Is my socket open?

[Chase Preuninger]

What is the most reliable way to tell if a socket is sill connected?

 

[Daniel Pitts]

Move some data through it.

Specifically, if your application-level protocol supports some sort of
ping/pong handshake, use it as appropriate. You can also have some sort
of time-out, where if you haven't had any activity in /n/ minutes,
assume the connection is dead.