Same remark applies to public GRUU generation: instance-id in 'gr' parameter may not be sufficient to select the right contact URI for rewriting, when UAC uses outbound.
Regards, Jeroen ----- Original Message ----- From: Jeroen van Bemmel To: [email protected] Sent: Saturday, April 28, 2007 3:35 PM Subject: [Sip] GRUU-13 : algorithm in annex A.2 does not distinguish betweenmultiple outbound contacts Jonathan, A minor remark about the temporary GRUU algorithm in A.2: if the UAC is using outbound and registers 2 Contacts under the same AoR and instance-id, the algorithm in A.2 currently cannot distinguish between those contacts (since the temporary GRUU only contains an index which resolves to an AoR+instance combination). Therefore, if the Contacts URIs are different (for example: different user part) the proxy is not able to reproduce the correct URI when rewriting the request URI. Concretely: when a UAC registers e.g. Contact: <sip:[EMAIL PROTECTED]> ;+sip.instance="<urn:uuid:0C67446E-F1A1-11D9-94D3-000A95A0E128>" ;reg-id=1Contact: <sip:[EMAIL PROTECTED]> ;+sip.instance="<urn:uuid:0C67446E-F1A1-11D9-94D3-000A95A0E128>" ;reg-id=2the proxy returns two distinct temporary GRUUs. However, regardless of which temporary GRUU the UA chooses to use, the proxy cannot determine whether to rewrite to "callee-001" or "callee-002" This can easily be remedied, e.g. by including the reg-id in the mapping Regards, Jeroen ------------------------------------------------------------------------------ _______________________________________________ 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
_______________________________________________ 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
