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Fix WoL issues by also sending magic packet to broadcast address

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Synced Synapse 2015-03-31 18:26:28 +01:00
parent 04db54dfca
commit 21c5e045e3
1 changed files with 28 additions and 0 deletions
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28
app/src/main/java/org/xbmc/kore/utils/NetUtils.java
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@ -21,7 +21,10 @@ import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.InterfaceAddress;
import java.net.NetworkInterface;
import java.net.UnknownHostException;
import java.util.Enumeration;
/**
* Various utilities related to networking
@ -137,7 +140,32 @@ public class NetUtils {
InetAddress address = InetAddress.getByName(hostAddress);
DatagramPacket packet = new DatagramPacket(bytes, bytes.length, address, port);
DatagramSocket socket = new DatagramSocket();
LogUtils.LOGD(TAG, "Sending WoL to " + address.getHostAddress() + ":" + port);
socket.send(packet);
// Piece of code apprehended from here: http://stackoverflow.com/a/29017289
// Check all the existing interfaces that can be broadcasted to
Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
while (interfaces.hasMoreElements()) {
NetworkInterface networkInterface = interfaces.nextElement();
if (networkInterface.isLoopback())
continue; // Don't want to broadcast to the loopback interface
for (InterfaceAddress interfaceAddress : networkInterface.getInterfaceAddresses()) {
InetAddress broadcast = interfaceAddress.getBroadcast();
// Android seems smart enough to set to null broadcast to
// the external mobile network. It makes sense since Android
// silently drop UDP broadcasts involving external mobile network.
// Automatically skip IPv6 as it has broadcast IP null
if (broadcast != null) {
LogUtils.LOGD(TAG, "Sending WoL broadcast to " + broadcast.getHostAddress() + ":" + port);
// Broadcasts WOL Magic Packet to every possible broadcast address
packet = new DatagramPacket(bytes, bytes.length, broadcast, port);
socket.send(packet);
}
}
}
socket.close();
} catch (IOException e) {
LogUtils.LOGD(TAG, "Exception while sending magic packet.", e);