io_work: pass event_arg object to event handler in case of socket event

io_work: pass event_arg object to event handler in case of socket event

In order to allow the code to work with multiple listening sockets
it is essential to allow the generic multi_io event handler
to distinguish between the various socket objects.

This can be achieved by passing an event_arg object that contains
a pointer to the link_socket.

This code path is used on clients as well as UDP servers.

Change-Id: I7ebf0d4fb2a23278e16003b2e35598178155d658
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Gianmarco De Gregori <gianmarco@mandelbit.com>
Message-Id: <20241023142030.731-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg29625.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>