网络唤醒



package com.j8.network;

import java.io.IOException; import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.InetAddress;

/**

  • <p>网络唤醒</p>

  • @author 听雪

  • @Email hhwzyan@163.com

  • @CreateTime 2018年10月4日 */ public class WakeonLAN {

    /**

    • 根据子网掩码和ip得到主机的广播地
    • @param ip
    • @param subnetMask
    • @return */ private static String getBroadcastAddress(String ip, String subnetMask){ String ipBinary = toBinary(ip); String subnetBinary = toBinary(subnetMask); String broadcastBinary = getBroadcastBinary(ipBinary, subnetBinary); String wholeBroadcastBinary=spiltBinary(broadcastBinary); return binaryToDecimal(wholeBroadcastBinary); }

    /**

    • 二进制的ip字符串转十进
    • @param wholeBroadcastBinary
    • @return */ private static String binaryToDecimal(String wholeBroadcastBinary){ String[] strings = wholeBroadcastBinary.split("\."); StringBuilder sb = new StringBuilder(40); for (int j = 0; j < strings.length ; j++) { String s = Integer.valueOf(strings[j], 2).toString(); sb.append(s).append("."); } return sb.toString().substring(0,sb.length()-1); }

    /**

    • 8位分割二进制字符
    • @param broadcastBinary
    • @return */ private static String spiltBinary(String broadcastBinary){ StringBuilder stringBuilder = new StringBuilder(40); char[] chars = broadcastBinary.toCharArray(); int count=0; for (int j = 0; j < chars.length; j++) { if (count==8){ stringBuilder.append("."); count=0; } stringBuilder.append(chars[j]); count++; } return stringBuilder.toString(); }

    /**

    • 得到广播地址的二进制
    • @param ipBinary
    • @param subnetBinary
    • @return */ private static String getBroadcastBinary(String ipBinary, String subnetBinary){ int i = subnetBinary.lastIndexOf('1'); String broadcastIPBinary = ipBinary.substring(0,i+1); for (int j = broadcastIPBinary.length(); j < 32 ; j++) { broadcastIPBinary=broadcastIPBinary+"1"; } return broadcastIPBinary; }

    /**

    • 转二进制
    • @param content */ private static String toBinary(String content){ String binaryString=""; String[] ipSplit = content.split("\."); for ( String split : ipSplit ) { String s = Integer.toBinaryString(Integer.valueOf(split)); int length = s.length(); for (int i = length; i <8 ; i++) { s="0"+s; } binaryString = binaryString +s; } return binaryString; }

    /**

    • 唤醒主机
    • @param ip 主机ip
    • @param mac 主机mac
    • @param subnetMask 主机子网掩码 */ public static void wakeUpDevice(String ip,String mac,String subnetMask){ ip=ip.trim(); mac=mac.trim(); subnetMask=subnetMask.trim(); String broadcastAddress = getBroadcastAddress(ip,subnetMask); mac = mac.replace("-", ""); wakeBy(broadcastAddress,mac,389); }

    /**

    • 网络唤醒
    • @param ip 主机ip
    • @param mac 主机mac
    • @param port 端口 */ private static void wakeBy(String ip, String mac, int port) { //构建magic魔术包 String MagicPacage = "FFFFFFFFFFFF"; for (int i = 0; i < 16; i++) { MagicPacage += mac; } byte[] MPBinary = hexStr2BinArr(MagicPacage); try { InetAddress address = InetAddress.getByName(ip); DatagramSocket socket = new DatagramSocket(port); DatagramPacket packet = new DatagramPacket(MPBinary, MPBinary.length, address, port); //发送udp数据包到广播地址 socket.send(packet); socket.close(); } catch (IOException e) { e.printStackTrace(); } }

    private static byte[] hexStr2BinArr(String hexString) { String hexStr = "0123456789ABCDEF"; int len = hexString.length() / 2; byte[] bytes = new byte[len]; byte high = 0; byte low = 0; for (int i = 0; i < len; i++) { high = (byte) ((hexStr.indexOf(hexString.charAt(2 * i))) << 4); low = (byte) hexStr.indexOf(hexString.charAt(2 * i + 1)); bytes[i] = (byte) (high | low); } return bytes; }

}

package com.j8.network;

import org.junit.Test;

public class TestWakeOnLAN {
	
	@Test
	public void testWakeUpDevice() {
		
		/**
		 * ip精确到同一网段就行,因为要和子网掩码一起计算网络广播地址
		 */
		WakeonLAN.wakeUpDevice(ip, MAC地址, 子网掩码);
		
	}

}
最后修改:2018/10/04 01:58
如果觉得我的文章对你有用,请随意赞赏

发表评论

颜文字