[Kamailio-Users] INVITE branch handling for multiple contacts.

[Alex Balashov]

Juha Heinanen wrote:
> Alex Balashov writes:
> 
>  > > canceling of b branch should happen already after step 4, but perhaps 4 and
>  > > 5 take place almost simultaneously and there is some race condition
>  > > related bug in tm module.
>  > 
>  > I think it's just the order of events.  According to my packet capture:
>  > 
>  > - Packet 9, time index 7.953711: 200 OK arrives from A.
>  > - Packet 10, time index 7.954636: 200 OK arrives from B.
>  > - Packet 11, time index 7.969227: Proxy passes 200 OK from A back to SBC.
>  > - Packet 12, time index 7.969268: Proxy originates CANCEL for branch B.
>  > - Packet 13, time index 7.970279: Proxy passes 200 OK from B back to
>  > - SBC.
> 
> as you see, 9 and 10 arrive to proxy very close to each other, which may
> result in a race condition bug causing proxy to send packet 13, which it
> should not do.
> 
> i suggest you file a bug report on this.

OK, at your suggestion, I will.

Do you think that a different thread is generating the CANCEL than the 
one that is passing back to the 200 OK at packet 13 to the SBC?

-- 
Alex Balashov
Evariste Systems
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