Hi all!! I was wondering if it is somehow possible to indicate in the Offer the local port where the caller is going to start sending media from. For some security reasons it would be convenient to have this information in the callee's UA before start receiving media packets from an unknown port. Regarding the IP address: I guess the caller's media IP address can be considered almost always the same as the one present in the c= line of the SDP Offer , but for some third control applications (which I can not imagine now) it might be possible to use another media IP as the source (?).
If I understand correctly the RFC 3264, the Offer includes media parameters where the callee should send his/her media to, but no mechanism to indicate the port from which the caller is going to send media from. In a sendrecv stream, the caller's source port is deducted from the Offer (isn't it?) but in uni-directional streams, the local port only indicates where the callee should send the RTCP so the source's RTP stream is uncertain until the other UA starts receiving the RTP packets. I have also checked the RFC 3407 (Simple Capability Declaration) but to my understanding I think it is not appropriate for indicating the local IP/port because this parameters are different for each created session and not a UA's capability. Moreover it does not include these parameters.... I hope I was clear enough and you can clarify and help me, Thanks in advance, Samuel Unclassified. _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
