blob: 4ba9dade8dc5445373bb183b5a3380556d8f738f [file] [log] [blame]
package net.floodlightcontroller.util;
import java.util.Arrays;
/**
* The class representing MAC address.
*
* @author Sho Shimizu (sho.shimizu@gmail.com)
*/
public class MACAddress {
public static final int MAC_ADDRESS_LENGTH = 6;
private byte[] address = new byte[MAC_ADDRESS_LENGTH];
public MACAddress(byte[] address) {
this.address = Arrays.copyOf(address, MAC_ADDRESS_LENGTH);
}
/**
* Returns a MAC address instance representing the value of the specified {@code String}.
* @param address the String representation of the MAC Address to be parsed.
* @return a MAC Address instance representing the value of the specified {@code String}.
* @throws IllegalArgumentException if the string cannot be parsed as a MAC address.
*/
public static MACAddress valueOf(String address) {
String[] elements = address.split(":");
if (elements.length != MAC_ADDRESS_LENGTH) {
throw new IllegalArgumentException(
"Specified MAC Address must contain 12 hex digits" +
" separated pairwise by :'s.");
}
byte[] addressInBytes = new byte[MAC_ADDRESS_LENGTH];
for (int i = 0; i < MAC_ADDRESS_LENGTH; i++) {
String element = elements[i];
addressInBytes[i] = (byte)Integer.parseInt(element, 16);
}
return new MACAddress(addressInBytes);
}
/**
* Returns a MAC address instance representing the specified {@code byte} array.
* @param address the byte array to be parsed.
* @return a MAC address instance representing the specified {@code byte} array.
* @throws IllegalArgumentException if the byte array cannot be parsed as a MAC address.
*/
public static MACAddress valueOf(byte[] address) {
if (address.length != MAC_ADDRESS_LENGTH) {
throw new IllegalArgumentException("the length is not " + MAC_ADDRESS_LENGTH);
}
return new MACAddress(address);
}
/**
* Returns a MAC address instance representing the specified {@code long} value.
* The lower 48 bits of the long value are used to parse as a MAC address.
* @param address the long value to be parsed. The lower 48 bits are used for a MAC address.
* @return a MAC address instance representing the specified {@code long} value.
* @throws IllegalArgumentException if the long value cannot be parsed as a MAC address.
*/
public static MACAddress valueOf(long address) {
byte[] addressInBytes = new byte[] {
(byte)((address >> 40) & 0xff),
(byte)((address >> 32) & 0xff),
(byte)((address >> 24) & 0xff),
(byte)((address >> 16) & 0xff),
(byte)((address >> 8 ) & 0xff),
(byte)((address >> 0) & 0xff)
};
return new MACAddress(addressInBytes);
}
/**
* Returns the length of the {@code MACAddress}.
* @return the length of the {@code MACAddress}.
*/
public int length() {
return address.length;
}
/**
* Returns the value of the {@code MACAddress} as a {@code byte} array.
* @return the numeric value represented by this object after conversion to type {@code byte} array.
*/
public byte[] toBytes() {
return Arrays.copyOf(address, address.length);
}
/**
* Returns the value of the {@code MACAddress} as a {@code long}.
* @return the numeric value represented by this object after conversion to type {@code long}.
*/
public long toLong() {
long mac = 0;
for (int i = 0; i < 6; i++) {
long t = (address[i] & 0xffL) << ((5 - i) * 8);
mac |= t;
}
return mac;
}
/**
* Returns {@code true} if the MAC address is the broadcast address.
* @return {@code true} if the MAC address is the broadcast address.
*/
public boolean isBroadcast() {
for (byte b : address) {
if (b != -1) // checks if equal to 0xff
return false;
}
return true;
}
/**
* Returns {@code true} if the MAC address is the multicast address.
* @return {@code true} if the MAC address is the multicast address.
*/
public boolean isMulticast() {
if (isBroadcast()) {
return false;
}
return (address[0] & 0x01) != 0;
}
@Override
public boolean equals(Object o) {
if (o == this) {
return true;
}
if (!(o instanceof MACAddress)) {
return false;
}
MACAddress other = (MACAddress)o;
return Arrays.equals(this.address, other.address);
}
@Override
public int hashCode() {
return Arrays.hashCode(this.address);
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
for (byte b: address) {
if (builder.length() > 0) {
builder.append(":");
}
builder.append(String.format("%02X", b & 0xFF));
}
return builder.toString();
}
}