[SR-Users] Catching websocket / TCP errors

[Arsen Semenov]

Hi,

Yes, you can handle return codes from t_relay(). It should return -1 in
case of network failure.

On Wed, 20 Oct 2021 at 4:39 PM, Marrold <kamailio at marrold.co.uk> wrote:

> Hi all,
>
> Is there any way of catching these errors before sending a 500 No error
> (2/SL) ?
>
> Thanks
>
> On Tue, Oct 5, 2021 at 5:01 PM Marrold <kamailio at marrold.co.uk> wrote:
>
>> Hi Arsen
>>
>> That looks perfect, except we're still using 4.3.X on some of our proxies
>> ( I should have mentioned, sorry) . We plan on upgrading very soon...
>>
>> Thanks
>>
>>
>> On Tue, Oct 5, 2021 at 4:58 PM Arsen Semenov <arsperger at gmail.com> wrote:
>>
>>> Hi,
>>> have you tried this param?
>>>
>>> https://kamailio.org/docs/modules/devel/modules/usrloc.html#usrloc.p.db_clean_tcp
>>>
>>> On Tue, Oct 5, 2021 at 8:49 PM Marrold <kamailio at marrold.co.uk> wrote:
>>>
>>>> Hi,
>>>>
>>>> We're currently implementing WebRTC (SIP over a websocket) on our
>>>> Kamailio proxies and we're experiencing a minor issue after a restart.
>>>>
>>>> We write all USRLOC entries to a shared database to implement HA. These
>>>> are then loaded on a restart, which leaves us with entries with TCP
>>>> connections that no longer exist. When a call attempt is made the proxy
>>>> can't find the connection ID and immediately rejects the call with a "500
>>>> No error (2/SL)" -
>>>>
>>>> Oct  5 15:38:24 proxy-01 /sbin/kamailio[32087]: WARNING: <core>
>>>> [core/msg_translator.c:2861]: via_builder(): TCP/TLS connection (id: 0) for
>>>> WebSocket could not be found
>>>> Oct  5 15:38:24 proxy-01 /sbin/kamailio[32087]: ERROR: <core>
>>>> [core/msg_translator.c:2038]: build_req_buf_from_sip_req(): could not
>>>> create Via header
>>>> Oct  5 15:38:24 proxy-01 /sbin/kamailio[32087]: ERROR: tm
>>>> [t_fwd.c:479]: prepare_new_uac(): could not build request
>>>> Oct  5 15:38:24 proxy-01 /sbin/kamailio[32087]: ERROR: tm
>>>> [t_fwd.c:1759]: t_forward_nonack(): failure to add branches
>>>> Oct  5 15:38:24 proxy-01 /sbin/kamailio[32087]: ERROR: sl
>>>> [sl_funcs.c:414]: sl_reply_error(): stateless error reply used: No error
>>>> (2/SL)
>>>>
>>>> How can we catch this error to avoid terminating the call prematurely?
>>>> Or should we flush these TCP connections on start up?
>>>>
>>>> Thanks
>>>> Matthew
>>>>
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>>>
>>>
>>> --
>>> Arsen Semenov
>>>
>>> __________________________________________________________
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>> __________________________________________________________
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