;
+
+typedef struct nghttp2_buf_chain nghttp2_buf_chain;
+
+/* Chains 2 buffers */
+struct nghttp2_buf_chain {
+  /* Points to the subsequent buffer. NULL if there is no such
+     buffer. */
+  nghttp2_buf_chain *next;
+  nghttp2_buf buf;
+};
+
+typedef struct {
+  /* Points to the first buffer */
+  nghttp2_buf_chain *head;
+  /* Buffer pointer where write occurs. */
+  nghttp2_buf_chain *cur;
+  /* Memory allocator */
+  nghttp2_mem *mem;
+  /* The buffer capacity of each buf.  This field may be 0 if
+     nghttp2_bufs is initialized by nghttp2_bufs_wrap_init* family
+     functions. */
+  size_t chunk_length;
+  /* The maximum number of nghttp2_buf_chain */
+  size_t max_chunk;
+  /* The number of nghttp2_buf_chain allocated */
+  size_t chunk_used;
+  /* The number of nghttp2_buf_chain to keep on reset */
+  size_t chunk_keep;
+  /* pos offset from begin in each buffers. On initialization and
+     reset, buf->pos and buf->last are positioned at buf->begin +
+     offset. */
+  size_t offset;
+} nghttp2_bufs;
+
+/*
+ * This is the same as calling nghttp2_bufs_init2 with the given
+ * arguments and offset = 0.
+ */
+int nghttp2_bufs_init(nghttp2_bufs *bufs, size_t chunk_length, size_t max_chunk,
+                      nghttp2_mem *mem);
+
+/*
+ * This is the same as calling nghttp2_bufs_init3 with the given
+ * arguments and chunk_keep = max_chunk.
+ */
+int nghttp2_bufs_init2(nghttp2_bufs *bufs, size_t chunk_length,
+                       size_t max_chunk, size_t offset, nghttp2_mem *mem);
+
+/*
+ * Initializes |bufs|. Each buffer size is given in the
+ * |chunk_length|.  The maximum number of buffers is given in the
+ * |max_chunk|.  On reset, first |chunk_keep| buffers are kept and
+ * remaining buffers are deleted.  Each buffer will have bufs->pos and
+ * bufs->last shifted to left by |offset| bytes on creation and reset.
+ *
+ * This function allocates first buffer.  bufs->head and bufs->cur
+ * will point to the first buffer after this call.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_INVALID_ARGUMENT
+ *     chunk_keep is 0; or max_chunk < chunk_keep; or offset is too
+ *     long.
+ */
+int nghttp2_bufs_init3(nghttp2_bufs *bufs, size_t chunk_length,
+                       size_t max_chunk, size_t chunk_keep, size_t offset,
+                       nghttp2_mem *mem);
+
+/*
+ * Frees any related resources to the |bufs|.
+ */
+void nghttp2_bufs_free(nghttp2_bufs *bufs);
+
+/*
+ * Initializes |bufs| using supplied buffer |begin| of length |len|.
+ * The first buffer bufs->head uses buffer |begin|.  The buffer size
+ * is fixed and no extra chunk buffer is allocated.  In other
+ * words, max_chunk = chunk_keep = 1.  To free the resource allocated
+ * for |bufs|, use nghttp2_bufs_wrap_free().
+ *
+ * Don't use the function which performs allocation, such as
+ * nghttp2_bufs_realloc().
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ */
+int nghttp2_bufs_wrap_init(nghttp2_bufs *bufs, uint8_t *begin, size_t len,
+                           nghttp2_mem *mem);
+
+/*
+ * Initializes |bufs| using supplied |veclen| size of buf vector
+ * |vec|.  The number of buffers is fixed and no extra chunk buffer is
+ * allocated.  In other words, max_chunk = chunk_keep = |in_len|.  To
+ * free the resource allocated for |bufs|, use
+ * nghttp2_bufs_wrap_free().
+ *
+ * Don't use the function which performs allocation, such as
+ * nghttp2_bufs_realloc().
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ */
+int nghttp2_bufs_wrap_init2(nghttp2_bufs *bufs, const nghttp2_vec *vec,
+                            size_t veclen, nghttp2_mem *mem);
+
+/*
+ * Frees any related resource to the |bufs|.  This function does not
+ * free supplied buffer provided in nghttp2_bufs_wrap_init().
+ */
+void nghttp2_bufs_wrap_free(nghttp2_bufs *bufs);
+
+/*
+ * Reallocates internal buffer using |chunk_length|.  The max_chunk,
+ * chunk_keep and offset do not change.  After successful allocation
+ * of new buffer, previous buffers are deallocated without copying
+ * anything into new buffers.  chunk_used is reset to 1.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_INVALID_ARGUMENT
+ *     chunk_length < offset
+ */
+int nghttp2_bufs_realloc(nghttp2_bufs *bufs, size_t chunk_length);
+
+/*
+ * Appends the |data| of length |len| to the |bufs|. The write starts
+ * at bufs->cur->buf.last. A new buffers will be allocated to store
+ * all data.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_BUFFER_ERROR
+ *     Out of buffer space.
+ */
+int nghttp2_bufs_add(nghttp2_bufs *bufs, const void *data, size_t len);
+
+/*
+ * Appends a single byte |b| to the |bufs|. The write starts at
+ * bufs->cur->buf.last. A new buffers will be allocated to store all
+ * data.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_BUFFER_ERROR
+ *     Out of buffer space.
+ */
+int nghttp2_bufs_addb(nghttp2_bufs *bufs, uint8_t b);
+
+/*
+ * Behaves like nghttp2_bufs_addb(), but this does not update
+ * buf->last pointer.
+ */
+int nghttp2_bufs_addb_hold(nghttp2_bufs *bufs, uint8_t b);
+
+#define nghttp2_bufs_fast_addb(BUFS, B)                                        \
+  do {                                                                         \
+    *(BUFS)->cur->buf.last++ = B;                                              \
+  } while (0)
+
+#define nghttp2_bufs_fast_addb_hold(BUFS, B)                                   \
+  do {                                                                         \
+    *(BUFS)->cur->buf.last = B;                                                \
+  } while (0)
+
+/*
+ * Performs bitwise-OR of |b| at bufs->cur->buf.last. A new buffers
+ * will be allocated if necessary.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_BUFFER_ERROR
+ *     Out of buffer space.
+ */
+int nghttp2_bufs_orb(nghttp2_bufs *bufs, uint8_t b);
+
+/*
+ * Behaves like nghttp2_bufs_orb(), but does not update buf->last
+ * pointer.
+ */
+int nghttp2_bufs_orb_hold(nghttp2_bufs *bufs, uint8_t b);
+
+#define nghttp2_bufs_fast_orb(BUFS, B)                                         \
+  do {                                                                         \
+    uint8_t **p = &(BUFS)->cur->buf.last;                                      \
+    **p = (uint8_t)(**p | (B));                                                \
+    ++(*p);                                                                    \
+  } while (0)
+
+#define nghttp2_bufs_fast_orb_hold(BUFS, B)                                    \
+  do {                                                                         \
+    uint8_t *p = (BUFS)->cur->buf.last;                                        \
+    *p = (uint8_t)(*p | (B));                                                  \
+  } while (0)
+
+/*
+ * Copies all data stored in |bufs| to the contiguous buffer.  This
+ * function allocates the contiguous memory to store all data in
+ * |bufs| and assigns it to |*out|.
+ *
+ * The contents of |bufs| is left unchanged.
+ *
+ * This function returns the length of copied data and assigns the
+ * pointer to copied data to |*out| if it succeeds, or one of the
+ * following negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ */
+ssize_t nghttp2_bufs_remove(nghttp2_bufs *bufs, uint8_t **out);
+
+/*
+ * Copies all data stored in |bufs| to |out|.  This function assumes
+ * that the buffer space pointed by |out| has at least
+ * nghttp2_bufs(bufs) bytes.
+ *
+ * The contents of |bufs| is left unchanged.
+ *
+ * This function returns the length of copied data.
+ */
+size_t nghttp2_bufs_remove_copy(nghttp2_bufs *bufs, uint8_t *out);
+
+/*
+ * Resets |bufs| and makes the buffers empty.
+ */
+void nghttp2_bufs_reset(nghttp2_bufs *bufs);
+
+/*
+ * Moves bufs->cur to bufs->cur->next.  If resulting bufs->cur is
+ * NULL, this function allocates new buffers and bufs->cur points to
+ * it.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ * NGHTTP2_ERR_BUFFER_ERROR
+ *     Out of buffer space.
+ */
+int nghttp2_bufs_advance(nghttp2_bufs *bufs);
+
+/* Sets bufs->cur to bufs->head */
+#define nghttp2_bufs_rewind(BUFS)                                              \
+  do {                                                                         \
+    (BUFS)->cur = (BUFS)->head;                                                \
+  } while (0)
+
+/*
+ * Move bufs->cur, from the current position, using next member, to
+ * the last buf which has nghttp2_buf_len(buf) > 0 without seeing buf
+ * which satisfies nghttp2_buf_len(buf) == 0.  If
+ * nghttp2_buf_len(&bufs->cur->buf) == 0 or bufs->cur->next is NULL,
+ * bufs->cur is unchanged.
+ */
+void nghttp2_bufs_seek_last_present(nghttp2_bufs *bufs);
+
+/*
+ * Returns nonzero if bufs->cur->next is not empty.
+ */
+int nghttp2_bufs_next_present(nghttp2_bufs *bufs);
+
+#define nghttp2_bufs_cur_avail(BUFS) nghttp2_buf_avail(&(BUFS)->cur->buf)
+
+/*
+ * Returns the total buffer length of |bufs|.
+ */
+size_t nghttp2_bufs_len(nghttp2_bufs *bufs);
+
+#endif /* NGHTTP2_BUF_H */

lib/nghttp2_callbacks.c

@@ -0,0 +1,175 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2014 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_callbacks.h"
+
+#include <stdlib.h>
+
+int nghttp2_session_callbacks_new(nghttp2_session_callbacks **callbacks_ptr) {
+  *callbacks_ptr = calloc(1, sizeof(nghttp2_session_callbacks));
+
+  if (*callbacks_ptr == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  return 0;
+}
+
+void nghttp2_session_callbacks_del(nghttp2_session_callbacks *callbacks) {
+  free(callbacks);
+}
+
+void nghttp2_session_callbacks_set_send_callback(
+    nghttp2_session_callbacks *cbs, nghttp2_send_callback send_callback) {
+  cbs->send_callback = send_callback;
+}
+
+void nghttp2_session_callbacks_set_recv_callback(
+    nghttp2_session_callbacks *cbs, nghttp2_recv_callback recv_callback) {
+  cbs->recv_callback = recv_callback;
+}
+
+void nghttp2_session_callbacks_set_on_frame_recv_callback(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_on_frame_recv_callback on_frame_recv_callback) {
+  cbs->on_frame_recv_callback = on_frame_recv_callback;
+}
+
+void nghttp2_session_callbacks_set_on_invalid_frame_recv_callback(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_on_invalid_frame_recv_callback on_invalid_frame_recv_callback) {
+  cbs->on_invalid_frame_recv_callback = on_invalid_frame_recv_callback;
+}
+
+void nghttp2_session_callbacks_set_on_data_chunk_recv_callback(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_on_data_chunk_recv_callback on_data_chunk_recv_callback) {
+  cbs->on_data_chunk_recv_callback = on_data_chunk_recv_callback;
+}
+
+void nghttp2_session_callbacks_set_before_frame_send_callback(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_before_frame_send_callback before_frame_send_callback) {
+  cbs->before_frame_send_callback = before_frame_send_callback;
+}
+
+void nghttp2_session_callbacks_set_on_frame_send_callback(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_on_frame_send_callback on_frame_send_callback) {
+  cbs->on_frame_send_callback = on_frame_send_callback;
+}
+
+void nghttp2_session_callbacks_set_on_frame_not_send_callback(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_on_frame_not_send_callback on_frame_not_send_callback) {
+  cbs->on_frame_not_send_callback = on_frame_not_send_callback;
+}
+
+void nghttp2_session_callbacks_set_on_stream_close_callback(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_on_stream_close_callback on_stream_close_callback) {
+  cbs->on_stream_close_callback = on_stream_close_callback;
+}
+
+void nghttp2_session_callbacks_set_on_begin_headers_callback(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_on_begin_headers_callback on_begin_headers_callback) {
+  cbs->on_begin_headers_callback = on_begin_headers_callback;
+}
+
+void nghttp2_session_callbacks_set_on_header_callback(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_on_header_callback on_header_callback) {
+  cbs->on_header_callback = on_header_callback;
+}
+
+void nghttp2_session_callbacks_set_on_header_callback2(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_on_header_callback2 on_header_callback2) {
+  cbs->on_header_callback2 = on_header_callback2;
+}
+
+void nghttp2_session_callbacks_set_on_invalid_header_callback(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_on_invalid_header_callback on_invalid_header_callback) {
+  cbs->on_invalid_header_callback = on_invalid_header_callback;
+}
+
+void nghttp2_session_callbacks_set_on_invalid_header_callback2(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_on_invalid_header_callback2 on_invalid_header_callback2) {
+  cbs->on_invalid_header_callback2 = on_invalid_header_callback2;
+}
+
+void nghttp2_session_callbacks_set_select_padding_callback(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_select_padding_callback select_padding_callback) {
+  cbs->select_padding_callback = select_padding_callback;
+}
+
+void nghttp2_session_callbacks_set_data_source_read_length_callback(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_data_source_read_length_callback data_source_read_length_callback) {
+  cbs->read_length_callback = data_source_read_length_callback;
+}
+
+void nghttp2_session_callbacks_set_on_begin_frame_callback(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_on_begin_frame_callback on_begin_frame_callback) {
+  cbs->on_begin_frame_callback = on_begin_frame_callback;
+}
+
+void nghttp2_session_callbacks_set_send_data_callback(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_send_data_callback send_data_callback) {
+  cbs->send_data_callback = send_data_callback;
+}
+
+void nghttp2_session_callbacks_set_pack_extension_callback(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_pack_extension_callback pack_extension_callback) {
+  cbs->pack_extension_callback = pack_extension_callback;
+}
+
+void nghttp2_session_callbacks_set_unpack_extension_callback(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_unpack_extension_callback unpack_extension_callback) {
+  cbs->unpack_extension_callback = unpack_extension_callback;
+}
+
+void nghttp2_session_callbacks_set_on_extension_chunk_recv_callback(
+    nghttp2_session_callbacks *cbs,
+    nghttp2_on_extension_chunk_recv_callback on_extension_chunk_recv_callback) {
+  cbs->on_extension_chunk_recv_callback = on_extension_chunk_recv_callback;
+}
+
+void nghttp2_session_callbacks_set_error_callback(
+    nghttp2_session_callbacks *cbs, nghttp2_error_callback error_callback) {
+  cbs->error_callback = error_callback;
+}
+
+void nghttp2_session_callbacks_set_error_callback2(
+    nghttp2_session_callbacks *cbs, nghttp2_error_callback2 error_callback2) {
+  cbs->error_callback2 = error_callback2;
+}

lib/nghttp2_callbacks.h

@@ -0,0 +1,125 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2014 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_CALLBACKS_H
+#define NGHTTP2_CALLBACKS_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+
+/*
+ * Callback functions.
+ */
+struct nghttp2_session_callbacks {
+  /**
+   * Callback function invoked when the session wants to send data to
+   * the remote peer.  This callback is not necessary if the
+   * application uses solely `nghttp2_session_mem_send()` to serialize
+   * data to transmit.
+   */
+  nghttp2_send_callback send_callback;
+  /**
+   * Callback function invoked when the session wants to receive data
+   * from the remote peer.  This callback is not necessary if the
+   * application uses solely `nghttp2_session_mem_recv()` to process
+   * received data.
+   */
+  nghttp2_recv_callback recv_callback;
+  /**
+   * Callback function invoked by `nghttp2_session_recv()` when a
+   * frame is received.
+   */
+  nghttp2_on_frame_recv_callback on_frame_recv_callback;
+  /**
+   * Callback function invoked by `nghttp2_session_recv()` when an
+   * invalid non-DATA frame is received.
+   */
+  nghttp2_on_invalid_frame_recv_callback on_invalid_frame_recv_callback;
+  /**
+   * Callback function invoked when a chunk of data in DATA frame is
+   * received.
+   */
+  nghttp2_on_data_chunk_recv_callback on_data_chunk_recv_callback;
+  /**
+   * Callback function invoked before a non-DATA frame is sent.
+   */
+  nghttp2_before_frame_send_callback before_frame_send_callback;
+  /**
+   * Callback function invoked after a frame is sent.
+   */
+  nghttp2_on_frame_send_callback on_frame_send_callback;
+  /**
+   * The callback function invoked when a non-DATA frame is not sent
+   * because of an error.
+   */
+  nghttp2_on_frame_not_send_callback on_frame_not_send_callback;
+  /**
+   * Callback function invoked when the stream is closed.
+   */
+  nghttp2_on_stream_close_callback on_stream_close_callback;
+  /**
+   * Callback function invoked when the reception of header block in
+   * HEADERS or PUSH_PROMISE is started.
+   */
+  nghttp2_on_begin_headers_callback on_begin_headers_callback;
+  /**
+   * Callback function invoked when a header name/value pair is
+   * received.
+   */
+  nghttp2_on_header_callback on_header_callback;
+  nghttp2_on_header_callback2 on_header_callback2;
+  /**
+   * Callback function invoked when a invalid header name/value pair
+   * is received which is silently ignored if these callbacks are not
+   * set.
+   */
+  nghttp2_on_invalid_header_callback on_invalid_header_callback;
+  nghttp2_on_invalid_header_callback2 on_invalid_header_callback2;
+  /**
+   * Callback function invoked when the library asks application how
+   * many padding bytes are required for the transmission of the given
+   * frame.
+   */
+  nghttp2_select_padding_callback select_padding_callback;
+  /**
+   * The callback function used to determine the length allowed in
+   * `nghttp2_data_source_read_callback()`
+   */
+  nghttp2_data_source_read_length_callback read_length_callback;
+  /**
+   * Sets callback function invoked when a frame header is received.
+   */
+  nghttp2_on_begin_frame_callback on_begin_frame_callback;
+  nghttp2_send_data_callback send_data_callback;
+  nghttp2_pack_extension_callback pack_extension_callback;
+  nghttp2_unpack_extension_callback unpack_extension_callback;
+  nghttp2_on_extension_chunk_recv_callback on_extension_chunk_recv_callback;
+  nghttp2_error_callback error_callback;
+  nghttp2_error_callback2 error_callback2;
+};
+
+#endif /* NGHTTP2_CALLBACKS_H */

lib/nghttp2_debug.c

@@ -0,0 +1,60 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2016 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_debug.h"
+
+#include <stdio.h>
+
+#ifdef DEBUGBUILD
+
+static void nghttp2_default_debug_vfprintf_callback(const char *fmt,
+                                                    va_list args) {
+  vfprintf(stderr, fmt, args);
+}
+
+static nghttp2_debug_vprintf_callback static_debug_vprintf_callback =
+    nghttp2_default_debug_vfprintf_callback;
+
+void nghttp2_debug_vprintf(const char *format, ...) {
+  if (static_debug_vprintf_callback) {
+    va_list args;
+    va_start(args, format);
+    static_debug_vprintf_callback(format, args);
+    va_end(args);
+  }
+}
+
+void nghttp2_set_debug_vprintf_callback(
+    nghttp2_debug_vprintf_callback debug_vprintf_callback) {
+  static_debug_vprintf_callback = debug_vprintf_callback;
+}
+
+#else /* !DEBUGBUILD */
+
+void nghttp2_set_debug_vprintf_callback(
+    nghttp2_debug_vprintf_callback debug_vprintf_callback) {
+  (void)debug_vprintf_callback;
+}
+
+#endif /* !DEBUGBUILD */

lib/nghttp2_debug.h

@@ -0,0 +1,43 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2016 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_DEBUG_H
+#define NGHTTP2_DEBUG_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+
+#ifdef DEBUGBUILD
+#  define DEBUGF(...) nghttp2_debug_vprintf(__VA_ARGS__)
+void nghttp2_debug_vprintf(const char *format, ...);
+#else
+#  define DEBUGF(...)                                                          \
+    do {                                                                       \
+    } while (0)
+#endif
+
+#endif /* NGHTTP2_DEBUG_H */

lib/nghttp2_frame.c

@@ -0,0 +1,1134 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2013 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_frame.h"
+
+#include <string.h>
+#include <assert.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "nghttp2_helper.h"
+#include "nghttp2_net.h"
+#include "nghttp2_priority_spec.h"
+#include "nghttp2_debug.h"
+
+void nghttp2_frame_pack_frame_hd(uint8_t *buf, const nghttp2_frame_hd *hd) {
+  nghttp2_put_uint32be(&buf[0], (uint32_t)(hd->length << 8));
+  buf[3] = hd->type;
+  buf[4] = hd->flags;
+  nghttp2_put_uint32be(&buf[5], (uint32_t)hd->stream_id);
+  /* ignore hd->reserved for now */
+}
+
+void nghttp2_frame_unpack_frame_hd(nghttp2_frame_hd *hd, const uint8_t *buf) {
+  hd->length = nghttp2_get_uint32(&buf[0]) >> 8;
+  hd->type = buf[3];
+  hd->flags = buf[4];
+  hd->stream_id = nghttp2_get_uint32(&buf[5]) & NGHTTP2_STREAM_ID_MASK;
+  hd->reserved = 0;
+}
+
+void nghttp2_frame_hd_init(nghttp2_frame_hd *hd, size_t length, uint8_t type,
+                           uint8_t flags, int32_t stream_id) {
+  hd->length = length;
+  hd->type = type;
+  hd->flags = flags;
+  hd->stream_id = stream_id;
+  hd->reserved = 0;
+}
+
+void nghttp2_frame_headers_init(nghttp2_headers *frame, uint8_t flags,
+                                int32_t stream_id, nghttp2_headers_category cat,
+                                const nghttp2_priority_spec *pri_spec,
+                                nghttp2_nv *nva, size_t nvlen) {
+  nghttp2_frame_hd_init(&frame->hd, 0, NGHTTP2_HEADERS, flags, stream_id);
+  frame->padlen = 0;
+  frame->nva = nva;
+  frame->nvlen = nvlen;
+  frame->cat = cat;
+
+  if (pri_spec) {
+    frame->pri_spec = *pri_spec;
+  } else {
+    nghttp2_priority_spec_default_init(&frame->pri_spec);
+  }
+}
+
+void nghttp2_frame_headers_free(nghttp2_headers *frame, nghttp2_mem *mem) {
+  nghttp2_nv_array_del(frame->nva, mem);
+}
+
+void nghttp2_frame_priority_init(nghttp2_priority *frame, int32_t stream_id,
+                                 const nghttp2_priority_spec *pri_spec) {
+  nghttp2_frame_hd_init(&frame->hd, NGHTTP2_PRIORITY_SPECLEN, NGHTTP2_PRIORITY,
+                        NGHTTP2_FLAG_NONE, stream_id);
+  frame->pri_spec = *pri_spec;
+}
+
+void nghttp2_frame_priority_free(nghttp2_priority *frame) { (void)frame; }
+
+void nghttp2_frame_rst_stream_init(nghttp2_rst_stream *frame, int32_t stream_id,
+                                   uint32_t error_code) {
+  nghttp2_frame_hd_init(&frame->hd, 4, NGHTTP2_RST_STREAM, NGHTTP2_FLAG_NONE,
+                        stream_id);
+  frame->error_code = error_code;
+}
+
+void nghttp2_frame_rst_stream_free(nghttp2_rst_stream *frame) { (void)frame; }
+
+void nghttp2_frame_settings_init(nghttp2_settings *frame, uint8_t flags,
+                                 nghttp2_settings_entry *iv, size_t niv) {
+  nghttp2_frame_hd_init(&frame->hd, niv * NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH,
+                        NGHTTP2_SETTINGS, flags, 0);
+  frame->niv = niv;
+  frame->iv = iv;
+}
+
+void nghttp2_frame_settings_free(nghttp2_settings *frame, nghttp2_mem *mem) {
+  nghttp2_mem_free(mem, frame->iv);
+}
+
+void nghttp2_frame_push_promise_init(nghttp2_push_promise *frame, uint8_t flags,
+                                     int32_t stream_id,
+                                     int32_t promised_stream_id,
+                                     nghttp2_nv *nva, size_t nvlen) {
+  nghttp2_frame_hd_init(&frame->hd, 0, NGHTTP2_PUSH_PROMISE, flags, stream_id);
+  frame->padlen = 0;
+  frame->nva = nva;
+  frame->nvlen = nvlen;
+  frame->promised_stream_id = promised_stream_id;
+  frame->reserved = 0;
+}
+
+void nghttp2_frame_push_promise_free(nghttp2_push_promise *frame,
+                                     nghttp2_mem *mem) {
+  nghttp2_nv_array_del(frame->nva, mem);
+}
+
+void nghttp2_frame_ping_init(nghttp2_ping *frame, uint8_t flags,
+                             const uint8_t *opaque_data) {
+  nghttp2_frame_hd_init(&frame->hd, 8, NGHTTP2_PING, flags, 0);
+  if (opaque_data) {
+    memcpy(frame->opaque_data, opaque_data, sizeof(frame->opaque_data));
+  } else {
+    memset(frame->opaque_data, 0, sizeof(frame->opaque_data));
+  }
+}
+
+void nghttp2_frame_ping_free(nghttp2_ping *frame) { (void)frame; }
+
+void nghttp2_frame_goaway_init(nghttp2_goaway *frame, int32_t last_stream_id,
+                               uint32_t error_code, uint8_t *opaque_data,
+                               size_t opaque_data_len) {
+  nghttp2_frame_hd_init(&frame->hd, 8 + opaque_data_len, NGHTTP2_GOAWAY,
+                        NGHTTP2_FLAG_NONE, 0);
+  frame->last_stream_id = last_stream_id;
+  frame->error_code = error_code;
+  frame->opaque_data = opaque_data;
+  frame->opaque_data_len = opaque_data_len;
+  frame->reserved = 0;
+}
+
+void nghttp2_frame_goaway_free(nghttp2_goaway *frame, nghttp2_mem *mem) {
+  nghttp2_mem_free(mem, frame->opaque_data);
+}
+
+void nghttp2_frame_window_update_init(nghttp2_window_update *frame,
+                                      uint8_t flags, int32_t stream_id,
+                                      int32_t window_size_increment) {
+  nghttp2_frame_hd_init(&frame->hd, 4, NGHTTP2_WINDOW_UPDATE, flags, stream_id);
+  frame->window_size_increment = window_size_increment;
+  frame->reserved = 0;
+}
+
+void nghttp2_frame_window_update_free(nghttp2_window_update *frame) {
+  (void)frame;
+}
+
+size_t nghttp2_frame_trail_padlen(nghttp2_frame *frame, size_t padlen) {
+  /* We have iframe->padlen == 0, but iframe->frame.hd.flags may have
+     NGHTTP2_FLAG_PADDED set.  This happens when receiving
+     CONTINUATION frame, since we don't reset flags after HEADERS was
+     received. */
+  if (padlen == 0) {
+    return 0;
+  }
+  return padlen - ((frame->hd.flags & NGHTTP2_FLAG_PADDED) > 0);
+}
+
+void nghttp2_frame_data_init(nghttp2_data *frame, uint8_t flags,
+                             int32_t stream_id) {
+  /* At this moment, the length of DATA frame is unknown */
+  nghttp2_frame_hd_init(&frame->hd, 0, NGHTTP2_DATA, flags, stream_id);
+  frame->padlen = 0;
+}
+
+void nghttp2_frame_data_free(nghttp2_data *frame) { (void)frame; }
+
+void nghttp2_frame_extension_init(nghttp2_extension *frame, uint8_t type,
+                                  uint8_t flags, int32_t stream_id,
+                                  void *payload) {
+  nghttp2_frame_hd_init(&frame->hd, 0, type, flags, stream_id);
+  frame->payload = payload;
+}
+
+void nghttp2_frame_extension_free(nghttp2_extension *frame) { (void)frame; }
+
+void nghttp2_frame_altsvc_init(nghttp2_extension *frame, int32_t stream_id,
+                               uint8_t *origin, size_t origin_len,
+                               uint8_t *field_value, size_t field_value_len) {
+  nghttp2_ext_altsvc *altsvc;
+
+  nghttp2_frame_hd_init(&frame->hd, 2 + origin_len + field_value_len,
+                        NGHTTP2_ALTSVC, NGHTTP2_FLAG_NONE, stream_id);
+
+  altsvc = frame->payload;
+  altsvc->origin = origin;
+  altsvc->origin_len = origin_len;
+  altsvc->field_value = field_value;
+  altsvc->field_value_len = field_value_len;
+}
+
+void nghttp2_frame_altsvc_free(nghttp2_extension *frame, nghttp2_mem *mem) {
+  nghttp2_ext_altsvc *altsvc;
+
+  altsvc = frame->payload;
+  if (altsvc == NULL) {
+    return;
+  }
+  /* We use the same buffer for altsvc->origin and
+     altsvc->field_value. */
+  nghttp2_mem_free(mem, altsvc->origin);
+}
+
+void nghttp2_frame_origin_init(nghttp2_extension *frame,
+                               nghttp2_origin_entry *ov, size_t nov) {
+  nghttp2_ext_origin *origin;
+  size_t payloadlen = 0;
+  size_t i;
+
+  for (i = 0; i < nov; ++i) {
+    payloadlen += 2 + ov[i].origin_len;
+  }
+
+  nghttp2_frame_hd_init(&frame->hd, payloadlen, NGHTTP2_ORIGIN,
+                        NGHTTP2_FLAG_NONE, 0);
+
+  origin = frame->payload;
+  origin->ov = ov;
+  origin->nov = nov;
+}
+
+void nghttp2_frame_origin_free(nghttp2_extension *frame, nghttp2_mem *mem) {
+  nghttp2_ext_origin *origin;
+
+  origin = frame->payload;
+  if (origin == NULL) {
+    return;
+  }
+  /* We use the same buffer for all resources pointed by the field of
+     origin directly or indirectly. */
+  nghttp2_mem_free(mem, origin->ov);
+}
+
+size_t nghttp2_frame_priority_len(uint8_t flags) {
+  if (flags & NGHTTP2_FLAG_PRIORITY) {
+    return NGHTTP2_PRIORITY_SPECLEN;
+  }
+
+  return 0;
+}
+
+size_t nghttp2_frame_headers_payload_nv_offset(nghttp2_headers *frame) {
+  return nghttp2_frame_priority_len(frame->hd.flags);
+}
+
+/*
+ * Call this function after payload was serialized, but not before
+ * changing buf->pos and serializing frame header.
+ *
+ * This function assumes bufs->cur points to the last buf chain of the
+ * frame(s).
+ *
+ * This function serializes frame header for HEADERS/PUSH_PROMISE and
+ * handles their successive CONTINUATION frames.
+ *
+ * We don't process any padding here.
+ */
+static int frame_pack_headers_shared(nghttp2_bufs *bufs,
+                                     nghttp2_frame_hd *frame_hd) {
+  nghttp2_buf *buf;
+  nghttp2_buf_chain *ci, *ce;
+  nghttp2_frame_hd hd;
+
+  buf = &bufs->head->buf;
+
+  hd = *frame_hd;
+  hd.length = nghttp2_buf_len(buf);
+
+  DEBUGF("send: HEADERS/PUSH_PROMISE, payloadlen=%zu\n", hd.length);
+
+  /* We have multiple frame buffers, which means one or more
+     CONTINUATION frame is involved. Remove END_HEADERS flag from the
+     first frame. */
+  if (bufs->head != bufs->cur) {
+    hd.flags = (uint8_t)(hd.flags & ~NGHTTP2_FLAG_END_HEADERS);
+  }
+
+  buf->pos -= NGHTTP2_FRAME_HDLEN;
+  nghttp2_frame_pack_frame_hd(buf->pos, &hd);
+
+  if (bufs->head != bufs->cur) {
+    /* 2nd and later frames are CONTINUATION frames. */
+    hd.type = NGHTTP2_CONTINUATION;
+    /* We don't have no flags except for last CONTINUATION */
+    hd.flags = NGHTTP2_FLAG_NONE;
+
+    ce = bufs->cur;
+
+    for (ci = bufs->head->next; ci != ce; ci = ci->next) {
+      buf = &ci->buf;
+
+      hd.length = nghttp2_buf_len(buf);
+
+      DEBUGF("send: int CONTINUATION, payloadlen=%zu\n", hd.length);
+
+      buf->pos -= NGHTTP2_FRAME_HDLEN;
+      nghttp2_frame_pack_frame_hd(buf->pos, &hd);
+    }
+
+    buf = &ci->buf;
+    hd.length = nghttp2_buf_len(buf);
+    /* Set END_HEADERS flag for last CONTINUATION */
+    hd.flags = NGHTTP2_FLAG_END_HEADERS;
+
+    DEBUGF("send: last CONTINUATION, payloadlen=%zu\n", hd.length);
+
+    buf->pos -= NGHTTP2_FRAME_HDLEN;
+    nghttp2_frame_pack_frame_hd(buf->pos, &hd);
+  }
+
+  return 0;
+}
+
+int nghttp2_frame_pack_headers(nghttp2_bufs *bufs, nghttp2_headers *frame,
+                               nghttp2_hd_deflater *deflater) {
+  size_t nv_offset;
+  int rv;
+  nghttp2_buf *buf;
+
+  assert(bufs->head == bufs->cur);
+
+  nv_offset = nghttp2_frame_headers_payload_nv_offset(frame);
+
+  buf = &bufs->cur->buf;
+
+  buf->pos += nv_offset;
+  buf->last = buf->pos;
+
+  /* This call will adjust buf->last to the correct position */
+  rv = nghttp2_hd_deflate_hd_bufs(deflater, bufs, frame->nva, frame->nvlen);
+
+  if (rv == NGHTTP2_ERR_BUFFER_ERROR) {
+    rv = NGHTTP2_ERR_HEADER_COMP;
+  }
+
+  buf->pos -= nv_offset;
+
+  if (rv != 0) {
+    return rv;
+  }
+
+  if (frame->hd.flags & NGHTTP2_FLAG_PRIORITY) {
+    nghttp2_frame_pack_priority_spec(buf->pos, &frame->pri_spec);
+  }
+
+  frame->padlen = 0;
+  frame->hd.length = nghttp2_bufs_len(bufs);
+
+  return frame_pack_headers_shared(bufs, &frame->hd);
+}
+
+void nghttp2_frame_pack_priority_spec(uint8_t *buf,
+                                      const nghttp2_priority_spec *pri_spec) {
+  nghttp2_put_uint32be(buf, (uint32_t)pri_spec->stream_id);
+  if (pri_spec->exclusive) {
+    buf[0] |= 0x80;
+  }
+  buf[4] = (uint8_t)(pri_spec->weight - 1);
+}
+
+void nghttp2_frame_unpack_priority_spec(nghttp2_priority_spec *pri_spec,
+                                        const uint8_t *payload) {
+  int32_t dep_stream_id;
+  uint8_t exclusive;
+  int32_t weight;
+
+  dep_stream_id = nghttp2_get_uint32(payload) & NGHTTP2_STREAM_ID_MASK;
+  exclusive = (payload[0] & 0x80) > 0;
+  weight = payload[4] + 1;
+
+  nghttp2_priority_spec_init(pri_spec, dep_stream_id, weight, exclusive);
+}
+
+int nghttp2_frame_unpack_headers_payload(nghttp2_headers *frame,
+                                         const uint8_t *payload) {
+  if (frame->hd.flags & NGHTTP2_FLAG_PRIORITY) {
+    nghttp2_frame_unpack_priority_spec(&frame->pri_spec, payload);
+  } else {
+    nghttp2_priority_spec_default_init(&frame->pri_spec);
+  }
+
+  frame->nva = NULL;
+  frame->nvlen = 0;
+
+  return 0;
+}
+
+int nghttp2_frame_pack_priority(nghttp2_bufs *bufs, nghttp2_priority *frame) {
+  nghttp2_buf *buf;
+
+  assert(bufs->head == bufs->cur);
+
+  buf = &bufs->head->buf;
+
+  assert(nghttp2_buf_avail(buf) >= NGHTTP2_PRIORITY_SPECLEN);
+
+  buf->pos -= NGHTTP2_FRAME_HDLEN;
+
+  nghttp2_frame_pack_frame_hd(buf->pos, &frame->hd);
+
+  nghttp2_frame_pack_priority_spec(buf->last, &frame->pri_spec);
+
+  buf->last += NGHTTP2_PRIORITY_SPECLEN;
+
+  return 0;
+}
+
+void nghttp2_frame_unpack_priority_payload(nghttp2_priority *frame,
+                                           const uint8_t *payload) {
+  nghttp2_frame_unpack_priority_spec(&frame->pri_spec, payload);
+}
+
+int nghttp2_frame_pack_rst_stream(nghttp2_bufs *bufs,
+                                  nghttp2_rst_stream *frame) {
+  nghttp2_buf *buf;
+
+  assert(bufs->head == bufs->cur);
+
+  buf = &bufs->head->buf;
+
+  assert(nghttp2_buf_avail(buf) >= 4);
+
+  buf->pos -= NGHTTP2_FRAME_HDLEN;
+
+  nghttp2_frame_pack_frame_hd(buf->pos, &frame->hd);
+
+  nghttp2_put_uint32be(buf->last, frame->error_code);
+  buf->last += 4;
+
+  return 0;
+}
+
+void nghttp2_frame_unpack_rst_stream_payload(nghttp2_rst_stream *frame,
+                                             const uint8_t *payload) {
+  frame->error_code = nghttp2_get_uint32(payload);
+}
+
+int nghttp2_frame_pack_settings(nghttp2_bufs *bufs, nghttp2_settings *frame) {
+  nghttp2_buf *buf;
+
+  assert(bufs->head == bufs->cur);
+
+  buf = &bufs->head->buf;
+
+  if (nghttp2_buf_avail(buf) < frame->hd.length) {
+    return NGHTTP2_ERR_FRAME_SIZE_ERROR;
+  }
+
+  buf->pos -= NGHTTP2_FRAME_HDLEN;
+
+  nghttp2_frame_pack_frame_hd(buf->pos, &frame->hd);
+
+  buf->last +=
+      nghttp2_frame_pack_settings_payload(buf->last, frame->iv, frame->niv);
+
+  return 0;
+}
+
+size_t nghttp2_frame_pack_settings_payload(uint8_t *buf,
+                                           const nghttp2_settings_entry *iv,
+                                           size_t niv) {
+  size_t i;
+  for (i = 0; i < niv; ++i, buf += NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH) {
+    nghttp2_put_uint16be(buf, (uint16_t)iv[i].settings_id);
+    nghttp2_put_uint32be(buf + 2, iv[i].value);
+  }
+  return NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH * niv;
+}
+
+void nghttp2_frame_unpack_settings_payload(nghttp2_settings *frame,
+                                           nghttp2_settings_entry *iv,
+                                           size_t niv) {
+  frame->iv = iv;
+  frame->niv = niv;
+}
+
+void nghttp2_frame_unpack_settings_entry(nghttp2_settings_entry *iv,
+                                         const uint8_t *payload) {
+  iv->settings_id = nghttp2_get_uint16(&payload[0]);
+  iv->value = nghttp2_get_uint32(&payload[2]);
+}
+
+int nghttp2_frame_unpack_settings_payload2(nghttp2_settings_entry **iv_ptr,
+                                           size_t *niv_ptr,
+                                           const uint8_t *payload,
+                                           size_t payloadlen,
+                                           nghttp2_mem *mem) {
+  size_t i;
+
+  *niv_ptr = payloadlen / NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH;
+
+  if (*niv_ptr == 0) {
+    *iv_ptr = NULL;
+
+    return 0;
+  }
+
+  *iv_ptr =
+      nghttp2_mem_malloc(mem, (*niv_ptr) * sizeof(nghttp2_settings_entry));
+
+  if (*iv_ptr == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  for (i = 0; i < *niv_ptr; ++i) {
+    size_t off = i * NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH;
+    nghttp2_frame_unpack_settings_entry(&(*iv_ptr)[i], &payload[off]);
+  }
+
+  return 0;
+}
+
+int nghttp2_frame_pack_push_promise(nghttp2_bufs *bufs,
+                                    nghttp2_push_promise *frame,
+                                    nghttp2_hd_deflater *deflater) {
+  size_t nv_offset = 4;
+  int rv;
+  nghttp2_buf *buf;
+
+  assert(bufs->head == bufs->cur);
+
+  buf = &bufs->cur->buf;
+
+  buf->pos += nv_offset;
+  buf->last = buf->pos;
+
+  /* This call will adjust buf->last to the correct position */
+  rv = nghttp2_hd_deflate_hd_bufs(deflater, bufs, frame->nva, frame->nvlen);
+
+  if (rv == NGHTTP2_ERR_BUFFER_ERROR) {
+    rv = NGHTTP2_ERR_HEADER_COMP;
+  }
+
+  buf->pos -= nv_offset;
+
+  if (rv != 0) {
+    return rv;
+  }
+
+  nghttp2_put_uint32be(buf->pos, (uint32_t)frame->promised_stream_id);
+
+  frame->padlen = 0;
+  frame->hd.length = nghttp2_bufs_len(bufs);
+
+  return frame_pack_headers_shared(bufs, &frame->hd);
+}
+
+int nghttp2_frame_unpack_push_promise_payload(nghttp2_push_promise *frame,
+                                              const uint8_t *payload) {
+  frame->promised_stream_id =
+      nghttp2_get_uint32(payload) & NGHTTP2_STREAM_ID_MASK;
+  frame->nva = NULL;
+  frame->nvlen = 0;
+  return 0;
+}
+
+int nghttp2_frame_pack_ping(nghttp2_bufs *bufs, nghttp2_ping *frame) {
+  nghttp2_buf *buf;
+
+  assert(bufs->head == bufs->cur);
+
+  buf = &bufs->head->buf;
+
+  assert(nghttp2_buf_avail(buf) >= 8);
+
+  buf->pos -= NGHTTP2_FRAME_HDLEN;
+
+  nghttp2_frame_pack_frame_hd(buf->pos, &frame->hd);
+
+  buf->last =
+      nghttp2_cpymem(buf->last, frame->opaque_data, sizeof(frame->opaque_data));
+
+  return 0;
+}
+
+void nghttp2_frame_unpack_ping_payload(nghttp2_ping *frame,
+                                       const uint8_t *payload) {
+  memcpy(frame->opaque_data, payload, sizeof(frame->opaque_data));
+}
+
+int nghttp2_frame_pack_goaway(nghttp2_bufs *bufs, nghttp2_goaway *frame) {
+  int rv;
+  nghttp2_buf *buf;
+
+  assert(bufs->head == bufs->cur);
+
+  buf = &bufs->head->buf;
+
+  buf->pos -= NGHTTP2_FRAME_HDLEN;
+
+  nghttp2_frame_pack_frame_hd(buf->pos, &frame->hd);
+
+  nghttp2_put_uint32be(buf->last, (uint32_t)frame->last_stream_id);
+  buf->last += 4;
+
+  nghttp2_put_uint32be(buf->last, frame->error_code);
+  buf->last += 4;
+
+  rv = nghttp2_bufs_add(bufs, frame->opaque_data, frame->opaque_data_len);
+
+  if (rv == NGHTTP2_ERR_BUFFER_ERROR) {
+    return NGHTTP2_ERR_FRAME_SIZE_ERROR;
+  }
+
+  if (rv != 0) {
+    return rv;
+  }
+
+  return 0;
+}
+
+void nghttp2_frame_unpack_goaway_payload(nghttp2_goaway *frame,
+                                         const uint8_t *payload,
+                                         uint8_t *var_gift_payload,
+                                         size_t var_gift_payloadlen) {
+  frame->last_stream_id = nghttp2_get_uint32(payload) & NGHTTP2_STREAM_ID_MASK;
+  frame->error_code = nghttp2_get_uint32(payload + 4);
+
+  frame->opaque_data = var_gift_payload;
+  frame->opaque_data_len = var_gift_payloadlen;
+}
+
+int nghttp2_frame_unpack_goaway_payload2(nghttp2_goaway *frame,
+                                         const uint8_t *payload,
+                                         size_t payloadlen, nghttp2_mem *mem) {
+  uint8_t *var_gift_payload;
+  size_t var_gift_payloadlen;
+
+  if (payloadlen > 8) {
+    var_gift_payloadlen = payloadlen - 8;
+  } else {
+    var_gift_payloadlen = 0;
+  }
+
+  payloadlen -= var_gift_payloadlen;
+
+  if (!var_gift_payloadlen) {
+    var_gift_payload = NULL;
+  } else {
+    var_gift_payload = nghttp2_mem_malloc(mem, var_gift_payloadlen);
+
+    if (var_gift_payload == NULL) {
+      return NGHTTP2_ERR_NOMEM;
+    }
+
+    memcpy(var_gift_payload, payload + 8, var_gift_payloadlen);
+  }
+
+  nghttp2_frame_unpack_goaway_payload(frame, payload, var_gift_payload,
+                                      var_gift_payloadlen);
+
+  return 0;
+}
+
+int nghttp2_frame_pack_window_update(nghttp2_bufs *bufs,
+                                     nghttp2_window_update *frame) {
+  nghttp2_buf *buf;
+
+  assert(bufs->head == bufs->cur);
+
+  buf = &bufs->head->buf;
+
+  assert(nghttp2_buf_avail(buf) >= 4);
+
+  buf->pos -= NGHTTP2_FRAME_HDLEN;
+
+  nghttp2_frame_pack_frame_hd(buf->pos, &frame->hd);
+
+  nghttp2_put_uint32be(buf->last, (uint32_t)frame->window_size_increment);
+  buf->last += 4;
+
+  return 0;
+}
+
+void nghttp2_frame_unpack_window_update_payload(nghttp2_window_update *frame,
+                                                const uint8_t *payload) {
+  frame->window_size_increment =
+      nghttp2_get_uint32(payload) & NGHTTP2_WINDOW_SIZE_INCREMENT_MASK;
+}
+
+int nghttp2_frame_pack_altsvc(nghttp2_bufs *bufs, nghttp2_extension *frame) {
+  int rv;
+  nghttp2_buf *buf;
+  nghttp2_ext_altsvc *altsvc;
+
+  /* This is required with --disable-assert. */
+  (void)rv;
+
+  altsvc = frame->payload;
+
+  buf = &bufs->head->buf;
+
+  assert(nghttp2_buf_avail(buf) >=
+         2 + altsvc->origin_len + altsvc->field_value_len);
+
+  buf->pos -= NGHTTP2_FRAME_HDLEN;
+
+  nghttp2_frame_pack_frame_hd(buf->pos, &frame->hd);
+
+  nghttp2_put_uint16be(buf->last, (uint16_t)altsvc->origin_len);
+  buf->last += 2;
+
+  rv = nghttp2_bufs_add(bufs, altsvc->origin, altsvc->origin_len);
+
+  assert(rv == 0);
+
+  rv = nghttp2_bufs_add(bufs, altsvc->field_value, altsvc->field_value_len);
+
+  assert(rv == 0);
+
+  return 0;
+}
+
+void nghttp2_frame_unpack_altsvc_payload(nghttp2_extension *frame,
+                                         size_t origin_len, uint8_t *payload,
+                                         size_t payloadlen) {
+  nghttp2_ext_altsvc *altsvc;
+  uint8_t *p;
+
+  altsvc = frame->payload;
+  p = payload;
+
+  altsvc->origin = p;
+
+  p += origin_len;
+
+  altsvc->origin_len = origin_len;
+
+  altsvc->field_value = p;
+  altsvc->field_value_len = (size_t)(payload + payloadlen - p);
+}
+
+int nghttp2_frame_unpack_altsvc_payload2(nghttp2_extension *frame,
+                                         const uint8_t *payload,
+                                         size_t payloadlen, nghttp2_mem *mem) {
+  uint8_t *buf;
+  size_t origin_len;
+
+  if (payloadlen < 2) {
+    return NGHTTP2_FRAME_SIZE_ERROR;
+  }
+
+  origin_len = nghttp2_get_uint16(payload);
+
+  buf = nghttp2_mem_malloc(mem, payloadlen - 2);
+  if (!buf) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  nghttp2_cpymem(buf, payload + 2, payloadlen - 2);
+
+  nghttp2_frame_unpack_altsvc_payload(frame, origin_len, buf, payloadlen - 2);
+
+  return 0;
+}
+
+int nghttp2_frame_pack_origin(nghttp2_bufs *bufs, nghttp2_extension *frame) {
+  nghttp2_buf *buf;
+  nghttp2_ext_origin *origin;
+  nghttp2_origin_entry *orig;
+  size_t i;
+
+  origin = frame->payload;
+
+  buf = &bufs->head->buf;
+
+  if (nghttp2_buf_avail(buf) < frame->hd.length) {
+    return NGHTTP2_ERR_FRAME_SIZE_ERROR;
+  }
+
+  buf->pos -= NGHTTP2_FRAME_HDLEN;
+
+  nghttp2_frame_pack_frame_hd(buf->pos, &frame->hd);
+
+  for (i = 0; i < origin->nov; ++i) {
+    orig = &origin->ov[i];
+    nghttp2_put_uint16be(buf->last, (uint16_t)orig->origin_len);
+    buf->last += 2;
+    buf->last = nghttp2_cpymem(buf->last, orig->origin, orig->origin_len);
+  }
+
+  assert(nghttp2_buf_len(buf) == NGHTTP2_FRAME_HDLEN + frame->hd.length);
+
+  return 0;
+}
+
+int nghttp2_frame_unpack_origin_payload(nghttp2_extension *frame,
+                                        const uint8_t *payload,
+                                        size_t payloadlen, nghttp2_mem *mem) {
+  nghttp2_ext_origin *origin;
+  const uint8_t *p, *end;
+  uint8_t *dst;
+  size_t originlen;
+  nghttp2_origin_entry *ov;
+  size_t nov = 0;
+  size_t len = 0;
+
+  origin = frame->payload;
+  p = payload;
+  end = p + payloadlen;
+
+  for (; p != end;) {
+    if (end - p < 2) {
+      return NGHTTP2_ERR_FRAME_SIZE_ERROR;
+    }
+    originlen = nghttp2_get_uint16(p);
+    p += 2;
+    if (originlen == 0) {
+      continue;
+    }
+    if (originlen > (size_t)(end - p)) {
+      return NGHTTP2_ERR_FRAME_SIZE_ERROR;
+    }
+    p += originlen;
+    /* 1 for terminal NULL */
+    len += originlen + 1;
+    ++nov;
+  }
+
+  if (nov == 0) {
+    origin->ov = NULL;
+    origin->nov = 0;
+
+    return 0;
+  }
+
+  len += nov * sizeof(nghttp2_origin_entry);
+
+  ov = nghttp2_mem_malloc(mem, len);
+  if (ov == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  origin->ov = ov;
+  origin->nov = nov;
+
+  dst = (uint8_t *)ov + nov * sizeof(nghttp2_origin_entry);
+  p = payload;
+
+  for (; p != end;) {
+    originlen = nghttp2_get_uint16(p);
+    p += 2;
+    if (originlen == 0) {
+      continue;
+    }
+    ov->origin = dst;
+    ov->origin_len = originlen;
+    dst = nghttp2_cpymem(dst, p, originlen);
+    *dst++ = '\0';
+    p += originlen;
+    ++ov;
+  }
+
+  return 0;
+}
+
+nghttp2_settings_entry *nghttp2_frame_iv_copy(const nghttp2_settings_entry *iv,
+                                              size_t niv, nghttp2_mem *mem) {
+  nghttp2_settings_entry *iv_copy;
+  size_t len = niv * sizeof(nghttp2_settings_entry);
+
+  if (len == 0) {
+    return NULL;
+  }
+
+  iv_copy = nghttp2_mem_malloc(mem, len);
+
+  if (iv_copy == NULL) {
+    return NULL;
+  }
+
+  memcpy(iv_copy, iv, len);
+
+  return iv_copy;
+}
+
+int nghttp2_nv_equal(const nghttp2_nv *a, const nghttp2_nv *b) {
+  return a->namelen == b->namelen && a->valuelen == b->valuelen &&
+         memcmp(a->name, b->name, a->namelen) == 0 &&
+         memcmp(a->value, b->value, a->valuelen) == 0;
+}
+
+void nghttp2_nv_array_del(nghttp2_nv *nva, nghttp2_mem *mem) {
+  nghttp2_mem_free(mem, nva);
+}
+
+static int bytes_compar(const uint8_t *a, size_t alen, const uint8_t *b,
+                        size_t blen) {
+  int rv;
+
+  if (alen == blen) {
+    return memcmp(a, b, alen);
+  }
+
+  if (alen < blen) {
+    rv = memcmp(a, b, alen);
+
+    if (rv == 0) {
+      return -1;
+    }
+
+    return rv;
+  }
+
+  rv = memcmp(a, b, blen);
+
+  if (rv == 0) {
+    return 1;
+  }
+
+  return rv;
+}
+
+int nghttp2_nv_compare_name(const nghttp2_nv *lhs, const nghttp2_nv *rhs) {
+  return bytes_compar(lhs->name, lhs->namelen, rhs->name, rhs->namelen);
+}
+
+static int nv_compar(const void *lhs, const void *rhs) {
+  const nghttp2_nv *a = (const nghttp2_nv *)lhs;
+  const nghttp2_nv *b = (const nghttp2_nv *)rhs;
+  int rv;
+
+  rv = bytes_compar(a->name, a->namelen, b->name, b->namelen);
+
+  if (rv == 0) {
+    return bytes_compar(a->value, a->valuelen, b->value, b->valuelen);
+  }
+
+  return rv;
+}
+
+void nghttp2_nv_array_sort(nghttp2_nv *nva, size_t nvlen) {
+  qsort(nva, nvlen, sizeof(nghttp2_nv), nv_compar);
+}
+
+int nghttp2_nv_array_copy(nghttp2_nv **nva_ptr, const nghttp2_nv *nva,
+                          size_t nvlen, nghttp2_mem *mem) {
+  size_t i;
+  uint8_t *data = NULL;
+  size_t buflen = 0;
+  nghttp2_nv *p;
+
+  if (nvlen == 0) {
+    *nva_ptr = NULL;
+
+    return 0;
+  }
+
+  for (i = 0; i < nvlen; ++i) {
+    /* + 1 for null-termination */
+    if ((nva[i].flags & NGHTTP2_NV_FLAG_NO_COPY_NAME) == 0) {
+      buflen += nva[i].namelen + 1;
+    }
+    if ((nva[i].flags & NGHTTP2_NV_FLAG_NO_COPY_VALUE) == 0) {
+      buflen += nva[i].valuelen + 1;
+    }
+  }
+
+  buflen += sizeof(nghttp2_nv) * nvlen;
+
+  *nva_ptr = nghttp2_mem_malloc(mem, buflen);
+
+  if (*nva_ptr == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  p = *nva_ptr;
+  data = (uint8_t *)(*nva_ptr) + sizeof(nghttp2_nv) * nvlen;
+
+  for (i = 0; i < nvlen; ++i) {
+    p->flags = nva[i].flags;
+
+    if (nva[i].flags & NGHTTP2_NV_FLAG_NO_COPY_NAME) {
+      p->name = nva[i].name;
+      p->namelen = nva[i].namelen;
+    } else {
+      if (nva[i].namelen) {
+        memcpy(data, nva[i].name, nva[i].namelen);
+      }
+      p->name = data;
+      p->namelen = nva[i].namelen;
+      data[p->namelen] = '\0';
+      nghttp2_downcase(p->name, p->namelen);
+      data += nva[i].namelen + 1;
+    }
+
+    if (nva[i].flags & NGHTTP2_NV_FLAG_NO_COPY_VALUE) {
+      p->value = nva[i].value;
+      p->valuelen = nva[i].valuelen;
+    } else {
+      if (nva[i].valuelen) {
+        memcpy(data, nva[i].value, nva[i].valuelen);
+      }
+      p->value = data;
+      p->valuelen = nva[i].valuelen;
+      data[p->valuelen] = '\0';
+      data += nva[i].valuelen + 1;
+    }
+
+    ++p;
+  }
+  return 0;
+}
+
+int nghttp2_iv_check(const nghttp2_settings_entry *iv, size_t niv) {
+  size_t i;
+  for (i = 0; i < niv; ++i) {
+    switch (iv[i].settings_id) {
+    case NGHTTP2_SETTINGS_HEADER_TABLE_SIZE:
+      break;
+    case NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS:
+      break;
+    case NGHTTP2_SETTINGS_ENABLE_PUSH:
+      if (iv[i].value != 0 && iv[i].value != 1) {
+        return 0;
+      }
+      break;
+    case NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE:
+      if (iv[i].value > (uint32_t)NGHTTP2_MAX_WINDOW_SIZE) {
+        return 0;
+      }
+      break;
+    case NGHTTP2_SETTINGS_MAX_FRAME_SIZE:
+      if (iv[i].value < NGHTTP2_MAX_FRAME_SIZE_MIN ||
+          iv[i].value > NGHTTP2_MAX_FRAME_SIZE_MAX) {
+        return 0;
+      }
+      break;
+    case NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE:
+      break;
+    case NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL:
+      if (iv[i].value != 0 && iv[i].value != 1) {
+        return 0;
+      }
+      break;
+    }
+  }
+  return 1;
+}
+
+static void frame_set_pad(nghttp2_buf *buf, size_t padlen, int framehd_only) {
+  size_t trail_padlen;
+  size_t newlen;
+
+  DEBUGF("send: padlen=%zu, shift left 1 bytes\n", padlen);
+
+  memmove(buf->pos - 1, buf->pos, NGHTTP2_FRAME_HDLEN);
+
+  --buf->pos;
+
+  buf->pos[4] |= NGHTTP2_FLAG_PADDED;
+
+  newlen = (nghttp2_get_uint32(buf->pos) >> 8) + padlen;
+  nghttp2_put_uint32be(buf->pos, (uint32_t)((newlen << 8) + buf->pos[3]));
+
+  if (framehd_only) {
+    return;
+  }
+
+  trail_padlen = padlen - 1;
+  buf->pos[NGHTTP2_FRAME_HDLEN] = (uint8_t)trail_padlen;
+
+  /* zero out padding */
+  memset(buf->last, 0, trail_padlen);
+  /* extend buffers trail_padlen bytes, since we ate previous padlen -
+     trail_padlen byte(s) */
+  buf->last += trail_padlen;
+}
+
+int nghttp2_frame_add_pad(nghttp2_bufs *bufs, nghttp2_frame_hd *hd,
+                          size_t padlen, int framehd_only) {
+  nghttp2_buf *buf;
+
+  if (padlen == 0) {
+    DEBUGF("send: padlen = 0, nothing to do\n");
+
+    return 0;
+  }
+
+  /*
+   * We have arranged bufs like this:
+   *
+   *  0                   1                   2                   3
+   *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * | |Frame header     | Frame payload...                          :
+   * +-+-----------------+-------------------------------------------+
+   * | |Frame header     | Frame payload...                          :
+   * +-+-----------------+-------------------------------------------+
+   * | |Frame header     | Frame payload...                          :
+   * +-+-----------------+-------------------------------------------+
+   *
+   * We arranged padding so that it is included in the first frame
+   * completely.  For padded frame, we are going to adjust buf->pos of
+   * frame which includes padding and serialize (memmove) frame header
+   * in the correct position.  Also extends buf->last to include
+   * padding.
+   */
+
+  buf = &bufs->head->buf;
+
+  assert(nghttp2_buf_avail(buf) >= padlen - 1);
+
+  frame_set_pad(buf, padlen, framehd_only);
+
+  hd->length += padlen;
+  hd->flags |= NGHTTP2_FLAG_PADDED;
+
+  DEBUGF("send: final payloadlen=%zu, padlen=%zu\n", hd->length, padlen);
+
+  return 0;
+}

