On 01/13/2011 08:57 AM, Olle E. Johansson wrote: > > 13 jan 2011 kl. 15.36 skrev Paul Kyzivat: > >> Also, the following from the description of 488: >> >> A message body containing a description of media capabilities MAY be >> present in the response, which is formatted according to the Accept >> header field in the INVITE (or application/sdp if not present), the >> same as a message body in a 200 (OK) response to an OPTIONS request. >> >> could be used to indicate support, say for ipv6 and not ipv4. Then the >> offerer could analyze that (if I received such an offer, what would I >> answer) and if it comes up with something workable it can then send a >> new invite with that as the offer. > > Thanks Paul - I actually noticed that yesterday while reading the RFC for the > Nth time... > I must add that I have never ever seen that happen in real SIP communication. > I think it's very clever though. > > I think that's a question to add to Robert's questionnaire at SIPits: > > - Does your UA add an SDP to a 488 error message? > > Asking for it is a good way to indicate that it's possible and a preferred > way of handling errors.
Indeed, that's a very useful thing to know about :-) Presumably the 488's SDP would indicate "if you had constructed your offer this way, I would have been able to accept it"? -- Kevin P. Fleming Digium, Inc. | Director of Software Technologies 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA skype: kpfleming | jabber: kflem...@digium.com Check us out at www.digium.com & www.asterisk.org _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
