diff --git a/libs/cloud/picloudclient.cpp b/libs/cloud/picloudclient.cpp
index 2c2bef29..b35c7a82 100644
--- a/libs/cloud/picloudclient.cpp
+++ b/libs/cloud/picloudclient.cpp
@@ -18,9 +18,12 @@
 */
 
 #include "picloudclient.h"
+#include "picloudtcp.h"
 
 
 PICloudClient::PICloudClient(const PIString & path, PIIODevice::DeviceMode mode) : PIIODevice(path, mode), eth(PIEthernet::TCP_Client) {
+	tcp.setRole(PICloud::TCP::Client);
+	setName("cloud_client");
 }
 
 
@@ -30,15 +33,32 @@ PICloudClient::~PICloudClient() {
 }
 
 
+void PICloudClient::setServerName(const PIString & server_name) {
+	setName("cloud_client__" + server_name);
+	tcp.setServerName(server_name);
+}
+
+
 bool PICloudClient::openDevice() {
+	piCout << "PICloudClient open device" << path();
+	bool op = eth.connect(path(), false);
+	if (op) {
+		CONNECTL(&eth, disconnected, [this](bool){opened_ = false;});
+		CONNECTU(&eth, threadedReadEvent, this, readed);
+		eth.startThreadedRead();
+		tcp.sendStart(&eth);
+		return true;
+	}
+	eth.close();
 	return false;
 }
 
 
 bool PICloudClient::closeDevice() {
-	return false;
+	return eth.close();
 }
 
+
 int PICloudClient::readDevice(void * read_to, int max_size) {
 	return eth.read(read_to, max_size);
 }
@@ -47,3 +67,8 @@ int PICloudClient::readDevice(void * read_to, int max_size) {
 int PICloudClient::writeDevice(const void * data, int max_size) {
 	return eth.write(data, max_size);
 }
+
+
+void PICloudClient::readed(uchar *data, int size) {
+
+}
diff --git a/libs/cloud/picloudserver.cpp b/libs/cloud/picloudserver.cpp
index fb7cb68c..64415822 100644
--- a/libs/cloud/picloudserver.cpp
+++ b/libs/cloud/picloudserver.cpp
@@ -21,6 +21,10 @@
 
 
 PICloudServer::PICloudServer(const PIString & path, PIIODevice::DeviceMode mode) : PIIODevice(path, mode), eth(PIEthernet::TCP_Client) {
+	PIString name = "cloud_server_" + PIString::fromNumber(randomi()%1000);
+	tcp.setRole(PICloud::TCP::Server);
+	tcp.setServerName(name);
+	setName(name);
 }
 
 
@@ -36,8 +40,9 @@ bool PICloudServer::openDevice() {
 	if (op) {
 		CONNECTL(&eth, disconnected, [this](bool){opened_ = false;});
 		CONNECTU(&eth, threadedReadEvent, this, readed);
+		CONNECTL(&eth, connected, [this](){tcp.sendStart(&eth);});
 		eth.startThreadedRead();
-		sendStart();
+		tcp.sendStart(&eth);
 		return true;
 	}
 	eth.close();
@@ -60,12 +65,6 @@ int PICloudServer::writeDevice(const void * data, int max_size) {
 }
 
 
-void PICloudServer::sendStart() {
-
-}
-
-
-
 PICloudServer::Client::Client(PICloudServer * srv) : server(srv) {
 
 }
diff --git a/libs/cloud/picloudtcp.cpp b/libs/cloud/picloudtcp.cpp
index 905b7980..42864ab0 100644
--- a/libs/cloud/picloudtcp.cpp
+++ b/libs/cloud/picloudtcp.cpp
@@ -20,23 +20,70 @@
 #include "picloudtcp.h"
 #include "picrypt.h"
 #include "pichunkstream.h"
+#include "piethernet.h"
 
 
 const char hash_def_key[] = "_picrypt_";
 
 
-PIByteArray & operator <<(PIByteArray & s, const PICloud::Header & v) {
-	s << v.version << v.type << v.sname;
-	return s;
-}
-
-
-PIByteArray & operator >>(PIByteArray & s, PICloud::Header & v) {
-	s >> v.version >> v.type >> v.sname;
-	return s;
+PICloud::TCP::Header::Header() {
+	version = Version_1;
 }
 
