Rockson Li (zhengyli) wrote:
> Paul,
>
> I wonder why you think the first subscribe fails with a 500 due to out
> of order CSeq number.
> Sine the second one would be sent with Cseq+1 as in first one.
> I don't see out of order CSeq number issue here.
Well, the scenario says that the 2nd subscribe (with CSeq n+1) arrives
first, then when the first subscribe (with CSeq n) arrives it will be
less than current and hence cause a 500 response.
Paul
> Thanks
>
> Regards,
> -Rockson
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of
> Paul Kyzivat (pkyzivat)
> Sent: Tuesday, November 25, 2008 1:11 AM
> To: Volkan Hatem
> Cc: sip-implementors@lists.cs.columbia.edu
> Subject: Re: [Sip-implementors] Multiple Subscriptions in a dialog.
>
>
>
> Volkan Hatem wrote:
>> How are you planning to handle race conditions where "Subscribe
> expires:0"
>> is delivered before the original subscribe?
>
> In that case, you get the one notify, and the earlier subscribe fails
> with a 500 due to out of order CSeq number. But you get the result you
> wanted.
>
>> -volkan
>>
>> 2008/11/24 Evgeniy Khramtsov <[EMAIL PROTECTED]>
>>
>>> Naarumanchi Kaushik wrote:
>>>
>>>> Hi All,
>>>>
>>>> In a Subscribe dialog, can we unsubscribe before receiving 200 OK
>>>> for the subscribe refresh request?
>>>> Regards,
>>>> N.V.S.Kaushik.
>>>>
>>> Why not? This is a case flow:
>>>
>>> F1 |--Subscribe Expires:3600-->|
>>> F2 |--Subscribe Expires:0----->|
>>> F1 |<------------OK------------|
>>> F1 |<----------NOTIFY----------|
>>> F2 |<------------OK------------|
>>> F2 |<---NOTIFY terminated------|
>>>
>>> I don't see any weird situation here.
>>>
>>> --
>>> Regards,
>>> Evgeniy Khramtsov, ProcessOne.
>>> xmpp:[EMAIL PROTECTED] <[EMAIL PROTECTED]>.
>>>
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