Hi Jean-Hugues, There is also a draft http://tools.ietf.org/html/draft-kaplan-mmusic-best-effort-srtp-01, that was interpreting SAVP as SRTP only while AVP in combination with crypto is used as "best-effort SRTP".
Regards, Nenad -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jean-Hugues Royer Sent: Saturday, April 09, 2011 1:35 PM To: [email protected] Subject: [Sip-implementors] RTP/AVP with crypto attribute Hi, What is the recommended behavior when you receive a SDP offer with a RTP/AVP media protocol including a crypto attribute ? Ignore the media ? Ignore the crypto attribute ? Process it as a RTP/SAVP when SRTP is locally supported ? In that case answer with a RTP/AVP or change it to a RTP/SAVP ? Is there any document that actually restricts the use of a crypto attribute to a media with RTP/SAVP ? (RFC4568 doesn't) SNOM is one the several producers of such offers when they want to optionally offer SRTP. Their argument for not using two medias (RTP/AVP & RTP/SAVP) by default in the offer (as it should be) is that some proxies doesn't support multiples medias, are you aware of such proxies ? _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