 
 PICloud::TCP::TCP() {
 }
 
+
+void PICloud::TCP::setRole(PICloud::TCP::Role r) {
+	header.role = r;
+}
+
+
+void PICloud::TCP::setServerName(const PIString & server_name) {
+	sname = server_name;
+}
+
+
+void PICloud::TCP::sendStart(PIEthernet * eth) {
+	header.type = PICloud::TCP::Connect;
+	PIByteArray ba;
+	ba << header << sname;
+	eth->send(ba);
+}
+
+
+PIPair<PICloud::TCP::Type, PICloud::TCP::Role> PICloud::TCP::parseHeader(PIByteArray & ba) {
+	PIPair<PICloud::TCP::Type, PICloud::TCP::Role> ret;
+	ret.first = Invalid;
+	if (ba.size() < sizeof(Header)) return ret;
+	PICloud::TCP::Header hdr;
+	ba >> hdr;
+	if (hdr.version != header.version) {
+		piCout << "[PICloud]" << "invalid TCP version!";
+		return ret;
+	}
+	ret.first = (Type)hdr.type;
+	ret.second = (Role)hdr.role;
+	return ret;
+}
+
+
+PIByteArray PICloud::TCP::parseData(PIByteArray & ba) {
+	if (header.role == Server) {
+		PIString client;
+		ba >> client;
+		return ba;
+	}
+	if (header.role == Client) {
+		return ba;
+	}
+	return PIByteArray();
+}
+
+
+PIString PICloud::TCP::parseConnect(PIByteArray & ba) {
+	PIString ret;
+	ba >> ret;
+	return ret;
+}
diff --git a/libs/main/cloud/picloudclient.h b/libs/main/cloud/picloudclient.h
index cbf4c069..27e86303 100644
--- a/libs/main/cloud/picloudclient.h
+++ b/libs/main/cloud/picloudclient.h
@@ -23,7 +23,7 @@
 #ifndef PICLOUDCLIENT_H
 #define PICLOUDCLIENT_H
 
-#include "pip_cloud_export.h"
+#include "picloudtcp.h"
 #include "piethernet.h"
 
 
@@ -35,15 +35,19 @@ public:
 	explicit PICloudClient(const PIString & path = PIString(), PIIODevice::DeviceMode mode = PIIODevice::ReadWrite);
 	virtual ~PICloudClient();
 
+	void setServerName(const PIString & server_name);
+
 protected:
 	bool openDevice();
 	bool closeDevice();
-
-private:
 	int readDevice(void * read_to, int max_size);
 	int writeDevice(const void * data, int max_size);
 
+private:
+	EVENT_HANDLER2(void, readed, uchar * , data, int, size);
+
 	PIEthernet eth;
+	PICloud::TCP tcp;
 };
 
 #endif // PICLOUDCLIENT_H
diff --git a/libs/main/cloud/picloudserver.h b/libs/main/cloud/picloudserver.h
index 32f05a8f..a432481b 100644
--- a/libs/main/cloud/picloudserver.h
+++ b/libs/main/cloud/picloudserver.h
@@ -23,7 +23,7 @@
 #ifndef PICLOUDSERVER_H
 #define PICLOUDSERVER_H
 
-#include "pip_cloud_export.h"
+#include "picloudtcp.h"
 #include "piethernet.h"
 
 
@@ -55,11 +55,10 @@ protected:
 
 private:
 	EVENT_HANDLER2(void, readed, uchar * , data, int, size);
-	void sendStart();
 
 	PIEthernet eth;
 	PIVector<Client> clients;
-
+	PICloud::TCP tcp;
 };
 
 #endif // PICLOUDSERVER_H
diff --git a/libs/main/cloud/picloudtcp.h b/libs/main/cloud/picloudtcp.h
index 9c22289e..8f533ff6 100644
--- a/libs/main/cloud/picloudtcp.h
+++ b/libs/main/cloud/picloudtcp.h
@@ -27,38 +27,51 @@
 #include "pistring.h"
 