lib/nghttp2_frame.h

@@ -0,0 +1,624 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_FRAME_H
+#define NGHTTP2_FRAME_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+#include "nghttp2_hd.h"
+#include "nghttp2_buf.h"
+
+#define NGHTTP2_STREAM_ID_MASK ((1u << 31) - 1)
+#define NGHTTP2_PRI_GROUP_ID_MASK ((1u << 31) - 1)
+#define NGHTTP2_PRIORITY_MASK ((1u << 31) - 1)
+#define NGHTTP2_WINDOW_SIZE_INCREMENT_MASK ((1u << 31) - 1)
+#define NGHTTP2_SETTINGS_ID_MASK ((1 << 24) - 1)
+
+/* The number of bytes of frame header. */
+#define NGHTTP2_FRAME_HDLEN 9
+
+#define NGHTTP2_MAX_FRAME_SIZE_MAX ((1 << 24) - 1)
+#define NGHTTP2_MAX_FRAME_SIZE_MIN (1 << 14)
+
+#define NGHTTP2_MAX_PAYLOADLEN 16384
+/* The one frame buffer length for tranmission.  We may use several of
+   them to support CONTINUATION.  To account for Pad Length field, we
+   allocate extra 1 byte, which saves extra large memcopying. */
+#define NGHTTP2_FRAMEBUF_CHUNKLEN                                              \
+  (NGHTTP2_FRAME_HDLEN + 1 + NGHTTP2_MAX_PAYLOADLEN)
+
+/* The default length of DATA frame payload. */
+#define NGHTTP2_DATA_PAYLOADLEN NGHTTP2_MAX_FRAME_SIZE_MIN
+
+/* Maximum headers block size to send, calculated using
+   nghttp2_hd_deflate_bound().  This is the default value, and can be
+   overridden by nghttp2_option_set_max_send_header_block_size(). */
+#define NGHTTP2_MAX_HEADERSLEN 65536
+
+/* The number of bytes for each SETTINGS entry */
+#define NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH 6
+
+/* Length of priority related fields in HEADERS/PRIORITY frames */
+#define NGHTTP2_PRIORITY_SPECLEN 5
+
+/* Maximum length of padding in bytes. */
+#define NGHTTP2_MAX_PADLEN 256
+
+/* Union of extension frame payload */
+typedef union {
+  nghttp2_ext_altsvc altsvc;
+  nghttp2_ext_origin origin;
+} nghttp2_ext_frame_payload;
+
+void nghttp2_frame_pack_frame_hd(uint8_t *buf, const nghttp2_frame_hd *hd);
+
+void nghttp2_frame_unpack_frame_hd(nghttp2_frame_hd *hd, const uint8_t *buf);
+
+/**
+ * Initializes frame header |hd| with given parameters.  Reserved bit
+ * is set to 0.
+ */
+void nghttp2_frame_hd_init(nghttp2_frame_hd *hd, size_t length, uint8_t type,
+                           uint8_t flags, int32_t stream_id);
+
+/**
+ * Returns the number of priority field depending on the |flags|.  If
+ * |flags| has neither NGHTTP2_FLAG_PRIORITY_GROUP nor
+ * NGHTTP2_FLAG_PRIORITY_DEPENDENCY set, return 0.
+ */
+size_t nghttp2_frame_priority_len(uint8_t flags);
+
+/**
+ * Packs the |pri_spec| in |buf|.  This function assumes |buf| has
+ * enough space for serialization.
+ */
+void nghttp2_frame_pack_priority_spec(uint8_t *buf,
+                                      const nghttp2_priority_spec *pri_spec);
+
+/**
+ * Unpacks the priority specification from payload |payload| of length
+ * |payloadlen| to |pri_spec|.  The |flags| is used to determine what
+ * kind of priority specification is in |payload|.  This function
+ * assumes the |payload| contains whole priority specification.
+ */
+void nghttp2_frame_unpack_priority_spec(nghttp2_priority_spec *pri_spec,
+                                        const uint8_t *payload);
+
+/*
+ * Returns the offset from the HEADERS frame payload where the
+ * compressed header block starts. The frame payload does not include
+ * frame header.
+ */
+size_t nghttp2_frame_headers_payload_nv_offset(nghttp2_headers *frame);
+
+/*
+ * Packs HEADERS frame |frame| in wire format and store it in |bufs|.
+ * This function expands |bufs| as necessary to store frame.
+ *
+ * The caller must make sure that nghttp2_bufs_reset(bufs) is called
+ * before calling this function.
+ *
+ * frame->hd.length is assigned after length is determined during
+ * packing process.  CONTINUATION frames are also serialized in this
+ * function. This function does not handle padding.
+ *
+ * This function returns 0 if it succeeds, or returns one of the
+ * following negative error codes:
+ *
+ * NGHTTP2_ERR_HEADER_COMP
+ *     The deflate operation failed.
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ */
+int nghttp2_frame_pack_headers(nghttp2_bufs *bufs, nghttp2_headers *frame,
+                               nghttp2_hd_deflater *deflater);
+
+/*
+ * Unpacks HEADERS frame byte sequence into |frame|.  This function
+ * only unapcks bytes that come before name/value header block and
+ * after possible Pad Length field.
+ *
+ * This function always succeeds and returns 0.
+ */
+int nghttp2_frame_unpack_headers_payload(nghttp2_headers *frame,
+                                         const uint8_t *payload);
+
+/*
+ * Packs PRIORITY frame |frame| in wire format and store it in
+ * |bufs|.
+ *
+ * The caller must make sure that nghttp2_bufs_reset(bufs) is called
+ * before calling this function.
+ *
+ * This function always succeeds and returns 0.
+ */
+int nghttp2_frame_pack_priority(nghttp2_bufs *bufs, nghttp2_priority *frame);
+
+/*
+ * Unpacks PRIORITY wire format into |frame|.
+ */
+void nghttp2_frame_unpack_priority_payload(nghttp2_priority *frame,
+                                           const uint8_t *payload);
+
+/*
+ * Packs RST_STREAM frame |frame| in wire frame format and store it in
+ * |bufs|.
+ *
+ * The caller must make sure that nghttp2_bufs_reset(bufs) is called
+ * before calling this function.
+ *
+ * This function always succeeds and returns 0.
+ */
+int nghttp2_frame_pack_rst_stream(nghttp2_bufs *bufs,
+                                  nghttp2_rst_stream *frame);
+
+/*
+ * Unpacks RST_STREAM frame byte sequence into |frame|.
+ */
+void nghttp2_frame_unpack_rst_stream_payload(nghttp2_rst_stream *frame,
+                                             const uint8_t *payload);
+
+/*
+ * Packs SETTINGS frame |frame| in wire format and store it in
+ * |bufs|.
+ *
+ * The caller must make sure that nghttp2_bufs_reset(bufs) is called
+ * before calling this function.
+ *
+ * This function returns 0 if it succeeds, or returns one of the
+ * following negative error codes:
+ *
+ * NGHTTP2_ERR_FRAME_SIZE_ERROR
+ *     The length of the frame is too large.
+ */
+int nghttp2_frame_pack_settings(nghttp2_bufs *bufs, nghttp2_settings *frame);
+
+/*
+ * Packs the |iv|, which includes |niv| entries, in the |buf|,
+ * assuming the |buf| has at least 8 * |niv| bytes.
+ *
+ * Returns the number of bytes written into the |buf|.
+ */
+size_t nghttp2_frame_pack_settings_payload(uint8_t *buf,
+                                           const nghttp2_settings_entry *iv,
+                                           size_t niv);
+
+void nghttp2_frame_unpack_settings_entry(nghttp2_settings_entry *iv,
+                                         const uint8_t *payload);
+
+/*
+ * Initializes payload of frame->settings.  The |frame| takes
+ * ownership of |iv|.
+ */
+void nghttp2_frame_unpack_settings_payload(nghttp2_settings *frame,
+                                           nghttp2_settings_entry *iv,
+                                           size_t niv);
+
+/*
+ * Unpacks SETTINGS payload into |*iv_ptr|. The number of entries are
+ * assigned to the |*niv_ptr|. This function allocates enough memory
+ * to store the result in |*iv_ptr|. The caller is responsible to free
+ * |*iv_ptr| after its use.
+ *
+ * This function returns 0 if it succeeds or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ */
+int nghttp2_frame_unpack_settings_payload2(nghttp2_settings_entry **iv_ptr,
+                                           size_t *niv_ptr,
+                                           const uint8_t *payload,
+                                           size_t payloadlen, nghttp2_mem *mem);
+
+/*
+ * Packs PUSH_PROMISE frame |frame| in wire format and store it in
+ * |bufs|.  This function expands |bufs| as necessary to store
+ * frame.
+ *
+ * The caller must make sure that nghttp2_bufs_reset(bufs) is called
+ * before calling this function.
+ *
+ * frame->hd.length is assigned after length is determined during
+ * packing process.  CONTINUATION frames are also serialized in this
+ * function. This function does not handle padding.
+ *
+ * This function returns 0 if it succeeds, or returns one of the
+ * following negative error codes:
+ *
+ * NGHTTP2_ERR_HEADER_COMP
+ *     The deflate operation failed.
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ */
+int nghttp2_frame_pack_push_promise(nghttp2_bufs *bufs,
+                                    nghttp2_push_promise *frame,
+                                    nghttp2_hd_deflater *deflater);
+
+/*
+ * Unpacks PUSH_PROMISE frame byte sequence into |frame|.  This
+ * function only unapcks bytes that come before name/value header
+ * block and after possible Pad Length field.
+ *
+ * This function returns 0 if it succeeds or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_PROTO
+ *     TODO END_HEADERS flag is not set
+ */
+int nghttp2_frame_unpack_push_promise_payload(nghttp2_push_promise *frame,
+                                              const uint8_t *payload);
+
+/*
+ * Packs PING frame |frame| in wire format and store it in
+ * |bufs|.
+ *
+ * The caller must make sure that nghttp2_bufs_reset(bufs) is called
+ * before calling this function.
+ *
+ * This function always succeeds and returns 0.
+ */
+int nghttp2_frame_pack_ping(nghttp2_bufs *bufs, nghttp2_ping *frame);
+
+/*
+ * Unpacks PING wire format into |frame|.
+ */
+void nghttp2_frame_unpack_ping_payload(nghttp2_ping *frame,
+                                       const uint8_t *payload);
+
+/*
+ * Packs GOAWAY frame |frame| in wire format and store it in |bufs|.
+ * This function expands |bufs| as necessary to store frame.
+ *
+ * The caller must make sure that nghttp2_bufs_reset(bufs) is called
+ * before calling this function.
+ *
+ * This function returns 0 if it succeeds or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_FRAME_SIZE_ERROR
+ *     The length of the frame is too large.
+ */
+int nghttp2_frame_pack_goaway(nghttp2_bufs *bufs, nghttp2_goaway *frame);
+
+/*
+ * Unpacks GOAWAY wire format into |frame|.  The |payload| of length
+ * |payloadlen| contains first 8 bytes of payload.  The
+ * |var_gift_payload| of length |var_gift_payloadlen| contains
+ * remaining payload and its buffer is gifted to the function and then
+ * |frame|.  The |var_gift_payloadlen| must be freed by
+ * nghttp2_frame_goaway_free().
+ */
+void nghttp2_frame_unpack_goaway_payload(nghttp2_goaway *frame,
+                                         const uint8_t *payload,
+                                         uint8_t *var_gift_payload,
+                                         size_t var_gift_payloadlen);
+
+/*
+ * Unpacks GOAWAY wire format into |frame|.  This function only exists
+ * for unit test.  After allocating buffer for debug data, this
+ * function internally calls nghttp2_frame_unpack_goaway_payload().
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ */
+int nghttp2_frame_unpack_goaway_payload2(nghttp2_goaway *frame,
+                                         const uint8_t *payload,
+                                         size_t payloadlen, nghttp2_mem *mem);
+
+/*
+ * Packs WINDOW_UPDATE frame |frame| in wire frame format and store it
+ * in |bufs|.
+ *
+ * The caller must make sure that nghttp2_bufs_reset(bufs) is called
+ * before calling this function.
+ *
+ * This function always succeeds and returns 0.
+ */
+int nghttp2_frame_pack_window_update(nghttp2_bufs *bufs,
+                                     nghttp2_window_update *frame);
+
+/*
+ * Unpacks WINDOW_UPDATE frame byte sequence into |frame|.
+ */
+void nghttp2_frame_unpack_window_update_payload(nghttp2_window_update *frame,
+                                                const uint8_t *payload);
+
+/*
+ * Packs ALTSVC frame |frame| in wire frame format and store it in
+ * |bufs|.
+ *
+ * The caller must make sure that nghttp2_bufs_reset(bufs) is called
+ * before calling this function.
+ *
+ * This function always succeeds and returns 0.
+ */
+int nghttp2_frame_pack_altsvc(nghttp2_bufs *bufs, nghttp2_extension *ext);
+
+/*
+ * Unpacks ALTSVC wire format into |frame|.  The |payload| of
+ * |payloadlen| bytes contains frame payload.  This function assumes
+ * that frame->payload points to the nghttp2_ext_altsvc object.
+ *
+ * This function always succeeds and returns 0.
+ */
+void nghttp2_frame_unpack_altsvc_payload(nghttp2_extension *frame,
+                                         size_t origin_len, uint8_t *payload,
+                                         size_t payloadlen);
+
+/*
+ * Unpacks ALTSVC wire format into |frame|.  This function only exists
+ * for unit test.  After allocating buffer for fields, this function
+ * internally calls nghttp2_frame_unpack_altsvc_payload().
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_FRAME_SIZE_ERROR
+ *     The payload is too small.
+ */
+int nghttp2_frame_unpack_altsvc_payload2(nghttp2_extension *frame,
+                                         const uint8_t *payload,
+                                         size_t payloadlen, nghttp2_mem *mem);
+
+/*
+ * Packs ORIGIN frame |frame| in wire frame format and store it in
+ * |bufs|.
+ *
+ * The caller must make sure that nghttp2_bufs_reset(bufs) is called
+ * before calling this function.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_FRAME_SIZE_ERROR
+ *     The length of the frame is too large.
+ */
+int nghttp2_frame_pack_origin(nghttp2_bufs *bufs, nghttp2_extension *ext);
+
+/*
+ * Unpacks ORIGIN wire format into |frame|.  The |payload| of length
+ * |payloadlen| contains the frame payload.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_FRAME_SIZE_ERROR
+ *     The payload is too small.
+ */
+int nghttp2_frame_unpack_origin_payload(nghttp2_extension *frame,
+                                        const uint8_t *payload,
+                                        size_t payloadlen, nghttp2_mem *mem);
+/*
+ * Initializes HEADERS frame |frame| with given values.  |frame| takes
+ * ownership of |nva|, so caller must not free it. If |stream_id| is
+ * not assigned yet, it must be -1.
+ */
+void nghttp2_frame_headers_init(nghttp2_headers *frame, uint8_t flags,
+                                int32_t stream_id, nghttp2_headers_category cat,
+                                const nghttp2_priority_spec *pri_spec,
+                                nghttp2_nv *nva, size_t nvlen);
+
+void nghttp2_frame_headers_free(nghttp2_headers *frame, nghttp2_mem *mem);
+
+void nghttp2_frame_priority_init(nghttp2_priority *frame, int32_t stream_id,
+                                 const nghttp2_priority_spec *pri_spec);
+
+void nghttp2_frame_priority_free(nghttp2_priority *frame);
+
+void nghttp2_frame_rst_stream_init(nghttp2_rst_stream *frame, int32_t stream_id,
+                                   uint32_t error_code);
+
+void nghttp2_frame_rst_stream_free(nghttp2_rst_stream *frame);
+
+/*
+ * Initializes PUSH_PROMISE frame |frame| with given values.  |frame|
+ * takes ownership of |nva|, so caller must not free it.
+ */
+void nghttp2_frame_push_promise_init(nghttp2_push_promise *frame, uint8_t flags,
+                                     int32_t stream_id,
+                                     int32_t promised_stream_id,
+                                     nghttp2_nv *nva, size_t nvlen);
+
+void nghttp2_frame_push_promise_free(nghttp2_push_promise *frame,
+                                     nghttp2_mem *mem);
+
+/*
+ * Initializes SETTINGS frame |frame| with given values. |frame| takes
+ * ownership of |iv|, so caller must not free it. The |flags| are
+ * bitwise-OR of one or more of nghttp2_settings_flag.
+ */
+void nghttp2_frame_settings_init(nghttp2_settings *frame, uint8_t flags,
+                                 nghttp2_settings_entry *iv, size_t niv);
+
+void nghttp2_frame_settings_free(nghttp2_settings *frame, nghttp2_mem *mem);
+
+/*
+ * Initializes PING frame |frame| with given values. If the
+ * |opqeue_data| is not NULL, it must point to 8 bytes memory region
+ * of data. The data pointed by |opaque_data| is copied. It can be
+ * NULL. In this case, 8 bytes NULL is used.
+ */
+void nghttp2_frame_ping_init(nghttp2_ping *frame, uint8_t flags,
+                             const uint8_t *opque_data);
+
+void nghttp2_frame_ping_free(nghttp2_ping *frame);
+
+/*
+ * Initializes GOAWAY frame |frame| with given values. On success,
+ * this function takes ownership of |opaque_data|, so caller must not
+ * free it. If the |opaque_data_len| is 0, opaque_data could be NULL.
+ */
+void nghttp2_frame_goaway_init(nghttp2_goaway *frame, int32_t last_stream_id,
+                               uint32_t error_code, uint8_t *opaque_data,
+                               size_t opaque_data_len);
+
+void nghttp2_frame_goaway_free(nghttp2_goaway *frame, nghttp2_mem *mem);
+
+void nghttp2_frame_window_update_init(nghttp2_window_update *frame,
+                                      uint8_t flags, int32_t stream_id,
+                                      int32_t window_size_increment);
+
+void nghttp2_frame_window_update_free(nghttp2_window_update *frame);
+
+void nghttp2_frame_extension_init(nghttp2_extension *frame, uint8_t type,
+                                  uint8_t flags, int32_t stream_id,
+                                  void *payload);
+
+void nghttp2_frame_extension_free(nghttp2_extension *frame);
+
+/*
+ * Initializes ALTSVC frame |frame| with given values.  This function
+ * assumes that frame->payload points to nghttp2_ext_altsvc object.
+ * Also |origin| and |field_value| are allocated in single buffer,
+ * starting |origin|.  On success, this function takes ownership of
+ * |origin|, so caller must not free it.
+ */
+void nghttp2_frame_altsvc_init(nghttp2_extension *frame, int32_t stream_id,
+                               uint8_t *origin, size_t origin_len,
+                               uint8_t *field_value, size_t field_value_len);
+
+/*
+ * Frees up resources under |frame|.  This function does not free
+ * nghttp2_ext_altsvc object pointed by frame->payload.  This function
+ * only frees origin pointed by nghttp2_ext_altsvc.origin.  Therefore,
+ * other fields must be allocated in the same buffer with origin.
+ */
+void nghttp2_frame_altsvc_free(nghttp2_extension *frame, nghttp2_mem *mem);
+
+/*
+ * Initializes ORIGIN frame |frame| with given values.  This function
+ * assumes that frame->payload points to nghttp2_ext_origin object.
+ * Also |ov| and the memory pointed by the field of its elements are
+ * allocated in single buffer, starting with |ov|.  On success, this
+ * function takes ownership of |ov|, so caller must not free it.
+ */
+void nghttp2_frame_origin_init(nghttp2_extension *frame,
+                               nghttp2_origin_entry *ov, size_t nov);
+
+/*
+ * Frees up resources under |frame|.  This function does not free
+ * nghttp2_ext_origin object pointed by frame->payload.  This function
+ * only frees nghttp2_ext_origin.ov.  Therefore, other fields must be
+ * allocated in the same buffer with ov.
+ */
+void nghttp2_frame_origin_free(nghttp2_extension *frame, nghttp2_mem *mem);
+
+/*
+ * Returns the number of padding bytes after payload.  The total
+ * padding length is given in the |padlen|.  The returned value does
+ * not include the Pad Length field.  If |padlen| is 0, this function
+ * returns 0, regardless of frame->hd.flags.
+ */
+size_t nghttp2_frame_trail_padlen(nghttp2_frame *frame, size_t padlen);
+
+void nghttp2_frame_data_init(nghttp2_data *frame, uint8_t flags,
+                             int32_t stream_id);
+
+void nghttp2_frame_data_free(nghttp2_data *frame);
+
+/*
+ * Makes copy of |iv| and return the copy. The |niv| is the number of
+ * entries in |iv|. This function returns the pointer to the copy if
+ * it succeeds, or NULL.
+ */
+nghttp2_settings_entry *nghttp2_frame_iv_copy(const nghttp2_settings_entry *iv,
+                                              size_t niv, nghttp2_mem *mem);
+
+/*
+ * Sorts the |nva| in ascending order of name and value. If names are
+ * equivalent, sort them by value.
+ */
+void nghttp2_nv_array_sort(nghttp2_nv *nva, size_t nvlen);
+
+/*
+ * Copies name/value pairs from |nva|, which contains |nvlen| pairs,
+ * to |*nva_ptr|, which is dynamically allocated so that all items can
+ * be stored.  The resultant name and value in nghttp2_nv are
+ * guaranteed to be NULL-terminated even if the input is not
+ * null-terminated.
+ *
+ * The |*nva_ptr| must be freed using nghttp2_nv_array_del().
+ *
+ * This function returns 0 if it succeeds or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ */
+int nghttp2_nv_array_copy(nghttp2_nv **nva_ptr, const nghttp2_nv *nva,
+                          size_t nvlen, nghttp2_mem *mem);
+
+/*
+ * Returns nonzero if the name/value pair |a| equals to |b|. The name
+ * is compared in case-sensitive, because we ensure that this function
+ * is called after the name is lower-cased.
+ */
+int nghttp2_nv_equal(const nghttp2_nv *a, const nghttp2_nv *b);
+
+/*
+ * Frees |nva|.
+ */
+void nghttp2_nv_array_del(nghttp2_nv *nva, nghttp2_mem *mem);
+
+/*
+ * Checks that the |iv|, which includes |niv| entries, does not have
+ * invalid values.
+ *
+ * This function returns nonzero if it succeeds, or 0.
+ */
+int nghttp2_iv_check(const nghttp2_settings_entry *iv, size_t niv);
+
+/*
+ * Sets Pad Length field and flags and adjusts frame header position
+ * of each buffers in |bufs|.  The number of padding is given in the
+ * |padlen| including Pad Length field.  The |hd| is the frame header
+ * for the serialized data.  This function fills zeros padding region
+ * unless framehd_only is nonzero.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_FRAME_SIZE_ERROR
+ *     The length of the resulting frame is too large.
+ */
+int nghttp2_frame_add_pad(nghttp2_bufs *bufs, nghttp2_frame_hd *hd,
+                          size_t padlen, int framehd_only);
+
+#endif /* NGHTTP2_FRAME_H */

lib/nghttp2_hd.c

@@ -0,0 +1,2351 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2013 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_hd.h"
+
+#include <string.h>
+#include <assert.h>
+#include <stdio.h>
+
+#include "nghttp2_helper.h"
+#include "nghttp2_int.h"
+#include "nghttp2_debug.h"
+
+/* Make scalar initialization form of nghttp2_hd_entry */
+#define MAKE_STATIC_ENT(N, V, T, H)                                            \
+  {                                                                            \
+    {NULL, NULL, (uint8_t *)(N), sizeof((N)) - 1, -1},                         \
+        {NULL, NULL, (uint8_t *)(V), sizeof((V)) - 1, -1},                     \
+        {(uint8_t *)(N), (uint8_t *)(V), sizeof((N)) - 1, sizeof((V)) - 1, 0}, \
+        T, H                                                                   \
+  }
+
+/* Generated by mkstatictbl.py */
+/* 3rd parameter is nghttp2_token value for header field name.  We use
+   first enum value if same header names are repeated (e.g.,
+   :status). */
+static const nghttp2_hd_static_entry static_table[] = {
+    MAKE_STATIC_ENT(":authority", "", 0, 3153725150u),
+    MAKE_STATIC_ENT(":method", "GET", 1, 695666056u),
+    MAKE_STATIC_ENT(":method", "POST", 1, 695666056u),
+    MAKE_STATIC_ENT(":path", "/", 3, 3292848686u),
+    MAKE_STATIC_ENT(":path", "/index.html", 3, 3292848686u),
+    MAKE_STATIC_ENT(":scheme", "http", 5, 2510477674u),
+    MAKE_STATIC_ENT(":scheme", "https", 5, 2510477674u),
+    MAKE_STATIC_ENT(":status", "200", 7, 4000288983u),
+    MAKE_STATIC_ENT(":status", "204", 7, 4000288983u),
+    MAKE_STATIC_ENT(":status", "206", 7, 4000288983u),
+    MAKE_STATIC_ENT(":status", "304", 7, 4000288983u),
+    MAKE_STATIC_ENT(":status", "400", 7, 4000288983u),
+    MAKE_STATIC_ENT(":status", "404", 7, 4000288983u),
+    MAKE_STATIC_ENT(":status", "500", 7, 4000288983u),
+    MAKE_STATIC_ENT("accept-charset", "", 14, 3664010344u),
+    MAKE_STATIC_ENT("accept-encoding", "gzip, deflate", 15, 3379649177u),
+    MAKE_STATIC_ENT("accept-language", "", 16, 1979086614u),
+    MAKE_STATIC_ENT("accept-ranges", "", 17, 1713753958u),
+    MAKE_STATIC_ENT("accept", "", 18, 136609321u),
+    MAKE_STATIC_ENT("access-control-allow-origin", "", 19, 2710797292u),
+    MAKE_STATIC_ENT("age", "", 20, 742476188u),
+    MAKE_STATIC_ENT("allow", "", 21, 2930878514u),
+    MAKE_STATIC_ENT("authorization", "", 22, 2436257726u),
+    MAKE_STATIC_ENT("cache-control", "", 23, 1355326669u),
+    MAKE_STATIC_ENT("content-disposition", "", 24, 3889184348u),
+    MAKE_STATIC_ENT("content-encoding", "", 25, 65203592u),
+    MAKE_STATIC_ENT("content-language", "", 26, 24973587u),
+    MAKE_STATIC_ENT("content-length", "", 27, 1308181789u),
+    MAKE_STATIC_ENT("content-location", "", 28, 2302364718u),
+    MAKE_STATIC_ENT("content-range", "", 29, 3555523146u),
+    MAKE_STATIC_ENT("content-type", "", 30, 4244048277u),
+    MAKE_STATIC_ENT("cookie", "", 31, 2007449791u),
+    MAKE_STATIC_ENT("date", "", 32, 3564297305u),
+    MAKE_STATIC_ENT("etag", "", 33, 113792960u),
+    MAKE_STATIC_ENT("expect", "", 34, 2530896728u),
+    MAKE_STATIC_ENT("expires", "", 35, 1049544579u),
+    MAKE_STATIC_ENT("from", "", 36, 2513272949u),
+    MAKE_STATIC_ENT("host", "", 37, 2952701295u),
+    MAKE_STATIC_ENT("if-match", "", 38, 3597694698u),
+    MAKE_STATIC_ENT("if-modified-since", "", 39, 2213050793u),
+    MAKE_STATIC_ENT("if-none-match", "", 40, 2536202615u),
+    MAKE_STATIC_ENT("if-range", "", 41, 2340978238u),
+    MAKE_STATIC_ENT("if-unmodified-since", "", 42, 3794814858u),
+    MAKE_STATIC_ENT("last-modified", "", 43, 3226950251u),
+    MAKE_STATIC_ENT("link", "", 44, 232457833u),
+    MAKE_STATIC_ENT("location", "", 45, 200649126u),
+    MAKE_STATIC_ENT("max-forwards", "", 46, 1826162134u),
+    MAKE_STATIC_ENT("proxy-authenticate", "", 47, 2709445359u),
+    MAKE_STATIC_ENT("proxy-authorization", "", 48, 2686392507u),
+    MAKE_STATIC_ENT("range", "", 49, 4208725202u),
+    MAKE_STATIC_ENT("referer", "", 50, 3969579366u),
+    MAKE_STATIC_ENT("refresh", "", 51, 3572655668u),
+    MAKE_STATIC_ENT("retry-after", "", 52, 3336180598u),
+    MAKE_STATIC_ENT("server", "", 53, 1085029842u),
+    MAKE_STATIC_ENT("set-cookie", "", 54, 1848371000u),
+    MAKE_STATIC_ENT("strict-transport-security", "", 55, 4138147361u),
+    MAKE_STATIC_ENT("transfer-encoding", "", 56, 3719590988u),
+    MAKE_STATIC_ENT("user-agent", "", 57, 606444526u),
+    MAKE_STATIC_ENT("vary", "", 58, 1085005381u),
+    MAKE_STATIC_ENT("via", "", 59, 1762798611u),
+    MAKE_STATIC_ENT("www-authenticate", "", 60, 779865858u),
+};
+
+static int memeq(const void *s1, const void *s2, size_t n) {
+  return memcmp(s1, s2, n) == 0;
+}
+
+/*
+ * This function was generated by genlibtokenlookup.py.  Inspired by
+ * h2o header lookup.  https://github.com/h2o/h2o
+ */
+static int32_t lookup_token(const uint8_t *name, size_t namelen) {
+  switch (namelen) {
+  case 2:
+    switch (name[1]) {
+    case 'e':
+      if (memeq("t", name, 1)) {
+        return NGHTTP2_TOKEN_TE;
+      }
+      break;
+    }
+    break;
+  case 3:
+    switch (name[2]) {
+    case 'a':
+      if (memeq("vi", name, 2)) {
+        return NGHTTP2_TOKEN_VIA;
+      }
+      break;
+    case 'e':
+      if (memeq("ag", name, 2)) {
+        return NGHTTP2_TOKEN_AGE;
+      }
+      break;
+    }
+    break;
+  case 4:
+    switch (name[3]) {
+    case 'e':
+      if (memeq("dat", name, 3)) {
+        return NGHTTP2_TOKEN_DATE;
+      }
+      break;
+    case 'g':
+      if (memeq("eta", name, 3)) {
+        return NGHTTP2_TOKEN_ETAG;
+      }
+      break;
+    case 'k':
+      if (memeq("lin", name, 3)) {
+        return NGHTTP2_TOKEN_LINK;
+      }
+      break;
+    case 'm':
+      if (memeq("fro", name, 3)) {
+        return NGHTTP2_TOKEN_FROM;
+      }
+      break;
+    case 't':
+      if (memeq("hos", name, 3)) {
+        return NGHTTP2_TOKEN_HOST;
+      }
+      break;
+    case 'y':
+      if (memeq("var", name, 3)) {
+        return NGHTTP2_TOKEN_VARY;
+      }
+      break;
+    }
+    break;
+  case 5:
+    switch (name[4]) {
+    case 'e':
+      if (memeq("rang", name, 4)) {
+        return NGHTTP2_TOKEN_RANGE;
+      }
+      break;
+    case 'h':
+      if (memeq(":pat", name, 4)) {
+        return NGHTTP2_TOKEN__PATH;
+      }
+      break;
+    case 'w':
+      if (memeq("allo", name, 4)) {
+        return NGHTTP2_TOKEN_ALLOW;
+      }
+      break;
+    }
+    break;
+  case 6:
+    switch (name[5]) {
+    case 'e':
+      if (memeq("cooki", name, 5)) {
+        return NGHTTP2_TOKEN_COOKIE;
+      }
+      break;
+    case 'r':
+      if (memeq("serve", name, 5)) {
+        return NGHTTP2_TOKEN_SERVER;
+      }
+      break;
+    case 't':
+      if (memeq("accep", name, 5)) {
+        return NGHTTP2_TOKEN_ACCEPT;
+      }
+      if (memeq("expec", name, 5)) {
+        return NGHTTP2_TOKEN_EXPECT;
+      }
+      break;
+    }
+    break;
+  case 7:
+    switch (name[6]) {
+    case 'd':
+      if (memeq(":metho", name, 6)) {
+        return NGHTTP2_TOKEN__METHOD;
+      }
+      break;
+    case 'e':
+      if (memeq(":schem", name, 6)) {
+        return NGHTTP2_TOKEN__SCHEME;
+      }
+      if (memeq("upgrad", name, 6)) {
+        return NGHTTP2_TOKEN_UPGRADE;
+      }
+      break;
+    case 'h':
+      if (memeq("refres", name, 6)) {
+        return NGHTTP2_TOKEN_REFRESH;
+      }
+      break;
+    case 'r':
+      if (memeq("refere", name, 6)) {
+        return NGHTTP2_TOKEN_REFERER;
+      }
+      break;
+    case 's':
+      if (memeq(":statu", name, 6)) {
+        return NGHTTP2_TOKEN__STATUS;
+      }
+      if (memeq("expire", name, 6)) {
+        return NGHTTP2_TOKEN_EXPIRES;
+      }
+      break;
+    }
+    break;
+  case 8:
+    switch (name[7]) {
+    case 'e':
+      if (memeq("if-rang", name, 7)) {
+        return NGHTTP2_TOKEN_IF_RANGE;
+      }
+      break;
+    case 'h':
+      if (memeq("if-matc", name, 7)) {
+        return NGHTTP2_TOKEN_IF_MATCH;
+      }
+      break;
+    case 'n':
+      if (memeq("locatio", name, 7)) {
+        return NGHTTP2_TOKEN_LOCATION;
+      }
+      break;
+    }
+    break;
+  case 9:
+    switch (name[8]) {
+    case 'l':
+      if (memeq(":protoco", name, 8)) {
+        return NGHTTP2_TOKEN__PROTOCOL;
+      }
+      break;
+    }
+    break;
+  case 10:
+    switch (name[9]) {
+    case 'e':
+      if (memeq("keep-aliv", name, 9)) {
+        return NGHTTP2_TOKEN_KEEP_ALIVE;
+      }
+      if (memeq("set-cooki", name, 9)) {
+        return NGHTTP2_TOKEN_SET_COOKIE;
+      }
+      break;
+    case 'n':
+      if (memeq("connectio", name, 9)) {
+        return NGHTTP2_TOKEN_CONNECTION;
+      }
+      break;
+    case 't':
+      if (memeq("user-agen", name, 9)) {
+        return NGHTTP2_TOKEN_USER_AGENT;
+      }
+      break;
+    case 'y':
+      if (memeq(":authorit", name, 9)) {
+        return NGHTTP2_TOKEN__AUTHORITY;
+      }
+      break;
+    }
+    break;
+  case 11:
+    switch (name[10]) {
+    case 'r':
+      if (memeq("retry-afte", name, 10)) {
+        return NGHTTP2_TOKEN_RETRY_AFTER;
+      }
+      break;
+    }
+    break;
+  case 12:
+    switch (name[11]) {
+    case 'e':
+      if (memeq("content-typ", name, 11)) {
+        return NGHTTP2_TOKEN_CONTENT_TYPE;
+      }
+      break;
+    case 's':
+      if (memeq("max-forward", name, 11)) {
+        return NGHTTP2_TOKEN_MAX_FORWARDS;
+      }
+      break;
+    }
+    break;
+  case 13:
+    switch (name[12]) {
+    case 'd':
+      if (memeq("last-modifie", name, 12)) {
+        return NGHTTP2_TOKEN_LAST_MODIFIED;
+      }
+      break;
+    case 'e':
+      if (memeq("content-rang", name, 12)) {
+        return NGHTTP2_TOKEN_CONTENT_RANGE;
+      }
+      break;
+    case 'h':
+      if (memeq("if-none-matc", name, 12)) {
+        return NGHTTP2_TOKEN_IF_NONE_MATCH;
+      }
+      break;
+    case 'l':
+      if (memeq("cache-contro", name, 12)) {
+        return NGHTTP2_TOKEN_CACHE_CONTROL;
+      }
+      break;
+    case 'n':
+      if (memeq("authorizatio", name, 12)) {
+        return NGHTTP2_TOKEN_AUTHORIZATION;
+      }
+      break;
+    case 's':
+      if (memeq("accept-range", name, 12)) {
+        return NGHTTP2_TOKEN_ACCEPT_RANGES;
+      }
+      break;
+    }
+    break;
+  case 14:
+    switch (name[13]) {
+    case 'h':
+      if (memeq("content-lengt", name, 13)) {
+        return NGHTTP2_TOKEN_CONTENT_LENGTH;
+      }
+      break;
+    case 't':
+      if (memeq("accept-charse", name, 13)) {
+        return NGHTTP2_TOKEN_ACCEPT_CHARSET;
+      }
+      break;
+    }
+    break;
+  case 15:
+    switch (name[14]) {
+    case 'e':
+      if (memeq("accept-languag", name, 14)) {
+        return NGHTTP2_TOKEN_ACCEPT_LANGUAGE;
+      }
+      break;
+    case 'g':
+      if (memeq("accept-encodin", name, 14)) {
+        return NGHTTP2_TOKEN_ACCEPT_ENCODING;
+      }
+      break;
+    }
+    break;
+  case 16:
+    switch (name[15]) {
+    case 'e':
+      if (memeq("content-languag", name, 15)) {
+        return NGHTTP2_TOKEN_CONTENT_LANGUAGE;
+      }
+      if (memeq("www-authenticat", name, 15)) {
+        return NGHTTP2_TOKEN_WWW_AUTHENTICATE;
+      }
+      break;
+    case 'g':
+      if (memeq("content-encodin", name, 15)) {
+        return NGHTTP2_TOKEN_CONTENT_ENCODING;
+      }
+      break;
+    case 'n':
+      if (memeq("content-locatio", name, 15)) {
+        return NGHTTP2_TOKEN_CONTENT_LOCATION;
+      }
+      if (memeq("proxy-connectio", name, 15)) {
+        return NGHTTP2_TOKEN_PROXY_CONNECTION;
+      }
+      break;
+    }
+    break;
+  case 17:
+    switch (name[16]) {
+    case 'e':
+      if (memeq("if-modified-sinc", name, 16)) {
+        return NGHTTP2_TOKEN_IF_MODIFIED_SINCE;
+      }
+      break;
+    case 'g':
+      if (memeq("transfer-encodin", name, 16)) {
+        return NGHTTP2_TOKEN_TRANSFER_ENCODING;
+      }
+      break;
+    }
+    break;
+  case 18:
+    switch (name[17]) {
+    case 'e':
+      if (memeq("proxy-authenticat", name, 17)) {
+        return NGHTTP2_TOKEN_PROXY_AUTHENTICATE;
+      }
+      break;
+    }
+    break;
+  case 19:
+    switch (name[18]) {
+    case 'e':
+      if (memeq("if-unmodified-sinc", name, 18)) {
+        return NGHTTP2_TOKEN_IF_UNMODIFIED_SINCE;
+      }
+      break;
+    case 'n':
+      if (memeq("content-dispositio", name, 18)) {
+        return NGHTTP2_TOKEN_CONTENT_DISPOSITION;
+      }
+      if (memeq("proxy-authorizatio", name, 18)) {
+        return NGHTTP2_TOKEN_PROXY_AUTHORIZATION;
+      }
+      break;
+    }
+    break;
+  case 25:
+    switch (name[24]) {
+    case 'y':
+      if (memeq("strict-transport-securit", name, 24)) {
+        return NGHTTP2_TOKEN_STRICT_TRANSPORT_SECURITY;
+      }
+      break;
+    }
+    break;
+  case 27:
+    switch (name[26]) {
+    case 'n':
+      if (memeq("access-control-allow-origi", name, 26)) {
+        return NGHTTP2_TOKEN_ACCESS_CONTROL_ALLOW_ORIGIN;
+      }
+      break;
+    }
+    break;
+  }
+  return -1;
+}
+
+void nghttp2_hd_entry_init(nghttp2_hd_entry *ent, nghttp2_hd_nv *nv) {
+  ent->nv = *nv;
+  ent->cnv.name = nv->name->base;
+  ent->cnv.namelen = nv->name->len;
+  ent->cnv.value = nv->value->base;
+  ent->cnv.valuelen = nv->value->len;
+  ent->cnv.flags = nv->flags;
+  ent->next = NULL;
+  ent->hash = 0;
+
+  nghttp2_rcbuf_incref(ent->nv.name);
+  nghttp2_rcbuf_incref(ent->nv.value);
+}
+
+void nghttp2_hd_entry_free(nghttp2_hd_entry *ent) {
+  nghttp2_rcbuf_decref(ent->nv.value);
+  nghttp2_rcbuf_decref(ent->nv.name);
+}
+
+static int name_eq(const nghttp2_hd_nv *a, const nghttp2_nv *b) {
+  return a->name->len == b->namelen &&
+         memeq(a->name->base, b->name, b->namelen);
+}
+
+static int value_eq(const nghttp2_hd_nv *a, const nghttp2_nv *b) {
+  return a->value->len == b->valuelen &&
+         memeq(a->value->base, b->value, b->valuelen);
+}
+
+static uint32_t name_hash(const nghttp2_nv *nv) {
+  /* 32 bit FNV-1a: http://isthe.com/chongo/tech/comp/fnv/ */
+  uint32_t h = 2166136261u;
+  size_t i;
+
+  for (i = 0; i < nv->namelen; ++i) {
+    h ^= nv->name[i];
+    h += (h << 1) + (h << 4) + (h << 7) + (h << 8) + (h << 24);
+  }
+
+  return h;
+}
+
+static void hd_map_init(nghttp2_hd_map *map) {
+  memset(map, 0, sizeof(nghttp2_hd_map));
+}
+
+static void hd_map_insert(nghttp2_hd_map *map, nghttp2_hd_entry *ent) {
+  nghttp2_hd_entry **bucket;
+
+  bucket = &map->table[ent->hash & (HD_MAP_SIZE - 1)];
+
+  if (*bucket == NULL) {
+    *bucket = ent;
+    return;
+  }
+
+  /* lower index is linked near the root */
+  ent->next = *bucket;
+  *bucket = ent;
+}
+
+static nghttp2_hd_entry *hd_map_find(nghttp2_hd_map *map, int *exact_match,
+                                     const nghttp2_nv *nv, int32_t token,
+                                     uint32_t hash, int name_only) {
+  nghttp2_hd_entry *p;
+  nghttp2_hd_entry *res = NULL;
+
+  *exact_match = 0;
+
+  for (p = map->table[hash & (HD_MAP_SIZE - 1)]; p; p = p->next) {
+    if (token != p->nv.token ||
+        (token == -1 && (hash != p->hash || !name_eq(&p->nv, nv)))) {
+      continue;
+    }
+    if (!res) {
+      res = p;
+      if (name_only) {
+        break;
+      }
+    }
+    if (value_eq(&p->nv, nv)) {
+      res = p;
+      *exact_match = 1;
+      break;
+    }
+  }
+
+  return res;
+}
+
+static void hd_map_remove(nghttp2_hd_map *map, nghttp2_hd_entry *ent) {
+  nghttp2_hd_entry **dst;
+
+  dst = &map->table[ent->hash & (HD_MAP_SIZE - 1)];
+
+  for (; *dst; dst = &(*dst)->next) {
+    if (*dst != ent) {
+      continue;
+    }
+
+    *dst = ent->next;
+    ent->next = NULL;
+    return;
+  }
+}
+
+static int hd_ringbuf_init(nghttp2_hd_ringbuf *ringbuf, size_t bufsize,
+                           nghttp2_mem *mem) {
+  size_t size;
+  for (size = 1; size < bufsize; size <<= 1)
+    ;
+  ringbuf->buffer = nghttp2_mem_malloc(mem, sizeof(nghttp2_hd_entry *) * size);
+  if (ringbuf->buffer == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+  ringbuf->mask = size - 1;
+  ringbuf->first = 0;
+  ringbuf->len = 0;
+  return 0;
+}
+
+static nghttp2_hd_entry *hd_ringbuf_get(nghttp2_hd_ringbuf *ringbuf,
+                                        size_t idx) {
+  assert(idx < ringbuf->len);
+  return ringbuf->buffer[(ringbuf->first + idx) & ringbuf->mask];
+}
+
+static int hd_ringbuf_reserve(nghttp2_hd_ringbuf *ringbuf, size_t bufsize,
+                              nghttp2_mem *mem) {
+  size_t i;
+  size_t size;
+  nghttp2_hd_entry **buffer;
+
+  if (ringbuf->mask + 1 >= bufsize) {
+    return 0;
+  }
+  for (size = 1; size < bufsize; size <<= 1)
+    ;
+  buffer = nghttp2_mem_malloc(mem, sizeof(nghttp2_hd_entry *) * size);
+  if (buffer == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+  for (i = 0; i < ringbuf->len; ++i) {
+    buffer[i] = hd_ringbuf_get(ringbuf, i);
+  }
+  nghttp2_mem_free(mem, ringbuf->buffer);
+  ringbuf->buffer = buffer;
+  ringbuf->mask = size - 1;
+  ringbuf->first = 0;
+  return 0;
+}
+
+static void hd_ringbuf_free(nghttp2_hd_ringbuf *ringbuf, nghttp2_mem *mem) {
+  size_t i;
+  if (ringbuf == NULL) {
+    return;
+  }
+  for (i = 0; i < ringbuf->len; ++i) {
+    nghttp2_hd_entry *ent = hd_ringbuf_get(ringbuf, i);
+
+    nghttp2_hd_entry_free(ent);
+    nghttp2_mem_free(mem, ent);
+  }
+  nghttp2_mem_free(mem, ringbuf->buffer);
+}
+
+static int hd_ringbuf_push_front(nghttp2_hd_ringbuf *ringbuf,
+                                 nghttp2_hd_entry *ent, nghttp2_mem *mem) {
+  int rv;
+
+  rv = hd_ringbuf_reserve(ringbuf, ringbuf->len + 1, mem);
+
+  if (rv != 0) {
+    return rv;
+  }
+
+  ringbuf->buffer[--ringbuf->first & ringbuf->mask] = ent;
+  ++ringbuf->len;
+
+  return 0;
+}
+
+static void hd_ringbuf_pop_back(nghttp2_hd_ringbuf *ringbuf) {
+  assert(ringbuf->len > 0);
+  --ringbuf->len;
+}
+
+static int hd_context_init(nghttp2_hd_context *context, nghttp2_mem *mem) {
+  int rv;
+  context->mem = mem;
+  context->bad = 0;
+  context->hd_table_bufsize_max = NGHTTP2_HD_DEFAULT_MAX_BUFFER_SIZE;
+  rv = hd_ringbuf_init(
+      &context->hd_table,
+      context->hd_table_bufsize_max / NGHTTP2_HD_ENTRY_OVERHEAD, mem);
+  if (rv != 0) {
+    return rv;
+  }
+
+  context->hd_table_bufsize = 0;
+  context->next_seq = 0;
+
+  return 0;
+}
+
+static void hd_context_free(nghttp2_hd_context *context) {
+  hd_ringbuf_free(&context->hd_table, context->mem);
+}
+
+int nghttp2_hd_deflate_init(nghttp2_hd_deflater *deflater, nghttp2_mem *mem) {
+  return nghttp2_hd_deflate_init2(
+      deflater, NGHTTP2_HD_DEFAULT_MAX_DEFLATE_BUFFER_SIZE, mem);
+}
+
+int nghttp2_hd_deflate_init2(nghttp2_hd_deflater *deflater,
+                             size_t max_deflate_dynamic_table_size,
+                             nghttp2_mem *mem) {
+  int rv;
+  rv = hd_context_init(&deflater->ctx, mem);
+  if (rv != 0) {
+    return rv;
+  }
+
+  hd_map_init(&deflater->map);
+
+  if (max_deflate_dynamic_table_size < NGHTTP2_HD_DEFAULT_MAX_BUFFER_SIZE) {
+    deflater->notify_table_size_change = 1;
+    deflater->ctx.hd_table_bufsize_max = max_deflate_dynamic_table_size;
+  } else {
+    deflater->notify_table_size_change = 0;
+  }
+
+  deflater->deflate_hd_table_bufsize_max = max_deflate_dynamic_table_size;
+  deflater->min_hd_table_bufsize_max = UINT32_MAX;
+
+  return 0;
+}
+
+int nghttp2_hd_inflate_init(nghttp2_hd_inflater *inflater, nghttp2_mem *mem) {
+  int rv;
+
+  rv = hd_context_init(&inflater->ctx, mem);
+  if (rv != 0) {
+    goto fail;
+  }
+
+  inflater->settings_hd_table_bufsize_max = NGHTTP2_HD_DEFAULT_MAX_BUFFER_SIZE;
+  inflater->min_hd_table_bufsize_max = UINT32_MAX;
+
+  inflater->nv_name_keep = NULL;
+  inflater->nv_value_keep = NULL;
+
+  inflater->opcode = NGHTTP2_HD_OPCODE_NONE;
+  inflater->state = NGHTTP2_HD_STATE_INFLATE_START;
+
+  nghttp2_buf_init(&inflater->namebuf);
+  nghttp2_buf_init(&inflater->valuebuf);
+
+  inflater->namercbuf = NULL;
+  inflater->valuercbuf = NULL;
+
+  inflater->huffman_encoded = 0;
+  inflater->index = 0;
+  inflater->left = 0;
+  inflater->shift = 0;
+  inflater->index_required = 0;
+  inflater->no_index = 0;
+
+  return 0;
+
+fail:
+  return rv;
+}
+
+static void hd_inflate_keep_free(nghttp2_hd_inflater *inflater) {
+  nghttp2_rcbuf_decref(inflater->nv_value_keep);
+  nghttp2_rcbuf_decref(inflater->nv_name_keep);
+
+  inflater->nv_value_keep = NULL;
+  inflater->nv_name_keep = NULL;
+}
+
+void nghttp2_hd_deflate_free(nghttp2_hd_deflater *deflater) {
+  hd_context_free(&deflater->ctx);
+}
+
+void nghttp2_hd_inflate_free(nghttp2_hd_inflater *inflater) {
+  hd_inflate_keep_free(inflater);
+
+  nghttp2_rcbuf_decref(inflater->valuercbuf);
+  nghttp2_rcbuf_decref(inflater->namercbuf);
+
+  hd_context_free(&inflater->ctx);
+}
+
+static size_t entry_room(size_t namelen, size_t valuelen) {
+  return NGHTTP2_HD_ENTRY_OVERHEAD + namelen + valuelen;
+}
+
+static void emit_header(nghttp2_hd_nv *nv_out, nghttp2_hd_nv *nv) {
+  DEBUGF("inflatehd: header emission: %s: %s\n", nv->name->base,
+         nv->value->base);
+  /* ent->ref may be 0. This happens if the encoder emits literal
+     block larger than header table capacity with indexing. */
+  *nv_out = *nv;
+}
+
+static size_t count_encoded_length(size_t n, size_t prefix) {
+  size_t k = (size_t)((1 << prefix) - 1);
+  size_t len = 0;
+
+  if (n < k) {
+    return 1;
+  }
+
+  n -= k;
+  ++len;
+
+  for (; n >= 128; n >>= 7, ++len)
+    ;
+
+  return len + 1;
+}
+
+static size_t encode_length(uint8_t *buf, size_t n, size_t prefix) {
+  size_t k = (size_t)((1 << prefix) - 1);
+  uint8_t *begin = buf;
+
+  *buf = (uint8_t)(*buf & ~k);
+
+  if (n < k) {
+    *buf = (uint8_t)(*buf | n);
+    return 1;
+  }
+
+  *buf = (uint8_t)(*buf | k);
+  ++buf;
+
+  n -= k;
+
+  for (; n >= 128; n >>= 7) {
+    *buf++ = (uint8_t)((1 << 7) | (n & 0x7f));
+  }
+
+  *buf++ = (uint8_t)n;
+
+  return (size_t)(buf - begin);
+}
+
+/*
+ * Decodes |prefix| prefixed integer stored from |in|.  The |last|
+ * represents the 1 beyond the last of the valid contiguous memory
+ * region from |in|.  The decoded integer must be less than or equal
+ * to UINT32_MAX.
+ *
+ * If the |initial| is nonzero, it is used as a initial value, this
+ * function assumes the |in| starts with intermediate data.
+ *
+ * An entire integer is decoded successfully, decoded, the |*fin| is
+ * set to nonzero.
+ *
+ * This function stores the decoded integer in |*res| if it succeed,
+ * including partial decoding (in this case, number of shift to make
+ * in the next call will be stored in |*shift_ptr|) and returns number
+ * of bytes processed, or returns -1, indicating decoding error.
+ */
+static ssize_t decode_length(uint32_t *res, size_t *shift_ptr, int *fin,
+                             uint32_t initial, size_t shift, const uint8_t *in,
+                             const uint8_t *last, size_t prefix) {
+  uint32_t k = (uint8_t)((1 << prefix) - 1);
+  uint32_t n = initial;
+  const uint8_t *start = in;
+
+  *shift_ptr = 0;
+  *fin = 0;
+
+  if (n == 0) {
+    if ((*in & k) != k) {
+      *res = (*in) & k;
+      *fin = 1;
+      return 1;
+    }
+
+    n = k;
+
+    if (++in == last) {
+      *res = n;
+      return (ssize_t)(in - start);
+    }
+  }
+
+  for (; in != last; ++in, shift += 7) {
+    uint32_t add = *in & 0x7f;
+
+    if (shift >= 32) {
+      DEBUGF("inflate: shift exponent overflow\n");
+      return -1;
+    }
+
+    if ((UINT32_MAX >> shift) < add) {
+      DEBUGF("inflate: integer overflow on shift\n");
+      return -1;
+    }
+
+    add <<= shift;
+
+    if (UINT32_MAX - add < n) {
+      DEBUGF("inflate: integer overflow on addition\n");
+      return -1;
+    }
+
+    n += add;
+
+    if ((*in & (1 << 7)) == 0) {
+      break;
+    }
+  }
+
+  *shift_ptr = shift;
+
+  if (in == last) {
+    *res = n;
+    return (ssize_t)(in - start);
+  }
+
+  *res = n;
+  *fin = 1;
+  return (ssize_t)(in + 1 - start);
+}
+
+static int emit_table_size(nghttp2_bufs *bufs, size_t table_size) {
+  int rv;
+  uint8_t *bufp;
+  size_t blocklen;
+  uint8_t sb[16];
+
+  DEBUGF("deflatehd: emit table_size=%zu\n", table_size);
+
+  blocklen = count_encoded_length(table_size, 5);
+
+  if (sizeof(sb) < blocklen) {
+    return NGHTTP2_ERR_HEADER_COMP;
+  }
+
+  bufp = sb;
+
+  *bufp = 0x20u;
+
+  encode_length(bufp, table_size, 5);
+
+  rv = nghttp2_bufs_add(bufs, sb, blocklen);
+  if (rv != 0) {
+    return rv;
+  }
+
+  return 0;
+}
+
+static int emit_indexed_block(nghttp2_bufs *bufs, size_t idx) {
+  int rv;
+  size_t blocklen;
+  uint8_t sb[16];
+  uint8_t *bufp;
+
+  blocklen = count_encoded_length(idx + 1, 7);
+
+  DEBUGF("deflatehd: emit indexed index=%zu, %zu bytes\n", idx, blocklen);
+
+  if (sizeof(sb) < blocklen) {
+    return NGHTTP2_ERR_HEADER_COMP;
+  }
+
+  bufp = sb;
+  *bufp = 0x80u;
+  encode_length(bufp, idx + 1, 7);
+
+  rv = nghttp2_bufs_add(bufs, sb, blocklen);
+  if (rv != 0) {
+    return rv;
+  }
+
+  return 0;
+}
+
+static int emit_string(nghttp2_bufs *bufs, const uint8_t *str, size_t len) {
+  int rv;
+  uint8_t sb[16];
+  uint8_t *bufp;
+  size_t blocklen;
+  size_t enclen;
+  int huffman = 0;
+
+  enclen = nghttp2_hd_huff_encode_count(str, len);
+
+  if (enclen < len) {
+    huffman = 1;
+  } else {
+    enclen = len;
+  }
+
+  blocklen = count_encoded_length(enclen, 7);
+
+  DEBUGF("deflatehd: emit string str=%.*s, length=%zu, huffman=%d, "
+         "encoded_length=%zu\n",
+         (int)len, (const char *)str, len, huffman, enclen);
+
+  if (sizeof(sb) < blocklen) {
+    return NGHTTP2_ERR_HEADER_COMP;
+  }
+
+  bufp = sb;
+  *bufp = huffman ? 1 << 7 : 0;
+  encode_length(bufp, enclen, 7);
+
+  rv = nghttp2_bufs_add(bufs, sb, blocklen);
+  if (rv != 0) {
+    return rv;
+  }
+
+  if (huffman) {
+    rv = nghttp2_hd_huff_encode(bufs, str, len);
+  } else {
+    assert(enclen == len);
+    rv = nghttp2_bufs_add(bufs, str, len);
+  }
+
+  return rv;
+}
+
+static uint8_t pack_first_byte(int indexing_mode) {
+  switch (indexing_mode) {
+  case NGHTTP2_HD_WITH_INDEXING:
+    return 0x40u;
+  case NGHTTP2_HD_WITHOUT_INDEXING:
+    return 0;
+  case NGHTTP2_HD_NEVER_INDEXING:
+    return 0x10u;
+  default:
+    assert(0);
+  }
+  /* This is required to compile with android NDK r10d +
+     --enable-werror */
+  return 0;
+}
+
+static int emit_indname_block(nghttp2_bufs *bufs, size_t idx,
+                              const nghttp2_nv *nv, int indexing_mode) {
+  int rv;
+  uint8_t *bufp;
+  size_t blocklen;
+  uint8_t sb[16];
+  size_t prefixlen;
+
+  if (indexing_mode == NGHTTP2_HD_WITH_INDEXING) {
+    prefixlen = 6;
+  } else {
+    prefixlen = 4;
+  }
+
+  DEBUGF("deflatehd: emit indname index=%zu, valuelen=%zu, indexing_mode=%d\n",
+         idx, nv->valuelen, indexing_mode);
+
+  blocklen = count_encoded_length(idx + 1, prefixlen);
+
+  if (sizeof(sb) < blocklen) {
+    return NGHTTP2_ERR_HEADER_COMP;
+  }
+
+  bufp = sb;
+
+  *bufp = pack_first_byte(indexing_mode);
+
+  encode_length(bufp, idx + 1, prefixlen);
+
+  rv = nghttp2_bufs_add(bufs, sb, blocklen);
+  if (rv != 0) {
+    return rv;
+  }
+
+  rv = emit_string(bufs, nv->value, nv->valuelen);
+  if (rv != 0) {
+    return rv;
+  }
+
+  return 0;
+}
+
+static int emit_newname_block(nghttp2_bufs *bufs, const nghttp2_nv *nv,
+                              int indexing_mode) {
+  int rv;
+
+  DEBUGF(
+      "deflatehd: emit newname namelen=%zu, valuelen=%zu, indexing_mode=%d\n",
+      nv->namelen, nv->valuelen, indexing_mode);
+
+  rv = nghttp2_bufs_addb(bufs, pack_first_byte(indexing_mode));
+  if (rv != 0) {
+    return rv;
+  }
+
+  rv = emit_string(bufs, nv->name, nv->namelen);
+  if (rv != 0) {
+    return rv;
+  }
+
+  rv = emit_string(bufs, nv->value, nv->valuelen);
+  if (rv != 0) {
+    return rv;
+  }
+
+  return 0;
+}
+
+static int add_hd_table_incremental(nghttp2_hd_context *context,
+                                    nghttp2_hd_nv *nv, nghttp2_hd_map *map,
+                                    uint32_t hash) {
+  int rv;
+  nghttp2_hd_entry *new_ent;
+  size_t room;
+  nghttp2_mem *mem;
+
+  mem = context->mem;
+  room = entry_room(nv->name->len, nv->value->len);
+
+  while (context->hd_table_bufsize + room > context->hd_table_bufsize_max &&
+         context->hd_table.len > 0) {
+
+    size_t idx = context->hd_table.len - 1;
+    nghttp2_hd_entry *ent = hd_ringbuf_get(&context->hd_table, idx);
+
+    context->hd_table_bufsize -=
+        entry_room(ent->nv.name->len, ent->nv.value->len);
+
+    DEBUGF("hpack: remove item from header table: %s: %s\n",
+           (char *)ent->nv.name->base, (char *)ent->nv.value->base);
+
+    hd_ringbuf_pop_back(&context->hd_table);
+    if (map) {
+      hd_map_remove(map, ent);
+    }
+
+    nghttp2_hd_entry_free(ent);
+    nghttp2_mem_free(mem, ent);
+  }
+
+  if (room > context->hd_table_bufsize_max) {
+    /* The entry taking more than NGHTTP2_HD_MAX_BUFFER_SIZE is
+       immediately evicted.  So we don't allocate memory for it. */
+    return 0;
+  }
+
+  new_ent = nghttp2_mem_malloc(mem, sizeof(nghttp2_hd_entry));
+  if (new_ent == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  nghttp2_hd_entry_init(new_ent, nv);
+
+  rv = hd_ringbuf_push_front(&context->hd_table, new_ent, mem);
+
+  if (rv != 0) {
+    nghttp2_hd_entry_free(new_ent);
+    nghttp2_mem_free(mem, new_ent);
+
+    return rv;
+  }
+
+  new_ent->seq = context->next_seq++;
+  new_ent->hash = hash;
+
+  if (map) {
+    hd_map_insert(map, new_ent);
+  }
+
+  context->hd_table_bufsize += room;
+
+  return 0;
+}
+
+typedef struct {
+  ssize_t index;
+  /* Nonzero if both name and value are matched. */
+  int name_value_match;
+} search_result;
+
+static search_result search_static_table(const nghttp2_nv *nv, int32_t token,
+                                         int name_only) {
+  search_result res = {token, 0};
+  int i;
+  const nghttp2_hd_static_entry *ent;
+
+  if (name_only) {
+    return res;
+  }
+
+  for (i = token;
+       i <= NGHTTP2_TOKEN_WWW_AUTHENTICATE && static_table[i].token == token;
+       ++i) {
+    ent = &static_table[i];
+    if (ent->value.len == nv->valuelen &&
+        memcmp(ent->value.base, nv->value, nv->valuelen) == 0) {
+      res.index = i;
+      res.name_value_match = 1;
+      return res;
+    }
+  }
+  return res;
+}
+
+static search_result search_hd_table(nghttp2_hd_context *context,
+                                     const nghttp2_nv *nv, int32_t token,
+                                     int indexing_mode, nghttp2_hd_map *map,
+                                     uint32_t hash) {
+  search_result res = {-1, 0};
+  const nghttp2_hd_entry *ent;
+  int exact_match;
+  int name_only = indexing_mode == NGHTTP2_HD_NEVER_INDEXING;
+
+  exact_match = 0;
+  ent = hd_map_find(map, &exact_match, nv, token, hash, name_only);
+
+  if (!exact_match && token >= 0 && token <= NGHTTP2_TOKEN_WWW_AUTHENTICATE) {
+    return search_static_table(nv, token, name_only);
+  }
+
+  if (ent == NULL) {
+    return res;
+  }
+
+  res.index =
+      (ssize_t)(context->next_seq - 1 - ent->seq + NGHTTP2_STATIC_TABLE_LENGTH);
+  res.name_value_match = exact_match;
+
+  return res;
+}
+
+static void hd_context_shrink_table_size(nghttp2_hd_context *context,
+                                         nghttp2_hd_map *map) {
+  nghttp2_mem *mem;
+
+  mem = context->mem;
+
+  while (context->hd_table_bufsize > context->hd_table_bufsize_max &&
+         context->hd_table.len > 0) {
+    size_t idx = context->hd_table.len - 1;
+    nghttp2_hd_entry *ent = hd_ringbuf_get(&context->hd_table, idx);
+    context->hd_table_bufsize -=
+        entry_room(ent->nv.name->len, ent->nv.value->len);
+    hd_ringbuf_pop_back(&context->hd_table);
+    if (map) {
+      hd_map_remove(map, ent);
+    }
+
+    nghttp2_hd_entry_free(ent);
+    nghttp2_mem_free(mem, ent);
+  }
+}
+
+int nghttp2_hd_deflate_change_table_size(
+    nghttp2_hd_deflater *deflater, size_t settings_max_dynamic_table_size) {
+  size_t next_bufsize = nghttp2_min(settings_max_dynamic_table_size,
+                                    deflater->deflate_hd_table_bufsize_max);
+
+  deflater->ctx.hd_table_bufsize_max = next_bufsize;
+
+  deflater->min_hd_table_bufsize_max =
+      nghttp2_min(deflater->min_hd_table_bufsize_max, next_bufsize);
+
+  deflater->notify_table_size_change = 1;
+
+  hd_context_shrink_table_size(&deflater->ctx, &deflater->map);
+  return 0;
+}
+
+int nghttp2_hd_inflate_change_table_size(
+    nghttp2_hd_inflater *inflater, size_t settings_max_dynamic_table_size) {
+  switch (inflater->state) {
+  case NGHTTP2_HD_STATE_EXPECT_TABLE_SIZE:
+  case NGHTTP2_HD_STATE_INFLATE_START:
+    break;
+  default:
+    return NGHTTP2_ERR_INVALID_STATE;
+  }
+
+  /* It seems that encoder is not required to send dynamic table size
+     update if the table size is not changed after applying
+     SETTINGS_HEADER_TABLE_SIZE.  RFC 7541 is ambiguous here, but this
+     is the intention of the editor.  If new maximum table size is
+     strictly smaller than the current negotiated maximum size,
+     encoder must send dynamic table size update.  In other cases, we
+     cannot expect it to do so. */
+  if (inflater->ctx.hd_table_bufsize_max > settings_max_dynamic_table_size) {
+    inflater->state = NGHTTP2_HD_STATE_EXPECT_TABLE_SIZE;
+    /* Remember minimum value, and validate that encoder sends the
+       value less than or equal to this. */
+    inflater->min_hd_table_bufsize_max = settings_max_dynamic_table_size;
+  }
+
+  inflater->settings_hd_table_bufsize_max = settings_max_dynamic_table_size;
+
+  inflater->ctx.hd_table_bufsize_max = settings_max_dynamic_table_size;
+
+  hd_context_shrink_table_size(&inflater->ctx, NULL);
+  return 0;
+}
+
+#define INDEX_RANGE_VALID(context, idx)                                        \
+  ((idx) < (context)->hd_table.len + NGHTTP2_STATIC_TABLE_LENGTH)
+
+static size_t get_max_index(nghttp2_hd_context *context) {
+  return context->hd_table.len + NGHTTP2_STATIC_TABLE_LENGTH;
+}
+
+nghttp2_hd_nv nghttp2_hd_table_get(nghttp2_hd_context *context, size_t idx) {
+  assert(INDEX_RANGE_VALID(context, idx));
+  if (idx >= NGHTTP2_STATIC_TABLE_LENGTH) {
+    return hd_ringbuf_get(&context->hd_table, idx - NGHTTP2_STATIC_TABLE_LENGTH)
+        ->nv;
+  } else {
+    const nghttp2_hd_static_entry *ent = &static_table[idx];
+    nghttp2_hd_nv nv = {(nghttp2_rcbuf *)&ent->name,
+                        (nghttp2_rcbuf *)&ent->value, ent->token,
+                        NGHTTP2_NV_FLAG_NONE};
+    return nv;
+  }
+}
+
+static const nghttp2_nv *nghttp2_hd_table_get2(nghttp2_hd_context *context,
+                                               size_t idx) {
+  assert(INDEX_RANGE_VALID(context, idx));
+  if (idx >= NGHTTP2_STATIC_TABLE_LENGTH) {
+    return &hd_ringbuf_get(&context->hd_table,
+                           idx - NGHTTP2_STATIC_TABLE_LENGTH)
+                ->cnv;
+  }
+
+  return &static_table[idx].cnv;
+}
+
+static int hd_deflate_decide_indexing(nghttp2_hd_deflater *deflater,
+                                      const nghttp2_nv *nv, int32_t token) {
+  if (token == NGHTTP2_TOKEN__PATH || token == NGHTTP2_TOKEN_AGE ||
+      token == NGHTTP2_TOKEN_CONTENT_LENGTH || token == NGHTTP2_TOKEN_ETAG ||
+      token == NGHTTP2_TOKEN_IF_MODIFIED_SINCE ||
+      token == NGHTTP2_TOKEN_IF_NONE_MATCH || token == NGHTTP2_TOKEN_LOCATION ||
+      token == NGHTTP2_TOKEN_SET_COOKIE ||
+      entry_room(nv->namelen, nv->valuelen) >
+          deflater->ctx.hd_table_bufsize_max * 3 / 4) {
+    return NGHTTP2_HD_WITHOUT_INDEXING;
+  }
+
+  return NGHTTP2_HD_WITH_INDEXING;
+}
+
+static int deflate_nv(nghttp2_hd_deflater *deflater, nghttp2_bufs *bufs,
+                      const nghttp2_nv *nv) {
+  int rv;
+  search_result res;
+  ssize_t idx;
+  int indexing_mode;
+  int32_t token;
+  nghttp2_mem *mem;
+  uint32_t hash = 0;
+
+  DEBUGF("deflatehd: deflating %.*s: %.*s\n", (int)nv->namelen, nv->name,
+         (int)nv->valuelen, nv->value);
+
+  mem = deflater->ctx.mem;
+
+  token = lookup_token(nv->name, nv->namelen);
+  if (token == -1) {
+    hash = name_hash(nv);
+  } else if (token <= NGHTTP2_TOKEN_WWW_AUTHENTICATE) {
+    hash = static_table[token].hash;
+  }
+
+  /* Don't index authorization header field since it may contain low
+     entropy secret data (e.g., id/password).  Also cookie header
+     field with less than 20 bytes value is also never indexed.  This
+     is the same criteria used in Firefox codebase. */
+  indexing_mode =
+      token == NGHTTP2_TOKEN_AUTHORIZATION ||
+              (token == NGHTTP2_TOKEN_COOKIE && nv->valuelen < 20) ||
+              (nv->flags & NGHTTP2_NV_FLAG_NO_INDEX)
+          ? NGHTTP2_HD_NEVER_INDEXING
+          : hd_deflate_decide_indexing(deflater, nv, token);
+
+  res = search_hd_table(&deflater->ctx, nv, token, indexing_mode,
+                        &deflater->map, hash);
+
+  idx = res.index;
+
+  if (res.name_value_match) {
+
+    DEBUGF("deflatehd: name/value match index=%zd\n", idx);
+
+    rv = emit_indexed_block(bufs, (size_t)idx);
+    if (rv != 0) {
+      return rv;
+    }
+
+    return 0;
+  }
+
+  if (res.index != -1) {
+    DEBUGF("deflatehd: name match index=%zd\n", res.index);
+  }
+
+  if (indexing_mode == NGHTTP2_HD_WITH_INDEXING) {
+    nghttp2_hd_nv hd_nv;
+
+    if (idx != -1) {
+      hd_nv.name = nghttp2_hd_table_get(&deflater->ctx, (size_t)idx).name;
+      nghttp2_rcbuf_incref(hd_nv.name);
+    } else {
+      rv = nghttp2_rcbuf_new2(&hd_nv.name, nv->name, nv->namelen, mem);
+      if (rv != 0) {
+        return rv;
+      }
+    }
+
+    rv = nghttp2_rcbuf_new2(&hd_nv.value, nv->value, nv->valuelen, mem);
+
+    if (rv != 0) {
+      nghttp2_rcbuf_decref(hd_nv.name);
+      return rv;
+    }
+
+    hd_nv.token = token;
+    hd_nv.flags = NGHTTP2_NV_FLAG_NONE;
+
+    rv = add_hd_table_incremental(&deflater->ctx, &hd_nv, &deflater->map, hash);
+
+    nghttp2_rcbuf_decref(hd_nv.value);
+    nghttp2_rcbuf_decref(hd_nv.name);
+
+    if (rv != 0) {
+      return NGHTTP2_ERR_HEADER_COMP;
+    }
+  }
+  if (idx == -1) {
+    rv = emit_newname_block(bufs, nv, indexing_mode);
+  } else {
+    rv = emit_indname_block(bufs, (size_t)idx, nv, indexing_mode);
+  }
+  if (rv != 0) {
+    return rv;
+  }
+
+  return 0;
+}
+
+int nghttp2_hd_deflate_hd_bufs(nghttp2_hd_deflater *deflater,
+                               nghttp2_bufs *bufs, const nghttp2_nv *nv,
+                               size_t nvlen) {
+  size_t i;
+  int rv = 0;
+
+  if (deflater->ctx.bad) {
+    return NGHTTP2_ERR_HEADER_COMP;
+  }
+
+  if (deflater->notify_table_size_change) {
+    size_t min_hd_table_bufsize_max;
+
+    min_hd_table_bufsize_max = deflater->min_hd_table_bufsize_max;
+
+    deflater->notify_table_size_change = 0;
+    deflater->min_hd_table_bufsize_max = UINT32_MAX;
+
+    if (deflater->ctx.hd_table_bufsize_max > min_hd_table_bufsize_max) {
+
+      rv = emit_table_size(bufs, min_hd_table_bufsize_max);
+
+      if (rv != 0) {
+        goto fail;
+      }
+    }
+
+    rv = emit_table_size(bufs, deflater->ctx.hd_table_bufsize_max);
+
+    if (rv != 0) {
+      goto fail;
+    }
+  }
+
+  for (i = 0; i < nvlen; ++i) {
+    rv = deflate_nv(deflater, bufs, &nv[i]);
+    if (rv != 0) {
+      goto fail;
+    }
+  }
+
+  DEBUGF("deflatehd: all input name/value pairs were deflated\n");
+
+  return 0;
+fail:
+  DEBUGF("deflatehd: error return %d\n", rv);
+
+  deflater->ctx.bad = 1;
+  return rv;
+}
+
+ssize_t nghttp2_hd_deflate_hd(nghttp2_hd_deflater *deflater, uint8_t *buf,
+                              size_t buflen, const nghttp2_nv *nv,
+                              size_t nvlen) {
+  nghttp2_bufs bufs;
+  int rv;
+  nghttp2_mem *mem;
+
+  mem = deflater->ctx.mem;
+
+  rv = nghttp2_bufs_wrap_init(&bufs, buf, buflen, mem);
+
+  if (rv != 0) {
+    return rv;
+  }
+
+  rv = nghttp2_hd_deflate_hd_bufs(deflater, &bufs, nv, nvlen);
+
+  buflen = nghttp2_bufs_len(&bufs);
+
+  nghttp2_bufs_wrap_free(&bufs);
+
+  if (rv == NGHTTP2_ERR_BUFFER_ERROR) {
+    return NGHTTP2_ERR_INSUFF_BUFSIZE;
+  }
+
+  if (rv != 0) {
+    return rv;
+  }
+
+  return (ssize_t)buflen;
+}
+
+ssize_t nghttp2_hd_deflate_hd_vec(nghttp2_hd_deflater *deflater,
+                                  const nghttp2_vec *vec, size_t veclen,
+                                  const nghttp2_nv *nv, size_t nvlen) {
+  nghttp2_bufs bufs;
+  int rv;
+  nghttp2_mem *mem;
+  size_t buflen;
+
+  mem = deflater->ctx.mem;
+
+  rv = nghttp2_bufs_wrap_init2(&bufs, vec, veclen, mem);
+
+  if (rv != 0) {
+    return rv;
+  }
+
+  rv = nghttp2_hd_deflate_hd_bufs(deflater, &bufs, nv, nvlen);
+
+  buflen = nghttp2_bufs_len(&bufs);
+
+  nghttp2_bufs_wrap_free(&bufs);
+
+  if (rv == NGHTTP2_ERR_BUFFER_ERROR) {
+    return NGHTTP2_ERR_INSUFF_BUFSIZE;
+  }
+
+  if (rv != 0) {
+    return rv;
+  }
+
+  return (ssize_t)buflen;
+}
+
+size_t nghttp2_hd_deflate_bound(nghttp2_hd_deflater *deflater,
+                                const nghttp2_nv *nva, size_t nvlen) {
+  size_t n = 0;
+  size_t i;
+  (void)deflater;
+
+  /* Possible Maximum Header Table Size Change.  Encoding (1u << 31) -
+     1 using 4 bit prefix requires 6 bytes.  We may emit this at most
+     twice. */
+  n += 12;
+
+  /* Use Literal Header Field without indexing - New Name, since it is
+     most space consuming format.  Also we choose the less one between
+     non-huffman and huffman, so using literal byte count is
+     sufficient for upper bound.
+
+     Encoding (1u << 31) - 1 using 7 bit prefix requires 6 bytes.  We
+     need 2 of this for |nvlen| header fields. */
+  n += 6 * 2 * nvlen;
+
+  for (i = 0; i < nvlen; ++i) {
+    n += nva[i].namelen + nva[i].valuelen;
+  }
+
+  return n;
+}
+
+int nghttp2_hd_deflate_new(nghttp2_hd_deflater **deflater_ptr,
+                           size_t deflate_hd_table_bufsize_max) {
+  return nghttp2_hd_deflate_new2(deflater_ptr, deflate_hd_table_bufsize_max,
+                                 NULL);
+}
+
+int nghttp2_hd_deflate_new2(nghttp2_hd_deflater **deflater_ptr,
+                            size_t deflate_hd_table_bufsize_max,
+                            nghttp2_mem *mem) {
+  int rv;
+  nghttp2_hd_deflater *deflater;
+
+  if (mem == NULL) {
+    mem = nghttp2_mem_default();
+  }
+
+  deflater = nghttp2_mem_malloc(mem, sizeof(nghttp2_hd_deflater));
+
+  if (deflater == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  rv = nghttp2_hd_deflate_init2(deflater, deflate_hd_table_bufsize_max, mem);
+
+  if (rv != 0) {
+    nghttp2_mem_free(mem, deflater);
+
+    return rv;
+  }
+
+  *deflater_ptr = deflater;
+
+  return 0;
+}
+
+void nghttp2_hd_deflate_del(nghttp2_hd_deflater *deflater) {
+  nghttp2_mem *mem;
+
+  mem = deflater->ctx.mem;
+
+  nghttp2_hd_deflate_free(deflater);
+
+  nghttp2_mem_free(mem, deflater);
+}
+
+static void hd_inflate_set_huffman_encoded(nghttp2_hd_inflater *inflater,
+                                           const uint8_t *in) {
+  inflater->huffman_encoded = (*in & (1 << 7)) != 0;
+}
+
+/*
+ * Decodes the integer from the range [in, last).  The result is
+ * assigned to |inflater->left|.  If the |inflater->left| is 0, then
+ * it performs variable integer decoding from scratch. Otherwise, it
+ * uses the |inflater->left| as the initial value and continues to
+ * decode assuming that [in, last) begins with intermediary sequence.
+ *
+ * This function returns the number of bytes read if it succeeds, or
+ * one of the following negative error codes:
+ *
+ * NGHTTP2_ERR_HEADER_COMP
+ *   Integer decoding failed
+ */
+static ssize_t hd_inflate_read_len(nghttp2_hd_inflater *inflater, int *rfin,
+                                   const uint8_t *in, const uint8_t *last,
+                                   size_t prefix, size_t maxlen) {
+  ssize_t rv;
+  uint32_t out;
+
+  *rfin = 0;
+
+  rv = decode_length(&out, &inflater->shift, rfin, (uint32_t)inflater->left,
+                     inflater->shift, in, last, prefix);
+
+  if (rv == -1) {
+    DEBUGF("inflatehd: integer decoding failed\n");
+    return NGHTTP2_ERR_HEADER_COMP;
+  }
+
+  if (out > maxlen) {
+    DEBUGF("inflatehd: integer exceeded the maximum value %zu\n", maxlen);
+    return NGHTTP2_ERR_HEADER_COMP;
+  }
+
+  inflater->left = out;
+
+  DEBUGF("inflatehd: decoded integer is %u\n", out);
+
+  return rv;
+}
+
+/*
+ * Reads |inflater->left| bytes from the range [in, last) and performs
+ * huffman decoding against them and pushes the result into the
+ * |buffer|.
+ *
+ * This function returns the number of bytes read if it succeeds, or
+ * one of the following negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *   Out of memory
+ * NGHTTP2_ERR_HEADER_COMP
+ *   Huffman decoding failed
+ */
+static ssize_t hd_inflate_read_huff(nghttp2_hd_inflater *inflater,
+                                    nghttp2_buf *buf, const uint8_t *in,
+                                    const uint8_t *last) {
+  ssize_t readlen;
+  int fin = 0;
+  if ((size_t)(last - in) >= inflater->left) {
+    last = in + inflater->left;
+    fin = 1;
+  }
+  readlen = nghttp2_hd_huff_decode(&inflater->huff_decode_ctx, buf, in,
+                                   (size_t)(last - in), fin);
+
+  if (readlen < 0) {
+    DEBUGF("inflatehd: huffman decoding failed\n");
+    return readlen;
+  }
+  if (nghttp2_hd_huff_decode_failure_state(&inflater->huff_decode_ctx)) {
+    DEBUGF("inflatehd: huffman decoding failed\n");
+    return NGHTTP2_ERR_HEADER_COMP;
+  }
+
+  inflater->left -= (size_t)readlen;
+  return readlen;
+}
+
+/*
+ * Reads |inflater->left| bytes from the range [in, last) and copies
+ * them into the |buffer|.
+ *
+ * This function returns the number of bytes read if it succeeds, or
+ * one of the following negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *   Out of memory
+ * NGHTTP2_ERR_HEADER_COMP
+ *   Header decompression failed
+ */
+static ssize_t hd_inflate_read(nghttp2_hd_inflater *inflater, nghttp2_buf *buf,
+                               const uint8_t *in, const uint8_t *last) {
+  size_t len = nghttp2_min((size_t)(last - in), inflater->left);
+
+  buf->last = nghttp2_cpymem(buf->last, in, len);
+
+  inflater->left -= len;
+  return (ssize_t)len;
+}
+
+/*
+ * Finalize indexed header representation reception.  The referenced
+ * header is always emitted, and |*nv_out| is filled with that value.
+ */
+static void hd_inflate_commit_indexed(nghttp2_hd_inflater *inflater,
+                                      nghttp2_hd_nv *nv_out) {
+  nghttp2_hd_nv nv = nghttp2_hd_table_get(&inflater->ctx, inflater->index);
+
+  emit_header(nv_out, &nv);
+}
+
+/*
+ * Finalize literal header representation - new name- reception. If
+ * header is emitted, |*nv_out| is filled with that value and 0 is
+ * returned.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *   Out of memory
+ */
+static int hd_inflate_commit_newname(nghttp2_hd_inflater *inflater,
+                                     nghttp2_hd_nv *nv_out) {
+  nghttp2_hd_nv nv;
+  int rv;
+
+  if (inflater->no_index) {
+    nv.flags = NGHTTP2_NV_FLAG_NO_INDEX;
+  } else {
+    nv.flags = NGHTTP2_NV_FLAG_NONE;
+  }
+
+  nv.name = inflater->namercbuf;
+  nv.value = inflater->valuercbuf;
+  nv.token = lookup_token(inflater->namercbuf->base, inflater->namercbuf->len);
+
+  if (inflater->index_required) {
+    rv = add_hd_table_incremental(&inflater->ctx, &nv, NULL, 0);
+
+    if (rv != 0) {
+      return rv;
+    }
+  }
+
+  emit_header(nv_out, &nv);
+
+  inflater->nv_name_keep = nv.name;
+  inflater->nv_value_keep = nv.value;
+
+  inflater->namercbuf = NULL;
+  inflater->valuercbuf = NULL;
+
+  return 0;
+}
+
+/*
+ * Finalize literal header representation - indexed name-
+ * reception. If header is emitted, |*nv_out| is filled with that
+ * value and 0 is returned.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *   Out of memory
+ */
+static int hd_inflate_commit_indname(nghttp2_hd_inflater *inflater,
+                                     nghttp2_hd_nv *nv_out) {
+  nghttp2_hd_nv nv;
+  int rv;
+
+  nv = nghttp2_hd_table_get(&inflater->ctx, inflater->index);
+
+  if (inflater->no_index) {
+    nv.flags = NGHTTP2_NV_FLAG_NO_INDEX;
+  } else {
+    nv.flags = NGHTTP2_NV_FLAG_NONE;
+  }
+
+  nghttp2_rcbuf_incref(nv.name);
+
+  nv.value = inflater->valuercbuf;
+
+  if (inflater->index_required) {
+    rv = add_hd_table_incremental(&inflater->ctx, &nv, NULL, 0);
+    if (rv != 0) {
+      nghttp2_rcbuf_decref(nv.name);
+      return NGHTTP2_ERR_NOMEM;
+    }
+  }
+
+  emit_header(nv_out, &nv);
+
+  inflater->nv_name_keep = nv.name;
+  inflater->nv_value_keep = nv.value;
+
+  inflater->valuercbuf = NULL;
+
+  return 0;
+}
+
+ssize_t nghttp2_hd_inflate_hd(nghttp2_hd_inflater *inflater, nghttp2_nv *nv_out,
+                              int *inflate_flags, uint8_t *in, size_t inlen,
+                              int in_final) {
+  return nghttp2_hd_inflate_hd2(inflater, nv_out, inflate_flags, in, inlen,
+                                in_final);
+}
+
+ssize_t nghttp2_hd_inflate_hd2(nghttp2_hd_inflater *inflater,
+                               nghttp2_nv *nv_out, int *inflate_flags,
+                               const uint8_t *in, size_t inlen, int in_final) {
+  ssize_t rv;
+  nghttp2_hd_nv hd_nv;
+
+  rv = nghttp2_hd_inflate_hd_nv(inflater, &hd_nv, inflate_flags, in, inlen,
+                                in_final);
+
+  if (rv < 0) {
+    return rv;
+  }
+
+  if (*inflate_flags & NGHTTP2_HD_INFLATE_EMIT) {
+    nv_out->name = hd_nv.name->base;
+    nv_out->namelen = hd_nv.name->len;
+
+    nv_out->value = hd_nv.value->base;
+    nv_out->valuelen = hd_nv.value->len;
+
+    nv_out->flags = hd_nv.flags;
+  }
+
+  return rv;
+}
+
+ssize_t nghttp2_hd_inflate_hd_nv(nghttp2_hd_inflater *inflater,
+                                 nghttp2_hd_nv *nv_out, int *inflate_flags,
+                                 const uint8_t *in, size_t inlen,
+                                 int in_final) {
+  ssize_t rv = 0;
+  const uint8_t *first = in;
+  const uint8_t *last = in + inlen;
+  int rfin = 0;
+  int busy = 0;
+  nghttp2_mem *mem;
+
+  mem = inflater->ctx.mem;
+
+  if (inflater->ctx.bad) {
+    return NGHTTP2_ERR_HEADER_COMP;
+  }
+
+  DEBUGF("inflatehd: start state=%d\n", inflater->state);
+  hd_inflate_keep_free(inflater);
+  *inflate_flags = NGHTTP2_HD_INFLATE_NONE;
+  for (; in != last || busy;) {
+    busy = 0;
+    switch (inflater->state) {
+    case NGHTTP2_HD_STATE_EXPECT_TABLE_SIZE:
+      if ((*in & 0xe0u) != 0x20u) {
+        DEBUGF("inflatehd: header table size change was expected, but saw "
+               "0x%02x as first byte",
+               *in);
+        rv = NGHTTP2_ERR_HEADER_COMP;
+        goto fail;
+      }
+    /* fall through */
+    case NGHTTP2_HD_STATE_INFLATE_START:
+    case NGHTTP2_HD_STATE_OPCODE:
+      if ((*in & 0xe0u) == 0x20u) {
+        DEBUGF("inflatehd: header table size change\n");
+        if (inflater->state == NGHTTP2_HD_STATE_OPCODE) {
+          DEBUGF("inflatehd: header table size change must appear at the head "
+                 "of header block\n");
+          rv = NGHTTP2_ERR_HEADER_COMP;
+          goto fail;
+        }
+        inflater->opcode = NGHTTP2_HD_OPCODE_INDEXED;
+        inflater->state = NGHTTP2_HD_STATE_READ_TABLE_SIZE;
+      } else if (*in & 0x80u) {
+        DEBUGF("inflatehd: indexed repr\n");
+        inflater->opcode = NGHTTP2_HD_OPCODE_INDEXED;
+        inflater->state = NGHTTP2_HD_STATE_READ_INDEX;
+      } else {
+        if (*in == 0x40u || *in == 0 || *in == 0x10u) {
+          DEBUGF("inflatehd: literal header repr - new name\n");
+          inflater->opcode = NGHTTP2_HD_OPCODE_NEWNAME;
+          inflater->state = NGHTTP2_HD_STATE_NEWNAME_CHECK_NAMELEN;
+        } else {
+          DEBUGF("inflatehd: literal header repr - indexed name\n");
+          inflater->opcode = NGHTTP2_HD_OPCODE_INDNAME;
+          inflater->state = NGHTTP2_HD_STATE_READ_INDEX;
+        }
+        inflater->index_required = (*in & 0x40) != 0;
+        inflater->no_index = (*in & 0xf0u) == 0x10u;
+        DEBUGF("inflatehd: indexing required=%d, no_index=%d\n",
+               inflater->index_required, inflater->no_index);
+        if (inflater->opcode == NGHTTP2_HD_OPCODE_NEWNAME) {
+          ++in;
+        }
+      }
+      inflater->left = 0;
+      inflater->shift = 0;
+      break;
+    case NGHTTP2_HD_STATE_READ_TABLE_SIZE:
+      rfin = 0;
+      rv = hd_inflate_read_len(
+          inflater, &rfin, in, last, 5,
+          nghttp2_min(inflater->min_hd_table_bufsize_max,
+                      inflater->settings_hd_table_bufsize_max));
+      if (rv < 0) {
+        goto fail;
+      }
+      in += rv;
+      if (!rfin) {
+        goto almost_ok;
+      }
+      DEBUGF("inflatehd: table_size=%zu\n", inflater->left);
+      inflater->min_hd_table_bufsize_max = UINT32_MAX;
+      inflater->ctx.hd_table_bufsize_max = inflater->left;
+      hd_context_shrink_table_size(&inflater->ctx, NULL);
+      inflater->state = NGHTTP2_HD_STATE_INFLATE_START;
+      break;
+    case NGHTTP2_HD_STATE_READ_INDEX: {
+      size_t prefixlen;
+
+      if (inflater->opcode == NGHTTP2_HD_OPCODE_INDEXED) {
+        prefixlen = 7;
+      } else if (inflater->index_required) {
+        prefixlen = 6;
+      } else {
+        prefixlen = 4;
+      }
+
+      rfin = 0;
+      rv = hd_inflate_read_len(inflater, &rfin, in, last, prefixlen,
+                               get_max_index(&inflater->ctx));
+      if (rv < 0) {
+        goto fail;
+      }
+
+      in += rv;
+
+      if (!rfin) {
+        goto almost_ok;
+      }
+
+      if (inflater->left == 0) {
+        rv = NGHTTP2_ERR_HEADER_COMP;
+        goto fail;
+      }
+
+      DEBUGF("inflatehd: index=%zu\n", inflater->left);
+      if (inflater->opcode == NGHTTP2_HD_OPCODE_INDEXED) {
+        inflater->index = inflater->left;
+        --inflater->index;
+
+        hd_inflate_commit_indexed(inflater, nv_out);
+
+        inflater->state = NGHTTP2_HD_STATE_OPCODE;
+        *inflate_flags |= NGHTTP2_HD_INFLATE_EMIT;
+        return (ssize_t)(in - first);
+      } else {
+        inflater->index = inflater->left;
+        --inflater->index;
+
+        inflater->state = NGHTTP2_HD_STATE_CHECK_VALUELEN;
+      }
+      break;
+    }
+    case NGHTTP2_HD_STATE_NEWNAME_CHECK_NAMELEN:
+      hd_inflate_set_huffman_encoded(inflater, in);
+      inflater->state = NGHTTP2_HD_STATE_NEWNAME_READ_NAMELEN;
+      inflater->left = 0;
+      inflater->shift = 0;
+      DEBUGF("inflatehd: huffman encoded=%d\n", inflater->huffman_encoded != 0);
+    /* Fall through */
+    case NGHTTP2_HD_STATE_NEWNAME_READ_NAMELEN:
+      rfin = 0;
+      rv = hd_inflate_read_len(inflater, &rfin, in, last, 7, NGHTTP2_HD_MAX_NV);
+      if (rv < 0) {
+        goto fail;
+      }
+      in += rv;
+      if (!rfin) {
+        DEBUGF("inflatehd: integer not fully decoded. current=%zu\n",
+               inflater->left);
+
+        goto almost_ok;
+      }
+
+      if (inflater->huffman_encoded) {
+        nghttp2_hd_huff_decode_context_init(&inflater->huff_decode_ctx);
+
+        inflater->state = NGHTTP2_HD_STATE_NEWNAME_READ_NAMEHUFF;
+
+        rv = nghttp2_rcbuf_new(&inflater->namercbuf, inflater->left * 2 + 1,
+                               mem);
+      } else {
+        inflater->state = NGHTTP2_HD_STATE_NEWNAME_READ_NAME;
+        rv = nghttp2_rcbuf_new(&inflater->namercbuf, inflater->left + 1, mem);
+      }
+
+      if (rv != 0) {
+        goto fail;
+      }
+
+      nghttp2_buf_wrap_init(&inflater->namebuf, inflater->namercbuf->base,
+                            inflater->namercbuf->len);
+
+      break;
+    case NGHTTP2_HD_STATE_NEWNAME_READ_NAMEHUFF:
+      rv = hd_inflate_read_huff(inflater, &inflater->namebuf, in, last);
+      if (rv < 0) {
+        goto fail;
+      }
+
+      in += rv;
+
+      DEBUGF("inflatehd: %zd bytes read\n", rv);
+
+      if (inflater->left) {
+        DEBUGF("inflatehd: still %zu bytes to go\n", inflater->left);
+
+        goto almost_ok;
+      }
+
+      *inflater->namebuf.last = '\0';
+      inflater->namercbuf->len = nghttp2_buf_len(&inflater->namebuf);
+
+      inflater->state = NGHTTP2_HD_STATE_CHECK_VALUELEN;
+
+      break;
+    case NGHTTP2_HD_STATE_NEWNAME_READ_NAME:
+      rv = hd_inflate_read(inflater, &inflater->namebuf, in, last);
+      if (rv < 0) {
+        goto fail;
+      }
+
+      in += rv;
+
+      DEBUGF("inflatehd: %zd bytes read\n", rv);
+      if (inflater->left) {
+        DEBUGF("inflatehd: still %zu bytes to go\n", inflater->left);
+
+        goto almost_ok;
+      }
+
+      *inflater->namebuf.last = '\0';
+      inflater->namercbuf->len = nghttp2_buf_len(&inflater->namebuf);
+
+      inflater->state = NGHTTP2_HD_STATE_CHECK_VALUELEN;
+
+      break;
+    case NGHTTP2_HD_STATE_CHECK_VALUELEN:
+      hd_inflate_set_huffman_encoded(inflater, in);
+      inflater->state = NGHTTP2_HD_STATE_READ_VALUELEN;
+      inflater->left = 0;
+      inflater->shift = 0;
+      DEBUGF("inflatehd: huffman encoded=%d\n", inflater->huffman_encoded != 0);
+    /* Fall through */
+    case NGHTTP2_HD_STATE_READ_VALUELEN:
+      rfin = 0;
+      rv = hd_inflate_read_len(inflater, &rfin, in, last, 7, NGHTTP2_HD_MAX_NV);
+      if (rv < 0) {
+        goto fail;
+      }
+
+      in += rv;
+
+      if (!rfin) {
+        goto almost_ok;
+      }
+
+      DEBUGF("inflatehd: valuelen=%zu\n", inflater->left);
+
+      if (inflater->huffman_encoded) {
+        nghttp2_hd_huff_decode_context_init(&inflater->huff_decode_ctx);
+
+        inflater->state = NGHTTP2_HD_STATE_READ_VALUEHUFF;
+
+        rv = nghttp2_rcbuf_new(&inflater->valuercbuf, inflater->left * 2 + 1,
+                               mem);
+      } else {
+        inflater->state = NGHTTP2_HD_STATE_READ_VALUE;
+
+        rv = nghttp2_rcbuf_new(&inflater->valuercbuf, inflater->left + 1, mem);
+      }
+
+      if (rv != 0) {
+        goto fail;
+      }
+
+      nghttp2_buf_wrap_init(&inflater->valuebuf, inflater->valuercbuf->base,
+                            inflater->valuercbuf->len);
+
+      busy = 1;
+
+      break;
+    case NGHTTP2_HD_STATE_READ_VALUEHUFF:
+      rv = hd_inflate_read_huff(inflater, &inflater->valuebuf, in, last);
+      if (rv < 0) {
+        goto fail;
+      }
+
+      in += rv;
+
+      DEBUGF("inflatehd: %zd bytes read\n", rv);
+
+      if (inflater->left) {
+        DEBUGF("inflatehd: still %zu bytes to go\n", inflater->left);
+
+        goto almost_ok;
+      }
+
+      *inflater->valuebuf.last = '\0';
+      inflater->valuercbuf->len = nghttp2_buf_len(&inflater->valuebuf);
+
+      if (inflater->opcode == NGHTTP2_HD_OPCODE_NEWNAME) {
+        rv = hd_inflate_commit_newname(inflater, nv_out);
+      } else {
+        rv = hd_inflate_commit_indname(inflater, nv_out);
+      }
+
+      if (rv != 0) {
+        goto fail;
+      }
+
+      inflater->state = NGHTTP2_HD_STATE_OPCODE;
+      *inflate_flags |= NGHTTP2_HD_INFLATE_EMIT;
+
+      return (ssize_t)(in - first);
+    case NGHTTP2_HD_STATE_READ_VALUE:
+      rv = hd_inflate_read(inflater, &inflater->valuebuf, in, last);
+      if (rv < 0) {
+        DEBUGF("inflatehd: value read failure %zd: %s\n", rv,
+               nghttp2_strerror((int)rv));
+        goto fail;
+      }
+
+      in += rv;
+
+      DEBUGF("inflatehd: %zd bytes read\n", rv);
+
+      if (inflater->left) {
+        DEBUGF("inflatehd: still %zu bytes to go\n", inflater->left);
+        goto almost_ok;
+      }
+
+      *inflater->valuebuf.last = '\0';
+      inflater->valuercbuf->len = nghttp2_buf_len(&inflater->valuebuf);
+
+      if (inflater->opcode == NGHTTP2_HD_OPCODE_NEWNAME) {
+        rv = hd_inflate_commit_newname(inflater, nv_out);
+      } else {
+        rv = hd_inflate_commit_indname(inflater, nv_out);
+      }
+
+      if (rv != 0) {
+        goto fail;
+      }
+
+      inflater->state = NGHTTP2_HD_STATE_OPCODE;
+      *inflate_flags |= NGHTTP2_HD_INFLATE_EMIT;
+
+      return (ssize_t)(in - first);
+    }
+  }
+
+  assert(in == last);
+
+  DEBUGF("inflatehd: all input bytes were processed\n");
+
+  if (in_final) {
+    DEBUGF("inflatehd: in_final set\n");
+
+    if (inflater->state != NGHTTP2_HD_STATE_OPCODE &&
+        inflater->state != NGHTTP2_HD_STATE_INFLATE_START) {
+      DEBUGF("inflatehd: unacceptable state=%d\n", inflater->state);
+      rv = NGHTTP2_ERR_HEADER_COMP;
+
+      goto fail;
+    }
+    *inflate_flags |= NGHTTP2_HD_INFLATE_FINAL;
+  }
+  return (ssize_t)(in - first);
+
+almost_ok:
+  if (in_final) {
+    DEBUGF("inflatehd: input ended prematurely\n");
+
+    rv = NGHTTP2_ERR_HEADER_COMP;
+
+    goto fail;
+  }
+  return (ssize_t)(in - first);
+
+fail:
+  DEBUGF("inflatehd: error return %zd\n", rv);
+
+  inflater->ctx.bad = 1;
+  return rv;
+}
+
+int nghttp2_hd_inflate_end_headers(nghttp2_hd_inflater *inflater) {
+  hd_inflate_keep_free(inflater);
+  inflater->state = NGHTTP2_HD_STATE_INFLATE_START;
+  return 0;
+}
+
+int nghttp2_hd_inflate_new(nghttp2_hd_inflater **inflater_ptr) {
+  return nghttp2_hd_inflate_new2(inflater_ptr, NULL);
+}
+
+int nghttp2_hd_inflate_new2(nghttp2_hd_inflater **inflater_ptr,
+                            nghttp2_mem *mem) {
+  int rv;
+  nghttp2_hd_inflater *inflater;
+
+  if (mem == NULL) {
+    mem = nghttp2_mem_default();
+  }
+
+  inflater = nghttp2_mem_malloc(mem, sizeof(nghttp2_hd_inflater));
+
+  if (inflater == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  rv = nghttp2_hd_inflate_init(inflater, mem);
+
+  if (rv != 0) {
+    nghttp2_mem_free(mem, inflater);
+
+    return rv;
+  }
+
+  *inflater_ptr = inflater;
+
+  return 0;
+}
+
+void nghttp2_hd_inflate_del(nghttp2_hd_inflater *inflater) {
+  nghttp2_mem *mem;
+
+  mem = inflater->ctx.mem;
+  nghttp2_hd_inflate_free(inflater);
+
+  nghttp2_mem_free(mem, inflater);
+}
+
+int nghttp2_hd_emit_indname_block(nghttp2_bufs *bufs, size_t idx,
+                                  nghttp2_nv *nv, int indexing_mode) {
+
+  return emit_indname_block(bufs, idx, nv, indexing_mode);
+}
+
+int nghttp2_hd_emit_newname_block(nghttp2_bufs *bufs, nghttp2_nv *nv,
+                                  int indexing_mode) {
+  return emit_newname_block(bufs, nv, indexing_mode);
+}
+
+int nghttp2_hd_emit_table_size(nghttp2_bufs *bufs, size_t table_size) {
+  return emit_table_size(bufs, table_size);
+}
+
+ssize_t nghttp2_hd_decode_length(uint32_t *res, size_t *shift_ptr, int *fin,
+                                 uint32_t initial, size_t shift, uint8_t *in,
+                                 uint8_t *last, size_t prefix) {
+  return decode_length(res, shift_ptr, fin, initial, shift, in, last, prefix);
+}
+
+static const nghttp2_nv *hd_get_table_entry(nghttp2_hd_context *context,
+                                            size_t idx) {
+  if (idx == 0) {
+    return NULL;
+  }
+
+  --idx;
+
+  if (!INDEX_RANGE_VALID(context, idx)) {
+    return NULL;
+  }
+
+  return nghttp2_hd_table_get2(context, idx);
+}
+
+size_t nghttp2_hd_deflate_get_num_table_entries(nghttp2_hd_deflater *deflater) {
+  return get_max_index(&deflater->ctx);
+}
+
+const nghttp2_nv *
+nghttp2_hd_deflate_get_table_entry(nghttp2_hd_deflater *deflater, size_t idx) {
+  return hd_get_table_entry(&deflater->ctx, idx);
+}
+
+size_t
+nghttp2_hd_deflate_get_dynamic_table_size(nghttp2_hd_deflater *deflater) {
+  return deflater->ctx.hd_table_bufsize;
+}
+
+size_t
+nghttp2_hd_deflate_get_max_dynamic_table_size(nghttp2_hd_deflater *deflater) {
+  return deflater->ctx.hd_table_bufsize_max;
+}
+
+size_t nghttp2_hd_inflate_get_num_table_entries(nghttp2_hd_inflater *inflater) {
+  return get_max_index(&inflater->ctx);
+}
+
+const nghttp2_nv *
+nghttp2_hd_inflate_get_table_entry(nghttp2_hd_inflater *inflater, size_t idx) {
+  return hd_get_table_entry(&inflater->ctx, idx);
+}
+
+size_t
+nghttp2_hd_inflate_get_dynamic_table_size(nghttp2_hd_inflater *inflater) {
+  return inflater->ctx.hd_table_bufsize;
+}
+
+size_t
+nghttp2_hd_inflate_get_max_dynamic_table_size(nghttp2_hd_inflater *inflater) {
+  return inflater->ctx.hd_table_bufsize_max;
+}

