JSP獲得客服端MAC地址__JSP

package com.sun.servlet;import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.InetAddress;/** * 主機A向主機B發送“UDP－NetBIOS－NS”詢問包，即向主機B的137連接埠，發Query包來詢問主機B的NetBIOS Names資訊。 * 其次，主機B接收到“UDP－NetBIOS－NS”詢問包，假設主機B正確安裝了NetBIOS服務........... 而且137連接埠開放，則主機B會向主機A發送一個“UDP－NetBIOS－NS”應答包，即發Answer包給主機A。 * 並利用UDP(NetBIOS Name Service)來快速擷取遠程主機MAC地址的方法 *  * @author WINDY */public class UdpGetClientMacAddr {private String sRemoteAddr;private int iRemotePort=137;private byte[] buffer = new byte[1024];private DatagramSocket ds=null;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 {// 擷取電腦名稱int i = brevdata[56] * 18 + 56;String sAddr="";StringBuffer sb = new StringBuffer(17);// 先從第56位元組位置，讀出Number Of Names（NetBIOS名字的個數，其中每個NetBIOS Names Info部分佔18個位元組）// 然後可計算出“Unit ID”欄位的位置＝56＋Number Of Names×18，最後從該位置起連續讀取6個位元組，就是目的主機的MAC地址。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;}}

 

JSP:

<span style="color:#000000;"><%String smac = "";String sip = request.getHeader("x-forwarded-for");if (sip == null || sip.length() == 0|| "unknown".equalsIgnoreCase(sip)) {sip = request.getHeader("Proxy-Client-IP");}if (sip == null || sip.length() == 0|| "unknown".equalsIgnoreCase(sip)) {sip = request.getHeader("WL-Proxy-Client-IP");}if (sip == null || sip.length() == 0|| "unknown".equalsIgnoreCase(sip)) {sip = request.getRemoteAddr();}UdpGetClientMacAddr umac = new UdpGetClientMacAddr(sip);smac = umac.GetRemoteMacAddr();session.setAttribute("smac", smac);%></span>