First login?
Lost password?
 
 
sctp-discussion AT lists.franken.de 
SCTP Discussions

Text archives Help


Re: [SCTP-Discussion] sctp_send() with large data


Chronological Thread 
  • From: "Sunghwan Ihm" <sihm AT cs.princeton.edu>
  • To: "Michael Tuexen" <Michael.Tuexen AT micmac.franken.de>
  • Cc: sctp-discussion AT sctp.de
  • Subject: Re: [SCTP-Discussion] sctp_send() with large data
  • Date: Sun, 19 Oct 2008 13:53:53 -0400
  • Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:reply-to:sender:to:subject:cc:in-reply-to :mime-version:content-type:content-transfer-encoding :content-disposition:references:x-google-sender-auth; b=TpW8JHtI6W3XwpfPn2YulrJatH1Uz3vimYKG6/1ahITVLZpZQQ+d70fmSPmvgdt+vm XHlXn0TTsiXIYREfhKVs9JtyTpwG0gwIrPWPgo01M3Jaz5l+689uKJ6Vlid40DkWBazO cgnF/YCOx8mF2g1ciYvPBwSumPtzNSBlx15Bg=
  • List-archive: <http://lists.franken.de/pipermail/sctp-discussion>
  • List-id: SCTP Discussions <sctp-discussion.sctp.de>
Hi Michael,

Thank you for your quick response. I googled "sctplib partial
delivery" and I found that the issue was already mentioned in this
list back in 2002. Maybe I should change my code to issue sctp_send()
with small messages, and have the receiver side to reassemble the
original large message. But it would be definitely helpful if
sctp_send() returns an appropriate error message when the message is
larger than the receiver window, and the receiver is unable to send
it. (Even sendFailureNotif() callback was not called.) Anyway I really
appreciate your help again.

Thanks,
Sunghwan

On Sun, Oct 19, 2008 at 6:03 AM, Michael Tuexen
<Michael.Tuexen AT micmac.franken.de>
wrote:
> Hi Sunghwan,
>
> the sctplib does not support the partial delivery API. So
> you can not send messages larger than the receiver window.
>
> Best regards
> Michael
>
> On Oct 18, 2008, at 11:36 PM, Sunghwan Ihm wrote:
>
>> Hello,
>>
>> I'm trying a simple client and server program with sctplib, but I
>> encountered a strange behavior. The server takes a file as an input,
>> and sends the content of the file to the client with sctp_send() call.
>> Since the file size is about 2MB, the server calls sctp_send()
>> multiple times, each with about 128~256KB data depending on the
>> timing. I also checked the return value of each sctp_send() call, and
>> it was all SCTP_SUCCESS. But the problem is that the client can only
>> receive the first sctp chunk, and have no progress since then. That
>> is, on the client side, dataArriveNotif() callback is called only once
>> for the first chunk. I understand that the flow/congestion control can
>> delay the transmission, but it should eventually deliver them anyway.
>> However, in my case it's stuck and there's no progress at all. I would
>> appreciate any comment/help on this. If somebody can provide an
>> example of sending a large chunk, that would be great. I'm using
>> sctplib 1.0.7, and both the client and server machines are fedora core
>> 4.
>>
>> Thanks,
>> Sunghwan
>> _______________________________________________
>> sctp-discussion mailing list
>> sctp-discussion AT sctp.de
>> http://www.sctp.de/mailman/listinfo/sctp-discussion
>>
>
>


Archive powered by MHonArc 2.6.19+.

Top of page