import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.InetAddress;
import java.text.ParseException;
import java.util.StringTokenizer;
public final class DireccionMac {
private final static String getMacAddress() throws IOException { String os = System.getProperty("os.name"); try { if (os.startsWith("Windows")) { return windowsParseMacAddress(windowsRunIpConfigCommand());
} else if (os.startsWith("Linux")) { return linuxParseMacAddress(linuxRunIfConfigCommand());
} else { throw new IOException("Sistema operativo desconocido: " + os); }
} catch (ParseException ex) { ex.printStackTrace();
throw new IOException(ex.getMessage());
}
}
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;
if (containsLocalHost && lastMacAddress != null) { return lastMacAddress;
}
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(
"Imposible obtener la dirección MAC " + localHost + " desde ["
+ ipConfigResponse + "]", 0);
ex.printStackTrace();
throw ex;
}
private final static boolean linuxIsMacAddress(String macAddressCandidate) { if (macAddressCandidate.length() != 17)
return false;
return true;
}
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;
}
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();
if (line.endsWith(localHost) && lastMacAddress != null) { return lastMacAddress;
}
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(
"Imposible obtener dirección MAC desde [" + ipConfigResponse
+ "]", 0);
ex.printStackTrace();
throw ex;
}
private final static boolean windowsIsMacAddress(String macAddressCandidate) { if (macAddressCandidate.length() != 17)
return false;
return true;
}
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;
}
public final static void main(String[] args) { try { System.out.println("Sistema Operativo : " + System.getProperty("os.name")); System.out.println("Dirección IP : " + InetAddress.getLocalHost().getHostAddress());
System.out.println("Dirección Física (MAC): " + getMacAddress()); } catch (Throwable t) { t.printStackTrace();
}
}
}
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