> I think a UAS is forbidden to include a Session-Expires header field in > the > UPDATE request and a UAC should reject it. > In that case, the value of session refresher in 200 OK of INVITE MUST be > uac.
I'm not sure why you think that it is forbidden. RFC 4024 table 1 shows that Session-Expires is optional for UPDATE. Section 13 also shows Session-Expires within an UPDATE. RFC 4024 section 7.2 indicates the following: "Similarly, a re-INVITE or UPDATE request sent within a dialog for purposes other than session refreshes will also have the effect of refreshing the session, and its processing will follow the procedures defined in this specification." _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
