[OpenSIPS-Users] SST module: Min-SE optional in request

[Bogdan-Andrei Iancu]

Actually, I was saying the same -the minimum accepted value... but as 
time we are referring to the same thing is ok:)

Regards,
Bogdan

Schumann Sebastian wrote:
> Erm, I overread your statement too quickly, sorry. I may disagree actually:
>
>   
>>> AFAIK, the "422 Session-Timer too small" is a response related to 
>>> "Session-Expires" value - the other party considers the 
>>>       
>> value to high 
>>     
>>> and in the reject adds the Min-SE with the minimum accepted 
>>> Session-Expires.
>>>       
>> Exactly. But my initial INVITE Session-Expires: 300 gets 
>> rejected, although modparam("sst", "min_se", 120) is set. So 
>> 300 should be accepted if min_se is 120. But is does get 
>> rejected from this client. Another client, that also includes 
>> MIN-SE: 90 (minimal default by RFC, thus optional in initial 
>> INVITE) and has the same values in Session-Expires gets 
>> accepted. So I correlated the absence if Min-SE in the 
>> initial INVITE as reason for its failure.
>>     
>
> In fact, Min-SE is the _minimum_ accepted. So if I set it to 90, I do not accept 45. 300 however would be accepted. So it is a lower bound (other party would consider it too LOW), not upper as you interpreted here...
>
> See RFC:
>    The Min-SE header field indicates the minimum value for the session
>    interval, in units of delta-seconds.  When used in an INVITE or
>    UPDATE request, it indicates the smallest value of the session
>    interval that can be used for that session.
>
> Do you interpret this statement the same way?
>
>