Unity Internet Connection Availability

Question

I port our game to Unity and need some help verifying Unity’s internet connection. Unity's official documentation says: “Don't use Application.internetReachability. So I'm confused about which code will work here. I haven't found the exact solution on the forum. I want to check if Wi-Fi or GPRS is turned on, which should work for iOS and Android. Thanks in advance.

Answer 1

Decision

Application.internetReachability is what you need. Combined with Ping , probably.

Here is an example:

using UnityEngine;

public class InternetChecker : MonoBehaviour
{
    private const bool allowCarrierDataNetwork = false;
    private const string pingAddress = "8.8.8.8"; // Google Public DNS server
    private const float waitingTime = 2.0f;

    private Ping ping;
    private float pingStartTime;

    public void Start()
    {
        bool internetPossiblyAvailable;
        switch (Application.internetReachability)
        {
            case NetworkReachability.ReachableViaLocalAreaNetwork:
                internetPossiblyAvailable = true;
                break;
            case NetworkReachability.ReachableViaCarrierDataNetwork:
                internetPossiblyAvailable = allowCarrierDataNetwork;
                break;
            default:
                internetPossiblyAvailable = false;
                break;
        }
        if (!internetPossiblyAvailable)
        {
            InternetIsNotAvailable();
            return;
        }
        ping = new Ping(pingAddress);
        pingStartTime = Time.time;
    }

    public void Update()
    {
        if (ping != null)
        {
            bool stopCheck = true;
            if (ping.isDone)
            {
                if (ping.time >= 0)
                    InternetAvailable();
                else
                    InternetIsNotAvailable();
            }
            else if (Time.time - pingStartTime < waitingTime)
                stopCheck = false;
            else
                InternetIsNotAvailable();
            if (stopCheck)
                ping = null;
        }
    }

    private void InternetIsNotAvailable()
    {
        Debug.Log("No Internet :(");
    }

    private void InternetAvailable()
    {
        Debug.Log("Internet is available! ;)");
    }
}

Notes

• Unity ping , .. IP-. , - , DNS, , .
• ping. , 100% . .

Answer 2

, , " ", , , . WiFi. , Application.internetReachability Ping - , WWW.

Internet Reachability Verifier. ( WWW ). : http://j.mp/IRVUN

Answer 3

, Network.TestConnection, , , , NAT .

, . ConnectionTesterStatus.Error, , .

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";
    }
}

Answer 4

, . IOS, Android. , , :

public static bool InternetStatus ()
{
    if (Application.internetReachability != NetworkReachability.NotReachable)
    {
        return true;
    }else{
        return false;
    }
}