lib/nghttp2_hd.h

@@ -0,0 +1,439 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2013 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_HD_H
+#define NGHTTP2_HD_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+
+#include "nghttp2_hd_huffman.h"
+#include "nghttp2_buf.h"
+#include "nghttp2_mem.h"
+#include "nghttp2_rcbuf.h"
+
+#define NGHTTP2_HD_DEFAULT_MAX_BUFFER_SIZE NGHTTP2_DEFAULT_HEADER_TABLE_SIZE
+#define NGHTTP2_HD_ENTRY_OVERHEAD 32
+
+/* The maximum length of one name/value pair.  This is the sum of the
+   length of name and value.  This is not specified by the spec. We
+   just chose the arbitrary size */
+#define NGHTTP2_HD_MAX_NV 65536
+
+/* Default size of maximum table buffer size for encoder. Even if
+   remote decoder notifies larger buffer size for its decoding,
+   encoder only uses the memory up to this value. */
+#define NGHTTP2_HD_DEFAULT_MAX_DEFLATE_BUFFER_SIZE (1 << 12)
+
+/* Exported for unit test */
+#define NGHTTP2_STATIC_TABLE_LENGTH 61
+
+/* Generated by genlibtokenlookup.py */
+typedef enum {
+  NGHTTP2_TOKEN__AUTHORITY = 0,
+  NGHTTP2_TOKEN__METHOD = 1,
+  NGHTTP2_TOKEN__PATH = 3,
+  NGHTTP2_TOKEN__SCHEME = 5,
+  NGHTTP2_TOKEN__STATUS = 7,
+  NGHTTP2_TOKEN_ACCEPT_CHARSET = 14,
+  NGHTTP2_TOKEN_ACCEPT_ENCODING = 15,
+  NGHTTP2_TOKEN_ACCEPT_LANGUAGE = 16,
+  NGHTTP2_TOKEN_ACCEPT_RANGES = 17,
+  NGHTTP2_TOKEN_ACCEPT = 18,
+  NGHTTP2_TOKEN_ACCESS_CONTROL_ALLOW_ORIGIN = 19,
+  NGHTTP2_TOKEN_AGE = 20,
+  NGHTTP2_TOKEN_ALLOW = 21,
+  NGHTTP2_TOKEN_AUTHORIZATION = 22,
+  NGHTTP2_TOKEN_CACHE_CONTROL = 23,
+  NGHTTP2_TOKEN_CONTENT_DISPOSITION = 24,
+  NGHTTP2_TOKEN_CONTENT_ENCODING = 25,
+  NGHTTP2_TOKEN_CONTENT_LANGUAGE = 26,
+  NGHTTP2_TOKEN_CONTENT_LENGTH = 27,
+  NGHTTP2_TOKEN_CONTENT_LOCATION = 28,
+  NGHTTP2_TOKEN_CONTENT_RANGE = 29,
+  NGHTTP2_TOKEN_CONTENT_TYPE = 30,
+  NGHTTP2_TOKEN_COOKIE = 31,
+  NGHTTP2_TOKEN_DATE = 32,
+  NGHTTP2_TOKEN_ETAG = 33,
+  NGHTTP2_TOKEN_EXPECT = 34,
+  NGHTTP2_TOKEN_EXPIRES = 35,
+  NGHTTP2_TOKEN_FROM = 36,
+  NGHTTP2_TOKEN_HOST = 37,
+  NGHTTP2_TOKEN_IF_MATCH = 38,
+  NGHTTP2_TOKEN_IF_MODIFIED_SINCE = 39,
+  NGHTTP2_TOKEN_IF_NONE_MATCH = 40,
+  NGHTTP2_TOKEN_IF_RANGE = 41,
+  NGHTTP2_TOKEN_IF_UNMODIFIED_SINCE = 42,
+  NGHTTP2_TOKEN_LAST_MODIFIED = 43,
+  NGHTTP2_TOKEN_LINK = 44,
+  NGHTTP2_TOKEN_LOCATION = 45,
+  NGHTTP2_TOKEN_MAX_FORWARDS = 46,
+  NGHTTP2_TOKEN_PROXY_AUTHENTICATE = 47,
+  NGHTTP2_TOKEN_PROXY_AUTHORIZATION = 48,
+  NGHTTP2_TOKEN_RANGE = 49,
+  NGHTTP2_TOKEN_REFERER = 50,
+  NGHTTP2_TOKEN_REFRESH = 51,
+  NGHTTP2_TOKEN_RETRY_AFTER = 52,
+  NGHTTP2_TOKEN_SERVER = 53,
+  NGHTTP2_TOKEN_SET_COOKIE = 54,
+  NGHTTP2_TOKEN_STRICT_TRANSPORT_SECURITY = 55,
+  NGHTTP2_TOKEN_TRANSFER_ENCODING = 56,
+  NGHTTP2_TOKEN_USER_AGENT = 57,
+  NGHTTP2_TOKEN_VARY = 58,
+  NGHTTP2_TOKEN_VIA = 59,
+  NGHTTP2_TOKEN_WWW_AUTHENTICATE = 60,
+  NGHTTP2_TOKEN_TE,
+  NGHTTP2_TOKEN_CONNECTION,
+  NGHTTP2_TOKEN_KEEP_ALIVE,
+  NGHTTP2_TOKEN_PROXY_CONNECTION,
+  NGHTTP2_TOKEN_UPGRADE,
+  NGHTTP2_TOKEN__PROTOCOL,
+} nghttp2_token;
+
+struct nghttp2_hd_entry;
+typedef struct nghttp2_hd_entry nghttp2_hd_entry;
+
+typedef struct {
+  /* The buffer containing header field name.  NULL-termination is
+     guaranteed. */
+  nghttp2_rcbuf *name;
+  /* The buffer containing header field value.  NULL-termination is
+     guaranteed. */
+  nghttp2_rcbuf *value;
+  /* nghttp2_token value for name.  It could be -1 if we have no token
+     for that header field name. */
+  int32_t token;
+  /* Bitwise OR of one or more of nghttp2_nv_flag. */
+  uint8_t flags;
+} nghttp2_hd_nv;
+
+struct nghttp2_hd_entry {
+  /* The header field name/value pair */
+  nghttp2_hd_nv nv;
+  /* This is solely for nghttp2_hd_{deflate,inflate}_get_table_entry
+     APIs to keep backward compatibility. */
+  nghttp2_nv cnv;
+  /* The next entry which shares same bucket in hash table. */
+  nghttp2_hd_entry *next;
+  /* The sequence number.  We will increment it by one whenever we
+     store nghttp2_hd_entry to dynamic header table. */
+  uint32_t seq;
+  /* The hash value for header name (nv.name). */
+  uint32_t hash;
+};
+
+/* The entry used for static header table. */
+typedef struct {
+  nghttp2_rcbuf name;
+  nghttp2_rcbuf value;
+  nghttp2_nv cnv;
+  int32_t token;
+  uint32_t hash;
+} nghttp2_hd_static_entry;
+
+typedef struct {
+  nghttp2_hd_entry **buffer;
+  size_t mask;
+  size_t first;
+  size_t len;
+} nghttp2_hd_ringbuf;
+
+typedef enum {
+  NGHTTP2_HD_OPCODE_NONE,
+  NGHTTP2_HD_OPCODE_INDEXED,
+  NGHTTP2_HD_OPCODE_NEWNAME,
+  NGHTTP2_HD_OPCODE_INDNAME
+} nghttp2_hd_opcode;
+
+typedef enum {
+  NGHTTP2_HD_STATE_EXPECT_TABLE_SIZE,
+  NGHTTP2_HD_STATE_INFLATE_START,
+  NGHTTP2_HD_STATE_OPCODE,
+  NGHTTP2_HD_STATE_READ_TABLE_SIZE,
+  NGHTTP2_HD_STATE_READ_INDEX,
+  NGHTTP2_HD_STATE_NEWNAME_CHECK_NAMELEN,
+  NGHTTP2_HD_STATE_NEWNAME_READ_NAMELEN,
+  NGHTTP2_HD_STATE_NEWNAME_READ_NAMEHUFF,
+  NGHTTP2_HD_STATE_NEWNAME_READ_NAME,
+  NGHTTP2_HD_STATE_CHECK_VALUELEN,
+  NGHTTP2_HD_STATE_READ_VALUELEN,
+  NGHTTP2_HD_STATE_READ_VALUEHUFF,
+  NGHTTP2_HD_STATE_READ_VALUE
+} nghttp2_hd_inflate_state;
+
+typedef enum {
+  NGHTTP2_HD_WITH_INDEXING,
+  NGHTTP2_HD_WITHOUT_INDEXING,
+  NGHTTP2_HD_NEVER_INDEXING
+} nghttp2_hd_indexing_mode;
+
+typedef struct {
+  /* dynamic header table */
+  nghttp2_hd_ringbuf hd_table;
+  /* Memory allocator */
+  nghttp2_mem *mem;
+  /* Abstract buffer size of hd_table as described in the spec. This
+     is the sum of length of name/value in hd_table +
+     NGHTTP2_HD_ENTRY_OVERHEAD bytes overhead per each entry. */
+  size_t hd_table_bufsize;
+  /* The effective header table size. */
+  size_t hd_table_bufsize_max;
+  /* Next sequence number for nghttp2_hd_entry */
+  uint32_t next_seq;
+  /* If inflate/deflate error occurred, this value is set to 1 and
+     further invocation of inflate/deflate will fail with
+     NGHTTP2_ERR_HEADER_COMP. */
+  uint8_t bad;
+} nghttp2_hd_context;
+
+#define HD_MAP_SIZE 128
+
+typedef struct {
+  nghttp2_hd_entry *table[HD_MAP_SIZE];
+} nghttp2_hd_map;
+
+struct nghttp2_hd_deflater {
+  nghttp2_hd_context ctx;
+  nghttp2_hd_map map;
+  /* The upper limit of the header table size the deflater accepts. */
+  size_t deflate_hd_table_bufsize_max;
+  /* Minimum header table size notified in the next context update */
+  size_t min_hd_table_bufsize_max;
+  /* If nonzero, send header table size using encoding context update
+     in the next deflate process */
+  uint8_t notify_table_size_change;
+};
+
+struct nghttp2_hd_inflater {
+  nghttp2_hd_context ctx;
+  /* Stores current state of huffman decoding */
+  nghttp2_hd_huff_decode_context huff_decode_ctx;
+  /* header buffer */
+  nghttp2_buf namebuf, valuebuf;
+  nghttp2_rcbuf *namercbuf, *valuercbuf;
+  /* Pointer to the name/value pair which are used in the current
+     header emission. */
+  nghttp2_rcbuf *nv_name_keep, *nv_value_keep;
+  /* The number of bytes to read */
+  size_t left;
+  /* The index in indexed repr or indexed name */
+  size_t index;
+  /* The maximum header table size the inflater supports. This is the
+     same value transmitted in SETTINGS_HEADER_TABLE_SIZE */
+  size_t settings_hd_table_bufsize_max;
+  /* Minimum header table size set by nghttp2_hd_inflate_change_table_size */
+  size_t min_hd_table_bufsize_max;
+  /* The number of next shift to decode integer */
+  size_t shift;
+  nghttp2_hd_opcode opcode;
+  nghttp2_hd_inflate_state state;
+  /* nonzero if string is huffman encoded */
+  uint8_t huffman_encoded;
+  /* nonzero if deflater requires that current entry is indexed */
+  uint8_t index_required;
+  /* nonzero if deflater requires that current entry must not be
+     indexed */
+  uint8_t no_index;
+};
+
+/*
+ * Initializes the |ent| members.  The reference counts of nv->name
+ * and nv->value are increased by one for each.
+ */
+void nghttp2_hd_entry_init(nghttp2_hd_entry *ent, nghttp2_hd_nv *nv);
+
+/*
+ * This function decreases the reference counts of nv->name and
+ * nv->value.
+ */
+void nghttp2_hd_entry_free(nghttp2_hd_entry *ent);
+
+/*
+ * Initializes |deflater| for deflating name/values pairs.
+ *
+ * The encoder only uses up to
+ * NGHTTP2_HD_DEFAULT_MAX_DEFLATE_BUFFER_SIZE bytes for header table
+ * even if the larger value is specified later in
+ * nghttp2_hd_change_table_size().
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ */
+int nghttp2_hd_deflate_init(nghttp2_hd_deflater *deflater, nghttp2_mem *mem);
+
+/*
+ * Initializes |deflater| for deflating name/values pairs.
+ *
+ * The encoder only uses up to |max_deflate_dynamic_table_size| bytes
+ * for header table even if the larger value is specified later in
+ * nghttp2_hd_change_table_size().
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ */
+int nghttp2_hd_deflate_init2(nghttp2_hd_deflater *deflater,
+                             size_t max_deflate_dynamic_table_size,
+                             nghttp2_mem *mem);
+
+/*
+ * Deallocates any resources allocated for |deflater|.
+ */
+void nghttp2_hd_deflate_free(nghttp2_hd_deflater *deflater);
+
+/*
+ * Deflates the |nva|, which has the |nvlen| name/value pairs, into
+ * the |bufs|.
+ *
+ * This function expands |bufs| as necessary to store the result. If
+ * buffers is full and the process still requires more space, this
+ * function fails and returns NGHTTP2_ERR_HEADER_COMP.
+ *
+ * After this function returns, it is safe to delete the |nva|.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_HEADER_COMP
+ *     Deflation process has failed.
+ * NGHTTP2_ERR_BUFFER_ERROR
+ *     Out of buffer space.
+ */
+int nghttp2_hd_deflate_hd_bufs(nghttp2_hd_deflater *deflater,
+                               nghttp2_bufs *bufs, const nghttp2_nv *nva,
+                               size_t nvlen);
+
+/*
+ * Initializes |inflater| for inflating name/values pairs.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * :enum:`NGHTTP2_ERR_NOMEM`
+ *     Out of memory.
+ */
+int nghttp2_hd_inflate_init(nghttp2_hd_inflater *inflater, nghttp2_mem *mem);
+
+/*
+ * Deallocates any resources allocated for |inflater|.
+ */
+void nghttp2_hd_inflate_free(nghttp2_hd_inflater *inflater);
+
+/*
+ * Similar to nghttp2_hd_inflate_hd(), but this takes nghttp2_hd_nv
+ * instead of nghttp2_nv as output parameter |nv_out|.  Other than
+ * that return values and semantics are the same as
+ * nghttp2_hd_inflate_hd().
+ */
+ssize_t nghttp2_hd_inflate_hd_nv(nghttp2_hd_inflater *inflater,
+                                 nghttp2_hd_nv *nv_out, int *inflate_flags,
+                                 const uint8_t *in, size_t inlen, int in_final);
+
+/* For unittesting purpose */
+int nghttp2_hd_emit_indname_block(nghttp2_bufs *bufs, size_t index,
+                                  nghttp2_nv *nv, int indexing_mode);
+
+/* For unittesting purpose */
+int nghttp2_hd_emit_newname_block(nghttp2_bufs *bufs, nghttp2_nv *nv,
+                                  int indexing_mode);
+
+/* For unittesting purpose */
+int nghttp2_hd_emit_table_size(nghttp2_bufs *bufs, size_t table_size);
+
+/* For unittesting purpose */
+nghttp2_hd_nv nghttp2_hd_table_get(nghttp2_hd_context *context, size_t index);
+
+/* For unittesting purpose */
+ssize_t nghttp2_hd_decode_length(uint32_t *res, size_t *shift_ptr, int *fin,
+                                 uint32_t initial, size_t shift, uint8_t *in,
+                                 uint8_t *last, size_t prefix);
+
+/* Huffman encoding/decoding functions */
+
+/*
+ * Counts the required bytes to encode |src| with length |len|.
+ *
+ * This function returns the number of required bytes to encode given
+ * data, including padding of prefix of terminal symbol code. This
+ * function always succeeds.
+ */
+size_t nghttp2_hd_huff_encode_count(const uint8_t *src, size_t len);
+
+/*
+ * Encodes the given data |src| with length |srclen| to the |bufs|.
+ * This function expands extra buffers in |bufs| if necessary.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_BUFFER_ERROR
+ *     Out of buffer space.
+ */
+int nghttp2_hd_huff_encode(nghttp2_bufs *bufs, const uint8_t *src,
+                           size_t srclen);
+
+void nghttp2_hd_huff_decode_context_init(nghttp2_hd_huff_decode_context *ctx);
+
+/*
+ * Decodes the given data |src| with length |srclen|.  The |ctx| must
+ * be initialized by nghttp2_hd_huff_decode_context_init(). The result
+ * will be written to |buf|.  This function assumes that |buf| has the
+ * enough room to store the decoded byte string.
+ *
+ * The caller must set the |fin| to nonzero if the given input is the
+ * final block.
+ *
+ * This function returns the number of read bytes from the |in|.
+ *
+ * If this function fails, it returns one of the following negative
+ * return codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_HEADER_COMP
+ *     Decoding process has failed.
+ */
+ssize_t nghttp2_hd_huff_decode(nghttp2_hd_huff_decode_context *ctx,
+                               nghttp2_buf *buf, const uint8_t *src,
+                               size_t srclen, int fin);
+
+/*
+ * nghttp2_hd_huff_decode_failure_state returns nonzero if |ctx|
+ * indicates that huffman decoding context is in failure state.
+ */
+int nghttp2_hd_huff_decode_failure_state(nghttp2_hd_huff_decode_context *ctx);
+
+#endif /* NGHTTP2_HD_H */

lib/nghttp2_hd_huffman.c

@@ -0,0 +1,144 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2013 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_hd_huffman.h"
+
+#include <string.h>
+#include <assert.h>
+#include <stdio.h>
+
+#include "nghttp2_hd.h"
+#include "nghttp2_net.h"
+
+size_t nghttp2_hd_huff_encode_count(const uint8_t *src, size_t len) {
+  size_t i;
+  size_t nbits = 0;
+
+  for (i = 0; i < len; ++i) {
+    nbits += huff_sym_table[src[i]].nbits;
+  }
+  /* pad the prefix of EOS (256) */
+  return (nbits + 7) / 8;
+}
+
+int nghttp2_hd_huff_encode(nghttp2_bufs *bufs, const uint8_t *src,
+                           size_t srclen) {
+  const nghttp2_huff_sym *sym;
+  const uint8_t *end = src + srclen;
+  uint64_t code = 0;
+  uint32_t x;
+  size_t nbits = 0;
+  size_t avail;
+  int rv;
+
+  avail = nghttp2_bufs_cur_avail(bufs);
+
+  for (; src != end;) {
+    sym = &huff_sym_table[*src++];
+    code |= (uint64_t)sym->code << (32 - nbits);
+    nbits += sym->nbits;
+    if (nbits < 32) {
+      continue;
+    }
+    if (avail >= 4) {
+      x = htonl((uint32_t)(code >> 32));
+      memcpy(bufs->cur->buf.last, &x, 4);
+      bufs->cur->buf.last += 4;
+      avail -= 4;
+      code <<= 32;
+      nbits -= 32;
+      continue;
+    }
+
+    for (; nbits >= 8;) {
+      rv = nghttp2_bufs_addb(bufs, (uint8_t)(code >> 56));
+      if (rv != 0) {
+        return rv;
+      }
+      code <<= 8;
+      nbits -= 8;
+    }
+
+    avail = nghttp2_bufs_cur_avail(bufs);
+  }
+
+  for (; nbits >= 8;) {
+    rv = nghttp2_bufs_addb(bufs, (uint8_t)(code >> 56));
+    if (rv != 0) {
+      return rv;
+    }
+    code <<= 8;
+    nbits -= 8;
+  }
+
+  if (nbits) {
+    rv = nghttp2_bufs_addb(
+        bufs, (uint8_t)((uint8_t)(code >> 56) | ((1 << (8 - nbits)) - 1)));
+    if (rv != 0) {
+      return rv;
+    }
+  }
+
+  return 0;
+}
+
+void nghttp2_hd_huff_decode_context_init(nghttp2_hd_huff_decode_context *ctx) {
+  ctx->fstate = NGHTTP2_HUFF_ACCEPTED;
+}
+
+ssize_t nghttp2_hd_huff_decode(nghttp2_hd_huff_decode_context *ctx,
+                               nghttp2_buf *buf, const uint8_t *src,
+                               size_t srclen, int final) {
+  const uint8_t *end = src + srclen;
+  nghttp2_huff_decode node = {ctx->fstate, 0};
+  const nghttp2_huff_decode *t = &node;
+  uint8_t c;
+
+  /* We use the decoding algorithm described in
+     http://graphics.ics.uci.edu/pub/Prefix.pdf */
+  for (; src != end;) {
+    c = *src++;
+    t = &huff_decode_table[t->fstate & 0x1ff][c >> 4];
+    if (t->fstate & NGHTTP2_HUFF_SYM) {
+      *buf->last++ = t->sym;
+    }
+
+    t = &huff_decode_table[t->fstate & 0x1ff][c & 0xf];
+    if (t->fstate & NGHTTP2_HUFF_SYM) {
+      *buf->last++ = t->sym;
+    }
+  }
+
+  ctx->fstate = t->fstate;
+
+  if (final && !(ctx->fstate & NGHTTP2_HUFF_ACCEPTED)) {
+    return NGHTTP2_ERR_HEADER_COMP;
+  }
+
+  return (ssize_t)srclen;
+}
+
+int nghttp2_hd_huff_decode_failure_state(nghttp2_hd_huff_decode_context *ctx) {
+  return ctx->fstate == 0x100;
+}

lib/nghttp2_hd_huffman.h

@@ -0,0 +1,72 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2013 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_HD_HUFFMAN_H
+#define NGHTTP2_HD_HUFFMAN_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+
+typedef enum {
+  /* FSA accepts this state as the end of huffman encoding
+     sequence. */
+  NGHTTP2_HUFF_ACCEPTED = 1 << 14,
+  /* This state emits symbol */
+  NGHTTP2_HUFF_SYM = 1 << 15,
+} nghttp2_huff_decode_flag;
+
+typedef struct {
+  /* fstate is the current huffman decoding state, which is actually
+     the node ID of internal huffman tree with
+     nghttp2_huff_decode_flag OR-ed.  We have 257 leaf nodes, but they
+     are identical to root node other than emitting a symbol, so we
+     have 256 internal nodes [1..255], inclusive.  The node ID 256 is
+     a special node and it is a terminal state that means decoding
+     failed. */
+  uint16_t fstate;
+  /* symbol if NGHTTP2_HUFF_SYM flag set */
+  uint8_t sym;
+} nghttp2_huff_decode;
+
+typedef nghttp2_huff_decode huff_decode_table_type[16];
+
+typedef struct {
+  /* fstate is the current huffman decoding state. */
+  uint16_t fstate;
+} nghttp2_hd_huff_decode_context;
+
+typedef struct {
+  /* The number of bits in this code */
+  uint32_t nbits;
+  /* Huffman code aligned to LSB */
+  uint32_t code;
+} nghttp2_huff_sym;
+
+extern const nghttp2_huff_sym huff_sym_table[];
+extern const nghttp2_huff_decode huff_decode_table[][16];
+
+#endif /* NGHTTP2_HD_HUFFMAN_H */

