Re: Possible issue in http.c or conn.c

Hi,

Please download and use latest kannel 1.5.0. Issue may have been fixed.

BR,
Nikos
----- Original Message ----- 
From: "Jacob Eiler" <[email protected]>
To: <[email protected]>
Sent: Friday, May 13, 2011 1:24 PM
Subject: Possible issue in http.c or conn.c


> Hi
> 
> I am experiencing a strange issue using an HTTP-based SMSC with Kannel
> 1.4.3. 
> 
> Due to some network issue we had a temporary problem opening connections
> to the smsc. When sending an mt sms the gateway tries to open a
> connection/socket to the smsc, but the operation times out after 5
> seconds. So far all is normal. Then rather than simply give up, the
> gateway tries to write the request data to the socket. Obviously this
> fails and while cleaning up bearerbox panics in a call to
> conn_unregister with a NULL connection.
> 
> I have tried to trace the calls, and as far as I can see this is what
> happens:
> 
> http.c#handle_transaction the transaction state is set to  "connecting".
> For some reason the conn_get_connect_result does not return an error, ad
> consequently send_request is called.
> 
> http.c#send_request tries to write the request data to the connect, but
> fails as the connection is dead. In the error handling send_request
> calls conn_unregister and sets the transaction connection to NULL before
> returning an error.
> 
> Back in handle_transaction the failed call to send_request causes
> handle_transaction to do some error handling and cleanup - again calling
> conn_unregister - this time with a NULL-connection causing the panic.
> 
> The cause of the problem must be the erronenous result from
> conn_get_connect_result (which may be due to the fact that the gateway
> is running under CygWin).
> 
> But even so, should both send_request and handle_transaction try to
> clean up the connection? 
> 
> BR
>  Jacob
> 
>