curl 2025-02-05 (34cf9d54)

Code extracted from:

    https://github.com/curl/curl.git

at commit 34cf9d54a46598c44938aa7598820484d7af7133 (curl-8_12_0).

lib/httpsrr.h

@@ -0,0 +1,76 @@
+#ifndef HEADER_CURL_HTTPSRR_H
+#define HEADER_CURL_HTTPSRR_H
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * SPDX-License-Identifier: curl
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#ifdef USE_ARES
+#include <ares.h>
+#endif
+
+#ifdef USE_HTTPSRR
+
+#define CURL_MAXLEN_host_name 253
+#define MAX_HTTPSRR_ALPNS 4
+
+struct Curl_https_rrinfo {
+  /*
+   * Fields from HTTPS RR. The only mandatory fields are priority and target.
+   * See https://datatracker.ietf.org/doc/html/rfc9460#section-14.3.2
+   */
+  char *target;
+  unsigned char *ipv4hints; /* keytag = 4 */
+  size_t ipv4hints_len;
+  unsigned char *echconfiglist; /* keytag = 5 */
+  size_t echconfiglist_len;
+  unsigned char *ipv6hints; /* keytag = 6 */
+  size_t ipv6hints_len;
+  unsigned char alpns[MAX_HTTPSRR_ALPNS]; /* keytag = 1 */
+  /* store parsed alpnid entries in the array, end with ALPN_none */
+  int port; /* -1 means not set */
+  uint16_t priority;
+  bool no_def_alpn; /* keytag = 2 */
+};
+#endif
+
+/*
+ * Code points for DNS wire format SvcParams as per RFC 9460
+ */
+#define HTTPS_RR_CODE_ALPN            0x01
+#define HTTPS_RR_CODE_NO_DEF_ALPN     0x02
+#define HTTPS_RR_CODE_PORT            0x03
+#define HTTPS_RR_CODE_IPV4            0x04
+#define HTTPS_RR_CODE_ECH             0x05
+#define HTTPS_RR_CODE_IPV6            0x06
+
+CURLcode Curl_httpsrr_decode_alpn(const unsigned char *cp, size_t len,
+                                  unsigned char *alpns);
+
+#if defined(USE_ARES) && defined(USE_HTTPSRR)
+void Curl_dnsrec_done_cb(void *arg, ares_status_t status,
+                         size_t timeouts,
+                         const ares_dns_record_t *dnsrec);
+#endif
+#endif /* HEADER_CURL_HTTPSRR_H */