Fabrice Bellet authored Oct 01, 2021 and Olivier Crête committed Nov 22, 2021

With this patch we ensure that local socket errors during connection
establishment are properly transmitted to the connection check layer, so
the related pair can be put in state failed when needed. The local
socket errors we are interested in, are those occuring when the local
source address cannot be bound anymore, because the underlying interface
vanished for example.

In particular, we don't ignore errors coming from g_socket_bind() with
tcp active sockets, that perform a bind to *whatever* local address is
available, in case it cannot bind to the specified address.

This behaviour was demonstrated with the test-tcp example, that tried
to bind to the IPv4 loopback address on a socket initially created for
the IPv6 loopback.