 
+class PIEthernet;
+
 namespace PICloud {
 
-enum Version {
-	Version_1 = 1,
-};
-
-enum HeaderType {
-	Server = 1,
-	Client = 2,
-};
-
-struct PIP_CLOUD_EXPORT Header {
-	Header() {
-		version = Version_1;
-	}
-	uchar version; // PICloud::Version
-	uchar type; // PICloud::HeaderType
-	PIString sname; // server name
-};
 
 
 class PIP_CLOUD_EXPORT TCP {
 public:
+	enum Version {
+		Version_1 = 1,
+	};
+
+	enum Role {
+		Server = 1,
+		Client = 2,
+	};
+
+	enum Type {
+		Invalid = 0,
+		Connect = 1,
+		Disconnect = 2,
+		Data = 3,
+	};
+
 	TCP();
+	void setRole(Role r);
+	void setServerName(const PIString & server_name);
+
+	void sendStart(PIEthernet * eth);
+	PIPair<PICloud::TCP::Type, PICloud::TCP::Role> parseHeader(PIByteArray & ba);
+	PIByteArray parseData(PIByteArray & ba);
+	PIString parseConnect(PIByteArray & ba);
 
 private:
+	struct Header {
+		Header();
+		uchar version; // PICloud::Version
+		uchar type; // PICloud::Type
+		uchar role; // PICloud::Role
+	};
 
+	Header header;
+	PIString sname;
 };
 
 }
 
-PIP_CLOUD_EXPORT PIByteArray & operator <<(PIByteArray & s, const PICloud::Header & v);
-PIP_CLOUD_EXPORT PIByteArray & operator >>(PIByteArray & s, PICloud::Header & v);
-
 #endif // PICLOUDTCP_H
diff --git a/main.cpp b/main.cpp
index 4485f0aa..24975a80 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,37 +1,20 @@
 #include "pip.h"
 
 
-int main() {
-	PIVector<int> indexes;
-	PIEvaluator eval;
-	int dims = 3;
-	indexes << eval.setVariable("l", complexd(1.));
-	indexes << eval.setVariable("mc", complexd(1.));
-	for (int i = 0; i < dims; ++i) {
-		indexes << eval.setVariable("t" + PIString::fromNumber(i), complexd(1.));
-		indexes << eval.setVariable("tv" + PIString::fromNumber(i), complexd(1.));
+int main(int argc, char * argv[]) {
+	PICLI cli(argc, argv);
+	cli.addArgument("connect", true);
+	PICloudClient c("127.0.0.1:10101");
+	PICloudServer s("127.0.0.1:10101");
+	if (cli.hasArgument("connect")) {
+		c.setServerName(cli.argumentValue("connect"));
+		c.startThreadedRead();
+	} else {
+		s.startThreadedRead();
 	}
-	for (int i = 0; i < dims; ++i) {
-		indexes << eval.setVariable("m" + PIString::fromNumber(i), complexd(1.));
-		indexes << eval.setVariable("mv" + PIString::fromNumber(i), complexd(1.));
-	}
-	piCout << indexes;
-
-	indexes.clear();
-	indexes << eval.setVariable("l", complexd(1.));
-	indexes << eval.setVariable("mc", complexd(1.));
-	for (int i = 0; i < dims; ++i) {
-		indexes << eval.setVariable("t" + PIString::fromNumber(i), complexd(1.));
-		indexes << eval.setVariable("tv" + PIString::fromNumber(i), complexd(1.));
-	}
-	for (int i = 0; i < dims; ++i) {
-		indexes << eval.setVariable("m" + PIString::fromNumber(i), complexd(1.));
-		indexes << eval.setVariable("mv" + PIString::fromNumber(i), complexd(1.));
-	}
-	piCout << indexes;
-
-	PIEvaluator * eval_x = new PIEvaluator();
-	piCout << eval_x->setVariable("t");
-	piCout << eval_x->setVariable("t");
+	PIKbdListener ls;
+	ls.enableExitCapture(PIKbdListener::F10);
+	ls.start();
+	WAIT_FOR_EXIT
 	return 0;
 }
diff --git a/utils/cloud_dispatcher/cloudserver.cpp b/utils/cloud_dispatcher/cloudserver.cpp
index 01ff10d1..f114ea8c 100644
--- a/utils/cloud_dispatcher/cloudserver.cpp
+++ b/utils/cloud_dispatcher/cloudserver.cpp
@@ -1,7 +1,8 @@
 #include "cloudserver.h"
 
-CloudServer::CloudServer(DispatcherClient * c) : server(c) {
-
+CloudServer::CloudServer(DispatcherClient * c, const PIString & sname) : server(c) {
+	setName(sname);
+	server_name = sname;
 }
 
