In my opinion 487 should trigger whatever
actions/rollback that any other non-200 response sent by the UAS
would.
Regards,
Christer
From: gao.yang2@xxxxxxxxxx [mailto:gao.yang2@xxxxxxxxxx]
Sent: 12. maaliskuuta 2009 5:47
To: SIP; SIPPING
Cc: Christer Holmberg; Gonzalo Camarillo
Subject: One chart //"UPDATE during Re-INVITE" discussion
UAC UAS
| session established |
|<===================>|
| |
| F1 re-INVITE (SDP) |
|-------------------->|
| F2 1xx-rel (SDP) |
|<--------------------|
| F3 UPDATE |
|<--------------------| Target refreshing
| F4 2xx UPT |
|-------------------->|
| |
| F5/6 Cancel/200OK |
|-------------------->|
| F7 487 INV |
|<--------------------|
| F7 ACK |
|-------------------->|
| F8 re-INVITE (SDP) |
|-------------------->| Using which dialog state
F3/F4 is about target refreshing.
And if UAC sends Cancel， UAS sends 487. The first Re-INVITE is discarded.
But if UAC sends another Re-INVITE, which dialog state should it use?
I think is the one refreshed by F3. That's the merit of regarding UPDATE/200OK's atomicity.-------------------------------------------------------- ZTE Information Security Notice: The information contained in this mail is solely property of the sender's organization. This mail communication is confidential. Recipients named above are obligated to maintain secrecy and are not permitted to disclose the contents of this communication to others. This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the originator of the message. Any views expressed in this message are those of the individual sender. This message has been scanned for viruses and Spam by ZTE Anti-Spam system.
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