lib/nghttp2_hd_huffman_data.c

@@ -0,0 +1,4980 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2013 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_hd_huffman.h"
+
+/* Generated by mkhufftbl.py */
+
+const nghttp2_huff_sym huff_sym_table[] = {
+    {13, 0xffc00000u}, {23, 0xffffb000u}, {28, 0xfffffe20u}, {28, 0xfffffe30u},
+    {28, 0xfffffe40u}, {28, 0xfffffe50u}, {28, 0xfffffe60u}, {28, 0xfffffe70u},
+    {28, 0xfffffe80u}, {24, 0xffffea00u}, {30, 0xfffffff0u}, {28, 0xfffffe90u},
+    {28, 0xfffffea0u}, {30, 0xfffffff4u}, {28, 0xfffffeb0u}, {28, 0xfffffec0u},
+    {28, 0xfffffed0u}, {28, 0xfffffee0u}, {28, 0xfffffef0u}, {28, 0xffffff00u},
+    {28, 0xffffff10u}, {28, 0xffffff20u}, {30, 0xfffffff8u}, {28, 0xffffff30u},
+    {28, 0xffffff40u}, {28, 0xffffff50u}, {28, 0xffffff60u}, {28, 0xffffff70u},
+    {28, 0xffffff80u}, {28, 0xffffff90u}, {28, 0xffffffa0u}, {28, 0xffffffb0u},
+    {6, 0x50000000u},  {10, 0xfe000000u}, {10, 0xfe400000u}, {12, 0xffa00000u},
+    {13, 0xffc80000u}, {6, 0x54000000u},  {8, 0xf8000000u},  {11, 0xff400000u},
+    {10, 0xfe800000u}, {10, 0xfec00000u}, {8, 0xf9000000u},  {11, 0xff600000u},
+    {8, 0xfa000000u},  {6, 0x58000000u},  {6, 0x5c000000u},  {6, 0x60000000u},
+    {5, 0x0u},         {5, 0x8000000u},   {5, 0x10000000u},  {6, 0x64000000u},
+    {6, 0x68000000u},  {6, 0x6c000000u},  {6, 0x70000000u},  {6, 0x74000000u},
+    {6, 0x78000000u},  {6, 0x7c000000u},  {7, 0xb8000000u},  {8, 0xfb000000u},
+    {15, 0xfff80000u}, {6, 0x80000000u},  {12, 0xffb00000u}, {10, 0xff000000u},
+    {13, 0xffd00000u}, {6, 0x84000000u},  {7, 0xba000000u},  {7, 0xbc000000u},
+    {7, 0xbe000000u},  {7, 0xc0000000u},  {7, 0xc2000000u},  {7, 0xc4000000u},
+    {7, 0xc6000000u},  {7, 0xc8000000u},  {7, 0xca000000u},  {7, 0xcc000000u},
+    {7, 0xce000000u},  {7, 0xd0000000u},  {7, 0xd2000000u},  {7, 0xd4000000u},
+    {7, 0xd6000000u},  {7, 0xd8000000u},  {7, 0xda000000u},  {7, 0xdc000000u},
+    {7, 0xde000000u},  {7, 0xe0000000u},  {7, 0xe2000000u},  {7, 0xe4000000u},
+    {8, 0xfc000000u},  {7, 0xe6000000u},  {8, 0xfd000000u},  {13, 0xffd80000u},
+    {19, 0xfffe0000u}, {13, 0xffe00000u}, {14, 0xfff00000u}, {6, 0x88000000u},
+    {15, 0xfffa0000u}, {5, 0x18000000u},  {6, 0x8c000000u},  {5, 0x20000000u},
+    {6, 0x90000000u},  {5, 0x28000000u},  {6, 0x94000000u},  {6, 0x98000000u},
+    {6, 0x9c000000u},  {5, 0x30000000u},  {7, 0xe8000000u},  {7, 0xea000000u},
+    {6, 0xa0000000u},  {6, 0xa4000000u},  {6, 0xa8000000u},  {5, 0x38000000u},
+    {6, 0xac000000u},  {7, 0xec000000u},  {6, 0xb0000000u},  {5, 0x40000000u},
+    {5, 0x48000000u},  {6, 0xb4000000u},  {7, 0xee000000u},  {7, 0xf0000000u},
+    {7, 0xf2000000u},  {7, 0xf4000000u},  {7, 0xf6000000u},  {15, 0xfffc0000u},
+    {11, 0xff800000u}, {14, 0xfff40000u}, {13, 0xffe80000u}, {28, 0xffffffc0u},
+    {20, 0xfffe6000u}, {22, 0xffff4800u}, {20, 0xfffe7000u}, {20, 0xfffe8000u},
+    {22, 0xffff4c00u}, {22, 0xffff5000u}, {22, 0xffff5400u}, {23, 0xffffb200u},
+    {22, 0xffff5800u}, {23, 0xffffb400u}, {23, 0xffffb600u}, {23, 0xffffb800u},
+    {23, 0xffffba00u}, {23, 0xffffbc00u}, {24, 0xffffeb00u}, {23, 0xffffbe00u},
+    {24, 0xffffec00u}, {24, 0xffffed00u}, {22, 0xffff5c00u}, {23, 0xffffc000u},
+    {24, 0xffffee00u}, {23, 0xffffc200u}, {23, 0xffffc400u}, {23, 0xffffc600u},
+    {23, 0xffffc800u}, {21, 0xfffee000u}, {22, 0xffff6000u}, {23, 0xffffca00u},
+    {22, 0xffff6400u}, {23, 0xffffcc00u}, {23, 0xffffce00u}, {24, 0xffffef00u},
+    {22, 0xffff6800u}, {21, 0xfffee800u}, {20, 0xfffe9000u}, {22, 0xffff6c00u},
+    {22, 0xffff7000u}, {23, 0xffffd000u}, {23, 0xffffd200u}, {21, 0xfffef000u},
+    {23, 0xffffd400u}, {22, 0xffff7400u}, {22, 0xffff7800u}, {24, 0xfffff000u},
+    {21, 0xfffef800u}, {22, 0xffff7c00u}, {23, 0xffffd600u}, {23, 0xffffd800u},
+    {21, 0xffff0000u}, {21, 0xffff0800u}, {22, 0xffff8000u}, {21, 0xffff1000u},
+    {23, 0xffffda00u}, {22, 0xffff8400u}, {23, 0xffffdc00u}, {23, 0xffffde00u},
+    {20, 0xfffea000u}, {22, 0xffff8800u}, {22, 0xffff8c00u}, {22, 0xffff9000u},
+    {23, 0xffffe000u}, {22, 0xffff9400u}, {22, 0xffff9800u}, {23, 0xffffe200u},
+    {26, 0xfffff800u}, {26, 0xfffff840u}, {20, 0xfffeb000u}, {19, 0xfffe2000u},
+    {22, 0xffff9c00u}, {23, 0xffffe400u}, {22, 0xffffa000u}, {25, 0xfffff600u},
+    {26, 0xfffff880u}, {26, 0xfffff8c0u}, {26, 0xfffff900u}, {27, 0xfffffbc0u},
+    {27, 0xfffffbe0u}, {26, 0xfffff940u}, {24, 0xfffff100u}, {25, 0xfffff680u},
+    {19, 0xfffe4000u}, {21, 0xffff1800u}, {26, 0xfffff980u}, {27, 0xfffffc00u},
+    {27, 0xfffffc20u}, {26, 0xfffff9c0u}, {27, 0xfffffc40u}, {24, 0xfffff200u},
+    {21, 0xffff2000u}, {21, 0xffff2800u}, {26, 0xfffffa00u}, {26, 0xfffffa40u},
+    {28, 0xffffffd0u}, {27, 0xfffffc60u}, {27, 0xfffffc80u}, {27, 0xfffffca0u},
+    {20, 0xfffec000u}, {24, 0xfffff300u}, {20, 0xfffed000u}, {21, 0xffff3000u},
+    {22, 0xffffa400u}, {21, 0xffff3800u}, {21, 0xffff4000u}, {23, 0xffffe600u},
+    {22, 0xffffa800u}, {22, 0xffffac00u}, {25, 0xfffff700u}, {25, 0xfffff780u},
+    {24, 0xfffff400u}, {24, 0xfffff500u}, {26, 0xfffffa80u}, {23, 0xffffe800u},
+    {26, 0xfffffac0u}, {27, 0xfffffcc0u}, {26, 0xfffffb00u}, {26, 0xfffffb40u},
+    {27, 0xfffffce0u}, {27, 0xfffffd00u}, {27, 0xfffffd20u}, {27, 0xfffffd40u},
+    {27, 0xfffffd60u}, {28, 0xffffffe0u}, {27, 0xfffffd80u}, {27, 0xfffffda0u},
+    {27, 0xfffffdc0u}, {27, 0xfffffde0u}, {27, 0xfffffe00u}, {26, 0xfffffb80u},
+    {30, 0xfffffffcu}};
+
+const nghttp2_huff_decode huff_decode_table[][16] = {
+    /* 0 */
+    {
+        {0x04, 0},
+        {0x05, 0},
+        {0x07, 0},
+        {0x08, 0},
+        {0x0b, 0},
+        {0x0c, 0},
+        {0x10, 0},
+        {0x13, 0},
+        {0x19, 0},
+        {0x1c, 0},
+        {0x20, 0},
+        {0x23, 0},
+        {0x2a, 0},
+        {0x31, 0},
+        {0x39, 0},
+        {0x4040, 0},
+    },
+    /* 1 */
+    {
+        {0xc000, 48},
+        {0xc000, 49},
+        {0xc000, 50},
+        {0xc000, 97},
+        {0xc000, 99},
+        {0xc000, 101},
+        {0xc000, 105},
+        {0xc000, 111},
+        {0xc000, 115},
+        {0xc000, 116},
+        {0x0d, 0},
+        {0x0e, 0},
+        {0x11, 0},
+        {0x12, 0},
+        {0x14, 0},
+        {0x15, 0},
+    },
+    /* 2 */
+    {
+        {0x8001, 48},
+        {0xc016, 48},
+        {0x8001, 49},
+        {0xc016, 49},
+        {0x8001, 50},
+        {0xc016, 50},
+        {0x8001, 97},
+        {0xc016, 97},
+        {0x8001, 99},
+        {0xc016, 99},
+        {0x8001, 101},
+        {0xc016, 101},
+        {0x8001, 105},
+        {0xc016, 105},
+        {0x8001, 111},
+        {0xc016, 111},
+    },
+    /* 3 */
+    {
+        {0x8002, 48},
+        {0x8009, 48},
+        {0x8017, 48},
+        {0xc028, 48},
+        {0x8002, 49},
+        {0x8009, 49},
+        {0x8017, 49},
+        {0xc028, 49},
+        {0x8002, 50},
+        {0x8009, 50},
+        {0x8017, 50},
+        {0xc028, 50},
+        {0x8002, 97},
+        {0x8009, 97},
+        {0x8017, 97},
+        {0xc028, 97},
+    },
+    /* 4 */
+    {
+        {0x8003, 48},
+        {0x8006, 48},
+        {0x800a, 48},
+        {0x800f, 48},
+        {0x8018, 48},
+        {0x801f, 48},
+        {0x8029, 48},
+        {0xc038, 48},
+        {0x8003, 49},
+        {0x8006, 49},
+        {0x800a, 49},
+        {0x800f, 49},
+        {0x8018, 49},
+        {0x801f, 49},
+        {0x8029, 49},
+        {0xc038, 49},
+    },
+    /* 5 */
+    {
+        {0x8003, 50},
+        {0x8006, 50},
+        {0x800a, 50},
+        {0x800f, 50},
+        {0x8018, 50},
+        {0x801f, 50},
+        {0x8029, 50},
+        {0xc038, 50},
+        {0x8003, 97},
+        {0x8006, 97},
+        {0x800a, 97},
+        {0x800f, 97},
+        {0x8018, 97},
+        {0x801f, 97},
+        {0x8029, 97},
+        {0xc038, 97},
+    },
+    /* 6 */
+    {
+        {0x8002, 99},
+        {0x8009, 99},
+        {0x8017, 99},
+        {0xc028, 99},
+        {0x8002, 101},
+        {0x8009, 101},
+        {0x8017, 101},
+        {0xc028, 101},
+        {0x8002, 105},
+        {0x8009, 105},
+        {0x8017, 105},
+        {0xc028, 105},
+        {0x8002, 111},
+        {0x8009, 111},
+        {0x8017, 111},
+        {0xc028, 111},
+    },
+    /* 7 */
+    {
+        {0x8003, 99},
+        {0x8006, 99},
+        {0x800a, 99},
+        {0x800f, 99},
+        {0x8018, 99},
+        {0x801f, 99},
+        {0x8029, 99},
+        {0xc038, 99},
+        {0x8003, 101},
+        {0x8006, 101},
+        {0x800a, 101},
+        {0x800f, 101},
+        {0x8018, 101},
+        {0x801f, 101},
+        {0x8029, 101},
+        {0xc038, 101},
+    },
+    /* 8 */
+    {
+        {0x8003, 105},
+        {0x8006, 105},
+        {0x800a, 105},
+        {0x800f, 105},
+        {0x8018, 105},
+        {0x801f, 105},
+        {0x8029, 105},
+        {0xc038, 105},
+        {0x8003, 111},
+        {0x8006, 111},
+        {0x800a, 111},
+        {0x800f, 111},
+        {0x8018, 111},
+        {0x801f, 111},
+        {0x8029, 111},
+        {0xc038, 111},
+    },
+    /* 9 */
+    {
+        {0x8001, 115},
+        {0xc016, 115},
+        {0x8001, 116},
+        {0xc016, 116},
+        {0xc000, 32},
+        {0xc000, 37},
+        {0xc000, 45},
+        {0xc000, 46},
+        {0xc000, 47},
+        {0xc000, 51},
+        {0xc000, 52},
+        {0xc000, 53},
+        {0xc000, 54},
+        {0xc000, 55},
+        {0xc000, 56},
+        {0xc000, 57},
+    },
+    /* 10 */
+    {
+        {0x8002, 115},
+        {0x8009, 115},
+        {0x8017, 115},
+        {0xc028, 115},
+        {0x8002, 116},
+        {0x8009, 116},
+        {0x8017, 116},
+        {0xc028, 116},
+        {0x8001, 32},
+        {0xc016, 32},
+        {0x8001, 37},
+        {0xc016, 37},
+        {0x8001, 45},
+        {0xc016, 45},
+        {0x8001, 46},
+        {0xc016, 46},
+    },
+    /* 11 */
+    {
+        {0x8003, 115},
+        {0x8006, 115},
+        {0x800a, 115},
+        {0x800f, 115},
+        {0x8018, 115},
+        {0x801f, 115},
+        {0x8029, 115},
+        {0xc038, 115},
+        {0x8003, 116},
+        {0x8006, 116},
+        {0x800a, 116},
+        {0x800f, 116},
+        {0x8018, 116},
+        {0x801f, 116},
+        {0x8029, 116},
+        {0xc038, 116},
+    },
+    /* 12 */
+    {
+        {0x8002, 32},
+        {0x8009, 32},
+        {0x8017, 32},
+        {0xc028, 32},
+        {0x8002, 37},
+        {0x8009, 37},
+        {0x8017, 37},
+        {0xc028, 37},
+        {0x8002, 45},
+        {0x8009, 45},
+        {0x8017, 45},
+        {0xc028, 45},
+        {0x8002, 46},
+        {0x8009, 46},
+        {0x8017, 46},
+        {0xc028, 46},
+    },
+    /* 13 */
+    {
+        {0x8003, 32},
+        {0x8006, 32},
+        {0x800a, 32},
+        {0x800f, 32},
+        {0x8018, 32},
+        {0x801f, 32},
+        {0x8029, 32},
+        {0xc038, 32},
+        {0x8003, 37},
+        {0x8006, 37},
+        {0x800a, 37},
+        {0x800f, 37},
+        {0x8018, 37},
+        {0x801f, 37},
+        {0x8029, 37},
+        {0xc038, 37},
+    },
+    /* 14 */
+    {
+        {0x8003, 45},
+        {0x8006, 45},
+        {0x800a, 45},
+        {0x800f, 45},
+        {0x8018, 45},
+        {0x801f, 45},
+        {0x8029, 45},
+        {0xc038, 45},
+        {0x8003, 46},
+        {0x8006, 46},
+        {0x800a, 46},
+        {0x800f, 46},
+        {0x8018, 46},
+        {0x801f, 46},
+        {0x8029, 46},
+        {0xc038, 46},
+    },
+    /* 15 */
+    {
+        {0x8001, 47},
+        {0xc016, 47},
+        {0x8001, 51},
+        {0xc016, 51},
+        {0x8001, 52},
+        {0xc016, 52},
+        {0x8001, 53},
+        {0xc016, 53},
+        {0x8001, 54},
+        {0xc016, 54},
+        {0x8001, 55},
+        {0xc016, 55},
+        {0x8001, 56},
+        {0xc016, 56},
+        {0x8001, 57},
+        {0xc016, 57},
+    },
+    /* 16 */
+    {
+        {0x8002, 47},
+        {0x8009, 47},
+        {0x8017, 47},
+        {0xc028, 47},
+        {0x8002, 51},
+        {0x8009, 51},
+        {0x8017, 51},
+        {0xc028, 51},
+        {0x8002, 52},
+        {0x8009, 52},
+        {0x8017, 52},
+        {0xc028, 52},
+        {0x8002, 53},
+        {0x8009, 53},
+        {0x8017, 53},
+        {0xc028, 53},
+    },
+    /* 17 */
+    {
+        {0x8003, 47},
+        {0x8006, 47},
+        {0x800a, 47},
+        {0x800f, 47},
+        {0x8018, 47},
+        {0x801f, 47},
+        {0x8029, 47},
+        {0xc038, 47},
+        {0x8003, 51},
+        {0x8006, 51},
+        {0x800a, 51},
+        {0x800f, 51},
+        {0x8018, 51},
+        {0x801f, 51},
+        {0x8029, 51},
+        {0xc038, 51},
+    },
+    /* 18 */
+    {
+        {0x8003, 52},
+        {0x8006, 52},
+        {0x800a, 52},
+        {0x800f, 52},
+        {0x8018, 52},
+        {0x801f, 52},
+        {0x8029, 52},
+        {0xc038, 52},
+        {0x8003, 53},
+        {0x8006, 53},
+        {0x800a, 53},
+        {0x800f, 53},
+        {0x8018, 53},
+        {0x801f, 53},
+        {0x8029, 53},
+        {0xc038, 53},
+    },
+    /* 19 */
+    {
+        {0x8002, 54},
+        {0x8009, 54},
+        {0x8017, 54},
+        {0xc028, 54},
+        {0x8002, 55},
+        {0x8009, 55},
+        {0x8017, 55},
+        {0xc028, 55},
+        {0x8002, 56},
+        {0x8009, 56},
+        {0x8017, 56},
+        {0xc028, 56},
+        {0x8002, 57},
+        {0x8009, 57},
+        {0x8017, 57},
+        {0xc028, 57},
+    },
+    /* 20 */
+    {
+        {0x8003, 54},
+        {0x8006, 54},
+        {0x800a, 54},
+        {0x800f, 54},
+        {0x8018, 54},
+        {0x801f, 54},
+        {0x8029, 54},
+        {0xc038, 54},
+        {0x8003, 55},
+        {0x8006, 55},
+        {0x800a, 55},
+        {0x800f, 55},
+        {0x8018, 55},
+        {0x801f, 55},
+        {0x8029, 55},
+        {0xc038, 55},
+    },
+    /* 21 */
+    {
+        {0x8003, 56},
+        {0x8006, 56},
+        {0x800a, 56},
+        {0x800f, 56},
+        {0x8018, 56},
+        {0x801f, 56},
+        {0x8029, 56},
+        {0xc038, 56},
+        {0x8003, 57},
+        {0x8006, 57},
+        {0x800a, 57},
+        {0x800f, 57},
+        {0x8018, 57},
+        {0x801f, 57},
+        {0x8029, 57},
+        {0xc038, 57},
+    },
+    /* 22 */
+    {
+        {0x1a, 0},
+        {0x1b, 0},
+        {0x1d, 0},
+        {0x1e, 0},
+        {0x21, 0},
+        {0x22, 0},
+        {0x24, 0},
+        {0x25, 0},
+        {0x2b, 0},
+        {0x2e, 0},
+        {0x32, 0},
+        {0x35, 0},
+        {0x3a, 0},
+        {0x3d, 0},
+        {0x41, 0},
+        {0x4044, 0},
+    },
+    /* 23 */
+    {
+        {0xc000, 61},
+        {0xc000, 65},
+        {0xc000, 95},
+        {0xc000, 98},
+        {0xc000, 100},
+        {0xc000, 102},
+        {0xc000, 103},
+        {0xc000, 104},
+        {0xc000, 108},
+        {0xc000, 109},
+        {0xc000, 110},
+        {0xc000, 112},
+        {0xc000, 114},
+        {0xc000, 117},
+        {0x26, 0},
+        {0x27, 0},
+    },
+    /* 24 */
+    {
+        {0x8001, 61},
+        {0xc016, 61},
+        {0x8001, 65},
+        {0xc016, 65},
+        {0x8001, 95},
+        {0xc016, 95},
+        {0x8001, 98},
+        {0xc016, 98},
+        {0x8001, 100},
+        {0xc016, 100},
+        {0x8001, 102},
+        {0xc016, 102},
+        {0x8001, 103},
+        {0xc016, 103},
+        {0x8001, 104},
+        {0xc016, 104},
+    },
+    /* 25 */
+    {
+        {0x8002, 61},
+        {0x8009, 61},
+        {0x8017, 61},
+        {0xc028, 61},
+        {0x8002, 65},
+        {0x8009, 65},
+        {0x8017, 65},
+        {0xc028, 65},
+        {0x8002, 95},
+        {0x8009, 95},
+        {0x8017, 95},
+        {0xc028, 95},
+        {0x8002, 98},
+        {0x8009, 98},
+        {0x8017, 98},
+        {0xc028, 98},
+    },
+    /* 26 */
+    {
+        {0x8003, 61},
+        {0x8006, 61},
+        {0x800a, 61},
+        {0x800f, 61},
+        {0x8018, 61},
+        {0x801f, 61},
+        {0x8029, 61},
+        {0xc038, 61},
+        {0x8003, 65},
+        {0x8006, 65},
+        {0x800a, 65},
+        {0x800f, 65},
+        {0x8018, 65},
+        {0x801f, 65},
+        {0x8029, 65},
+        {0xc038, 65},
+    },
+    /* 27 */
+    {
+        {0x8003, 95},
+        {0x8006, 95},
+        {0x800a, 95},
+        {0x800f, 95},
+        {0x8018, 95},
+        {0x801f, 95},
+        {0x8029, 95},
+        {0xc038, 95},
+        {0x8003, 98},
+        {0x8006, 98},
+        {0x800a, 98},
+        {0x800f, 98},
+        {0x8018, 98},
+        {0x801f, 98},
+        {0x8029, 98},
+        {0xc038, 98},
+    },
+    /* 28 */
+    {
+        {0x8002, 100},
+        {0x8009, 100},
+        {0x8017, 100},
+        {0xc028, 100},
+        {0x8002, 102},
+        {0x8009, 102},
+        {0x8017, 102},
+        {0xc028, 102},
+        {0x8002, 103},
+        {0x8009, 103},
+        {0x8017, 103},
+        {0xc028, 103},
+        {0x8002, 104},
+        {0x8009, 104},
+        {0x8017, 104},
+        {0xc028, 104},
+    },
+    /* 29 */
+    {
+        {0x8003, 100},
+        {0x8006, 100},
+        {0x800a, 100},
+        {0x800f, 100},
+        {0x8018, 100},
+        {0x801f, 100},
+        {0x8029, 100},
+        {0xc038, 100},
+        {0x8003, 102},
+        {0x8006, 102},
+        {0x800a, 102},
+        {0x800f, 102},
+        {0x8018, 102},
+        {0x801f, 102},
+        {0x8029, 102},
+        {0xc038, 102},
+    },
+    /* 30 */
+    {
+        {0x8003, 103},
+        {0x8006, 103},
+        {0x800a, 103},
+        {0x800f, 103},
+        {0x8018, 103},
+        {0x801f, 103},
+        {0x8029, 103},
+        {0xc038, 103},
+        {0x8003, 104},
+        {0x8006, 104},
+        {0x800a, 104},
+        {0x800f, 104},
+        {0x8018, 104},
+        {0x801f, 104},
+        {0x8029, 104},
+        {0xc038, 104},
+    },
+    /* 31 */
+    {
+        {0x8001, 108},
+        {0xc016, 108},
+        {0x8001, 109},
+        {0xc016, 109},
+        {0x8001, 110},
+        {0xc016, 110},
+        {0x8001, 112},
+        {0xc016, 112},
+        {0x8001, 114},
+        {0xc016, 114},
+        {0x8001, 117},
+        {0xc016, 117},
+        {0xc000, 58},
+        {0xc000, 66},
+        {0xc000, 67},
+        {0xc000, 68},
+    },
+    /* 32 */
+    {
+        {0x8002, 108},
+        {0x8009, 108},
+        {0x8017, 108},
+        {0xc028, 108},
+        {0x8002, 109},
+        {0x8009, 109},
+        {0x8017, 109},
+        {0xc028, 109},
+        {0x8002, 110},
+        {0x8009, 110},
+        {0x8017, 110},
+        {0xc028, 110},
+        {0x8002, 112},
+        {0x8009, 112},
+        {0x8017, 112},
+        {0xc028, 112},
+    },
+    /* 33 */
+    {
+        {0x8003, 108},
+        {0x8006, 108},
+        {0x800a, 108},
+        {0x800f, 108},
+        {0x8018, 108},
+        {0x801f, 108},
+        {0x8029, 108},
+        {0xc038, 108},
+        {0x8003, 109},
+        {0x8006, 109},
+        {0x800a, 109},
+        {0x800f, 109},
+        {0x8018, 109},
+        {0x801f, 109},
+        {0x8029, 109},
+        {0xc038, 109},
+    },
+    /* 34 */
+    {
+        {0x8003, 110},
+        {0x8006, 110},
+        {0x800a, 110},
+        {0x800f, 110},
+        {0x8018, 110},
+        {0x801f, 110},
+        {0x8029, 110},
+        {0xc038, 110},
+        {0x8003, 112},
+        {0x8006, 112},
+        {0x800a, 112},
+        {0x800f, 112},
+        {0x8018, 112},
+        {0x801f, 112},
+        {0x8029, 112},
+        {0xc038, 112},
+    },
+    /* 35 */
+    {
+        {0x8002, 114},
+        {0x8009, 114},
+        {0x8017, 114},
+        {0xc028, 114},
+        {0x8002, 117},
+        {0x8009, 117},
+        {0x8017, 117},
+        {0xc028, 117},
+        {0x8001, 58},
+        {0xc016, 58},
+        {0x8001, 66},
+        {0xc016, 66},
+        {0x8001, 67},
+        {0xc016, 67},
+        {0x8001, 68},
+        {0xc016, 68},
+    },
+    /* 36 */
+    {
+        {0x8003, 114},
+        {0x8006, 114},
+        {0x800a, 114},
+        {0x800f, 114},
+        {0x8018, 114},
+        {0x801f, 114},
+        {0x8029, 114},
+        {0xc038, 114},
+        {0x8003, 117},
+        {0x8006, 117},
+        {0x800a, 117},
+        {0x800f, 117},
+        {0x8018, 117},
+        {0x801f, 117},
+        {0x8029, 117},
+        {0xc038, 117},
+    },
+    /* 37 */
+    {
+        {0x8002, 58},
+        {0x8009, 58},
+        {0x8017, 58},
+        {0xc028, 58},
+        {0x8002, 66},
+        {0x8009, 66},
+        {0x8017, 66},
+        {0xc028, 66},
+        {0x8002, 67},
+        {0x8009, 67},
+        {0x8017, 67},
+        {0xc028, 67},
+        {0x8002, 68},
+        {0x8009, 68},
+        {0x8017, 68},
+        {0xc028, 68},
+    },
+    /* 38 */
+    {
+        {0x8003, 58},
+        {0x8006, 58},
+        {0x800a, 58},
+        {0x800f, 58},
+        {0x8018, 58},
+        {0x801f, 58},
+        {0x8029, 58},
+        {0xc038, 58},
+        {0x8003, 66},
+        {0x8006, 66},
+        {0x800a, 66},
+        {0x800f, 66},
+        {0x8018, 66},
+        {0x801f, 66},
+        {0x8029, 66},
+        {0xc038, 66},
+    },
+    /* 39 */
+    {
+        {0x8003, 67},
+        {0x8006, 67},
+        {0x800a, 67},
+        {0x800f, 67},
+        {0x8018, 67},
+        {0x801f, 67},
+        {0x8029, 67},
+        {0xc038, 67},
+        {0x8003, 68},
+        {0x8006, 68},
+        {0x800a, 68},
+        {0x800f, 68},
+        {0x8018, 68},
+        {0x801f, 68},
+        {0x8029, 68},
+        {0xc038, 68},
+    },
+    /* 40 */
+    {
+        {0x2c, 0},
+        {0x2d, 0},
+        {0x2f, 0},
+        {0x30, 0},
+        {0x33, 0},
+        {0x34, 0},
+        {0x36, 0},
+        {0x37, 0},
+        {0x3b, 0},
+        {0x3c, 0},
+        {0x3e, 0},
+        {0x3f, 0},
+        {0x42, 0},
+        {0x43, 0},
+        {0x45, 0},
+        {0x4048, 0},
+    },
+    /* 41 */
+    {
+        {0xc000, 69},
+        {0xc000, 70},
+        {0xc000, 71},
+        {0xc000, 72},
+        {0xc000, 73},
+        {0xc000, 74},
+        {0xc000, 75},
+        {0xc000, 76},
+        {0xc000, 77},
+        {0xc000, 78},
+        {0xc000, 79},
+        {0xc000, 80},
+        {0xc000, 81},
+        {0xc000, 82},
+        {0xc000, 83},
+        {0xc000, 84},
+    },
+    /* 42 */
+    {
+        {0x8001, 69},
+        {0xc016, 69},
+        {0x8001, 70},
+        {0xc016, 70},
+        {0x8001, 71},
+        {0xc016, 71},
+        {0x8001, 72},
+        {0xc016, 72},
+        {0x8001, 73},
+        {0xc016, 73},
+        {0x8001, 74},
+        {0xc016, 74},
+        {0x8001, 75},
+        {0xc016, 75},
+        {0x8001, 76},
+        {0xc016, 76},
+    },
+    /* 43 */
+    {
+        {0x8002, 69},
+        {0x8009, 69},
+        {0x8017, 69},
+        {0xc028, 69},
+        {0x8002, 70},
+        {0x8009, 70},
+        {0x8017, 70},
+        {0xc028, 70},
+        {0x8002, 71},
+        {0x8009, 71},
+        {0x8017, 71},
+        {0xc028, 71},
+        {0x8002, 72},
+        {0x8009, 72},
+        {0x8017, 72},
+        {0xc028, 72},
+    },
+    /* 44 */
+    {
+        {0x8003, 69},
+        {0x8006, 69},
+        {0x800a, 69},
+        {0x800f, 69},
+        {0x8018, 69},
+        {0x801f, 69},
+        {0x8029, 69},
+        {0xc038, 69},
+        {0x8003, 70},
+        {0x8006, 70},
+        {0x800a, 70},
+        {0x800f, 70},
+        {0x8018, 70},
+        {0x801f, 70},
+        {0x8029, 70},
+        {0xc038, 70},
+    },
+    /* 45 */
+    {
+        {0x8003, 71},
+        {0x8006, 71},
+        {0x800a, 71},
+        {0x800f, 71},
+        {0x8018, 71},
+        {0x801f, 71},
+        {0x8029, 71},
+        {0xc038, 71},
+        {0x8003, 72},
+        {0x8006, 72},
+        {0x800a, 72},
+        {0x800f, 72},
+        {0x8018, 72},
+        {0x801f, 72},
+        {0x8029, 72},
+        {0xc038, 72},
+    },
+    /* 46 */
+    {
+        {0x8002, 73},
+        {0x8009, 73},
+        {0x8017, 73},
+        {0xc028, 73},
+        {0x8002, 74},
+        {0x8009, 74},
+        {0x8017, 74},
+        {0xc028, 74},
+        {0x8002, 75},
+        {0x8009, 75},
+        {0x8017, 75},
+        {0xc028, 75},
+        {0x8002, 76},
+        {0x8009, 76},
+        {0x8017, 76},
+        {0xc028, 76},
+    },
+    /* 47 */
+    {
+        {0x8003, 73},
+        {0x8006, 73},
+        {0x800a, 73},
+        {0x800f, 73},
+        {0x8018, 73},
+        {0x801f, 73},
+        {0x8029, 73},
+        {0xc038, 73},
+        {0x8003, 74},
+        {0x8006, 74},
+        {0x800a, 74},
+        {0x800f, 74},
+        {0x8018, 74},
+        {0x801f, 74},
+        {0x8029, 74},
+        {0xc038, 74},
+    },
+    /* 48 */
+    {
+        {0x8003, 75},
+        {0x8006, 75},
+        {0x800a, 75},
+        {0x800f, 75},
+        {0x8018, 75},
+        {0x801f, 75},
+        {0x8029, 75},
+        {0xc038, 75},
+        {0x8003, 76},
+        {0x8006, 76},
+        {0x800a, 76},
+        {0x800f, 76},
+        {0x8018, 76},
+        {0x801f, 76},
+        {0x8029, 76},
+        {0xc038, 76},
+    },
+    /* 49 */
+    {
+        {0x8001, 77},
+        {0xc016, 77},
+        {0x8001, 78},
+        {0xc016, 78},
+        {0x8001, 79},
+        {0xc016, 79},
+        {0x8001, 80},
+        {0xc016, 80},
+        {0x8001, 81},
+        {0xc016, 81},
+        {0x8001, 82},
+        {0xc016, 82},
+        {0x8001, 83},
+        {0xc016, 83},
+        {0x8001, 84},
+        {0xc016, 84},
+    },
+    /* 50 */
+    {
+        {0x8002, 77},
+        {0x8009, 77},
+        {0x8017, 77},
+        {0xc028, 77},
+        {0x8002, 78},
+        {0x8009, 78},
+        {0x8017, 78},
+        {0xc028, 78},
+        {0x8002, 79},
+        {0x8009, 79},
+        {0x8017, 79},
+        {0xc028, 79},
+        {0x8002, 80},
+        {0x8009, 80},
+        {0x8017, 80},
+        {0xc028, 80},
+    },
+    /* 51 */
+    {
+        {0x8003, 77},
+        {0x8006, 77},
+        {0x800a, 77},
+        {0x800f, 77},
+        {0x8018, 77},
+        {0x801f, 77},
+        {0x8029, 77},
+        {0xc038, 77},
+        {0x8003, 78},
+        {0x8006, 78},
+        {0x800a, 78},
+        {0x800f, 78},
+        {0x8018, 78},
+        {0x801f, 78},
+        {0x8029, 78},
+        {0xc038, 78},
+    },
+    /* 52 */
+    {
+        {0x8003, 79},
+        {0x8006, 79},
+        {0x800a, 79},
+        {0x800f, 79},
+        {0x8018, 79},
+        {0x801f, 79},
+        {0x8029, 79},
+        {0xc038, 79},
+        {0x8003, 80},
+        {0x8006, 80},
+        {0x800a, 80},
+        {0x800f, 80},
+        {0x8018, 80},
+        {0x801f, 80},
+        {0x8029, 80},
+        {0xc038, 80},
+    },
+    /* 53 */
+    {
+        {0x8002, 81},
+        {0x8009, 81},
+        {0x8017, 81},
+        {0xc028, 81},
+        {0x8002, 82},
+        {0x8009, 82},
+        {0x8017, 82},
+        {0xc028, 82},
+        {0x8002, 83},
+        {0x8009, 83},
+        {0x8017, 83},
+        {0xc028, 83},
+        {0x8002, 84},
+        {0x8009, 84},
+        {0x8017, 84},
+        {0xc028, 84},
+    },
+    /* 54 */
+    {
+        {0x8003, 81},
+        {0x8006, 81},
+        {0x800a, 81},
+        {0x800f, 81},
+        {0x8018, 81},
+        {0x801f, 81},
+        {0x8029, 81},
+        {0xc038, 81},
+        {0x8003, 82},
+        {0x8006, 82},
+        {0x800a, 82},
+        {0x800f, 82},
+        {0x8018, 82},
+        {0x801f, 82},
+        {0x8029, 82},
+        {0xc038, 82},
+    },
+    /* 55 */
+    {
+        {0x8003, 83},
+        {0x8006, 83},
+        {0x800a, 83},
+        {0x800f, 83},
+        {0x8018, 83},
+        {0x801f, 83},
+        {0x8029, 83},
+        {0xc038, 83},
+        {0x8003, 84},
+        {0x8006, 84},
+        {0x800a, 84},
+        {0x800f, 84},
+        {0x8018, 84},
+        {0x801f, 84},
+        {0x8029, 84},
+        {0xc038, 84},
+    },
+    /* 56 */
+    {
+        {0xc000, 85},
+        {0xc000, 86},
+        {0xc000, 87},
+        {0xc000, 89},
+        {0xc000, 106},
+        {0xc000, 107},
+        {0xc000, 113},
+        {0xc000, 118},
+        {0xc000, 119},
+        {0xc000, 120},
+        {0xc000, 121},
+        {0xc000, 122},
+        {0x46, 0},
+        {0x47, 0},
+        {0x49, 0},
+        {0x404a, 0},
+    },
+    /* 57 */
+    {
+        {0x8001, 85},
+        {0xc016, 85},
+        {0x8001, 86},
+        {0xc016, 86},
+        {0x8001, 87},
+        {0xc016, 87},
+        {0x8001, 89},
+        {0xc016, 89},
+        {0x8001, 106},
+        {0xc016, 106},
+        {0x8001, 107},
+        {0xc016, 107},
+        {0x8001, 113},
+        {0xc016, 113},
+        {0x8001, 118},
+        {0xc016, 118},
+    },
+    /* 58 */
+    {
+        {0x8002, 85},
+        {0x8009, 85},
+        {0x8017, 85},
+        {0xc028, 85},
+        {0x8002, 86},
+        {0x8009, 86},
+        {0x8017, 86},
+        {0xc028, 86},
+        {0x8002, 87},
+        {0x8009, 87},
+        {0x8017, 87},
+        {0xc028, 87},
+        {0x8002, 89},
+        {0x8009, 89},
+        {0x8017, 89},
+        {0xc028, 89},
+    },
+    /* 59 */
+    {
+        {0x8003, 85},
+        {0x8006, 85},
+        {0x800a, 85},
+        {0x800f, 85},
+        {0x8018, 85},
+        {0x801f, 85},
+        {0x8029, 85},
+        {0xc038, 85},
+        {0x8003, 86},
+        {0x8006, 86},
+        {0x800a, 86},
+        {0x800f, 86},
+        {0x8018, 86},
+        {0x801f, 86},
+        {0x8029, 86},
+        {0xc038, 86},
+    },
+    /* 60 */
+    {
+        {0x8003, 87},
+        {0x8006, 87},
+        {0x800a, 87},
+        {0x800f, 87},
+        {0x8018, 87},
+        {0x801f, 87},
+        {0x8029, 87},
+        {0xc038, 87},
+        {0x8003, 89},
+        {0x8006, 89},
+        {0x800a, 89},
+        {0x800f, 89},
+        {0x8018, 89},
+        {0x801f, 89},
+        {0x8029, 89},
+        {0xc038, 89},
+    },
+    /* 61 */
+    {
+        {0x8002, 106},
+        {0x8009, 106},
+        {0x8017, 106},
+        {0xc028, 106},
+        {0x8002, 107},
+        {0x8009, 107},
+        {0x8017, 107},
+        {0xc028, 107},
+        {0x8002, 113},
+        {0x8009, 113},
+        {0x8017, 113},
+        {0xc028, 113},
+        {0x8002, 118},
+        {0x8009, 118},
+        {0x8017, 118},
+        {0xc028, 118},
+    },
+    /* 62 */
+    {
+        {0x8003, 106},
+        {0x8006, 106},
+        {0x800a, 106},
+        {0x800f, 106},
+        {0x8018, 106},
+        {0x801f, 106},
+        {0x8029, 106},
+        {0xc038, 106},
+        {0x8003, 107},
+        {0x8006, 107},
+        {0x800a, 107},
+        {0x800f, 107},
+        {0x8018, 107},
+        {0x801f, 107},
+        {0x8029, 107},
+        {0xc038, 107},
+    },
+    /* 63 */
+    {
+        {0x8003, 113},
+        {0x8006, 113},
+        {0x800a, 113},
+        {0x800f, 113},
+        {0x8018, 113},
+        {0x801f, 113},
+        {0x8029, 113},
+        {0xc038, 113},
+        {0x8003, 118},
+        {0x8006, 118},
+        {0x800a, 118},
+        {0x800f, 118},
+        {0x8018, 118},
+        {0x801f, 118},
+        {0x8029, 118},
+        {0xc038, 118},
+    },
+    /* 64 */
+    {
+        {0x8001, 119},
+        {0xc016, 119},
+        {0x8001, 120},
+        {0xc016, 120},
+        {0x8001, 121},
+        {0xc016, 121},
+        {0x8001, 122},
+        {0xc016, 122},
+        {0xc000, 38},
+        {0xc000, 42},
+        {0xc000, 44},
+        {0xc000, 59},
+        {0xc000, 88},
+        {0xc000, 90},
+        {0x4b, 0},
+        {0x4e, 0},
+    },
+    /* 65 */
+    {
+        {0x8002, 119},
+        {0x8009, 119},
+        {0x8017, 119},
+        {0xc028, 119},
+        {0x8002, 120},
+        {0x8009, 120},
+        {0x8017, 120},
+        {0xc028, 120},
+        {0x8002, 121},
+        {0x8009, 121},
+        {0x8017, 121},
+        {0xc028, 121},
+        {0x8002, 122},
+        {0x8009, 122},
+        {0x8017, 122},
+        {0xc028, 122},
+    },
+    /* 66 */
+    {
+        {0x8003, 119},
+        {0x8006, 119},
+        {0x800a, 119},
+        {0x800f, 119},
+        {0x8018, 119},
+        {0x801f, 119},
+        {0x8029, 119},
+        {0xc038, 119},
+        {0x8003, 120},
+        {0x8006, 120},
+        {0x800a, 120},
+        {0x800f, 120},
+        {0x8018, 120},
+        {0x801f, 120},
+        {0x8029, 120},
+        {0xc038, 120},
+    },
+    /* 67 */
+    {
+        {0x8003, 121},
+        {0x8006, 121},
+        {0x800a, 121},
+        {0x800f, 121},
+        {0x8018, 121},
+        {0x801f, 121},
+        {0x8029, 121},
+        {0xc038, 121},
+        {0x8003, 122},
+        {0x8006, 122},
+        {0x800a, 122},
+        {0x800f, 122},
+        {0x8018, 122},
+        {0x801f, 122},
+        {0x8029, 122},
+        {0xc038, 122},
+    },
+    /* 68 */
+    {
+        {0x8001, 38},
+        {0xc016, 38},
+        {0x8001, 42},
+        {0xc016, 42},
+        {0x8001, 44},
+        {0xc016, 44},
+        {0x8001, 59},
+        {0xc016, 59},
+        {0x8001, 88},
+        {0xc016, 88},
+        {0x8001, 90},
+        {0xc016, 90},
+        {0x4c, 0},
+        {0x4d, 0},
+        {0x4f, 0},
+        {0x51, 0},
+    },
+    /* 69 */
+    {
+        {0x8002, 38},
+        {0x8009, 38},
+        {0x8017, 38},
+        {0xc028, 38},
+        {0x8002, 42},
+        {0x8009, 42},
+        {0x8017, 42},
+        {0xc028, 42},
+        {0x8002, 44},
+        {0x8009, 44},
+        {0x8017, 44},
+        {0xc028, 44},
+        {0x8002, 59},
+        {0x8009, 59},
+        {0x8017, 59},
+        {0xc028, 59},
+    },
+    /* 70 */
+    {
+        {0x8003, 38},
+        {0x8006, 38},
+        {0x800a, 38},
+        {0x800f, 38},
+        {0x8018, 38},
+        {0x801f, 38},
+        {0x8029, 38},
+        {0xc038, 38},
+        {0x8003, 42},
+        {0x8006, 42},
+        {0x800a, 42},
+        {0x800f, 42},
+        {0x8018, 42},
+        {0x801f, 42},
+        {0x8029, 42},
+        {0xc038, 42},
+    },
+    /* 71 */
+    {
+        {0x8003, 44},
+        {0x8006, 44},
+        {0x800a, 44},
+        {0x800f, 44},
+        {0x8018, 44},
+        {0x801f, 44},
+        {0x8029, 44},
+        {0xc038, 44},
+        {0x8003, 59},
+        {0x8006, 59},
+        {0x800a, 59},
+        {0x800f, 59},
+        {0x8018, 59},
+        {0x801f, 59},
+        {0x8029, 59},
+        {0xc038, 59},
+    },
+    /* 72 */
+    {
+        {0x8002, 88},
+        {0x8009, 88},
+        {0x8017, 88},
+        {0xc028, 88},
+        {0x8002, 90},
+        {0x8009, 90},
+        {0x8017, 90},
+        {0xc028, 90},
+        {0xc000, 33},
+        {0xc000, 34},
+        {0xc000, 40},
+        {0xc000, 41},
+        {0xc000, 63},
+        {0x50, 0},
+        {0x52, 0},
+        {0x54, 0},
+    },
+    /* 73 */
+    {
+        {0x8003, 88},
+        {0x8006, 88},
+        {0x800a, 88},
+        {0x800f, 88},
+        {0x8018, 88},
+        {0x801f, 88},
+        {0x8029, 88},
+        {0xc038, 88},
+        {0x8003, 90},
+        {0x8006, 90},
+        {0x800a, 90},
+        {0x800f, 90},
+        {0x8018, 90},
+        {0x801f, 90},
+        {0x8029, 90},
+        {0xc038, 90},
+    },
+    /* 74 */
+    {
+        {0x8001, 33},
+        {0xc016, 33},
+        {0x8001, 34},
+        {0xc016, 34},
+        {0x8001, 40},
+        {0xc016, 40},
+        {0x8001, 41},
+        {0xc016, 41},
+        {0x8001, 63},
+        {0xc016, 63},
+        {0xc000, 39},
+        {0xc000, 43},
+        {0xc000, 124},
+        {0x53, 0},
+        {0x55, 0},
+        {0x58, 0},
+    },
+    /* 75 */
+    {
+        {0x8002, 33},
+        {0x8009, 33},
+        {0x8017, 33},
+        {0xc028, 33},
+        {0x8002, 34},
+        {0x8009, 34},
+        {0x8017, 34},
+        {0xc028, 34},
+        {0x8002, 40},
+        {0x8009, 40},
+        {0x8017, 40},
+        {0xc028, 40},
+        {0x8002, 41},
+        {0x8009, 41},
+        {0x8017, 41},
+        {0xc028, 41},
+    },
+    /* 76 */
+    {
+        {0x8003, 33},
+        {0x8006, 33},
+        {0x800a, 33},
+        {0x800f, 33},
+        {0x8018, 33},
+        {0x801f, 33},
+        {0x8029, 33},
+        {0xc038, 33},
+        {0x8003, 34},
+        {0x8006, 34},
+        {0x800a, 34},
+        {0x800f, 34},
+        {0x8018, 34},
+        {0x801f, 34},
+        {0x8029, 34},
+        {0xc038, 34},
+    },
+    /* 77 */
+    {
+        {0x8003, 40},
+        {0x8006, 40},
+        {0x800a, 40},
+        {0x800f, 40},
+        {0x8018, 40},
+        {0x801f, 40},
+        {0x8029, 40},
+        {0xc038, 40},
+        {0x8003, 41},
+        {0x8006, 41},
+        {0x800a, 41},
+        {0x800f, 41},
+        {0x8018, 41},
+        {0x801f, 41},
+        {0x8029, 41},
+        {0xc038, 41},
+    },
+    /* 78 */
+    {
+        {0x8002, 63},
+        {0x8009, 63},
+        {0x8017, 63},
+        {0xc028, 63},
+        {0x8001, 39},
+        {0xc016, 39},
+        {0x8001, 43},
+        {0xc016, 43},
+        {0x8001, 124},
+        {0xc016, 124},
+        {0xc000, 35},
+        {0xc000, 62},
+        {0x56, 0},
+        {0x57, 0},
+        {0x59, 0},
+        {0x5a, 0},
+    },
+    /* 79 */
+    {
+        {0x8003, 63},
+        {0x8006, 63},
+        {0x800a, 63},
+        {0x800f, 63},
+        {0x8018, 63},
+        {0x801f, 63},
+        {0x8029, 63},
+        {0xc038, 63},
+        {0x8002, 39},
+        {0x8009, 39},
+        {0x8017, 39},
+        {0xc028, 39},
+        {0x8002, 43},
+        {0x8009, 43},
+        {0x8017, 43},
+        {0xc028, 43},
+    },
+    /* 80 */
+    {
+        {0x8003, 39},
+        {0x8006, 39},
+        {0x800a, 39},
+        {0x800f, 39},
+        {0x8018, 39},
+        {0x801f, 39},
+        {0x8029, 39},
+        {0xc038, 39},
+        {0x8003, 43},
+        {0x8006, 43},
+        {0x800a, 43},
+        {0x800f, 43},
+        {0x8018, 43},
+        {0x801f, 43},
+        {0x8029, 43},
+        {0xc038, 43},
+    },
+    /* 81 */
+    {
+        {0x8002, 124},
+        {0x8009, 124},
+        {0x8017, 124},
+        {0xc028, 124},
+        {0x8001, 35},
+        {0xc016, 35},
+        {0x8001, 62},
+        {0xc016, 62},
+        {0xc000, 0},
+        {0xc000, 36},
+        {0xc000, 64},
+        {0xc000, 91},
+        {0xc000, 93},
+        {0xc000, 126},
+        {0x5b, 0},
+        {0x5c, 0},
+    },
+    /* 82 */
+    {
+        {0x8003, 124},
+        {0x8006, 124},
+        {0x800a, 124},
+        {0x800f, 124},
+        {0x8018, 124},
+        {0x801f, 124},
+        {0x8029, 124},
+        {0xc038, 124},
+        {0x8002, 35},
+        {0x8009, 35},
+        {0x8017, 35},
+        {0xc028, 35},
+        {0x8002, 62},
+        {0x8009, 62},
+        {0x8017, 62},
+        {0xc028, 62},
+    },
+    /* 83 */
+    {
+        {0x8003, 35},
+        {0x8006, 35},
+        {0x800a, 35},
+        {0x800f, 35},
+        {0x8018, 35},
+        {0x801f, 35},
+        {0x8029, 35},
+        {0xc038, 35},
+        {0x8003, 62},
+        {0x8006, 62},
+        {0x800a, 62},
+        {0x800f, 62},
+        {0x8018, 62},
+        {0x801f, 62},
+        {0x8029, 62},
+        {0xc038, 62},
+    },
+    /* 84 */
+    {
+        {0x8001, 0},
+        {0xc016, 0},
+        {0x8001, 36},
+        {0xc016, 36},
+        {0x8001, 64},
+        {0xc016, 64},
+        {0x8001, 91},
+        {0xc016, 91},
+        {0x8001, 93},
+        {0xc016, 93},
+        {0x8001, 126},
+        {0xc016, 126},
+        {0xc000, 94},
+        {0xc000, 125},
+        {0x5d, 0},
+        {0x5e, 0},
+    },
+    /* 85 */
+    {
+        {0x8002, 0},
+        {0x8009, 0},
+        {0x8017, 0},
+        {0xc028, 0},
+        {0x8002, 36},
+        {0x8009, 36},
+        {0x8017, 36},
+        {0xc028, 36},
+        {0x8002, 64},
+        {0x8009, 64},
+        {0x8017, 64},
+        {0xc028, 64},
+        {0x8002, 91},
+        {0x8009, 91},
+        {0x8017, 91},
+        {0xc028, 91},
+    },
+    /* 86 */
+    {
+        {0x8003, 0},
+        {0x8006, 0},
+        {0x800a, 0},
+        {0x800f, 0},
+        {0x8018, 0},
+        {0x801f, 0},
+        {0x8029, 0},
+        {0xc038, 0},
+        {0x8003, 36},
+        {0x8006, 36},
+        {0x800a, 36},
+        {0x800f, 36},
+        {0x8018, 36},
+        {0x801f, 36},
+        {0x8029, 36},
+        {0xc038, 36},
+    },
+    /* 87 */
+    {
+        {0x8003, 64},
+        {0x8006, 64},
+        {0x800a, 64},
+        {0x800f, 64},
+        {0x8018, 64},
+        {0x801f, 64},
+        {0x8029, 64},
+        {0xc038, 64},
+        {0x8003, 91},
+        {0x8006, 91},
+        {0x800a, 91},
+        {0x800f, 91},
+        {0x8018, 91},
+        {0x801f, 91},
+        {0x8029, 91},
+        {0xc038, 91},
+    },
+    /* 88 */
+    {
+        {0x8002, 93},
+        {0x8009, 93},
+        {0x8017, 93},
+        {0xc028, 93},
+        {0x8002, 126},
+        {0x8009, 126},
+        {0x8017, 126},
+        {0xc028, 126},
+        {0x8001, 94},
+        {0xc016, 94},
+        {0x8001, 125},
+        {0xc016, 125},
+        {0xc000, 60},
+        {0xc000, 96},
+        {0xc000, 123},
+        {0x5f, 0},
+    },
+    /* 89 */
+    {
+        {0x8003, 93},
+        {0x8006, 93},
+        {0x800a, 93},
+        {0x800f, 93},
+        {0x8018, 93},
+        {0x801f, 93},
+        {0x8029, 93},
+        {0xc038, 93},
+        {0x8003, 126},
+        {0x8006, 126},
+        {0x800a, 126},
+        {0x800f, 126},
+        {0x8018, 126},
+        {0x801f, 126},
+        {0x8029, 126},
+        {0xc038, 126},
+    },
+    /* 90 */
+    {
+        {0x8002, 94},
+        {0x8009, 94},
+        {0x8017, 94},
+        {0xc028, 94},
+        {0x8002, 125},
+        {0x8009, 125},
+        {0x8017, 125},
+        {0xc028, 125},
+        {0x8001, 60},
+        {0xc016, 60},
+        {0x8001, 96},
+        {0xc016, 96},
+        {0x8001, 123},
+        {0xc016, 123},
+        {0x60, 0},
+        {0x6e, 0},
+    },
+    /* 91 */
+    {
+        {0x8003, 94},
+        {0x8006, 94},
+        {0x800a, 94},
+        {0x800f, 94},
+        {0x8018, 94},
+        {0x801f, 94},
+        {0x8029, 94},
+        {0xc038, 94},
+        {0x8003, 125},
+        {0x8006, 125},
+        {0x800a, 125},
+        {0x800f, 125},
+        {0x8018, 125},
+        {0x801f, 125},
+        {0x8029, 125},
+        {0xc038, 125},
+    },
+    /* 92 */
+    {
+        {0x8002, 60},
+        {0x8009, 60},
+        {0x8017, 60},
+        {0xc028, 60},
+        {0x8002, 96},
+        {0x8009, 96},
+        {0x8017, 96},
+        {0xc028, 96},
+        {0x8002, 123},
+        {0x8009, 123},
+        {0x8017, 123},
+        {0xc028, 123},
+        {0x61, 0},
+        {0x65, 0},
+        {0x6f, 0},
+        {0x85, 0},
+    },
+    /* 93 */
+    {
+        {0x8003, 60},
+        {0x8006, 60},
+        {0x800a, 60},
+        {0x800f, 60},
+        {0x8018, 60},
+        {0x801f, 60},
+        {0x8029, 60},
+        {0xc038, 60},
+        {0x8003, 96},
+        {0x8006, 96},
+        {0x800a, 96},
+        {0x800f, 96},
+        {0x8018, 96},
+        {0x801f, 96},
+        {0x8029, 96},
+        {0xc038, 96},
+    },
+    /* 94 */
+    {
+        {0x8003, 123},
+        {0x8006, 123},
+        {0x800a, 123},
+        {0x800f, 123},
+        {0x8018, 123},
+        {0x801f, 123},
+        {0x8029, 123},
+        {0xc038, 123},
+        {0x62, 0},
+        {0x63, 0},
+        {0x66, 0},
+        {0x69, 0},
+        {0x70, 0},
+        {0x77, 0},
+        {0x86, 0},
+        {0x99, 0},
+    },
+    /* 95 */
+    {
+        {0xc000, 92},
+        {0xc000, 195},
+        {0xc000, 208},
+        {0x64, 0},
+        {0x67, 0},
+        {0x68, 0},
+        {0x6a, 0},
+        {0x6b, 0},
+        {0x71, 0},
+        {0x74, 0},
+        {0x78, 0},
+        {0x7e, 0},
+        {0x87, 0},
+        {0x8e, 0},
+        {0x9a, 0},
+        {0xa9, 0},
+    },
+    /* 96 */
+    {
+        {0x8001, 92},
+        {0xc016, 92},
+        {0x8001, 195},
+        {0xc016, 195},
+        {0x8001, 208},
+        {0xc016, 208},
+        {0xc000, 128},
+        {0xc000, 130},
+        {0xc000, 131},
+        {0xc000, 162},
+        {0xc000, 184},
+        {0xc000, 194},
+        {0xc000, 224},
+        {0xc000, 226},
+        {0x6c, 0},
+        {0x6d, 0},
+    },
+    /* 97 */
+    {
+        {0x8002, 92},
+        {0x8009, 92},
+        {0x8017, 92},
+        {0xc028, 92},
+        {0x8002, 195},
+        {0x8009, 195},
+        {0x8017, 195},
+        {0xc028, 195},
+        {0x8002, 208},
+        {0x8009, 208},
+        {0x8017, 208},
+        {0xc028, 208},
+        {0x8001, 128},
+        {0xc016, 128},
+        {0x8001, 130},
+        {0xc016, 130},
+    },
+    /* 98 */
+    {
+        {0x8003, 92},
+        {0x8006, 92},
+        {0x800a, 92},
+        {0x800f, 92},
+        {0x8018, 92},
+        {0x801f, 92},
+        {0x8029, 92},
+        {0xc038, 92},
+        {0x8003, 195},
+        {0x8006, 195},
+        {0x800a, 195},
+        {0x800f, 195},
+        {0x8018, 195},
+        {0x801f, 195},
+        {0x8029, 195},
+        {0xc038, 195},
+    },
+    /* 99 */
+    {
+        {0x8003, 208},
+        {0x8006, 208},
+        {0x800a, 208},
+        {0x800f, 208},
+        {0x8018, 208},
+        {0x801f, 208},
+        {0x8029, 208},
+        {0xc038, 208},
+        {0x8002, 128},
+        {0x8009, 128},
+        {0x8017, 128},
+        {0xc028, 128},
+        {0x8002, 130},
+        {0x8009, 130},
+        {0x8017, 130},
+        {0xc028, 130},
+    },
+    /* 100 */
+    {
+        {0x8003, 128},
+        {0x8006, 128},
+        {0x800a, 128},
+        {0x800f, 128},
+        {0x8018, 128},
+        {0x801f, 128},
+        {0x8029, 128},
+        {0xc038, 128},
+        {0x8003, 130},
+        {0x8006, 130},
+        {0x800a, 130},
+        {0x800f, 130},
+        {0x8018, 130},
+        {0x801f, 130},
+        {0x8029, 130},
+        {0xc038, 130},
+    },
+    /* 101 */
+    {
+        {0x8001, 131},
+        {0xc016, 131},
+        {0x8001, 162},
+        {0xc016, 162},
+        {0x8001, 184},
+        {0xc016, 184},
+        {0x8001, 194},
+        {0xc016, 194},
+        {0x8001, 224},
+        {0xc016, 224},
+        {0x8001, 226},
+        {0xc016, 226},
+        {0xc000, 153},
+        {0xc000, 161},
+        {0xc000, 167},
+        {0xc000, 172},
+    },
+    /* 102 */
+    {
+        {0x8002, 131},
+        {0x8009, 131},
+        {0x8017, 131},
+        {0xc028, 131},
+        {0x8002, 162},
+        {0x8009, 162},
+        {0x8017, 162},
+        {0xc028, 162},
+        {0x8002, 184},
+        {0x8009, 184},
+        {0x8017, 184},
+        {0xc028, 184},
+        {0x8002, 194},
+        {0x8009, 194},
+        {0x8017, 194},
+        {0xc028, 194},
+    },
+    /* 103 */
+    {
+        {0x8003, 131},
+        {0x8006, 131},
+        {0x800a, 131},
+        {0x800f, 131},
+        {0x8018, 131},
+        {0x801f, 131},
+        {0x8029, 131},
+        {0xc038, 131},
+        {0x8003, 162},
+        {0x8006, 162},
+        {0x800a, 162},
+        {0x800f, 162},
+        {0x8018, 162},
+        {0x801f, 162},
+        {0x8029, 162},
+        {0xc038, 162},
+    },
+    /* 104 */
+    {
+        {0x8003, 184},
+        {0x8006, 184},
+        {0x800a, 184},
+        {0x800f, 184},
+        {0x8018, 184},
+        {0x801f, 184},
+        {0x8029, 184},
+        {0xc038, 184},
+        {0x8003, 194},
+        {0x8006, 194},
+        {0x800a, 194},
+        {0x800f, 194},
+        {0x8018, 194},
+        {0x801f, 194},
+        {0x8029, 194},
+        {0xc038, 194},
+    },
+    /* 105 */
+    {
+        {0x8002, 224},
+        {0x8009, 224},
+        {0x8017, 224},
+        {0xc028, 224},
+        {0x8002, 226},
+        {0x8009, 226},
+        {0x8017, 226},
+        {0xc028, 226},
+        {0x8001, 153},
+        {0xc016, 153},
+        {0x8001, 161},
+        {0xc016, 161},
+        {0x8001, 167},
+        {0xc016, 167},
+        {0x8001, 172},
+        {0xc016, 172},
+    },
+    /* 106 */
+    {
+        {0x8003, 224},
+        {0x8006, 224},
+        {0x800a, 224},
+        {0x800f, 224},
+        {0x8018, 224},
+        {0x801f, 224},
+        {0x8029, 224},
+        {0xc038, 224},
+        {0x8003, 226},
+        {0x8006, 226},
+        {0x800a, 226},
+        {0x800f, 226},
+        {0x8018, 226},
+        {0x801f, 226},
+        {0x8029, 226},
+        {0xc038, 226},
+    },
+    /* 107 */
+    {
+        {0x8002, 153},
+        {0x8009, 153},
+        {0x8017, 153},
+        {0xc028, 153},
+        {0x8002, 161},
+        {0x8009, 161},
+        {0x8017, 161},
+        {0xc028, 161},
+        {0x8002, 167},
+        {0x8009, 167},
+        {0x8017, 167},
+        {0xc028, 167},
+        {0x8002, 172},
+        {0x8009, 172},
+        {0x8017, 172},
+        {0xc028, 172},
+    },
+    /* 108 */
+    {
+        {0x8003, 153},
+        {0x8006, 153},
+        {0x800a, 153},
+        {0x800f, 153},
+        {0x8018, 153},
+        {0x801f, 153},
+        {0x8029, 153},
+        {0xc038, 153},
+        {0x8003, 161},
+        {0x8006, 161},
+        {0x800a, 161},
+        {0x800f, 161},
+        {0x8018, 161},
+        {0x801f, 161},
+        {0x8029, 161},
+        {0xc038, 161},
+    },
+    /* 109 */
+    {
+        {0x8003, 167},
+        {0x8006, 167},
+        {0x800a, 167},
+        {0x800f, 167},
+        {0x8018, 167},
+        {0x801f, 167},
+        {0x8029, 167},
+        {0xc038, 167},
+        {0x8003, 172},
+        {0x8006, 172},
+        {0x800a, 172},
+        {0x800f, 172},
+        {0x8018, 172},
+        {0x801f, 172},
+        {0x8029, 172},
+        {0xc038, 172},
+    },
+    /* 110 */
+    {
+        {0x72, 0},
+        {0x73, 0},
+        {0x75, 0},
+        {0x76, 0},
+        {0x79, 0},
+        {0x7b, 0},
+        {0x7f, 0},
+        {0x82, 0},
+        {0x88, 0},
+        {0x8b, 0},
+        {0x8f, 0},
+        {0x92, 0},
+        {0x9b, 0},
+        {0xa2, 0},
+        {0xaa, 0},
+        {0xb4, 0},
+    },
+    /* 111 */
+    {
+        {0xc000, 176},
+        {0xc000, 177},
+        {0xc000, 179},
+        {0xc000, 209},
+        {0xc000, 216},
+        {0xc000, 217},
+        {0xc000, 227},
+        {0xc000, 229},
+        {0xc000, 230},
+        {0x7a, 0},
+        {0x7c, 0},
+        {0x7d, 0},
+        {0x80, 0},
+        {0x81, 0},
+        {0x83, 0},
+        {0x84, 0},
+    },
+    /* 112 */
+    {
+        {0x8001, 176},
+        {0xc016, 176},
+        {0x8001, 177},
+        {0xc016, 177},
+        {0x8001, 179},
+        {0xc016, 179},
+        {0x8001, 209},
+        {0xc016, 209},
+        {0x8001, 216},
+        {0xc016, 216},
+        {0x8001, 217},
+        {0xc016, 217},
+        {0x8001, 227},
+        {0xc016, 227},
+        {0x8001, 229},
+        {0xc016, 229},
+    },
+    /* 113 */
+    {
+        {0x8002, 176},
+        {0x8009, 176},
+        {0x8017, 176},
+        {0xc028, 176},
+        {0x8002, 177},
+        {0x8009, 177},
+        {0x8017, 177},
+        {0xc028, 177},
+        {0x8002, 179},
+        {0x8009, 179},
+        {0x8017, 179},
+        {0xc028, 179},
+        {0x8002, 209},
+        {0x8009, 209},
+        {0x8017, 209},
+        {0xc028, 209},
+    },
+    /* 114 */
+    {
+        {0x8003, 176},
+        {0x8006, 176},
+        {0x800a, 176},
+        {0x800f, 176},
+        {0x8018, 176},
+        {0x801f, 176},
+        {0x8029, 176},
+        {0xc038, 176},
+        {0x8003, 177},
+        {0x8006, 177},
+        {0x800a, 177},
+        {0x800f, 177},
+        {0x8018, 177},
+        {0x801f, 177},
+        {0x8029, 177},
+        {0xc038, 177},
+    },
+    /* 115 */
+    {
+        {0x8003, 179},
+        {0x8006, 179},
+        {0x800a, 179},
+        {0x800f, 179},
+        {0x8018, 179},
+        {0x801f, 179},
+        {0x8029, 179},
+        {0xc038, 179},
+        {0x8003, 209},
+        {0x8006, 209},
+        {0x800a, 209},
+        {0x800f, 209},
+        {0x8018, 209},
+        {0x801f, 209},
+        {0x8029, 209},
+        {0xc038, 209},
+    },
+    /* 116 */
+    {
+        {0x8002, 216},
+        {0x8009, 216},
+        {0x8017, 216},
+        {0xc028, 216},
+        {0x8002, 217},
+        {0x8009, 217},
+        {0x8017, 217},
+        {0xc028, 217},
+        {0x8002, 227},
+        {0x8009, 227},
+        {0x8017, 227},
+        {0xc028, 227},
+        {0x8002, 229},
+        {0x8009, 229},
+        {0x8017, 229},
+        {0xc028, 229},
+    },
+    /* 117 */
+    {
+        {0x8003, 216},
+        {0x8006, 216},
+        {0x800a, 216},
+        {0x800f, 216},
+        {0x8018, 216},
+        {0x801f, 216},
+        {0x8029, 216},
+        {0xc038, 216},
+        {0x8003, 217},
+        {0x8006, 217},
+        {0x800a, 217},
+        {0x800f, 217},
+        {0x8018, 217},
+        {0x801f, 217},
+        {0x8029, 217},
+        {0xc038, 217},
+    },
+    /* 118 */
+    {
+        {0x8003, 227},
+        {0x8006, 227},
+        {0x800a, 227},
+        {0x800f, 227},
+        {0x8018, 227},
+        {0x801f, 227},
+        {0x8029, 227},
+        {0xc038, 227},
+        {0x8003, 229},
+        {0x8006, 229},
+        {0x800a, 229},
+        {0x800f, 229},
+        {0x8018, 229},
+        {0x801f, 229},
+        {0x8029, 229},
+        {0xc038, 229},
+    },
+    /* 119 */
+    {
+        {0x8001, 230},
+        {0xc016, 230},
+        {0xc000, 129},
+        {0xc000, 132},
+        {0xc000, 133},
+        {0xc000, 134},
+        {0xc000, 136},
+        {0xc000, 146},
+        {0xc000, 154},
+        {0xc000, 156},
+        {0xc000, 160},
+        {0xc000, 163},
+        {0xc000, 164},
+        {0xc000, 169},
+        {0xc000, 170},
+        {0xc000, 173},
+    },
+    /* 120 */
+    {
+        {0x8002, 230},
+        {0x8009, 230},
+        {0x8017, 230},
+        {0xc028, 230},
+        {0x8001, 129},
+        {0xc016, 129},
+        {0x8001, 132},
+        {0xc016, 132},
+        {0x8001, 133},
+        {0xc016, 133},
+        {0x8001, 134},
+        {0xc016, 134},
+        {0x8001, 136},
+        {0xc016, 136},
+        {0x8001, 146},
+        {0xc016, 146},
+    },
+    /* 121 */
+    {
+        {0x8003, 230},
+        {0x8006, 230},
+        {0x800a, 230},
+        {0x800f, 230},
+        {0x8018, 230},
+        {0x801f, 230},
+        {0x8029, 230},
+        {0xc038, 230},
+        {0x8002, 129},
+        {0x8009, 129},
+        {0x8017, 129},
+        {0xc028, 129},
+        {0x8002, 132},
+        {0x8009, 132},
+        {0x8017, 132},
+        {0xc028, 132},
+    },
+    /* 122 */
