Hello,
any comment on this topic? Would be great to get an opinion at least on the first question, then I could document it or open an issue for it.
Thanks,
Henning
From: Henning Westerholt
Sent: Wednesday, November 25, 2020 6:53 PM
To: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org>
Cc: Kamailio (SER) - Development Mailing List <sr-dev@lists.kamailio.org>
Subject: handling of locally generated 478 errors
Hello,
I want to ask for your opinion on the best approach regarding the handling of locally generated 478 errors.
To give an example, like the ones generated from TM during t_relay() on an unresolvable destination.
Nov 25 17:40:13 kamailio[19345]: ERROR: {28607414 INVITE bba500ac-a9df-1239-6693-00505682c04d} tm [ut.h:286]:
uri2dst2(): failed to resolve "invalid.skalatan.de" :unresolvable A or AAAA request (-7)
Nov 25 17:40:13 kamailio[19345]: ERROR: {28607414 INVITE bba500ac-a9df-1239-6693-00505682c04d} tm [t_fwd.c:1738]: t_forward_nonack(): failure to add branches
Nov 25 17:40:13 kamailio[19345]: CRITICAL: {28607414 INVITE bba500ac-a9df-1239-6693-00505682c04d} rtpengine [../../core/parser/../ip_addr.h:658]: ip_addr2sbuf(): unknown address family 0
These errors will not show up in onreply or failure_route. A long time ago this was discussed on the list [1], as some functionality were phased out out that support these scenarios.
Kamailio will try to generate a 478 with TM, this will obviously fail as well, and then generate a 478 with SL.
Question 1)
Is this intentional that the internally generated 478 is not showing up in the failure_route, like for for 408? This has been tested several times, but it is a complicated configuration.
Question 2)
Are there any other (better) ideas how to handle that besides using a “event_route[sl:local-response]” to catch this, e.g. to tear down otherwise stale rtpengine sessions etc..? As a side note,
event_route[tm:local-response] seems not to work as well because of the tm failure.
Thanks,
Henning
[1]
https://lists.kamailio.org/pipermail/sr-users/2011-June/069020.html
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Henning Westerholt –
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