TestConnection

var testStatus = "Testing network connection capabilities."; var testMessage = "Test in progress"; var shouldEnableNatMessage : String = ""; var doneTesting = false; var probingPublicIP = false; var serverPort = 9999; var connectionTestResult = ConnectionTesterStatus.Undetermined; // Indicates if the useNat parameter be enabled when starting a server var useNat = false; function OnGUI() { GUILayout.Label("Current Status: " + testStatus); GUILayout.Label("Test result : " + testMessage); GUILayout.Label(shouldEnableNatMessage); if (!doneTesting)
        TestConnection();
} function TestConnection() { // Start/Poll the connection test, report the results in a label and   // react to the results accordingly  connectionTestResult = Network.TestConnection(); switch (connectionTestResult) { case ConnectionTesterStatus.Error: 
            testMessage = "Problem determining NAT capabilities";
            doneTesting = true; break; case ConnectionTesterStatus.Undetermined: 
            testMessage = "Undetermined NAT capabilities";
            doneTesting = false; break; case ConnectionTesterStatus.PublicIPIsConnectable:
            testMessage = "Directly connectable public IP address.";
            useNat = false;
            doneTesting = true; break; // This case is a bit special as we now need to check if we can   // circumvent the blocking by using NAT punchthrough  case ConnectionTesterStatus.PublicIPPortBlocked:
            testMessage = "Non-connectable public IP address (port " +
                serverPort +" blocked), running a server is impossible.";
            useNat = false; // If no NAT punchthrough test has been performed on this public   // IP, force a test  if (!probingPublicIP) {
                connectionTestResult = Network.TestConnectionNAT();
                probingPublicIP = true;
                testStatus = "Testing if blocked public IP can be circumvented";
                timer = Time.time + 10;
            } // NAT punchthrough test was performed but we still get blocked  else if (Time.time > timer) {
                probingPublicIP = false; // reset  useNat = true;
                doneTesting = true;
            } break; case ConnectionTesterStatus.PublicIPNoServerStarted:
            testMessage = "Public IP address but server not initialized, "+ "it must be started to check server accessibility. Restart "+ "connection test when ready."; break; case ConnectionTesterStatus.LimitedNATPunchthroughPortRestricted:
            testMessage = "Limited NAT punchthrough capabilities. Cannot "+ "connect to all types of NAT servers. Running a server "+ "is ill advised as not everyone can connect.";
            useNat = true;
            doneTesting = true; break; case ConnectionTesterStatus.LimitedNATPunchthroughSymmetric:
            testMessage = "Limited NAT punchthrough capabilities. Cannot "+ "connect to all types of NAT servers. Running a server "+ "is ill advised as not everyone can connect.";
            useNat = true;
            doneTesting = true; break; case ConnectionTesterStatus.NATpunchthroughAddressRestrictedCone: case ConnectionTesterStatus.NATpunchthroughFullCone:
            testMessage = "NAT punchthrough capable. Can connect to all "+ "servers and receive connections from all clients. Enabling "+ "NAT punchthrough functionality.";
            useNat = true;
            doneTesting = true; break; default: 
            testMessage = "Error in test routine, got " + connectionTestResult;
    } if (doneTesting) { if (useNat)
            shouldEnableNatMessage = "When starting a server the NAT "+ "punchthrough feature should be enabled (useNat parameter)"; else shouldEnableNatMessage = "NAT punchthrough not needed";
        testStatus = "Done testing";
    }
}