Hi Kamal!
I reconsidered by previous answer and found that there is no Cseq Problem as CSeq may have gap.
But reading your snippet: I've never seen any client yet sending provisional responses without to-tag. Thus, even if the proxy could generate reliable responses it wouldn't be used often.
regards klaus
Kamal.Mann@t-systems.com wrote:
Hi Darilion Please check the following snippet from rfc-3262 "An element that can act as a proxy can also send reliable provisional responses. In this case, it acts as a UAS for purposes of that transaction. However, it MUST NOT attempt to do so for any request that contains a tag in the To field. That is, a proxy cannot generate reliable provisional responses to requests sent within the context of a dialog. Of course, unlike a UAS, when the proxy element receives a PRACK that does not match any outstanding reliable provisional response, the PRACK MUST be proxied."
Regards Kamal Mann
-----Original Message----- From: Klaus Darilion [mailto:klaus.mailinglists@pernau.at] Sent: Thursday, October 19, 2006 3:03 PM To: Greger V. Teigre Cc: Mann, Kamal; serusers@lists.iptel.org Subject: Re: [Serusers] rfc 3262 support
AFAIK PRACK is a client feature and is end to end. Thus, ser supports PRACK as any other generic SIP request.
Maybe you could fake PRACK requests or responses between a PRACK capable
client and the proxy, but this will cause end-to-end CSeq mismatch and would require a dialog stateful proxy to adapt the CSeqs.
regards klaus
Greger V. Teigre wrote:
AFAIK, this RFC is not implemented yet. As for a list, there is none right now, but it's on the to-do list :-) g-)
Kamal.Mann@t-systems.com wrote:
Hi All
Do SER supports 'rfc 3262 Reliability of Provisional Responses in SIP'? Is there any list of standards supported by SER available??
Regards
Kamal Mann
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