Tags are part of the dialog match and not trasaction layer. Transaction layer checks for the branch-id and further push the request to TU layer and TU layer performs dialog match where 'To' tag is validated and take decision. So, its TU layer which decides based on 'To' tag.
regards, Manju **************************************************************************** *********** This e-mail and attachments contain confidential information from HUAWEI, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient's) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it! -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Tuesday, July 08, 2008 1:16 PM To: [email protected] Subject: [Sip-implementors] Re-invite without To Tag Hi All, The re-invite should be processed, by UAS, as the request within the dialog. In this point, the re-invite without the To tag should be discarded, right? While, here is a problem, should it done by the Transaction layer which is responsible for the dialog state to detect such a invlid re-invite, or by the transaction user, i.e, the application user of the SIP stack? In other word, should a re-usable SIP Stack software be capabable of detecting a re-invite without To-tag? Thanks, Alex Zhang GSM/UMTS Voice Core - MSC Design Guangdong Nortel (GDNT) R&D Center PSTN: +86 020 89188782 / ESN: 6 554 8782 E-Mail: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> / YahooIM: zcc_nuaa " Stay Hungry, Stay Foolish." - Steve Jobs _______________________________________________ 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
