macnificent

Marty Lamb mlamb@martiansoftware.com at Martian Software, Inc.

Macnificent is a set of utility classes for working with MAC addresses in Java. In addition to a lightweight MacAddress class and parser, this includes IEEE OUI registry information and a formatter for MAC addresses that displays an abbreviated form of the device's manufacturer's name.

The OuiRegistry class needs a data file at runtime, which it attempts to load from its ClassLoader as a resource with the name macnificent.dat. This can be created by downloading the raw OUI-48 registry from the IEEE website and executing the following command (see GenerateDataFile.java for more info):

cat oui.txt | mvn -q exec:java -Dexec.mainClass=com.martiansoftware.macnificent.GenerateDataFile > macnificent.dat

Example Usage:

The following main() method is included in the OuiRegistry class provided with this project. It showcases functionality fairly well:

public static void main(String[] args) throws Exception {
    OuiRegistry reg = new OuiRegistry();
    System.out.println("OuiRegistry loaded with " + reg.size() + " entries.");
    System.out.println("Enter MAC addresses (one per line) to try it out.");

    java.io.LineNumberReader in = new java.io.LineNumberReader(new java.io.InputStreamReader(System.in));
    String s = in.readLine();
    while (s != null) {
        MacAddress mac = new MacAddress(s); // can also create from byte[] or NetworkInterface
        Oui oui = reg.getOui(mac);
        System.out.println("   MAC Address:  " + mac);
        System.out.println("   isMulticast:  " + mac.isMulticast());
        System.out.println("       isLocal:  " + mac.isLocal());
        System.out.println("  Manufacturer:  " + (oui == null ? "Unknown" : oui.getManufacturer()));
        System.out.println("   Reformatted:  " + reg.format(mac));
        System.out.println();
        s = in.readLine();
    }

}

Add the dependency to your project:

<dependencies>
	<dependency>
		<groupId>com.martiansoftware</groupId>
		<artifactId>macnificent</artifactId>
		<version>1.0.0</version>
		<scope>compile</scope>
	</dependency>
</dependencies>