Hi Everyone,
I am using SER version
Server: Sip EXpress router (0.9.2 (i386/linux)).
I am initiating a call from a caller sip UA to a callee sip UA and I am receiving the
ACK response to the INVITE from the callee on SER. Before loose_route processing
it looks like this:
ACK sip:2224440133@10.1.10.65:5060 SIP/2.0
Via: SIP/2.0/UDP 172.16.15.52:5060;rport;branch=z9hG4bK83e54f590401584628d473053d1ef8a8
From: <sip:2224440132@xxx.yyy.zzz:5060>;tag=1cac2190
To: <sip:2224440131@xxx.yyy.zzz:5060>;tag=d323038ba423a329i0
Call-ID: 66cb6ba85191e6025ebde2c552177442@172.16.15.52
CSeq: 1 ACK
Contact: <sip:2224440132@172.16.15.52:5060>
Max-Forwards: 70
Route: <sip:10.1.10.65;ftag=1cac2190;lr>,<sip:10.1.10.65;ftag=1cac2190;lr>
Content-Length: 0
After loose_route processing and relaying, the ACK, instead of being routed to the callee
(2224440133) User Agent, it is received back at SER looking like this:
ACK sip:10.1.10.65;ftag=1cac2190;lr SIP/2.0
Record-Route: <sip:10.1.10.65;ftag=1cac2190;lr=on>
Via: SIP/2.0/UDP 10.1.10.65;branch=0
Via: SIP/2.0/UDP 172.16.15.52:5060;rport=5060;branch=z9hG4bK83e54f590401584628d473053d1ef8a8
From: <sip:2224440132@xxx.yyy.zzz:5060>;tag=1cac2190
To: <sip:2224440131@xxx.yyy.zzz:5060>;tag=d323038ba423a329i0
Call-ID: 66cb6ba85191e6025ebde2c552177442@172.16.15.52
CSeq: 1 ACK
Contact: <sip:2224440132@172.16.15.52:5060>
Max-Forwards: 16
Route:
Content-Length: 0
Why is SER routing this ACK request incorrectly?!
Is the syntax of the original ACK generated by the Callee’s UA incorrect?!
I would appreciate any help as I can’t figure it whether there is something wrong
with ACK’s syntax or there is a bug in SER’s loose_route processing?!
Thanks a lot
ramin