check send frame error code

libi2pd/NTCP2.cpp

@@ -464,10 +464,18 @@ namespace transport
 				LogPrint (eLogDebug, "NTCP2: padding length ", paddingLen);
 				// TODO: check tsB
 				if (paddingLen > 0)
+				{
+					if (paddingLen <= 287 - 64) // session created is 287 bytes max
 					{
 						boost::asio::async_read (m_Socket, boost::asio::buffer(m_Establisher->m_SessionCreatedBuffer + 64, paddingLen), boost::asio::transfer_all (),
 							std::bind(&NTCP2Session::HandleSessionCreatedPaddingReceived, shared_from_this (), std::placeholders::_1, std::placeholders::_2));
 					}
+					else
+					{
+						LogPrint (eLogWarning, "NTCP2: SessionCreated padding length ", (int)paddingLen,  " is too long");
+						Terminate ();
+					}
+				}
 				else
 					SendSessionConfirmed ();
 			}
@@ -677,6 +685,7 @@ namespace transport
 	{
 		if (ecode)
 		{
+			if (ecode != boost::asio::error::operation_aborted)
 				LogPrint (eLogWarning, "NTCP2: receive length read error: ", ecode.message ());
 			Terminate ();
 		}
@@ -702,6 +711,7 @@ namespace transport
 	{
 		if (ecode)
 		{
+			if (ecode != boost::asio::error::operation_aborted)
 				LogPrint (eLogWarning, "NTCP2: receive read error: ", ecode.message ());
 			Terminate ();
 		}
@@ -804,15 +814,23 @@ namespace transport
 	}
 
 	void NTCP2Session::HandleNextFrameSent (const boost::system::error_code& ecode, std::size_t bytes_transferred)
+	{
+		m_IsSending = false;
+		delete[] m_NextSendBuffer; m_NextSendBuffer = nullptr;
+		
+		if (ecode)
+		{
+			LogPrint (eLogWarning, "NTCP2: Couldn't send frame ", ecode.message ());
+		}	
+		else
 		{	
 			m_LastActivityTimestamp = i2p::util::GetSecondsSinceEpoch ();
 			m_NumSentBytes += bytes_transferred;
 			i2p::transport::transports.UpdateSentBytes (bytes_transferred);
-		delete[] m_NextSendBuffer; m_NextSendBuffer = nullptr;
 			LogPrint (eLogDebug, "NTCP2: Next frame sent");
-		m_IsSending = false;
 			SendQueue ();
 		}	
+	}
 
 	void NTCP2Session::SendQueue ()
 	{