Hello,

we also observed this going from an older release to 5.7.x this week. It seems to be harmless, but its generating indeed a lot of warnings.

Cheers,

Henning

> -----Original Message-----
> From: Jardar Leira via sr-users <sr-users@lists.kamailio.org>
> Sent: Donnerstag, 15. Februar 2024 22:30
> To: sr-users@lists.kamailio.org
> Cc: Jardar Leira <jardar.leira@sikt.no>
> Subject: [SR-Users] Dispatcher ping: "binding to source address X.X.X.X:XXXX
> failed: Address already in use" for TCP and TLS destinations
>
>
> We have recently upgraded from 5.6.4 to 5.7.4.
> No change in the KAMAILIO configuration.
>
> On all upgraded servers we are now getting this message in the logs for every
> destination when the dispatcher sends out OPTIONS to destinations listed in
> the dispatcher list:
>
> WARNING: <core> [core/tcp_main.c:1301]: find_listening_sock_info():
> binding to source address X.X.X.X:YYYY failed: Address already in use [98]
>
> The X.X.X.X being the servers IP address and YYYY being the servers listening
> port for tcp and/or tls.
>
> It's not consistent. For some servers it's every time OPTIONS is sent.
> For others it's just now and then. udp destinations have no issues.
>
> There are no other processes occupying these ports. Changing the listening
> port on the KAMAILIO also results in the new port reported as in use.
>
> Dispatcher OPTIONS still seems to work for both tcp and tls.
> Unsurprisingly using a dynamic, unprivileged port > 1023 and not the server
> port as the source port, as it shouldn't. The packages are sendt and a reply is
> registered. Inbound OPTIONS are processed as expected by KAMAILIO on the
> listening port.
>
>
> Have I missed something transitioning from 5.6 -> 5.7, or is this a bug?
>
>
>
> Relevant config:
> modparam("dispatcher", "ds_ping_method", "OPTIONS")
> modparam("dispatcher", "ds_probing_mode", 1) modparam("dispatcher",
> "ds_probing_threshold", 2) modparam("dispatcher", "ds_ping_interval", 120)
> modparam("dispatcher", "ds_ping_from", "sip:ping@xxxxxx.xxx")
> modparam("dispatcher", "ds_ping_latency_stats", 1)
>
>
> OS: Debian Bullseye
> Kamailio installed from
> https://deb.kamailio.org/kamailio57 bullseye
>
> Best regards,
> Jardar Leira
>
>
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