Streaming added

Streaming.cpp

@@ -0,0 +1,74 @@
+#include <endian.h>
+#include <string>
+#include <cryptopp/gzip.h>
+#include "Log.h"
+#include "RouterInfo.h"
+#include "Streaming.h"
+
+namespace i2p
+{
+namespace stream
+{
+	void StreamingDestination::HandleNextPacket (const uint8_t * buf, size_t len)
+	{
+		const uint8_t * end = buf + len;
+		buf += 4; // sendStreamID
+		buf += 4; // receiveStreamID
+		buf += 4; // sequenceNum
+		buf += 4; // ackThrough
+		int nackCount = buf[0];
+		buf++; // NACK count
+		buf += 4*nackCount; // NACKs
+		buf++; // resendDelay 
+		uint16_t flags = be16toh (*(uint16_t *)buf);
+		buf += 2; // flags
+		uint16_t optionalSize = be16toh (*(uint16_t *)buf);	
+		buf += 2; // optional size
+		const uint8_t * optionalData = buf;
+		buf += optionalSize;
+
+		// process flags
+		if (flags & PACKET_FLAG_SYNCHRONIZE)
+		{
+			LogPrint ("Synchronize");
+		}	
+
+		if (flags & PACKET_FLAG_SIGNATURE_INCLUDED)
+		{
+			LogPrint ("Signature");
+			optionalData += 40;
+		}	
+
+		if (flags & PACKET_FLAG_FROM_INCLUDED)
+		{
+			LogPrint ("From identity");
+			optionalData += sizeof (i2p::data::RouterIdentity);
+		}	
+
+		// we have reached payload section
+		std::string str((const char *)buf, end-buf);
+		LogPrint ("Payload: ", str);
+	}	
+
+
+	void HandleDataMessage (i2p::data::IdentHash * destination, const uint8_t * buf, size_t len)
+	{
+		uint32_t length = be32toh (*(uint32_t *)buf);
+		buf += 4;
+		// we assume I2CP payload
+		if (buf[9] == 6) // streaming protocol
+		{	
+			// unzip it
+			CryptoPP::Gunzip decompressor;
+			decompressor.Put (buf, length);
+			decompressor.MessageEnd();
+			uint8_t uncompressed[2048];
+			int uncomressedSize = decompressor.MaxRetrievable ();
+			decompressor.Get (uncompressed, uncomressedSize);
+			// then forward to streaming engine
+		}	
+		else
+			LogPrint ("Data: protocol ", buf[9], " is not supported");
+	}	
+}		
+}