Hi Harbhanu, For your scenario, you should just send ACK to the retransmitted 2xx. If u keep on rcving the retx 2xx, send ack till the ACK timer expires. As far as clubbing session timer with retx 2xx is wrong. Session refresh request should be sent as per agreed time. Also u cannot reset/rehandle session timer for each retx 2xx recvd. How to be sure whehter the other party is doing the same or not.
cheers!! sarvpriya On Thu, Jul 1, 2010 at 11:14 AM, Harbhanu <[email protected]> wrote: > Please elaborate your point, since I got a bit confused from your answer. > > Do you mean 'INVITE transaction' here, since ACK anyways doesn't form its > part (incase of a 2xx response)? > Also, 2xx terminates the server transaction and subsequent retransmissions > are then handled by TU (or UAS to be precise). > > Thus, Is it wrong to infer that the 'peer-is-alive' when we get a 2xx > retransmission of INVITE? > > > **************************************************************************** > *********** > 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: Iñaki Baz Castillo [mailto:[email protected]] > Sent: Thursday, July 01, 2010 12:27 AM > To: Vikram Chhibber > Cc: Harbhanu; [email protected] > Subject: Re: [Sip-implementors] Retrans 2xx handilng - RFC-4028 > > 2010/6/30 Vikram Chhibber <[email protected]>: > > 2. Handling retransmissions of 2xx(INVITE) - > > Should we restart session timer here or not? > > No. > > When a transaction server (in a proxy or in an UAS) receives a request > retransmission it must re-send the last response. > When a transaction client (in a proxy or in an UAC) receives a > retransmission of a final response for an INVITE it must re-send the > ACK. > > That's all, no more actions must be triggered. > > > -- > Iñaki Baz Castillo > <[email protected]> > > > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > -- cheers!!!! sarvpriya _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
