[Freeswitch-users] SIP Re-invite

[David Knell]

I'd be suspicious of:
(a) the CSeq going backwards from 4 to 3 between re-invites 2 and 3;
(b) the branch on the Via tag changing
(c) (not sure about this one) the SDP session ID and version changing
for what's the same session.

--Dave


> Anthony,
>  
> I have pasted the invite sip trace here:
> http://pastebin.freeswitch.org/11536
> Please advise if you need further info.
>  
> Thank you.
> 
> 
> 
> ______________________________________________________________________
> From: Anthony Minessale <anthony.minessale at gmail.com>
> To: freeswitch-users at lists.freeswitch.org
> Sent: Wed, December 16, 2009 3:42:48 PM
> Subject: Re: [Freeswitch-users] SIP Re-invite
> 
> that means the invite is not matching the call dialog
> compare the via tags and call-id etc
> 
> 
> On Wed, Dec 16, 2009 at 5:29 PM, DJB <djbinter at yahoo.com> wrote:
>         We have a customer that we are sending calls to off the FS and
>         here is the issue: 
>         
>          
>         
>         Call is initially setup fine and they send a first re-invite
>         with media 0.0.0.0 to place the caller on hold. FS sends a 200
>         ok to this first re-invite fine 
>         
>          
>         
>         They then send a second re-invite with their media IP to cut
>         through media and the FS sends a 200 OK to this fine. At this
>         point the call is fine 
>         
>          
>         
>         30 minutes later they send a third re-invite because according
>         to them it is strictly for the purpose of “keep alive” per RFC
>         4028. This third re-invite has the exact same media IP and UDP
>         pot information as the second re-invite does. The problem is
>         FS does not respond to this third re-invite AT ALL. It doesn’t
>         send a 100 trying a 200 OK nothing so this causes the call to
>         be dropped as the other end does not recieve a response from
>         FS.  
>         
>         
>         One more thing, we did not see the third re-invite in sofia
>         siptrace, but we do see it in ethereal, which is kind of odds.
>         
>         
>         We are running FreeSWITCH Version 1.0.trunk (15979) in bypass
>         media mode.
>         
>         
>         Thank you very much.
>         
>         
>         
>         
>         
>         
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> 
> 
> 
> -- 
> Anthony Minessale II
> 
> FreeSWITCH http://www.freeswitch.org/
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> 
> AIM: anthm
> MSN:anthony_minessale at hotmail.com
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> 
> FreeSWITCH Developer Conference
> sip:888 at conference.freeswitch.org
> iax:guest at conference.freeswitch.org/888
> googletalk:conf+888 at conference.freeswitch.org
> pstn:+19193869900
> 
> 
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