+    {
+        {0x8003, 129},
+        {0x8006, 129},
+        {0x800a, 129},
+        {0x800f, 129},
+        {0x8018, 129},
+        {0x801f, 129},
+        {0x8029, 129},
+        {0xc038, 129},
+        {0x8003, 132},
+        {0x8006, 132},
+        {0x800a, 132},
+        {0x800f, 132},
+        {0x8018, 132},
+        {0x801f, 132},
+        {0x8029, 132},
+        {0xc038, 132},
+    },
+    /* 123 */
+    {
+        {0x8002, 133},
+        {0x8009, 133},
+        {0x8017, 133},
+        {0xc028, 133},
+        {0x8002, 134},
+        {0x8009, 134},
+        {0x8017, 134},
+        {0xc028, 134},
+        {0x8002, 136},
+        {0x8009, 136},
+        {0x8017, 136},
+        {0xc028, 136},
+        {0x8002, 146},
+        {0x8009, 146},
+        {0x8017, 146},
+        {0xc028, 146},
+    },
+    /* 124 */
+    {
+        {0x8003, 133},
+        {0x8006, 133},
+        {0x800a, 133},
+        {0x800f, 133},
+        {0x8018, 133},
+        {0x801f, 133},
+        {0x8029, 133},
+        {0xc038, 133},
+        {0x8003, 134},
+        {0x8006, 134},
+        {0x800a, 134},
+        {0x800f, 134},
+        {0x8018, 134},
+        {0x801f, 134},
+        {0x8029, 134},
+        {0xc038, 134},
+    },
+    /* 125 */
+    {
+        {0x8003, 136},
+        {0x8006, 136},
+        {0x800a, 136},
+        {0x800f, 136},
+        {0x8018, 136},
+        {0x801f, 136},
+        {0x8029, 136},
+        {0xc038, 136},
+        {0x8003, 146},
+        {0x8006, 146},
+        {0x800a, 146},
+        {0x800f, 146},
+        {0x8018, 146},
+        {0x801f, 146},
+        {0x8029, 146},
+        {0xc038, 146},
+    },
+    /* 126 */
+    {
+        {0x8001, 154},
+        {0xc016, 154},
+        {0x8001, 156},
+        {0xc016, 156},
+        {0x8001, 160},
+        {0xc016, 160},
+        {0x8001, 163},
+        {0xc016, 163},
+        {0x8001, 164},
+        {0xc016, 164},
+        {0x8001, 169},
+        {0xc016, 169},
+        {0x8001, 170},
+        {0xc016, 170},
+        {0x8001, 173},
+        {0xc016, 173},
+    },
+    /* 127 */
+    {
+        {0x8002, 154},
+        {0x8009, 154},
+        {0x8017, 154},
+        {0xc028, 154},
+        {0x8002, 156},
+        {0x8009, 156},
+        {0x8017, 156},
+        {0xc028, 156},
+        {0x8002, 160},
+        {0x8009, 160},
+        {0x8017, 160},
+        {0xc028, 160},
+        {0x8002, 163},
+        {0x8009, 163},
+        {0x8017, 163},
+        {0xc028, 163},
+    },
+    /* 128 */
+    {
+        {0x8003, 154},
+        {0x8006, 154},
+        {0x800a, 154},
+        {0x800f, 154},
+        {0x8018, 154},
+        {0x801f, 154},
+        {0x8029, 154},
+        {0xc038, 154},
+        {0x8003, 156},
+        {0x8006, 156},
+        {0x800a, 156},
+        {0x800f, 156},
+        {0x8018, 156},
+        {0x801f, 156},
+        {0x8029, 156},
+        {0xc038, 156},
+    },
+    /* 129 */
+    {
+        {0x8003, 160},
+        {0x8006, 160},
+        {0x800a, 160},
+        {0x800f, 160},
+        {0x8018, 160},
+        {0x801f, 160},
+        {0x8029, 160},
+        {0xc038, 160},
+        {0x8003, 163},
+        {0x8006, 163},
+        {0x800a, 163},
+        {0x800f, 163},
+        {0x8018, 163},
+        {0x801f, 163},
+        {0x8029, 163},
+        {0xc038, 163},
+    },
+    /* 130 */
+    {
+        {0x8002, 164},
+        {0x8009, 164},
+        {0x8017, 164},
+        {0xc028, 164},
+        {0x8002, 169},
+        {0x8009, 169},
+        {0x8017, 169},
+        {0xc028, 169},
+        {0x8002, 170},
+        {0x8009, 170},
+        {0x8017, 170},
+        {0xc028, 170},
+        {0x8002, 173},
+        {0x8009, 173},
+        {0x8017, 173},
+        {0xc028, 173},
+    },
+    /* 131 */
+    {
+        {0x8003, 164},
+        {0x8006, 164},
+        {0x800a, 164},
+        {0x800f, 164},
+        {0x8018, 164},
+        {0x801f, 164},
+        {0x8029, 164},
+        {0xc038, 164},
+        {0x8003, 169},
+        {0x8006, 169},
+        {0x800a, 169},
+        {0x800f, 169},
+        {0x8018, 169},
+        {0x801f, 169},
+        {0x8029, 169},
+        {0xc038, 169},
+    },
+    /* 132 */
+    {
+        {0x8003, 170},
+        {0x8006, 170},
+        {0x800a, 170},
+        {0x800f, 170},
+        {0x8018, 170},
+        {0x801f, 170},
+        {0x8029, 170},
+        {0xc038, 170},
+        {0x8003, 173},
+        {0x8006, 173},
+        {0x800a, 173},
+        {0x800f, 173},
+        {0x8018, 173},
+        {0x801f, 173},
+        {0x8029, 173},
+        {0xc038, 173},
+    },
+    /* 133 */
+    {
+        {0x89, 0},
+        {0x8a, 0},
+        {0x8c, 0},
+        {0x8d, 0},
+        {0x90, 0},
+        {0x91, 0},
+        {0x93, 0},
+        {0x96, 0},
+        {0x9c, 0},
+        {0x9f, 0},
+        {0xa3, 0},
+        {0xa6, 0},
+        {0xab, 0},
+        {0xae, 0},
+        {0xb5, 0},
+        {0xbe, 0},
+    },
+    /* 134 */
+    {
+        {0xc000, 178},
+        {0xc000, 181},
+        {0xc000, 185},
+        {0xc000, 186},
+        {0xc000, 187},
+        {0xc000, 189},
+        {0xc000, 190},
+        {0xc000, 196},
+        {0xc000, 198},
+        {0xc000, 228},
+        {0xc000, 232},
+        {0xc000, 233},
+        {0x94, 0},
+        {0x95, 0},
+        {0x97, 0},
+        {0x98, 0},
+    },
+    /* 135 */
+    {
+        {0x8001, 178},
+        {0xc016, 178},
+        {0x8001, 181},
+        {0xc016, 181},
+        {0x8001, 185},
+        {0xc016, 185},
+        {0x8001, 186},
+        {0xc016, 186},
+        {0x8001, 187},
+        {0xc016, 187},
+        {0x8001, 189},
+        {0xc016, 189},
+        {0x8001, 190},
+        {0xc016, 190},
+        {0x8001, 196},
+        {0xc016, 196},
+    },
+    /* 136 */
+    {
+        {0x8002, 178},
+        {0x8009, 178},
+        {0x8017, 178},
+        {0xc028, 178},
+        {0x8002, 181},
+        {0x8009, 181},
+        {0x8017, 181},
+        {0xc028, 181},
+        {0x8002, 185},
+        {0x8009, 185},
+        {0x8017, 185},
+        {0xc028, 185},
+        {0x8002, 186},
+        {0x8009, 186},
+        {0x8017, 186},
+        {0xc028, 186},
+    },
+    /* 137 */
+    {
+        {0x8003, 178},
+        {0x8006, 178},
+        {0x800a, 178},
+        {0x800f, 178},
+        {0x8018, 178},
+        {0x801f, 178},
+        {0x8029, 178},
+        {0xc038, 178},
+        {0x8003, 181},
+        {0x8006, 181},
+        {0x800a, 181},
+        {0x800f, 181},
+        {0x8018, 181},
+        {0x801f, 181},
+        {0x8029, 181},
+        {0xc038, 181},
+    },
+    /* 138 */
+    {
+        {0x8003, 185},
+        {0x8006, 185},
+        {0x800a, 185},
+        {0x800f, 185},
+        {0x8018, 185},
+        {0x801f, 185},
+        {0x8029, 185},
+        {0xc038, 185},
+        {0x8003, 186},
+        {0x8006, 186},
+        {0x800a, 186},
+        {0x800f, 186},
+        {0x8018, 186},
+        {0x801f, 186},
+        {0x8029, 186},
+        {0xc038, 186},
+    },
+    /* 139 */
+    {
+        {0x8002, 187},
+        {0x8009, 187},
+        {0x8017, 187},
+        {0xc028, 187},
+        {0x8002, 189},
+        {0x8009, 189},
+        {0x8017, 189},
+        {0xc028, 189},
+        {0x8002, 190},
+        {0x8009, 190},
+        {0x8017, 190},
+        {0xc028, 190},
+        {0x8002, 196},
+        {0x8009, 196},
+        {0x8017, 196},
+        {0xc028, 196},
+    },
+    /* 140 */
+    {
+        {0x8003, 187},
+        {0x8006, 187},
+        {0x800a, 187},
+        {0x800f, 187},
+        {0x8018, 187},
+        {0x801f, 187},
+        {0x8029, 187},
+        {0xc038, 187},
+        {0x8003, 189},
+        {0x8006, 189},
+        {0x800a, 189},
+        {0x800f, 189},
+        {0x8018, 189},
+        {0x801f, 189},
+        {0x8029, 189},
+        {0xc038, 189},
+    },
+    /* 141 */
+    {
+        {0x8003, 190},
+        {0x8006, 190},
+        {0x800a, 190},
+        {0x800f, 190},
+        {0x8018, 190},
+        {0x801f, 190},
+        {0x8029, 190},
+        {0xc038, 190},
+        {0x8003, 196},
+        {0x8006, 196},
+        {0x800a, 196},
+        {0x800f, 196},
+        {0x8018, 196},
+        {0x801f, 196},
+        {0x8029, 196},
+        {0xc038, 196},
+    },
+    /* 142 */
+    {
+        {0x8001, 198},
+        {0xc016, 198},
+        {0x8001, 228},
+        {0xc016, 228},
+        {0x8001, 232},
+        {0xc016, 232},
+        {0x8001, 233},
+        {0xc016, 233},
+        {0xc000, 1},
+        {0xc000, 135},
+        {0xc000, 137},
+        {0xc000, 138},
+        {0xc000, 139},
+        {0xc000, 140},
+        {0xc000, 141},
+        {0xc000, 143},
+    },
+    /* 143 */
+    {
+        {0x8002, 198},
+        {0x8009, 198},
+        {0x8017, 198},
+        {0xc028, 198},
+        {0x8002, 228},
+        {0x8009, 228},
+        {0x8017, 228},
+        {0xc028, 228},
+        {0x8002, 232},
+        {0x8009, 232},
+        {0x8017, 232},
+        {0xc028, 232},
+        {0x8002, 233},
+        {0x8009, 233},
+        {0x8017, 233},
+        {0xc028, 233},
+    },
+    /* 144 */
+    {
+        {0x8003, 198},
+        {0x8006, 198},
+        {0x800a, 198},
+        {0x800f, 198},
+        {0x8018, 198},
+        {0x801f, 198},
+        {0x8029, 198},
+        {0xc038, 198},
+        {0x8003, 228},
+        {0x8006, 228},
+        {0x800a, 228},
+        {0x800f, 228},
+        {0x8018, 228},
+        {0x801f, 228},
+        {0x8029, 228},
+        {0xc038, 228},
+    },
+    /* 145 */
+    {
+        {0x8003, 232},
+        {0x8006, 232},
+        {0x800a, 232},
+        {0x800f, 232},
+        {0x8018, 232},
+        {0x801f, 232},
+        {0x8029, 232},
+        {0xc038, 232},
+        {0x8003, 233},
+        {0x8006, 233},
+        {0x800a, 233},
+        {0x800f, 233},
+        {0x8018, 233},
+        {0x801f, 233},
+        {0x8029, 233},
+        {0xc038, 233},
+    },
+    /* 146 */
+    {
+        {0x8001, 1},
+        {0xc016, 1},
+        {0x8001, 135},
+        {0xc016, 135},
+        {0x8001, 137},
+        {0xc016, 137},
+        {0x8001, 138},
+        {0xc016, 138},
+        {0x8001, 139},
+        {0xc016, 139},
+        {0x8001, 140},
+        {0xc016, 140},
+        {0x8001, 141},
+        {0xc016, 141},
+        {0x8001, 143},
+        {0xc016, 143},
+    },
+    /* 147 */
+    {
+        {0x8002, 1},
+        {0x8009, 1},
+        {0x8017, 1},
+        {0xc028, 1},
+        {0x8002, 135},
+        {0x8009, 135},
+        {0x8017, 135},
+        {0xc028, 135},
+        {0x8002, 137},
+        {0x8009, 137},
+        {0x8017, 137},
+        {0xc028, 137},
+        {0x8002, 138},
+        {0x8009, 138},
+        {0x8017, 138},
+        {0xc028, 138},
+    },
+    /* 148 */
+    {
+        {0x8003, 1},
+        {0x8006, 1},
+        {0x800a, 1},
+        {0x800f, 1},
+        {0x8018, 1},
+        {0x801f, 1},
+        {0x8029, 1},
+        {0xc038, 1},
+        {0x8003, 135},
+        {0x8006, 135},
+        {0x800a, 135},
+        {0x800f, 135},
+        {0x8018, 135},
+        {0x801f, 135},
+        {0x8029, 135},
+        {0xc038, 135},
+    },
+    /* 149 */
+    {
+        {0x8003, 137},
+        {0x8006, 137},
+        {0x800a, 137},
+        {0x800f, 137},
+        {0x8018, 137},
+        {0x801f, 137},
+        {0x8029, 137},
+        {0xc038, 137},
+        {0x8003, 138},
+        {0x8006, 138},
+        {0x800a, 138},
+        {0x800f, 138},
+        {0x8018, 138},
+        {0x801f, 138},
+        {0x8029, 138},
+        {0xc038, 138},
+    },
+    /* 150 */
+    {
+        {0x8002, 139},
+        {0x8009, 139},
+        {0x8017, 139},
+        {0xc028, 139},
+        {0x8002, 140},
+        {0x8009, 140},
+        {0x8017, 140},
+        {0xc028, 140},
+        {0x8002, 141},
+        {0x8009, 141},
+        {0x8017, 141},
+        {0xc028, 141},
+        {0x8002, 143},
+        {0x8009, 143},
+        {0x8017, 143},
+        {0xc028, 143},
+    },
+    /* 151 */
+    {
+        {0x8003, 139},
+        {0x8006, 139},
+        {0x800a, 139},
+        {0x800f, 139},
+        {0x8018, 139},
+        {0x801f, 139},
+        {0x8029, 139},
+        {0xc038, 139},
+        {0x8003, 140},
+        {0x8006, 140},
+        {0x800a, 140},
+        {0x800f, 140},
+        {0x8018, 140},
+        {0x801f, 140},
+        {0x8029, 140},
+        {0xc038, 140},
+    },
+    /* 152 */
+    {
+        {0x8003, 141},
+        {0x8006, 141},
+        {0x800a, 141},
+        {0x800f, 141},
+        {0x8018, 141},
+        {0x801f, 141},
+        {0x8029, 141},
+        {0xc038, 141},
+        {0x8003, 143},
+        {0x8006, 143},
+        {0x800a, 143},
+        {0x800f, 143},
+        {0x8018, 143},
+        {0x801f, 143},
+        {0x8029, 143},
+        {0xc038, 143},
+    },
+    /* 153 */
+    {
+        {0x9d, 0},
+        {0x9e, 0},
+        {0xa0, 0},
+        {0xa1, 0},
+        {0xa4, 0},
+        {0xa5, 0},
+        {0xa7, 0},
+        {0xa8, 0},
+        {0xac, 0},
+        {0xad, 0},
+        {0xaf, 0},
+        {0xb1, 0},
+        {0xb6, 0},
+        {0xb9, 0},
+        {0xbf, 0},
+        {0xcf, 0},
+    },
+    /* 154 */
+    {
+        {0xc000, 147},
+        {0xc000, 149},
+        {0xc000, 150},
+        {0xc000, 151},
+        {0xc000, 152},
+        {0xc000, 155},
+        {0xc000, 157},
+        {0xc000, 158},
+        {0xc000, 165},
+        {0xc000, 166},
+        {0xc000, 168},
+        {0xc000, 174},
+        {0xc000, 175},
+        {0xc000, 180},
+        {0xc000, 182},
+        {0xc000, 183},
+    },
+    /* 155 */
+    {
+        {0x8001, 147},
+        {0xc016, 147},
+        {0x8001, 149},
+        {0xc016, 149},
+        {0x8001, 150},
+        {0xc016, 150},
+        {0x8001, 151},
+        {0xc016, 151},
+        {0x8001, 152},
+        {0xc016, 152},
+        {0x8001, 155},
+        {0xc016, 155},
+        {0x8001, 157},
+        {0xc016, 157},
+        {0x8001, 158},
+        {0xc016, 158},
+    },
+    /* 156 */
+    {
+        {0x8002, 147},
+        {0x8009, 147},
+        {0x8017, 147},
+        {0xc028, 147},
+        {0x8002, 149},
+        {0x8009, 149},
+        {0x8017, 149},
+        {0xc028, 149},
+        {0x8002, 150},
+        {0x8009, 150},
+        {0x8017, 150},
+        {0xc028, 150},
+        {0x8002, 151},
+        {0x8009, 151},
+        {0x8017, 151},
+        {0xc028, 151},
+    },
+    /* 157 */
+    {
+        {0x8003, 147},
+        {0x8006, 147},
+        {0x800a, 147},
+        {0x800f, 147},
+        {0x8018, 147},
+        {0x801f, 147},
+        {0x8029, 147},
+        {0xc038, 147},
+        {0x8003, 149},
+        {0x8006, 149},
+        {0x800a, 149},
+        {0x800f, 149},
+        {0x8018, 149},
+        {0x801f, 149},
+        {0x8029, 149},
+        {0xc038, 149},
+    },
+    /* 158 */
+    {
+        {0x8003, 150},
+        {0x8006, 150},
+        {0x800a, 150},
+        {0x800f, 150},
+        {0x8018, 150},
+        {0x801f, 150},
+        {0x8029, 150},
+        {0xc038, 150},
+        {0x8003, 151},
+        {0x8006, 151},
+        {0x800a, 151},
+        {0x800f, 151},
+        {0x8018, 151},
+        {0x801f, 151},
+        {0x8029, 151},
+        {0xc038, 151},
+    },
+    /* 159 */
+    {
+        {0x8002, 152},
+        {0x8009, 152},
+        {0x8017, 152},
+        {0xc028, 152},
+        {0x8002, 155},
+        {0x8009, 155},
+        {0x8017, 155},
+        {0xc028, 155},
+        {0x8002, 157},
+        {0x8009, 157},
+        {0x8017, 157},
+        {0xc028, 157},
+        {0x8002, 158},
+        {0x8009, 158},
+        {0x8017, 158},
+        {0xc028, 158},
+    },
+    /* 160 */
+    {
+        {0x8003, 152},
+        {0x8006, 152},
+        {0x800a, 152},
+        {0x800f, 152},
+        {0x8018, 152},
+        {0x801f, 152},
+        {0x8029, 152},
+        {0xc038, 152},
+        {0x8003, 155},
+        {0x8006, 155},
+        {0x800a, 155},
+        {0x800f, 155},
+        {0x8018, 155},
+        {0x801f, 155},
+        {0x8029, 155},
+        {0xc038, 155},
+    },
+    /* 161 */
+    {
+        {0x8003, 157},
+        {0x8006, 157},
+        {0x800a, 157},
+        {0x800f, 157},
+        {0x8018, 157},
+        {0x801f, 157},
+        {0x8029, 157},
+        {0xc038, 157},
+        {0x8003, 158},
+        {0x8006, 158},
+        {0x800a, 158},
+        {0x800f, 158},
+        {0x8018, 158},
+        {0x801f, 158},
+        {0x8029, 158},
+        {0xc038, 158},
+    },
+    /* 162 */
+    {
+        {0x8001, 165},
+        {0xc016, 165},
+        {0x8001, 166},
+        {0xc016, 166},
+        {0x8001, 168},
+        {0xc016, 168},
+        {0x8001, 174},
+        {0xc016, 174},
+        {0x8001, 175},
+        {0xc016, 175},
+        {0x8001, 180},
+        {0xc016, 180},
+        {0x8001, 182},
+        {0xc016, 182},
+        {0x8001, 183},
+        {0xc016, 183},
+    },
+    /* 163 */
+    {
+        {0x8002, 165},
+        {0x8009, 165},
+        {0x8017, 165},
+        {0xc028, 165},
+        {0x8002, 166},
+        {0x8009, 166},
+        {0x8017, 166},
+        {0xc028, 166},
+        {0x8002, 168},
+        {0x8009, 168},
+        {0x8017, 168},
+        {0xc028, 168},
+        {0x8002, 174},
+        {0x8009, 174},
+        {0x8017, 174},
+        {0xc028, 174},
+    },
+    /* 164 */
+    {
+        {0x8003, 165},
+        {0x8006, 165},
+        {0x800a, 165},
+        {0x800f, 165},
+        {0x8018, 165},
+        {0x801f, 165},
+        {0x8029, 165},
+        {0xc038, 165},
+        {0x8003, 166},
+        {0x8006, 166},
+        {0x800a, 166},
+        {0x800f, 166},
+        {0x8018, 166},
+        {0x801f, 166},
+        {0x8029, 166},
+        {0xc038, 166},
+    },
+    /* 165 */
+    {
+        {0x8003, 168},
+        {0x8006, 168},
+        {0x800a, 168},
+        {0x800f, 168},
+        {0x8018, 168},
+        {0x801f, 168},
+        {0x8029, 168},
+        {0xc038, 168},
+        {0x8003, 174},
+        {0x8006, 174},
+        {0x800a, 174},
+        {0x800f, 174},
+        {0x8018, 174},
+        {0x801f, 174},
+        {0x8029, 174},
+        {0xc038, 174},
+    },
+    /* 166 */
+    {
+        {0x8002, 175},
+        {0x8009, 175},
+        {0x8017, 175},
+        {0xc028, 175},
+        {0x8002, 180},
+        {0x8009, 180},
+        {0x8017, 180},
+        {0xc028, 180},
+        {0x8002, 182},
+        {0x8009, 182},
+        {0x8017, 182},
+        {0xc028, 182},
+        {0x8002, 183},
+        {0x8009, 183},
+        {0x8017, 183},
+        {0xc028, 183},
+    },
+    /* 167 */
+    {
+        {0x8003, 175},
+        {0x8006, 175},
+        {0x800a, 175},
+        {0x800f, 175},
+        {0x8018, 175},
+        {0x801f, 175},
+        {0x8029, 175},
+        {0xc038, 175},
+        {0x8003, 180},
+        {0x8006, 180},
+        {0x800a, 180},
+        {0x800f, 180},
+        {0x8018, 180},
+        {0x801f, 180},
+        {0x8029, 180},
+        {0xc038, 180},
+    },
+    /* 168 */
+    {
+        {0x8003, 182},
+        {0x8006, 182},
+        {0x800a, 182},
+        {0x800f, 182},
+        {0x8018, 182},
+        {0x801f, 182},
+        {0x8029, 182},
+        {0xc038, 182},
+        {0x8003, 183},
+        {0x8006, 183},
+        {0x800a, 183},
+        {0x800f, 183},
+        {0x8018, 183},
+        {0x801f, 183},
+        {0x8029, 183},
+        {0xc038, 183},
+    },
+    /* 169 */
+    {
+        {0xc000, 188},
+        {0xc000, 191},
+        {0xc000, 197},
+        {0xc000, 231},
+        {0xc000, 239},
+        {0xb0, 0},
+        {0xb2, 0},
+        {0xb3, 0},
+        {0xb7, 0},
+        {0xb8, 0},
+        {0xba, 0},
+        {0xbb, 0},
+        {0xc0, 0},
+        {0xc7, 0},
+        {0xd0, 0},
+        {0xdf, 0},
+    },
+    /* 170 */
+    {
+        {0x8001, 188},
+        {0xc016, 188},
+        {0x8001, 191},
+        {0xc016, 191},
+        {0x8001, 197},
+        {0xc016, 197},
+        {0x8001, 231},
+        {0xc016, 231},
+        {0x8001, 239},
+        {0xc016, 239},
+        {0xc000, 9},
+        {0xc000, 142},
+        {0xc000, 144},
+        {0xc000, 145},
+        {0xc000, 148},
+        {0xc000, 159},
+    },
+    /* 171 */
+    {
+        {0x8002, 188},
+        {0x8009, 188},
+        {0x8017, 188},
+        {0xc028, 188},
+        {0x8002, 191},
+        {0x8009, 191},
+        {0x8017, 191},
+        {0xc028, 191},
+        {0x8002, 197},
+        {0x8009, 197},
+        {0x8017, 197},
+        {0xc028, 197},
+        {0x8002, 231},
+        {0x8009, 231},
+        {0x8017, 231},
+        {0xc028, 231},
+    },
+    /* 172 */
+    {
+        {0x8003, 188},
+        {0x8006, 188},
+        {0x800a, 188},
+        {0x800f, 188},
+        {0x8018, 188},
+        {0x801f, 188},
+        {0x8029, 188},
+        {0xc038, 188},
+        {0x8003, 191},
+        {0x8006, 191},
+        {0x800a, 191},
+        {0x800f, 191},
+        {0x8018, 191},
+        {0x801f, 191},
+        {0x8029, 191},
+        {0xc038, 191},
+    },
+    /* 173 */
+    {
+        {0x8003, 197},
+        {0x8006, 197},
+        {0x800a, 197},
+        {0x800f, 197},
+        {0x8018, 197},
+        {0x801f, 197},
+        {0x8029, 197},
+        {0xc038, 197},
+        {0x8003, 231},
+        {0x8006, 231},
+        {0x800a, 231},
+        {0x800f, 231},
+        {0x8018, 231},
+        {0x801f, 231},
+        {0x8029, 231},
+        {0xc038, 231},
+    },
+    /* 174 */
+    {
+        {0x8002, 239},
+        {0x8009, 239},
+        {0x8017, 239},
+        {0xc028, 239},
+        {0x8001, 9},
+        {0xc016, 9},
+        {0x8001, 142},
+        {0xc016, 142},
+        {0x8001, 144},
+        {0xc016, 144},
+        {0x8001, 145},
+        {0xc016, 145},
+        {0x8001, 148},
+        {0xc016, 148},
+        {0x8001, 159},
+        {0xc016, 159},
+    },
+    /* 175 */
+    {
+        {0x8003, 239},
+        {0x8006, 239},
+        {0x800a, 239},
+        {0x800f, 239},
+        {0x8018, 239},
+        {0x801f, 239},
+        {0x8029, 239},
+        {0xc038, 239},
+        {0x8002, 9},
+        {0x8009, 9},
+        {0x8017, 9},
+        {0xc028, 9},
+        {0x8002, 142},
+        {0x8009, 142},
+        {0x8017, 142},
+        {0xc028, 142},
+    },
+    /* 176 */
+    {
+        {0x8003, 9},
+        {0x8006, 9},
+        {0x800a, 9},
+        {0x800f, 9},
+        {0x8018, 9},
+        {0x801f, 9},
+        {0x8029, 9},
+        {0xc038, 9},
+        {0x8003, 142},
+        {0x8006, 142},
+        {0x800a, 142},
+        {0x800f, 142},
+        {0x8018, 142},
+        {0x801f, 142},
+        {0x8029, 142},
+        {0xc038, 142},
+    },
+    /* 177 */
+    {
+        {0x8002, 144},
+        {0x8009, 144},
+        {0x8017, 144},
+        {0xc028, 144},
+        {0x8002, 145},
+        {0x8009, 145},
+        {0x8017, 145},
+        {0xc028, 145},
+        {0x8002, 148},
+        {0x8009, 148},
+        {0x8017, 148},
+        {0xc028, 148},
+        {0x8002, 159},
+        {0x8009, 159},
+        {0x8017, 159},
+        {0xc028, 159},
+    },
+    /* 178 */
+    {
+        {0x8003, 144},
+        {0x8006, 144},
+        {0x800a, 144},
+        {0x800f, 144},
+        {0x8018, 144},
+        {0x801f, 144},
+        {0x8029, 144},
+        {0xc038, 144},
+        {0x8003, 145},
+        {0x8006, 145},
+        {0x800a, 145},
+        {0x800f, 145},
+        {0x8018, 145},
+        {0x801f, 145},
+        {0x8029, 145},
+        {0xc038, 145},
+    },
+    /* 179 */
+    {
+        {0x8003, 148},
+        {0x8006, 148},
+        {0x800a, 148},
+        {0x800f, 148},
+        {0x8018, 148},
+        {0x801f, 148},
+        {0x8029, 148},
+        {0xc038, 148},
+        {0x8003, 159},
+        {0x8006, 159},
+        {0x800a, 159},
+        {0x800f, 159},
+        {0x8018, 159},
+        {0x801f, 159},
+        {0x8029, 159},
+        {0xc038, 159},
+    },
+    /* 180 */
+    {
+        {0xc000, 171},
+        {0xc000, 206},
+        {0xc000, 215},
+        {0xc000, 225},
+        {0xc000, 236},
+        {0xc000, 237},
+        {0xbc, 0},
+        {0xbd, 0},
+        {0xc1, 0},
+        {0xc4, 0},
+        {0xc8, 0},
+        {0xcb, 0},
+        {0xd1, 0},
+        {0xd8, 0},
+        {0xe0, 0},
+        {0xee, 0},
+    },
+    /* 181 */
+    {
+        {0x8001, 171},
+        {0xc016, 171},
+        {0x8001, 206},
+        {0xc016, 206},
+        {0x8001, 215},
+        {0xc016, 215},
+        {0x8001, 225},
+        {0xc016, 225},
+        {0x8001, 236},
+        {0xc016, 236},
+        {0x8001, 237},
+        {0xc016, 237},
+        {0xc000, 199},
+        {0xc000, 207},
+        {0xc000, 234},
+        {0xc000, 235},
+    },
+    /* 182 */
+    {
+        {0x8002, 171},
+        {0x8009, 171},
+        {0x8017, 171},
+        {0xc028, 171},
+        {0x8002, 206},
+        {0x8009, 206},
+        {0x8017, 206},
+        {0xc028, 206},
+        {0x8002, 215},
+        {0x8009, 215},
+        {0x8017, 215},
+        {0xc028, 215},
+        {0x8002, 225},
+        {0x8009, 225},
+        {0x8017, 225},
+        {0xc028, 225},
+    },
+    /* 183 */
+    {
+        {0x8003, 171},
+        {0x8006, 171},
+        {0x800a, 171},
+        {0x800f, 171},
+        {0x8018, 171},
+        {0x801f, 171},
+        {0x8029, 171},
+        {0xc038, 171},
+        {0x8003, 206},
+        {0x8006, 206},
+        {0x800a, 206},
+        {0x800f, 206},
+        {0x8018, 206},
+        {0x801f, 206},
+        {0x8029, 206},
+        {0xc038, 206},
+    },
+    /* 184 */
+    {
+        {0x8003, 215},
+        {0x8006, 215},
+        {0x800a, 215},
+        {0x800f, 215},
+        {0x8018, 215},
+        {0x801f, 215},
+        {0x8029, 215},
+        {0xc038, 215},
+        {0x8003, 225},
+        {0x8006, 225},
+        {0x800a, 225},
+        {0x800f, 225},
+        {0x8018, 225},
+        {0x801f, 225},
+        {0x8029, 225},
+        {0xc038, 225},
+    },
+    /* 185 */
+    {
+        {0x8002, 236},
+        {0x8009, 236},
+        {0x8017, 236},
+        {0xc028, 236},
+        {0x8002, 237},
+        {0x8009, 237},
+        {0x8017, 237},
+        {0xc028, 237},
+        {0x8001, 199},
+        {0xc016, 199},
+        {0x8001, 207},
+        {0xc016, 207},
+        {0x8001, 234},
+        {0xc016, 234},
+        {0x8001, 235},
+        {0xc016, 235},
+    },
+    /* 186 */
+    {
+        {0x8003, 236},
+        {0x8006, 236},
+        {0x800a, 236},
+        {0x800f, 236},
+        {0x8018, 236},
+        {0x801f, 236},
+        {0x8029, 236},
+        {0xc038, 236},
+        {0x8003, 237},
+        {0x8006, 237},
+        {0x800a, 237},
+        {0x800f, 237},
+        {0x8018, 237},
+        {0x801f, 237},
+        {0x8029, 237},
+        {0xc038, 237},
+    },
+    /* 187 */
+    {
+        {0x8002, 199},
+        {0x8009, 199},
+        {0x8017, 199},
+        {0xc028, 199},
+        {0x8002, 207},
+        {0x8009, 207},
+        {0x8017, 207},
+        {0xc028, 207},
+        {0x8002, 234},
+        {0x8009, 234},
+        {0x8017, 234},
+        {0xc028, 234},
+        {0x8002, 235},
+        {0x8009, 235},
+        {0x8017, 235},
+        {0xc028, 235},
+    },
+    /* 188 */
+    {
+        {0x8003, 199},
+        {0x8006, 199},
+        {0x800a, 199},
+        {0x800f, 199},
+        {0x8018, 199},
+        {0x801f, 199},
+        {0x8029, 199},
+        {0xc038, 199},
+        {0x8003, 207},
+        {0x8006, 207},
+        {0x800a, 207},
+        {0x800f, 207},
+        {0x8018, 207},
+        {0x801f, 207},
+        {0x8029, 207},
+        {0xc038, 207},
+    },
+    /* 189 */
+    {
+        {0x8003, 234},
+        {0x8006, 234},
+        {0x800a, 234},
+        {0x800f, 234},
+        {0x8018, 234},
+        {0x801f, 234},
+        {0x8029, 234},
+        {0xc038, 234},
+        {0x8003, 235},
+        {0x8006, 235},
+        {0x800a, 235},
+        {0x800f, 235},
+        {0x8018, 235},
+        {0x801f, 235},
+        {0x8029, 235},
+        {0xc038, 235},
+    },
+    /* 190 */
+    {
+        {0xc2, 0},
+        {0xc3, 0},
+        {0xc5, 0},
+        {0xc6, 0},
+        {0xc9, 0},
+        {0xca, 0},
+        {0xcc, 0},
+        {0xcd, 0},
+        {0xd2, 0},
+        {0xd5, 0},
+        {0xd9, 0},
+        {0xdc, 0},
+        {0xe1, 0},
+        {0xe7, 0},
+        {0xef, 0},
+        {0xf6, 0},
+    },
+    /* 191 */
+    {
+        {0xc000, 192},
+        {0xc000, 193},
+        {0xc000, 200},
+        {0xc000, 201},
+        {0xc000, 202},
+        {0xc000, 205},
+        {0xc000, 210},
+        {0xc000, 213},
+        {0xc000, 218},
+        {0xc000, 219},
+        {0xc000, 238},
+        {0xc000, 240},
+        {0xc000, 242},
+        {0xc000, 243},
+        {0xc000, 255},
+        {0xce, 0},
+    },
+    /* 192 */
+    {
+        {0x8001, 192},
+        {0xc016, 192},
+        {0x8001, 193},
+        {0xc016, 193},
+        {0x8001, 200},
+        {0xc016, 200},
+        {0x8001, 201},
+        {0xc016, 201},
+        {0x8001, 202},
+        {0xc016, 202},
+        {0x8001, 205},
+        {0xc016, 205},
+        {0x8001, 210},
+        {0xc016, 210},
+        {0x8001, 213},
+        {0xc016, 213},
+    },
+    /* 193 */
+    {
+        {0x8002, 192},
+        {0x8009, 192},
+        {0x8017, 192},
+        {0xc028, 192},
+        {0x8002, 193},
+        {0x8009, 193},
+        {0x8017, 193},
+        {0xc028, 193},
+        {0x8002, 200},
+        {0x8009, 200},
+        {0x8017, 200},
+        {0xc028, 200},
+        {0x8002, 201},
+        {0x8009, 201},
+        {0x8017, 201},
+        {0xc028, 201},
+    },
+    /* 194 */
+    {
+        {0x8003, 192},
+        {0x8006, 192},
+        {0x800a, 192},
+        {0x800f, 192},
+        {0x8018, 192},
+        {0x801f, 192},
+        {0x8029, 192},
+        {0xc038, 192},
+        {0x8003, 193},
+        {0x8006, 193},
+        {0x800a, 193},
+        {0x800f, 193},
+        {0x8018, 193},
+        {0x801f, 193},
+        {0x8029, 193},
+        {0xc038, 193},
+    },
+    /* 195 */
+    {
+        {0x8003, 200},
+        {0x8006, 200},
+        {0x800a, 200},
+        {0x800f, 200},
+        {0x8018, 200},
+        {0x801f, 200},
+        {0x8029, 200},
+        {0xc038, 200},
+        {0x8003, 201},
+        {0x8006, 201},
+        {0x800a, 201},
+        {0x800f, 201},
+        {0x8018, 201},
+        {0x801f, 201},
+        {0x8029, 201},
+        {0xc038, 201},
+    },
+    /* 196 */
+    {
+        {0x8002, 202},
+        {0x8009, 202},
+        {0x8017, 202},
+        {0xc028, 202},
+        {0x8002, 205},
+        {0x8009, 205},
+        {0x8017, 205},
+        {0xc028, 205},
+        {0x8002, 210},
+        {0x8009, 210},
+        {0x8017, 210},
+        {0xc028, 210},
+        {0x8002, 213},
+        {0x8009, 213},
+        {0x8017, 213},
+        {0xc028, 213},
+    },
+    /* 197 */
+    {
+        {0x8003, 202},
+        {0x8006, 202},
+        {0x800a, 202},
+        {0x800f, 202},
+        {0x8018, 202},
+        {0x801f, 202},
+        {0x8029, 202},
+        {0xc038, 202},
+        {0x8003, 205},
+        {0x8006, 205},
+        {0x800a, 205},
+        {0x800f, 205},
+        {0x8018, 205},
+        {0x801f, 205},
+        {0x8029, 205},
+        {0xc038, 205},
+    },
+    /* 198 */
+    {
+        {0x8003, 210},
+        {0x8006, 210},
+        {0x800a, 210},
+        {0x800f, 210},
+        {0x8018, 210},
+        {0x801f, 210},
+        {0x8029, 210},
+        {0xc038, 210},
+        {0x8003, 213},
+        {0x8006, 213},
+        {0x800a, 213},
+        {0x800f, 213},
+        {0x8018, 213},
+        {0x801f, 213},
+        {0x8029, 213},
+        {0xc038, 213},
+    },
+    /* 199 */
+    {
+        {0x8001, 218},
+        {0xc016, 218},
+        {0x8001, 219},
+        {0xc016, 219},
+        {0x8001, 238},
+        {0xc016, 238},
+        {0x8001, 240},
+        {0xc016, 240},
+        {0x8001, 242},
+        {0xc016, 242},
+        {0x8001, 243},
+        {0xc016, 243},
+        {0x8001, 255},
+        {0xc016, 255},
+        {0xc000, 203},
+        {0xc000, 204},
+    },
+    /* 200 */
+    {
+        {0x8002, 218},
+        {0x8009, 218},
+        {0x8017, 218},
+        {0xc028, 218},
+        {0x8002, 219},
+        {0x8009, 219},
+        {0x8017, 219},
+        {0xc028, 219},
+        {0x8002, 238},
+        {0x8009, 238},
+        {0x8017, 238},
+        {0xc028, 238},
+        {0x8002, 240},
+        {0x8009, 240},
+        {0x8017, 240},
+        {0xc028, 240},
+    },
+    /* 201 */
+    {
+        {0x8003, 218},
+        {0x8006, 218},
+        {0x800a, 218},
+        {0x800f, 218},
+        {0x8018, 218},
+        {0x801f, 218},
+        {0x8029, 218},
+        {0xc038, 218},
+        {0x8003, 219},
+        {0x8006, 219},
+        {0x800a, 219},
+        {0x800f, 219},
+        {0x8018, 219},
+        {0x801f, 219},
+        {0x8029, 219},
+        {0xc038, 219},
+    },
+    /* 202 */
+    {
+        {0x8003, 238},
+        {0x8006, 238},
+        {0x800a, 238},
+        {0x800f, 238},
+        {0x8018, 238},
+        {0x801f, 238},
+        {0x8029, 238},
+        {0xc038, 238},
+        {0x8003, 240},
+        {0x8006, 240},
+        {0x800a, 240},
+        {0x800f, 240},
+        {0x8018, 240},
+        {0x801f, 240},
+        {0x8029, 240},
+        {0xc038, 240},
+    },
+    /* 203 */
+    {
+        {0x8002, 242},
+        {0x8009, 242},
+        {0x8017, 242},
+        {0xc028, 242},
+        {0x8002, 243},
+        {0x8009, 243},
+        {0x8017, 243},
+        {0xc028, 243},
+        {0x8002, 255},
+        {0x8009, 255},
+        {0x8017, 255},
+        {0xc028, 255},
+        {0x8001, 203},
+        {0xc016, 203},
+        {0x8001, 204},
+        {0xc016, 204},
+    },
+    /* 204 */
+    {
+        {0x8003, 242},
+        {0x8006, 242},
+        {0x800a, 242},
+        {0x800f, 242},
+        {0x8018, 242},
+        {0x801f, 242},
+        {0x8029, 242},
+        {0xc038, 242},
+        {0x8003, 243},
+        {0x8006, 243},
+        {0x800a, 243},
+        {0x800f, 243},
+        {0x8018, 243},
+        {0x801f, 243},
+        {0x8029, 243},
+        {0xc038, 243},
+    },
+    /* 205 */
+    {
+        {0x8003, 255},
+        {0x8006, 255},
+        {0x800a, 255},
+        {0x800f, 255},
+        {0x8018, 255},
+        {0x801f, 255},
+        {0x8029, 255},
+        {0xc038, 255},
+        {0x8002, 203},
+        {0x8009, 203},
+        {0x8017, 203},
+        {0xc028, 203},
+        {0x8002, 204},
+        {0x8009, 204},
+        {0x8017, 204},
+        {0xc028, 204},
+    },
+    /* 206 */
+    {
+        {0x8003, 203},
+        {0x8006, 203},
+        {0x800a, 203},
+        {0x800f, 203},
+        {0x8018, 203},
+        {0x801f, 203},
+        {0x8029, 203},
+        {0xc038, 203},
+        {0x8003, 204},
+        {0x8006, 204},
+        {0x800a, 204},
+        {0x800f, 204},
+        {0x8018, 204},
+        {0x801f, 204},
+        {0x8029, 204},
+        {0xc038, 204},
+    },
+    /* 207 */
+    {
+        {0xd3, 0},
+        {0xd4, 0},
+        {0xd6, 0},
+        {0xd7, 0},
+        {0xda, 0},
+        {0xdb, 0},
+        {0xdd, 0},
+        {0xde, 0},
+        {0xe2, 0},
+        {0xe4, 0},
+        {0xe8, 0},
+        {0xeb, 0},
+        {0xf0, 0},
+        {0xf3, 0},
+        {0xf7, 0},
+        {0xfa, 0},
+    },
+    /* 208 */
+    {
+        {0xc000, 211},
+        {0xc000, 212},
+        {0xc000, 214},
+        {0xc000, 221},
+        {0xc000, 222},
+        {0xc000, 223},
+        {0xc000, 241},
+        {0xc000, 244},
+        {0xc000, 245},
+        {0xc000, 246},
+        {0xc000, 247},
+        {0xc000, 248},
+        {0xc000, 250},
+        {0xc000, 251},
+        {0xc000, 252},
+        {0xc000, 253},
+    },
+    /* 209 */
+    {
+        {0x8001, 211},
+        {0xc016, 211},
+        {0x8001, 212},
+        {0xc016, 212},
+        {0x8001, 214},
+        {0xc016, 214},
+        {0x8001, 221},
+        {0xc016, 221},
+        {0x8001, 222},
+        {0xc016, 222},
+        {0x8001, 223},
+        {0xc016, 223},
+        {0x8001, 241},
+        {0xc016, 241},
+        {0x8001, 244},
+        {0xc016, 244},
+    },
+    /* 210 */
+    {
+        {0x8002, 211},
+        {0x8009, 211},
+        {0x8017, 211},
+        {0xc028, 211},
+        {0x8002, 212},
+        {0x8009, 212},
+        {0x8017, 212},
+        {0xc028, 212},
+        {0x8002, 214},
+        {0x8009, 214},
+        {0x8017, 214},
+        {0xc028, 214},
+        {0x8002, 221},
+        {0x8009, 221},
+        {0x8017, 221},
+        {0xc028, 221},
+    },
+    /* 211 */
+    {
+        {0x8003, 211},
+        {0x8006, 211},
+        {0x800a, 211},
+        {0x800f, 211},
+        {0x8018, 211},
+        {0x801f, 211},
+        {0x8029, 211},
+        {0xc038, 211},
+        {0x8003, 212},
+        {0x8006, 212},
+        {0x800a, 212},
+        {0x800f, 212},
+        {0x8018, 212},
+        {0x801f, 212},
+        {0x8029, 212},
+        {0xc038, 212},
+    },
+    /* 212 */
+    {
+        {0x8003, 214},
+        {0x8006, 214},
+        {0x800a, 214},
+        {0x800f, 214},
+        {0x8018, 214},
+        {0x801f, 214},
+        {0x8029, 214},
+        {0xc038, 214},
+        {0x8003, 221},
+        {0x8006, 221},
+        {0x800a, 221},
+        {0x800f, 221},
+        {0x8018, 221},
+        {0x801f, 221},
+        {0x8029, 221},
+        {0xc038, 221},
+    },
+    /* 213 */
+    {
+        {0x8002, 222},
+        {0x8009, 222},
+        {0x8017, 222},
+        {0xc028, 222},
+        {0x8002, 223},
+        {0x8009, 223},
+        {0x8017, 223},
+        {0xc028, 223},
+        {0x8002, 241},
+        {0x8009, 241},
+        {0x8017, 241},
+        {0xc028, 241},
+        {0x8002, 244},
+        {0x8009, 244},
+        {0x8017, 244},
+        {0xc028, 244},
+    },
+    /* 214 */
+    {
+        {0x8003, 222},
+        {0x8006, 222},
+        {0x800a, 222},
+        {0x800f, 222},
+        {0x8018, 222},
+        {0x801f, 222},
+        {0x8029, 222},
+        {0xc038, 222},
+        {0x8003, 223},
+        {0x8006, 223},
+        {0x800a, 223},
+        {0x800f, 223},
+        {0x8018, 223},
+        {0x801f, 223},
+        {0x8029, 223},
+        {0xc038, 223},
+    },
+    /* 215 */
+    {
+        {0x8003, 241},
+        {0x8006, 241},
+        {0x800a, 241},
+        {0x800f, 241},
+        {0x8018, 241},
+        {0x801f, 241},
+        {0x8029, 241},
+        {0xc038, 241},
+        {0x8003, 244},
+        {0x8006, 244},
+        {0x800a, 244},
+        {0x800f, 244},
+        {0x8018, 244},
+        {0x801f, 244},
+        {0x8029, 244},
+        {0xc038, 244},
+    },
+    /* 216 */
+    {
+        {0x8001, 245},
+        {0xc016, 245},
+        {0x8001, 246},
+        {0xc016, 246},
+        {0x8001, 247},
+        {0xc016, 247},
+        {0x8001, 248},
+        {0xc016, 248},
+        {0x8001, 250},
+        {0xc016, 250},
+        {0x8001, 251},
+        {0xc016, 251},
+        {0x8001, 252},
+        {0xc016, 252},
+        {0x8001, 253},
+        {0xc016, 253},
+    },
+    /* 217 */
+    {
+        {0x8002, 245},
+        {0x8009, 245},
+        {0x8017, 245},
+        {0xc028, 245},
+        {0x8002, 246},
+        {0x8009, 246},
+        {0x8017, 246},
+        {0xc028, 246},
+        {0x8002, 247},
+        {0x8009, 247},
+        {0x8017, 247},
+        {0xc028, 247},
+        {0x8002, 248},
+        {0x8009, 248},
+        {0x8017, 248},
+        {0xc028, 248},
+    },
+    /* 218 */
+    {
+        {0x8003, 245},
+        {0x8006, 245},
+        {0x800a, 245},
+        {0x800f, 245},
+        {0x8018, 245},
+        {0x801f, 245},
+        {0x8029, 245},
+        {0xc038, 245},
+        {0x8003, 246},
+        {0x8006, 246},
+        {0x800a, 246},
+        {0x800f, 246},
+        {0x8018, 246},
+        {0x801f, 246},
+        {0x8029, 246},
+        {0xc038, 246},
+    },
+    /* 219 */
+    {
+        {0x8003, 247},
+        {0x8006, 247},
+        {0x800a, 247},
+        {0x800f, 247},
+        {0x8018, 247},
+        {0x801f, 247},
+        {0x8029, 247},
+        {0xc038, 247},
+        {0x8003, 248},
+        {0x8006, 248},
+        {0x800a, 248},
+        {0x800f, 248},
+        {0x8018, 248},
+        {0x801f, 248},
+        {0x8029, 248},
+        {0xc038, 248},
+    },
+    /* 220 */
+    {
+        {0x8002, 250},
+        {0x8009, 250},
+        {0x8017, 250},
+        {0xc028, 250},
+        {0x8002, 251},
+        {0x8009, 251},
+        {0x8017, 251},
+        {0xc028, 251},
+        {0x8002, 252},
+        {0x8009, 252},
+        {0x8017, 252},
+        {0xc028, 252},
+        {0x8002, 253},
+        {0x8009, 253},
+        {0x8017, 253},
+        {0xc028, 253},
+    },
+    /* 221 */
+    {
+        {0x8003, 250},
+        {0x8006, 250},
+        {0x800a, 250},
+        {0x800f, 250},
+        {0x8018, 250},
+        {0x801f, 250},
+        {0x8029, 250},
+        {0xc038, 250},
+        {0x8003, 251},
+        {0x8006, 251},
+        {0x800a, 251},
+        {0x800f, 251},
+        {0x8018, 251},
+        {0x801f, 251},
+        {0x8029, 251},
+        {0xc038, 251},
+    },
+    /* 222 */
+    {
+        {0x8003, 252},
+        {0x8006, 252},
+        {0x800a, 252},
+        {0x800f, 252},
+        {0x8018, 252},
+        {0x801f, 252},
+        {0x8029, 252},
+        {0xc038, 252},
+        {0x8003, 253},
+        {0x8006, 253},
+        {0x800a, 253},
+        {0x800f, 253},
+        {0x8018, 253},
+        {0x801f, 253},
+        {0x8029, 253},
+        {0xc038, 253},
+    },
+    /* 223 */
+    {
+        {0xc000, 254},
+        {0xe3, 0},
+        {0xe5, 0},
+        {0xe6, 0},
+        {0xe9, 0},
+        {0xea, 0},
+        {0xec, 0},
+        {0xed, 0},
+        {0xf1, 0},
+        {0xf2, 0},
+        {0xf4, 0},
+        {0xf5, 0},
+        {0xf8, 0},
+        {0xf9, 0},
+        {0xfb, 0},
+        {0xfc, 0},
+    },
+    /* 224 */
+    {
+        {0x8001, 254},
+        {0xc016, 254},
+        {0xc000, 2},
+        {0xc000, 3},
+        {0xc000, 4},
+        {0xc000, 5},
+        {0xc000, 6},
+        {0xc000, 7},
+        {0xc000, 8},
+        {0xc000, 11},
+        {0xc000, 12},
+        {0xc000, 14},
+        {0xc000, 15},
+        {0xc000, 16},
+        {0xc000, 17},
+        {0xc000, 18},
+    },
+    /* 225 */
+    {
+        {0x8002, 254},
+        {0x8009, 254},
+        {0x8017, 254},
+        {0xc028, 254},
+        {0x8001, 2},
+        {0xc016, 2},
+        {0x8001, 3},
+        {0xc016, 3},
+        {0x8001, 4},
+        {0xc016, 4},
+        {0x8001, 5},
+        {0xc016, 5},
+        {0x8001, 6},
+        {0xc016, 6},
+        {0x8001, 7},
+        {0xc016, 7},
+    },
+    /* 226 */
+    {
+        {0x8003, 254},
+        {0x8006, 254},
+        {0x800a, 254},
+        {0x800f, 254},
+        {0x8018, 254},
+        {0x801f, 254},
+        {0x8029, 254},
+        {0xc038, 254},
+        {0x8002, 2},
+        {0x8009, 2},
+        {0x8017, 2},
+        {0xc028, 2},
+        {0x8002, 3},
+        {0x8009, 3},
+        {0x8017, 3},
+        {0xc028, 3},
+    },
+    /* 227 */
+    {
+        {0x8003, 2},
+        {0x8006, 2},
+        {0x800a, 2},
+        {0x800f, 2},
+        {0x8018, 2},
+        {0x801f, 2},
+        {0x8029, 2},
+        {0xc038, 2},
+        {0x8003, 3},
+        {0x8006, 3},
+        {0x800a, 3},
+        {0x800f, 3},
+        {0x8018, 3},
+        {0x801f, 3},
+        {0x8029, 3},
+        {0xc038, 3},
+    },
+    /* 228 */
+    {
+        {0x8002, 4},
+        {0x8009, 4},
+        {0x8017, 4},
+        {0xc028, 4},
+        {0x8002, 5},
+        {0x8009, 5},
+        {0x8017, 5},
+        {0xc028, 5},
+        {0x8002, 6},
+        {0x8009, 6},
+        {0x8017, 6},
+        {0xc028, 6},
+        {0x8002, 7},
+        {0x8009, 7},
+        {0x8017, 7},
+        {0xc028, 7},
+    },
+    /* 229 */
+    {
+        {0x8003, 4},
+        {0x8006, 4},
+        {0x800a, 4},
+        {0x800f, 4},
+        {0x8018, 4},
+        {0x801f, 4},
+        {0x8029, 4},
+        {0xc038, 4},
+        {0x8003, 5},
+        {0x8006, 5},
+        {0x800a, 5},
+        {0x800f, 5},
+        {0x8018, 5},
+        {0x801f, 5},
+        {0x8029, 5},
+        {0xc038, 5},
+    },
+    /* 230 */
+    {
+        {0x8003, 6},
+        {0x8006, 6},
+        {0x800a, 6},
+        {0x800f, 6},
+        {0x8018, 6},
+        {0x801f, 6},
+        {0x8029, 6},
+        {0xc038, 6},
+        {0x8003, 7},
+        {0x8006, 7},
+        {0x800a, 7},
+        {0x800f, 7},
+        {0x8018, 7},
+        {0x801f, 7},
+        {0x8029, 7},
+        {0xc038, 7},
+    },
+    /* 231 */
+    {
+        {0x8001, 8},
+        {0xc016, 8},
+        {0x8001, 11},
+        {0xc016, 11},
+        {0x8001, 12},
+        {0xc016, 12},
+        {0x8001, 14},
+        {0xc016, 14},
+        {0x8001, 15},
+        {0xc016, 15},
+        {0x8001, 16},
+        {0xc016, 16},
+        {0x8001, 17},
+        {0xc016, 17},
+        {0x8001, 18},
+        {0xc016, 18},
+    },
+    /* 232 */
+    {
+        {0x8002, 8},
+        {0x8009, 8},
+        {0x8017, 8},
+        {0xc028, 8},
+        {0x8002, 11},
+        {0x8009, 11},
+        {0x8017, 11},
+        {0xc028, 11},
+        {0x8002, 12},
+        {0x8009, 12},
+        {0x8017, 12},
+        {0xc028, 12},
+        {0x8002, 14},
+        {0x8009, 14},
+        {0x8017, 14},
+        {0xc028, 14},
+    },
+    /* 233 */
+    {
+        {0x8003, 8},
+        {0x8006, 8},
+        {0x800a, 8},
+        {0x800f, 8},
+        {0x8018, 8},
+        {0x801f, 8},
+        {0x8029, 8},
+        {0xc038, 8},
+        {0x8003, 11},
+        {0x8006, 11},
+        {0x800a, 11},
+        {0x800f, 11},
+        {0x8018, 11},
+        {0x801f, 11},
+        {0x8029, 11},
+        {0xc038, 11},
+    },
+    /* 234 */
+    {
+        {0x8003, 12},
+        {0x8006, 12},
+        {0x800a, 12},
+        {0x800f, 12},
+        {0x8018, 12},
+        {0x801f, 12},
+        {0x8029, 12},
+        {0xc038, 12},
+        {0x8003, 14},
+        {0x8006, 14},
+        {0x800a, 14},
+        {0x800f, 14},
+        {0x8018, 14},
+        {0x801f, 14},
+        {0x8029, 14},
+        {0xc038, 14},
+    },
+    /* 235 */
+    {
+        {0x8002, 15},
+        {0x8009, 15},
+        {0x8017, 15},
+        {0xc028, 15},
+        {0x8002, 16},
+        {0x8009, 16},
+        {0x8017, 16},
+        {0xc028, 16},
+        {0x8002, 17},
+        {0x8009, 17},
+        {0x8017, 17},
+        {0xc028, 17},
+        {0x8002, 18},
+        {0x8009, 18},
+        {0x8017, 18},
+        {0xc028, 18},
+    },
+    /* 236 */
+    {
+        {0x8003, 15},
+        {0x8006, 15},
+        {0x800a, 15},
+        {0x800f, 15},
+        {0x8018, 15},
+        {0x801f, 15},
+        {0x8029, 15},
+        {0xc038, 15},
+        {0x8003, 16},
+        {0x8006, 16},
+        {0x800a, 16},
+        {0x800f, 16},
+        {0x8018, 16},
+        {0x801f, 16},
+        {0x8029, 16},
+        {0xc038, 16},
+    },
+    /* 237 */
+    {
+        {0x8003, 17},
+        {0x8006, 17},
+        {0x800a, 17},
+        {0x800f, 17},
+        {0x8018, 17},
+        {0x801f, 17},
+        {0x8029, 17},
+        {0xc038, 17},
+        {0x8003, 18},
+        {0x8006, 18},
+        {0x800a, 18},
+        {0x800f, 18},
+        {0x8018, 18},
+        {0x801f, 18},
+        {0x8029, 18},
+        {0xc038, 18},
+    },
+    /* 238 */
+    {
+        {0xc000, 19},
+        {0xc000, 20},
+        {0xc000, 21},
+        {0xc000, 23},
+        {0xc000, 24},
+        {0xc000, 25},
+        {0xc000, 26},
+        {0xc000, 27},
+        {0xc000, 28},
+        {0xc000, 29},
+        {0xc000, 30},
+        {0xc000, 31},
+        {0xc000, 127},
+        {0xc000, 220},
+        {0xc000, 249},
+        {0xfd, 0},
+    },
+    /* 239 */
+    {
+        {0x8001, 19},
+        {0xc016, 19},
+        {0x8001, 20},
+        {0xc016, 20},
+        {0x8001, 21},
+        {0xc016, 21},
+        {0x8001, 23},
+        {0xc016, 23},
+        {0x8001, 24},
+        {0xc016, 24},
+        {0x8001, 25},
+        {0xc016, 25},
+        {0x8001, 26},
+        {0xc016, 26},
+        {0x8001, 27},
+        {0xc016, 27},
+    },
+    /* 240 */
+    {
+        {0x8002, 19},
+        {0x8009, 19},
+        {0x8017, 19},
+        {0xc028, 19},
+        {0x8002, 20},
+        {0x8009, 20},
+        {0x8017, 20},
+        {0xc028, 20},
+        {0x8002, 21},
+        {0x8009, 21},
+        {0x8017, 21},
+        {0xc028, 21},
+        {0x8002, 23},
+        {0x8009, 23},
+        {0x8017, 23},
+        {0xc028, 23},
+    },
+    /* 241 */
+    {
+        {0x8003, 19},
+        {0x8006, 19},
+        {0x800a, 19},
+        {0x800f, 19},
+        {0x8018, 19},
+        {0x801f, 19},
+        {0x8029, 19},
+        {0xc038, 19},
+        {0x8003, 20},
+        {0x8006, 20},
+        {0x800a, 20},
+        {0x800f, 20},
+        {0x8018, 20},
+        {0x801f, 20},
+        {0x8029, 20},
+        {0xc038, 20},
+    },
+    /* 242 */
+    {
+        {0x8003, 21},
+        {0x8006, 21},
+        {0x800a, 21},
+        {0x800f, 21},
+        {0x8018, 21},
+        {0x801f, 21},
+        {0x8029, 21},
+        {0xc038, 21},
+        {0x8003, 23},
+        {0x8006, 23},
+        {0x800a, 23},
+        {0x800f, 23},
+        {0x8018, 23},
+        {0x801f, 23},
+        {0x8029, 23},
+        {0xc038, 23},
+    },
+    /* 243 */
+    {
+        {0x8002, 24},
+        {0x8009, 24},
+        {0x8017, 24},
+        {0xc028, 24},
+        {0x8002, 25},
+        {0x8009, 25},
+        {0x8017, 25},
+        {0xc028, 25},
+        {0x8002, 26},
+        {0x8009, 26},
+        {0x8017, 26},
+        {0xc028, 26},
+        {0x8002, 27},
+        {0x8009, 27},
+        {0x8017, 27},
+        {0xc028, 27},
+    },
+    /* 244 */
+    {
+        {0x8003, 24},
+        {0x8006, 24},
+        {0x800a, 24},
+        {0x800f, 24},
+        {0x8018, 24},
+        {0x801f, 24},
+        {0x8029, 24},
+        {0xc038, 24},
+        {0x8003, 25},
+        {0x8006, 25},
+        {0x800a, 25},
+        {0x800f, 25},
+        {0x8018, 25},
+        {0x801f, 25},
+        {0x8029, 25},
+        {0xc038, 25},
+    },
+    /* 245 */
+    {
+        {0x8003, 26},
+        {0x8006, 26},
+        {0x800a, 26},
+        {0x800f, 26},
+        {0x8018, 26},
+        {0x801f, 26},
+        {0x8029, 26},
+        {0xc038, 26},
+        {0x8003, 27},
+        {0x8006, 27},
+        {0x800a, 27},
+        {0x800f, 27},
+        {0x8018, 27},
+        {0x801f, 27},
+        {0x8029, 27},
+        {0xc038, 27},
+    },
+    /* 246 */
+    {
+        {0x8001, 28},
+        {0xc016, 28},
+        {0x8001, 29},
+        {0xc016, 29},
+        {0x8001, 30},
+        {0xc016, 30},
+        {0x8001, 31},
+        {0xc016, 31},
+        {0x8001, 127},
+        {0xc016, 127},
+        {0x8001, 220},
+        {0xc016, 220},
+        {0x8001, 249},
+        {0xc016, 249},
+        {0xfe, 0},
+        {0xff, 0},
+    },
+    /* 247 */
+    {
+        {0x8002, 28},
+        {0x8009, 28},
+        {0x8017, 28},
+        {0xc028, 28},
+        {0x8002, 29},
+        {0x8009, 29},
+        {0x8017, 29},
+        {0xc028, 29},
+        {0x8002, 30},
+        {0x8009, 30},
+        {0x8017, 30},
+        {0xc028, 30},
+        {0x8002, 31},
+        {0x8009, 31},
+        {0x8017, 31},
+        {0xc028, 31},
+    },
+    /* 248 */
+    {
+        {0x8003, 28},
+        {0x8006, 28},
+        {0x800a, 28},
+        {0x800f, 28},
+        {0x8018, 28},
+        {0x801f, 28},
+        {0x8029, 28},
+        {0xc038, 28},
+        {0x8003, 29},
+        {0x8006, 29},
+        {0x800a, 29},
+        {0x800f, 29},
+        {0x8018, 29},
+        {0x801f, 29},
+        {0x8029, 29},
+        {0xc038, 29},
+    },
+    /* 249 */
+    {
+        {0x8003, 30},
+        {0x8006, 30},
+        {0x800a, 30},
+        {0x800f, 30},
+        {0x8018, 30},
+        {0x801f, 30},
+        {0x8029, 30},
+        {0xc038, 30},
+        {0x8003, 31},
+        {0x8006, 31},
+        {0x800a, 31},
+        {0x800f, 31},
+        {0x8018, 31},
+        {0x801f, 31},
+        {0x8029, 31},
+        {0xc038, 31},
+    },
+    /* 250 */
+    {
+        {0x8002, 127},
+        {0x8009, 127},
+        {0x8017, 127},
+        {0xc028, 127},
+        {0x8002, 220},
+        {0x8009, 220},
+        {0x8017, 220},
+        {0xc028, 220},
+        {0x8002, 249},
+        {0x8009, 249},
+        {0x8017, 249},
+        {0xc028, 249},
+        {0xc000, 10},
+        {0xc000, 13},
+        {0xc000, 22},
+        {0x100, 0},
+    },
+    /* 251 */
+    {
+        {0x8003, 127},
+        {0x8006, 127},
+        {0x800a, 127},
+        {0x800f, 127},
+        {0x8018, 127},
+        {0x801f, 127},
+        {0x8029, 127},
+        {0xc038, 127},
+        {0x8003, 220},
+        {0x8006, 220},
+        {0x800a, 220},
+        {0x800f, 220},
+        {0x8018, 220},
+        {0x801f, 220},
+        {0x8029, 220},
+        {0xc038, 220},
+    },
+    /* 252 */
+    {
+        {0x8003, 249},
+        {0x8006, 249},
+        {0x800a, 249},
+        {0x800f, 249},
+        {0x8018, 249},
+        {0x801f, 249},
+        {0x8029, 249},
+        {0xc038, 249},
+        {0x8001, 10},
+        {0xc016, 10},
+        {0x8001, 13},
+        {0xc016, 13},
+        {0x8001, 22},
+        {0xc016, 22},
+        {0x100, 0},
+        {0x100, 0},
+    },
+    /* 253 */
+    {
+        {0x8002, 10},
+        {0x8009, 10},
+        {0x8017, 10},
+        {0xc028, 10},
+        {0x8002, 13},
+        {0x8009, 13},
+        {0x8017, 13},
+        {0xc028, 13},
+        {0x8002, 22},
+        {0x8009, 22},
+        {0x8017, 22},
+        {0xc028, 22},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+    },
+    /* 254 */
+    {
+        {0x8003, 10},
+        {0x8006, 10},
+        {0x800a, 10},
+        {0x800f, 10},
+        {0x8018, 10},
+        {0x801f, 10},
+        {0x8029, 10},
+        {0xc038, 10},
+        {0x8003, 13},
+        {0x8006, 13},
+        {0x800a, 13},
+        {0x800f, 13},
+        {0x8018, 13},
+        {0x801f, 13},
+        {0x8029, 13},
+        {0xc038, 13},
+    },
+    /* 255 */
+    {
+        {0x8003, 22},
+        {0x8006, 22},
+        {0x800a, 22},
+        {0x800f, 22},
+        {0x8018, 22},
+        {0x801f, 22},
+        {0x8029, 22},
+        {0xc038, 22},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+    },
+    /* 256 */
+    {
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+        {0x100, 0},
+    },
+};

