| < Previous by Date | Date Index | Next by Date > |
| < Previous in Thread | Thread Index | Next in Thread > |
|
Hmm – that is an interesting problem. Resip/dum is
behaving to spec – UA’s are supposed to do merge request detection
in this way. But this detection causes problems for B2BUA’s in the
scenario you described. Maybe we should have an option for B2BUA’s
that allows including the request URI in merge request detection. I’d be interested to hear from others on what they
think/know is correct solution to this is. BTW: You mentioned that if you include the request uri in
the merge request matching, then you still get a loop detected – I don’t
quite understand why that is happening. Scott From:
resiprocate-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:resiprocate-devel-bounces@xxxxxxxxxxxxxxxxxxx]
On Behalf Of Steven Coule We
have a problem with reSIProcate when operating as a B2BUA between UACs and a
proxy IP PBX such as SipX. The
scenario is: The
standard INVITE call flow is from (1) UAC1 -> (2) B2BUA -> (3) SipX
-> (4) B2BUA -> (5) UAC2 Our
B2BUA is registrar for UAC1 and UAC2, and the B2BUA also registers to SipX with
the ids of UAC1 and UAC2. SipX therefore believes both UAC1 and UAC2 are at the
B2BUA … There is only one B2BUA, (2) and (4) represent flows through the
B2BUA. This
works ok for a normal call. However if at step 4, the INVITE from SIPX to B2BUA
is rejected with a 302 to redirect the call to UAC3 (also registered through
our B2BUA) , SipX then sends another INVITE to the B2BUA with an updated URI
for UAC3 but with the To & From headers unchanged. reSIProcate
then returns an error 482 request merged to SipX … there was some
commented out code in MergedRequestKey which appeared to check for a change in
the request URI but adding this check again did not resolve the issue, 482 was
still returned. We
are wondering whether the problem is caused because we haven’t cancelled
stage (5) before returning the 302 to SipX … Any
ideas as to why this happens? I have an ethereal trace available if that
helps! Steve Coule Envox Worldwide Envox Worldwide – A Global Leader in Voice Solutions |