[fpc-pascal] How to check if a network is available?

[Jean SUZINEAU]

Ping uses ICMP protocol.
I don't have currently Indy installed on my machines, but I think you 
can find pascal components for ICMP client and even ICMP server.
I think that this way you can do a single "ping", a single ICMP request.
It seems that Synapse has ping  support too:
https://wiki.freepascal.org/Networking_libraries