On Mon, Jun 28, 2010 at 3:06 AM, Harbhanu <[email protected]> wrote: > Please consider the below mentioned scenario. Here, should session timer be > restarted/'re-handled' when retransmitted 2xx is received? > > > > UAC UAS > > | | > > |INVITE | > > |--------------------->| > > | 2xx | > > |<---------------------| > > | | > > |UPDATE | > > |--------------------->| > > | 2xx-UPDATE| > > |<---------------------| > > | | > > | 2xx(re-trans)| > > |<---------------------| > > | | > > > > > > IMO even though not explicitly mentioned in RFC-4028, we should ignore > retransmissions of 2xx of refresh requests. Yes. But you should promptly ACK the received 2xx. > > Since, this might have issue in consistent/alike handling of 2xx for ALL > session refresh requests, since there is a fundamental difference between > INVITE and UPDATE at transaction layer itself. Otherwise too, here UPDATE > could change many other parameters such as SE value & refresher, which > needn't be reverted after receiving 2xx of INVITE. This seems to be a problem with the UAC behavior. It should not send UPDATE unless it has sent ACK and INVITE offer/answer has been completed. > > > > Please share your opinion. Thanks! > > > > Regards, > > Harbhanu > > > > **************************************************************************** > *********** > 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! > > > > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors >
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