Hi In my opinion 100rel extension should be ignored when received in an INFO request. The rational behind this is 100rel extension is required for the reliable provisional responses for the dialog creating SIP requests, for INVITE method it is described in RFC 3262.
regards Abhishek Dhammawat Aricent ________________________________________ From: sip-implementors-boun...@lists.cs.columbia.edu [sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of Kashin Mihail [mkas...@nvisiongroup.ru] Sent: Wednesday, June 17, 2009 6:40 PM To: sip-implementors@lists.cs.columbia.edu Subject: [Sip-implementors] 100Rel from UAS Hi, everybody! Is it legitimate for UAS to request reliable provisional response option after receiving INVITE without Required or Supported headers. In my case the flow is like this Inv (no 100Rel*)-> <-100 Trying <- 180 Trying (no 100Rel) ** <-INFO (Required:100Rel) 200OK(no 100Rel) ............ * - Means no 100Rel indication in the message ** - At this moment UAS (which is actually a B2BUA) establishes a session with another proxy where it uses 100Rel and now it is trying to "back-enable" 100Rel in our call leg. So is it OK for UAC to answer 200OK to INFO without 100Rel indication? Or should it send 200OK with Req:100Rel and then initiate reliable prov. Response procedure? Thanks in advance to every answerer. Mike _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors "DISCLAIMER: This message is proprietary to Aricent and is intended solely for the use of the individual to whom it is addressed. It may contain privileged or confidential information and should not be circulated or used for any purpose other than for what it is intended. If you have received this message in error,please notify the originator immediately. If you are not the intended recipient, you are notified that you are strictly prohibited from using, copying, altering, or disclosing the contents of this message. Aricent accepts no responsibility for loss or damage arising from the use of the information transmitted by this email including damage from virus." _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
