Yotam Harchol | d7b8420 | 2013-07-26 16:08:10 -0700 | [diff] [blame] | 1 | package org.openflow.types; |
| 2 | |
| 3 | import org.jboss.netty.buffer.ChannelBuffer; |
| 4 | import org.openflow.exceptions.OFParseError; |
| 5 | |
| 6 | public enum IpEcn implements OFValueType { |
| 7 | ECN_00((byte)0), |
| 8 | ECN_01((byte)1), |
| 9 | ECN_10((byte)2), |
| 10 | ECN_11((byte)3); |
| 11 | |
| 12 | static final int LENGTH = 1; |
| 13 | |
| 14 | private final byte ecn; |
| 15 | |
| 16 | private IpEcn(byte ecn) { |
| 17 | this.ecn = ecn; |
| 18 | } |
| 19 | |
| 20 | public static IpEcn of(byte ecn) { |
| 21 | switch (ecn) { |
| 22 | case 0: |
| 23 | return ECN_00; |
| 24 | case 1: |
| 25 | return ECN_01; |
| 26 | case 2: |
| 27 | return ECN_10; |
| 28 | case 3: |
| 29 | return ECN_11; |
| 30 | default: |
| 31 | throw new IllegalArgumentException("Illegal IP ECN value: " + ecn); |
| 32 | } |
| 33 | } |
| 34 | |
| 35 | @Override |
| 36 | public int getLength() { |
| 37 | return LENGTH; |
| 38 | } |
| 39 | |
| 40 | @Override |
| 41 | public String toString() { |
| 42 | return (ecn < 3 ? "0" : "") + Integer.toBinaryString(ecn); |
| 43 | } |
| 44 | |
| 45 | public void writeByte(ChannelBuffer c) { |
| 46 | c.writeByte(this.ecn); |
| 47 | } |
| 48 | |
| 49 | public static IpEcn readByte(ChannelBuffer c) throws OFParseError { |
| 50 | return IpEcn.of((byte)(c.readUnsignedByte())); |
| 51 | } |
| 52 | |
| 53 | } |