I use the entire "o" line of previous INVITE and compare( string comparison) with the new INVITE's "o" line from SDP. If they are identical then it's Session Timer re-INVITE. If they are different then it could be for call hold or call retrieve or media modification of that call.
-----Original Message----- From: Brett Tate [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 25, 2005 3:30 PM To: 'Ramesh Ramamurthy'; [email protected] Subject: RE: [Sip-implementors] follow-up to Session Timer question. > Can we use the SDP Version field as a > reliable source of information to detect > a change in the SDP instead of having > to go through the entire SDP data. Per RFC2327 section 6, the whole origin field ("o=") of the SDP is used to form the globally unique identifier. For an SDP change to be noticed, some portion of the origin line must also changed. _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors NOTE: This message, including any attachments, may include privileged, confidential and/or inside information. Any distribution or use of this communication by anyone other than the intended recipient(s) is strictly prohibited and may be unlawful. If you are not the intended recipient, please notify the sender by replying to this message and then delete it from your system. Thank you. _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