lib/nghttp2_helper.c

@@ -0,0 +1,629 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_helper.h"
+
+#include <assert.h>
+#include <string.h>
+
+#include "nghttp2_net.h"
+
+void nghttp2_put_uint16be(uint8_t *buf, uint16_t n) {
+  uint16_t x = htons(n);
+  memcpy(buf, &x, sizeof(uint16_t));
+}
+
+void nghttp2_put_uint32be(uint8_t *buf, uint32_t n) {
+  uint32_t x = htonl(n);
+  memcpy(buf, &x, sizeof(uint32_t));
+}
+
+uint16_t nghttp2_get_uint16(const uint8_t *data) {
+  uint16_t n;
+  memcpy(&n, data, sizeof(uint16_t));
+  return ntohs(n);
+}
+
+uint32_t nghttp2_get_uint32(const uint8_t *data) {
+  uint32_t n;
+  memcpy(&n, data, sizeof(uint32_t));
+  return ntohl(n);
+}
+
+/* Generated by gendowncasetbl.py */
+static const uint8_t DOWNCASE_TBL[] = {
+    0 /* NUL  */,   1 /* SOH  */,   2 /* STX  */,   3 /* ETX  */,
+    4 /* EOT  */,   5 /* ENQ  */,   6 /* ACK  */,   7 /* BEL  */,
+    8 /* BS   */,   9 /* HT   */,   10 /* LF   */,  11 /* VT   */,
+    12 /* FF   */,  13 /* CR   */,  14 /* SO   */,  15 /* SI   */,
+    16 /* DLE  */,  17 /* DC1  */,  18 /* DC2  */,  19 /* DC3  */,
+    20 /* DC4  */,  21 /* NAK  */,  22 /* SYN  */,  23 /* ETB  */,
+    24 /* CAN  */,  25 /* EM   */,  26 /* SUB  */,  27 /* ESC  */,
+    28 /* FS   */,  29 /* GS   */,  30 /* RS   */,  31 /* US   */,
+    32 /* SPC  */,  33 /* !    */,  34 /* "    */,  35 /* #    */,
+    36 /* $    */,  37 /* %    */,  38 /* &    */,  39 /* '    */,
+    40 /* (    */,  41 /* )    */,  42 /* *    */,  43 /* +    */,
+    44 /* ,    */,  45 /* -    */,  46 /* .    */,  47 /* /    */,
+    48 /* 0    */,  49 /* 1    */,  50 /* 2    */,  51 /* 3    */,
+    52 /* 4    */,  53 /* 5    */,  54 /* 6    */,  55 /* 7    */,
+    56 /* 8    */,  57 /* 9    */,  58 /* :    */,  59 /* ;    */,
+    60 /* <    */,  61 /* =    */,  62 /* >    */,  63 /* ?    */,
+    64 /* @    */,  97 /* A    */,  98 /* B    */,  99 /* C    */,
+    100 /* D    */, 101 /* E    */, 102 /* F    */, 103 /* G    */,
+    104 /* H    */, 105 /* I    */, 106 /* J    */, 107 /* K    */,
+    108 /* L    */, 109 /* M    */, 110 /* N    */, 111 /* O    */,
+    112 /* P    */, 113 /* Q    */, 114 /* R    */, 115 /* S    */,
+    116 /* T    */, 117 /* U    */, 118 /* V    */, 119 /* W    */,
+    120 /* X    */, 121 /* Y    */, 122 /* Z    */, 91 /* [    */,
+    92 /* \    */,  93 /* ]    */,  94 /* ^    */,  95 /* _    */,
+    96 /* `    */,  97 /* a    */,  98 /* b    */,  99 /* c    */,
+    100 /* d    */, 101 /* e    */, 102 /* f    */, 103 /* g    */,
+    104 /* h    */, 105 /* i    */, 106 /* j    */, 107 /* k    */,
+    108 /* l    */, 109 /* m    */, 110 /* n    */, 111 /* o    */,
+    112 /* p    */, 113 /* q    */, 114 /* r    */, 115 /* s    */,
+    116 /* t    */, 117 /* u    */, 118 /* v    */, 119 /* w    */,
+    120 /* x    */, 121 /* y    */, 122 /* z    */, 123 /* {    */,
+    124 /* |    */, 125 /* }    */, 126 /* ~    */, 127 /* DEL  */,
+    128 /* 0x80 */, 129 /* 0x81 */, 130 /* 0x82 */, 131 /* 0x83 */,
+    132 /* 0x84 */, 133 /* 0x85 */, 134 /* 0x86 */, 135 /* 0x87 */,
+    136 /* 0x88 */, 137 /* 0x89 */, 138 /* 0x8a */, 139 /* 0x8b */,
+    140 /* 0x8c */, 141 /* 0x8d */, 142 /* 0x8e */, 143 /* 0x8f */,
+    144 /* 0x90 */, 145 /* 0x91 */, 146 /* 0x92 */, 147 /* 0x93 */,
+    148 /* 0x94 */, 149 /* 0x95 */, 150 /* 0x96 */, 151 /* 0x97 */,
+    152 /* 0x98 */, 153 /* 0x99 */, 154 /* 0x9a */, 155 /* 0x9b */,
+    156 /* 0x9c */, 157 /* 0x9d */, 158 /* 0x9e */, 159 /* 0x9f */,
+    160 /* 0xa0 */, 161 /* 0xa1 */, 162 /* 0xa2 */, 163 /* 0xa3 */,
+    164 /* 0xa4 */, 165 /* 0xa5 */, 166 /* 0xa6 */, 167 /* 0xa7 */,
+    168 /* 0xa8 */, 169 /* 0xa9 */, 170 /* 0xaa */, 171 /* 0xab */,
+    172 /* 0xac */, 173 /* 0xad */, 174 /* 0xae */, 175 /* 0xaf */,
+    176 /* 0xb0 */, 177 /* 0xb1 */, 178 /* 0xb2 */, 179 /* 0xb3 */,
+    180 /* 0xb4 */, 181 /* 0xb5 */, 182 /* 0xb6 */, 183 /* 0xb7 */,
+    184 /* 0xb8 */, 185 /* 0xb9 */, 186 /* 0xba */, 187 /* 0xbb */,
+    188 /* 0xbc */, 189 /* 0xbd */, 190 /* 0xbe */, 191 /* 0xbf */,
+    192 /* 0xc0 */, 193 /* 0xc1 */, 194 /* 0xc2 */, 195 /* 0xc3 */,
+    196 /* 0xc4 */, 197 /* 0xc5 */, 198 /* 0xc6 */, 199 /* 0xc7 */,
+    200 /* 0xc8 */, 201 /* 0xc9 */, 202 /* 0xca */, 203 /* 0xcb */,
+    204 /* 0xcc */, 205 /* 0xcd */, 206 /* 0xce */, 207 /* 0xcf */,
+    208 /* 0xd0 */, 209 /* 0xd1 */, 210 /* 0xd2 */, 211 /* 0xd3 */,
+    212 /* 0xd4 */, 213 /* 0xd5 */, 214 /* 0xd6 */, 215 /* 0xd7 */,
+    216 /* 0xd8 */, 217 /* 0xd9 */, 218 /* 0xda */, 219 /* 0xdb */,
+    220 /* 0xdc */, 221 /* 0xdd */, 222 /* 0xde */, 223 /* 0xdf */,
+    224 /* 0xe0 */, 225 /* 0xe1 */, 226 /* 0xe2 */, 227 /* 0xe3 */,
+    228 /* 0xe4 */, 229 /* 0xe5 */, 230 /* 0xe6 */, 231 /* 0xe7 */,
+    232 /* 0xe8 */, 233 /* 0xe9 */, 234 /* 0xea */, 235 /* 0xeb */,
+    236 /* 0xec */, 237 /* 0xed */, 238 /* 0xee */, 239 /* 0xef */,
+    240 /* 0xf0 */, 241 /* 0xf1 */, 242 /* 0xf2 */, 243 /* 0xf3 */,
+    244 /* 0xf4 */, 245 /* 0xf5 */, 246 /* 0xf6 */, 247 /* 0xf7 */,
+    248 /* 0xf8 */, 249 /* 0xf9 */, 250 /* 0xfa */, 251 /* 0xfb */,
+    252 /* 0xfc */, 253 /* 0xfd */, 254 /* 0xfe */, 255 /* 0xff */,
+};
+
+void nghttp2_downcase(uint8_t *s, size_t len) {
+  size_t i;
+  for (i = 0; i < len; ++i) {
+    s[i] = DOWNCASE_TBL[s[i]];
+  }
+}
+
+/*
+ *   local_window_size
+ *   ^  *
+ *   |  *    recv_window_size
+ *   |  *  * ^
+ *   |  *  * |
+ *  0+++++++++
+ *   |  *  *   \
+ *   |  *  *   | This rage is hidden in flow control.  But it must be
+ *   v  *  *   / kept in order to restore it when window size is enlarged.
+ *   recv_reduction
+ *   (+ for negative direction)
+ *
+ *   recv_window_size could be negative if we decrease
+ *   local_window_size more than recv_window_size:
+ *
+ *   local_window_size
+ *   ^  *
+ *   |  *
+ *   |  *
+ *   0++++++++
+ *   |  *    ^ recv_window_size (negative)
+ *   |  *    |
+ *   v  *  *
+ *   recv_reduction
+ */
+int nghttp2_adjust_local_window_size(int32_t *local_window_size_ptr,
+                                     int32_t *recv_window_size_ptr,
+                                     int32_t *recv_reduction_ptr,
+                                     int32_t *delta_ptr) {
+  if (*delta_ptr > 0) {
+    int32_t recv_reduction_delta;
+    int32_t delta;
+    int32_t new_recv_window_size =
+        nghttp2_max(0, *recv_window_size_ptr) - *delta_ptr;
+
+    if (new_recv_window_size >= 0) {
+      *recv_window_size_ptr = new_recv_window_size;
+      return 0;
+    }
+
+    delta = -new_recv_window_size;
+
+    /* The delta size is strictly more than received bytes. Increase
+       local_window_size by that difference |delta|. */
+    if (*local_window_size_ptr > NGHTTP2_MAX_WINDOW_SIZE - delta) {
+      return NGHTTP2_ERR_FLOW_CONTROL;
+    }
+    *local_window_size_ptr += delta;
+    /* If there is recv_reduction due to earlier window_size
+       reduction, we have to adjust it too. */
+    recv_reduction_delta = nghttp2_min(*recv_reduction_ptr, delta);
+    *recv_reduction_ptr -= recv_reduction_delta;
+    if (*recv_window_size_ptr < 0) {
+      *recv_window_size_ptr += recv_reduction_delta;
+    } else {
+      /* If *recv_window_size_ptr > 0, then those bytes are going to
+         be returned to the remote peer (by WINDOW_UPDATE with the
+         adjusted *delta_ptr), so it is effectively 0 now.  We set to
+         *recv_reduction_delta, because caller does not take into
+         account it in *delta_ptr. */
+      *recv_window_size_ptr = recv_reduction_delta;
+    }
+    /* recv_reduction_delta must be paid from *delta_ptr, since it was
+       added in window size reduction (see below). */
+    *delta_ptr -= recv_reduction_delta;
+
+    return 0;
+  }
+
+  if (*local_window_size_ptr + *delta_ptr < 0 ||
+      *recv_window_size_ptr < INT32_MIN - *delta_ptr ||
+      *recv_reduction_ptr > INT32_MAX + *delta_ptr) {
+    return NGHTTP2_ERR_FLOW_CONTROL;
+  }
+  /* Decreasing local window size. Note that we achieve this without
+     noticing to the remote peer. To do this, we cut
+     recv_window_size by -delta. This means that we don't send
+     WINDOW_UPDATE for -delta bytes. */
+  *local_window_size_ptr += *delta_ptr;
+  *recv_window_size_ptr += *delta_ptr;
+  *recv_reduction_ptr -= *delta_ptr;
+  *delta_ptr = 0;
+
+  return 0;
+}
+
+int nghttp2_increase_local_window_size(int32_t *local_window_size_ptr,
+                                       int32_t *recv_window_size_ptr,
+                                       int32_t *recv_reduction_ptr,
+                                       int32_t *delta_ptr) {
+  int32_t recv_reduction_delta;
+  int32_t delta;
+
+  delta = *delta_ptr;
+
+  assert(delta >= 0);
+
+  /* The delta size is strictly more than received bytes. Increase
+     local_window_size by that difference |delta|. */
+  if (*local_window_size_ptr > NGHTTP2_MAX_WINDOW_SIZE - delta) {
+    return NGHTTP2_ERR_FLOW_CONTROL;
+  }
+
+  *local_window_size_ptr += delta;
+  /* If there is recv_reduction due to earlier window_size
+     reduction, we have to adjust it too. */
+  recv_reduction_delta = nghttp2_min(*recv_reduction_ptr, delta);
+  *recv_reduction_ptr -= recv_reduction_delta;
+
+  *recv_window_size_ptr += recv_reduction_delta;
+
+  /* recv_reduction_delta must be paid from *delta_ptr, since it was
+     added in window size reduction (see below). */
+  *delta_ptr -= recv_reduction_delta;
+
+  return 0;
+}
+
+int nghttp2_should_send_window_update(int32_t local_window_size,
+                                      int32_t recv_window_size) {
+  return recv_window_size > 0 && recv_window_size >= local_window_size / 2;
+}
+
+const char *nghttp2_strerror(int error_code) {
+  switch (error_code) {
+  case 0:
+    return "Success";
+  case NGHTTP2_ERR_INVALID_ARGUMENT:
+    return "Invalid argument";
+  case NGHTTP2_ERR_BUFFER_ERROR:
+    return "Out of buffer space";
+  case NGHTTP2_ERR_UNSUPPORTED_VERSION:
+    return "Unsupported SPDY version";
+  case NGHTTP2_ERR_WOULDBLOCK:
+    return "Operation would block";
+  case NGHTTP2_ERR_PROTO:
+    return "Protocol error";
+  case NGHTTP2_ERR_INVALID_FRAME:
+    return "Invalid frame octets";
+  case NGHTTP2_ERR_EOF:
+    return "EOF";
+  case NGHTTP2_ERR_DEFERRED:
+    return "Data transfer deferred";
+  case NGHTTP2_ERR_STREAM_ID_NOT_AVAILABLE:
+    return "No more Stream ID available";
+  case NGHTTP2_ERR_STREAM_CLOSED:
+    return "Stream was already closed or invalid";
+  case NGHTTP2_ERR_STREAM_CLOSING:
+    return "Stream is closing";
+  case NGHTTP2_ERR_STREAM_SHUT_WR:
+    return "The transmission is not allowed for this stream";
+  case NGHTTP2_ERR_INVALID_STREAM_ID:
+    return "Stream ID is invalid";
+  case NGHTTP2_ERR_INVALID_STREAM_STATE:
+    return "Invalid stream state";
+  case NGHTTP2_ERR_DEFERRED_DATA_EXIST:
+    return "Another DATA frame has already been deferred";
+  case NGHTTP2_ERR_START_STREAM_NOT_ALLOWED:
+    return "request HEADERS is not allowed";
+  case NGHTTP2_ERR_GOAWAY_ALREADY_SENT:
+    return "GOAWAY has already been sent";
+  case NGHTTP2_ERR_INVALID_HEADER_BLOCK:
+    return "Invalid header block";
+  case NGHTTP2_ERR_INVALID_STATE:
+    return "Invalid state";
+  case NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE:
+    return "The user callback function failed due to the temporal error";
+  case NGHTTP2_ERR_FRAME_SIZE_ERROR:
+    return "The length of the frame is invalid";
+  case NGHTTP2_ERR_HEADER_COMP:
+    return "Header compression/decompression error";
+  case NGHTTP2_ERR_FLOW_CONTROL:
+    return "Flow control error";
+  case NGHTTP2_ERR_INSUFF_BUFSIZE:
+    return "Insufficient buffer size given to function";
+  case NGHTTP2_ERR_PAUSE:
+    return "Callback was paused by the application";
+  case NGHTTP2_ERR_TOO_MANY_INFLIGHT_SETTINGS:
+    return "Too many inflight SETTINGS";
+  case NGHTTP2_ERR_PUSH_DISABLED:
+    return "Server push is disabled by peer";
+  case NGHTTP2_ERR_DATA_EXIST:
+    return "DATA or HEADERS frame has already been submitted for the stream";
+  case NGHTTP2_ERR_SESSION_CLOSING:
+    return "The current session is closing";
+  case NGHTTP2_ERR_HTTP_HEADER:
+    return "Invalid HTTP header field was received";
+  case NGHTTP2_ERR_HTTP_MESSAGING:
+    return "Violation in HTTP messaging rule";
+  case NGHTTP2_ERR_REFUSED_STREAM:
+    return "Stream was refused";
+  case NGHTTP2_ERR_INTERNAL:
+    return "Internal error";
+  case NGHTTP2_ERR_CANCEL:
+    return "Cancel";
+  case NGHTTP2_ERR_SETTINGS_EXPECTED:
+    return "When a local endpoint expects to receive SETTINGS frame, it "
+           "receives an other type of frame";
+  case NGHTTP2_ERR_NOMEM:
+    return "Out of memory";
+  case NGHTTP2_ERR_CALLBACK_FAILURE:
+    return "The user callback function failed";
+  case NGHTTP2_ERR_BAD_CLIENT_MAGIC:
+    return "Received bad client magic byte string";
+  case NGHTTP2_ERR_FLOODED:
+    return "Flooding was detected in this HTTP/2 session, and it must be "
+           "closed";
+  default:
+    return "Unknown error code";
+  }
+}
+
+/* Generated by gennmchartbl.py */
+static const int VALID_HD_NAME_CHARS[] = {
+    0 /* NUL  */, 0 /* SOH  */, 0 /* STX  */, 0 /* ETX  */,
+    0 /* EOT  */, 0 /* ENQ  */, 0 /* ACK  */, 0 /* BEL  */,
+    0 /* BS   */, 0 /* HT   */, 0 /* LF   */, 0 /* VT   */,
+    0 /* FF   */, 0 /* CR   */, 0 /* SO   */, 0 /* SI   */,
+    0 /* DLE  */, 0 /* DC1  */, 0 /* DC2  */, 0 /* DC3  */,
+    0 /* DC4  */, 0 /* NAK  */, 0 /* SYN  */, 0 /* ETB  */,
+    0 /* CAN  */, 0 /* EM   */, 0 /* SUB  */, 0 /* ESC  */,
+    0 /* FS   */, 0 /* GS   */, 0 /* RS   */, 0 /* US   */,
+    0 /* SPC  */, 1 /* !    */, 0 /* "    */, 1 /* #    */,
+    1 /* $    */, 1 /* %    */, 1 /* &    */, 1 /* '    */,
+    0 /* (    */, 0 /* )    */, 1 /* *    */, 1 /* +    */,
+    0 /* ,    */, 1 /* -    */, 1 /* .    */, 0 /* /    */,
+    1 /* 0    */, 1 /* 1    */, 1 /* 2    */, 1 /* 3    */,
+    1 /* 4    */, 1 /* 5    */, 1 /* 6    */, 1 /* 7    */,
+    1 /* 8    */, 1 /* 9    */, 0 /* :    */, 0 /* ;    */,
+    0 /* <    */, 0 /* =    */, 0 /* >    */, 0 /* ?    */,
+    0 /* @    */, 0 /* A    */, 0 /* B    */, 0 /* C    */,
+    0 /* D    */, 0 /* E    */, 0 /* F    */, 0 /* G    */,
+    0 /* H    */, 0 /* I    */, 0 /* J    */, 0 /* K    */,
+    0 /* L    */, 0 /* M    */, 0 /* N    */, 0 /* O    */,
+    0 /* P    */, 0 /* Q    */, 0 /* R    */, 0 /* S    */,
+    0 /* T    */, 0 /* U    */, 0 /* V    */, 0 /* W    */,
+    0 /* X    */, 0 /* Y    */, 0 /* Z    */, 0 /* [    */,
+    0 /* \    */, 0 /* ]    */, 1 /* ^    */, 1 /* _    */,
+    1 /* `    */, 1 /* a    */, 1 /* b    */, 1 /* c    */,
+    1 /* d    */, 1 /* e    */, 1 /* f    */, 1 /* g    */,
+    1 /* h    */, 1 /* i    */, 1 /* j    */, 1 /* k    */,
+    1 /* l    */, 1 /* m    */, 1 /* n    */, 1 /* o    */,
+    1 /* p    */, 1 /* q    */, 1 /* r    */, 1 /* s    */,
+    1 /* t    */, 1 /* u    */, 1 /* v    */, 1 /* w    */,
+    1 /* x    */, 1 /* y    */, 1 /* z    */, 0 /* {    */,
+    1 /* |    */, 0 /* }    */, 1 /* ~    */, 0 /* DEL  */,
+    0 /* 0x80 */, 0 /* 0x81 */, 0 /* 0x82 */, 0 /* 0x83 */,
+    0 /* 0x84 */, 0 /* 0x85 */, 0 /* 0x86 */, 0 /* 0x87 */,
+    0 /* 0x88 */, 0 /* 0x89 */, 0 /* 0x8a */, 0 /* 0x8b */,
+    0 /* 0x8c */, 0 /* 0x8d */, 0 /* 0x8e */, 0 /* 0x8f */,
+    0 /* 0x90 */, 0 /* 0x91 */, 0 /* 0x92 */, 0 /* 0x93 */,
+    0 /* 0x94 */, 0 /* 0x95 */, 0 /* 0x96 */, 0 /* 0x97 */,
+    0 /* 0x98 */, 0 /* 0x99 */, 0 /* 0x9a */, 0 /* 0x9b */,
+    0 /* 0x9c */, 0 /* 0x9d */, 0 /* 0x9e */, 0 /* 0x9f */,
+    0 /* 0xa0 */, 0 /* 0xa1 */, 0 /* 0xa2 */, 0 /* 0xa3 */,
+    0 /* 0xa4 */, 0 /* 0xa5 */, 0 /* 0xa6 */, 0 /* 0xa7 */,
+    0 /* 0xa8 */, 0 /* 0xa9 */, 0 /* 0xaa */, 0 /* 0xab */,
+    0 /* 0xac */, 0 /* 0xad */, 0 /* 0xae */, 0 /* 0xaf */,
+    0 /* 0xb0 */, 0 /* 0xb1 */, 0 /* 0xb2 */, 0 /* 0xb3 */,
+    0 /* 0xb4 */, 0 /* 0xb5 */, 0 /* 0xb6 */, 0 /* 0xb7 */,
+    0 /* 0xb8 */, 0 /* 0xb9 */, 0 /* 0xba */, 0 /* 0xbb */,
+    0 /* 0xbc */, 0 /* 0xbd */, 0 /* 0xbe */, 0 /* 0xbf */,
+    0 /* 0xc0 */, 0 /* 0xc1 */, 0 /* 0xc2 */, 0 /* 0xc3 */,
+    0 /* 0xc4 */, 0 /* 0xc5 */, 0 /* 0xc6 */, 0 /* 0xc7 */,
+    0 /* 0xc8 */, 0 /* 0xc9 */, 0 /* 0xca */, 0 /* 0xcb */,
+    0 /* 0xcc */, 0 /* 0xcd */, 0 /* 0xce */, 0 /* 0xcf */,
+    0 /* 0xd0 */, 0 /* 0xd1 */, 0 /* 0xd2 */, 0 /* 0xd3 */,
+    0 /* 0xd4 */, 0 /* 0xd5 */, 0 /* 0xd6 */, 0 /* 0xd7 */,
+    0 /* 0xd8 */, 0 /* 0xd9 */, 0 /* 0xda */, 0 /* 0xdb */,
+    0 /* 0xdc */, 0 /* 0xdd */, 0 /* 0xde */, 0 /* 0xdf */,
+    0 /* 0xe0 */, 0 /* 0xe1 */, 0 /* 0xe2 */, 0 /* 0xe3 */,
+    0 /* 0xe4 */, 0 /* 0xe5 */, 0 /* 0xe6 */, 0 /* 0xe7 */,
+    0 /* 0xe8 */, 0 /* 0xe9 */, 0 /* 0xea */, 0 /* 0xeb */,
+    0 /* 0xec */, 0 /* 0xed */, 0 /* 0xee */, 0 /* 0xef */,
+    0 /* 0xf0 */, 0 /* 0xf1 */, 0 /* 0xf2 */, 0 /* 0xf3 */,
+    0 /* 0xf4 */, 0 /* 0xf5 */, 0 /* 0xf6 */, 0 /* 0xf7 */,
+    0 /* 0xf8 */, 0 /* 0xf9 */, 0 /* 0xfa */, 0 /* 0xfb */,
+    0 /* 0xfc */, 0 /* 0xfd */, 0 /* 0xfe */, 0 /* 0xff */
+};
+
+int nghttp2_check_header_name(const uint8_t *name, size_t len) {
+  const uint8_t *last;
+  if (len == 0) {
+    return 0;
+  }
+  if (*name == ':') {
+    if (len == 1) {
+      return 0;
+    }
+    ++name;
+    --len;
+  }
+  for (last = name + len; name != last; ++name) {
+    if (!VALID_HD_NAME_CHARS[*name]) {
+      return 0;
+    }
+  }
+  return 1;
+}
+
+/* Generated by genvchartbl.py */
+static const int VALID_HD_VALUE_CHARS[] = {
+    0 /* NUL  */, 0 /* SOH  */, 0 /* STX  */, 0 /* ETX  */,
+    0 /* EOT  */, 0 /* ENQ  */, 0 /* ACK  */, 0 /* BEL  */,
+    0 /* BS   */, 1 /* HT   */, 0 /* LF   */, 0 /* VT   */,
+    0 /* FF   */, 0 /* CR   */, 0 /* SO   */, 0 /* SI   */,
+    0 /* DLE  */, 0 /* DC1  */, 0 /* DC2  */, 0 /* DC3  */,
+    0 /* DC4  */, 0 /* NAK  */, 0 /* SYN  */, 0 /* ETB  */,
+    0 /* CAN  */, 0 /* EM   */, 0 /* SUB  */, 0 /* ESC  */,
+    0 /* FS   */, 0 /* GS   */, 0 /* RS   */, 0 /* US   */,
+    1 /* SPC  */, 1 /* !    */, 1 /* "    */, 1 /* #    */,
+    1 /* $    */, 1 /* %    */, 1 /* &    */, 1 /* '    */,
+    1 /* (    */, 1 /* )    */, 1 /* *    */, 1 /* +    */,
+    1 /* ,    */, 1 /* -    */, 1 /* .    */, 1 /* /    */,
+    1 /* 0    */, 1 /* 1    */, 1 /* 2    */, 1 /* 3    */,
+    1 /* 4    */, 1 /* 5    */, 1 /* 6    */, 1 /* 7    */,
+    1 /* 8    */, 1 /* 9    */, 1 /* :    */, 1 /* ;    */,
+    1 /* <    */, 1 /* =    */, 1 /* >    */, 1 /* ?    */,
+    1 /* @    */, 1 /* A    */, 1 /* B    */, 1 /* C    */,
+    1 /* D    */, 1 /* E    */, 1 /* F    */, 1 /* G    */,
+    1 /* H    */, 1 /* I    */, 1 /* J    */, 1 /* K    */,
+    1 /* L    */, 1 /* M    */, 1 /* N    */, 1 /* O    */,
+    1 /* P    */, 1 /* Q    */, 1 /* R    */, 1 /* S    */,
+    1 /* T    */, 1 /* U    */, 1 /* V    */, 1 /* W    */,
+    1 /* X    */, 1 /* Y    */, 1 /* Z    */, 1 /* [    */,
+    1 /* \    */, 1 /* ]    */, 1 /* ^    */, 1 /* _    */,
+    1 /* `    */, 1 /* a    */, 1 /* b    */, 1 /* c    */,
+    1 /* d    */, 1 /* e    */, 1 /* f    */, 1 /* g    */,
+    1 /* h    */, 1 /* i    */, 1 /* j    */, 1 /* k    */,
+    1 /* l    */, 1 /* m    */, 1 /* n    */, 1 /* o    */,
+    1 /* p    */, 1 /* q    */, 1 /* r    */, 1 /* s    */,
+    1 /* t    */, 1 /* u    */, 1 /* v    */, 1 /* w    */,
+    1 /* x    */, 1 /* y    */, 1 /* z    */, 1 /* {    */,
+    1 /* |    */, 1 /* }    */, 1 /* ~    */, 0 /* DEL  */,
+    1 /* 0x80 */, 1 /* 0x81 */, 1 /* 0x82 */, 1 /* 0x83 */,
+    1 /* 0x84 */, 1 /* 0x85 */, 1 /* 0x86 */, 1 /* 0x87 */,
+    1 /* 0x88 */, 1 /* 0x89 */, 1 /* 0x8a */, 1 /* 0x8b */,
+    1 /* 0x8c */, 1 /* 0x8d */, 1 /* 0x8e */, 1 /* 0x8f */,
+    1 /* 0x90 */, 1 /* 0x91 */, 1 /* 0x92 */, 1 /* 0x93 */,
+    1 /* 0x94 */, 1 /* 0x95 */, 1 /* 0x96 */, 1 /* 0x97 */,
+    1 /* 0x98 */, 1 /* 0x99 */, 1 /* 0x9a */, 1 /* 0x9b */,
+    1 /* 0x9c */, 1 /* 0x9d */, 1 /* 0x9e */, 1 /* 0x9f */,
+    1 /* 0xa0 */, 1 /* 0xa1 */, 1 /* 0xa2 */, 1 /* 0xa3 */,
+    1 /* 0xa4 */, 1 /* 0xa5 */, 1 /* 0xa6 */, 1 /* 0xa7 */,
+    1 /* 0xa8 */, 1 /* 0xa9 */, 1 /* 0xaa */, 1 /* 0xab */,
+    1 /* 0xac */, 1 /* 0xad */, 1 /* 0xae */, 1 /* 0xaf */,
+    1 /* 0xb0 */, 1 /* 0xb1 */, 1 /* 0xb2 */, 1 /* 0xb3 */,
+    1 /* 0xb4 */, 1 /* 0xb5 */, 1 /* 0xb6 */, 1 /* 0xb7 */,
+    1 /* 0xb8 */, 1 /* 0xb9 */, 1 /* 0xba */, 1 /* 0xbb */,
+    1 /* 0xbc */, 1 /* 0xbd */, 1 /* 0xbe */, 1 /* 0xbf */,
+    1 /* 0xc0 */, 1 /* 0xc1 */, 1 /* 0xc2 */, 1 /* 0xc3 */,
+    1 /* 0xc4 */, 1 /* 0xc5 */, 1 /* 0xc6 */, 1 /* 0xc7 */,
+    1 /* 0xc8 */, 1 /* 0xc9 */, 1 /* 0xca */, 1 /* 0xcb */,
+    1 /* 0xcc */, 1 /* 0xcd */, 1 /* 0xce */, 1 /* 0xcf */,
+    1 /* 0xd0 */, 1 /* 0xd1 */, 1 /* 0xd2 */, 1 /* 0xd3 */,
+    1 /* 0xd4 */, 1 /* 0xd5 */, 1 /* 0xd6 */, 1 /* 0xd7 */,
+    1 /* 0xd8 */, 1 /* 0xd9 */, 1 /* 0xda */, 1 /* 0xdb */,
+    1 /* 0xdc */, 1 /* 0xdd */, 1 /* 0xde */, 1 /* 0xdf */,
+    1 /* 0xe0 */, 1 /* 0xe1 */, 1 /* 0xe2 */, 1 /* 0xe3 */,
+    1 /* 0xe4 */, 1 /* 0xe5 */, 1 /* 0xe6 */, 1 /* 0xe7 */,
+    1 /* 0xe8 */, 1 /* 0xe9 */, 1 /* 0xea */, 1 /* 0xeb */,
+    1 /* 0xec */, 1 /* 0xed */, 1 /* 0xee */, 1 /* 0xef */,
+    1 /* 0xf0 */, 1 /* 0xf1 */, 1 /* 0xf2 */, 1 /* 0xf3 */,
+    1 /* 0xf4 */, 1 /* 0xf5 */, 1 /* 0xf6 */, 1 /* 0xf7 */,
+    1 /* 0xf8 */, 1 /* 0xf9 */, 1 /* 0xfa */, 1 /* 0xfb */,
+    1 /* 0xfc */, 1 /* 0xfd */, 1 /* 0xfe */, 1 /* 0xff */
+};
+
+int nghttp2_check_header_value(const uint8_t *value, size_t len) {
+  const uint8_t *last;
+  for (last = value + len; value != last; ++value) {
+    if (!VALID_HD_VALUE_CHARS[*value]) {
+      return 0;
+    }
+  }
+  return 1;
+}
+
+/* Generated by genauthroitychartbl.py */
+static char VALID_AUTHORITY_CHARS[] = {
+    0 /* NUL  */, 0 /* SOH  */, 0 /* STX  */, 0 /* ETX  */,
+    0 /* EOT  */, 0 /* ENQ  */, 0 /* ACK  */, 0 /* BEL  */,
+    0 /* BS   */, 0 /* HT   */, 0 /* LF   */, 0 /* VT   */,
+    0 /* FF   */, 0 /* CR   */, 0 /* SO   */, 0 /* SI   */,
+    0 /* DLE  */, 0 /* DC1  */, 0 /* DC2  */, 0 /* DC3  */,
+    0 /* DC4  */, 0 /* NAK  */, 0 /* SYN  */, 0 /* ETB  */,
+    0 /* CAN  */, 0 /* EM   */, 0 /* SUB  */, 0 /* ESC  */,
+    0 /* FS   */, 0 /* GS   */, 0 /* RS   */, 0 /* US   */,
+    0 /* SPC  */, 1 /* !    */, 0 /* "    */, 0 /* #    */,
+    1 /* $    */, 1 /* %    */, 1 /* &    */, 1 /* '    */,
+    1 /* (    */, 1 /* )    */, 1 /* *    */, 1 /* +    */,
+    1 /* ,    */, 1 /* -    */, 1 /* .    */, 0 /* /    */,
+    1 /* 0    */, 1 /* 1    */, 1 /* 2    */, 1 /* 3    */,
+    1 /* 4    */, 1 /* 5    */, 1 /* 6    */, 1 /* 7    */,
+    1 /* 8    */, 1 /* 9    */, 1 /* :    */, 1 /* ;    */,
+    0 /* <    */, 1 /* =    */, 0 /* >    */, 0 /* ?    */,
+    1 /* @    */, 1 /* A    */, 1 /* B    */, 1 /* C    */,
+    1 /* D    */, 1 /* E    */, 1 /* F    */, 1 /* G    */,
+    1 /* H    */, 1 /* I    */, 1 /* J    */, 1 /* K    */,
+    1 /* L    */, 1 /* M    */, 1 /* N    */, 1 /* O    */,
+    1 /* P    */, 1 /* Q    */, 1 /* R    */, 1 /* S    */,
+    1 /* T    */, 1 /* U    */, 1 /* V    */, 1 /* W    */,
+    1 /* X    */, 1 /* Y    */, 1 /* Z    */, 1 /* [    */,
+    0 /* \    */, 1 /* ]    */, 0 /* ^    */, 1 /* _    */,
+    0 /* `    */, 1 /* a    */, 1 /* b    */, 1 /* c    */,
+    1 /* d    */, 1 /* e    */, 1 /* f    */, 1 /* g    */,
+    1 /* h    */, 1 /* i    */, 1 /* j    */, 1 /* k    */,
+    1 /* l    */, 1 /* m    */, 1 /* n    */, 1 /* o    */,
+    1 /* p    */, 1 /* q    */, 1 /* r    */, 1 /* s    */,
+    1 /* t    */, 1 /* u    */, 1 /* v    */, 1 /* w    */,
+    1 /* x    */, 1 /* y    */, 1 /* z    */, 0 /* {    */,
+    0 /* |    */, 0 /* }    */, 1 /* ~    */, 0 /* DEL  */,
+    0 /* 0x80 */, 0 /* 0x81 */, 0 /* 0x82 */, 0 /* 0x83 */,
+    0 /* 0x84 */, 0 /* 0x85 */, 0 /* 0x86 */, 0 /* 0x87 */,
+    0 /* 0x88 */, 0 /* 0x89 */, 0 /* 0x8a */, 0 /* 0x8b */,
+    0 /* 0x8c */, 0 /* 0x8d */, 0 /* 0x8e */, 0 /* 0x8f */,
+    0 /* 0x90 */, 0 /* 0x91 */, 0 /* 0x92 */, 0 /* 0x93 */,
+    0 /* 0x94 */, 0 /* 0x95 */, 0 /* 0x96 */, 0 /* 0x97 */,
+    0 /* 0x98 */, 0 /* 0x99 */, 0 /* 0x9a */, 0 /* 0x9b */,
+    0 /* 0x9c */, 0 /* 0x9d */, 0 /* 0x9e */, 0 /* 0x9f */,
+    0 /* 0xa0 */, 0 /* 0xa1 */, 0 /* 0xa2 */, 0 /* 0xa3 */,
+    0 /* 0xa4 */, 0 /* 0xa5 */, 0 /* 0xa6 */, 0 /* 0xa7 */,
+    0 /* 0xa8 */, 0 /* 0xa9 */, 0 /* 0xaa */, 0 /* 0xab */,
+    0 /* 0xac */, 0 /* 0xad */, 0 /* 0xae */, 0 /* 0xaf */,
+    0 /* 0xb0 */, 0 /* 0xb1 */, 0 /* 0xb2 */, 0 /* 0xb3 */,
+    0 /* 0xb4 */, 0 /* 0xb5 */, 0 /* 0xb6 */, 0 /* 0xb7 */,
+    0 /* 0xb8 */, 0 /* 0xb9 */, 0 /* 0xba */, 0 /* 0xbb */,
+    0 /* 0xbc */, 0 /* 0xbd */, 0 /* 0xbe */, 0 /* 0xbf */,
+    0 /* 0xc0 */, 0 /* 0xc1 */, 0 /* 0xc2 */, 0 /* 0xc3 */,
+    0 /* 0xc4 */, 0 /* 0xc5 */, 0 /* 0xc6 */, 0 /* 0xc7 */,
+    0 /* 0xc8 */, 0 /* 0xc9 */, 0 /* 0xca */, 0 /* 0xcb */,
+    0 /* 0xcc */, 0 /* 0xcd */, 0 /* 0xce */, 0 /* 0xcf */,
+    0 /* 0xd0 */, 0 /* 0xd1 */, 0 /* 0xd2 */, 0 /* 0xd3 */,
+    0 /* 0xd4 */, 0 /* 0xd5 */, 0 /* 0xd6 */, 0 /* 0xd7 */,
+    0 /* 0xd8 */, 0 /* 0xd9 */, 0 /* 0xda */, 0 /* 0xdb */,
+    0 /* 0xdc */, 0 /* 0xdd */, 0 /* 0xde */, 0 /* 0xdf */,
+    0 /* 0xe0 */, 0 /* 0xe1 */, 0 /* 0xe2 */, 0 /* 0xe3 */,
+    0 /* 0xe4 */, 0 /* 0xe5 */, 0 /* 0xe6 */, 0 /* 0xe7 */,
+    0 /* 0xe8 */, 0 /* 0xe9 */, 0 /* 0xea */, 0 /* 0xeb */,
+    0 /* 0xec */, 0 /* 0xed */, 0 /* 0xee */, 0 /* 0xef */,
+    0 /* 0xf0 */, 0 /* 0xf1 */, 0 /* 0xf2 */, 0 /* 0xf3 */,
+    0 /* 0xf4 */, 0 /* 0xf5 */, 0 /* 0xf6 */, 0 /* 0xf7 */,
+    0 /* 0xf8 */, 0 /* 0xf9 */, 0 /* 0xfa */, 0 /* 0xfb */,
+    0 /* 0xfc */, 0 /* 0xfd */, 0 /* 0xfe */, 0 /* 0xff */
+};
+
+int nghttp2_check_authority(const uint8_t *value, size_t len) {
+  const uint8_t *last;
+  for (last = value + len; value != last; ++value) {
+    if (!VALID_AUTHORITY_CHARS[*value]) {
+      return 0;
+    }
+  }
+  return 1;
+}
+
+uint8_t *nghttp2_cpymem(uint8_t *dest, const void *src, size_t len) {
+  if (len == 0) {
+    return dest;
+  }
+
+  memcpy(dest, src, len);
+
+  return dest + len;
+}
+
+const char *nghttp2_http2_strerror(uint32_t error_code) {
+  switch (error_code) {
+  case NGHTTP2_NO_ERROR:
+    return "NO_ERROR";
+  case NGHTTP2_PROTOCOL_ERROR:
+    return "PROTOCOL_ERROR";
+  case NGHTTP2_INTERNAL_ERROR:
+    return "INTERNAL_ERROR";
+  case NGHTTP2_FLOW_CONTROL_ERROR:
+    return "FLOW_CONTROL_ERROR";
+  case NGHTTP2_SETTINGS_TIMEOUT:
+    return "SETTINGS_TIMEOUT";
+  case NGHTTP2_STREAM_CLOSED:
+    return "STREAM_CLOSED";
+  case NGHTTP2_FRAME_SIZE_ERROR:
+    return "FRAME_SIZE_ERROR";
+  case NGHTTP2_REFUSED_STREAM:
+    return "REFUSED_STREAM";
+  case NGHTTP2_CANCEL:
+    return "CANCEL";
+  case NGHTTP2_COMPRESSION_ERROR:
+    return "COMPRESSION_ERROR";
+  case NGHTTP2_CONNECT_ERROR:
+    return "CONNECT_ERROR";
+  case NGHTTP2_ENHANCE_YOUR_CALM:
+    return "ENHANCE_YOUR_CALM";
+  case NGHTTP2_INADEQUATE_SECURITY:
+    return "INADEQUATE_SECURITY";
+  case NGHTTP2_HTTP_1_1_REQUIRED:
+    return "HTTP_1_1_REQUIRED";
+  default:
+    return "unknown";
+  }
+}

lib/nghttp2_helper.h

@@ -0,0 +1,122 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_HELPER_H
+#define NGHTTP2_HELPER_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <string.h>
+#include <stddef.h>
+
+#include <nghttp2/nghttp2.h>
+#include "nghttp2_mem.h"
+
+#define nghttp2_min(A, B) ((A) < (B) ? (A) : (B))
+#define nghttp2_max(A, B) ((A) > (B) ? (A) : (B))
+
+#define lstreq(A, B, N) ((sizeof((A)) - 1) == (N) && memcmp((A), (B), (N)) == 0)
+
+#define nghttp2_struct_of(ptr, type, member)                                   \
+  ((type *)(void *)((char *)(ptr)-offsetof(type, member)))
+
+/*
+ * Copies 2 byte unsigned integer |n| in host byte order to |buf| in
+ * network byte order.
+ */
+void nghttp2_put_uint16be(uint8_t *buf, uint16_t n);
+
+/*
+ * Copies 4 byte unsigned integer |n| in host byte order to |buf| in
+ * network byte order.
+ */
+void nghttp2_put_uint32be(uint8_t *buf, uint32_t n);
+
+/*
+ * Retrieves 2 byte unsigned integer stored in |data| in network byte
+ * order and returns it in host byte order.
+ */
+uint16_t nghttp2_get_uint16(const uint8_t *data);
+
+/*
+ * Retrieves 4 byte unsigned integer stored in |data| in network byte
+ * order and returns it in host byte order.
+ */
+uint32_t nghttp2_get_uint32(const uint8_t *data);
+
+void nghttp2_downcase(uint8_t *s, size_t len);
+
+/*
+ * Adjusts |*local_window_size_ptr|, |*recv_window_size_ptr|,
+ * |*recv_reduction_ptr| with |*delta_ptr| which is the
+ * WINDOW_UPDATE's window_size_increment sent from local side. If
+ * |delta| is strictly larger than |*recv_window_size_ptr|,
+ * |*local_window_size_ptr| is increased by delta -
+ * *recv_window_size_ptr. If |delta| is negative,
+ * |*local_window_size_ptr| is decreased by delta.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_FLOW_CONTROL
+ *     local_window_size overflow or gets negative.
+ */
+int nghttp2_adjust_local_window_size(int32_t *local_window_size_ptr,
+                                     int32_t *recv_window_size_ptr,
+                                     int32_t *recv_reduction_ptr,
+                                     int32_t *delta_ptr);
+
+/*
+ * This function works like nghttp2_adjust_local_window_size().  The
+ * difference is that this function assumes *delta_ptr >= 0, and
+ * *recv_window_size_ptr is not decreased by *delta_ptr.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_FLOW_CONTROL
+ *     local_window_size overflow or gets negative.
+ */
+int nghttp2_increase_local_window_size(int32_t *local_window_size_ptr,
+                                       int32_t *recv_window_size_ptr,
+                                       int32_t *recv_reduction_ptr,
+                                       int32_t *delta_ptr);
+
+/*
+ * Returns non-zero if the function decided that WINDOW_UPDATE should
+ * be sent.
+ */
+int nghttp2_should_send_window_update(int32_t local_window_size,
+                                      int32_t recv_window_size);
+
+/*
+ * Copies the buffer |src| of length |len| to the destination pointed
+ * by the |dest|, assuming that the |dest| is at lest |len| bytes long
+ * . Returns dest + len.
+ */
+uint8_t *nghttp2_cpymem(uint8_t *dest, const void *src, size_t len);
+
+#endif /* NGHTTP2_HELPER_H */

lib/nghttp2_http.c

@@ -0,0 +1,530 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2015 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_http.h"
+
+#include <string.h>
+#include <assert.h>
+#include <stdio.h>
+
+#include "nghttp2_hd.h"
+#include "nghttp2_helper.h"
+
+static uint8_t downcase(uint8_t c) {
+  return 'A' <= c && c <= 'Z' ? (uint8_t)(c - 'A' + 'a') : c;
+}
+
+static int memieq(const void *a, const void *b, size_t n) {
+  size_t i;
+  const uint8_t *aa = a, *bb = b;
+
+  for (i = 0; i < n; ++i) {
+    if (downcase(aa[i]) != downcase(bb[i])) {
+      return 0;
+    }
+  }
+  return 1;
+}
+
+#define lstrieq(A, B, N) ((sizeof((A)) - 1) == (N) && memieq((A), (B), (N)))
+
+static int64_t parse_uint(const uint8_t *s, size_t len) {
+  int64_t n = 0;
+  size_t i;
+  if (len == 0) {
+    return -1;
+  }
+  for (i = 0; i < len; ++i) {
+    if ('0' <= s[i] && s[i] <= '9') {
+      if (n > INT64_MAX / 10) {
+        return -1;
+      }
+      n *= 10;
+      if (n > INT64_MAX - (s[i] - '0')) {
+        return -1;
+      }
+      n += s[i] - '0';
+      continue;
+    }
+    return -1;
+  }
+  return n;
+}
+
+static int lws(const uint8_t *s, size_t n) {
+  size_t i;
+  for (i = 0; i < n; ++i) {
+    if (s[i] != ' ' && s[i] != '\t') {
+      return 0;
+    }
+  }
+  return 1;
+}
+
+static int check_pseudo_header(nghttp2_stream *stream, const nghttp2_hd_nv *nv,
+                               int flag) {
+  if (stream->http_flags & flag) {
+    return 0;
+  }
+  if (lws(nv->value->base, nv->value->len)) {
+    return 0;
+  }
+  stream->http_flags = (uint16_t)(stream->http_flags | flag);
+  return 1;
+}
+
+static int expect_response_body(nghttp2_stream *stream) {
+  return (stream->http_flags & NGHTTP2_HTTP_FLAG_METH_HEAD) == 0 &&
+         stream->status_code / 100 != 1 && stream->status_code != 304 &&
+         stream->status_code != 204;
+}
+
+/* For "http" or "https" URIs, OPTIONS request may have "*" in :path
+   header field to represent system-wide OPTIONS request.  Otherwise,
+   :path header field value must start with "/".  This function must
+   be called after ":method" header field was received.  This function
+   returns nonzero if path is valid.*/
+static int check_path(nghttp2_stream *stream) {
+  return (stream->http_flags & NGHTTP2_HTTP_FLAG_SCHEME_HTTP) == 0 ||
+         ((stream->http_flags & NGHTTP2_HTTP_FLAG_PATH_REGULAR) ||
+          ((stream->http_flags & NGHTTP2_HTTP_FLAG_METH_OPTIONS) &&
+           (stream->http_flags & NGHTTP2_HTTP_FLAG_PATH_ASTERISK)));
+}
+
+static int http_request_on_header(nghttp2_stream *stream, nghttp2_hd_nv *nv,
+                                  int trailer, int connect_protocol) {
+  if (nv->name->base[0] == ':') {
+    if (trailer ||
+        (stream->http_flags & NGHTTP2_HTTP_FLAG_PSEUDO_HEADER_DISALLOWED)) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+  }
+
+  switch (nv->token) {
+  case NGHTTP2_TOKEN__AUTHORITY:
+    if (!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__AUTHORITY)) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    break;
+  case NGHTTP2_TOKEN__METHOD:
+    if (!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__METHOD)) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    switch (nv->value->len) {
+    case 4:
+      if (lstreq("HEAD", nv->value->base, nv->value->len)) {
+        stream->http_flags |= NGHTTP2_HTTP_FLAG_METH_HEAD;
+      }
+      break;
+    case 7:
+      switch (nv->value->base[6]) {
+      case 'T':
+        if (lstreq("CONNECT", nv->value->base, nv->value->len)) {
+          if (stream->stream_id % 2 == 0) {
+            /* we won't allow CONNECT for push */
+            return NGHTTP2_ERR_HTTP_HEADER;
+          }
+          stream->http_flags |= NGHTTP2_HTTP_FLAG_METH_CONNECT;
+        }
+        break;
+      case 'S':
+        if (lstreq("OPTIONS", nv->value->base, nv->value->len)) {
+          stream->http_flags |= NGHTTP2_HTTP_FLAG_METH_OPTIONS;
+        }
+        break;
+      }
+      break;
+    }
+    break;
+  case NGHTTP2_TOKEN__PATH:
+    if (!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__PATH)) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    if (nv->value->base[0] == '/') {
+      stream->http_flags |= NGHTTP2_HTTP_FLAG_PATH_REGULAR;
+    } else if (nv->value->len == 1 && nv->value->base[0] == '*') {
+      stream->http_flags |= NGHTTP2_HTTP_FLAG_PATH_ASTERISK;
+    }
+    break;
+  case NGHTTP2_TOKEN__SCHEME:
+    if (!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__SCHEME)) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    if ((nv->value->len == 4 && memieq("http", nv->value->base, 4)) ||
+        (nv->value->len == 5 && memieq("https", nv->value->base, 5))) {
+      stream->http_flags |= NGHTTP2_HTTP_FLAG_SCHEME_HTTP;
+    }
+    break;
+  case NGHTTP2_TOKEN__PROTOCOL:
+    if (!connect_protocol) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+
+    if (!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__PROTOCOL)) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    break;
+  case NGHTTP2_TOKEN_HOST:
+    if (!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG_HOST)) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    break;
+  case NGHTTP2_TOKEN_CONTENT_LENGTH: {
+    if (stream->content_length != -1) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    stream->content_length = parse_uint(nv->value->base, nv->value->len);
+    if (stream->content_length == -1) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    break;
+  }
+  /* disallowed header fields */
+  case NGHTTP2_TOKEN_CONNECTION:
+  case NGHTTP2_TOKEN_KEEP_ALIVE:
+  case NGHTTP2_TOKEN_PROXY_CONNECTION:
+  case NGHTTP2_TOKEN_TRANSFER_ENCODING:
+  case NGHTTP2_TOKEN_UPGRADE:
+    return NGHTTP2_ERR_HTTP_HEADER;
+  case NGHTTP2_TOKEN_TE:
+    if (!lstrieq("trailers", nv->value->base, nv->value->len)) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    break;
+  default:
+    if (nv->name->base[0] == ':') {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+  }
+
+  if (nv->name->base[0] != ':') {
+    stream->http_flags |= NGHTTP2_HTTP_FLAG_PSEUDO_HEADER_DISALLOWED;
+  }
+
+  return 0;
+}
+
+static int http_response_on_header(nghttp2_stream *stream, nghttp2_hd_nv *nv,
+                                   int trailer) {
+  if (nv->name->base[0] == ':') {
+    if (trailer ||
+        (stream->http_flags & NGHTTP2_HTTP_FLAG_PSEUDO_HEADER_DISALLOWED)) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+  }
+
+  switch (nv->token) {
+  case NGHTTP2_TOKEN__STATUS: {
+    if (!check_pseudo_header(stream, nv, NGHTTP2_HTTP_FLAG__STATUS)) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    if (nv->value->len != 3) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    stream->status_code = (int16_t)parse_uint(nv->value->base, nv->value->len);
+    if (stream->status_code == -1 || stream->status_code == 101) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    break;
+  }
+  case NGHTTP2_TOKEN_CONTENT_LENGTH: {
+    if (stream->status_code == 204) {
+      /* content-length header field in 204 response is prohibited by
+         RFC 7230.  But some widely used servers send content-length:
+         0.  Until they get fixed, we ignore it. */
+      if (stream->content_length != -1) {
+        /* Found multiple content-length field */
+        return NGHTTP2_ERR_HTTP_HEADER;
+      }
+      if (!lstrieq("0", nv->value->base, nv->value->len)) {
+        return NGHTTP2_ERR_HTTP_HEADER;
+      }
+      stream->content_length = 0;
+      return NGHTTP2_ERR_REMOVE_HTTP_HEADER;
+    }
+    if (stream->status_code / 100 == 1) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    /* https://tools.ietf.org/html/rfc7230#section-3.3.3 */
+    if (stream->status_code / 100 == 2 &&
+        (stream->http_flags & NGHTTP2_HTTP_FLAG_METH_CONNECT)) {
+      return NGHTTP2_ERR_REMOVE_HTTP_HEADER;
+    }
+    if (stream->content_length != -1) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    stream->content_length = parse_uint(nv->value->base, nv->value->len);
+    if (stream->content_length == -1) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    break;
+  }
+  /* disallowed header fields */
+  case NGHTTP2_TOKEN_CONNECTION:
+  case NGHTTP2_TOKEN_KEEP_ALIVE:
+  case NGHTTP2_TOKEN_PROXY_CONNECTION:
+  case NGHTTP2_TOKEN_TRANSFER_ENCODING:
+  case NGHTTP2_TOKEN_UPGRADE:
+    return NGHTTP2_ERR_HTTP_HEADER;
+  case NGHTTP2_TOKEN_TE:
+    if (!lstrieq("trailers", nv->value->base, nv->value->len)) {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    break;
+  default:
+    if (nv->name->base[0] == ':') {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+  }
+
+  if (nv->name->base[0] != ':') {
+    stream->http_flags |= NGHTTP2_HTTP_FLAG_PSEUDO_HEADER_DISALLOWED;
+  }
+
+  return 0;
+}
+
+static int check_scheme(const uint8_t *value, size_t len) {
+  const uint8_t *last;
+  if (len == 0) {
+    return 0;
+  }
+
+  if (!(('A' <= *value && *value <= 'Z') || ('a' <= *value && *value <= 'z'))) {
+    return 0;
+  }
+
+  last = value + len;
+  ++value;
+
+  for (; value != last; ++value) {
+    if (!(('A' <= *value && *value <= 'Z') ||
+          ('a' <= *value && *value <= 'z') ||
+          ('0' <= *value && *value <= '9') || *value == '+' || *value == '-' ||
+          *value == '.')) {
+      return 0;
+    }
+  }
+  return 1;
+}
+
+int nghttp2_http_on_header(nghttp2_session *session, nghttp2_stream *stream,
+                           nghttp2_frame *frame, nghttp2_hd_nv *nv,
+                           int trailer) {
+  int rv;
+
+  /* We are strict for pseudo header field.  One bad character should
+     lead to fail.  OTOH, we should be a bit forgiving for regular
+     headers, since existing public internet has so much illegal
+     headers floating around and if we kill the stream because of
+     this, we may disrupt many web sites and/or libraries.  So we
+     become conservative here, and just ignore those illegal regular
+     headers. */
+  if (!nghttp2_check_header_name(nv->name->base, nv->name->len)) {
+    size_t i;
+    if (nv->name->len > 0 && nv->name->base[0] == ':') {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    /* header field name must be lower-cased without exception */
+    for (i = 0; i < nv->name->len; ++i) {
+      uint8_t c = nv->name->base[i];
+      if ('A' <= c && c <= 'Z') {
+        return NGHTTP2_ERR_HTTP_HEADER;
+      }
+    }
+    /* When ignoring regular headers, we set this flag so that we
+       still enforce header field ordering rule for pseudo header
+       fields. */
+    stream->http_flags |= NGHTTP2_HTTP_FLAG_PSEUDO_HEADER_DISALLOWED;
+    return NGHTTP2_ERR_IGN_HTTP_HEADER;
+  }
+
+  if (nv->token == NGHTTP2_TOKEN__AUTHORITY ||
+      nv->token == NGHTTP2_TOKEN_HOST) {
+    rv = nghttp2_check_authority(nv->value->base, nv->value->len);
+  } else if (nv->token == NGHTTP2_TOKEN__SCHEME) {
+    rv = check_scheme(nv->value->base, nv->value->len);
+  } else {
+    rv = nghttp2_check_header_value(nv->value->base, nv->value->len);
+  }
+
+  if (rv == 0) {
+    assert(nv->name->len > 0);
+    if (nv->name->base[0] == ':') {
+      return NGHTTP2_ERR_HTTP_HEADER;
+    }
+    /* When ignoring regular headers, we set this flag so that we
+       still enforce header field ordering rule for pseudo header
+       fields. */
+    stream->http_flags |= NGHTTP2_HTTP_FLAG_PSEUDO_HEADER_DISALLOWED;
+    return NGHTTP2_ERR_IGN_HTTP_HEADER;
+  }
+
+  if (session->server || frame->hd.type == NGHTTP2_PUSH_PROMISE) {
+    return http_request_on_header(stream, nv, trailer,
+                                  session->server &&
+                                      session->pending_enable_connect_protocol);
+  }
+
+  return http_response_on_header(stream, nv, trailer);
+}
+
+int nghttp2_http_on_request_headers(nghttp2_stream *stream,
+                                    nghttp2_frame *frame) {
+  if (!(stream->http_flags & NGHTTP2_HTTP_FLAG__PROTOCOL) &&
+      (stream->http_flags & NGHTTP2_HTTP_FLAG_METH_CONNECT)) {
+    if ((stream->http_flags &
+         (NGHTTP2_HTTP_FLAG__SCHEME | NGHTTP2_HTTP_FLAG__PATH)) ||
+        (stream->http_flags & NGHTTP2_HTTP_FLAG__AUTHORITY) == 0) {
+      return -1;
+    }
+    stream->content_length = -1;
+  } else {
+    if ((stream->http_flags & NGHTTP2_HTTP_FLAG_REQ_HEADERS) !=
+            NGHTTP2_HTTP_FLAG_REQ_HEADERS ||
+        (stream->http_flags &
+         (NGHTTP2_HTTP_FLAG__AUTHORITY | NGHTTP2_HTTP_FLAG_HOST)) == 0) {
+      return -1;
+    }
+    if ((stream->http_flags & NGHTTP2_HTTP_FLAG__PROTOCOL) &&
+        ((stream->http_flags & NGHTTP2_HTTP_FLAG_METH_CONNECT) == 0 ||
+         (stream->http_flags & NGHTTP2_HTTP_FLAG__AUTHORITY) == 0)) {
+      return -1;
+    }
+    if (!check_path(stream)) {
+      return -1;
+    }
+  }
+
+  if (frame->hd.type == NGHTTP2_PUSH_PROMISE) {
+    /* we are going to reuse data fields for upcoming response.  Clear
+       them now, except for method flags. */
+    stream->http_flags &= NGHTTP2_HTTP_FLAG_METH_ALL;
+    stream->content_length = -1;
+  }
+
+  return 0;
+}
+
+int nghttp2_http_on_response_headers(nghttp2_stream *stream) {
+  if ((stream->http_flags & NGHTTP2_HTTP_FLAG__STATUS) == 0) {
+    return -1;
+  }
+
+  if (stream->status_code / 100 == 1) {
+    /* non-final response */
+    stream->http_flags =
+        (uint16_t)((stream->http_flags & NGHTTP2_HTTP_FLAG_METH_ALL) |
+                   NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE);
+    stream->content_length = -1;
+    stream->status_code = -1;
+    return 0;
+  }
+
+  stream->http_flags =
+      (uint16_t)(stream->http_flags & ~NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE);
+
+  if (!expect_response_body(stream)) {
+    stream->content_length = 0;
+  } else if (stream->http_flags & (NGHTTP2_HTTP_FLAG_METH_CONNECT |
+                                   NGHTTP2_HTTP_FLAG_METH_UPGRADE_WORKAROUND)) {
+    stream->content_length = -1;
+  }
+
+  return 0;
+}
+
+int nghttp2_http_on_trailer_headers(nghttp2_stream *stream,
+                                    nghttp2_frame *frame) {
+  (void)stream;
+
+  if ((frame->hd.flags & NGHTTP2_FLAG_END_STREAM) == 0) {
+    return -1;
+  }
+
+  return 0;
+}
+
+int nghttp2_http_on_remote_end_stream(nghttp2_stream *stream) {
+  if (stream->http_flags & NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE) {
+    return -1;
+  }
+
+  if (stream->content_length != -1 &&
+      stream->content_length != stream->recv_content_length) {
+    return -1;
+  }
+
+  return 0;
+}
+
+int nghttp2_http_on_data_chunk(nghttp2_stream *stream, size_t n) {
+  stream->recv_content_length += (int64_t)n;
+
+  if ((stream->http_flags & NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE) ||
+      (stream->content_length != -1 &&
+       stream->recv_content_length > stream->content_length)) {
+    return -1;
+  }
+
+  return 0;
+}
+
+void nghttp2_http_record_request_method(nghttp2_stream *stream,
+                                        nghttp2_frame *frame) {
+  const nghttp2_nv *nva;
+  size_t nvlen;
+  size_t i;
+
+  switch (frame->hd.type) {
+  case NGHTTP2_HEADERS:
+    nva = frame->headers.nva;
+    nvlen = frame->headers.nvlen;
+    break;
+  case NGHTTP2_PUSH_PROMISE:
+    nva = frame->push_promise.nva;
+    nvlen = frame->push_promise.nvlen;
+    break;
+  default:
+    return;
+  }
+
+  /* TODO we should do this strictly. */
+  for (i = 0; i < nvlen; ++i) {
+    const nghttp2_nv *nv = &nva[i];
+    if (!(nv->namelen == 7 && nv->name[6] == 'd' &&
+          memcmp(":metho", nv->name, nv->namelen - 1) == 0)) {
+      continue;
+    }
+    if (lstreq("CONNECT", nv->value, nv->valuelen)) {
+      stream->http_flags |= NGHTTP2_HTTP_FLAG_METH_CONNECT;
+      return;
+    }
+    if (lstreq("HEAD", nv->value, nv->valuelen)) {
+      stream->http_flags |= NGHTTP2_HTTP_FLAG_METH_HEAD;
+      return;
+    }
+    return;
+  }
+}

lib/nghttp2_http.h

@@ -0,0 +1,97 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2015 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_HTTP_H
+#define NGHTTP2_HTTP_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+#include "nghttp2_session.h"
+#include "nghttp2_stream.h"
+
+/*
+ * This function is called when HTTP header field |nv| in |frame| is
+ * received for |stream|.  This function will validate |nv| against
+ * the current state of stream.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_HTTP_HEADER
+ *     Invalid HTTP header field was received.
+ * NGHTTP2_ERR_IGN_HTTP_HEADER
+ *     Invalid HTTP header field was received but it can be treated as
+ *     if it was not received because of compatibility reasons.
+ */
+int nghttp2_http_on_header(nghttp2_session *session, nghttp2_stream *stream,
+                           nghttp2_frame *frame, nghttp2_hd_nv *nv,
+                           int trailer);
+
+/*
+ * This function is called when request header is received.  This
+ * function performs validation and returns 0 if it succeeds, or -1.
+ */
+int nghttp2_http_on_request_headers(nghttp2_stream *stream,
+                                    nghttp2_frame *frame);
+
+/*
+ * This function is called when response header is received.  This
+ * function performs validation and returns 0 if it succeeds, or -1.
+ */
+int nghttp2_http_on_response_headers(nghttp2_stream *stream);
+
+/*
+ * This function is called trailer header (for both request and
+ * response) is received.  This function performs validation and
+ * returns 0 if it succeeds, or -1.
+ */
+int nghttp2_http_on_trailer_headers(nghttp2_stream *stream,
+                                    nghttp2_frame *frame);
+
+/*
+ * This function is called when END_STREAM flag is seen in incoming
+ * frame.  This function performs validation and returns 0 if it
+ * succeeds, or -1.
+ */
+int nghttp2_http_on_remote_end_stream(nghttp2_stream *stream);
+
+/*
+ * This function is called when chunk of data is received.  This
+ * function performs validation and returns 0 if it succeeds, or -1.
+ */
+int nghttp2_http_on_data_chunk(nghttp2_stream *stream, size_t n);
+
+/*
+ * This function inspects header field in |frame| and records its
+ * method in stream->http_flags.  If frame->hd.type is neither
+ * NGHTTP2_HEADERS nor NGHTTP2_PUSH_PROMISE, this function does
+ * nothing.
+ */
+void nghttp2_http_record_request_method(nghttp2_stream *stream,
+                                        nghttp2_frame *frame);
+
+#endif /* NGHTTP2_HTTP_H */

lib/nghttp2_int.h

@@ -0,0 +1,58 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_INT_H
+#define NGHTTP2_INT_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+
+/* Macros, types and constants for internal use */
+
+/* "less" function, return nonzero if |lhs| is less than |rhs|. */
+typedef int (*nghttp2_less)(const void *lhs, const void *rhs);
+
+/* Internal error code. They must be in the range [-499, -100],
+   inclusive. */
+typedef enum {
+  NGHTTP2_ERR_CREDENTIAL_PENDING = -101,
+  NGHTTP2_ERR_IGN_HEADER_BLOCK = -103,
+  NGHTTP2_ERR_IGN_PAYLOAD = -104,
+  /*
+   * Invalid HTTP header field was received but it can be treated as
+   * if it was not received because of compatibility reasons.
+   */
+  NGHTTP2_ERR_IGN_HTTP_HEADER = -105,
+  /*
+   * Invalid HTTP header field was received, and it is ignored.
+   * Unlike NGHTTP2_ERR_IGN_HTTP_HEADER, this does not invoke
+   * nghttp2_on_invalid_header_callback.
+   */
+  NGHTTP2_ERR_REMOVE_HTTP_HEADER = -106
+} nghttp2_internal_error;
+
+#endif /* NGHTTP2_INT_H */

lib/nghttp2_map.c

@@ -0,0 +1,189 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_map.h"
+
+#include <string.h>
+
+#define INITIAL_TABLE_LENGTH 256
+
+int nghttp2_map_init(nghttp2_map *map, nghttp2_mem *mem) {
+  map->mem = mem;
+  map->tablelen = INITIAL_TABLE_LENGTH;
+  map->table =
+      nghttp2_mem_calloc(mem, map->tablelen, sizeof(nghttp2_map_entry *));
+  if (map->table == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  map->size = 0;
+
+  return 0;
+}
+
+void nghttp2_map_free(nghttp2_map *map) {
+  nghttp2_mem_free(map->mem, map->table);
+}
+
+void nghttp2_map_each_free(nghttp2_map *map,
+                           int (*func)(nghttp2_map_entry *entry, void *ptr),
+                           void *ptr) {
+  uint32_t i;
+  for (i = 0; i < map->tablelen; ++i) {
+    nghttp2_map_entry *entry;
+    for (entry = map->table[i]; entry;) {
+      nghttp2_map_entry *next = entry->next;
+      func(entry, ptr);
+      entry = next;
+    }
+    map->table[i] = NULL;
+  }
+}
+
+int nghttp2_map_each(nghttp2_map *map,
+                     int (*func)(nghttp2_map_entry *entry, void *ptr),
+                     void *ptr) {
+  int rv;
+  uint32_t i;
+  for (i = 0; i < map->tablelen; ++i) {
+    nghttp2_map_entry *entry;
+    for (entry = map->table[i]; entry; entry = entry->next) {
+      rv = func(entry, ptr);
+      if (rv != 0) {
+        return rv;
+      }
+    }
+  }
+  return 0;
+}
+
+void nghttp2_map_entry_init(nghttp2_map_entry *entry, key_type key) {
+  entry->key = key;
+  entry->next = NULL;
+}
+
+/* Same hash function in android HashMap source code. */
+/* The |mod| must be power of 2 */
+static uint32_t hash(int32_t key, uint32_t mod) {
+  uint32_t h = (uint32_t)key;
+  h ^= (h >> 20) ^ (h >> 12);
+  h ^= (h >> 7) ^ (h >> 4);
+  return h & (mod - 1);
+}
+
+static int insert(nghttp2_map_entry **table, uint32_t tablelen,
+                  nghttp2_map_entry *entry) {
+  uint32_t h = hash(entry->key, tablelen);
+  if (table[h] == NULL) {
+    table[h] = entry;
+  } else {
+    nghttp2_map_entry *p;
+    /* We won't allow duplicated key, so check it out. */
+    for (p = table[h]; p; p = p->next) {
+      if (p->key == entry->key) {
+        return NGHTTP2_ERR_INVALID_ARGUMENT;
+      }
+    }
+    entry->next = table[h];
+    table[h] = entry;
+  }
+  return 0;
+}
+
+/* new_tablelen must be power of 2 */
+static int resize(nghttp2_map *map, uint32_t new_tablelen) {
+  uint32_t i;
+  nghttp2_map_entry **new_table;
+
+  new_table =
+      nghttp2_mem_calloc(map->mem, new_tablelen, sizeof(nghttp2_map_entry *));
+  if (new_table == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  for (i = 0; i < map->tablelen; ++i) {
+    nghttp2_map_entry *entry;
+    for (entry = map->table[i]; entry;) {
+      nghttp2_map_entry *next = entry->next;
+      entry->next = NULL;
+      /* This function must succeed */
+      insert(new_table, new_tablelen, entry);
+      entry = next;
+    }
+  }
+  nghttp2_mem_free(map->mem, map->table);
+  map->tablelen = new_tablelen;
+  map->table = new_table;
+
+  return 0;
+}
+
+int nghttp2_map_insert(nghttp2_map *map, nghttp2_map_entry *new_entry) {
+  int rv;
+  /* Load factor is 0.75 */
+  if ((map->size + 1) * 4 > map->tablelen * 3) {
+    rv = resize(map, map->tablelen * 2);
+    if (rv != 0) {
+      return rv;
+    }
+  }
+  rv = insert(map->table, map->tablelen, new_entry);
+  if (rv != 0) {
+    return rv;
+  }
+  ++map->size;
+  return 0;
+}
+
+nghttp2_map_entry *nghttp2_map_find(nghttp2_map *map, key_type key) {
+  uint32_t h;
+  nghttp2_map_entry *entry;
+  h = hash(key, map->tablelen);
+  for (entry = map->table[h]; entry; entry = entry->next) {
+    if (entry->key == key) {
+      return entry;
+    }
+  }
+  return NULL;
+}
+
+int nghttp2_map_remove(nghttp2_map *map, key_type key) {
+  uint32_t h;
+  nghttp2_map_entry **dst;
+
+  h = hash(key, map->tablelen);
+
+  for (dst = &map->table[h]; *dst; dst = &(*dst)->next) {
+    if ((*dst)->key != key) {
+      continue;
+    }
+
+    *dst = (*dst)->next;
+    --map->size;
+    return 0;
+  }
+  return NGHTTP2_ERR_INVALID_ARGUMENT;
+}
+
+size_t nghttp2_map_size(nghttp2_map *map) { return map->size; }

lib/nghttp2_map.h

@@ -0,0 +1,144 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_MAP_H
+#define NGHTTP2_MAP_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+#include "nghttp2_int.h"
+#include "nghttp2_mem.h"
+
+/* Implementation of unordered map */
+
+typedef int32_t key_type;
+
+typedef struct nghttp2_map_entry {
+  struct nghttp2_map_entry *next;
+  key_type key;
+#if SIZEOF_INT_P == 4
+  /* we requires 8 bytes aligment */
+  int64_t pad;
+#endif
+} nghttp2_map_entry;
+
+typedef struct {
+  nghttp2_map_entry **table;
+  nghttp2_mem *mem;
+  size_t size;
+  uint32_t tablelen;
+} nghttp2_map;
+
+/*
+ * Initializes the map |map|.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *   Out of memory
+ */
+int nghttp2_map_init(nghttp2_map *map, nghttp2_mem *mem);
+
+/*
+ * Deallocates any resources allocated for |map|. The stored entries
+ * are not freed by this function. Use nghttp2_map_each_free() to free
+ * each entries.
+ */
+void nghttp2_map_free(nghttp2_map *map);
+
+/*
+ * Deallocates each entries using |func| function and any resources
+ * allocated for |map|. The |func| function is responsible for freeing
+ * given the |entry| object. The |ptr| will be passed to the |func| as
+ * send argument. The return value of the |func| will be ignored.
+ */
+void nghttp2_map_each_free(nghttp2_map *map,
+                           int (*func)(nghttp2_map_entry *entry, void *ptr),
+                           void *ptr);
+
+/*
+ * Initializes the |entry| with the |key|. All entries to be inserted
+ * to the map must be initialized with this function.
+ */
+void nghttp2_map_entry_init(nghttp2_map_entry *entry, key_type key);
+
+/*
+ * Inserts the new |entry| with the key |entry->key| to the map |map|.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_INVALID_ARGUMENT
+ *     The item associated by |key| already exists.
+ * NGHTTP2_ERR_NOMEM
+ *   Out of memory
+ */
+int nghttp2_map_insert(nghttp2_map *map, nghttp2_map_entry *entry);
+
+/*
+ * Returns the entry associated by the key |key|.  If there is no such
+ * entry, this function returns NULL.
+ */
+nghttp2_map_entry *nghttp2_map_find(nghttp2_map *map, key_type key);
+
+/*
+ * Removes the entry associated by the key |key| from the |map|.  The
+ * removed entry is not freed by this function.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_INVALID_ARGUMENT
+ *     The entry associated by |key| does not exist.
+ */
+int nghttp2_map_remove(nghttp2_map *map, key_type key);
+
+/*
+ * Returns the number of items stored in the map |map|.
+ */
+size_t nghttp2_map_size(nghttp2_map *map);
+
+/*
+ * Applies the function |func| to each entry in the |map| with the
+ * optional user supplied pointer |ptr|.
+ *
+ * If the |func| returns 0, this function calls the |func| with the
+ * next entry. If the |func| returns nonzero, it will not call the
+ * |func| for further entries and return the return value of the
+ * |func| immediately.  Thus, this function returns 0 if all the
+ * invocations of the |func| return 0, or nonzero value which the last
+ * invocation of |func| returns.
+ *
+ * Don't use this function to free each entry. Use
+ * nghttp2_map_each_free() instead.
+ */
+int nghttp2_map_each(nghttp2_map *map,
+                     int (*func)(nghttp2_map_entry *entry, void *ptr),
+                     void *ptr);
+
+#endif /* NGHTTP2_MAP_H */

lib/nghttp2_mem.c

@@ -0,0 +1,74 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2014 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_mem.h"
+
+static void *default_malloc(size_t size, void *mem_user_data) {
+  (void)mem_user_data;
+
+  return malloc(size);
+}
+
+static void default_free(void *ptr, void *mem_user_data) {
+  (void)mem_user_data;
+
+  free(ptr);
+}
+
+static void *default_calloc(size_t nmemb, size_t size, void *mem_user_data) {
+  (void)mem_user_data;
+
+  return calloc(nmemb, size);
+}
+
+static void *default_realloc(void *ptr, size_t size, void *mem_user_data) {
+  (void)mem_user_data;
+
+  return realloc(ptr, size);
+}
+
+static nghttp2_mem mem_default = {NULL, default_malloc, default_free,
+                                  default_calloc, default_realloc};
+
+nghttp2_mem *nghttp2_mem_default(void) { return &mem_default; }
+
+void *nghttp2_mem_malloc(nghttp2_mem *mem, size_t size) {
+  return mem->malloc(size, mem->mem_user_data);
+}
+
+void nghttp2_mem_free(nghttp2_mem *mem, void *ptr) {
+  mem->free(ptr, mem->mem_user_data);
+}
+
+void nghttp2_mem_free2(nghttp2_free free_func, void *ptr, void *mem_user_data) {
+  free_func(ptr, mem_user_data);
+}
+
+void *nghttp2_mem_calloc(nghttp2_mem *mem, size_t nmemb, size_t size) {
+  return mem->calloc(nmemb, size, mem->mem_user_data);
+}
+
+void *nghttp2_mem_realloc(nghttp2_mem *mem, void *ptr, size_t size) {
+  return mem->realloc(ptr, size, mem->mem_user_data);
+}

lib/nghttp2_mem.h

@@ -0,0 +1,45 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2014 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_MEM_H
+#define NGHTTP2_MEM_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+
+/* The default, system standard memory allocator */
+nghttp2_mem *nghttp2_mem_default(void);
+
+/* Convenient wrapper functions to call allocator function in
+   |mem|. */
+void *nghttp2_mem_malloc(nghttp2_mem *mem, size_t size);
+void nghttp2_mem_free(nghttp2_mem *mem, void *ptr);
+void nghttp2_mem_free2(nghttp2_free free_func, void *ptr, void *mem_user_data);
+void *nghttp2_mem_calloc(nghttp2_mem *mem, size_t nmemb, size_t size);
+void *nghttp2_mem_realloc(nghttp2_mem *mem, void *ptr, size_t size);
+
+#endif /* NGHTTP2_MEM_H */

lib/nghttp2_net.h

@@ -0,0 +1,91 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_NET_H
+#define NGHTTP2_NET_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#ifdef HAVE_ARPA_INET_H
+#  include <arpa/inet.h>
+#endif /* HAVE_ARPA_INET_H */
+
+#ifdef HAVE_NETINET_IN_H
+#  include <netinet/in.h>
+#endif /* HAVE_NETINET_IN_H */
+
+#include <nghttp2/nghttp2.h>
+
+#if defined(WIN32)
+/* Windows requires ws2_32 library for ntonl family functions.  We
+   define inline functions for those function so that we don't have
+   dependeny on that lib. */
+
+#  ifdef _MSC_VER
+#    define STIN static __inline
+#  else
+#    define STIN static inline
+#  endif
+
+STIN uint32_t htonl(uint32_t hostlong) {
+  uint32_t res;
+  unsigned char *p = (unsigned char *)&res;
+  *p++ = hostlong >> 24;
+  *p++ = (hostlong >> 16) & 0xffu;
+  *p++ = (hostlong >> 8) & 0xffu;
+  *p = hostlong & 0xffu;
+  return res;
+}
+
+STIN uint16_t htons(uint16_t hostshort) {
+  uint16_t res;
+  unsigned char *p = (unsigned char *)&res;
+  *p++ = hostshort >> 8;
+  *p = hostshort & 0xffu;
+  return res;
+}
+
+STIN uint32_t ntohl(uint32_t netlong) {
+  uint32_t res;
+  unsigned char *p = (unsigned char *)&netlong;
+  res = *p++ << 24;
+  res += *p++ << 16;
+  res += *p++ << 8;
+  res += *p;
+  return res;
+}
+
+STIN uint16_t ntohs(uint16_t netshort) {
+  uint16_t res;
+  unsigned char *p = (unsigned char *)&netshort;
+  res = *p++ << 8;
+  res += *p;
+  return res;
+}
+
+#endif /* WIN32 */
+
+#endif /* NGHTTP2_NET_H */

lib/nghttp2_npn.c

@@ -0,0 +1,57 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_npn.h"
+
+#include <string.h>
+
+static int select_next_protocol(unsigned char **out, unsigned char *outlen,
+                                const unsigned char *in, unsigned int inlen,
+                                const char *key, unsigned int keylen) {
+  unsigned int i;
+  for (i = 0; i + keylen <= inlen; i += (unsigned int)(in[i] + 1)) {
+    if (memcmp(&in[i], key, keylen) == 0) {
+      *out = (unsigned char *)&in[i + 1];
+      *outlen = in[i];
+      return 0;
+    }
+  }
+  return -1;
+}
+
+#define NGHTTP2_HTTP_1_1_ALPN "\x8http/1.1"
+#define NGHTTP2_HTTP_1_1_ALPN_LEN (sizeof(NGHTTP2_HTTP_1_1_ALPN) - 1)
+
+int nghttp2_select_next_protocol(unsigned char **out, unsigned char *outlen,
+                                 const unsigned char *in, unsigned int inlen) {
+  if (select_next_protocol(out, outlen, in, inlen, NGHTTP2_PROTO_ALPN,
+                           NGHTTP2_PROTO_ALPN_LEN) == 0) {
+    return 1;
+  }
+  if (select_next_protocol(out, outlen, in, inlen, NGHTTP2_HTTP_1_1_ALPN,
+                           NGHTTP2_HTTP_1_1_ALPN_LEN) == 0) {
+    return 0;
+  }
+  return -1;
+}

lib/nghttp2_npn.h

@@ -0,0 +1,34 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_NPN_H
+#define NGHTTP2_NPN_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+
+#endif /* NGHTTP2_NPN_H */

lib/nghttp2_option.c

@@ -0,0 +1,123 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2014 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_option.h"
+
+#include "nghttp2_session.h"
+
+int nghttp2_option_new(nghttp2_option **option_ptr) {
+  *option_ptr = calloc(1, sizeof(nghttp2_option));
+
+  if (*option_ptr == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  return 0;
+}
+
+void nghttp2_option_del(nghttp2_option *option) { free(option); }
+
+void nghttp2_option_set_no_auto_window_update(nghttp2_option *option, int val) {
+  option->opt_set_mask |= NGHTTP2_OPT_NO_AUTO_WINDOW_UPDATE;
+  option->no_auto_window_update = val;
+}
+
+void nghttp2_option_set_peer_max_concurrent_streams(nghttp2_option *option,
+                                                    uint32_t val) {
+  option->opt_set_mask |= NGHTTP2_OPT_PEER_MAX_CONCURRENT_STREAMS;
+  option->peer_max_concurrent_streams = val;
+}
+
+void nghttp2_option_set_no_recv_client_magic(nghttp2_option *option, int val) {
+  option->opt_set_mask |= NGHTTP2_OPT_NO_RECV_CLIENT_MAGIC;
+  option->no_recv_client_magic = val;
+}
+
+void nghttp2_option_set_no_http_messaging(nghttp2_option *option, int val) {
+  option->opt_set_mask |= NGHTTP2_OPT_NO_HTTP_MESSAGING;
+  option->no_http_messaging = val;
+}
+
+void nghttp2_option_set_max_reserved_remote_streams(nghttp2_option *option,
+                                                    uint32_t val) {
+  option->opt_set_mask |= NGHTTP2_OPT_MAX_RESERVED_REMOTE_STREAMS;
+  option->max_reserved_remote_streams = val;
+}
+
+static void set_ext_type(uint8_t *ext_types, uint8_t type) {
+  ext_types[type / 8] = (uint8_t)(ext_types[type / 8] | (1 << (type & 0x7)));
+}
+
+void nghttp2_option_set_user_recv_extension_type(nghttp2_option *option,
+                                                 uint8_t type) {
+  if (type < 10) {
+    return;
+  }
+
+  option->opt_set_mask |= NGHTTP2_OPT_USER_RECV_EXT_TYPES;
+  set_ext_type(option->user_recv_ext_types, type);
+}
+
+void nghttp2_option_set_builtin_recv_extension_type(nghttp2_option *option,
+                                                    uint8_t type) {
+  switch (type) {
+  case NGHTTP2_ALTSVC:
+    option->opt_set_mask |= NGHTTP2_OPT_BUILTIN_RECV_EXT_TYPES;
+    option->builtin_recv_ext_types |= NGHTTP2_TYPEMASK_ALTSVC;
+    return;
+  case NGHTTP2_ORIGIN:
+    option->opt_set_mask |= NGHTTP2_OPT_BUILTIN_RECV_EXT_TYPES;
+    option->builtin_recv_ext_types |= NGHTTP2_TYPEMASK_ORIGIN;
+    return;
+  default:
+    return;
+  }
+}
+
+void nghttp2_option_set_no_auto_ping_ack(nghttp2_option *option, int val) {
+  option->opt_set_mask |= NGHTTP2_OPT_NO_AUTO_PING_ACK;
+  option->no_auto_ping_ack = val;
+}
+
+void nghttp2_option_set_max_send_header_block_length(nghttp2_option *option,
+                                                     size_t val) {
+  option->opt_set_mask |= NGHTTP2_OPT_MAX_SEND_HEADER_BLOCK_LENGTH;
+  option->max_send_header_block_length = val;
+}
+
+void nghttp2_option_set_max_deflate_dynamic_table_size(nghttp2_option *option,
+                                                       size_t val) {
+  option->opt_set_mask |= NGHTTP2_OPT_MAX_DEFLATE_DYNAMIC_TABLE_SIZE;
+  option->max_deflate_dynamic_table_size = val;
+}
+
+void nghttp2_option_set_no_closed_streams(nghttp2_option *option, int val) {
+  option->opt_set_mask |= NGHTTP2_OPT_NO_CLOSED_STREAMS;
+  option->no_closed_streams = val;
+}
+
+void nghttp2_option_set_max_outbound_ack(nghttp2_option *option, size_t val) {
+  option->opt_set_mask |= NGHTTP2_OPT_MAX_OUTBOUND_ACK;
+  option->max_outbound_ack = val;
+}

