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Hi Julio,

yes this is correct. But when the message is larger than the announced receiver window of the
receiver the association will just stop transferring data. This is because there is no
partial delivery API.

If the receiver announces 64K, but the user on the sender side passes a 128K message, it
will be fragmented and the first 64 K will be transferred. Then the receiver has no more
space but also can not free space because it can not deliver the incomplete message. So
the association is stalled.

The solution is to deliver the message in parts on the receiver side. But this is not
implemented.

Best regards
Michael

On Oct 13, 2006, at 2:41 PM, Julio Kriger wrote:

Hi Michael!
Correct me I get it wrong, but I understand that I can send a message of any length, and internaly sctplib cut the message on parts (or chuncks) that are deliverables to the sender. I understand that this parts or chuncks fit on a raw socket, are sent to the receiver and later all parts or chuncks are put together to obtain the original (any length) message.
I will try to look for this bug you say, and tell what I found.
Regards,
Julio



On 10/13/06, Michael Tuexen < Michael.Tuexen AT micmac.franken.de> wrote:I'm not aware of a limit on the sender side, so this most likely is a
bug. However,
since the sctplib does not implement a partial delivery API, the
longest message
you can transfer is about the size of the receiver window. This
basically depends
to the receive buffer space for raw sockets and is about 20-64 KByte
on BSD systems.
Way smaller then a MB...

Best regards
Michael

On Oct 12, 2006, at 6:17 PM, Julio Kriger wrote:

> Hi!
> What is the maximum message length the SCTP_send function accept?
> I'm trying it with 4 threads sending 1MB message each, and it freeze.
>
> Also I get the following error message:
>
> AF_INET : sendto()=-1 !
>
> what do this mean? TIA
>
> Regards,
> Julio
>
> --
> --
> From the moment I picked your book up until I laid it down, I was
> convulsed with laughter. Someday I intend reading it.
> Groucho Marx
> ----------------------------
> Julio Kriger
>
mailto:juliokriger AT gmail.com




--
--
From the moment I picked your book up until I laid it down, I was convulsed with laughter. Someday I intend reading it.
Groucho Marx
----------------------------
Julio Kriger
mailto:juliokriger AT gmail.com

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• [SCTP-Discussion] max length of a single message, Julio Kriger, 10/12/2006
  • Re: [SCTP-Discussion] max length of a single message, Michael Tuexen, 10/13/2006
    • Re: [SCTP-Discussion] max length of a single message, Julio Kriger, 10/13/2006
      • Re: [SCTP-Discussion] max length of a single message, Michael Tuexen, 10/14/2006
        • Re: [SCTP-Discussion] max length of a single message, Julio Kriger, 10/14/2006
          • Re: [SCTP-Discussion] max length of a single message, Michael Tuexen, 10/15/2006

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