IP/Top: Add Android network interface

1 files changed, 126 insertions, 0 deletions

diff --git a/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/NetworkHelper.java b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/NetworkHelper.java
new file mode 100644
index 0000000000..08e9c9731f
--- /dev/null
+++ b/Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/NetworkHelper.java
@@ -0,0 +1,126 @@
+package org.dolphinemu.dolphinemu.utils;
+
+import android.app.Service;
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.LinkAddress;
+import android.net.LinkProperties;
+import android.net.Network;
+import android.net.RouteInfo;
+import android.os.Build;
+
+import androidx.annotation.Keep;
+import androidx.annotation.RequiresApi;
+
+import org.dolphinemu.dolphinemu.DolphinApplication;
+
+import java.net.Inet4Address;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.util.List;
+
+public class NetworkHelper
+{
+  private static ConnectivityManager GetConnectivityManager()
+  {
+    Context context = DolphinApplication.getAppContext();
+    ConnectivityManager manager =
+            (ConnectivityManager) context.getSystemService(Service.CONNECTIVITY_SERVICE);
+    if (manager == null)
+      Log.warning("Cannot get Network link as ConnectivityManager is null.");
+    return manager;
+  }
+
+  @RequiresApi(api = Build.VERSION_CODES.M)
+  private static LinkAddress GetIPv4Link()
+  {
+    ConnectivityManager manager = GetConnectivityManager();
+    if (manager == null)
+      return null;
+    Network active_network = manager.getActiveNetwork();
+    if (active_network == null)
+    {
+      Log.warning("Active network is null.");
+      return null;
+    }
+    LinkProperties properties = manager.getLinkProperties(active_network);
+    if (properties == null)
+    {
+      Log.warning("Link properties is null.");
+      return null;
+    }
+    for (LinkAddress link : properties.getLinkAddresses())
+    {
+      InetAddress address = link.getAddress();
+      if (address instanceof Inet4Address)
+        return link;
+    }
+    Log.warning("No IPv4 link found.");
+    return null;
+  }
+
+  private static int InetAddressToInt(InetAddress address)
+  {
+    byte[] net_addr = address.getAddress();
+    int result = 0;
+    // Convert address to little endian
+    for (int i = 0; i < net_addr.length; i++)
+    {
+      result |= (net_addr[i] & 0xFF) << (8 * i);
+    }
+    return result;
+  }
+
+  @Keep
+  public static int GetNetworkIpAddress()
+  {
+    if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.M)
+      return 0;
+    LinkAddress link = GetIPv4Link();
+    if (link == null)
+      return 0;
+    return InetAddressToInt(link.getAddress());
+  }
+
+  @Keep
+  public static int GetNetworkPrefixLength()
+  {
+    if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.M)
+      return 0;
+    LinkAddress link = GetIPv4Link();
+    if (link == null)
+      return 0;
+    return link.getPrefixLength();
+  }
+
+  @Keep
+  public static int GetNetworkGateway()
+  {
+    if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.M)
+      return 0;
+    ConnectivityManager manager = GetConnectivityManager();
+    if (manager == null)
+      return 0;
+    Network active_network = manager.getActiveNetwork();
+    if (active_network == null)
+      return 0;
+    LinkProperties properties = manager.getLinkProperties(active_network);
+    if (properties == null)
+      return 0;
+    try
+    {
+      InetAddress addr_out = InetAddress.getByName("8.8.8.8");
+      for (RouteInfo route : properties.getRoutes())
+      {
+        if (!route.matches(addr_out))
+          continue;
+        return InetAddressToInt(route.getGateway());
+      }
+    }
+    catch (UnknownHostException ignore)
+    {
+    }
+    Log.warning("No valid gateway found.");
+    return 0;
+  }
+}