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Re: [SCTP-Discussion] Connect does not return on failure...


Chronological Thread 
  • From: Thomas Dreibholz <dreibh AT exp-math.uni-essen.de>
  • To: Harold Hunt <harold_diameter AT yahoo.com>, discussion AT sctp.de
  • Subject: Re: [SCTP-Discussion] Connect does not return on failure...
  • Date: Mon Mar 24 12:47:01 2003
  • List-id: SCTP Discussions <discussion.sctp.de>
  • Organization: University of Essen, Institute for Experimental Mathematics
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Am Montag, 24. März 2003 11:05 schrieb Harold Hunt:
> Hello,
>
> I am using socketapi-1.0.1 and sctplib-1.0.0-pre19 . When I run the cpp
> socket api sample programs. i.e sctpmultiserver and sctpterminal. The
> sctpterminal, which is an example of sctp client does not return if the
> sctpmultiserver is not listening. It just says "connecting...." for a long
> time. What could be the problem ?..Should the Connect call not return on
> failure ??

I assume you try to connect to a port the server is not listening to. The
RFC2960-compliant behaviour would be that the server sends back an ABORT
message. This would create a problem when more than one instance are running
on the same host. For example, if you start server A on port 1000 and server
B on port 2000, server B would immediately send an abort when it sees an INIT
message to server A (port 1000). Therefore, the socket API's default
behaviour is to simply ignore out of the blue (OOTB) packets and do nothing.

To turn OOTB handling on, add a call of "sctp_enableOOTBHandling(1)" to both,
client and server. Then, you will get the desired behaviour.


Best regards
- --
=======================================================================
Dipl.-Inform. Thomas Dreibholz

University of Essen, Room ES210
Inst. for Experimental Mathematics Ellernstraße 29
Computer Networking Technology Group D-45326 Essen/Germany
- -----------------------------------------------------------------------
E-Mail:
dreibh AT exp-math.uni-essen.de
Homepage: http://www.exp-math.uni-essen.de/~dreibh
=======================================================================
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