Andreas Wundsam | 40e14f7 | 2013-05-06 14:49:08 -0700 | [diff] [blame] | 1 | package org.openflow.types; |
| 2 | |
| 3 | import org.jboss.netty.buffer.ChannelBuffer; |
| 4 | import org.openflow.exceptions.OFParseError; |
| 5 | import org.openflow.exceptions.OFShortWrite; |
| 6 | import org.openflow.protocol.OFObject; |
| 7 | import org.openflow.util.HexString; |
| 8 | |
| 9 | /** |
| 10 | * Wrapper around a 6 byte mac address. |
| 11 | * |
| 12 | * @author Andreas Wundsam <andreas.wundsam@bigswitch.com> |
| 13 | */ |
| 14 | |
| 15 | public class MacAddress implements OFObject { |
| 16 | static final int MacAddrLen = 6; |
| 17 | private final long rawValue; |
| 18 | |
| 19 | private MacAddress(final long rawValue) { |
| 20 | this.rawValue = rawValue; |
| 21 | } |
| 22 | |
| 23 | public static MacAddress of(final byte[] address) { |
| 24 | long raw = |
| 25 | (address[0] & 0xFFL) << 40 | (address[1] & 0xFFL) << 32 |
| 26 | | (address[2] & 0xFFL) << 24 | (address[3] & 0xFFL) << 16 |
| 27 | | (address[4] & 0xFFL) << 8 | (address[5] & 0xFFL); |
| 28 | return MacAddress.of(raw); |
| 29 | } |
| 30 | |
| 31 | public static MacAddress of(final long raw) { |
| 32 | return new MacAddress(raw); |
| 33 | } |
| 34 | |
| 35 | public static MacAddress of(final String string) { |
| 36 | int index = 0; |
| 37 | int shift = 40; |
| 38 | |
| 39 | long raw = 0; |
| 40 | if (string.length() != 6 * 2 + 5) |
| 41 | throw new IllegalArgumentException("Mac address not well formed: " + string); |
| 42 | |
| 43 | while (shift >= 0) { |
| 44 | raw |= |
| 45 | ((long) (Character.digit(string.charAt(index++), 16) << 4 | Character |
| 46 | .digit(string.charAt(index++), 16))) << shift; |
| 47 | |
| 48 | if (shift == 0) |
| 49 | break; |
| 50 | if (string.charAt(index++) != ':') |
| 51 | throw new IllegalArgumentException("Mac address not well formed: " + string); |
| 52 | shift -= 8; |
| 53 | } |
| 54 | return MacAddress.of(raw); |
| 55 | } |
| 56 | |
| 57 | volatile byte[] bytesCache = null; |
| 58 | |
| 59 | public byte[] getBytes() { |
| 60 | if (bytesCache == null) { |
| 61 | synchronized (this) { |
| 62 | if (bytesCache == null) { |
| 63 | bytesCache = |
| 64 | new byte[] { (byte) ((rawValue >> 40) & 0xFF), |
| 65 | (byte) ((rawValue >> 32) & 0xFF), |
| 66 | (byte) ((rawValue >> 24) & 0xFF), |
| 67 | (byte) ((rawValue >> 16) & 0xFF), |
| 68 | (byte) ((rawValue >> 8) & 0xFF), |
| 69 | (byte) ((rawValue >> 0) & 0xFF) }; |
| 70 | } |
| 71 | } |
| 72 | } |
| 73 | return bytesCache; |
| 74 | } |
| 75 | |
| 76 | @Override |
| 77 | public int getLength() { |
| 78 | return MacAddrLen; |
| 79 | } |
| 80 | |
| 81 | public static MacAddress readFrom(final ChannelBuffer bb) throws OFParseError { |
| 82 | long raw = bb.readUnsignedInt() << 16 | bb.readUnsignedShort(); |
| 83 | return MacAddress.of(raw); |
| 84 | } |
| 85 | |
| 86 | @Override |
| 87 | public void writeTo(final ChannelBuffer bb) throws OFParseError, OFShortWrite { |
| 88 | bb.writeInt((int) (rawValue >> 16)); |
| 89 | bb.writeShort((int) rawValue & 0xFFFF); |
| 90 | } |
| 91 | |
| 92 | @Override |
| 93 | public String toString() { |
| 94 | return HexString.toHexString(rawValue, 6); |
| 95 | } |
| 96 | |
| 97 | @Override |
| 98 | public int hashCode() { |
| 99 | final int prime = 31; |
| 100 | int result = 1; |
| 101 | result = prime * result + (int) (rawValue ^ (rawValue >>> 32)); |
| 102 | return result; |
| 103 | } |
| 104 | |
| 105 | @Override |
| 106 | public boolean equals(final Object obj) { |
| 107 | if (this == obj) |
| 108 | return true; |
| 109 | if (obj == null) |
| 110 | return false; |
| 111 | if (getClass() != obj.getClass()) |
| 112 | return false; |
| 113 | MacAddress other = (MacAddress) obj; |
| 114 | if (rawValue != other.rawValue) |
| 115 | return false; |
| 116 | return true; |
| 117 | } |
| 118 | |
| 119 | public long getLong() { |
| 120 | return rawValue; |
| 121 | } |
| 122 | |
| 123 | } |