[sr-dev] Re: [kamailio/kamailio] auto_bind_ipv6 prevents listening also on ipv4 if system has no ipv6 (Issue #4098)

Seems a container-related stuff. Even on podman. Running the same on a standard machine w/o ipv6 enabled work as expected, even with the `auto_bind_ipv6` flag on.

What happens is that the netlink message `RTM_GETADDR` with AF_INET6 type get sent correctly, but kamailio is stuck on waiting (in socket_info.c). A quick test shows that enabling the non blocking flag on the netlink socket, the `recv` on the above message will fail with `EWOULDBLOCK` (but not on AF_INET type)

Now, I'm not an expert on such matter and right now don't know what is the best approach :thinking: