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Groups > linux.kernel > #1554622

Re: Problem on SCTP

From Neil Horman <nhorman@tuxdriver.com>
Newsgroups linux.kernel
Subject Re: Problem on SCTP
Date 2017-01-09 20:20 +0100
Message-ID <sXNE6-89F-9@gated-at.bofh.it> (permalink)
References (2 earlier) <sXxzj-6jh-7@gated-at.bofh.it> <sXEUf-2wC-27@gated-at.bofh.it> <sXF3Q-2PI-27@gated-at.bofh.it> <sXHfk-48s-21@gated-at.bofh.it> <sXL9h-6vS-43@gated-at.bofh.it>
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On Tue, Jan 10, 2017 at 12:31:01AM +0800, Sun Paul wrote:
> what kind of information do you need? the whole INIT packet?
> 
That would be ideal.

> On Mon, Jan 9, 2017 at 8:25 PM, Neil Horman <nhorman@tuxdriver.com> wrote:
> > On Mon, Jan 09, 2017 at 06:00:36PM +0800, Sun Paul wrote:
> >> Hi
> >>
> >> the linux router just change the destination, so it can arrive on the
> >> the SERVER.
> >>
> > Please post the relevant snippets from the client and server tcpdump
> > operations
> >
> > Neil
> >
> >> On Mon, Jan 9, 2017 at 5:51 PM, David Laight <David.Laight@aculab.com> wrote:
> >> > From: Sun Paul
> >> >> Sent: 09 January 2017 02:08
> >> >
> >> >> >> I am setting up a lab where the SCTP traffics from  client is passing
> >> >> >> through a linux router before reaching to the SCTP server running
> >> >> >> LKSCTP.
> >> >> >>
> >> >> >> The linux router did not change the source address of the client, so
> >> >> >> when it arrived to the SCTP server, the source address is the oriingal
> >> >> >> one.
> >> >>
> >> >> the INIT chunk arrive on the SERVER, but then no response. the
> >> >> application that using in SERVER is the same as the other test.
> >> >>
> >> >> I noticed one thing in Ethernet frame of the incoming packet on the
> >> >> SERVER compared to the one captured from the client is the LG bit on
> >> >> the source address.
> >> >>
> >> >> The LG bit is set to 0 on the request packet received in the
> >> >> SERVER,but it is 0 from the one originated on the client. willl it be
> >> >> the root cause?
> >> >
> >> > Which addresses are you talking about, and what do you mean by the LG bit?
> >> >
> >> > Is your linux 'router' just routing (ie IP forwarding) or is it doing NAT?
> >> > If it is changing the IP addresses then the addresses inside some SCTP
> >> > chunks also need changing.
> >> >
> >> >         David
> >> >
> >>
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Thread

Problem on SCTP Sun Paul <paulrbk@gmail.com> - 2017-01-06 10:40 +0100
  Re: Problem on SCTP Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> - 2017-01-06 12:50 +0100
    Re: Problem on SCTP Sun Paul <paulrbk@gmail.com> - 2017-01-09 03:10 +0100
  Re: Problem on SCTP Neil Horman <nhorman@tuxdriver.com> - 2017-01-06 13:50 +0100
    Re: Problem on SCTP Sun Paul <paulrbk@gmail.com> - 2017-01-09 03:10 +0100
      Re: Problem on SCTP Sun Paul <paulrbk@gmail.com> - 2017-01-09 03:40 +0100
      RE: Problem on SCTP David Laight <David.Laight@ACULAB.COM> - 2017-01-09 11:00 +0100
        Re: Problem on SCTP Sun Paul <paulrbk@gmail.com> - 2017-01-09 11:10 +0100
          Re: Problem on SCTP Neil Horman <nhorman@tuxdriver.com> - 2017-01-09 13:30 +0100
            Re: Problem on SCTP Sun Paul <paulrbk@gmail.com> - 2017-01-09 17:40 +0100
              Re: Problem on SCTP Neil Horman <nhorman@tuxdriver.com> - 2017-01-09 20:20 +0100
                Re: Problem on SCTP Sun Paul <paulrbk@gmail.com> - 2017-01-10 02:40 +0100
                Re: Problem on SCTP Sun Paul <paulrbk@gmail.com> - 2017-01-10 02:40 +0100
                Re: Problem on SCTP Neil Horman <nhorman@tuxdriver.com> - 2017-01-10 15:40 +0100
                Re: Problem on SCTP Sun Paul <paulrbk@gmail.com> - 2017-01-11 09:40 +0100
                Re: Problem on SCTP Neil Horman <nhorman@tuxdriver.com> - 2017-01-11 14:00 +0100
                Re: Problem on SCTP Sun Paul <paulrbk@gmail.com> - 2017-01-12 10:40 +0100
                RE: Problem on SCTP David Laight <David.Laight@ACULAB.COM> - 2017-01-12 11:00 +0100
                Re: Problem on SCTP Michael Tuexen <Michael.Tuexen@lurchi.franken.de> - 2017-01-12 12:20 +0100
                Re: Problem on SCTP Sun Paul <paulrbk@gmail.com> - 2017-01-13 04:30 +0100
                Re: Problem on SCTP Sun Paul <paulrbk@gmail.com> - 2017-01-13 04:30 +0100
                Re: Problem on SCTP Sun Paul <paulrbk@gmail.com> - 2017-01-13 04:40 +0100
                Re: Problem on SCTP Michael Tuexen <Michael.Tuexen@lurchi.franken.de> - 2017-01-13 10:50 +0100
                Re: Problem on SCTP Michael Tuexen <Michael.Tuexen@lurchi.franken.de> - 2017-01-13 14:20 +0100
                Re: Problem on SCTP Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> - 2017-01-16 19:50 +0100

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