 
@@ -12,13 +13,30 @@ CloudServer::~CloudServer() {
 }
 
 
+PIString CloudServer::serverName() const {
+	return server_name;
+}
+
+
 void CloudServer::addClient(DispatcherClient * c) {
 	clients << c;
 }
 
+
+void CloudServer::removeClient(DispatcherClient * c) {
+	clients.removeOne(c);
+}
+
+
+PIVector<DispatcherClient *> CloudServer::getClients() {
+	return clients;
+}
+
+
 void CloudServer::printStatus() {
 	piCout << "    " << "Clients for" << server->address() << ":";
 	for (auto c: clients) {
 		piCout << "        " << c->address();
 	}
 }
+
diff --git a/utils/cloud_dispatcher/cloudserver.h b/utils/cloud_dispatcher/cloudserver.h
index be44352a..5a169bd5 100644
--- a/utils/cloud_dispatcher/cloudserver.h
+++ b/utils/cloud_dispatcher/cloudserver.h
@@ -7,14 +7,18 @@
 class CloudServer : public PIObject {
 	PIOBJECT(CloudServer)
 public:
-	CloudServer(DispatcherClient * c);
+	CloudServer(DispatcherClient * c, const PIString & sname);
 	~CloudServer();
+	PIString serverName() const;
 	void addClient(DispatcherClient * c);
+	void removeClient(DispatcherClient * c);
+	PIVector<DispatcherClient*> getClients();
 	EVENT_HANDLER0(void, printStatus);
 
 private:
 	DispatcherClient * server;
 	PIVector<DispatcherClient*> clients;
+	PIString server_name;
 };
 
 #endif // CLOUDSERVER_H
diff --git a/utils/cloud_dispatcher/dispatcherclient.cpp b/utils/cloud_dispatcher/dispatcherclient.cpp
index b9cdfd64..1995c25a 100644
--- a/utils/cloud_dispatcher/dispatcherclient.cpp
+++ b/utils/cloud_dispatcher/dispatcherclient.cpp
@@ -4,10 +4,14 @@
 
 DispatcherClient::DispatcherClient(PIEthernet * eth_) : eth(eth_), authorised(false) {
 	CONNECTU(&disconnect_tm, tickEvent, eth, close);
-	eth->startThreadedRead();
 	CONNECTU(eth, threadedReadEvent, this, readed);
 	CONNECTU(eth, disconnected, this, disconnected);
 	piCoutObj << "client connected" << eth->sendAddress();
+}
+
+
+void DispatcherClient::start() {
+	eth->startThreadedRead();
 	disconnect_tm.start(10000);
 }
 
@@ -33,18 +37,40 @@ void DispatcherClient::disconnected(bool withError) {
 
 
 void DispatcherClient::readed(uchar *data, int size) {
+	piCout << size;
 	PIByteArray ba(data, size);
+	PIPair<PICloud::TCP::Type, PICloud::TCP::Role> hdr = tcp.parseHeader(ba);
+	if (hdr.first == PICloud::TCP::Invalid) {
+		disconnected(true);
+		return;
+	}
 	if (authorised) {
-		dataReaded(ba);
-	} else {
-		if (ba.size() < 4) return;
-		PICloud::Header hdr;
-		ba >> hdr;
-		if ((PICloud::HeaderType)hdr.type == PICloud::Server) {
-			registerServer(hdr.sname, this);
+		switch (hdr.first) {
+		case PICloud::TCP::Connect:
+		return;
+		case PICloud::TCP::Disconnect:
+			disconnected(false);
+		return;
+		case PICloud::TCP::Data:
+			dataReaded(tcp.parseData(ba));
+		return;
+		default:
+			disconnected(true);
+		return;
 		}
-		if ((PICloud::HeaderType)hdr.type == PICloud::Client) {
-			registerClient(hdr.sname, this);
+	} else {
+		switch (hdr.first) {
+		case PICloud::TCP::Connect: {
+			PIString sn = tcp.parseConnect(ba);
+			if (hdr.second == PICloud::TCP::Server) registerServer(sn, this);
+			if (hdr.second == PICloud::TCP::Client) registerClient(sn, this);
+		return;}
+		case PICloud::TCP::Disconnect:
+			disconnected(false);
+		return;
+		default:
+			disconnected(true);
+		return;
 		}
 	}
 }
diff --git a/utils/cloud_dispatcher/dispatcherclient.h b/utils/cloud_dispatcher/dispatcherclient.h
index 99f7cc62..22d3cce6 100644
--- a/utils/cloud_dispatcher/dispatcherclient.h
+++ b/utils/cloud_dispatcher/dispatcherclient.h
@@ -2,12 +2,14 @@
 #define DISPATCHERCLIENT_H
 
