[asterisk-dev] dialog matching

[Klaus Darilion]

Johansson Olle E schrieb:
> 20 dec 2007 kl. 10.17 skrev Klaus Darilion:
> 
>> Hi Steve!
>>
>> pedantic in Asterisk is buggy - regardless if it is turned on or off.
> The first commit I did to chan_sip3 was to remove pedantic. Totally.
> 
>> Current problems with dialog matching with pedantic=on: Asterisk  
>> learns
>> the totag from the first provisional response and ignores responses  
>> with
>> different to-tag although they belong to the same transaction ->  
>> causes
>> problems if the outgoing SIP call is forked and causes multiple
>> early-dialog.
> And we don't understand that we can actually get several 200 OK
> with different To-tags and that this means that we have multiple  
> dialogs.

Multiple 200 ok are rare (race condition) as the proxy which does the 
forking has to handle it - but they may happen.

IMO this is easy to handle: If multiple 200 OK is received just send a 
BYE to all 200 OK except the first one.

regards
klaus

> 
> have to little bandwidth to go deeper today, but will come back soon.
> 
> /O
> 
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