create and encrypt SessionRequest

libi2pd/SSU2.h

@@ -19,9 +19,27 @@ namespace i2p
 namespace transport
 {
 	const int SSU2_TERMINATION_TIMEOUT = 330; // 5.5 minutes
+
+	enum SSU2MessageType
+	{
+		eSSU2SessionRequest = 0
+	};
 	
 	class SSU2Session: public TransportSession, public std::enable_shared_from_this<SSU2Session>
 	{
+		union Header
+		{
+			uint64_t ll[2];
+			uint8_t buf[16];
+			struct
+			{
+				uint8_t connID[8];
+				uint8_t packetNum[4];
+				uint8_t type;
+				uint8_t flags[3];
+			} h;
+		};
+	
 		public:
 
 			SSU2Session (std::shared_ptr<const i2p::data::RouterInfo> in_RemoteRouter = nullptr,
@@ -31,7 +49,7 @@ namespace transport
 		private:
 
 			void SendSessionRequest ();
-			void EncryptHeader (i2p::crypto::ChipherBlock& header);
+			void EncryptHeader (Header& h);
 			void CreateHeaderMask (const uint8_t * kh1, const uint8_t * nonce1, const uint8_t * kh2, const uint8_t * nonce2);
 		
 		private:
@@ -40,7 +58,11 @@ namespace transport
 			std::unique_ptr<i2p::crypto::NoiseSymmetricState> m_NoiseState;
 			std::shared_ptr<const i2p::data::RouterInfo::Address> m_Address;
 
-			i2p::crypto::ChipherBlock m_HeaderMask;
+			union 
+			{
+				uint64_t ll[2];
+				uint8_t buf[16];
+			} m_HeaderMask;
 	};
 }
 }