[OpenSIPS-Users] sst causes unnecessary 422s

[Bogdan-Andrei Iancu]

Hi Jeff,

Could you post the INVITE that gets the 422 ? Does it contain  a min-se 
header? If not, according to the RFC, the default min-se is 90 (from the 
request) and the server has min-se 1800 -> this is why you get the 422.

Regards,
Bogdan



Jeff Pyle wrote:
> Hello,
>
> I noticed today that if a packet comes into the proxy with a Session-Expires
> header, it get's 422'ed.  Period.  Unfortunately the proxy that is doing
> this has real users on it I cannot take down at the moment, so debugging is
> limited during the day.  It is Opensips 1.5 build revision 5641.
>
> Here's what I can tell you:
>
>     loadmodule "sst.so"
>     modparam("sst|dialog", "timeout_avp", "$avp(s:sst_timeout)")
>     modparam("sst", "sst_flag", 6)
>     modparam("sst", "enable_stats", 1)
>     modparam("sst", "min_se", 1800)
>     modparam("sst", "reject_to_small", 1)
>
> and...
>
>     if (is_method("INVITE")) {
>         if (sstCheckMin("1")) {
>                 xlog("L_INFO", "SST too short - M=$rm RURI=$ru F=$fu T=$tu
> IP=$si ID=$ci\n");
>                 exit;
>         }
>
>         // continue call processing...
>     }
>
> ... in route[0].
>
> This xlog trips on an invite that has:
>     Session-Expires: 2400
>
> and then sends back a 422 that has:
>     MIN-SE: 1800
>
> I looked at sst_handlers.c, and it seems to make sense to me, but
> unfortunately my C skills aren't even a B.
>
> Any assistance would be most appreciated.
>
>
> Thanks,
> Jeff
>
>
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