choose streaming destination for destination port

Destination.cpp

@@ -371,11 +371,24 @@ namespace client
 		switch (buf[9])
 		{
 			case PROTOCOL_TYPE_STREAMING:
+			{
 				// streaming protocol
+				if (toPort) // not null
+				{
+					auto it = m_StreamingDestinationsByPorts.find (toPort);
+					if (it != m_StreamingDestinationsByPorts.end ())
+					{
+						// found destination for specific port
+						it->second->HandleDataMessagePayload (buf, length);
+						break;
+					}
+				}	
+				// if port is zero, or destination for port not found, use default
 				if (m_StreamingDestination)
 					m_StreamingDestination->HandleDataMessagePayload (buf, length);
 				else
 					LogPrint ("Missing streaming destination");
+			}
 			break;
 			case PROTOCOL_TYPE_DATAGRAM:
 				// datagram protocol

Destination.h

@@ -130,7 +130,8 @@ namespace client
 			uint32_t m_PublishReplyToken;
 			std::set<i2p::data::IdentHash> m_ExcludedFloodfills; // for publishing
 			
-			std::shared_ptr<i2p::stream::StreamingDestination> m_StreamingDestination;
+			std::shared_ptr<i2p::stream::StreamingDestination> m_StreamingDestination; // default
+			std::map<uint16_t, std::shared_ptr<i2p::stream::StreamingDestination> > m_StreamingDestinationsByPorts;
 			i2p::datagram::DatagramDestination * m_DatagramDestination;
 	
 			boost::asio::deadline_timer m_PublishConfirmationTimer, m_CleanupTimer;