JSP获得客服端MAC地址
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在网上看到的,感觉挺实用的就转过来。
package com.sun.servlet; import java.io.IOException; import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.InetAddress; /** * 主机A向主机B发送“UDP-NetBIOS-NS”询问包,即向主机B的137端口,发Query包来询问主机B的NetBIOS Names信息。 * 其次,主机B接收到“UDP-NetBIOS-NS”询问包,假设主机B正确安装了NetBIOS服务........... 而且137端口开放,则主机B会向主机A发送一个“UDP-NetBIOS-NS”应答包,即发Answer包给主机A。 * 并利用UDP(NetBIOS Name Service)来快速获取远程主机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 { // 获取计算机名 int i = brevdata[56] * 18 + 56; String sAddr=""; StringBuffer sb = new StringBuffer(17); // 先从第56字节位置,读出Number Of Names(NetBIOS名字的个数,其中每个NetBIOS Names Info部分占18个字节) // 然后可计算出“Unit ID”字段的位置=56+Number Of Names×18,最后从该位置起连续读取6个字节,就是目的主机的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文件:
<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>