[Serusers] rfc 3262 support

[Klaus Darilion]

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 at 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 at pernau.at] 
> Sent: Thursday, October 19, 2006 3:03 PM
> To: Greger V. Teigre
> Cc: Mann, Kamal; serusers at 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 at 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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