Catching websocket / TCP errors - sr-users

Arsen Semenov

5 Oct 5 Oct

6:54 p.m.

Hi, have you tried this param? https://kamailio.org/docs/modules/devel/modules/usrloc.html#usrloc.p.db_cle… On Tue, Oct 5, 2021 at 8:49 PM Marrold <kamailio(a)marrold.co.uk> wrote:

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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 __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions * sr-users(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: * https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

-- Arsen Semenov

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Marrold

20 Oct 20 Oct

2:36 p.m.

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(a)marrold.co.uk> wrote:

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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(a)gmail.com> wrote:

Hi, have you tried this param? https://kamailio.org/docs/modules/devel/modules/usrloc.html#usrloc.p.db_cle… On Tue, Oct 5, 2021 at 8:49 PM Marrold <kamailio(a)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 __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions * sr-users(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: * https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

-- Arsen Semenov __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions * sr-users(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: * https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

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Marrold

3:30 p.m.

That makes sense, thanks Arsen. We're already catching it then we just sl_reply_error() - I'll add some special handling for this scenario Thanks again On Wed, Oct 20, 2021 at 12:58 PM Arsen Semenov <arsperger(a)gmail.com> wrote:

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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(a)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(a)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(a)gmail.com> wrote:

Hi, have you tried this param? https://kamailio.org/docs/modules/devel/modules/usrloc.html#usrloc.p.db_cle… On Tue, Oct 5, 2021 at 8:49 PM Marrold <kamailio(a)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 > > __________________________________________________________ > Kamailio - Users Mailing List - Non Commercial Discussions > * sr-users(a)lists.kamailio.org > Important: keep the mailing list in the recipients, do not reply only > to the sender! > Edit mailing list options or unsubscribe: > * https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users > -- Arsen Semenov __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions * sr-users(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: * https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

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