mirror of
https://github.com/moonlight-stream/moonlight-android.git
synced 2026-04-14 20:06:07 +00:00
Remove moonlight-common subproject
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@@ -0,0 +1,99 @@
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package com.limelight.nvstream.wol;
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import java.io.IOException;
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import java.net.DatagramPacket;
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import java.net.DatagramSocket;
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import java.net.InetAddress;
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import java.util.Scanner;
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import com.limelight.LimeLog;
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import com.limelight.nvstream.http.ComputerDetails;
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public class WakeOnLanSender {
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private static final int[] PORTS_TO_TRY = new int[] {
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7, 9, // Standard WOL ports
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47998, 47999, 48000, 48002, 48010 // Ports opened by GFE
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};
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public static void sendWolPacket(ComputerDetails computer) throws IOException {
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DatagramSocket sock = new DatagramSocket(0);
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byte[] payload = createWolPayload(computer);
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IOException lastException = null;
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boolean sentWolPacket = false;
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try {
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// Try all resolved remote and local addresses and IPv4 broadcast address.
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// The broadcast address is required to avoid stale ARP cache entries
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// making the sleeping machine unreachable.
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for (String unresolvedAddress : new String[] {
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computer.localAddress, computer.remoteAddress, computer.manualAddress, computer.ipv6Address, "255.255.255.255"
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}) {
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if (unresolvedAddress == null) {
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continue;
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}
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try {
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for (InetAddress resolvedAddress : InetAddress.getAllByName(unresolvedAddress)) {
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// Try all the ports for each resolved address
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for (int port : PORTS_TO_TRY) {
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DatagramPacket dp = new DatagramPacket(payload, payload.length);
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dp.setAddress(resolvedAddress);
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dp.setPort(port);
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sock.send(dp);
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sentWolPacket = true;
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}
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}
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} catch (IOException e) {
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// We may have addresses that don't resolve on this subnet,
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// but don't throw and exit the whole function if that happens.
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// We'll throw it at the end if we didn't send a single packet.
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e.printStackTrace();
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lastException = e;
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}
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}
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} finally {
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sock.close();
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}
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// Propagate the DNS resolution exception if we didn't
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// manage to get a single packet out to the host.
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if (!sentWolPacket && lastException != null) {
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throw lastException;
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}
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}
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private static byte[] macStringToBytes(String macAddress) {
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byte[] macBytes = new byte[6];
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@SuppressWarnings("resource")
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Scanner scan = new Scanner(macAddress).useDelimiter(":");
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for (int i = 0; i < macBytes.length && scan.hasNext(); i++) {
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try {
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macBytes[i] = (byte) Integer.parseInt(scan.next(), 16);
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} catch (NumberFormatException e) {
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LimeLog.warning("Malformed MAC address: "+macAddress+" (index: "+i+")");
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break;
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}
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}
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scan.close();
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return macBytes;
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}
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private static byte[] createWolPayload(ComputerDetails computer) {
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byte[] payload = new byte[102];
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byte[] macAddress = macStringToBytes(computer.macAddress);
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int i;
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// 6 bytes of FF
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for (i = 0; i < 6; i++) {
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payload[i] = (byte)0xFF;
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}
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// 16 repetitions of the MAC address
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for (int j = 0; j < 16; j++) {
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System.arraycopy(macAddress, 0, payload, i, macAddress.length);
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i += macAddress.length;
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}
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return payload;
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}
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}
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