| package org.projectfloodlight.openflow.types; |
| |
| import org.jboss.netty.buffer.ChannelBuffer; |
| import org.projectfloodlight.openflow.exceptions.OFParseError; |
| import org.projectfloodlight.openflow.util.HexString; |
| |
| import com.google.common.hash.PrimitiveSink; |
| import com.google.common.primitives.Longs; |
| |
| /** |
| * Wrapper around a 6 byte mac address. |
| * |
| * @author Andreas Wundsam <andreas.wundsam@bigswitch.com> |
| */ |
| |
| public class MacAddress implements OFValueType<MacAddress> { |
| static final int MacAddrLen = 6; |
| private final long rawValue; |
| |
| private final static long NONE_VAL = 0x0L; |
| public static final MacAddress NONE = new MacAddress(NONE_VAL); |
| |
| private final static long BROADCAST_VAL = 0x0000FFFFFFFFFFFFL; |
| public static final MacAddress BROADCAST = new MacAddress(BROADCAST_VAL); |
| |
| public static final MacAddress NO_MASK = MacAddress.of(0xFFFFFFFFFFFFFFFFl); |
| public static final MacAddress FULL_MASK = MacAddress.of(0x0); |
| |
| private MacAddress(final long rawValue) { |
| this.rawValue = rawValue; |
| } |
| |
| public static MacAddress of(final byte[] address) { |
| if (address.length != MacAddrLen) |
| throw new IllegalArgumentException( |
| "Mac address byte array must be exactly 6 bytes long; length = " + address.length); |
| long raw = |
| (address[0] & 0xFFL) << 40 | (address[1] & 0xFFL) << 32 |
| | (address[2] & 0xFFL) << 24 | (address[3] & 0xFFL) << 16 |
| | (address[4] & 0xFFL) << 8 | (address[5] & 0xFFL); |
| return MacAddress.of(raw); |
| } |
| |
| public static MacAddress of(long raw) { |
| raw &= BROADCAST_VAL; |
| if(raw == NONE_VAL) |
| return NONE; |
| if (raw == BROADCAST_VAL) |
| return BROADCAST; |
| return new MacAddress(raw); |
| } |
| |
| public static MacAddress of(final String string) { |
| int index = 0; |
| int shift = 40; |
| final String FORMAT_ERROR = "Mac address is not well-formed. " + |
| "It must consist of 6 hex digit pairs separated by colons: "; |
| |
| long raw = 0; |
| if (string.length() != 6 * 2 + 5) |
| throw new IllegalArgumentException(FORMAT_ERROR + string); |
| |
| while (shift >= 0) { |
| int digit1 = Character.digit(string.charAt(index++), 16); |
| int digit2 = Character.digit(string.charAt(index++), 16); |
| if ((digit1 < 0) || (digit2 < 0)) |
| throw new IllegalArgumentException(FORMAT_ERROR + string); |
| raw |= ((long) (digit1 << 4 | digit2)) << shift; |
| |
| if (shift == 0) |
| break; |
| if (string.charAt(index++) != ':') |
| throw new IllegalArgumentException(FORMAT_ERROR + string); |
| shift -= 8; |
| } |
| return MacAddress.of(raw); |
| } |
| |
| volatile byte[] bytesCache = null; |
| |
| public byte[] getBytes() { |
| if (bytesCache == null) { |
| synchronized (this) { |
| if (bytesCache == null) { |
| bytesCache = |
| new byte[] { (byte) ((rawValue >> 40) & 0xFF), |
| (byte) ((rawValue >> 32) & 0xFF), |
| (byte) ((rawValue >> 24) & 0xFF), |
| (byte) ((rawValue >> 16) & 0xFF), |
| (byte) ((rawValue >> 8) & 0xFF), |
| (byte) ((rawValue >> 0) & 0xFF) }; |
| } |
| } |
| } |
| return bytesCache; |
| } |
| |
| /** |
| * 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() { |
| return this == BROADCAST; |
| } |
| |
| /** |
| * Returns {@code true} if the MAC address is a multicast address. |
| * @return {@code true} if the MAC address is a multicast address. |
| */ |
| public boolean isMulticast() { |
| if (isBroadcast()) { |
| return false; |
| } |
| return (rawValue & (0x01L << 40)) != 0; |
| } |
| |
| @Override |
| public int getLength() { |
| return MacAddrLen; |
| } |
| |
| @Override |
| public String toString() { |
| return HexString.toHexString(rawValue, 6); |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + (int) (rawValue ^ (rawValue >>> 32)); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(final Object obj) { |
| if (this == obj) |
| return true; |
| if (obj == null) |
| return false; |
| if (getClass() != obj.getClass()) |
| return false; |
| MacAddress other = (MacAddress) obj; |
| if (rawValue != other.rawValue) |
| return false; |
| return true; |
| } |
| |
| public long getLong() { |
| return rawValue; |
| } |
| |
| public void write6Bytes(ChannelBuffer c) { |
| c.writeInt((int) (this.rawValue >> 16)); |
| c.writeShort((int) this.rawValue & 0xFFFF); |
| } |
| |
| public static MacAddress read6Bytes(ChannelBuffer c) throws OFParseError { |
| long raw = c.readUnsignedInt() << 16 | c.readUnsignedShort(); |
| return MacAddress.of(raw); |
| } |
| |
| @Override |
| public MacAddress applyMask(MacAddress mask) { |
| return MacAddress.of(this.rawValue & mask.rawValue); |
| } |
| |
| @Override |
| public int compareTo(MacAddress o) { |
| return Longs.compare(rawValue, o.rawValue); |
| } |
| |
| @Override |
| public void putTo(PrimitiveSink sink) { |
| sink.putInt((int) (this.rawValue >> 16)); |
| sink.putShort((short) (this.rawValue & 0xFFFF)); |
| } |
| |
| |
| |
| } |