[Serusers] Bug # 2925

[Juha Heinanen]

Jiri Kuthan writes:

 > In case people do keep asking: it is really so, and receivers
 > MUST be able to deal with ACK branch different from branch
 > in INVITE.

that is correct.

 > >The bug report is invalid, ignore it. branch=0 in ACK to a 200
 > >is perfectly valid according to RFC3261. 

but i'm not sure that branch=0 would be valid according to rfc3261,
which says (section 8.1.1):

The branch parameter value MUST be unique across space and time for all
requests sent by the UA.

0 thus hardly qualifies. also

The branch ID inserted by an element compliant with this specification
MUST always begin with the characters  z9hG4bK.

-- juha