Example: Network addresses

public static int main (string[] args) {
//
// Determine whether valadoc.org can be reached: (sync):
//

NetworkMonitor monitor = NetworkMonitor.get_default ();
NetworkAddress address = new NetworkAddress ("www.valadoc.org", 80);
try {
bool can_reach = monitor.can_reach (address);
print ("can-reach: %s\n", can_reach.to_string ());
} catch (Error e) {
print ("Error: %s\n", e.message);
}

return 0;
}

 valac --pkg gio-2.0 GLib.NetworkAddress.vala

See: