15 apr 2012 kl. 16:32 skrev Vineet Menon: > Ho Olle, > > So, is that the issue with not being able to authnticate response messages, > that how to convey the sender that one is unable to say whether he was able > to auth. the response??? > > I thought it would be regarding something else in the protocol..... > > Anyways, can't it be done that UAC sends an Option message to indicate this??
Well, the important part is to look at this directionwise. You have one part that sends the INVITE, the CALLER. THe callee now is able to verify the identity (and the message) of the caller. Sending an OPTIONs as a response to a response is a severe violation of the design of SIP. You might consider using some message in the other direction that is valid during the call setup, but even that would be messy, like a PRACK or an UPDATE. It would mean that the caller would propably have to keep the ACK, which would seriously mess the INVITE transaction. Any other ideas out there? /O _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
