[Users] Problem with ACK's (branch=0)

[Tavis P]

A patch was just released that pertains to this issue
http://bugs.sip-router.org/browse/SER-44?page=history


Rodrigo P. Telles wrote:

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>Hi,
>
>I posted the same issue in serusers list and nobody answers too.
>Seems that you are right!
>Bad for us.
>
>regards.
>- --
>============================================
>Rodrigo P. Telles <telles at devel.it>
>TI Manager
>Devel-IT - http://www.devel.it
>============================================
>
>reticent wrote:
>  
>
>>I was one of the initial reporters of this "bug"
>>
>>In my case the issue was the use of Strict routing in the ACK or BYE
>>message that somehow wasn't caught by the "loose_route()" statement. 
>>The UAC sends the messages with a URI of the SER proxy.
>>
>>I didn't get a very good reception to my request, i the feeling i got
>>was that it was passed off an as not important or uninteresting.  In my
>>case i resolved the issue by upgrading the UAC that was sending the
>>ACK/BYE.
>>
>>I've seen at least 5-6 people report this, with the varying responses
>>(mostly that there was no issue, when it looked to me that there was). 
>>I hope someone who understands the necessary specifications and also SER
>>would look into this and quash the issue once and for all (even if just
>>to diffinitively identify it)
>>
>>I would be interested in spending some time to try and get to the bottom
>>of the issue, i will dig up the data from previous emails this afternoon
>>and see if i can assist.
>>
>>
>>Rodrigo P. Telles wrote:
>>
>>Bogdan,
>>
>>Fistrly, thanks for your answer!
>>Reading some old posts about 'branch=0' I found some one saying that
>>it happend
>>because SER forward statelessly, but I'm using "t_relay()" and I
>>suppose it's a
>>statefull function, does'n it?
>>I saw this question many times in serusers maillist but no one answer it!
>>According with RFC3261 'branch=0' is not a valid branch ID (I know I
>>can use
>>syn_branch=0)!
>>
>>Best regards.
>>--
>>============================================
>>Rodrigo P. Telles <telles at devel.it>
>>Diretor de Tecnologia
>>Devel-IT - http://www.devel.it
>>============================================
>>
>>Bogdan-Andrei Iancu wrote:
>> 
>>
>>    
>>
>>>>>Hi Rodrigo,
>>>>>
>>>>>as I see in that email, the problem is actually a broken ACK which
>>>>>doesn't match the INVITE transaction and statelessly loops on the proxy
>>>>>- when statelessly fwded, the ACK gets branch=0 param in VIA.
>>>>>
>>>>>so, what is your problem? - the actually presents of branch=0 or why it
>>>>>gets there?
>>>>>
>>>>>regards,
>>>>>bogdan
>>>>>
>>>>>Rodrigo P. Telles wrote:
>>>>>
>>>>>Hi folks,
>>>>>
>>>>>I've been experiencing some troubles with ACK's with branch=0.
>>>>>I found a thread about it but I didn't find a 'solution' folowing the
>>>>>thread.
>>>>>http://mail.iptel.org/pipermail/serdev/2005-April/004296.html
>>>>>
>>>>>Can some one point me to the correct answer for that question?
>>>>>
>>>>>Thanks in advance.
>>>>>-- 
>>>>>============================================
>>>>>Rodrigo P. Telles <telles at devel.it>
>>>>>TI Manager
>>>>>Devel-IT - http://www.devel.it
>>>>>============================================
>>>>>  
>>>>>          
>>>>>
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>>http://openser.org/cgi-bin/mailman/listinfo/users
>> 
>>
>>
>> 
>>
>>
>>
>>
>>    
>>
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