Comments inline On 9/12/07, Vikram Chhibber <[EMAIL PROTECTED]> wrote: > Hi, > > i have few queries on SIP offer/answer for which I couldn't find a > straightforward answers: > > 1. We all are aware that we should be prepared to receive initial > INVITE with no offer. In this case, the UAS is supposed to send its > offer in the 200 Ok response. > Is sending re-INVITE with no SDP valid case? I know sending UPDATE > with no SDP is valid. > Yes, it is a valid case.
> 2. Once a unicast session is established, can any of the party send a > new offer with entirely new "o" line?. The motivation for asking this > question is that suppose I have a B2BUA who doesn't do much on SDP > part and simply copies SDP from incoming messages to the outgoing > messages. Now if this B2BUA wants to send re-INVITE (for hold or > inactive media) to either party, does it needs to remember previous > SDP negiotiation and modifies that SDP to send re-INVITE or can it > create a SDP without considering anything form previous offer/answer. The session id in the o line cannot be changed within a session. > > Thanks, > ~Vikram > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > -- With Regards Retesh Chadha _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
