There are about three methods to obtain the MAC address of the client (IE) Nic from Java/JSP.
1. Execute ipconfig on the client using commands.
2. ActiveX Method
3. How to send query commands to port 137
Introduction:
The first method is to block the command that does not know why the MAC address is obtained when it is actually used. And the speed is the slowest of the three methods.
The Code is as follows:
String sip = "";
String SMAC = "";
SIP = request. getheader ("X-forwarded-");
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 ();
}
If (! "127.0.0.1". Equals (SIP) // filter out the Local Machine
{
Process = runtime.getruntime(cmd.exe C ("nbtstat-a" + SIP );
Inputstreamreader IR = new inputstreamreader (process. getinputstream ());
Linenumberreader input = new linenumberreader (IR );
String line;
While (line = input. Readline ())! = NULL)
If (line. indexof ("MAC address")> 0)
{
SMAC = line. substring (line. indexof ("-")-2 );
}
The second method is obtained using ActiveX, which is faster than the first method, but must reduce the security settings. Otherwise, the script will not be executed.
The iesettings are as follows:
1. Open IE browser
2. Tools> Internet Options> Security
3. Custom Level (c )...
4. initialize and execute the script for the ActiveX control that is not marked as a secure script.
Select "Start (Insecure)"-> click "yes" each time. We recommend that you do not access the Internet or you have security issues.
Select the prompt> click "yes" each time.
5. Click "OK"-> "OK ".
6. Restart IE to apply the settings.
Code
<Script language = JScript event = "oncompleted (hresult, perrorobject, pasynccontext)" for = Foo>
Document. Forms [0]. usermacaddr. value = Unescape (macaddr );
</SCRIPT>
<Script language = JScript event = onobjectready (objobject, objasynccontext) for = Foo>
If (objobject. ipenabled! = NULL & objobject. ipenabled! = "Undefined" & objobject. ipenabled = true)
{
If (objobject. macaddress! = NULL & objobject. macaddress! = "Undefined ")
Macaddr = objobject. macaddress;
}
</SCRIPT>
<Meta content = "mshtml 6.00.2800.1106" name = generator>
...
<Body>
<Object ID = locator classid = CLSID: 76a64158-cb41-11d1-8b02-00600806d9b6 viewastext> </Object>
<Object ID = Foo classid = CLSID: 75718c9a-f029-11d1-a1ac-00c04fb6c223> </Object>
<Script language = JScript>
VaR service = locator. connectserver ();
VaR macaddr;
Service. Security _. impersonationlevel = 3;
Service. instancesofasync (Foo, 'win32 _ networkadapterconfiguration ');
</SCRIPT>
... <TD Height = "20" align = "center"> MARK: </TD>
<TD> <input value = "no" name = "usermacaddr" size = "20" style = "width: 150px" readonly = "yes"> </TD>
The third method is to use the UDP protocol to send the query Mac command and parse the Mac in the return value. I personally think this is the best way (temporarily) the fastest speed
<%
String SMAC = "";
String sip = request. getheader ("X-forwarded-");
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 ();
%>
...
<Input value = <% = SMAC %> name = "usermacaddr" size = "20" style = "width: 150px" readonly = "yes">
Udpgetclientmacaddr. Java
Package CCH;
Import java. Io .*;
Import java.net .*;
Public class udpgetclientmacaddr {
Private string sremoteaddr;
Private int iremoteport = 137;
Private byte [] buffer = new byte [1, 1024];
Private datagramsocket DS = NULL;
Public udpgetclientmacaddr (string straddr) throws exception {
Sremoteaddr = straddr;
DS = new datagramsocket ();
}
Protected final encrypt rampacket send (final byte [] bytes) throws ioexception {
Required rampacket 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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