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. /O > > Thanks, > Paul > > On 1/11/2011 6:58 AM, Olle E. Johansson wrote: >> >> 11 jan 2011 kl. 11.20 skrev Saúl Ibarra Corretgé: >> >>>> I thought of that - but what would we put there that everyone could >>>> support? >>>> >>> >>> For the codec related 488, a 305 "Incompatible media format" could be >>> used. For IPv4/IPv6 stuff, 300 "Incompatible network protocol" or 301 >>> "Incompatible network address formats" could help. >>> >>> If none of them suit the needs, maybe a new draft needs to be written >>> extending the warning codes with some new ones addressing these new >>> needs :-) >>> >>> My 2 cents, >> >> Those cents had very high value to me. I have been blind - that's exactly >> what we need. Perfect! >> >> Thanks, Saghul! >> >> /O >> _______________________________________________ >> Sip-implementors mailing list >> Sip-implementors@lists.cs.columbia.edu >> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors >> > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors --- * Olle E Johansson - o...@edvina.net * Cell phone +46 70 593 68 51, Office +46 8 96 40 20, Sweden _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
