T8454: fix VRF-bind port availability check in service_https

When service https is configured with a listen-address on a VRF
interface, adding or changing the vrf option causes the commit to
fail with "TCP port 443 is used by another service!" even though
no conflict exists.

Root cause: check_port_availability() performs a socket.bind() in
the default network namespace. When the listen-address belongs to
a VRF interface the address is unreachable from the default
namespace, so the bind fails with OSError which is misinterpreted
as "port in use". The secondary check via is_listen_port_bind_service()
also fails because psutil cannot see sockets bound inside a VRF.

Fix: add an optional vrf parameter to check_port_availability().
When set, the test socket is bound to the VRF master device via
SO_BINDTODEVICE before the bind() call, so that the address is
resolved in the correct L3 domain. This is done in-process (no
subprocess) and works for both IPv4 and IPv6.

service_https verify() now passes the configured VRF (if any) to
check_port_availability(). Non-VRF configurations are unaffected.

Add smoke test for HTTPS with listen-address inside a VRF.

Co-authored-by: Christian Breunig <christian@breunig.cc>

0 files changed, 0 insertions, 0 deletions