Hi, I wanted to know if any unsupported parameter in SIP Header comes in INVITE request which is not part of any SIP standard then while framing the response is UAS obliged to include the same unsupported parameter in the header ?
For ex see below INVITE receiving and 180 Ringing sent, observe the missing "yop" parameter from Via and Record-Route header in SIP 180 Ringing message. UAS SIP stack doesn't understand the "yop" parameter and hence discarded it. Can someone point me to any RFC section which says clearly that whatever my UAS stack is doing is correct or not. INVITE ===== INVITE sip:+255990255@10.205.9.59;user=phone SIP/2.0 Content-Length:240 From:<sip:849999...@vm.co.mz;user=phone>;tag=161g50VWZg3h93B0 To:<sip:+255990255@10.205.9.59;user=phone> Via:SIP/2.0/UDP vm.co.mz:5060;branch=z9hG4bKC.AAfC7YVfjVWjCW;yop=00.00.865C4D8C.0000.701F Call-ID:23555F4527E23AAAED1AB62B@1f70ffffffff CSeq:1 INVITE Max-Forwards:69 Route:<sip:10.205.9.59:5060;lr> Record-Route:<sip:AAQAAH1twAABkAAAAaAAAfO4K@10.201.233.164:5060;yop=00.00.865C4D8C.0000.701F;lr> Request-Disposition:no-fork P-Asserted-Identity:<sip:849999...@vm.co.mz;user=phone>,<tel:849999015;phone-context=+258> Session-Expires:1800;refresher=uac Contact:<sip:10.201.233.164:5060;yop=00.00.865C4D8C.0000.701F> Supported:100rel,timer,eventlist,norefersub Allow:ACK,BYE,CANCEL,INFO,INVITE,OPTIONS,PRACK,REFER,UPDATE P-Charging-Vector:icid-value=UogECGAADJxQWwAAANxXzAUfcAoF;icid-generated-at=10.201.233.164;orig-ioi=vm.co.mz P-Early-Media:supported Content-Type:application/sdp Content-Disposition:session;handling=required ... 180 Ringing ========= SIP/2.0 180 Ringing Via: SIP/2.0/UDP vm.co.mz:5060;branch=z9hG4bKC.AAfC7YVfjVWjCW To: <sip:+255990255@10.205.9.59;user=phone>;tag=2616508833 From: <sip:849999...@vm.co.mz;user=phone>;tag=161g50VWZg3h93B0 Call-ID: 23555F4527E23AAAED1AB62B@1f70ffffffff CSeq: 1 INVITE Max-Forwards: 69 Record-Route: <sip:AAQAAH1twAABkAAAAaAAAfO4K@10.201.233.164:5060;lr> Contact: <sip:+255990255@10.205.9.59:5060> Content-Type: application/sdp Content-Length: 184 ... Thanks, Gaurav Khare ________________________________ DISCLAIMER: The information in this message is confidential and may be legally privileged. It is intended solely for the addressee. Access to this message by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, or distribution of the message, or any action or omission taken by you in reliance on it, is prohibited and may be unlawful. Please immediately contact the sender if you have received this message in error. Further, this e-mail may contain viruses and all reasonable precaution to minimize the risk arising there from is taken by OnMobile. OnMobile is not liable for any damage sustained by you as a result of any virus in this e-mail. All applicable virus checks should be carried out by you before opening this e-mail or any attachment thereto. Thank you - OnMobile Global Limited. _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
