[sr-dev] MSRP forwarding problem

[Peter Dunkley]

Hi,

Gavin is on holiday today and Monday morning.  I will rebuild and update
our test system so he can test it Monday afternoon.

Thanks,

Peter

On Fri, 2012-11-09 at 11:09 +0100, Daniel-Constantin Mierla wrote:

> Hello,
> 
> can you try with the patch from this commit?
> 
> http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=b255c406ba09ff229361a3bc14cc1c9fd076b52e
> 
> Cheers,
> Daniel
> 
> On 11/8/12 12:09 PM, Gavin Llewellyn wrote:
> > I've been doing some testing of MSRP clients, using Kamailio as the 
> > MSRP relay.  While testing file transfers, I found that certain files 
> > were getting stuck at a consistent offset, though the offset varied 
> > depending on the file.  With TCP traces, I found that Kamailio 
> > continues to send 200 responses to the file sender, but stops 
> > forwarding the chunks to the receiver.  This seems to continue until 
> > the TCP read buffer overflows, at which point further chunks are 
> > forwarded as normal (the previous chunks are lost).
> >
> > I suspected it may be due to file content, so after narrowing down the 
> > chunk sizes, I've identified the two-character problem sequence: 0a 2d 
> > (a.k.a. line-feed dash).  I can reproduce the issue with a simple, 
> > single-chunk message where the body only contains these two 
> > characters.  Is Kamailio getting this confused with the start of the 
> > MSRP end-line?
> >
> > An example message is below, with all the CRs and LFs made explicit:
> >
> > MSRP wm4qf7sj SEND\r\n
> > To-Path: msrp://192.168.0.74:2855/s.7692.44.867977799;tcp 
> > msrp://192.168.0.74:2855/s.7693.28.862091983;tcp 
> > msrp://192.168.0.144:2855/7k5myvdmx7;tcp\r\n
> > From-Path: msrp://192.168.0.124:2855/8ka1fpl1bw;tcp\r\n
> > Message-ID: 3561360866.5sxkocu6\r\n
> > Success-Report: yes\r\n
> > Failure-Report: yes\r\n
> > Content-Disposition: inline\r\n
> > Byte-Range: 1-2/2\r\n
> > Content-Type: text/plain\r\n
> > \r\n
> > \n-\r\n
> > -------wm4qf7sj$\r\n
> >
> > Regards,
> > Gavin
> >
> >
> > _______________________________________________
> > sr-dev mailing list
> > sr-dev at lists.sip-router.org
> > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev
> 


-- 
Peter Dunkley
Technical Director
Crocodile RCS Ltd
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