[sr-dev] tm error: status rewrite by UAS

[Andrei Pelinescu-Onciul]

On Jun 22, 2009 at 16:12, Juha Heinanen <jh at tutpro.com> wrote:
> Andrei Pelinescu-Onciul writes:
> 
>  > In your case the final reply is 408 (timeout) and the new received one
>  > is 403.
>  > What might have happened is either the gw sent the 403 after the
>  > fr_inv_timer did hit for the branch corresponding to your fifth call or
>  > the gw sent the 403 for one of the previous branches, but it's hard to say
>  > without more info.
> 
> andrei,
> 
> i set fr_timer_avp to 3000 (3 sec) before calling t_relay.  i have
                       ^^^^^^ the avp timers  are in seconds, so you should
set them it to 3. All the other timeouts are in ms (I'll add a note to
the docs).

> 
> modparam("tm", "fr_inv_timer", 75000)
> 
> i have defined fr_inv_timer_avp, but it has not been given a value
> during processing of this request.  could the explanation be this:
> 
> k:
> 
> 1.3.11. fr_timer_avp (string)
> 
>    If you set the AVP to an empty string, the whole mechanism for
>    variable timeout will be disabled, falling back to the static
>    value.
> 
> sr:
> 
> 1.3.29. fr_inv_timer_avp (string)
> 
>    The value of fr_inv_timer timer can be overriden on per-transaction
>    basis. The administrator can provide a value to be used for a
>    particular transaction in an AVP. This parameter contains the name of
>    the AVP that will be checked. If the AVP exists then its value will be
>    used for the fr_inv_timer timer, effectively overriding the value
>    configured in fr_inv_timer parameter for the current transaction.

Yes, this is it.
> 
> what does sr do if fr_inv_timer_avp exists, but is not set before
> t_relay is called?

An avp always has a value if it exists. If its value is the empty string
or 0 => the avp integer value will be 0 => in this case the timer will
be set to 0.

I'll add a check for 0 in sr too (so that it will be compatible with the
k way).

Note that in ser the modern way to use avps for timers is via t_set_fr()
& friends (you can set everything from fr timers to retransmission and
lifetime, you can later reset to default via t_reset_fr() and you can
use it only when needed).

Andrei