Hi,
First, this kind of discussion should take place on the sip-implementors
list, not the sip list. I am moving it there.
Next, it is difficult from you message to understand what it is that you
are trying to do. The little information you give suggests some
confusion with how sip works, but I am not sure of that.
It would be helpful if you could explain the the context and the
objective first. Then it should be possible to suggest a solution.
Since you are trying to change an existing call/dialog, please first
describe the establishment of the call - the initial INVITE request,
response, and ACK, the addresses of the caller and callee, and any
proxies involved. Then describe what change you want to make.
Good Luck,
Paul Kyzivat
zheng ji-ren wrote:
> Hi,
> I am newer and researching about mobility policy using SIP. I want to
> use a re-INVITE message without any message body like SDP to inform
> "corresponding node" to modify "mobile host" IP address . Because bob's real
> address is in Request-URI ,I setup From and To the same.
> the message is like this:
> INVITE [EMAIL PROTECTED]
> Via: [EMAIL PROTECTED]
> From: [EMAIL PROTECTED]
> To: [EMAIL PROTECTED]
> Call-ID: [EMAIL PROTECTED]
> Cseq: 1 INVITE
> Expire: 6000
> Contact: [EMAIL PROTECTED]
>
> I think the main purpose of re-INVITE is to inform (this is bob) to change
> mobile host(this is peny) IP address. Accordingly, session just need to be
> re-established and message body like SDP doesn't need to be offered in this
> message. However, when no any session description put in re-INVITE message,
> I don't sure if the re-established process will work well. And, I don't sure
> if it will suffer other problem like reliability or something else. Hope
> someone can tell me the answer. I will greatly appreciate your kindness and
> thank you in advice.
>
>
> -Regards
> -Zheng JR
>
>
>
> _______________________________________________
> Sip mailing list https://www1.ietf.org/mailman/listinfo/sip
> This list is for NEW development of the core SIP Protocol
> Use [EMAIL PROTECTED] for questions on current sip
> Use [EMAIL PROTECTED] for new developments on the application of sip
>
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