common Identity for LeaseSet and RouterInfo

LeaseSet.cpp

@@ -1,6 +1,5 @@
 #include <cryptopp/sha.h>
 #include "Log.h"
-#include "RouterInfo.h"
 #include "LeaseSet.h"
 
 namespace i2p
@@ -12,7 +11,7 @@ namespace data
 #pragma pack(1)
 		struct H
 		{
-			RouterIdentity destination;
+			Identity destination;
 			uint8_t encryptionKey[256];
 			uint8_t signingKey[128];
 			uint8_t num;
@@ -20,7 +19,7 @@ namespace data
 #pragma pack ()	
 
 		const H * header = (const H *)buf;
-		CryptoPP::SHA256().CalculateDigest(m_IdentHash, (uint8_t *)&header->destination, sizeof (RouterIdentity));
+		CryptoPP::SHA256().CalculateDigest(m_IdentHash, (uint8_t *)&header->destination, sizeof (Identity));
 		memcpy (m_EncryptionKey, header->encryptionKey, 256);
 		LogPrint ("LeaseSet num=", (int)header->num);
 

LeaseSet.h

@@ -11,12 +11,21 @@ namespace data
 {	
 	
 #pragma pack(1)
+
+	struct Identity
+	{
+		uint8_t publicKey[256];
+		uint8_t signingKey[128];
+		uint8_t certificate[3];
+	};
+	
 	struct Lease
 	{
 		uint8_t tunnelGateway[32];
 		uint32_t tunnelID;
 		uint64_t endDate;
 	};	
+	
 #pragma pack()	
 
 	class IdentHash

NTCPSession.h

@@ -37,7 +37,7 @@ namespace ntcp
 	struct NTCPPhase3
 	{
 		uint16_t size;
-		i2p::data::RouterIdentity ident;
+		i2p::data::Identity ident;
 		uint32_t timestamp; 
 		uint8_t padding[15];
 		uint8_t signature[40];

RouterContext.cpp

@@ -26,7 +26,7 @@ namespace i2p
 	
 	void RouterContext::CreateNewRouter ()
 	{
-		i2p::data::RouterIdentity ident;
+		i2p::data::Identity ident;
 		
 		CryptoPP::DH dh (i2p::crypto::elgp, i2p::crypto::elgg);
 		dh.GenerateKeyPair(m_Rnd, m_PrivateKey, ident.publicKey);

RouterContext.h

@@ -22,7 +22,7 @@ namespace i2p
 			const uint8_t * GetSigningPrivateKey () const;
 			const uint8_t * GetLeaseSetPrivateKey () const { return m_LeaseSetPrivateKey; };
 			const uint8_t * GetLeaseSetPublicKey () const { return m_LeaseSetPublicKey; };
-			const i2p::data::RouterIdentity& GetRouterIdentity () const { return m_RouterInfo.GetRouterIdentity (); };
+			const i2p::data::Identity& GetRouterIdentity () const { return m_RouterInfo.GetRouterIdentity (); };
 			CryptoPP::RandomNumberGenerator& GetRandomNumberGenerator () { return m_Rnd; };	
 			
 			void Sign (uint8_t * buf, int len, uint8_t * signature);

RouterInfo.cpp

@@ -30,7 +30,7 @@ namespace data
 		ReadFromBuffer ();
 	}	
 	
-	void RouterInfo::SetRouterIdentity (const RouterIdentity& identity)
+	void RouterInfo::SetRouterIdentity (const Identity& identity)
 	{	
 		m_RouterIdentity = identity;
 		CryptoPP::SHA256().CalculateDigest(m_IdentHash, (uint8_t *)&m_RouterIdentity, sizeof (m_RouterIdentity));

RouterInfo.h

@@ -13,17 +13,6 @@ namespace i2p
 {
 namespace data
 {			
-#pragma pack (1)
-
-	struct RouterIdentity
-	{
-		uint8_t publicKey[256];
-		uint8_t signingKey[128];
-		uint8_t certificate[3];
-	};
-#pragma pack ()	
-	
-	
 	class RouterInfo: public RoutingDestination
 	{
 		public:
@@ -49,8 +38,8 @@ namespace data
 			RouterInfo (const RouterInfo& ) = default;
 			RouterInfo (const uint8_t * buf, int len);
 			
-			const RouterIdentity& GetRouterIdentity () const { return m_RouterIdentity; };
-			void SetRouterIdentity (const RouterIdentity& identity);
+			const Identity& GetRouterIdentity () const { return m_RouterIdentity; };
+			void SetRouterIdentity (const Identity& identity);
 			const char * GetIdentHashBase64 () const { return m_IdentHashBase64; };
 			const char * GetIdentHashAbbreviation () const { return m_IdentHashAbbreviation; };
 			uint64_t GetTimestamp () const { return m_Timestamp; };
@@ -88,7 +77,7 @@ namespace data
 			
 		private:
 
-			RouterIdentity m_RouterIdentity;
+			Identity m_RouterIdentity;
 			IdentHash m_IdentHash;
 			char m_IdentHashBase64[48], m_IdentHashAbbreviation[5];
 			char m_Buffer[2048];

