Re: Review of draft-kuthan-sip-derive-00
Jiri Kuthan <[email protected]>
| Newsgroups | gmane.ietf.sip |
|---|---|
| Message-ID | <[email protected]> |
Elwell, John wrote: > > >> -----Original Message----- >> From: [email protected] [mailto:[email protected]] On >> Behalf Of Jiri Kuthan >> Sent: 20 November 2008 17:58 >> To: Raphael Coeffic >> Cc: [email protected]; [email protected] >> Subject: Re: [Sip] Review of draft-kuthan-sip-derive-00 >> >> Raphael Coeffic wrote: >> >>> I believe that the counter measure that you are proposing >> has already >>> been adressed in the draft. Concerning call forwarding, we >> know that >>> this is an issue. >> There are two such. The caller may have call forwarding setup >> --> DERIVE >> test will fail. > [JRE] Why will it fail? Call forwarding applies to the handling of > INVITE requests. SUBSCRIBE requests are not necessarily handled the > same, although I imagine that many implementations may do so, and > therefore your deduction is probably correct in many cases, but not > necessarily all cases. The point is not that it possibly may succeed. The point is that it possibly may fail because symmetric forwarding is simply not guranteed. Therefore we know positive DERIVE tests provide us with value, negative don't. -jiri _______________________________________________ Sip mailing list https://www.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