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On Aug 18, 2011, at 9:28 PM, Subin Martin wrote:

>
> Hello Michael,
>
> Thanks. I have send the tracebacks to you on a separate email.
> I am using the sctp linux kernel implementation. I had complied locally
> sctplib but when application was linked with this library, it was showing
> that kernel level sctp available and it wasnt working. I couldnt remove the
> sctp linux kernel module as it needed that i need to compile the kernel.
I responded to the private mail... You can't use the sctplib when there is an
SCTP kernel
implementation. But I would recommend the kernel implementation anyway...

Best regards
Michael
>
> Regards,
> Subin
>
>
> > Subject: Re: [SCTP-Discussion] SCTP ABORT ("Connection reset by peer")
> > over high latency link
> > From:
> > Michael.Tuexen AT micmac.franken.de
> > Date: Thu, 18 Aug 2011 18:37:16 +0200
> > CC:
> > sctp-discussion AT sctp.de
> > To:
> > subin.martin AT hotmail.com
> >
> > On Aug 18, 2011, at 4:41 PM, Subin Martin wrote:
> >
> > > Hello all,
> > >
> > > I am trying to make a TCP to SCTP protocol translator with SCTP acting
> > > as the transport protocol over a high latency link. This will be
> > > implemented in an ip gateway PC which also does IP header compression
> > > before transmitting it over the high latency link.
> > >
> > > For testing, I made a SCTP client to send 100 packets of 1000byte data
> > > to SCTP server listening on the other side of the high latency link.
> > > Now the issue I am facing is that I can send around 12 to 14 packets of
> > > 1000 bytes properly. After that the "Connection reset by peer" happens
> > > and because of that I am not able to send any more packets. Wireshark
> > > showed me that the otherside is sending an SCTP ABORT packet and thats
> > > why this issue is happening. But this issue is not seen if i try to
> > > send the packets from any PC connected to the gateway. Here everything
> > > goes fine.
> > Hi,
> >
> > which SCTP implementation are you using? The sctplib or the Linux kernel
> > implementation or
> > a different one?
> >
> > I looked at the trace and I don't see any suspicious... Maybe having a
> > wireshark
> > from all interfaces at the sender of the ABORT chunk might help...
> > >
> > > In the gateway I have a tun tap device as the default gateway so all
> > > the packets are received by it and then IP compression is done and send
> > > off as UDP packets to the other gateway over the link. I have also
> > > configured SCTP heartbeat, rto max, min etc to suit the channel delay.
> > > For channel delay I use tc and netem available under linux. The delay
> > > is configured for about 500msec.
> > >
> > > I am not sure if the lack of MAC address in the tun tap device is
> > > causing this issue ie the issue having to do with Linux security than
> > > with the SCTP library. I have attached the wireshark dump(of other
> > > gateway) for the working and failed conditions. Please let me know
> > > where I am going wrong. Also please let me know if anything is not
> > > clear in the issue or if you need more information.
> > I don't think that this kind of stuff would result in sending an ABORT...
> >
> > You can send trace files directly to me, since the mailing list enforces
> > strict
> > size limits...
> >
> > Best regards
> > Michael
> > >
> > > Thanks for your help!
> > >
> > > Regards,
> > > Subin Martin
> > > <working_dump><failed_dump>_______________________________________________
> > > sctp-discussion mailing list
> > > sctp-discussion AT sctp.de
> > > http://www.sctp.de/mailman/listinfo/sctp-discussion
> >

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• [SCTP-Discussion] SCTP ABORT ("Connection reset by peer") over high latency link, Subin Martin, 08/18/2011
  • Re: [SCTP-Discussion] SCTP ABORT ("Connection reset by peer") over high latency link, Michael Tuexen, 08/18/2011
    • RE: [SCTP-Discussion] SCTP ABORT ("Connection reset by peer") over high latency link, Subin Martin, 08/18/2011
      • Re: [SCTP-Discussion] SCTP ABORT ("Connection reset by peer") over high latency link, Michael Tuexen, 08/18/2011
      • RE: [SCTP-Discussion] SCTP ABORT ("Connection reset by peer") over high latency link, Subin Martin, 08/19/2011

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