Yotam Harchol | f3f1115 | 2013-09-05 16:47:16 -0700 | [diff] [blame] | 1 | package org.projectfloodlight.openflow.types; |
| 2 | |
| 3 | import org.jboss.netty.buffer.ChannelBuffer; |
| 4 | import org.projectfloodlight.openflow.exceptions.OFParseError; |
| 5 | import org.projectfloodlight.openflow.util.HexString; |
| 6 | |
| 7 | /** |
| 8 | * Wrapper around a 6 byte mac address. |
| 9 | * |
| 10 | * @author Andreas Wundsam <andreas.wundsam@bigswitch.com> |
| 11 | */ |
| 12 | |
| 13 | public class MacAddress implements OFValueType<MacAddress> { |
| 14 | static final int MacAddrLen = 6; |
| 15 | private final long rawValue; |
| 16 | |
Andreas Wundsam | b75c4ad | 2013-09-23 14:45:35 -0700 | [diff] [blame] | 17 | private final static long NONE_VAL = 0x0L; |
| 18 | public static final MacAddress NONE = new MacAddress(NONE_VAL); |
| 19 | |
Yotam Harchol | f3f1115 | 2013-09-05 16:47:16 -0700 | [diff] [blame] | 20 | public static final MacAddress NO_MASK = MacAddress.of(0xFFFFFFFFFFFFFFFFl); |
| 21 | public static final MacAddress FULL_MASK = MacAddress.of(0x0); |
| 22 | |
| 23 | private MacAddress(final long rawValue) { |
| 24 | this.rawValue = rawValue; |
| 25 | } |
| 26 | |
| 27 | public static MacAddress of(final byte[] address) { |
| 28 | long raw = |
| 29 | (address[0] & 0xFFL) << 40 | (address[1] & 0xFFL) << 32 |
| 30 | | (address[2] & 0xFFL) << 24 | (address[3] & 0xFFL) << 16 |
| 31 | | (address[4] & 0xFFL) << 8 | (address[5] & 0xFFL); |
| 32 | return MacAddress.of(raw); |
| 33 | } |
| 34 | |
| 35 | public static MacAddress of(final long raw) { |
Andreas Wundsam | b75c4ad | 2013-09-23 14:45:35 -0700 | [diff] [blame] | 36 | if(raw == NONE_VAL) |
| 37 | return NONE; |
| 38 | |
Yotam Harchol | f3f1115 | 2013-09-05 16:47:16 -0700 | [diff] [blame] | 39 | return new MacAddress(raw); |
| 40 | } |
| 41 | |
| 42 | public static MacAddress of(final String string) { |
| 43 | int index = 0; |
| 44 | int shift = 40; |
| 45 | |
| 46 | long raw = 0; |
| 47 | if (string.length() != 6 * 2 + 5) |
| 48 | throw new IllegalArgumentException("Mac address not well formed: " + string); |
| 49 | |
| 50 | while (shift >= 0) { |
| 51 | raw |= |
| 52 | ((long) (Character.digit(string.charAt(index++), 16) << 4 | Character |
| 53 | .digit(string.charAt(index++), 16))) << shift; |
| 54 | |
| 55 | if (shift == 0) |
| 56 | break; |
| 57 | if (string.charAt(index++) != ':') |
| 58 | throw new IllegalArgumentException("Mac address not well formed: " + string); |
| 59 | shift -= 8; |
| 60 | } |
| 61 | return MacAddress.of(raw); |
| 62 | } |
| 63 | |
| 64 | volatile byte[] bytesCache = null; |
| 65 | |
| 66 | public byte[] getBytes() { |
| 67 | if (bytesCache == null) { |
| 68 | synchronized (this) { |
| 69 | if (bytesCache == null) { |
| 70 | bytesCache = |
| 71 | new byte[] { (byte) ((rawValue >> 40) & 0xFF), |
| 72 | (byte) ((rawValue >> 32) & 0xFF), |
| 73 | (byte) ((rawValue >> 24) & 0xFF), |
| 74 | (byte) ((rawValue >> 16) & 0xFF), |
| 75 | (byte) ((rawValue >> 8) & 0xFF), |
| 76 | (byte) ((rawValue >> 0) & 0xFF) }; |
| 77 | } |
| 78 | } |
| 79 | } |
| 80 | return bytesCache; |
| 81 | } |
| 82 | |
| 83 | @Override |
| 84 | public int getLength() { |
| 85 | return MacAddrLen; |
| 86 | } |
| 87 | |
| 88 | @Override |
| 89 | public String toString() { |
| 90 | return HexString.toHexString(rawValue, 6); |
| 91 | } |
| 92 | |
| 93 | @Override |
| 94 | public int hashCode() { |
| 95 | final int prime = 31; |
| 96 | int result = 1; |
| 97 | result = prime * result + (int) (rawValue ^ (rawValue >>> 32)); |
| 98 | return result; |
| 99 | } |
| 100 | |
| 101 | @Override |
| 102 | public boolean equals(final Object obj) { |
| 103 | if (this == obj) |
| 104 | return true; |
| 105 | if (obj == null) |
| 106 | return false; |
| 107 | if (getClass() != obj.getClass()) |
| 108 | return false; |
| 109 | MacAddress other = (MacAddress) obj; |
| 110 | if (rawValue != other.rawValue) |
| 111 | return false; |
| 112 | return true; |
| 113 | } |
| 114 | |
| 115 | public long getLong() { |
| 116 | return rawValue; |
| 117 | } |
| 118 | |
| 119 | public void write6Bytes(ChannelBuffer c) { |
| 120 | c.writeInt((int) (this.rawValue >> 16)); |
| 121 | c.writeShort((int) this.rawValue & 0xFFFF); |
| 122 | } |
| 123 | |
| 124 | public static MacAddress read6Bytes(ChannelBuffer c) throws OFParseError { |
| 125 | long raw = c.readUnsignedInt() << 16 | c.readUnsignedShort(); |
| 126 | return MacAddress.of(raw); |
| 127 | } |
| 128 | |
| 129 | @Override |
| 130 | public MacAddress applyMask(MacAddress mask) { |
| 131 | return MacAddress.of(this.rawValue & mask.rawValue); |
| 132 | } |
| 133 | |
| 134 | |
| 135 | |
| 136 | } |