One scenario where it may make sense is when SDP is included in the OPTIONS ... Here the UAC can discover the capabillity of the far end by setting the port to zero without any media exchange.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gary Cote Sent: Monday, October 09, 2006 9:31 PM To: chozhan A Cc: [email protected] Subject: Re: [Sip-implementors] regarding SDP See RFC 3264, Section 5.1 concerning the use of the address and port in the offer. You can set the port to be zero in the offer, but it really only seems to be allowed for purposes of syntactic completeness and the semantics are not clearly defined. You should not assume that the answerer will send an immediate BYE request if all m= lines in the offer have their ports set to zero. As to your final question: yes, it's feasible. No, it doesn't make sense to do it. Of course, that's just my opinion. - g On 10/7/06, chozhan A <[EMAIL PROTECTED]> wrote: > > Hi all, > > can the port number in "m=" line be zero in offer. > If yes can all "m=" lines have 0 as port number > If this is also allowed can i assume that the answerer will generate > BYE immidiately after sending answer. > > i want to know from the point of view that whether RFC > restrict(fesiable or not) and not as whether it makes sense or not. > > Thanks in advance. > regards, > AC > > > > --------------------------------- > Find out what India is talking about on - Yahoo! Answers India Send > FREE SMS to your friend's mobile from Yahoo! Messenger Version 8. Get > it NOW _______________________________________________ > 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 The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
