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Re: [SCTP-Discussion] UDP style -- Continued


Chronological Thread 
  • From: Thomas Dreibholz <dreibh AT exp-math.uni-essen.de>
  • To: discussion AT sctp.de
  • Subject: Re: [SCTP-Discussion] UDP style -- Continued
  • Date: Thu Jul 4 13:12:00 2002
  • List-id: SCTP Discussions <discussion.sctp.de>
  • Organization: University of Essen, Institute for Experimental Mathematics

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Am Donnerstag, 4. Juli 2002 11:26 schrieben Sie:
> I appliend the patch that forced sendreceive variable, info in
> sctpsocketwrapper.cc:ext_sendmsg_singlebuffer, to OR the values
> sinfo_flags. This didn't solve the problem saidly. I get some sort of
> erno...
>
> Saidly I'm having problem tracing what happens, due to that my library is
> compiled with -O2, so I cannot give you any nice details
>
> /Torbjörn
> _______________________________________________
> discussion mailing list
> discussion AT sctp.de
> http://www.sctp.de/mailman/listinfo/discussion


In your program fragment, there are no buffers given:
  msg->msg_iov = NULL;
  msg->msg_iovlen = 0;

This causes ext_sendmsg_singlebuffer() to skip the call to
SCTPSocket::sendTo():
if((msg != NULL) && (msg->msg_iov != NULL) && (msg->msg_iov->iov_base !=
NULL)) {

For the next version, I will fix this problem.


Try the following:
char buf;
struct iovec iov = { (char*)&buf, 0 };
...
msg->msg_iov = &iov;
msg->msg_iovlen = 1;

In sctpsocket.cc, the lines from about 44 to 58 consist of "#define
PRINT_..." which are commented out. Uncomment all these lines and you will
get debug messages about the AutoConnect-Status. You should now see a message
"AutoConnect: Shutdown of outgoing association A<assocID>..." if it works.


Please mail me whether or not this change solves the problem. If it does not
solve the problem, please mail me the source of your program and instructions
how to use it. Then, I can look for the error.


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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