This is ok. But I fail to understand why there is a behaviour difference for 200 OK and Non-200 OK. For 200 OK UAS ensures reliability for Non-2xx its proxies.
Regards, Rahul ****************************************************************************************** This email and its 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 here 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 email in error, please notify the sender by phone or email immediately and delete it! ***************************************************************************************** ----- Original Message ----- From: NatarajuAB - SIP <[email protected]> Date: Thursday, January 20, 2011 10:28 pm Subject: RE: [Sip-implementors] Query To: 'Iñaki Baz Castillo' <[email protected]>, 'Kondaveeti Seshagiri' <[email protected]> Cc: 'RahulSrivastava 71616' <[email protected]>, [email protected] > Comments inline.... > > > > Thanks, > > Nataraju A B > > > > > -----Original Message----- > > > From: [email protected] [mailto:sip- > > > [email protected]] On Behalf Of Iñaki Baz > > > Castillo > > > Sent: 20 January 2011 13:14 > > > To: Kondaveeti Seshagiri > > > Cc: RahulSrivastava 71616; [email protected] > > > Subject: Re: [Sip-implementors] Query > > > > > > 2011/1/20 Kondaveeti Seshagiri <[email protected]>: > > > > If proxy not retransmit non-2XX final responses to a TCP UAC, then > > > > What is difference between transport over UDP and TCP? > > > > > > non 2XX responses are hop by hop, so if a SIP UAS or proxy > replies a > > > non-2XX via TCP it doesn't need to send retransmissions as it > > > *already* knows that the response has been received by the UAC or > > > previous proxy (due to the usage of TCP). > > > > [ABN] if any proxy needs to interface between TCP (ingress) and > UDP (egress) and vice versa, then it shall implement the > stateful(TSF/CSF) proxy functionality.... Proxy being stateless, > cannot interface between TCP and UDP transports... > > </3261 ... sec 16.1> > > In some circumstances, a proxy MAY forward requests using stateful > > transports (such as TCP) without being transaction-stateful. For > > instance, a proxy MAY forward a request from one TCP connection to > > another transaction statelessly as long as it places enough > > information in the message to be able to forward the response down > > the same connection the request arrived on. Requests forwarded > > between different types of transports where the proxy's TU must > take > an active role in ensuring reliable delivery on one of the > transports > MUST be forwarded transaction statefully. > > </3261> > > > > > > > > -- > > > Iñaki Baz Castillo > > > <[email protected]> > > > > > > _______________________________________________ > > > 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
