> More, I deliberate that authenticating the validaty of the > receiver in a response(that means the To header) is also > required, and so far I has not see any draft nor maillist > discussing it(maybe I missed), considering the current > mechanism is not enough for such issue, I thing there should > be some effort to be put to take this aspect into account. [JRE] There have been a number of proposals in the past for response identity, but the problems encountered have proved to be insurmountable. I would suggest you look in the SIP and SIPPING mail archives and minutes from late 2005 / early 2006. Note also that, because of request retargeting, the identity of the responder will not necessarily equate to the identity in the To header field. In the absence of any solution to the response identity problem, RFC 4916 fills the gap by allowing authenticated identity to occur in a request in the reverse direction.
John > > Regards, > Ma Ji > > ________________________________ > > 抢注雅虎免费邮箱3.5G容量，20M附件！ <http://cn.mail.yahoo.com> > _______________________________________________ Sip mailing list https://www1.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use [EMAIL PROTECTED] for questions on current sip Use [EMAIL PROTECTED] for new developments on the application of sip
