event/multi: add event_arg object to make event handling more generic

event/multi: add event_arg object to make event handling more generic

In order to prepare the event handling code to deal with multiple
listening sockets, we have to make sure that it is possible to
distinguish which of these sockets have been poked by an incoming
connection request.

To achieve that, this patch changes the object being passed as
event handler argument, from a "partly integer-evaluated variable"
to a full struct with a proper type attribute.

This struct will allow the code to carry around the particular
listening socket where the connection is being established.

This change affects the TCP server code path only as UDP servers
use only one socket to handle all clients.

Change-Id: Icd7f6a2ad350cdc2312b3e80fa0dbdd7e4311d2e
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Gianmarco De Gregori <gianmarco@mandelbit.com>
Acked-by: Frank Lichtenheld <frank@lichtenheld.com>
Message-Id: <20241023080853.3710-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg29602.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>