import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.InetAddress;public class UdpGetClientMacAddr { private String sRemoteAddr; private int iRemotePort = 137; private byte[] buffer = new byte[1024]; private DatagramSocket ds = null; public static void main(String[] args) { try { UdpGetClientMacAddr mac = new UdpGetClientMacAddr("10.0.150.207"); String ma = mac.GetRemoteMacAddr(); System.out.println(ma); } catch (Exception e) { e.printStackTrace(); } } public UdpGetClientMacAddr(String strAddr) throws Exception { sRemoteAddr = strAddr; ds = new DatagramSocket(); } protected final DatagramPacket send(final byte[] bytes) throws IOException { DatagramPacket dp = new DatagramPacket(bytes, bytes.length, InetAddress .getByName(sRemoteAddr), iRemotePort); ds.send(dp); return dp; } protected final DatagramPacket receive() throws Exception { DatagramPacket dp = new DatagramPacket(buffer, buffer.length); ds.receive(dp); return dp; } protected byte[] GetQueryCmd() throws Exception { byte[] t_ns = new byte[50]; t_ns[0] = 0x00; t_ns[1] = 0x00; t_ns[2] = 0x00; t_ns[3] = 0x10; t_ns[4] = 0x00; t_ns[5] = 0x01; t_ns[6] = 0x00; t_ns[7] = 0x00; t_ns[8] = 0x00; t_ns[9] = 0x00; t_ns[10] = 0x00; t_ns[11] = 0x00; t_ns[12] = 0x20; t_ns[13] = 0x43; t_ns[14] = 0x4B; for (int i = 15; i < 45; i++) { t_ns[i] = 0x41; } t_ns[45] = 0x00; t_ns[46] = 0x00; t_ns[47] = 0x21; t_ns[48] = 0x00; t_ns[49] = 0x01; return t_ns; } protected final String GetMacAddr(byte[] brevdata) throws Exception { int i = brevdata[56] * 18 + 56; String sAddr = ""; StringBuffer sb = new StringBuffer(17); for (int j = 1; j < 7; j++) { sAddr = Integer.toHexString(0xFF & brevdata[i + j]); if (sAddr.length() < 2) { sb.append(0); } sb.append(sAddr.toUpperCase()); if (j < 6) sb.append(':'); } return sb.toString(); } public final void close() { try { ds.close(); } catch (Exception ex) { ex.printStackTrace(); } } public final String GetRemoteMacAddr() throws Exception { byte[] bqcmd = GetQueryCmd(); send(bqcmd); DatagramPacket dp = receive(); String smac = GetMacAddr(dp.getData()); close(); return smac; }}
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相关资源：使用JAVA获取客户端MAC地址.doc
