read more data from socket if available

NTCPSession.cpp

@@ -488,6 +488,9 @@ namespace transport
 			m_ReceiveBufferOffset += bytes_transferred;
 
 			if (m_ReceiveBufferOffset >= 16)
+			{	
+				int numReloads = 0;
+				do
 				{	
 					uint8_t * nextBlock = m_ReceiveBuffer;
 					while (m_ReceiveBufferOffset >= 16)
@@ -502,6 +505,32 @@ namespace transport
 					}	
 					if (m_ReceiveBufferOffset > 0)
 						memcpy (m_ReceiveBuffer, nextBlock, m_ReceiveBufferOffset);
+
+					// try to read more
+					if (numReloads < 5)
+					{	
+						boost::asio::socket_base::bytes_readable command (true);
+						m_Socket.io_control (command);
+						size_t moreBytes = command.get();
+						if (moreBytes)
+						{
+							if (moreBytes > NTCP_BUFFER_SIZE - m_ReceiveBufferOffset)
+								moreBytes = NTCP_BUFFER_SIZE - m_ReceiveBufferOffset;
+							boost::system::error_code ec;
+							moreBytes = m_Socket.read_some (boost::asio::buffer (m_ReceiveBuffer + m_ReceiveBufferOffset, moreBytes));
+							if (ec)
+							{
+								LogPrint (eLogError, "Read more bytes error: ", ec.message ());
+								Terminate ();
+								return;
+							}	
+							m_NumReceivedBytes += moreBytes;
+							m_ReceiveBufferOffset += moreBytes;
+							numReloads++;
+						}	
+					}	
+				}	
+				while (m_ReceiveBufferOffset >= 16);
 				m_Handler.Flush ();
 			}