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

[Victor Pascual Ávila]

On Wed, Oct 8, 2008 at 3:02 PM, Bogdan-Andrei Iancu
<bogdan at voice-system.ro> wrote:
> Hi Sebastian,
>
>
> Schumann Sebastian wrote:
>> Dear all
>>
>> I might have noticed a bug in SST module:
>>
>> If I send an INVITE with
>> Session-Expires: 300
>> Supported: timer
>>
>> I get rejected with 422 Session-Timer too small.
>>
>> If a Min-SE: x header with x > set min_se parameter included I do not
>> get the message.
>>
>> This is IMHO wrong behavior, as Min-SE is optional in initial
>> INVITE-requests sent by the phone acc. RFC 4028, table 1.
> 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.

IMO, the following is the correct behavior:

UAC -> Proxy
INVITE
Supported: timer
SE: 300
(Min-SE: 90, default)

Proxy -> UAS
INVITE
SE: 120
(Min-SE: 90, default)

-- 
Victor Pascual Ávila