[Users] branch parameter in ACK set to zero?

Bogdan-Andrei Iancu bogdan at voice-system.ro
Wed May 30 17:18:17 CEST 2007


Hi Tim,

the VIA branch param must not be 0, indeed. Could you provide an network 
trace for the entire call and the debug log for level 9?

regards,
bogdan

Tim Madorma wrote:
> Hi,
>
> In testing with OpenSER 1.2 I noticed that the branch parameter of the
> Via in the ACK to 200 OK has a value of zero. This does not seem
> right. From 16.6 of RFC-3261:
>
>         The proxy MUST insert a Via header field value into the copy
>         before the existing Via header field values.  The construction
>         of this value follows the same guidelines of Section 8.1.1.7.
>         This implies that the proxy will compute its own branch
>         parameter, which will be globally unique for that branch, and
>         contain the requisite magic cookie.
>
> Please advise.
>
> thanks,
> Tim
>
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