lib/nghttp2_option.h

@@ -0,0 +1,131 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2014 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_OPTION_H
+#define NGHTTP2_OPTION_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+
+/**
+ * Configuration options
+ */
+typedef enum {
+  /**
+   * This option prevents the library from sending WINDOW_UPDATE for a
+   * connection automatically.  If this option is set to nonzero, the
+   * library won't send WINDOW_UPDATE for DATA until application calls
+   * nghttp2_session_consume() to indicate the amount of consumed
+   * DATA.  By default, this option is set to zero.
+   */
+  NGHTTP2_OPT_NO_AUTO_WINDOW_UPDATE = 1,
+  /**
+   * This option sets the SETTINGS_MAX_CONCURRENT_STREAMS value of
+   * remote endpoint as if it is received in SETTINGS frame. Without
+   * specifying this option, before the local endpoint receives
+   * SETTINGS_MAX_CONCURRENT_STREAMS in SETTINGS frame from remote
+   * endpoint, SETTINGS_MAX_CONCURRENT_STREAMS is unlimited. This may
+   * cause problem if local endpoint submits lots of requests
+   * initially and sending them at once to the remote peer may lead to
+   * the rejection of some requests. Specifying this option to the
+   * sensible value, say 100, may avoid this kind of issue. This value
+   * will be overwritten if the local endpoint receives
+   * SETTINGS_MAX_CONCURRENT_STREAMS from the remote endpoint.
+   */
+  NGHTTP2_OPT_PEER_MAX_CONCURRENT_STREAMS = 1 << 1,
+  NGHTTP2_OPT_NO_RECV_CLIENT_MAGIC = 1 << 2,
+  NGHTTP2_OPT_NO_HTTP_MESSAGING = 1 << 3,
+  NGHTTP2_OPT_MAX_RESERVED_REMOTE_STREAMS = 1 << 4,
+  NGHTTP2_OPT_USER_RECV_EXT_TYPES = 1 << 5,
+  NGHTTP2_OPT_NO_AUTO_PING_ACK = 1 << 6,
+  NGHTTP2_OPT_BUILTIN_RECV_EXT_TYPES = 1 << 7,
+  NGHTTP2_OPT_MAX_SEND_HEADER_BLOCK_LENGTH = 1 << 8,
+  NGHTTP2_OPT_MAX_DEFLATE_DYNAMIC_TABLE_SIZE = 1 << 9,
+  NGHTTP2_OPT_NO_CLOSED_STREAMS = 1 << 10,
+  NGHTTP2_OPT_MAX_OUTBOUND_ACK = 1 << 11,
+} nghttp2_option_flag;
+
+/**
+ * Struct to store option values for nghttp2_session.
+ */
+struct nghttp2_option {
+  /**
+   * NGHTTP2_OPT_MAX_SEND_HEADER_BLOCK_LENGTH
+   */
+  size_t max_send_header_block_length;
+  /**
+   * NGHTTP2_OPT_MAX_DEFLATE_DYNAMIC_TABLE_SIZE
+   */
+  size_t max_deflate_dynamic_table_size;
+  /**
+   * NGHTTP2_OPT_MAX_OUTBOUND_ACK
+   */
+  size_t max_outbound_ack;
+  /**
+   * Bitwise OR of nghttp2_option_flag to determine that which fields
+   * are specified.
+   */
+  uint32_t opt_set_mask;
+  /**
+   * NGHTTP2_OPT_PEER_MAX_CONCURRENT_STREAMS
+   */
+  uint32_t peer_max_concurrent_streams;
+  /**
+   * NGHTTP2_OPT_MAX_RESERVED_REMOTE_STREAMS
+   */
+  uint32_t max_reserved_remote_streams;
+  /**
+   * NGHTTP2_OPT_BUILTIN_RECV_EXT_TYPES
+   */
+  uint32_t builtin_recv_ext_types;
+  /**
+   * NGHTTP2_OPT_NO_AUTO_WINDOW_UPDATE
+   */
+  int no_auto_window_update;
+  /**
+   * NGHTTP2_OPT_NO_RECV_CLIENT_MAGIC
+   */
+  int no_recv_client_magic;
+  /**
+   * NGHTTP2_OPT_NO_HTTP_MESSAGING
+   */
+  int no_http_messaging;
+  /**
+   * NGHTTP2_OPT_NO_AUTO_PING_ACK
+   */
+  int no_auto_ping_ack;
+  /**
+   * NGHTTP2_OPT_NO_CLOSED_STREAMS
+   */
+  int no_closed_streams;
+  /**
+   * NGHTTP2_OPT_USER_RECV_EXT_TYPES
+   */
+  uint8_t user_recv_ext_types[32];
+};
+
+#endif /* NGHTTP2_OPTION_H */

lib/nghttp2_outbound_item.c

@@ -0,0 +1,127 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_outbound_item.h"
+
+#include <assert.h>
+#include <string.h>
+
+void nghttp2_outbound_item_init(nghttp2_outbound_item *item) {
+  item->cycle = 0;
+  item->qnext = NULL;
+  item->queued = 0;
+
+  memset(&item->aux_data, 0, sizeof(nghttp2_aux_data));
+}
+
+void nghttp2_outbound_item_free(nghttp2_outbound_item *item, nghttp2_mem *mem) {
+  nghttp2_frame *frame;
+
+  if (item == NULL) {
+    return;
+  }
+
+  frame = &item->frame;
+
+  switch (frame->hd.type) {
+  case NGHTTP2_DATA:
+    nghttp2_frame_data_free(&frame->data);
+    break;
+  case NGHTTP2_HEADERS:
+    nghttp2_frame_headers_free(&frame->headers, mem);
+    break;
+  case NGHTTP2_PRIORITY:
+    nghttp2_frame_priority_free(&frame->priority);
+    break;
+  case NGHTTP2_RST_STREAM:
+    nghttp2_frame_rst_stream_free(&frame->rst_stream);
+    break;
+  case NGHTTP2_SETTINGS:
+    nghttp2_frame_settings_free(&frame->settings, mem);
+    break;
+  case NGHTTP2_PUSH_PROMISE:
+    nghttp2_frame_push_promise_free(&frame->push_promise, mem);
+    break;
+  case NGHTTP2_PING:
+    nghttp2_frame_ping_free(&frame->ping);
+    break;
+  case NGHTTP2_GOAWAY:
+    nghttp2_frame_goaway_free(&frame->goaway, mem);
+    break;
+  case NGHTTP2_WINDOW_UPDATE:
+    nghttp2_frame_window_update_free(&frame->window_update);
+    break;
+  default: {
+    nghttp2_ext_aux_data *aux_data;
+
+    aux_data = &item->aux_data.ext;
+
+    if (aux_data->builtin == 0) {
+      nghttp2_frame_extension_free(&frame->ext);
+      break;
+    }
+
+    switch (frame->hd.type) {
+    case NGHTTP2_ALTSVC:
+      nghttp2_frame_altsvc_free(&frame->ext, mem);
+      break;
+    case NGHTTP2_ORIGIN:
+      nghttp2_frame_origin_free(&frame->ext, mem);
+      break;
+    default:
+      assert(0);
+      break;
+    }
+  }
+  }
+}
+
+void nghttp2_outbound_queue_init(nghttp2_outbound_queue *q) {
+  q->head = q->tail = NULL;
+  q->n = 0;
+}
+
+void nghttp2_outbound_queue_push(nghttp2_outbound_queue *q,
+                                 nghttp2_outbound_item *item) {
+  if (q->tail) {
+    q->tail = q->tail->qnext = item;
+  } else {
+    q->head = q->tail = item;
+  }
+  ++q->n;
+}
+
+void nghttp2_outbound_queue_pop(nghttp2_outbound_queue *q) {
+  nghttp2_outbound_item *item;
+  if (!q->head) {
+    return;
+  }
+  item = q->head;
+  q->head = q->head->qnext;
+  item->qnext = NULL;
+  if (!q->head) {
+    q->tail = NULL;
+  }
+  --q->n;
+}

lib/nghttp2_outbound_item.h

@@ -0,0 +1,166 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_OUTBOUND_ITEM_H
+#define NGHTTP2_OUTBOUND_ITEM_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+#include "nghttp2_frame.h"
+#include "nghttp2_mem.h"
+
+/* struct used for HEADERS and PUSH_PROMISE frame */
+typedef struct {
+  nghttp2_data_provider data_prd;
+  void *stream_user_data;
+  /* error code when request HEADERS is canceled by RST_STREAM while
+     it is in queue. */
+  uint32_t error_code;
+  /* nonzero if request HEADERS is canceled.  The error code is stored
+     in |error_code|. */
+  uint8_t canceled;
+} nghttp2_headers_aux_data;
+
+/* struct used for DATA frame */
+typedef struct {
+  /**
+   * The data to be sent for this DATA frame.
+   */
+  nghttp2_data_provider data_prd;
+  /**
+   * The flags of DATA frame.  We use separate flags here and
+   * nghttp2_data frame.  The latter contains flags actually sent to
+   * peer.  This |flags| may contain NGHTTP2_FLAG_END_STREAM and only
+   * when |eof| becomes nonzero, flags in nghttp2_data has
+   * NGHTTP2_FLAG_END_STREAM set.
+   */
+  uint8_t flags;
+  /**
+   * The flag to indicate whether EOF was reached or not. Initially
+   * |eof| is 0. It becomes 1 after all data were read.
+   */
+  uint8_t eof;
+  /**
+   * The flag to indicate that NGHTTP2_DATA_FLAG_NO_COPY is used.
+   */
+  uint8_t no_copy;
+} nghttp2_data_aux_data;
+
+typedef enum {
+  NGHTTP2_GOAWAY_AUX_NONE = 0x0,
+  /* indicates that session should be terminated after the
+     transmission of this frame. */
+  NGHTTP2_GOAWAY_AUX_TERM_ON_SEND = 0x1,
+  /* indicates that this GOAWAY is just a notification for graceful
+     shutdown.  No nghttp2_session.goaway_flags should be updated on
+     the reaction to this frame. */
+  NGHTTP2_GOAWAY_AUX_SHUTDOWN_NOTICE = 0x2
+} nghttp2_goaway_aux_flag;
+
+/* struct used for GOAWAY frame */
+typedef struct {
+  /* bitwise-OR of one or more of nghttp2_goaway_aux_flag. */
+  uint8_t flags;
+} nghttp2_goaway_aux_data;
+
+/* struct used for extension frame */
+typedef struct {
+  /* nonzero if this extension frame is serialized by library
+     function, instead of user-defined callbacks. */
+  uint8_t builtin;
+} nghttp2_ext_aux_data;
+
+/* Additional data which cannot be stored in nghttp2_frame struct */
+typedef union {
+  nghttp2_data_aux_data data;
+  nghttp2_headers_aux_data headers;
+  nghttp2_goaway_aux_data goaway;
+  nghttp2_ext_aux_data ext;
+} nghttp2_aux_data;
+
+struct nghttp2_outbound_item;
+typedef struct nghttp2_outbound_item nghttp2_outbound_item;
+
+struct nghttp2_outbound_item {
+  nghttp2_frame frame;
+  /* Storage for extension frame payload.  frame->ext.payload points
+     to this structure to avoid frequent memory allocation. */
+  nghttp2_ext_frame_payload ext_frame_payload;
+  nghttp2_aux_data aux_data;
+  /* The priority used in priority comparion.  Smaller is served
+     earlier.  For PING, SETTINGS and non-DATA frames (excluding
+     response HEADERS frame) have dedicated cycle value defined above.
+     For DATA frame, cycle is computed by taking into account of
+     effective weight and frame payload length previously sent, so
+     that the amount of transmission is distributed across streams
+     proportional to effective weight (inside a tree). */
+  uint64_t cycle;
+  nghttp2_outbound_item *qnext;
+  /* nonzero if this object is queued, except for DATA or HEADERS
+     which are attached to stream as item. */
+  uint8_t queued;
+};
+
+/*
+ * Initializes |item|.  No memory allocation is done in this function.
+ * Don't call nghttp2_outbound_item_free() until frame member is
+ * initialized.
+ */
+void nghttp2_outbound_item_init(nghttp2_outbound_item *item);
+
+/*
+ * Deallocates resource for |item|. If |item| is NULL, this function
+ * does nothing.
+ */
+void nghttp2_outbound_item_free(nghttp2_outbound_item *item, nghttp2_mem *mem);
+
+/*
+ * queue for nghttp2_outbound_item.
+ */
+typedef struct {
+  nghttp2_outbound_item *head, *tail;
+  /* number of items in this queue. */
+  size_t n;
+} nghttp2_outbound_queue;
+
+void nghttp2_outbound_queue_init(nghttp2_outbound_queue *q);
+
+/* Pushes |item| into |q| */
+void nghttp2_outbound_queue_push(nghttp2_outbound_queue *q,
+                                 nghttp2_outbound_item *item);
+
+/* Pops |item| at the top from |q|.  If |q| is empty, nothing
+   happens. */
+void nghttp2_outbound_queue_pop(nghttp2_outbound_queue *q);
+
+/* Returns the top item. */
+#define nghttp2_outbound_queue_top(Q) ((Q)->head)
+
+/* Returns the size of the queue */
+#define nghttp2_outbound_queue_size(Q) ((Q)->n)
+
+#endif /* NGHTTP2_OUTBOUND_ITEM_H */

lib/nghttp2_pq.c

@@ -0,0 +1,184 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_pq.h"
+
+#include <stdio.h>
+#include <assert.h>
+
+#include "nghttp2_helper.h"
+
+int nghttp2_pq_init(nghttp2_pq *pq, nghttp2_less less, nghttp2_mem *mem) {
+  pq->mem = mem;
+  pq->capacity = 0;
+  pq->q = NULL;
+  pq->length = 0;
+  pq->less = less;
+  return 0;
+}
+
+void nghttp2_pq_free(nghttp2_pq *pq) {
+  nghttp2_mem_free(pq->mem, pq->q);
+  pq->q = NULL;
+}
+
+static void swap(nghttp2_pq *pq, size_t i, size_t j) {
+  nghttp2_pq_entry *a = pq->q[i];
+  nghttp2_pq_entry *b = pq->q[j];
+
+  pq->q[i] = b;
+  b->index = i;
+  pq->q[j] = a;
+  a->index = j;
+}
+
+static void bubble_up(nghttp2_pq *pq, size_t index) {
+  size_t parent;
+  while (index != 0) {
+    parent = (index - 1) / 2;
+    if (!pq->less(pq->q[index], pq->q[parent])) {
+      return;
+    }
+    swap(pq, parent, index);
+    index = parent;
+  }
+}
+
+int nghttp2_pq_push(nghttp2_pq *pq, nghttp2_pq_entry *item) {
+  if (pq->capacity <= pq->length) {
+    void *nq;
+    size_t ncapacity;
+
+    ncapacity = nghttp2_max(4, (pq->capacity * 2));
+
+    nq = nghttp2_mem_realloc(pq->mem, pq->q,
+                             ncapacity * sizeof(nghttp2_pq_entry *));
+    if (nq == NULL) {
+      return NGHTTP2_ERR_NOMEM;
+    }
+    pq->capacity = ncapacity;
+    pq->q = nq;
+  }
+  pq->q[pq->length] = item;
+  item->index = pq->length;
+  ++pq->length;
+  bubble_up(pq, pq->length - 1);
+  return 0;
+}
+
+nghttp2_pq_entry *nghttp2_pq_top(nghttp2_pq *pq) {
+  if (pq->length == 0) {
+    return NULL;
+  } else {
+    return pq->q[0];
+  }
+}
+
+static void bubble_down(nghttp2_pq *pq, size_t index) {
+  size_t i, j, minindex;
+  for (;;) {
+    j = index * 2 + 1;
+    minindex = index;
+    for (i = 0; i < 2; ++i, ++j) {
+      if (j >= pq->length) {
+        break;
+      }
+      if (pq->less(pq->q[j], pq->q[minindex])) {
+        minindex = j;
+      }
+    }
+    if (minindex == index) {
+      return;
+    }
+    swap(pq, index, minindex);
+    index = minindex;
+  }
+}
+
+void nghttp2_pq_pop(nghttp2_pq *pq) {
+  if (pq->length > 0) {
+    pq->q[0] = pq->q[pq->length - 1];
+    pq->q[0]->index = 0;
+    --pq->length;
+    bubble_down(pq, 0);
+  }
+}
+
+void nghttp2_pq_remove(nghttp2_pq *pq, nghttp2_pq_entry *item) {
+  assert(pq->q[item->index] == item);
+
+  if (item->index == 0) {
+    nghttp2_pq_pop(pq);
+    return;
+  }
+
+  if (item->index == pq->length - 1) {
+    --pq->length;
+    return;
+  }
+
+  pq->q[item->index] = pq->q[pq->length - 1];
+  pq->q[item->index]->index = item->index;
+  --pq->length;
+
+  if (pq->less(item, pq->q[item->index])) {
+    bubble_down(pq, item->index);
+  } else {
+    bubble_up(pq, item->index);
+  }
+}
+
+int nghttp2_pq_empty(nghttp2_pq *pq) { return pq->length == 0; }
+
+size_t nghttp2_pq_size(nghttp2_pq *pq) { return pq->length; }
+
+void nghttp2_pq_update(nghttp2_pq *pq, nghttp2_pq_item_cb fun, void *arg) {
+  size_t i;
+  int rv = 0;
+  if (pq->length == 0) {
+    return;
+  }
+  for (i = 0; i < pq->length; ++i) {
+    rv |= (*fun)(pq->q[i], arg);
+  }
+  if (rv) {
+    for (i = pq->length; i > 0; --i) {
+      bubble_down(pq, i - 1);
+    }
+  }
+}
+
+int nghttp2_pq_each(nghttp2_pq *pq, nghttp2_pq_item_cb fun, void *arg) {
+  size_t i;
+
+  if (pq->length == 0) {
+    return 0;
+  }
+  for (i = 0; i < pq->length; ++i) {
+    if ((*fun)(pq->q[i], arg)) {
+      return 1;
+    }
+  }
+  return 0;
+}

lib/nghttp2_pq.h

@@ -0,0 +1,130 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_PQ_H
+#define NGHTTP2_PQ_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+#include "nghttp2_int.h"
+#include "nghttp2_mem.h"
+
+/* Implementation of priority queue */
+
+typedef struct {
+  size_t index;
+} nghttp2_pq_entry;
+
+typedef struct {
+  /* The pointer to the pointer to the item stored */
+  nghttp2_pq_entry **q;
+  /* Memory allocator */
+  nghttp2_mem *mem;
+  /* The number of items stored */
+  size_t length;
+  /* The maximum number of items this pq can store. This is
+     automatically extended when length is reached to this value. */
+  size_t capacity;
+  /* The less function between items */
+  nghttp2_less less;
+} nghttp2_pq;
+
+/*
+ * Initializes priority queue |pq| with compare function |cmp|.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ */
+int nghttp2_pq_init(nghttp2_pq *pq, nghttp2_less less, nghttp2_mem *mem);
+
+/*
+ * Deallocates any resources allocated for |pq|.  The stored items are
+ * not freed by this function.
+ */
+void nghttp2_pq_free(nghttp2_pq *pq);
+
+/*
+ * Adds |item| to the priority queue |pq|.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ */
+int nghttp2_pq_push(nghttp2_pq *pq, nghttp2_pq_entry *item);
+
+/*
+ * Returns item at the top of the queue |pq|. If the queue is empty,
+ * this function returns NULL.
+ */
+nghttp2_pq_entry *nghttp2_pq_top(nghttp2_pq *pq);
+
+/*
+ * Pops item at the top of the queue |pq|. The popped item is not
+ * freed by this function.
+ */
+void nghttp2_pq_pop(nghttp2_pq *pq);
+
+/*
+ * Returns nonzero if the queue |pq| is empty.
+ */
+int nghttp2_pq_empty(nghttp2_pq *pq);
+
+/*
+ * Returns the number of items in the queue |pq|.
+ */
+size_t nghttp2_pq_size(nghttp2_pq *pq);
+
+typedef int (*nghttp2_pq_item_cb)(nghttp2_pq_entry *item, void *arg);
+
+/*
+ * Updates each item in |pq| using function |fun| and re-construct
+ * priority queue. The |fun| must return non-zero if it modifies the
+ * item in a way that it affects ordering in the priority queue. The
+ * |arg| is passed to the 2nd parameter of |fun|.
+ */
+void nghttp2_pq_update(nghttp2_pq *pq, nghttp2_pq_item_cb fun, void *arg);
+
+/*
+ * Applys |fun| to each item in |pq|.  The |arg| is passed as arg
+ * parameter to callback function.  This function must not change the
+ * ordering key.  If the return value from callback is nonzero, this
+ * function returns 1 immediately without iterating remaining items.
+ * Otherwise this function returns 0.
+ */
+int nghttp2_pq_each(nghttp2_pq *pq, nghttp2_pq_item_cb fun, void *arg);
+
+/*
+ * Removes |item| from priority queue.
+ */
+void nghttp2_pq_remove(nghttp2_pq *pq, nghttp2_pq_entry *item);
+
+#endif /* NGHTTP2_PQ_H */

lib/nghttp2_priority_spec.c

@@ -0,0 +1,52 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2014 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_priority_spec.h"
+
+void nghttp2_priority_spec_init(nghttp2_priority_spec *pri_spec,
+                                int32_t stream_id, int32_t weight,
+                                int exclusive) {
+  pri_spec->stream_id = stream_id;
+  pri_spec->weight = weight;
+  pri_spec->exclusive = exclusive != 0;
+}
+
+void nghttp2_priority_spec_default_init(nghttp2_priority_spec *pri_spec) {
+  pri_spec->stream_id = 0;
+  pri_spec->weight = NGHTTP2_DEFAULT_WEIGHT;
+  pri_spec->exclusive = 0;
+}
+
+int nghttp2_priority_spec_check_default(const nghttp2_priority_spec *pri_spec) {
+  return pri_spec->stream_id == 0 &&
+         pri_spec->weight == NGHTTP2_DEFAULT_WEIGHT && pri_spec->exclusive == 0;
+}
+
+void nghttp2_priority_spec_normalize_weight(nghttp2_priority_spec *pri_spec) {
+  if (pri_spec->weight < NGHTTP2_MIN_WEIGHT) {
+    pri_spec->weight = NGHTTP2_MIN_WEIGHT;
+  } else if (pri_spec->weight > NGHTTP2_MAX_WEIGHT) {
+    pri_spec->weight = NGHTTP2_MAX_WEIGHT;
+  }
+}

lib/nghttp2_priority_spec.h

@@ -0,0 +1,42 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2014 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_PRIORITY_SPEC_H
+#define NGHTTP2_PRIORITY_SPEC_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+
+/*
+ * This function normalizes pri_spec->weight if it is out of range.
+ * If pri_spec->weight is less than NGHTTP2_MIN_WEIGHT, it is set to
+ * NGHTTP2_MIN_WEIGHT.  If pri_spec->weight is larger than
+ * NGHTTP2_MAX_WEIGHT, it is set to NGHTTP2_MAX_WEIGHT.
+ */
+void nghttp2_priority_spec_normalize_weight(nghttp2_priority_spec *pri_spec);
+
+#endif /* NGHTTP2_PRIORITY_SPEC_H */

lib/nghttp2_queue.c

@@ -0,0 +1,85 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_queue.h"
+
+#include <string.h>
+#include <assert.h>
+
+void nghttp2_queue_init(nghttp2_queue *queue) {
+  queue->front = queue->back = NULL;
+}
+
+void nghttp2_queue_free(nghttp2_queue *queue) {
+  if (!queue) {
+    return;
+  } else {
+    nghttp2_queue_cell *p = queue->front;
+    while (p) {
+      nghttp2_queue_cell *next = p->next;
+      free(p);
+      p = next;
+    }
+  }
+}
+
+int nghttp2_queue_push(nghttp2_queue *queue, void *data) {
+  nghttp2_queue_cell *new_cell =
+      (nghttp2_queue_cell *)malloc(sizeof(nghttp2_queue_cell));
+  if (!new_cell) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+  new_cell->data = data;
+  new_cell->next = NULL;
+  if (queue->back) {
+    queue->back->next = new_cell;
+    queue->back = new_cell;
+
+  } else {
+    queue->front = queue->back = new_cell;
+  }
+  return 0;
+}
+
+void nghttp2_queue_pop(nghttp2_queue *queue) {
+  nghttp2_queue_cell *front = queue->front;
+  assert(front);
+  queue->front = front->next;
+  if (front == queue->back) {
+    queue->back = NULL;
+  }
+  free(front);
+}
+
+void *nghttp2_queue_front(nghttp2_queue *queue) {
+  assert(queue->front);
+  return queue->front->data;
+}
+
+void *nghttp2_queue_back(nghttp2_queue *queue) {
+  assert(queue->back);
+  return queue->back->data;
+}
+
+int nghttp2_queue_empty(nghttp2_queue *queue) { return queue->front == NULL; }

lib/nghttp2_queue.h

@@ -0,0 +1,51 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_QUEUE_H
+#define NGHTTP2_QUEUE_H
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+
+typedef struct nghttp2_queue_cell {
+  void *data;
+  struct nghttp2_queue_cell *next;
+} nghttp2_queue_cell;
+
+typedef struct {
+  nghttp2_queue_cell *front, *back;
+} nghttp2_queue;
+
+void nghttp2_queue_init(nghttp2_queue *queue);
+void nghttp2_queue_free(nghttp2_queue *queue);
+int nghttp2_queue_push(nghttp2_queue *queue, void *data);
+void nghttp2_queue_pop(nghttp2_queue *queue);
+void *nghttp2_queue_front(nghttp2_queue *queue);
+void *nghttp2_queue_back(nghttp2_queue *queue);
+int nghttp2_queue_empty(nghttp2_queue *queue);
+
+#endif /* NGHTTP2_QUEUE_H */

lib/nghttp2_rcbuf.c

@@ -0,0 +1,102 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2016 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_rcbuf.h"
+
+#include <string.h>
+#include <assert.h>
+
+#include "nghttp2_mem.h"
+#include "nghttp2_helper.h"
+
+int nghttp2_rcbuf_new(nghttp2_rcbuf **rcbuf_ptr, size_t size,
+                      nghttp2_mem *mem) {
+  uint8_t *p;
+
+  p = nghttp2_mem_malloc(mem, sizeof(nghttp2_rcbuf) + size);
+  if (p == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  *rcbuf_ptr = (void *)p;
+
+  (*rcbuf_ptr)->mem_user_data = mem->mem_user_data;
+  (*rcbuf_ptr)->free = mem->free;
+  (*rcbuf_ptr)->base = p + sizeof(nghttp2_rcbuf);
+  (*rcbuf_ptr)->len = size;
+  (*rcbuf_ptr)->ref = 1;
+
+  return 0;
+}
+
+int nghttp2_rcbuf_new2(nghttp2_rcbuf **rcbuf_ptr, const uint8_t *src,
+                       size_t srclen, nghttp2_mem *mem) {
+  int rv;
+
+  rv = nghttp2_rcbuf_new(rcbuf_ptr, srclen + 1, mem);
+  if (rv != 0) {
+    return rv;
+  }
+
+  (*rcbuf_ptr)->len = srclen;
+  *nghttp2_cpymem((*rcbuf_ptr)->base, src, srclen) = '\0';
+
+  return 0;
+}
+
+/*
+ * Frees |rcbuf| itself, regardless of its reference cout.
+ */
+void nghttp2_rcbuf_del(nghttp2_rcbuf *rcbuf) {
+  nghttp2_mem_free2(rcbuf->free, rcbuf, rcbuf->mem_user_data);
+}
+
+void nghttp2_rcbuf_incref(nghttp2_rcbuf *rcbuf) {
+  if (rcbuf->ref == -1) {
+    return;
+  }
+
+  ++rcbuf->ref;
+}
+
+void nghttp2_rcbuf_decref(nghttp2_rcbuf *rcbuf) {
+  if (rcbuf == NULL || rcbuf->ref == -1) {
+    return;
+  }
+
+  assert(rcbuf->ref > 0);
+
+  if (--rcbuf->ref == 0) {
+    nghttp2_rcbuf_del(rcbuf);
+  }
+}
+
+nghttp2_vec nghttp2_rcbuf_get_buf(nghttp2_rcbuf *rcbuf) {
+  nghttp2_vec res = {rcbuf->base, rcbuf->len};
+  return res;
+}
+
+int nghttp2_rcbuf_is_static(const nghttp2_rcbuf *rcbuf) {
+  return rcbuf->ref == -1;
+}

lib/nghttp2_rcbuf.h

@@ -0,0 +1,80 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2016 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_RCBUF_H
+#define NGHTTP2_RCBUF_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+
+struct nghttp2_rcbuf {
+  /* custom memory allocator belongs to the mem parameter when
+     creating this object. */
+  void *mem_user_data;
+  nghttp2_free free;
+  /* The pointer to the underlying buffer */
+  uint8_t *base;
+  /* Size of buffer pointed by |base|. */
+  size_t len;
+  /* Reference count */
+  int32_t ref;
+};
+
+/*
+ * Allocates nghttp2_rcbuf object with |size| as initial buffer size.
+ * When the function succeeds, the reference count becomes 1.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM:
+ *     Out of memory.
+ */
+int nghttp2_rcbuf_new(nghttp2_rcbuf **rcbuf_ptr, size_t size, nghttp2_mem *mem);
+
+/*
+ * Like nghttp2_rcbuf_new(), but initializes the buffer with |src| of
+ * length |srclen|.  This function allocates additional byte at the
+ * end and puts '\0' into it, so that the resulting buffer could be
+ * used as NULL-terminated string.  Still (*rcbuf_ptr)->len equals to
+ * |srclen|.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM:
+ *     Out of memory.
+ */
+int nghttp2_rcbuf_new2(nghttp2_rcbuf **rcbuf_ptr, const uint8_t *src,
+                       size_t srclen, nghttp2_mem *mem);
+
+/*
+ * Frees |rcbuf| itself, regardless of its reference cout.
+ */
+void nghttp2_rcbuf_del(nghttp2_rcbuf *rcbuf);
+
+#endif /* NGHTTP2_RCBUF_H */

lib/nghttp2_session.h

@@ -0,0 +1,901 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_SESSION_H
+#define NGHTTP2_SESSION_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+#include "nghttp2_map.h"
+#include "nghttp2_frame.h"
+#include "nghttp2_hd.h"
+#include "nghttp2_stream.h"
+#include "nghttp2_outbound_item.h"
+#include "nghttp2_int.h"
+#include "nghttp2_buf.h"
+#include "nghttp2_callbacks.h"
+#include "nghttp2_mem.h"
+
+/* The global variable for tests where we want to disable strict
+   preface handling. */
+extern int nghttp2_enable_strict_preface;
+
+/*
+ * Option flags.
+ */
+typedef enum {
+  NGHTTP2_OPTMASK_NO_AUTO_WINDOW_UPDATE = 1 << 0,
+  NGHTTP2_OPTMASK_NO_RECV_CLIENT_MAGIC = 1 << 1,
+  NGHTTP2_OPTMASK_NO_HTTP_MESSAGING = 1 << 2,
+  NGHTTP2_OPTMASK_NO_AUTO_PING_ACK = 1 << 3,
+  NGHTTP2_OPTMASK_NO_CLOSED_STREAMS = 1 << 4
+} nghttp2_optmask;
+
+/*
+ * bitmask for built-in type to enable the default handling for that
+ * type of the frame.
+ */
+typedef enum {
+  NGHTTP2_TYPEMASK_NONE = 0,
+  NGHTTP2_TYPEMASK_ALTSVC = 1 << 0,
+  NGHTTP2_TYPEMASK_ORIGIN = 1 << 1
+} nghttp2_typemask;
+
+typedef enum {
+  NGHTTP2_OB_POP_ITEM,
+  NGHTTP2_OB_SEND_DATA,
+  NGHTTP2_OB_SEND_NO_COPY,
+  NGHTTP2_OB_SEND_CLIENT_MAGIC
+} nghttp2_outbound_state;
+
+typedef struct {
+  nghttp2_outbound_item *item;
+  nghttp2_bufs framebufs;
+  nghttp2_outbound_state state;
+} nghttp2_active_outbound_item;
+
+/* Buffer length for inbound raw byte stream used in
+   nghttp2_session_recv(). */
+#define NGHTTP2_INBOUND_BUFFER_LENGTH 16384
+
+/* The default maximum number of incoming reserved streams */
+#define NGHTTP2_MAX_INCOMING_RESERVED_STREAMS 200
+
+/* Even if we have less SETTINGS_MAX_CONCURRENT_STREAMS than this
+   number, we keep NGHTTP2_MIN_IDLE_STREAMS streams in idle state */
+#define NGHTTP2_MIN_IDLE_STREAMS 16
+
+/* The maximum number of items in outbound queue, which is considered
+   as flooding caused by peer.  All frames are not considered here.
+   We only consider PING + ACK and SETTINGS + ACK.  This is because
+   they both are response to the frame initiated by peer and peer can
+   send as many of them as they want.  If peer does not read network,
+   response frames are stacked up, which leads to memory exhaustion.
+   The value selected here is arbitrary, but safe value and if we have
+   these frames in this number, it is considered suspicious. */
+#define NGHTTP2_DEFAULT_MAX_OBQ_FLOOD_ITEM 1000
+
+/* The default value of maximum number of concurrent streams. */
+#define NGHTTP2_DEFAULT_MAX_CONCURRENT_STREAMS 0xffffffffu
+
+/* Internal state when receiving incoming frame */
+typedef enum {
+  /* Receiving frame header */
+  NGHTTP2_IB_READ_CLIENT_MAGIC,
+  NGHTTP2_IB_READ_FIRST_SETTINGS,
+  NGHTTP2_IB_READ_HEAD,
+  NGHTTP2_IB_READ_NBYTE,
+  NGHTTP2_IB_READ_HEADER_BLOCK,
+  NGHTTP2_IB_IGN_HEADER_BLOCK,
+  NGHTTP2_IB_IGN_PAYLOAD,
+  NGHTTP2_IB_FRAME_SIZE_ERROR,
+  NGHTTP2_IB_READ_SETTINGS,
+  NGHTTP2_IB_READ_GOAWAY_DEBUG,
+  NGHTTP2_IB_EXPECT_CONTINUATION,
+  NGHTTP2_IB_IGN_CONTINUATION,
+  NGHTTP2_IB_READ_PAD_DATA,
+  NGHTTP2_IB_READ_DATA,
+  NGHTTP2_IB_IGN_DATA,
+  NGHTTP2_IB_IGN_ALL,
+  NGHTTP2_IB_READ_ALTSVC_PAYLOAD,
+  NGHTTP2_IB_READ_ORIGIN_PAYLOAD,
+  NGHTTP2_IB_READ_EXTENSION_PAYLOAD
+} nghttp2_inbound_state;
+
+typedef struct {
+  nghttp2_frame frame;
+  /* Storage for extension frame payload.  frame->ext.payload points
+     to this structure to avoid frequent memory allocation. */
+  nghttp2_ext_frame_payload ext_frame_payload;
+  /* The received SETTINGS entry.  For the standard settings entries,
+     we only keep the last seen value.  For
+     SETTINGS_HEADER_TABLE_SIZE, we also keep minimum value in the
+     last index. */
+  nghttp2_settings_entry *iv;
+  /* buffer pointers to small buffer, raw_sbuf */
+  nghttp2_buf sbuf;
+  /* buffer pointers to large buffer, raw_lbuf */
+  nghttp2_buf lbuf;
+  /* Large buffer, malloced on demand */
+  uint8_t *raw_lbuf;
+  /* The number of entry filled in |iv| */
+  size_t niv;
+  /* The number of entries |iv| can store. */
+  size_t max_niv;
+  /* How many bytes we still need to receive for current frame */
+  size_t payloadleft;
+  /* padding length for the current frame */
+  size_t padlen;
+  nghttp2_inbound_state state;
+  /* Small buffer.  Currently the largest contiguous chunk to buffer
+     is frame header.  We buffer part of payload, but they are smaller
+     than frame header. */
+  uint8_t raw_sbuf[NGHTTP2_FRAME_HDLEN];
+} nghttp2_inbound_frame;
+
+typedef struct {
+  uint32_t header_table_size;
+  uint32_t enable_push;
+  uint32_t max_concurrent_streams;
+  uint32_t initial_window_size;
+  uint32_t max_frame_size;
+  uint32_t max_header_list_size;
+  uint32_t enable_connect_protocol;
+} nghttp2_settings_storage;
+
+typedef enum {
+  NGHTTP2_GOAWAY_NONE = 0,
+  /* Flag means that connection should be terminated after sending GOAWAY. */
+  NGHTTP2_GOAWAY_TERM_ON_SEND = 0x1,
+  /* Flag means GOAWAY to terminate session has been sent */
+  NGHTTP2_GOAWAY_TERM_SENT = 0x2,
+  /* Flag means GOAWAY was sent */
+  NGHTTP2_GOAWAY_SENT = 0x4,
+  /* Flag means GOAWAY was received */
+  NGHTTP2_GOAWAY_RECV = 0x8
+} nghttp2_goaway_flag;
+
+/* nghttp2_inflight_settings stores the SETTINGS entries which local
+   endpoint has sent to the remote endpoint, and has not received ACK
+   yet. */
+struct nghttp2_inflight_settings {
+  struct nghttp2_inflight_settings *next;
+  nghttp2_settings_entry *iv;
+  size_t niv;
+};
+
+typedef struct nghttp2_inflight_settings nghttp2_inflight_settings;
+
+struct nghttp2_session {
+  nghttp2_map /* <nghttp2_stream*> */ streams;
+  /* root of dependency tree*/
+  nghttp2_stream root;
+  /* Queue for outbound urgent frames (PING and SETTINGS) */
+  nghttp2_outbound_queue ob_urgent;
+  /* Queue for non-DATA frames */
+  nghttp2_outbound_queue ob_reg;
+  /* Queue for outbound stream-creating HEADERS (request or push
+     response) frame, which are subject to
+     SETTINGS_MAX_CONCURRENT_STREAMS limit. */
+  nghttp2_outbound_queue ob_syn;
+  nghttp2_active_outbound_item aob;
+  nghttp2_inbound_frame iframe;
+  nghttp2_hd_deflater hd_deflater;
+  nghttp2_hd_inflater hd_inflater;
+  nghttp2_session_callbacks callbacks;
+  /* Memory allocator */
+  nghttp2_mem mem;
+  void *user_data;
+  /* Points to the latest incoming closed stream.  NULL if there is no
+     closed stream.  Only used when session is initialized as
+     server. */
+  nghttp2_stream *closed_stream_head;
+  /* Points to the oldest incoming closed stream.  NULL if there is no
+     closed stream.  Only used when session is initialized as
+     server. */
+  nghttp2_stream *closed_stream_tail;
+  /* Points to the latest idle stream.  NULL if there is no idle
+     stream.  Only used when session is initialized as server .*/
+  nghttp2_stream *idle_stream_head;
+  /* Points to the oldest idle stream.  NULL if there is no idle
+     stream.  Only used when session is initialized as erver. */
+  nghttp2_stream *idle_stream_tail;
+  /* Queue of In-flight SETTINGS values.  SETTINGS bearing ACK is not
+     considered as in-flight. */
+  nghttp2_inflight_settings *inflight_settings_head;
+  /* The number of outgoing streams. This will be capped by
+     remote_settings.max_concurrent_streams. */
+  size_t num_outgoing_streams;
+  /* The number of incoming streams. This will be capped by
+     local_settings.max_concurrent_streams. */
+  size_t num_incoming_streams;
+  /* The number of incoming reserved streams.  This is the number of
+     streams in reserved (remote) state.  RFC 7540 does not limit this
+     number.  nghttp2 offers
+     nghttp2_option_set_max_reserved_remote_streams() to achieve this.
+     If it is used, num_incoming_streams is capped by
+     max_incoming_reserved_streams.  Client application should
+     consider to set this because without that server can send
+     arbitrary number of PUSH_PROMISE, and exhaust client's memory. */
+  size_t num_incoming_reserved_streams;
+  /* The maximum number of incoming reserved streams (reserved
+     (remote) state).  RST_STREAM will be sent for the pushed stream
+     which exceeds this limit. */
+  size_t max_incoming_reserved_streams;
+  /* The number of closed streams still kept in |streams| hash.  The
+     closed streams can be accessed through single linked list
+     |closed_stream_head|.  The current implementation only keeps
+     incoming streams and session is initialized as server. */
+  size_t num_closed_streams;
+  /* The number of idle streams kept in |streams| hash.  The idle
+     streams can be accessed through doubly linked list
+     |idle_stream_head|.  The current implementation only keeps idle
+     streams if session is initialized as server. */
+  size_t num_idle_streams;
+  /* The number of bytes allocated for nvbuf */
+  size_t nvbuflen;
+  /* Counter for detecting flooding in outbound queue.  If it exceeds
+     max_outbound_ack, session will be closed. */
+  size_t obq_flood_counter_;
+  /* The maximum number of outgoing SETTINGS ACK and PING ACK in
+     outbound queue. */
+  size_t max_outbound_ack;
+  /* The maximum length of header block to send.  Calculated by the
+     same way as nghttp2_hd_deflate_bound() does. */
+  size_t max_send_header_block_length;
+  /* Next Stream ID. Made unsigned int to detect >= (1 << 31). */
+  uint32_t next_stream_id;
+  /* The last stream ID this session initiated.  For client session,
+     this is the last stream ID it has sent.  For server session, it
+     is the last promised stream ID sent in PUSH_PROMISE. */
+  int32_t last_sent_stream_id;
+  /* The largest stream ID received so far */
+  int32_t last_recv_stream_id;
+  /* The largest stream ID which has been processed in some way. This
+     value will be used as last-stream-id when sending GOAWAY
+     frame. */
+  int32_t last_proc_stream_id;
+  /* Counter of unique ID of PING. Wraps when it exceeds
+     NGHTTP2_MAX_UNIQUE_ID */
+  uint32_t next_unique_id;
+  /* This is the last-stream-ID we have sent in GOAWAY */
+  int32_t local_last_stream_id;
+  /* This is the value in GOAWAY frame received from remote endpoint. */
+  int32_t remote_last_stream_id;
+  /* Current sender window size. This value is computed against the
+     current initial window size of remote endpoint. */
+  int32_t remote_window_size;
+  /* Keep track of the number of bytes received without
+     WINDOW_UPDATE. This could be negative after submitting negative
+     value to WINDOW_UPDATE. */
+  int32_t recv_window_size;
+  /* The number of bytes consumed by the application and now is
+     subject to WINDOW_UPDATE.  This is only used when auto
+     WINDOW_UPDATE is turned off. */
+  int32_t consumed_size;
+  /* The amount of recv_window_size cut using submitting negative
+     value to WINDOW_UPDATE */
+  int32_t recv_reduction;
+  /* window size for local flow control. It is initially set to
+     NGHTTP2_INITIAL_CONNECTION_WINDOW_SIZE and could be
+     increased/decreased by submitting WINDOW_UPDATE. See
+     nghttp2_submit_window_update(). */
+  int32_t local_window_size;
+  /* This flag is used to indicate that the local endpoint received initial
+     SETTINGS frame from the remote endpoint. */
+  uint8_t remote_settings_received;
+  /* Settings value received from the remote endpoint. */
+  nghttp2_settings_storage remote_settings;
+  /* Settings value of the local endpoint. */
+  nghttp2_settings_storage local_settings;
+  /* Option flags. This is bitwise-OR of 0 or more of nghttp2_optmask. */
+  uint32_t opt_flags;
+  /* Unacked local SETTINGS_MAX_CONCURRENT_STREAMS value. We use this
+     to refuse the incoming stream if it exceeds this value. */
+  uint32_t pending_local_max_concurrent_stream;
+  /* The bitwise OR of zero or more of nghttp2_typemask to indicate
+     that the default handling of extension frame is enabled. */
+  uint32_t builtin_recv_ext_types;
+  /* Unacked local ENABLE_PUSH value.  We use this to refuse
+     PUSH_PROMISE before SETTINGS ACK is received. */
+  uint8_t pending_enable_push;
+  /* Unacked local ENABLE_CONNECT_PROTOCOL value.  We use this to
+     accept :protocol header field before SETTINGS_ACK is received. */
+  uint8_t pending_enable_connect_protocol;
+  /* Nonzero if the session is server side. */
+  uint8_t server;
+  /* Flags indicating GOAWAY is sent and/or received. The flags are
+     composed by bitwise OR-ing nghttp2_goaway_flag. */
+  uint8_t goaway_flags;
+  /* This flag is used to reduce excessive queuing of WINDOW_UPDATE to
+     this session.  The nonzero does not necessarily mean
+     WINDOW_UPDATE is not queued. */
+  uint8_t window_update_queued;
+  /* Bitfield of extension frame types that application is willing to
+     receive.  To designate the bit of given frame type i, use
+     user_recv_ext_types[i / 8] & (1 << (i & 0x7)).  First 10 frame
+     types are standard frame types and not used in this bitfield.  If
+     bit is set, it indicates that incoming frame with that type is
+     passed to user defined callbacks, otherwise they are ignored. */
+  uint8_t user_recv_ext_types[32];
+};
+
+/* Struct used when updating initial window size of each active
+   stream. */
+typedef struct {
+  nghttp2_session *session;
+  int32_t new_window_size, old_window_size;
+} nghttp2_update_window_size_arg;
+
+typedef struct {
+  nghttp2_session *session;
+  /* linked list of streams to close */
+  nghttp2_stream *head;
+  int32_t last_stream_id;
+  /* nonzero if GOAWAY is sent to peer, which means we are going to
+     close incoming streams.  zero if GOAWAY is received from peer and
+     we are going to close outgoing streams. */
+  int incoming;
+} nghttp2_close_stream_on_goaway_arg;
+
+/* TODO stream timeout etc */
+
+/*
+ * Returns nonzero value if |stream_id| is initiated by local
+ * endpoint.
+ */
+int nghttp2_session_is_my_stream_id(nghttp2_session *session,
+                                    int32_t stream_id);
+
+/*
+ * Adds |item| to the outbound queue in |session|.  When this function
+ * succeeds, it takes ownership of |item|. So caller must not free it
+ * on success.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_STREAM_CLOSED
+ *     Stream already closed (DATA and PUSH_PROMISE frame only)
+ */
+int nghttp2_session_add_item(nghttp2_session *session,
+                             nghttp2_outbound_item *item);
+
+/*
+ * Adds RST_STREAM frame for the stream |stream_id| with the error
+ * code |error_code|. This is a convenient function built on top of
+ * nghttp2_session_add_frame() to add RST_STREAM easily.
+ *
+ * This function simply returns 0 without adding RST_STREAM frame if
+ * given stream is in NGHTTP2_STREAM_CLOSING state, because multiple
+ * RST_STREAM for a stream is redundant.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ */
+int nghttp2_session_add_rst_stream(nghttp2_session *session, int32_t stream_id,
+                                   uint32_t error_code);
+
+/*
+ * Adds PING frame. This is a convenient functin built on top of
+ * nghttp2_session_add_frame() to add PING easily.
+ *
+ * If the |opaque_data| is not NULL, it must point to 8 bytes memory
+ * region of data. The data pointed by |opaque_data| is copied. It can
+ * be NULL. In this case, 8 bytes NULL is used.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_FLOODED
+ *     There are too many items in outbound queue; this only happens
+ *     if NGHTTP2_FLAG_ACK is set in |flags|
+ */
+int nghttp2_session_add_ping(nghttp2_session *session, uint8_t flags,
+                             const uint8_t *opaque_data);
+
+/*
+ * Adds GOAWAY frame with the last-stream-ID |last_stream_id| and the
+ * error code |error_code|. This is a convenient function built on top
+ * of nghttp2_session_add_frame() to add GOAWAY easily.  The
+ * |aux_flags| are bitwise-OR of one or more of
+ * nghttp2_goaway_aux_flag.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_INVALID_ARGUMENT
+ *     The |opaque_data_len| is too large.
+ */
+int nghttp2_session_add_goaway(nghttp2_session *session, int32_t last_stream_id,
+                               uint32_t error_code, const uint8_t *opaque_data,
+                               size_t opaque_data_len, uint8_t aux_flags);
+
+/*
+ * Adds WINDOW_UPDATE frame with stream ID |stream_id| and
+ * window-size-increment |window_size_increment|. This is a convenient
+ * function built on top of nghttp2_session_add_frame() to add
+ * WINDOW_UPDATE easily.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ */
+int nghttp2_session_add_window_update(nghttp2_session *session, uint8_t flags,
+                                      int32_t stream_id,
+                                      int32_t window_size_increment);
+
+/*
+ * Adds SETTINGS frame.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_FLOODED
+ *     There are too many items in outbound queue; this only happens
+ *     if NGHTTP2_FLAG_ACK is set in |flags|
+ */
+int nghttp2_session_add_settings(nghttp2_session *session, uint8_t flags,
+                                 const nghttp2_settings_entry *iv, size_t niv);
+
+/*
+ * Creates new stream in |session| with stream ID |stream_id|,
+ * priority |pri_spec| and flags |flags|.  The |flags| is bitwise OR
+ * of nghttp2_stream_flag.  Since this function is called when initial
+ * HEADERS is sent or received, these flags are taken from it.  The
+ * state of stream is set to |initial_state|. The |stream_user_data|
+ * is a pointer to the arbitrary user supplied data to be associated
+ * to this stream.
+ *
+ * If |initial_state| is NGHTTP2_STREAM_RESERVED, this function sets
+ * NGHTTP2_STREAM_FLAG_PUSH flag set.
+ *
+ * This function returns a pointer to created new stream object, or
+ * NULL.
+ *
+ * This function adjusts neither the number of closed streams or idle
+ * streams.  The caller should manually call
+ * nghttp2_session_adjust_closed_stream() or
+ * nghttp2_session_adjust_idle_stream() respectively.
+ */
+nghttp2_stream *nghttp2_session_open_stream(nghttp2_session *session,
+                                            int32_t stream_id, uint8_t flags,
+                                            nghttp2_priority_spec *pri_spec,
+                                            nghttp2_stream_state initial_state,
+                                            void *stream_user_data);
+
+/*
+ * Closes stream whose stream ID is |stream_id|. The reason of closure
+ * is indicated by the |error_code|. When closing the stream,
+ * on_stream_close_callback will be called.
+ *
+ * If the session is initialized as server and |stream| is incoming
+ * stream, stream is just marked closed and this function calls
+ * nghttp2_session_keep_closed_stream() with |stream|.  Otherwise,
+ * |stream| will be deleted from memory.
+ *
+ * This function returns 0 if it succeeds, or one the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ * NGHTTP2_ERR_INVALID_ARGUMENT
+ *     The specified stream does not exist.
+ * NGHTTP2_ERR_CALLBACK_FAILURE
+ *     The callback function failed.
+ */
+int nghttp2_session_close_stream(nghttp2_session *session, int32_t stream_id,
+                                 uint32_t error_code);
+
+/*
+ * Deletes |stream| from memory.  After this function returns, stream
+ * cannot be accessed.
+ *
+ * This function returns 0 if it succeeds, or one the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ */
+int nghttp2_session_destroy_stream(nghttp2_session *session,
+                                   nghttp2_stream *stream);
+
+/*
+ * Tries to keep incoming closed stream |stream|.  Due to the
+ * limitation of maximum number of streams in memory, |stream| is not
+ * closed and just deleted from memory (see
+ * nghttp2_session_destroy_stream).
+ */
+void nghttp2_session_keep_closed_stream(nghttp2_session *session,
+                                        nghttp2_stream *stream);
+
+/*
+ * Appends |stream| to linked list |session->idle_stream_head|.  We
+ * apply fixed limit for list size.  To fit into that limit, one or
+ * more oldest streams are removed from list as necessary.
+ */
+void nghttp2_session_keep_idle_stream(nghttp2_session *session,
+                                      nghttp2_stream *stream);
+
+/*
+ * Detaches |stream| from idle streams linked list.
+ */
+void nghttp2_session_detach_idle_stream(nghttp2_session *session,
+                                        nghttp2_stream *stream);
+
+/*
+ * Deletes closed stream to ensure that number of incoming streams
+ * including active and closed is in the maximum number of allowed
+ * stream.
+ *
+ * This function returns 0 if it succeeds, or one the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ */
+int nghttp2_session_adjust_closed_stream(nghttp2_session *session);
+
+/*
+ * Deletes idle stream to ensure that number of idle streams is in
+ * certain limit.
+ *
+ * This function returns 0 if it succeeds, or one the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ */
+int nghttp2_session_adjust_idle_stream(nghttp2_session *session);
+
+/*
+ * If further receptions and transmissions over the stream |stream_id|
+ * are disallowed, close the stream with error code NGHTTP2_NO_ERROR.
+ *
+ * This function returns 0 if it
+ * succeeds, or one of the following negative error codes:
+ *
+ * NGHTTP2_ERR_INVALID_ARGUMENT
+ *     The specified stream does not exist.
+ */
+int nghttp2_session_close_stream_if_shut_rdwr(nghttp2_session *session,
+                                              nghttp2_stream *stream);
+
+int nghttp2_session_on_request_headers_received(nghttp2_session *session,
+                                                nghttp2_frame *frame);
+
+int nghttp2_session_on_response_headers_received(nghttp2_session *session,
+                                                 nghttp2_frame *frame,
+                                                 nghttp2_stream *stream);
+
+int nghttp2_session_on_push_response_headers_received(nghttp2_session *session,
+                                                      nghttp2_frame *frame,
+                                                      nghttp2_stream *stream);
+
+/*
+ * Called when HEADERS is received, assuming |frame| is properly
+ * initialized.  This function does first validate received frame and
+ * then open stream and call callback functions.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_IGN_HEADER_BLOCK
+ *     Frame was rejected and header block must be decoded but
+ *     result must be ignored.
+ * NGHTTP2_ERR_CALLBACK_FAILURE
+ *     The read_callback failed
+ */
+int nghttp2_session_on_headers_received(nghttp2_session *session,
+                                        nghttp2_frame *frame,
+                                        nghttp2_stream *stream);
+
+/*
+ * Called when PRIORITY is received, assuming |frame| is properly
+ * initialized.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_CALLBACK_FAILURE
+ *     The read_callback failed
+ */
+int nghttp2_session_on_priority_received(nghttp2_session *session,
+                                         nghttp2_frame *frame);
+
+/*
+ * Called when RST_STREAM is received, assuming |frame| is properly
+ * initialized.
+ *
+ * This function returns 0 if it succeeds, or one the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ * NGHTTP2_ERR_CALLBACK_FAILURE
+ *     The read_callback failed
+ */
+int nghttp2_session_on_rst_stream_received(nghttp2_session *session,
+                                           nghttp2_frame *frame);
+
+/*
+ * Called when SETTINGS is received, assuming |frame| is properly
+ * initialized. If |noack| is non-zero, SETTINGS with ACK will not be
+ * submitted. If |frame| has NGHTTP2_FLAG_ACK flag set, no SETTINGS
+ * with ACK will not be submitted regardless of |noack|.
+ *
+ * This function returns 0 if it succeeds, or one the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ * NGHTTP2_ERR_CALLBACK_FAILURE
+ *     The read_callback failed
+ * NGHTTP2_ERR_FLOODED
+ *     There are too many items in outbound queue, and this is most
+ *     likely caused by misbehaviour of peer.
+ */
+int nghttp2_session_on_settings_received(nghttp2_session *session,
+                                         nghttp2_frame *frame, int noack);
+
+/*
+ * Called when PUSH_PROMISE is received, assuming |frame| is properly
+ * initialized.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_IGN_HEADER_BLOCK
+ *     Frame was rejected and header block must be decoded but
+ *     result must be ignored.
+ * NGHTTP2_ERR_CALLBACK_FAILURE
+ *     The read_callback failed
+ */
+int nghttp2_session_on_push_promise_received(nghttp2_session *session,
+                                             nghttp2_frame *frame);
+
+/*
+ * Called when PING is received, assuming |frame| is properly
+ * initialized.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_CALLBACK_FAILURE
+ *     The callback function failed.
+ * NGHTTP2_ERR_FLOODED
+ *     There are too many items in outbound queue, and this is most
+ *     likely caused by misbehaviour of peer.
+ */
+int nghttp2_session_on_ping_received(nghttp2_session *session,
+                                     nghttp2_frame *frame);
+
+/*
+ * Called when GOAWAY is received, assuming |frame| is properly
+ * initialized.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_CALLBACK_FAILURE
+ *     The callback function failed.
+ */
+int nghttp2_session_on_goaway_received(nghttp2_session *session,
+                                       nghttp2_frame *frame);
+
+/*
+ * Called when WINDOW_UPDATE is received, assuming |frame| is properly
+ * initialized.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_CALLBACK_FAILURE
+ *     The callback function failed.
+ */
+int nghttp2_session_on_window_update_received(nghttp2_session *session,
+                                              nghttp2_frame *frame);
+
+/*
+ * Called when ALTSVC is received, assuming |frame| is properly
+ * initialized.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_CALLBACK_FAILURE
+ *     The callback function failed.
+ */
+int nghttp2_session_on_altsvc_received(nghttp2_session *session,
+                                       nghttp2_frame *frame);
+
+/*
+ * Called when ORIGIN is received, assuming |frame| is properly
+ * initialized.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_CALLBACK_FAILURE
+ *     The callback function failed.
+ */
+int nghttp2_session_on_origin_received(nghttp2_session *session,
+                                       nghttp2_frame *frame);
+
+/*
+ * Called when DATA is received, assuming |frame| is properly
+ * initialized.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_CALLBACK_FAILURE
+ *     The callback function failed.
+ */
+int nghttp2_session_on_data_received(nghttp2_session *session,
+                                     nghttp2_frame *frame);
+
+/*
+ * Returns nghttp2_stream* object whose stream ID is |stream_id|.  It
+ * could be NULL if such stream does not exist.  This function returns
+ * NULL if stream is marked as closed.
+ */
+nghttp2_stream *nghttp2_session_get_stream(nghttp2_session *session,
+                                           int32_t stream_id);
+
+/*
+ * This function behaves like nghttp2_session_get_stream(), but it
+ * returns stream object even if it is marked as closed or in
+ * NGHTTP2_STREAM_IDLE state.
+ */
+nghttp2_stream *nghttp2_session_get_stream_raw(nghttp2_session *session,
+                                               int32_t stream_id);
+
+/*
+ * Packs DATA frame |frame| in wire frame format and stores it in
+ * |bufs|.  Payload will be read using |aux_data->data_prd|.  The
+ * length of payload is at most |datamax| bytes.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_DEFERRED
+ *     The DATA frame is postponed.
+ * NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE
+ *     The read_callback failed (stream error).
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_CALLBACK_FAILURE
+ *     The read_callback failed (session error).
+ */
+int nghttp2_session_pack_data(nghttp2_session *session, nghttp2_bufs *bufs,
+                              size_t datamax, nghttp2_frame *frame,
+                              nghttp2_data_aux_data *aux_data,
+                              nghttp2_stream *stream);
+
+/*
+ * Pops and returns next item to send.  If there is no such item,
+ * returns NULL.  This function takes into account max concurrent
+ * streams.  That means if session->ob_syn has item and max concurrent
+ * streams is reached, the even if other queues contain items, then
+ * this function returns NULL.
+ */
+nghttp2_outbound_item *
+nghttp2_session_pop_next_ob_item(nghttp2_session *session);
+
+/*
+ * Returns next item to send.  If there is no such item, this function
+ * returns NULL.  This function takes into account max concurrent
+ * streams.  That means if session->ob_syn has item and max concurrent
+ * streams is reached, the even if other queues contain items, then
+ * this function returns NULL.
+ */
+nghttp2_outbound_item *
+nghttp2_session_get_next_ob_item(nghttp2_session *session);
+
+/*
+ * Updates local settings with the |iv|. The number of elements in the
+ * array pointed by the |iv| is given by the |niv|.  This function
+ * assumes that the all settings_id member in |iv| are in range 1 to
+ * NGHTTP2_SETTINGS_MAX, inclusive.
+ *
+ * While updating individual stream's local window size, if the window
+ * size becomes strictly larger than NGHTTP2_MAX_WINDOW_SIZE,
+ * RST_STREAM is issued against such a stream.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ */
+int nghttp2_session_update_local_settings(nghttp2_session *session,
+                                          nghttp2_settings_entry *iv,
+                                          size_t niv);
+
+/*
+ * Re-prioritize |stream|. The new priority specification is
+ * |pri_spec|.  Caller must ensure that stream->hd.stream_id !=
+ * pri_spec->stream_id.
+ *
+ * This function does not adjust the number of idle streams.  The
+ * caller should call nghttp2_session_adjust_idle_stream() later.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ */
+int nghttp2_session_reprioritize_stream(nghttp2_session *session,
+                                        nghttp2_stream *stream,
+                                        const nghttp2_priority_spec *pri_spec);
+
+/*
+ * Terminates current |session| with the |error_code|.  The |reason|
+ * is NULL-terminated debug string.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory.
+ * NGHTTP2_ERR_INVALID_ARGUMENT
+ *     The |reason| is too long.
+ */
+int nghttp2_session_terminate_session_with_reason(nghttp2_session *session,
+                                                  uint32_t error_code,
+                                                  const char *reason);
+
+#endif /* NGHTTP2_SESSION_H */

