JSP获得客服端MAC地址

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。 view source print ? 001 packagecom.sun.servlet; 002    003 importjava.io.IOException; 004 importjava.net.DatagramPacket; 005 importjava.net.DatagramSocket; 006 importjava.net.InetAddress; 007 /** 008  * 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。 009  * 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。 010  * 并利用UDP(NetBIOS Name Service)来快速获取远程主机MAC地址的方法 011  *  012  * @author WINDY 013  */ 014 publicclassUdpGetClientMacAddr { 015     privateString sRemoteAddr; 016     privateintiRemotePort=137; 017     privatebyte[] buffer =newbyte[1024]; 018     privateDatagramSocket ds=null; 019    020     publicUdpGetClientMacAddr(String strAddr)throwsException{ 021         sRemoteAddr = strAddr; 022         ds =newDatagramSocket(); 023     } 024    025     protectedfinalDatagramPacket send(finalbyte[] bytes)throwsIOException { 026         DatagramPacket dp =newDatagramPacket(bytes,bytes.length,InetAddress.getByName(sRemoteAddr),iRemotePort); 027         ds.send(dp); 028         returndp; 029     } 030    031     protectedfinalDatagramPacket receive()throwsException { 032         DatagramPacket dp =newDatagramPacket(buffer,buffer.length); 033         ds.receive(dp); 034         returndp; 035     } 036     protectedbyte[] GetQueryCmd()throwsException { 037         byte[] t_ns =newbyte[50]; 038         t_ns[0] =0x00; 039         t_ns[1] =0x00; 040         t_ns[2] =0x00; 041         t_ns[3] =0x10; 042         t_ns[4] =0x00; 043         t_ns[5] =0x01; 044         t_ns[6] =0x00; 045         t_ns[7] =0x00; 046         t_ns[8] =0x00; 047         t_ns[9] =0x00; 048         t_ns[10] =0x00; 049         t_ns[11] =0x00; 050         t_ns[12] =0x20; 051         t_ns[13] =0x43; 052         t_ns[14] =0x4B; 053    054         for(inti =15; i <45; i++){ 055             t_ns[i] =0x41; 056         } 057         t_ns[45] =0x00; 058         t_ns[46] =0x00; 059         t_ns[47] =0x21; 060         t_ns[48] =0x00; 061         t_ns[49] =0x01; 062         returnt_ns; 063     } 064     protectedfinalString GetMacAddr(byte[] brevdata)throwsException { 065         // 获取计算机名 066         inti = brevdata[56] *18+56; 067         String sAddr=""; 068         StringBuffer sb =newStringBuffer(17); 069         // 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） 070         // 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。 071         for(intj =1; j <7;j++) 072         { 073             sAddr = Integer.toHexString(0xFF& brevdata[i+j]); 074             if(sAddr.length() <2) 075             { 076                 sb.append(0); 077             } 078             sb.append(sAddr.toUpperCase()); 079             if(j <6) sb.append(':'); 080         } 081         returnsb.toString(); 082     } 083    084     publicfinalvoidclose() { 085         try 086         { 087             ds.close(); 088         } 089         catch(Exception ex){ 090             ex.printStackTrace(); 091         } 092     } 093    094     publicfinalString GetRemoteMacAddr()throwsException { 095         byte[] bqcmd = GetQueryCmd(); 096         send(bqcmd); 097         DatagramPacket dp = receive(); 098         String smac = GetMacAddr(dp.getData()); 099         close(); 100    101         returnsmac; 102     } 103 } JSP文件： view source print ? 01 <spanstyle="color:#000000;"><% 02                 String smac = ""; 03                 String sip = request.getHeader("x-forwarded-for"); 04                 if (sip == null || sip.length() == 0 05                         || "unknown".equalsIgnoreCase(sip)) { 06                     sip = request.getHeader("Proxy-Client-IP"); 07                 } 08                 if (sip == null || sip.length() == 0 09                         || "unknown".equalsIgnoreCase(sip)) { 10                     sip = request.getHeader("WL-Proxy-Client-IP"); 11                 } 12                 if (sip == null || sip.length() == 0 13                         || "unknown".equalsIgnoreCase(sip)) { 14                     sip = request.getRemoteAddr(); 15                 } 16                 UdpGetClientMacAddr umac = new UdpGetClientMacAddr(sip); 17                 smac = umac.GetRemoteMacAddr(); 18                 session.setAttribute("smac", smac); 19             %></span>