 #include "piethernet.h"
+#include "picloudtcp.h"
 
 
 class DispatcherClient: public PIObject {
 	PIOBJECT(DispatcherClient)
 public:
 	DispatcherClient(PIEthernet * eth_);
+	void start();
 	~DispatcherClient();
 	EVENT1(disconnectEvent, DispatcherClient *, client)
 	EVENT2(registerServer, PIString, sname, DispatcherClient *, client)
@@ -23,6 +25,7 @@ private:
 	PIEthernet * eth;
 	PITimer disconnect_tm;
 	bool authorised;
+	PICloud::TCP tcp;
 };
 
 
diff --git a/utils/cloud_dispatcher/dispatcherserver.cpp b/utils/cloud_dispatcher/dispatcherserver.cpp
index 4b5a50cf..702af9f9 100644
--- a/utils/cloud_dispatcher/dispatcherserver.cpp
+++ b/utils/cloud_dispatcher/dispatcherserver.cpp
@@ -35,9 +35,26 @@ void DispatcherServer::printStatus() {
 
 
 void  DispatcherServer::disconnectClient(DispatcherClient *client) {
+	if (!clients.contains(client)) {
+		piCoutObj << "INVALID client" << client;
+		return;
+	}
 	piCoutObj << "remove client" << client;
 	map_mutex.lock();
 	clients.removeOne(client);
+	CloudServer * cs = index_c_servers.value(client, nullptr);
+	if (cs) {
+		PIVector<DispatcherClient *> cscv = cs->getClients();
+		for(auto csc : cscv) {
+			csc->close();
+			clients.removeOne(csc);
+			delete csc;
+		}
+		c_servers.remove(cs->serverName());
+	}
+	CloudServer * cc = index_c_clients.value(client, nullptr);
+	if (cc) cc->removeClient(client);
+	client->close();
 	map_mutex.unlock();
 	delete client;
 }
@@ -48,17 +65,24 @@ void DispatcherServer::newConnection(PIEthernet *cl) {
 	CONNECTU(client, disconnectEvent, this, disconnectClient);
 	CONNECTL(client, registerServer, [this](PIString sname, DispatcherClient * c){
 		map_mutex.lock();
-		c_servers.insert(sname, new CloudServer(c));
+		piCoutObj << "add new Server ->" << sname;
+		CloudServer * cs = new CloudServer(c, sname);
+		c_servers.insert(sname, cs);
+		index_c_servers.insert(c, cs);
 		map_mutex.unlock();
 	});
 	CONNECTL(client, registerClient, [this](PIString sname, DispatcherClient * c){
 		map_mutex.lock();
-		if (c_servers.contains(sname)) {
-			c_servers[sname]->addClient(c);
+		CloudServer * cs = c_servers.value(sname, nullptr);
+		if (cs) {
+			piCoutObj << "add new Client to Server ->" << sname;
+			cs->addClient(c);
+			index_c_clients.insert(c, cs);
 		}
 		map_mutex.unlock();
 	});
 	piCoutObj << "add client" << client;
+	client->start();
 	map_mutex.lock();
 	clients.push_back(client);
 	map_mutex.unlock();
diff --git a/utils/cloud_dispatcher/dispatcherserver.h b/utils/cloud_dispatcher/dispatcherserver.h
index 7fba7ef4..c4161aba 100644
--- a/utils/cloud_dispatcher/dispatcherserver.h
+++ b/utils/cloud_dispatcher/dispatcherserver.h
@@ -18,6 +18,8 @@ private:
 	PIEthernet eth;
 	PIVector<DispatcherClient*> clients;
 	PIMap<PIString, CloudServer *> c_servers;
+	PIMap<const DispatcherClient *, CloudServer *> index_c_servers;
+	PIMap<const DispatcherClient *, CloudServer *> index_c_clients;
 	PITimer status_timer;
 	PIMutex map_mutex;
 };