Streaming.cpp

@@ -3,13 +3,20 @@
 #include <cryptopp/gzip.h>
 #include "Log.h"
 #include "RouterInfo.h"
+#include "RouterContext.h"
 #include "Streaming.h"
 
 namespace i2p
 {
 namespace stream
 {
-	void StreamingDestination::HandleNextPacket (const uint8_t * buf, size_t len)
+	Stream::Stream (const i2p::data::IdentHash& destination):
+		m_SendStreamID (0)
+	{
+		m_RecvStreamID = i2p::context.GetRandomNumberGenerator ().GenerateWord32 ();
+	}	
+
+	void Stream::HandleNextPacket (const uint8_t * buf, size_t len)
 	{
 		const uint8_t * end = buf + len;
 		buf += 4; // sendStreamID
@@ -42,7 +49,7 @@ namespace stream
 		if (flags & PACKET_FLAG_FROM_INCLUDED)
 		{
 			LogPrint ("From identity");
-			optionalData += sizeof (i2p::data::RouterIdentity);
+			optionalData += sizeof (i2p::data::Identity);
 		}	
 
 		// we have reached payload section
@@ -50,6 +57,36 @@ namespace stream
 		LogPrint ("Payload: ", str);
 	}	
 		
+	StreamingDestination m_SharedLocalDestination;	
+	
+	void StreamingDestination::HandleNextPacket (const uint8_t * buf, size_t len)
+	{
+		uint32_t sendStreamID = *(uint32_t *)(buf);
+		auto it = m_Streams.find (sendStreamID);
+		if (it != m_Streams.end ())
+			it->second->HandleNextPacket (buf, len);
+		else
+			LogPrint ("Unknown stream ", sendStreamID);
+	}	
+
+	Stream * StreamingDestination::CreateNewStream (const i2p::data::IdentHash& destination)
+	{
+		/*i2p::data::LeaseSet * leaseSet = i2p::data::netdb.FindLeaseSet (destination);
+		if (!leaseSet)
+		{
+			i2p::data::netdb.RequestDestination (destination);
+			sleep (5); // wait for 5 seconds
+			leaseSet = i2p::data::netdb.FindLeaseSet (destination);
+			if (!leaseSet)
+			{
+				LogPrint ("Couldn't find LeaseSet");
+				return nullptr;
+			}	
+		}	*/
+		Stream * s = new Stream (destination);
+		m_Streams[s->GetRecvStreamID ()] = s;
+		return s;
+	}	
 	
 	void HandleDataMessage (i2p::data::IdentHash * destination, const uint8_t * buf, size_t len)
 	{
@@ -63,12 +100,32 @@ namespace stream
 			decompressor.Put (buf, length);
 			decompressor.MessageEnd();
 			uint8_t uncompressed[2048];
-			int uncomressedSize = decompressor.MaxRetrievable ();
-			decompressor.Get (uncompressed, uncomressedSize);
+			int uncompressedSize = decompressor.MaxRetrievable ();
+			decompressor.Get (uncompressed, uncompressedSize);
 			// then forward to streaming engine
+			// TODO: we have onle one destination, might be more
+			m_SharedLocalDestination.HandleNextPacket (uncompressed, uncompressedSize);
 		}	
 		else
 			LogPrint ("Data: protocol ", buf[9], " is not supported");
 	}	
+
+	I2NPMessage * CreateDataMessage (Stream * s, uint8_t * payload, size_t len)
+	{
+		I2NPMessage * msg = NewI2NPMessage ();
+		CryptoPP::Gzip compressor;
+		compressor.Put (payload, len);
+		compressor.MessageEnd();
+		int size = compressor.MaxRetrievable ();
+		uint8_t * buf = msg->GetPayload ();
+		*(uint16_t *)buf = htobe32 (size); // length
+		buf += 4;
+		compressor.Get (buf, size);
+		buf[9] = 6; // streaming protocol
+		msg->len += size + 4; 
+		FillI2NPMessageHeader (msg, eI2NPData);
+		
+		return msg;
+	}	
 }		
 }	

Streaming.h

@@ -2,7 +2,9 @@
 #define STREAMING_H__
 
 #include <inttypes.h>
+#include <map>
 #include "LeaseSet.h"
+#include "I2NPProtocol.h"
 
 namespace i2p
 {
@@ -20,15 +22,36 @@ namespace stream
 	const uint16_t PACKET_FLAG_ECHO = 0x0200;
 	const uint16_t PACKET_FLAG_NO_ACK = 0x0400;
 
+	class Stream
+	{	
+		public:
+
+			Stream (const i2p::data::IdentHash& destination);
+			uint32_t GetSendStreamID () const { return m_SendStreamID; };
+			uint32_t GetRecvStreamID () const { return m_RecvStreamID; };
+
+			void HandleNextPacket (const uint8_t * buf, size_t len);
+			
+		private:
+
+			uint32_t m_SendStreamID, m_RecvStreamID;
+	};
+	
 	class StreamingDestination
 	{
 		public:
 
+			Stream * CreateNewStream (const i2p::data::IdentHash& destination);
 			void HandleNextPacket (const uint8_t * buf, size_t len);
+
+		private:
+
+			std::map<uint32_t, Stream *> m_Streams;
 	};	
 	
 	// assuming data is I2CP message
 	void HandleDataMessage (i2p::data::IdentHash * destination, const uint8_t * buf, size_t len);
+	I2NPMessage * CreateDataMessage (Stream * s, uint8_t * payload, size_t len);
 }		
 }