[OpenSIPS-Users] [presence] timer for waiting or pending states in winfo

[Anca Vamanu]

Hi Inaki,

The current implementation keeps the waiting subscription for 24h only 
and it is a hard coded value. Maybe it should be done configurable.

regards,
Anca


Iñaki Baz Castillo wrote:
> Hi, how does OpenSIPS implement the timers for "pending" and "waiting" status 
> in Subscription State Machine (RFC 3857 Section 4.7.1):
>
>    Of course, policy may never be specified for the subscription.  As a
>    result, the server can generate a giveup event to move the waiting
>    subscription to the terminated state.  The amount of time to wait
>    before issuing a giveup event is system dependent.
>
>    The giveup event is generated in either the waiting or pending states
>    to destroy resources associated with unauthorized subscriptions.
>    This event is generated when a giveup timer fires. This timer is set
>    to a timeout value when entering either the pending or waiting
>    states.  Servers need to exercise care in selecting this value.  It
>    needs to be large in order to provide a useful user experience; a
>    user should be able to log in days later and see that someone tried
>    to subscribe to them.  However, allocating state to unauthorized
>    subscriptions can be used as a source of DoS attacks.  Therefore, it
>    is RECOMMENDED that servers that retain state for unauthorized
>    subscriptions add policies which prohibit a particular subscriber
>    from having more than some number of pending or waiting
>    subscriptions.
>
>
> This is, A subscribes to B whie B is not registered. B becomes registered 
> after 2 days and subscribes to its own watcher information. Would B receive 
> the notification about the subscribe attemp from A to B?
>
> Thanks.
>
>