> I have a query regarding the matching > rules defined in section 17.2.3, RFC > 3261, for handling backwards compatibility > with RFC 2543 compliant implementations. > The matching rules for any request includes > matches for To tag and From tag. The earlier > draft of RFC 2543 doesn't mandate the To or > From tag. How should I handle request without > To or From tag ?
Section 12.2.1.1 indicates that rfc3261 compliant devices should not change the uri portion of the To and From headers. This is so the matching rules from rfc2543 can still work. " Usage of the URI from the To and From fields in the original request within subsequent requests is done for backwards compatibility with RFC 2543, which used the URI for dialog identification. In this specification, only the tags are used for dialog identification. It is expected that mandatory reflection of the original To and From URI in mid-dialog requests will be deprecated in a subsequent revision of this specification." Thus the following are good rules to follow. 1) Don't change To and From uri's during a dialog. 2) Prefer using tags instead of uri's for dialog identity. 3) If a tag is not present, use the uri. _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
