package de.creepsmash.client.network;
/** try to determine MAC address of local network card; this is done
using a shell to run ifconfig (linux) or ipconfig (windows). The
output of the processes will be parsed.
<p>
To run the whole thing, just type java FindMac
<p>
Current restrictions:
<ul>
<li>Will probably not run in applets
<li>Tested Windows / Linux / Mac OSX only
<li>Tested J2SDK 1.4 only
<li>If a computer has more than one network adapters, only
one MAC address will be returned
<li>will not run if user does not have permissions to run
ifconfig/ipconfig (e.g. under linux this is typically
only permitted for root)
</ul>
*/
import java.net.InetAddress;
import java.io.InputStream;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.text.ParseException;
import java.util.StringTokenizer;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
public final class FindMac {
public final static String getMacAddress() {
String mac = "";
String os = System.getProperty("os.name");
try {
if(os.startsWith("Windows")) {
mac = windowsParseMacAddress(windowsRunIpConfigCommand());
} else if(os.startsWith("Linux")) {
mac = linuxParseMacAddress(linuxRunIfConfigCommand());
} else if(os.startsWith("Mac OS X")) {
mac = osxParseMacAddress(osxRunIfConfigCommand());
}
} catch(Exception ex) {
ex.printStackTrace();
}
return mac;
}
/*
* Linux stuff
*/
private final static String linuxParseMacAddress(String ipConfigResponse) throws ParseException {
String localHost = null;
try {
localHost = InetAddress.getLocalHost().getHostAddress();
} catch(java.net.UnknownHostException ex) {
ex.printStackTrace();
throw new ParseException(ex.getMessage(), 0);
}
StringTokenizer tokenizer = new StringTokenizer(ipConfigResponse, "\n");
String lastMacAddress = null;
while(tokenizer.hasMoreTokens()) {
String line = tokenizer.nextToken().trim();
boolean containsLocalHost = line.indexOf(localHost) >= 0;
// see if line contains IP address
if(containsLocalHost && lastMacAddress != null) {
return lastMacAddress;
}
// see if line contains MAC address
int macAddressPosition = line.indexOf("HWaddr");
if(macAddressPosition <= 0) continue;
String macAddressCandidate = line.substring(macAddressPosition + 6).trim();
if(linuxIsMacAddress(macAddressCandidate)) {
lastMacAddress = macAddressCandidate;
continue;
}
}
ParseException ex = new ParseException
("cannot read MAC address for " + localHost + " from [" + ipConfigResponse + "]", 0);
ex.printStackTrace();
throw ex;
}
private final static boolean linuxIsMacAddress(String macAddressCandidate) {
Pattern macPattern = Pattern.compile("[0-9a-fA-F]{2}[-:][0-9a-fA-F]{2}[-:][0-9a-fA-F]{2}[-:][0-9a-fA-F]{2}[-:][0 -9a-fA-F]{2}[-:][0-9a-fA-F]{2}");
Matcher m = macPattern.matcher(macAddressCandidate);
return m.matches();
}
private final static String linuxRunIfConfigCommand() throws IOException {
Process p = Runtime.getRuntime().exec("ifconfig");
InputStream stdoutStream = new BufferedInputStream(p.getInputStream());
StringBuffer buffer= new StringBuffer();
for (;;) {
int c = stdoutStream.read();
if (c == -1) break;
buffer.append((char)c);
}
String outputText = buffer.toString();
stdoutStream.close();
return outputText;
}
/*
* Windows stuff
*/
private final static String windowsParseMacAddress(String ipConfigResponse) throws ParseException {
String localHost = null;
try {
localHost = InetAddress.getLocalHost().getHostAddress();
} catch(java.net.UnknownHostException ex) {
ex.printStackTrace();
throw new ParseException(ex.getMessage(), 0);
