Hello, Could you please explain what kind of call control you are using to setup this conference? Assuming you are using SIP, you will have a port and IP address on the input side on your MCU, and you will exchange this SDP information with other participants, wherein you will receive their SDPs, and hence the forwarding is going to be mostly mechanical. Why do you need SSRC information?
On 4/1/06, M. Rangnathan <[EMAIL PROTECTED]> wrote: > > Hello! > > I am building an RTP point to multipoint multiplexer. For this, when a > packet comes in, I need to send it in to all receivers excepting the one > which sent me the packet. It would be conveniant if I knew the ssrc of > all receivers in order to do this but how do I know this before the > packet is sent? > > Hence, I am looking for some information which allows me to extract the > SSRC of the receiver of an RTP session from the SDP answer. Is such > information present in the SDP answer and where? I sifted through the > SDP offer/answer RFC but I dont seem to find any information about this > issue. > > > Another way I can do this is to rely on IP address and port and make > assumptions such apriori knowledge of IP and port where the sending > socket will be bound ( this way I can look it up in the incoming RTP > packet and avoid routing the packet back to the sender ). However, I > dont find any information in the RTP RFC that obliges the sender to bind > to any speicific IP address and port (only the receiver needs to bind to > the IP and port in the SDP answer and not the sender). Please correct me > if I am wrong in this assumption. > > > Thanks. > > Ranga > > -- > M. Ranganathan > > Advanced Networking Technologies Division, > National Institute of Standards and Technology (NIST), > 100 Bureau Drive, Stop 8920, Gaithersburg, MD 20899. > tel:301 975 3664 , fax:301 590 0932 http://w3.antd.nist.gov/ > Advanced Networking Technologies For the People! > > > _______________________________________________ > 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
