Thanks everyone. I missed out section "8 Modifying the Session" of RFC 3264
On 9/12/07, Retesh <[EMAIL PROTECTED]> wrote: > 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