}
StringTokenizer tokenizer = new StringTokenizer(ipConfigResponse, "\n");
String lastMacAddress = null;
while(tokenizer.hasMoreTokens()) {
String line = tokenizer.nextToken().trim();
// see if line contains IP address
if(line.endsWith(localHost) && lastMacAddress != null) {
return lastMacAddress;
}
// see if line contains MAC address
int macAddressPosition = line.indexOf(":");
if(macAddressPosition <= 0) continue;
String macAddressCandidate = line.substring(macAddressPosition + 1).trim();
if(windowsIsMacAddress(macAddressCandidate)) {
lastMacAddress = macAddressCandidate;
continue;
}
}
ParseException ex = new ParseException("cannot read MAC address from [" + ipConfigResponse + "]", 0);
ex.printStackTrace();
throw ex;
}
private final static boolean windowsIsMacAddress(String macAddressCandidate) {
Pattern macPattern = Pattern.compile("[0-9a-fA-F]{2}[-:][0-9a-fA-F]{2}[-:][0-9a-fA-F]{2}[-:][0-9a-fA-F]{2}[-:][0 -9a-fA-F]{2}[-:][0-9a-fA-F]{2}");
Matcher m = macPattern.matcher(macAddressCandidate);
return m.matches();
}
private final static String windowsRunIpConfigCommand() throws IOException {
Process p = Runtime.getRuntime().exec("ipconfig /all");
InputStream stdoutStream = new BufferedInputStream(p.getInputStream());
StringBuffer buffer= new StringBuffer();
for (;;) {
int c = stdoutStream.read();
if (c == -1) break;
buffer.append((char)c);
}
String outputText = buffer.toString();
stdoutStream.close();
return outputText;
}
/*
* Mac OS X Stuff
*/
private final static String osxParseMacAddress(String ipConfigResponse) throws ParseException {
String localHost = null;
try {
localHost = InetAddress.getLocalHost().getHostAddress();
} catch(java.net.UnknownHostException ex) {
ex.printStackTrace();
throw new ParseException(ex.getMessage(), 0);
}
StringTokenizer tokenizer = new StringTokenizer(ipConfigResponse, "\n");
while(tokenizer.hasMoreTokens()) {
String line = tokenizer.nextToken().trim();
boolean containsLocalHost = line.indexOf(localHost) >= 0;
// see if line contains MAC address
int macAddressPosition = line.indexOf("ether");
if(macAddressPosition != 0) continue;
String macAddressCandidate = line.substring(macAddressPosition + 6).trim();
if(osxIsMacAddress(macAddressCandidate)) {
return macAddressCandidate;
}
}
ParseException ex = new ParseException
("cannot read MAC address for " + localHost + " from [" + ipConfigResponse + "]", 0);
ex.printStackTrace();
throw ex;
}
private final static boolean osxIsMacAddress(String macAddressCandidate) {
Pattern macPattern = Pattern.compile("[0-9a-fA-F]{2}[-:][0-9a-fA-F]{2}[-:][0-9a-fA-F]{2}[-:][0-9a-fA-F]{2}[-:][0 -9a-fA-F]{2}[-:][0-9a-fA-F]{2}");
Matcher m = macPattern.matcher(macAddressCandidate);
return m.matches();
}
private final static String osxRunIfConfigCommand() throws IOException {
Process p = Runtime.getRuntime().exec("ifconfig");
InputStream stdoutStream = new BufferedInputStream(p.getInputStream());
StringBuffer buffer= new StringBuffer();
for (;;) {
int c = stdoutStream.read();
if (c == -1) break;
buffer.append((char)c);
}
String outputText = buffer.toString();
stdoutStream.close();
return outputText;
}
/*
* Main
*/
public final static void main(String[] args) {
try {
System.out.println("Network info:");
System.out.println(" Operating System: " + System.getProperty("os.name"));
System.out.println(" IP/Localhost: " + InetAddress.getLocalHost().getHostAddress());
System.out.println(" MAC Address: " + getMacAddress());
} catch(Throwable t) {
t.printStackTrace();
}
}
}