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On Wednesday 04 December 2002 10:57, Oon Heok Kee wrote:
> Hi!
>
> Does anyone have any idea what's the default receiver buffer size?

See the file adaptation.c, function adl_open_sctp_socket(),
around lines 674. It is read by a getsockopt() function.
YMMV.

> Is there any way to change it (even modifying the stack itself is fine
> with me)? If there is, what do I need to change?

See the file adaptation.c, function adl_set_receiveBufferSize(),
around lines 403. It uses a setsockopt() function.
YMMV (as it depends on the OS used, and maybe other things).


> I'm trying to stream video using SCTP but I see that the default
> receiver buffer 32768 bytes, which is far too small, so I need to increase
> it.

Since that only changes the Raw IP Layer socket buffers, you also
need to modify the file distribution.c, around line 1784, where it
says:
sctpInstance->default_myRwnd = myRWND/2;
and set it there to a useful value.

Please note however, that we found out that with a too large buffer
announced and a high speed network, the (RAW IP socket) buffer will
overflow, and you will see strange packet losses.

Hope that helps,

Andreas

P.S.: Please let me know of the results of your tests as that is
very interesting for me to know.
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• [SCTP-Discussion] Buffer size, Oon Heok Kee, 12/04/2002
  • Re: [SCTP-Discussion] Buffer size, Andreas Jungmaier, 12/04/2002
    • Re: [SCTP-Discussion] Buffer size, Michael Tüxen, 12/04/2002
  • <Possible follow-up(s)>
  • Re: [SCTP-Discussion] Buffer size, Oon Heok Kee, 12/05/2002
    • Re: [SCTP-Discussion] Buffer size, Michael Tüxen, 12/05/2002
  • Re: [SCTP-Discussion] Buffer size, Oon Heok Kee, 12/05/2002
    • Re: [SCTP-Discussion] Buffer size, Michael Tüxen, 12/05/2002
  • Re: [SCTP-Discussion] Buffer size, Oon Heok Kee, 12/08/2002

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