Hi,

I personally think that there should be at most one outstanding target
refresh transaction at any point, and that the UPDATE therefor should
not be allowed in your example.

No, I don't know whether it's said somewhere, but in that case it's
probably also one thing we should fix in the 3261-fix.

We HAVE had a discussion whether 18x should be allowed for a re-INVITE
in the first place, regarding an offer/answer issue (what happens if the
18x carries an answer, but then the re-INVITE fails).

Regards,

Christer


> -----Original Message-----
> From: [EMAIL PROTECTED] 
> [mailto:[EMAIL PROTECTED] On Behalf 
> Of [EMAIL PROTECTED]
> Sent: 12. huhtikuuta 2007 14:18
> To: Sonja Belic
> Cc: [EMAIL PROTECTED]; 
> [EMAIL PROTECTED]
> Subject: Re: [Sip-implementors] UPDATE and reINVITE
> 
> Hi Sonja,
> 
> I think that which ever request has higher C-Seq number, the 
> contact in that request should be taken as dialogs remote target.
> 
> With Regards
> Raghu
> 
> 
> 
> 
> Sonja Belic <[EMAIL PROTECTED]>
> Sent by: [EMAIL PROTECTED]
> 04/12/2007 03:56 PM
> 
> 
> To
> [EMAIL PROTECTED]
> cc
> 
> Subject
> [Sip-implementors] UPDATE and reINVITE
> 
> 
> 
> 
> 
> 
> 
> Hi,
> I have a question regarding UPDATE and reINVITE.
> 
> A                                      B
> 
> INVITE (C1)
> |-------------------------------------->| // C = Contact
> 180
> |<--------------------------------------|
> 200 OK (INVITE)
> |<--------------------------------------|
> ACK
> |-------------------------------------->|
> target
> reINVITE (C2)
> |-------------------------------------->|
> 1xx
> |<--------------------------------------|
> UPDATE (C3)
> |-------------------------------------->|
> 200 OK (UPDATE)
> |<--------------------------------------|
> 200 OK (reINVITE)
> |<--------------------------------------|
> ACK
> |-------------------------------------->|
> 
> 
> Q: Is it OK for UPDATE to be sent when reINVITE isn't actually
> responded with the final response? And what will be the dialog remote
> target C2 or C3? According to RFC3311, I presume that 200 OK to
> reINVITE should have the same Contact as UPDATE or its response.
> 
> 
> 
> Best Regards
> Sonja
> 
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