If the socket is not connected, writing to it will return an error which you can then check. Usually, writing to a socket has a timeout which you cannot avoid due to the nature of TCP.

Personally, I would look at AnyEvent or one of the other frameworks to handle non-blocking sockets.

Maybe you can tell us what solutions you have looked at and where you have problems with them? If you want to roll your own solution, perlipc provides a good starting point IMO.

In reply to Re^5: Check connection state prior to send data by Corion
in thread Check connection state prior to send data by Lucas Rey

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