No, you are not dealing with a buggy client. As Carlos pointed out, you are dealing with standard SIP loose routing mechanism. Time to read the RFC :)
Regards, Ovidiu Sas On Wed, Mar 5, 2014 at 2:24 PM, Marc Soda <ms...@coredial.com> wrote: > Yeah, I think I'm dealing with a buggy client... > > Thanks all. > > > On Wed, Mar 5, 2014 at 1:57 PM, Carlos Ruiz Díaz <carlos.ruizd...@gmail.com> > wrote: >> >> Why is erroneous to have the contact header with the backend IP? >> >> With the record-route on the 200 Ok, the ACK should be directed to the >> backend IP, but containing a route header pointing to the Kamailio IP. >> Kamailio will loose_route() this request and send it to the backend server >> as expected. >> >> Regards, >> >> >> On Wed, Mar 5, 2014 at 3:53 PM, Marc Soda <ms...@coredial.com> wrote: >>> >>> Thanks Olle. I am calling record_record() on the initial INVITE. In >>> fact, the OK has a Record-Route header: >>> >>> 1.1.1.1 is the endpoint >>> 2.2.2.2 is the kamailio proxy >>> 3.3.3.3 is the backend server >>> >>> SIP/2.0 200 OK >>> Via: SIP/2.0/UDP >>> 1.1.1.1:60077;rport=46110;branch=z9hG4bK-d8754z-eb9768c7e3a2d1e7-1---d8754z- >>> Record-Route: <sip:2.2.2.2;lr=on;ftag=db634167;nat=yes> >>> From: <sip:sip7878_s...@edge.domain.com;transport=UDP>;tag=db634167 >>> To: <sip:2155555...@edge.coredial.com;transport=UDP>;tag=as3f9cf263 >>> Call-ID: MzI5YTA3YmRkNzFiZjhhZTRkNTc2OGE1ZTc5ZjdjMmM. >>> CSeq: 2 INVITE >>> User-Agent: CoreDialPBX >>> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO >>> Supported: replaces >>> Contact: <sip:21555555555@3.3.3.3> >>> Content-Type: application/sdp >>> Content-Length: 266 >>> >>> v=0 >>> o=root 13486 13487 IN IP4 3.3.3.3 >>> s=session >>> c=IN IP4 3.3.3.3 >>> t=0 0 >>> m=audio 29990 RTP/AVP 0 8 101 >>> a=rtpmap:0 PCMU/8000 >>> a=rtpmap:8 PCMA/8000 >>> a=rtpmap:101 telephone-event/8000 >>> a=fmtp:101 0-16 >>> a=silenceSupp:off - - - - >>> a=ptime:20 >>> a=sendrecv >>> >>> I don't think 3.3.3.3 should show up anywhere, it should be rewritten to >>> 2.2.2.2. >>> >>> >>> On Wed, Mar 5, 2014 at 1:34 PM, Olle E. Johansson <o...@edvina.net> wrote: >>>> >>>> >>>> On 05 Mar 2014, at 18:30, Marc Soda <ms...@coredial.com> wrote: >>>> >>>> I have Kamailio setup as a proxy in front of a backend server >>>> (Asterisk). When I make a call through the proxy, the Contact header in >>>> the >>>> 200 OK that is returned to the client has the IP of the backend server in >>>> it. Thus, the client is sending it's ACK directly to the backend server. >>>> >>>> Is there a special method to rewrite the Contact header to be Kamailio's >>>> IP? >>>> >>>> Check record_route() in the default configuration script. You need to >>>> add a route set by using record_route() in the initial transaction. >>>> >>>> Cheers, >>>> /O >>>> >>>> >>>> Where is a good place in the config to do this? (my config is loosely >>>> based on this: >>>> http://kb.asipto.com/asterisk:realtime:kamailio-4.0.x-asterisk-11.3.0-astdb) >>>> >>>> Thanks! >>>> Marc >>>> >>>> _______________________________________________ >>>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list >>>> sr-users@lists.sip-router.org >>>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users >>>> >>>> >>>> >>>> _______________________________________________ >>>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list >>>> sr-users@lists.sip-router.org >>>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users >>>> >>> >>> >>> _______________________________________________ >>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list >>> sr-users@lists.sip-router.org >>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users >>> >> >> >> >> -- >> Carlos >> http://caruizdiaz.com >> http://ngvoice.com >> +595981146623 >> >> _______________________________________________ >> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list >> sr-users@lists.sip-router.org >> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users >> > > > > -- > > Marc Soda, Sr. Systems Engineer > CoreDial, LLC | www.coredial.com > > 1787 Sentry Parkway West, Building 16, Suite 100, Blue Bell, PA 19422 > Office: (215) 297-4400 x203 | Fax: (215) 297-4401 | Email: > ms...@coredial.com > > - - - - - > > The information transmitted is intended only for the person or entity to > which it is addressed and may contain confidential and/or privileged > material. Any review, retransmission, dissemination or other use of, or > taking of any action in reliance upon, this information by persons or > entities other than the intended recipient is prohibited. If you received > this in error, please contact the sender and delete the material from any > computer. > > _______________________________________________ > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list > sr-users@lists.sip-router.org > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users > -- VoIP Embedded, Inc. http://www.voipembedded.com _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
