SSU payload types

SSU.h

@@ -2,6 +2,7 @@
 #define SSU_H__
 
 #include <inttypes.h>
+#include <map>
 #include <boost/asio.hpp>
 
 namespace i2p
@@ -10,11 +11,46 @@ namespace ssu
 {
 	const int SSU_MTU = 1484;
 
+	// payload types (4 bits)
+	const uint8_t PAYLOAD_TYPE_SESSION_REQUEST = 0;
+	const uint8_t PAYLOAD_TYPE_SESSION_CREATED = 1;
+	const uint8_t PAYLOAD_TYPE_SESSION_CONFIRMED = 2;
+	const uint8_t PAYLOAD_TYPE_RELAY_REQUEST = 3;
+	const uint8_t PAYLOAD_TYPE_RELAY_RESPONSE = 4;
+	const uint8_t PAYLOAD_TYPE_RELAY_INTRO = 5;
+	const uint8_t PAYLOAD_TYPE_DATA = 6;
+	const uint8_t PAYLOAD_TYPE_TEST = 7;
+
+	enum SessionState
+	{
+		eSessionStateUnknown,
+		eSessionStateRequestSent, 
+		eSessionStateRequestReceived,
+		eSessionStateCreatedSent,
+		eSessionStateCreatedReceived,
+		eSessionStateConfirmedSent,
+		eSessionStateConfirmedReceived,
+		eSessionStateEstablised
+	};		
+
+	class SSUSession
+	{
+		public:
+
+			SSUSession ();
+			void ProcessNextMessage (uint8_t * buf, std::size_t len);
+
+		private:
+			
+			SessionState m_State;	
+	};
+
 	class SSUServer
 	{
 		public:
 
 			SSUServer (boost::asio::io_service& service, int port);
+			~SSUServer ();
 			void Start ();
 			void Stop ();
 
@@ -28,6 +64,7 @@ namespace ssu
 			boost::asio::ip::udp::socket m_Socket;
 			boost::asio::ip::udp::endpoint m_SenderEndpoint;
 			uint8_t m_ReceiveBuffer[SSU_MTU];
+			std::map<boost::asio::ip::udp::endpoint, SSUSession *> m_Sessions;
 	};
 }
 }