lib/nghttp2_stream.c

@@ -0,0 +1,1001 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_stream.h"
+
+#include <assert.h>
+#include <stdio.h>
+
+#include "nghttp2_session.h"
+#include "nghttp2_helper.h"
+#include "nghttp2_debug.h"
+#include "nghttp2_frame.h"
+
+/* Maximum distance between any two stream's cycle in the same
+   prirority queue.  Imagine stream A's cycle is A, and stream B's
+   cycle is B, and A < B.  The cycle is unsigned 32 bit integer, it
+   may get overflow.  Because of how we calculate the next cycle
+   value, if B - A is less than or equals to
+   NGHTTP2_MAX_CYCLE_DISTANCE, A and B are in the same scale, in other
+   words, B is really greater than or equal to A.  Otherwise, A is a
+   result of overflow, and it is actually A > B if we consider that
+   fact. */
+#define NGHTTP2_MAX_CYCLE_DISTANCE                                             \
+  ((uint64_t)NGHTTP2_MAX_FRAME_SIZE_MAX * 256 + 255)
+
+static int stream_less(const void *lhsx, const void *rhsx) {
+  const nghttp2_stream *lhs, *rhs;
+
+  lhs = nghttp2_struct_of(lhsx, nghttp2_stream, pq_entry);
+  rhs = nghttp2_struct_of(rhsx, nghttp2_stream, pq_entry);
+
+  if (lhs->cycle == rhs->cycle) {
+    return lhs->seq < rhs->seq;
+  }
+
+  return rhs->cycle - lhs->cycle <= NGHTTP2_MAX_CYCLE_DISTANCE;
+}
+
+void nghttp2_stream_init(nghttp2_stream *stream, int32_t stream_id,
+                         uint8_t flags, nghttp2_stream_state initial_state,
+                         int32_t weight, int32_t remote_initial_window_size,
+                         int32_t local_initial_window_size,
+                         void *stream_user_data, nghttp2_mem *mem) {
+  nghttp2_map_entry_init(&stream->map_entry, (key_type)stream_id);
+  nghttp2_pq_init(&stream->obq, stream_less, mem);
+
+  stream->stream_id = stream_id;
+  stream->flags = flags;
+  stream->state = initial_state;
+  stream->shut_flags = NGHTTP2_SHUT_NONE;
+  stream->stream_user_data = stream_user_data;
+  stream->item = NULL;
+  stream->remote_window_size = remote_initial_window_size;
+  stream->local_window_size = local_initial_window_size;
+  stream->recv_window_size = 0;
+  stream->consumed_size = 0;
+  stream->recv_reduction = 0;
+  stream->window_update_queued = 0;
+
+  stream->dep_prev = NULL;
+  stream->dep_next = NULL;
+  stream->sib_prev = NULL;
+  stream->sib_next = NULL;
+
+  stream->closed_prev = NULL;
+  stream->closed_next = NULL;
+
+  stream->weight = weight;
+  stream->sum_dep_weight = 0;
+
+  stream->http_flags = NGHTTP2_HTTP_FLAG_NONE;
+  stream->content_length = -1;
+  stream->recv_content_length = 0;
+  stream->status_code = -1;
+
+  stream->queued = 0;
+  stream->descendant_last_cycle = 0;
+  stream->cycle = 0;
+  stream->pending_penalty = 0;
+  stream->descendant_next_seq = 0;
+  stream->seq = 0;
+  stream->last_writelen = 0;
+}
+
+void nghttp2_stream_free(nghttp2_stream *stream) {
+  nghttp2_pq_free(&stream->obq);
+  /* We don't free stream->item.  If it is assigned to aob, then
+     active_outbound_item_reset() will delete it.  Otherwise,
+     nghttp2_stream_close() or session_del() will delete it. */
+}
+
+void nghttp2_stream_shutdown(nghttp2_stream *stream, nghttp2_shut_flag flag) {
+  stream->shut_flags = (uint8_t)(stream->shut_flags | flag);
+}
+
+/*
+ * Returns nonzero if |stream| is active.  This function does not take
+ * into account its descendants.
+ */
+static int stream_active(nghttp2_stream *stream) {
+  return stream->item &&
+         (stream->flags & NGHTTP2_STREAM_FLAG_DEFERRED_ALL) == 0;
+}
+
+/*
+ * Returns nonzero if |stream| or one of its descendants is active
+ */
+static int stream_subtree_active(nghttp2_stream *stream) {
+  return stream_active(stream) || !nghttp2_pq_empty(&stream->obq);
+}
+
+/*
+ * Returns next cycle for |stream|.
+ */
+static void stream_next_cycle(nghttp2_stream *stream, uint64_t last_cycle) {
+  uint64_t penalty;
+
+  penalty = (uint64_t)stream->last_writelen * NGHTTP2_MAX_WEIGHT +
+            stream->pending_penalty;
+
+  stream->cycle = last_cycle + penalty / (uint32_t)stream->weight;
+  stream->pending_penalty = (uint32_t)(penalty % (uint32_t)stream->weight);
+}
+
+static int stream_obq_push(nghttp2_stream *dep_stream, nghttp2_stream *stream) {
+  int rv;
+
+  for (; dep_stream && !stream->queued;
+       stream = dep_stream, dep_stream = dep_stream->dep_prev) {
+    stream_next_cycle(stream, dep_stream->descendant_last_cycle);
+    stream->seq = dep_stream->descendant_next_seq++;
+
+    DEBUGF("stream: stream=%d obq push cycle=%lu\n", stream->stream_id,
+           stream->cycle);
+
+    DEBUGF("stream: push stream %d to stream %d\n", stream->stream_id,
+           dep_stream->stream_id);
+
+    rv = nghttp2_pq_push(&dep_stream->obq, &stream->pq_entry);
+    if (rv != 0) {
+      return rv;
+    }
+    stream->queued = 1;
+  }
+
+  return 0;
+}
+
+/*
+ * Removes |stream| from parent's obq.  If removal of |stream| makes
+ * parent's obq empty, and parent is not active, then parent is also
+ * removed.  This process is repeated recursively.
+ */
+static void stream_obq_remove(nghttp2_stream *stream) {
+  nghttp2_stream *dep_stream;
+
+  dep_stream = stream->dep_prev;
+
+  if (!stream->queued) {
+    return;
+  }
+
+  for (; dep_stream; stream = dep_stream, dep_stream = dep_stream->dep_prev) {
+    DEBUGF("stream: remove stream %d from stream %d\n", stream->stream_id,
+           dep_stream->stream_id);
+
+    nghttp2_pq_remove(&dep_stream->obq, &stream->pq_entry);
+
+    assert(stream->queued);
+
+    stream->queued = 0;
+    stream->cycle = 0;
+    stream->pending_penalty = 0;
+    stream->descendant_last_cycle = 0;
+    stream->last_writelen = 0;
+
+    if (stream_subtree_active(dep_stream)) {
+      return;
+    }
+  }
+}
+
+/*
+ * Moves |stream| from |src|'s obq to |dest|'s obq.  Removal from
+ * |src|'s obq is just done calling nghttp2_pq_remove(), so it does
+ * not recursively remove |src| and ancestors, like
+ * stream_obq_remove().
+ */
+static int stream_obq_move(nghttp2_stream *dest, nghttp2_stream *src,
+                           nghttp2_stream *stream) {
+  if (!stream->queued) {
+    return 0;
+  }
+
+  DEBUGF("stream: remove stream %d from stream %d (move)\n", stream->stream_id,
+         src->stream_id);
+
+  nghttp2_pq_remove(&src->obq, &stream->pq_entry);
+  stream->queued = 0;
+
+  return stream_obq_push(dest, stream);
+}
+
+void nghttp2_stream_reschedule(nghttp2_stream *stream) {
+  nghttp2_stream *dep_stream;
+
+  assert(stream->queued);
+
+  dep_stream = stream->dep_prev;
+
+  for (; dep_stream; stream = dep_stream, dep_stream = dep_stream->dep_prev) {
+    nghttp2_pq_remove(&dep_stream->obq, &stream->pq_entry);
+
+    stream_next_cycle(stream, dep_stream->descendant_last_cycle);
+    stream->seq = dep_stream->descendant_next_seq++;
+
+    nghttp2_pq_push(&dep_stream->obq, &stream->pq_entry);
+
+    DEBUGF("stream: stream=%d obq resched cycle=%lu\n", stream->stream_id,
+           stream->cycle);
+
+    dep_stream->last_writelen = stream->last_writelen;
+  }
+}
+
+void nghttp2_stream_change_weight(nghttp2_stream *stream, int32_t weight) {
+  nghttp2_stream *dep_stream;
+  uint64_t last_cycle;
+  int32_t old_weight;
+  uint64_t wlen_penalty;
+
+  if (stream->weight == weight) {
+    return;
+  }
+
+  old_weight = stream->weight;
+  stream->weight = weight;
+
+  dep_stream = stream->dep_prev;
+
+  if (!dep_stream) {
+    return;
+  }
+
+  dep_stream->sum_dep_weight += weight - old_weight;
+
+  if (!stream->queued) {
+    return;
+  }
+
+  nghttp2_pq_remove(&dep_stream->obq, &stream->pq_entry);
+
+  wlen_penalty = (uint64_t)stream->last_writelen * NGHTTP2_MAX_WEIGHT;
+
+  /* Compute old stream->pending_penalty we used to calculate
+     stream->cycle */
+  stream->pending_penalty =
+      (uint32_t)((stream->pending_penalty + (uint32_t)old_weight -
+                  (wlen_penalty % (uint32_t)old_weight)) %
+                 (uint32_t)old_weight);
+
+  last_cycle = stream->cycle -
+               (wlen_penalty + stream->pending_penalty) / (uint32_t)old_weight;
+
+  /* Now we have old stream->pending_penalty and new stream->weight in
+     place */
+  stream_next_cycle(stream, last_cycle);
+
+  if (dep_stream->descendant_last_cycle - stream->cycle <=
+      NGHTTP2_MAX_CYCLE_DISTANCE) {
+    stream->cycle = dep_stream->descendant_last_cycle;
+  }
+
+  /* Continue to use same stream->seq */
+
+  nghttp2_pq_push(&dep_stream->obq, &stream->pq_entry);
+
+  DEBUGF("stream: stream=%d obq resched cycle=%lu\n", stream->stream_id,
+         stream->cycle);
+}
+
+static nghttp2_stream *stream_last_sib(nghttp2_stream *stream) {
+  for (; stream->sib_next; stream = stream->sib_next)
+    ;
+
+  return stream;
+}
+
+int32_t nghttp2_stream_dep_distributed_weight(nghttp2_stream *stream,
+                                              int32_t weight) {
+  weight = stream->weight * weight / stream->sum_dep_weight;
+
+  return nghttp2_max(1, weight);
+}
+
+#ifdef STREAM_DEP_DEBUG
+
+static void ensure_inactive(nghttp2_stream *stream) {
+  nghttp2_stream *si;
+
+  if (stream->queued) {
+    fprintf(stderr, "stream(%p)=%d, stream->queued = 1; want 0\n", stream,
+            stream->stream_id);
+    assert(0);
+  }
+
+  if (stream_active(stream)) {
+    fprintf(stderr, "stream(%p)=%d, stream_active(stream) = 1; want 0\n",
+            stream, stream->stream_id);
+    assert(0);
+  }
+
+  if (!nghttp2_pq_empty(&stream->obq)) {
+    fprintf(stderr, "stream(%p)=%d, nghttp2_pq_size() = %zu; want 0\n", stream,
+            stream->stream_id, nghttp2_pq_size(&stream->obq));
+    assert(0);
+  }
+
+  for (si = stream->dep_next; si; si = si->sib_next) {
+    ensure_inactive(si);
+  }
+}
+
+static void check_queued(nghttp2_stream *stream) {
+  nghttp2_stream *si;
+  int queued;
+
+  if (stream->queued) {
+    if (!stream_subtree_active(stream)) {
+      fprintf(stderr,
+              "stream(%p)=%d, stream->queued == 1, but "
+              "stream_active() == %d and nghttp2_pq_size(&stream->obq) = %zu\n",
+              stream, stream->stream_id, stream_active(stream),
+              nghttp2_pq_size(&stream->obq));
+      assert(0);
+    }
+    if (!stream_active(stream)) {
+      queued = 0;
+      for (si = stream->dep_next; si; si = si->sib_next) {
+        if (si->queued) {
+          ++queued;
+        }
+      }
+      if (queued == 0) {
+        fprintf(stderr,
+                "stream(%p)=%d, stream->queued == 1, and "
+                "!stream_active(), but no descendants is queued\n",
+                stream, stream->stream_id);
+        assert(0);
+      }
+    }
+
+    for (si = stream->dep_next; si; si = si->sib_next) {
+      check_queued(si);
+    }
+  } else {
+    if (stream_active(stream) || !nghttp2_pq_empty(&stream->obq)) {
+      fprintf(stderr,
+              "stream(%p) = %d, stream->queued == 0, but "
+              "stream_active(stream) == %d and "
+              "nghttp2_pq_size(&stream->obq) = %zu\n",
+              stream, stream->stream_id, stream_active(stream),
+              nghttp2_pq_size(&stream->obq));
+      assert(0);
+    }
+    for (si = stream->dep_next; si; si = si->sib_next) {
+      ensure_inactive(si);
+    }
+  }
+}
+
+static void check_sum_dep(nghttp2_stream *stream) {
+  nghttp2_stream *si;
+  int32_t n = 0;
+  for (si = stream->dep_next; si; si = si->sib_next) {
+    n += si->weight;
+  }
+  if (n != stream->sum_dep_weight) {
+    fprintf(stderr, "stream(%p)=%d, sum_dep_weight = %d; want %d\n", stream,
+            stream->stream_id, n, stream->sum_dep_weight);
+    assert(0);
+  }
+  for (si = stream->dep_next; si; si = si->sib_next) {
+    check_sum_dep(si);
+  }
+}
+
+static void check_dep_prev(nghttp2_stream *stream) {
+  nghttp2_stream *si;
+  for (si = stream->dep_next; si; si = si->sib_next) {
+    if (si->dep_prev != stream) {
+      fprintf(stderr, "si->dep_prev = %p; want %p\n", si->dep_prev, stream);
+      assert(0);
+    }
+    check_dep_prev(si);
+  }
+}
+
+#endif /* STREAM_DEP_DEBUG */
+
+#ifdef STREAM_DEP_DEBUG
+static void validate_tree(nghttp2_stream *stream) {
+  nghttp2_stream *si;
+
+  if (!stream) {
+    return;
+  }
+
+  for (; stream->dep_prev; stream = stream->dep_prev)
+    ;
+
+  assert(stream->stream_id == 0);
+  assert(!stream->queued);
+
+  fprintf(stderr, "checking...\n");
+  if (nghttp2_pq_empty(&stream->obq)) {
+    fprintf(stderr, "root obq empty\n");
+    for (si = stream->dep_next; si; si = si->sib_next) {
+      ensure_inactive(si);
+    }
+  } else {
+    for (si = stream->dep_next; si; si = si->sib_next) {
+      check_queued(si);
+    }
+  }
+
+  check_sum_dep(stream);
+  check_dep_prev(stream);
+}
+#else  /* !STREAM_DEP_DEBUG */
+static void validate_tree(nghttp2_stream *stream) { (void)stream; }
+#endif /* !STREAM_DEP_DEBUG*/
+
+static int stream_update_dep_on_attach_item(nghttp2_stream *stream) {
+  int rv;
+
+  rv = stream_obq_push(stream->dep_prev, stream);
+  if (rv != 0) {
+    return rv;
+  }
+
+  validate_tree(stream);
+  return 0;
+}
+
+static int stream_update_dep_on_detach_item(nghttp2_stream *stream) {
+  if (nghttp2_pq_empty(&stream->obq)) {
+    stream_obq_remove(stream);
+  }
+
+  validate_tree(stream);
+
+  return 0;
+}
+
+int nghttp2_stream_attach_item(nghttp2_stream *stream,
+                               nghttp2_outbound_item *item) {
+  int rv;
+
+  assert((stream->flags & NGHTTP2_STREAM_FLAG_DEFERRED_ALL) == 0);
+  assert(stream->item == NULL);
+
+  DEBUGF("stream: stream=%d attach item=%p\n", stream->stream_id, item);
+
+  stream->item = item;
+
+  rv = stream_update_dep_on_attach_item(stream);
+  if (rv != 0) {
+    /* This may relave stream->queued == 1, but stream->item == NULL.
+       But only consequence of this error is fatal one, and session
+       destruction.  In that execution path, these inconsistency does
+       not matter. */
+    stream->item = NULL;
+    return rv;
+  }
+
+  return 0;
+}
+
+int nghttp2_stream_detach_item(nghttp2_stream *stream) {
+  DEBUGF("stream: stream=%d detach item=%p\n", stream->stream_id, stream->item);
+
+  stream->item = NULL;
+  stream->flags = (uint8_t)(stream->flags & ~NGHTTP2_STREAM_FLAG_DEFERRED_ALL);
+
+  return stream_update_dep_on_detach_item(stream);
+}
+
+int nghttp2_stream_defer_item(nghttp2_stream *stream, uint8_t flags) {
+  assert(stream->item);
+
+  DEBUGF("stream: stream=%d defer item=%p cause=%02x\n", stream->stream_id,
+         stream->item, flags);
+
+  stream->flags |= flags;
+
+  return stream_update_dep_on_detach_item(stream);
+}
+
+int nghttp2_stream_resume_deferred_item(nghttp2_stream *stream, uint8_t flags) {
+  assert(stream->item);
+
+  DEBUGF("stream: stream=%d resume item=%p flags=%02x\n", stream->stream_id,
+         stream->item, flags);
+
+  stream->flags = (uint8_t)(stream->flags & ~flags);
+
+  if (stream->flags & NGHTTP2_STREAM_FLAG_DEFERRED_ALL) {
+    return 0;
+  }
+
+  return stream_update_dep_on_attach_item(stream);
+}
+
+int nghttp2_stream_check_deferred_item(nghttp2_stream *stream) {
+  return stream->item && (stream->flags & NGHTTP2_STREAM_FLAG_DEFERRED_ALL);
+}
+
+int nghttp2_stream_check_deferred_by_flow_control(nghttp2_stream *stream) {
+  return stream->item &&
+         (stream->flags & NGHTTP2_STREAM_FLAG_DEFERRED_FLOW_CONTROL);
+}
+
+static int update_initial_window_size(int32_t *window_size_ptr,
+                                      int32_t new_initial_window_size,
+                                      int32_t old_initial_window_size) {
+  int64_t new_window_size = (int64_t)(*window_size_ptr) +
+                            new_initial_window_size - old_initial_window_size;
+  if (INT32_MIN > new_window_size ||
+      new_window_size > NGHTTP2_MAX_WINDOW_SIZE) {
+    return -1;
+  }
+  *window_size_ptr = (int32_t)new_window_size;
+  return 0;
+}
+
+int nghttp2_stream_update_remote_initial_window_size(
+    nghttp2_stream *stream, int32_t new_initial_window_size,
+    int32_t old_initial_window_size) {
+  return update_initial_window_size(&stream->remote_window_size,
+                                    new_initial_window_size,
+                                    old_initial_window_size);
+}
+
+int nghttp2_stream_update_local_initial_window_size(
+    nghttp2_stream *stream, int32_t new_initial_window_size,
+    int32_t old_initial_window_size) {
+  return update_initial_window_size(&stream->local_window_size,
+                                    new_initial_window_size,
+                                    old_initial_window_size);
+}
+
+void nghttp2_stream_promise_fulfilled(nghttp2_stream *stream) {
+  stream->state = NGHTTP2_STREAM_OPENED;
+  stream->flags = (uint8_t)(stream->flags & ~NGHTTP2_STREAM_FLAG_PUSH);
+}
+
+int nghttp2_stream_dep_find_ancestor(nghttp2_stream *stream,
+                                     nghttp2_stream *target) {
+  for (; stream; stream = stream->dep_prev) {
+    if (stream == target) {
+      return 1;
+    }
+  }
+  return 0;
+}
+
+int nghttp2_stream_dep_insert(nghttp2_stream *dep_stream,
+                              nghttp2_stream *stream) {
+  nghttp2_stream *si;
+  int rv;
+
+  DEBUGF("stream: dep_insert dep_stream(%p)=%d, stream(%p)=%d\n", dep_stream,
+         dep_stream->stream_id, stream, stream->stream_id);
+
+  stream->sum_dep_weight = dep_stream->sum_dep_weight;
+  dep_stream->sum_dep_weight = stream->weight;
+
+  if (dep_stream->dep_next) {
+    for (si = dep_stream->dep_next; si; si = si->sib_next) {
+      si->dep_prev = stream;
+      if (si->queued) {
+        rv = stream_obq_move(stream, dep_stream, si);
+        if (rv != 0) {
+          return rv;
+        }
+      }
+    }
+
+    if (stream_subtree_active(stream)) {
+      rv = stream_obq_push(dep_stream, stream);
+      if (rv != 0) {
+        return rv;
+      }
+    }
+
+    stream->dep_next = dep_stream->dep_next;
+  }
+
+  dep_stream->dep_next = stream;
+  stream->dep_prev = dep_stream;
+
+  validate_tree(stream);
+
+  return 0;
+}
+
+static void set_dep_prev(nghttp2_stream *stream, nghttp2_stream *dep) {
+  for (; stream; stream = stream->sib_next) {
+    stream->dep_prev = dep;
+  }
+}
+
+static void link_dep(nghttp2_stream *dep_stream, nghttp2_stream *stream) {
+  dep_stream->dep_next = stream;
+  if (stream) {
+    stream->dep_prev = dep_stream;
+  }
+}
+
+static void link_sib(nghttp2_stream *a, nghttp2_stream *b) {
+  a->sib_next = b;
+  if (b) {
+    b->sib_prev = a;
+  }
+}
+
+static void insert_link_dep(nghttp2_stream *dep_stream,
+                            nghttp2_stream *stream) {
+  nghttp2_stream *sib_next;
+
+  assert(stream->sib_prev == NULL);
+
+  sib_next = dep_stream->dep_next;
+
+  link_sib(stream, sib_next);
+
+  link_dep(dep_stream, stream);
+}
+
+static void unlink_sib(nghttp2_stream *stream) {
+  nghttp2_stream *prev, *next, *dep_next;
+
+  prev = stream->sib_prev;
+  dep_next = stream->dep_next;
+
+  assert(prev);
+
+  if (dep_next) {
+    /*
+     *  prev--stream(--sib_next--...)
+     *         |
+     *        dep_next
+     */
+
+    link_sib(prev, dep_next);
+
+    set_dep_prev(dep_next, stream->dep_prev);
+
+    if (stream->sib_next) {
+      link_sib(stream_last_sib(dep_next), stream->sib_next);
+    }
+  } else {
+    /*
+     *  prev--stream(--sib_next--...)
+     */
+    next = stream->sib_next;
+
+    prev->sib_next = next;
+
+    if (next) {
+      next->sib_prev = prev;
+    }
+  }
+}
+
+static void unlink_dep(nghttp2_stream *stream) {
+  nghttp2_stream *prev, *next, *dep_next;
+
+  prev = stream->dep_prev;
+  dep_next = stream->dep_next;
+
+  assert(prev);
+
+  if (dep_next) {
+    /*
+     * prev
+     *   |
+     * stream(--sib_next--...)
+     *   |
+     * dep_next
+     */
+    link_dep(prev, dep_next);
+
+    set_dep_prev(dep_next, stream->dep_prev);
+
+    if (stream->sib_next) {
+      link_sib(stream_last_sib(dep_next), stream->sib_next);
+    }
+
+  } else if (stream->sib_next) {
+    /*
+     * prev
+     *   |
+     * stream--sib_next
+     */
+    next = stream->sib_next;
+
+    next->sib_prev = NULL;
+
+    link_dep(prev, next);
+  } else {
+    prev->dep_next = NULL;
+  }
+}
+
+void nghttp2_stream_dep_add(nghttp2_stream *dep_stream,
+                            nghttp2_stream *stream) {
+  DEBUGF("stream: dep_add dep_stream(%p)=%d, stream(%p)=%d\n", dep_stream,
+         dep_stream->stream_id, stream, stream->stream_id);
+
+  dep_stream->sum_dep_weight += stream->weight;
+
+  if (dep_stream->dep_next == NULL) {
+    link_dep(dep_stream, stream);
+  } else {
+    insert_link_dep(dep_stream, stream);
+  }
+
+  validate_tree(stream);
+}
+
+int nghttp2_stream_dep_remove(nghttp2_stream *stream) {
+  nghttp2_stream *dep_prev, *si;
+  int32_t sum_dep_weight_delta;
+  int rv;
+
+  DEBUGF("stream: dep_remove stream(%p)=%d\n", stream, stream->stream_id);
+
+  /* Distribute weight of |stream| to direct descendants */
+  sum_dep_weight_delta = -stream->weight;
+
+  for (si = stream->dep_next; si; si = si->sib_next) {
+    si->weight = nghttp2_stream_dep_distributed_weight(stream, si->weight);
+
+    sum_dep_weight_delta += si->weight;
+
+    if (si->queued) {
+      rv = stream_obq_move(stream->dep_prev, stream, si);
+      if (rv != 0) {
+        return rv;
+      }
+    }
+  }
+
+  assert(stream->dep_prev);
+
+  dep_prev = stream->dep_prev;
+
+  dep_prev->sum_dep_weight += sum_dep_weight_delta;
+
+  if (stream->queued) {
+    stream_obq_remove(stream);
+  }
+
+  if (stream->sib_prev) {
+    unlink_sib(stream);
+  } else {
+    unlink_dep(stream);
+  }
+
+  stream->sum_dep_weight = 0;
+
+  stream->dep_prev = NULL;
+  stream->dep_next = NULL;
+  stream->sib_prev = NULL;
+  stream->sib_next = NULL;
+
+  validate_tree(dep_prev);
+
+  return 0;
+}
+
+int nghttp2_stream_dep_insert_subtree(nghttp2_stream *dep_stream,
+                                      nghttp2_stream *stream) {
+  nghttp2_stream *last_sib;
+  nghttp2_stream *dep_next;
+  nghttp2_stream *si;
+  int rv;
+
+  DEBUGF("stream: dep_insert_subtree dep_stream(%p)=%d stream(%p)=%d\n",
+         dep_stream, dep_stream->stream_id, stream, stream->stream_id);
+
+  stream->sum_dep_weight += dep_stream->sum_dep_weight;
+  dep_stream->sum_dep_weight = stream->weight;
+
+  if (dep_stream->dep_next) {
+    dep_next = dep_stream->dep_next;
+
+    link_dep(dep_stream, stream);
+
+    if (stream->dep_next) {
+      last_sib = stream_last_sib(stream->dep_next);
+
+      link_sib(last_sib, dep_next);
+    } else {
+      link_dep(stream, dep_next);
+    }
+
+    for (si = dep_next; si; si = si->sib_next) {
+      si->dep_prev = stream;
+      if (si->queued) {
+        rv = stream_obq_move(stream, dep_stream, si);
+        if (rv != 0) {
+          return rv;
+        }
+      }
+    }
+  } else {
+    link_dep(dep_stream, stream);
+  }
+
+  if (stream_subtree_active(stream)) {
+    rv = stream_obq_push(dep_stream, stream);
+    if (rv != 0) {
+      return rv;
+    }
+  }
+
+  validate_tree(dep_stream);
+
+  return 0;
+}
+
+int nghttp2_stream_dep_add_subtree(nghttp2_stream *dep_stream,
+                                   nghttp2_stream *stream) {
+  int rv;
+
+  DEBUGF("stream: dep_add_subtree dep_stream(%p)=%d stream(%p)=%d\n",
+         dep_stream, dep_stream->stream_id, stream, stream->stream_id);
+
+  dep_stream->sum_dep_weight += stream->weight;
+
+  if (dep_stream->dep_next) {
+    insert_link_dep(dep_stream, stream);
+  } else {
+    link_dep(dep_stream, stream);
+  }
+
+  if (stream_subtree_active(stream)) {
+    rv = stream_obq_push(dep_stream, stream);
+    if (rv != 0) {
+      return rv;
+    }
+  }
+
+  validate_tree(dep_stream);
+
+  return 0;
+}
+
+void nghttp2_stream_dep_remove_subtree(nghttp2_stream *stream) {
+  nghttp2_stream *next, *dep_prev;
+
+  DEBUGF("stream: dep_remove_subtree stream(%p)=%d\n", stream,
+         stream->stream_id);
+
+  assert(stream->dep_prev);
+
+  dep_prev = stream->dep_prev;
+
+  if (stream->sib_prev) {
+    link_sib(stream->sib_prev, stream->sib_next);
+  } else {
+    next = stream->sib_next;
+
+    link_dep(dep_prev, next);
+
+    if (next) {
+      next->sib_prev = NULL;
+    }
+  }
+
+  dep_prev->sum_dep_weight -= stream->weight;
+
+  if (stream->queued) {
+    stream_obq_remove(stream);
+  }
+
+  validate_tree(dep_prev);
+
+  stream->sib_prev = NULL;
+  stream->sib_next = NULL;
+  stream->dep_prev = NULL;
+}
+
+int nghttp2_stream_in_dep_tree(nghttp2_stream *stream) {
+  return stream->dep_prev || stream->dep_next || stream->sib_prev ||
+         stream->sib_next;
+}
+
+nghttp2_outbound_item *
+nghttp2_stream_next_outbound_item(nghttp2_stream *stream) {
+  nghttp2_pq_entry *ent;
+  nghttp2_stream *si;
+
+  for (;;) {
+    if (stream_active(stream)) {
+      /* Update ascendant's descendant_last_cycle here, so that we can
+         assure that new stream is scheduled based on it. */
+      for (si = stream; si->dep_prev; si = si->dep_prev) {
+        si->dep_prev->descendant_last_cycle = si->cycle;
+      }
+      return stream->item;
+    }
+    ent = nghttp2_pq_top(&stream->obq);
+    if (!ent) {
+      return NULL;
+    }
+    stream = nghttp2_struct_of(ent, nghttp2_stream, pq_entry);
+  }
+}
+
+nghttp2_stream_proto_state nghttp2_stream_get_state(nghttp2_stream *stream) {
+  if (stream->flags & NGHTTP2_STREAM_FLAG_CLOSED) {
+    return NGHTTP2_STREAM_STATE_CLOSED;
+  }
+
+  if (stream->flags & NGHTTP2_STREAM_FLAG_PUSH) {
+    if (stream->shut_flags & NGHTTP2_SHUT_RD) {
+      return NGHTTP2_STREAM_STATE_RESERVED_LOCAL;
+    }
+
+    if (stream->shut_flags & NGHTTP2_SHUT_WR) {
+      return NGHTTP2_STREAM_STATE_RESERVED_REMOTE;
+    }
+  }
+
+  if (stream->shut_flags & NGHTTP2_SHUT_RD) {
+    return NGHTTP2_STREAM_STATE_HALF_CLOSED_REMOTE;
+  }
+
+  if (stream->shut_flags & NGHTTP2_SHUT_WR) {
+    return NGHTTP2_STREAM_STATE_HALF_CLOSED_LOCAL;
+  }
+
+  if (stream->state == NGHTTP2_STREAM_IDLE) {
+    return NGHTTP2_STREAM_STATE_IDLE;
+  }
+
+  return NGHTTP2_STREAM_STATE_OPEN;
+}
+
+nghttp2_stream *nghttp2_stream_get_parent(nghttp2_stream *stream) {
+  return stream->dep_prev;
+}
+
+nghttp2_stream *nghttp2_stream_get_next_sibling(nghttp2_stream *stream) {
+  return stream->sib_next;
+}
+
+nghttp2_stream *nghttp2_stream_get_previous_sibling(nghttp2_stream *stream) {
+  return stream->sib_prev;
+}
+
+nghttp2_stream *nghttp2_stream_get_first_child(nghttp2_stream *stream) {
+  return stream->dep_next;
+}
+
+int32_t nghttp2_stream_get_weight(nghttp2_stream *stream) {
+  return stream->weight;
+}
+
+int32_t nghttp2_stream_get_sum_dependency_weight(nghttp2_stream *stream) {
+  return stream->sum_dep_weight;
+}
+
+int32_t nghttp2_stream_get_stream_id(nghttp2_stream *stream) {
+  return stream->stream_id;
+}

lib/nghttp2_stream.h

@@ -0,0 +1,437 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_STREAM_H
+#define NGHTTP2_STREAM_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+#include "nghttp2_outbound_item.h"
+#include "nghttp2_map.h"
+#include "nghttp2_pq.h"
+#include "nghttp2_int.h"
+
+/*
+ * If local peer is stream initiator:
+ * NGHTTP2_STREAM_OPENING : upon sending request HEADERS
+ * NGHTTP2_STREAM_OPENED : upon receiving response HEADERS
+ * NGHTTP2_STREAM_CLOSING : upon queuing RST_STREAM
+ *
+ * If remote peer is stream initiator:
+ * NGHTTP2_STREAM_OPENING : upon receiving request HEADERS
+ * NGHTTP2_STREAM_OPENED : upon sending response HEADERS
+ * NGHTTP2_STREAM_CLOSING : upon queuing RST_STREAM
+ */
+typedef enum {
+  /* Initial state */
+  NGHTTP2_STREAM_INITIAL,
+  /* For stream initiator: request HEADERS has been sent, but response
+     HEADERS has not been received yet.  For receiver: request HEADERS
+     has been received, but it does not send response HEADERS yet. */
+  NGHTTP2_STREAM_OPENING,
+  /* For stream initiator: response HEADERS is received. For receiver:
+     response HEADERS is sent. */
+  NGHTTP2_STREAM_OPENED,
+  /* RST_STREAM is received, but somehow we need to keep stream in
+     memory. */
+  NGHTTP2_STREAM_CLOSING,
+  /* PUSH_PROMISE is received or sent */
+  NGHTTP2_STREAM_RESERVED,
+  /* Stream is created in this state if it is used as anchor in
+     dependency tree. */
+  NGHTTP2_STREAM_IDLE
+} nghttp2_stream_state;
+
+typedef enum {
+  NGHTTP2_SHUT_NONE = 0,
+  /* Indicates further receptions will be disallowed. */
+  NGHTTP2_SHUT_RD = 0x01,
+  /* Indicates further transmissions will be disallowed. */
+  NGHTTP2_SHUT_WR = 0x02,
+  /* Indicates both further receptions and transmissions will be
+     disallowed. */
+  NGHTTP2_SHUT_RDWR = NGHTTP2_SHUT_RD | NGHTTP2_SHUT_WR
+} nghttp2_shut_flag;
+
+typedef enum {
+  NGHTTP2_STREAM_FLAG_NONE = 0,
+  /* Indicates that this stream is pushed stream and not opened
+     yet. */
+  NGHTTP2_STREAM_FLAG_PUSH = 0x01,
+  /* Indicates that this stream was closed */
+  NGHTTP2_STREAM_FLAG_CLOSED = 0x02,
+  /* Indicates the item is deferred due to flow control. */
+  NGHTTP2_STREAM_FLAG_DEFERRED_FLOW_CONTROL = 0x04,
+  /* Indicates the item is deferred by user callback */
+  NGHTTP2_STREAM_FLAG_DEFERRED_USER = 0x08,
+  /* bitwise OR of NGHTTP2_STREAM_FLAG_DEFERRED_FLOW_CONTROL and
+     NGHTTP2_STREAM_FLAG_DEFERRED_USER. */
+  NGHTTP2_STREAM_FLAG_DEFERRED_ALL = 0x0c
+
+} nghttp2_stream_flag;
+
+/* HTTP related flags to enforce HTTP semantics */
+typedef enum {
+  NGHTTP2_HTTP_FLAG_NONE = 0,
+  /* header field seen so far */
+  NGHTTP2_HTTP_FLAG__AUTHORITY = 1,
+  NGHTTP2_HTTP_FLAG__PATH = 1 << 1,
+  NGHTTP2_HTTP_FLAG__METHOD = 1 << 2,
+  NGHTTP2_HTTP_FLAG__SCHEME = 1 << 3,
+  /* host is not pseudo header, but we require either host or
+     :authority */
+  NGHTTP2_HTTP_FLAG_HOST = 1 << 4,
+  NGHTTP2_HTTP_FLAG__STATUS = 1 << 5,
+  /* required header fields for HTTP request except for CONNECT
+     method. */
+  NGHTTP2_HTTP_FLAG_REQ_HEADERS = NGHTTP2_HTTP_FLAG__METHOD |
+                                  NGHTTP2_HTTP_FLAG__PATH |
+                                  NGHTTP2_HTTP_FLAG__SCHEME,
+  NGHTTP2_HTTP_FLAG_PSEUDO_HEADER_DISALLOWED = 1 << 6,
+  /* HTTP method flags */
+  NGHTTP2_HTTP_FLAG_METH_CONNECT = 1 << 7,
+  NGHTTP2_HTTP_FLAG_METH_HEAD = 1 << 8,
+  NGHTTP2_HTTP_FLAG_METH_OPTIONS = 1 << 9,
+  NGHTTP2_HTTP_FLAG_METH_UPGRADE_WORKAROUND = 1 << 10,
+  NGHTTP2_HTTP_FLAG_METH_ALL = NGHTTP2_HTTP_FLAG_METH_CONNECT |
+                               NGHTTP2_HTTP_FLAG_METH_HEAD |
+                               NGHTTP2_HTTP_FLAG_METH_OPTIONS |
+                               NGHTTP2_HTTP_FLAG_METH_UPGRADE_WORKAROUND,
+  /* :path category */
+  /* path starts with "/" */
+  NGHTTP2_HTTP_FLAG_PATH_REGULAR = 1 << 11,
+  /* path "*" */
+  NGHTTP2_HTTP_FLAG_PATH_ASTERISK = 1 << 12,
+  /* scheme */
+  /* "http" or "https" scheme */
+  NGHTTP2_HTTP_FLAG_SCHEME_HTTP = 1 << 13,
+  /* set if final response is expected */
+  NGHTTP2_HTTP_FLAG_EXPECT_FINAL_RESPONSE = 1 << 14,
+  NGHTTP2_HTTP_FLAG__PROTOCOL = 1 << 15,
+} nghttp2_http_flag;
+
+struct nghttp2_stream {
+  /* Intrusive Map */
+  nghttp2_map_entry map_entry;
+  /* Entry for dep_prev->obq */
+  nghttp2_pq_entry pq_entry;
+  /* Priority Queue storing direct descendant (nghttp2_stream).  Only
+     streams which itself has some data to send, or has a descendant
+     which has some data to sent. */
+  nghttp2_pq obq;
+  /* Content-Length of request/response body.  -1 if unknown. */
+  int64_t content_length;
+  /* Received body so far */
+  int64_t recv_content_length;
+  /* Base last_cycle for direct descendent streams. */
+  uint64_t descendant_last_cycle;
+  /* Next scheduled time to sent item */
+  uint64_t cycle;
+  /* Next seq used for direct descendant streams */
+  uint64_t descendant_next_seq;
+  /* Secondary key for prioritization to break a tie for cycle.  This
+     value is monotonically increased for single parent stream. */
+  uint64_t seq;
+  /* pointers to form dependency tree.  If multiple streams depend on
+     a stream, only one stream (left most) has non-NULL dep_prev which
+     points to the stream it depends on. The remaining streams are
+     linked using sib_prev and sib_next.  The stream which has
+     non-NULL dep_prev always NULL sib_prev.  The right most stream
+     has NULL sib_next.  If this stream is a root of dependency tree,
+     dep_prev and sib_prev are NULL. */
+  nghttp2_stream *dep_prev, *dep_next;
+  nghttp2_stream *sib_prev, *sib_next;
+  /* When stream is kept after closure, it may be kept in doubly
+     linked list pointed by nghttp2_session closed_stream_head.
+     closed_next points to the next stream object if it is the element
+     of the list. */
+  nghttp2_stream *closed_prev, *closed_next;
+  /* The arbitrary data provided by user for this stream. */
+  void *stream_user_data;
+  /* Item to send */
+  nghttp2_outbound_item *item;
+  /* Last written length of frame payload */
+  size_t last_writelen;
+  /* stream ID */
+  int32_t stream_id;
+  /* Current remote window size. This value is computed against the
+     current initial window size of remote endpoint. */
+  int32_t remote_window_size;
+  /* Keep track of the number of bytes received without
+     WINDOW_UPDATE. This could be negative after submitting negative
+     value to WINDOW_UPDATE */
+  int32_t recv_window_size;
+  /* The number of bytes consumed by the application and now is
+     subject to WINDOW_UPDATE.  This is only used when auto
+     WINDOW_UPDATE is turned off. */
+  int32_t consumed_size;
+  /* The amount of recv_window_size cut using submitting negative
+     value to WINDOW_UPDATE */
+  int32_t recv_reduction;
+  /* window size for local flow control. It is initially set to
+     NGHTTP2_INITIAL_WINDOW_SIZE and could be increased/decreased by
+     submitting WINDOW_UPDATE. See nghttp2_submit_window_update(). */
+  int32_t local_window_size;
+  /* weight of this stream */
+  int32_t weight;
+  /* This is unpaid penalty (offset) when calculating cycle. */
+  uint32_t pending_penalty;
+  /* sum of weight of direct descendants */
+  int32_t sum_dep_weight;
+  nghttp2_stream_state state;
+  /* status code from remote server */
+  int16_t status_code;
+  /* Bitwise OR of zero or more nghttp2_http_flag values */
+  uint16_t http_flags;
+  /* This is bitwise-OR of 0 or more of nghttp2_stream_flag. */
+  uint8_t flags;
+  /* Bitwise OR of zero or more nghttp2_shut_flag values */
+  uint8_t shut_flags;
+  /* Nonzero if this stream has been queued to stream pointed by
+     dep_prev.  We maintain the invariant that if a stream is queued,
+     then its ancestors, except for root, are also queued.  This
+     invariant may break in fatal error condition. */
+  uint8_t queued;
+  /* This flag is used to reduce excessive queuing of WINDOW_UPDATE to
+     this stream.  The nonzero does not necessarily mean WINDOW_UPDATE
+     is not queued. */
+  uint8_t window_update_queued;
+};
+
+void nghttp2_stream_init(nghttp2_stream *stream, int32_t stream_id,
+                         uint8_t flags, nghttp2_stream_state initial_state,
+                         int32_t weight, int32_t remote_initial_window_size,
+                         int32_t local_initial_window_size,
+                         void *stream_user_data, nghttp2_mem *mem);
+
+void nghttp2_stream_free(nghttp2_stream *stream);
+
+/*
+ * Disallow either further receptions or transmissions, or both.
+ * |flag| is bitwise OR of one or more of nghttp2_shut_flag.
+ */
+void nghttp2_stream_shutdown(nghttp2_stream *stream, nghttp2_shut_flag flag);
+
+/*
+ * Defer |stream->item|.  We won't call this function in the situation
+ * where |stream->item| == NULL.  The |flags| is bitwise OR of zero or
+ * more of NGHTTP2_STREAM_FLAG_DEFERRED_USER and
+ * NGHTTP2_STREAM_FLAG_DEFERRED_FLOW_CONTROL.  The |flags| indicates
+ * the reason of this action.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ */
+int nghttp2_stream_defer_item(nghttp2_stream *stream, uint8_t flags);
+
+/*
+ * Put back deferred data in this stream to active state.  The |flags|
+ * are one or more of bitwise OR of the following values:
+ * NGHTTP2_STREAM_FLAG_DEFERRED_USER and
+ * NGHTTP2_STREAM_FLAG_DEFERRED_FLOW_CONTROL and given masks are
+ * cleared if they are set.  So even if this function is called, if
+ * one of flag is still set, data does not become active.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ */
+int nghttp2_stream_resume_deferred_item(nghttp2_stream *stream, uint8_t flags);
+
+/*
+ * Returns nonzero if item is deferred by whatever reason.
+ */
+int nghttp2_stream_check_deferred_item(nghttp2_stream *stream);
+
+/*
+ * Returns nonzero if item is deferred by flow control.
+ */
+int nghttp2_stream_check_deferred_by_flow_control(nghttp2_stream *stream);
+
+/*
+ * Updates the remote window size with the new value
+ * |new_initial_window_size|. The |old_initial_window_size| is used to
+ * calculate the current window size.
+ *
+ * This function returns 0 if it succeeds or -1. The failure is due to
+ * overflow.
+ */
+int nghttp2_stream_update_remote_initial_window_size(
+    nghttp2_stream *stream, int32_t new_initial_window_size,
+    int32_t old_initial_window_size);
+
+/*
+ * Updates the local window size with the new value
+ * |new_initial_window_size|. The |old_initial_window_size| is used to
+ * calculate the current window size.
+ *
+ * This function returns 0 if it succeeds or -1. The failure is due to
+ * overflow.
+ */
+int nghttp2_stream_update_local_initial_window_size(
+    nghttp2_stream *stream, int32_t new_initial_window_size,
+    int32_t old_initial_window_size);
+
+/*
+ * Call this function if promised stream |stream| is replied with
+ * HEADERS.  This function makes the state of the |stream| to
+ * NGHTTP2_STREAM_OPENED.
+ */
+void nghttp2_stream_promise_fulfilled(nghttp2_stream *stream);
+
+/*
+ * Returns nonzero if |target| is an ancestor of |stream|.
+ */
+int nghttp2_stream_dep_find_ancestor(nghttp2_stream *stream,
+                                     nghttp2_stream *target);
+
+/*
+ * Computes distributed weight of a stream of the |weight| under the
+ * |stream| if |stream| is removed from a dependency tree.
+ */
+int32_t nghttp2_stream_dep_distributed_weight(nghttp2_stream *stream,
+                                              int32_t weight);
+
+/*
+ * Makes the |stream| depend on the |dep_stream|.  This dependency is
+ * exclusive.  All existing direct descendants of |dep_stream| become
+ * the descendants of the |stream|.  This function assumes
+ * |stream->item| is NULL.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ */
+int nghttp2_stream_dep_insert(nghttp2_stream *dep_stream,
+                              nghttp2_stream *stream);
+
+/*
+ * Makes the |stream| depend on the |dep_stream|.  This dependency is
+ * not exclusive.  This function assumes |stream->item| is NULL.
+ */
+void nghttp2_stream_dep_add(nghttp2_stream *dep_stream, nghttp2_stream *stream);
+
+/*
+ * Removes the |stream| from the current dependency tree.  This
+ * function assumes |stream->item| is NULL.
+ */
+int nghttp2_stream_dep_remove(nghttp2_stream *stream);
+
+/*
+ * Attaches |item| to |stream|.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ */
+int nghttp2_stream_attach_item(nghttp2_stream *stream,
+                               nghttp2_outbound_item *item);
+
+/*
+ * Detaches |stream->item|.  This function does not free
+ * |stream->item|.  The caller must free it.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ */
+int nghttp2_stream_detach_item(nghttp2_stream *stream);
+
+/*
+ * Makes the |stream| depend on the |dep_stream|.  This dependency is
+ * exclusive.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ */
+int nghttp2_stream_dep_insert_subtree(nghttp2_stream *dep_stream,
+                                      nghttp2_stream *stream);
+
+/*
+ * Makes the |stream| depend on the |dep_stream|.  This dependency is
+ * not exclusive.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ */
+int nghttp2_stream_dep_add_subtree(nghttp2_stream *dep_stream,
+                                   nghttp2_stream *stream);
+
+/*
+ * Removes subtree whose root stream is |stream|.  The
+ * effective_weight of streams in removed subtree is not updated.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * NGHTTP2_ERR_NOMEM
+ *     Out of memory
+ */
+void nghttp2_stream_dep_remove_subtree(nghttp2_stream *stream);
+
+/*
+ * Returns nonzero if |stream| is in any dependency tree.
+ */
+int nghttp2_stream_in_dep_tree(nghttp2_stream *stream);
+
+/*
+ * Schedules transmission of |stream|'s item, assuming stream->item is
+ * attached, and stream->last_writelen was updated.
+ */
+void nghttp2_stream_reschedule(nghttp2_stream *stream);
+
+/*
+ * Changes |stream|'s weight to |weight|.  If |stream| is queued, it
+ * will be rescheduled based on new weight.
+ */
+void nghttp2_stream_change_weight(nghttp2_stream *stream, int32_t weight);
+
+/*
+ * Returns a stream which has highest priority, updating
+ * descendant_last_cycle of selected stream's ancestors.
+ */
+nghttp2_outbound_item *
+nghttp2_stream_next_outbound_item(nghttp2_stream *stream);
+
+#endif /* NGHTTP2_STREAM */

lib/nghttp2_submit.c

@@ -0,0 +1,814 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012, 2013 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_submit.h"
+
+#include <string.h>
+#include <assert.h>
+
+#include "nghttp2_session.h"
+#include "nghttp2_frame.h"
+#include "nghttp2_helper.h"
+#include "nghttp2_priority_spec.h"
+
+/*
+ * Detects the dependency error, that is stream attempted to depend on
+ * itself.  If |stream_id| is -1, we use session->next_stream_id as
+ * stream ID.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * error codes:
+ *
+ * NGHTTP2_ERR_INVALID_ARGUMENT
+ *   Stream attempted to depend on itself.
+ */
+static int detect_self_dependency(nghttp2_session *session, int32_t stream_id,
+                                  const nghttp2_priority_spec *pri_spec) {
+  assert(pri_spec);
+
+  if (stream_id == -1) {
+    if ((int32_t)session->next_stream_id == pri_spec->stream_id) {
+      return NGHTTP2_ERR_INVALID_ARGUMENT;
+    }
+    return 0;
+  }
+
+  if (stream_id == pri_spec->stream_id) {
+    return NGHTTP2_ERR_INVALID_ARGUMENT;
+  }
+
+  return 0;
+}
+
+/* This function takes ownership of |nva_copy|. Regardless of the
+   return value, the caller must not free |nva_copy| after this
+   function returns. */
+static int32_t submit_headers_shared(nghttp2_session *session, uint8_t flags,
+                                     int32_t stream_id,
+                                     const nghttp2_priority_spec *pri_spec,
+                                     nghttp2_nv *nva_copy, size_t nvlen,
+                                     const nghttp2_data_provider *data_prd,
+                                     void *stream_user_data) {
+  int rv;
+  uint8_t flags_copy;
+  nghttp2_outbound_item *item = NULL;
+  nghttp2_frame *frame = NULL;
+  nghttp2_headers_category hcat;
+  nghttp2_mem *mem;
+
+  mem = &session->mem;
+
+  item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
+  if (item == NULL) {
+    rv = NGHTTP2_ERR_NOMEM;
+    goto fail;
+  }
+
+  nghttp2_outbound_item_init(item);
+
+  if (data_prd != NULL && data_prd->read_callback != NULL) {
+    item->aux_data.headers.data_prd = *data_prd;
+  }
+
+  item->aux_data.headers.stream_user_data = stream_user_data;
+
+  flags_copy =
+      (uint8_t)((flags & (NGHTTP2_FLAG_END_STREAM | NGHTTP2_FLAG_PRIORITY)) |
+                NGHTTP2_FLAG_END_HEADERS);
+
+  if (stream_id == -1) {
+    if (session->next_stream_id > INT32_MAX) {
+      rv = NGHTTP2_ERR_STREAM_ID_NOT_AVAILABLE;
+      goto fail;
+    }
+
+    stream_id = (int32_t)session->next_stream_id;
+    session->next_stream_id += 2;
+
+    hcat = NGHTTP2_HCAT_REQUEST;
+  } else {
+    /* More specific categorization will be done later. */
+    hcat = NGHTTP2_HCAT_HEADERS;
+  }
+
+  frame = &item->frame;
+
+  nghttp2_frame_headers_init(&frame->headers, flags_copy, stream_id, hcat,
+                             pri_spec, nva_copy, nvlen);
+
+  rv = nghttp2_session_add_item(session, item);
+
+  if (rv != 0) {
+    nghttp2_frame_headers_free(&frame->headers, mem);
+    goto fail2;
+  }
+
+  if (hcat == NGHTTP2_HCAT_REQUEST) {
+    return stream_id;
+  }
+
+  return 0;
+
+fail:
+  /* nghttp2_frame_headers_init() takes ownership of nva_copy. */
+  nghttp2_nv_array_del(nva_copy, mem);
+fail2:
+  nghttp2_mem_free(mem, item);
+
+  return rv;
+}
+
+static int32_t submit_headers_shared_nva(nghttp2_session *session,
+                                         uint8_t flags, int32_t stream_id,
+                                         const nghttp2_priority_spec *pri_spec,
+                                         const nghttp2_nv *nva, size_t nvlen,
+                                         const nghttp2_data_provider *data_prd,
+                                         void *stream_user_data) {
+  int rv;
+  nghttp2_nv *nva_copy;
+  nghttp2_priority_spec copy_pri_spec;
+  nghttp2_mem *mem;
+
+  mem = &session->mem;
+
+  if (pri_spec) {
+    copy_pri_spec = *pri_spec;
+    nghttp2_priority_spec_normalize_weight(&copy_pri_spec);
+  } else {
+    nghttp2_priority_spec_default_init(&copy_pri_spec);
+  }
+
+  rv = nghttp2_nv_array_copy(&nva_copy, nva, nvlen, mem);
+  if (rv < 0) {
+    return rv;
+  }
+
+  return submit_headers_shared(session, flags, stream_id, &copy_pri_spec,
+                               nva_copy, nvlen, data_prd, stream_user_data);
+}
+
+int nghttp2_submit_trailer(nghttp2_session *session, int32_t stream_id,
+                           const nghttp2_nv *nva, size_t nvlen) {
+  if (stream_id <= 0) {
+    return NGHTTP2_ERR_INVALID_ARGUMENT;
+  }
+
+  return (int)submit_headers_shared_nva(session, NGHTTP2_FLAG_END_STREAM,
+                                        stream_id, NULL, nva, nvlen, NULL,
+                                        NULL);
+}
+
+int32_t nghttp2_submit_headers(nghttp2_session *session, uint8_t flags,
+                               int32_t stream_id,
+                               const nghttp2_priority_spec *pri_spec,
+                               const nghttp2_nv *nva, size_t nvlen,
+                               void *stream_user_data) {
+  int rv;
+
+  if (stream_id == -1) {
+    if (session->server) {
+      return NGHTTP2_ERR_PROTO;
+    }
+  } else if (stream_id <= 0) {
+    return NGHTTP2_ERR_INVALID_ARGUMENT;
+  }
+
+  flags &= NGHTTP2_FLAG_END_STREAM;
+
+  if (pri_spec && !nghttp2_priority_spec_check_default(pri_spec)) {
+    rv = detect_self_dependency(session, stream_id, pri_spec);
+    if (rv != 0) {
+      return rv;
+    }
+
+    flags |= NGHTTP2_FLAG_PRIORITY;
+  } else {
+    pri_spec = NULL;
+  }
+
+  return submit_headers_shared_nva(session, flags, stream_id, pri_spec, nva,
+                                   nvlen, NULL, stream_user_data);
+}
+
+int nghttp2_submit_ping(nghttp2_session *session, uint8_t flags,
+                        const uint8_t *opaque_data) {
+  flags &= NGHTTP2_FLAG_ACK;
+  return nghttp2_session_add_ping(session, flags, opaque_data);
+}
+
+int nghttp2_submit_priority(nghttp2_session *session, uint8_t flags,
+                            int32_t stream_id,
+                            const nghttp2_priority_spec *pri_spec) {
+  int rv;
+  nghttp2_outbound_item *item;
+  nghttp2_frame *frame;
+  nghttp2_priority_spec copy_pri_spec;
+  nghttp2_mem *mem;
+  (void)flags;
+
+  mem = &session->mem;
+
+  if (stream_id == 0 || pri_spec == NULL) {
+    return NGHTTP2_ERR_INVALID_ARGUMENT;
+  }
+
+  if (stream_id == pri_spec->stream_id) {
+    return NGHTTP2_ERR_INVALID_ARGUMENT;
+  }
+
+  copy_pri_spec = *pri_spec;
+
+  nghttp2_priority_spec_normalize_weight(&copy_pri_spec);
+
+  item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
+
+  if (item == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  nghttp2_outbound_item_init(item);
+
+  frame = &item->frame;
+
+  nghttp2_frame_priority_init(&frame->priority, stream_id, &copy_pri_spec);
+
+  rv = nghttp2_session_add_item(session, item);
+
+  if (rv != 0) {
+    nghttp2_frame_priority_free(&frame->priority);
+    nghttp2_mem_free(mem, item);
+
+    return rv;
+  }
+
+  return 0;
+}
+
+int nghttp2_submit_rst_stream(nghttp2_session *session, uint8_t flags,
+                              int32_t stream_id, uint32_t error_code) {
+  (void)flags;
+
+  if (stream_id == 0) {
+    return NGHTTP2_ERR_INVALID_ARGUMENT;
+  }
+
+  return nghttp2_session_add_rst_stream(session, stream_id, error_code);
+}
+
+int nghttp2_submit_goaway(nghttp2_session *session, uint8_t flags,
+                          int32_t last_stream_id, uint32_t error_code,
+                          const uint8_t *opaque_data, size_t opaque_data_len) {
+  (void)flags;
+
+  if (session->goaway_flags & NGHTTP2_GOAWAY_TERM_ON_SEND) {
+    return 0;
+  }
+  return nghttp2_session_add_goaway(session, last_stream_id, error_code,
+                                    opaque_data, opaque_data_len,
+                                    NGHTTP2_GOAWAY_AUX_NONE);
+}
+
+int nghttp2_submit_shutdown_notice(nghttp2_session *session) {
+  if (!session->server) {
+    return NGHTTP2_ERR_INVALID_STATE;
+  }
+  if (session->goaway_flags) {
+    return 0;
+  }
+  return nghttp2_session_add_goaway(session, (1u << 31) - 1, NGHTTP2_NO_ERROR,
+                                    NULL, 0,
+                                    NGHTTP2_GOAWAY_AUX_SHUTDOWN_NOTICE);
+}
+
+int nghttp2_submit_settings(nghttp2_session *session, uint8_t flags,
+                            const nghttp2_settings_entry *iv, size_t niv) {
+  (void)flags;
+  return nghttp2_session_add_settings(session, NGHTTP2_FLAG_NONE, iv, niv);
+}
+
+int32_t nghttp2_submit_push_promise(nghttp2_session *session, uint8_t flags,
+                                    int32_t stream_id, const nghttp2_nv *nva,
+                                    size_t nvlen,
+                                    void *promised_stream_user_data) {
+  nghttp2_outbound_item *item;
+  nghttp2_frame *frame;
+  nghttp2_nv *nva_copy;
+  uint8_t flags_copy;
+  int32_t promised_stream_id;
+  int rv;
+  nghttp2_mem *mem;
+  (void)flags;
+
+  mem = &session->mem;
+
+  if (stream_id <= 0 || nghttp2_session_is_my_stream_id(session, stream_id)) {
+    return NGHTTP2_ERR_INVALID_ARGUMENT;
+  }
+
+  if (!session->server) {
+    return NGHTTP2_ERR_PROTO;
+  }
+
+  /* All 32bit signed stream IDs are spent. */
+  if (session->next_stream_id > INT32_MAX) {
+    return NGHTTP2_ERR_STREAM_ID_NOT_AVAILABLE;
+  }
+
+  item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
+  if (item == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  nghttp2_outbound_item_init(item);
+
+  item->aux_data.headers.stream_user_data = promised_stream_user_data;
+
+  frame = &item->frame;
+
+  rv = nghttp2_nv_array_copy(&nva_copy, nva, nvlen, mem);
+  if (rv < 0) {
+    nghttp2_mem_free(mem, item);
+    return rv;
+  }
+
+  flags_copy = NGHTTP2_FLAG_END_HEADERS;
+
+  promised_stream_id = (int32_t)session->next_stream_id;
+  session->next_stream_id += 2;
+
+  nghttp2_frame_push_promise_init(&frame->push_promise, flags_copy, stream_id,
+                                  promised_stream_id, nva_copy, nvlen);
+
+  rv = nghttp2_session_add_item(session, item);
+
+  if (rv != 0) {
+    nghttp2_frame_push_promise_free(&frame->push_promise, mem);
+    nghttp2_mem_free(mem, item);
+
+    return rv;
+  }
+
+  return promised_stream_id;
+}
+
+int nghttp2_submit_window_update(nghttp2_session *session, uint8_t flags,
+                                 int32_t stream_id,
+                                 int32_t window_size_increment) {
+  int rv;
+  nghttp2_stream *stream = 0;
+  (void)flags;
+
+  if (window_size_increment == 0) {
+    return 0;
+  }
+  if (stream_id == 0) {
+    rv = nghttp2_adjust_local_window_size(
+        &session->local_window_size, &session->recv_window_size,
+        &session->recv_reduction, &window_size_increment);
+    if (rv != 0) {
+      return rv;
+    }
+  } else {
+    stream = nghttp2_session_get_stream(session, stream_id);
+    if (!stream) {
+      return 0;
+    }
+
+    rv = nghttp2_adjust_local_window_size(
+        &stream->local_window_size, &stream->recv_window_size,
+        &stream->recv_reduction, &window_size_increment);
+    if (rv != 0) {
+      return rv;
+    }
+  }
+
+  if (window_size_increment > 0) {
+    if (stream_id == 0) {
+      session->consumed_size =
+          nghttp2_max(0, session->consumed_size - window_size_increment);
+    } else {
+      stream->consumed_size =
+          nghttp2_max(0, stream->consumed_size - window_size_increment);
+    }
+
+    return nghttp2_session_add_window_update(session, 0, stream_id,
+                                             window_size_increment);
+  }
+  return 0;
+}
+
+int nghttp2_session_set_local_window_size(nghttp2_session *session,
+                                          uint8_t flags, int32_t stream_id,
+                                          int32_t window_size) {
+  int32_t window_size_increment;
+  nghttp2_stream *stream;
+  int rv;
+  (void)flags;
+
+  if (window_size < 0) {
+    return NGHTTP2_ERR_INVALID_ARGUMENT;
+  }
+
+  if (stream_id == 0) {
+    window_size_increment = window_size - session->local_window_size;
+
+    if (window_size_increment == 0) {
+      return 0;
+    }
+
+    if (window_size_increment < 0) {
+      return nghttp2_adjust_local_window_size(
+          &session->local_window_size, &session->recv_window_size,
+          &session->recv_reduction, &window_size_increment);
+    }
+
+    rv = nghttp2_increase_local_window_size(
+        &session->local_window_size, &session->recv_window_size,
+        &session->recv_reduction, &window_size_increment);
+
+    if (rv != 0) {
+      return rv;
+    }
+  } else {
+    stream = nghttp2_session_get_stream(session, stream_id);
+
+    if (stream == NULL) {
+      return 0;
+    }
+
+    window_size_increment = window_size - stream->local_window_size;
+
+    if (window_size_increment == 0) {
+      return 0;
+    }
+
+    if (window_size_increment < 0) {
+      return nghttp2_adjust_local_window_size(
+          &stream->local_window_size, &stream->recv_window_size,
+          &stream->recv_reduction, &window_size_increment);
+    }
+
+    rv = nghttp2_increase_local_window_size(
+        &stream->local_window_size, &stream->recv_window_size,
+        &stream->recv_reduction, &window_size_increment);
+
+    if (rv != 0) {
+      return rv;
+    }
+  }
+
+  if (window_size_increment > 0) {
+    return nghttp2_session_add_window_update(session, 0, stream_id,
+                                             window_size_increment);
+  }
+
+  return 0;
+}
+
+int nghttp2_submit_altsvc(nghttp2_session *session, uint8_t flags,
+                          int32_t stream_id, const uint8_t *origin,
+                          size_t origin_len, const uint8_t *field_value,
+                          size_t field_value_len) {
+  nghttp2_mem *mem;
+  uint8_t *buf, *p;
+  uint8_t *origin_copy;
+  uint8_t *field_value_copy;
+  nghttp2_outbound_item *item;
+  nghttp2_frame *frame;
+  nghttp2_ext_altsvc *altsvc;
+  int rv;
+  (void)flags;
+
+  mem = &session->mem;
+
+  if (!session->server) {
+    return NGHTTP2_ERR_INVALID_STATE;
+  }
+
+  if (2 + origin_len + field_value_len > NGHTTP2_MAX_PAYLOADLEN) {
+    return NGHTTP2_ERR_INVALID_ARGUMENT;
+  }
+
+  if (stream_id == 0) {
+    if (origin_len == 0) {
+      return NGHTTP2_ERR_INVALID_ARGUMENT;
+    }
+  } else if (origin_len != 0) {
+    return NGHTTP2_ERR_INVALID_ARGUMENT;
+  }
+
+  buf = nghttp2_mem_malloc(mem, origin_len + field_value_len + 2);
+  if (buf == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  p = buf;
+
+  origin_copy = p;
+  if (origin_len) {
+    p = nghttp2_cpymem(p, origin, origin_len);
+  }
+  *p++ = '\0';
+
+  field_value_copy = p;
+  if (field_value_len) {
+    p = nghttp2_cpymem(p, field_value, field_value_len);
+  }
+  *p++ = '\0';
+
+  item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
+  if (item == NULL) {
+    rv = NGHTTP2_ERR_NOMEM;
+    goto fail_item_malloc;
+  }
+
+  nghttp2_outbound_item_init(item);
+
+  item->aux_data.ext.builtin = 1;
+
+  altsvc = &item->ext_frame_payload.altsvc;
+
+  frame = &item->frame;
+  frame->ext.payload = altsvc;
+
+  nghttp2_frame_altsvc_init(&frame->ext, stream_id, origin_copy, origin_len,
+                            field_value_copy, field_value_len);
+
+  rv = nghttp2_session_add_item(session, item);
+  if (rv != 0) {
+    nghttp2_frame_altsvc_free(&frame->ext, mem);
+    nghttp2_mem_free(mem, item);
+
+    return rv;
+  }
+
+  return 0;
+
+fail_item_malloc:
+  free(buf);
+
+  return rv;
+}
+
+int nghttp2_submit_origin(nghttp2_session *session, uint8_t flags,
+                          const nghttp2_origin_entry *ov, size_t nov) {
+  nghttp2_mem *mem;
+  uint8_t *p;
+  nghttp2_outbound_item *item;
+  nghttp2_frame *frame;
+  nghttp2_ext_origin *origin;
+  nghttp2_origin_entry *ov_copy;
+  size_t len = 0;
+  size_t i;
+  int rv;
+  (void)flags;
+
+  mem = &session->mem;
+
+  if (!session->server) {
+    return NGHTTP2_ERR_INVALID_STATE;
+  }
+
+  if (nov) {
+    for (i = 0; i < nov; ++i) {
+      len += ov[i].origin_len;
+    }
+
+    if (2 * nov + len > NGHTTP2_MAX_PAYLOADLEN) {
+      return NGHTTP2_ERR_INVALID_ARGUMENT;
+    }
+
+    /* The last nov is added for terminal NULL character. */
+    ov_copy =
+        nghttp2_mem_malloc(mem, nov * sizeof(nghttp2_origin_entry) + len + nov);
+    if (ov_copy == NULL) {
+      return NGHTTP2_ERR_NOMEM;
+    }
+
+    p = (uint8_t *)ov_copy + nov * sizeof(nghttp2_origin_entry);
+
+    for (i = 0; i < nov; ++i) {
+      ov_copy[i].origin = p;
+      ov_copy[i].origin_len = ov[i].origin_len;
+      p = nghttp2_cpymem(p, ov[i].origin, ov[i].origin_len);
+      *p++ = '\0';
+    }
+
+    assert((size_t)(p - (uint8_t *)ov_copy) ==
+           nov * sizeof(nghttp2_origin_entry) + len + nov);
+  } else {
+    ov_copy = NULL;
+  }
+
+  item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
+  if (item == NULL) {
+    rv = NGHTTP2_ERR_NOMEM;
+    goto fail_item_malloc;
+  }
+
+  nghttp2_outbound_item_init(item);
+
+  item->aux_data.ext.builtin = 1;
+
+  origin = &item->ext_frame_payload.origin;
+
+  frame = &item->frame;
+  frame->ext.payload = origin;
+
+  nghttp2_frame_origin_init(&frame->ext, ov_copy, nov);
+
+  rv = nghttp2_session_add_item(session, item);
+  if (rv != 0) {
+    nghttp2_frame_origin_free(&frame->ext, mem);
+    nghttp2_mem_free(mem, item);
+
+    return rv;
+  }
+
+  return 0;
+
+fail_item_malloc:
+  free(ov_copy);
+
+  return rv;
+}
+
+static uint8_t set_request_flags(const nghttp2_priority_spec *pri_spec,
+                                 const nghttp2_data_provider *data_prd) {
+  uint8_t flags = NGHTTP2_FLAG_NONE;
+  if (data_prd == NULL || data_prd->read_callback == NULL) {
+    flags |= NGHTTP2_FLAG_END_STREAM;
+  }
+
+  if (pri_spec) {
+    flags |= NGHTTP2_FLAG_PRIORITY;
+  }
+
+  return flags;
+}
+
+int32_t nghttp2_submit_request(nghttp2_session *session,
+                               const nghttp2_priority_spec *pri_spec,
+                               const nghttp2_nv *nva, size_t nvlen,
+                               const nghttp2_data_provider *data_prd,
+                               void *stream_user_data) {
+  uint8_t flags;
+  int rv;
+
+  if (session->server) {
+    return NGHTTP2_ERR_PROTO;
+  }
+
+  if (pri_spec && !nghttp2_priority_spec_check_default(pri_spec)) {
+    rv = detect_self_dependency(session, -1, pri_spec);
+    if (rv != 0) {
+      return rv;
+    }
+  } else {
+    pri_spec = NULL;
+  }
+
+  flags = set_request_flags(pri_spec, data_prd);
+
+  return submit_headers_shared_nva(session, flags, -1, pri_spec, nva, nvlen,
+                                   data_prd, stream_user_data);
+}
+
+static uint8_t set_response_flags(const nghttp2_data_provider *data_prd) {
+  uint8_t flags = NGHTTP2_FLAG_NONE;
+  if (data_prd == NULL || data_prd->read_callback == NULL) {
+    flags |= NGHTTP2_FLAG_END_STREAM;
+  }
+  return flags;
+}
+
+int nghttp2_submit_response(nghttp2_session *session, int32_t stream_id,
+                            const nghttp2_nv *nva, size_t nvlen,
+                            const nghttp2_data_provider *data_prd) {
+  uint8_t flags;
+
+  if (stream_id <= 0) {
+    return NGHTTP2_ERR_INVALID_ARGUMENT;
+  }
+
+  if (!session->server) {
+    return NGHTTP2_ERR_PROTO;
+  }
+
+  flags = set_response_flags(data_prd);
+  return submit_headers_shared_nva(session, flags, stream_id, NULL, nva, nvlen,
+                                   data_prd, NULL);
+}
+
+int nghttp2_submit_data(nghttp2_session *session, uint8_t flags,
+                        int32_t stream_id,
+                        const nghttp2_data_provider *data_prd) {
+  int rv;
+  nghttp2_outbound_item *item;
+  nghttp2_frame *frame;
+  nghttp2_data_aux_data *aux_data;
+  uint8_t nflags = flags & NGHTTP2_FLAG_END_STREAM;
+  nghttp2_mem *mem;
+
+  mem = &session->mem;
+
+  if (stream_id == 0) {
+    return NGHTTP2_ERR_INVALID_ARGUMENT;
+  }
+
+  item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
+  if (item == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  nghttp2_outbound_item_init(item);
+
+  frame = &item->frame;
+  aux_data = &item->aux_data.data;
+  aux_data->data_prd = *data_prd;
+  aux_data->eof = 0;
+  aux_data->flags = nflags;
+
+  /* flags are sent on transmission */
+  nghttp2_frame_data_init(&frame->data, NGHTTP2_FLAG_NONE, stream_id);
+
+  rv = nghttp2_session_add_item(session, item);
+  if (rv != 0) {
+    nghttp2_frame_data_free(&frame->data);
+    nghttp2_mem_free(mem, item);
+    return rv;
+  }
+  return 0;
+}
+
+ssize_t nghttp2_pack_settings_payload(uint8_t *buf, size_t buflen,
+                                      const nghttp2_settings_entry *iv,
+                                      size_t niv) {
+  if (!nghttp2_iv_check(iv, niv)) {
+    return NGHTTP2_ERR_INVALID_ARGUMENT;
+  }
+
+  if (buflen < (niv * NGHTTP2_FRAME_SETTINGS_ENTRY_LENGTH)) {
+    return NGHTTP2_ERR_INSUFF_BUFSIZE;
+  }
+
+  return (ssize_t)nghttp2_frame_pack_settings_payload(buf, iv, niv);
+}
+
+int nghttp2_submit_extension(nghttp2_session *session, uint8_t type,
+                             uint8_t flags, int32_t stream_id, void *payload) {
+  int rv;
+  nghttp2_outbound_item *item;
+  nghttp2_frame *frame;
+  nghttp2_mem *mem;
+
+  mem = &session->mem;
+
+  if (type <= NGHTTP2_CONTINUATION) {
+    return NGHTTP2_ERR_INVALID_ARGUMENT;
+  }
+
+  if (!session->callbacks.pack_extension_callback) {
+    return NGHTTP2_ERR_INVALID_STATE;
+  }
+
+  item = nghttp2_mem_malloc(mem, sizeof(nghttp2_outbound_item));
+  if (item == NULL) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+
+  nghttp2_outbound_item_init(item);
+
+  frame = &item->frame;
+  nghttp2_frame_extension_init(&frame->ext, type, flags, stream_id, payload);
+
+  rv = nghttp2_session_add_item(session, item);
+  if (rv != 0) {
+    nghttp2_frame_extension_free(&frame->ext);
+    nghttp2_mem_free(mem, item);
+    return rv;
+  }
+
+  return 0;
+}

lib/nghttp2_submit.h

@@ -0,0 +1,34 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGHTTP2_SUBMIT_H
+#define NGHTTP2_SUBMIT_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+
+#endif /* NGHTTP2_SUBMIT_H */

lib/nghttp2_version.c

@@ -0,0 +1,38 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012, 2013 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <nghttp2/nghttp2.h>
+
+static nghttp2_info version = {NGHTTP2_VERSION_AGE, NGHTTP2_VERSION_NUM,
+                               NGHTTP2_VERSION, NGHTTP2_PROTO_VERSION_ID};
+
+nghttp2_info *nghttp2_version(int least_version) {
+  if (least_version > NGHTTP2_VERSION_NUM)
+    return NULL;
+  return &version;
+}