Yi Tseng | ca34e1d | 2017-07-18 16:16:25 -0700 | [diff] [blame] | 1 | /* |
Brian O'Connor | a09fe5b | 2017-08-03 21:12:30 -0700 | [diff] [blame] | 2 | * Copyright 2017-present Open Networking Foundation |
Yi Tseng | ca34e1d | 2017-07-18 16:16:25 -0700 | [diff] [blame] | 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | * |
| 16 | */ |
| 17 | |
| 18 | package org.onlab.packet.dhcp; |
| 19 | |
| 20 | import org.onlab.packet.BasePacket; |
| 21 | import org.onlab.packet.Deserializer; |
| 22 | import org.onlab.packet.IPacket; |
| 23 | |
| 24 | import java.nio.ByteBuffer; |
| 25 | |
| 26 | public class Dhcp6Duid extends BasePacket { |
| 27 | private static final int DEFAULT_LLT_LEN = 8; |
| 28 | private static final int DEFAULT_EN_LEN = 6; |
| 29 | private static final int DEFAULT_LL_LEN = 4; |
| 30 | public enum DuidType { |
| 31 | DUID_LLT((short) 1), |
| 32 | DUID_EN((short) 2), |
| 33 | DUID_LL((short) 3); |
| 34 | |
| 35 | private short value; |
| 36 | DuidType(short value) { |
| 37 | this.value = value; |
| 38 | } |
| 39 | |
| 40 | public short getValue() { |
| 41 | return value; |
| 42 | } |
| 43 | |
| 44 | public static DuidType of(short type) { |
| 45 | switch (type) { |
| 46 | case 1: |
| 47 | return DUID_LLT; |
| 48 | case 2: |
| 49 | return DUID_EN; |
| 50 | case 3: |
| 51 | return DUID_LL; |
| 52 | default: |
| 53 | throw new RuntimeException("Unknown type: " + type); |
| 54 | } |
| 55 | } |
| 56 | } |
| 57 | // general field |
| 58 | private DuidType duidType; |
| 59 | |
| 60 | // fields for DUID_LLT & DUID_LL |
| 61 | private short hardwareType; |
| 62 | private int duidTime; |
| 63 | private byte[] linkLayerAddress; |
| 64 | |
| 65 | // fields for DUID_EN |
| 66 | private int enterpriseNumber; |
| 67 | private byte[] identifier; |
| 68 | |
| 69 | public DuidType getDuidType() { |
| 70 | return duidType; |
| 71 | } |
| 72 | |
| 73 | public void setDuidType(DuidType duidType) { |
| 74 | this.duidType = duidType; |
| 75 | } |
| 76 | |
| 77 | public short getHardwareType() { |
| 78 | return hardwareType; |
| 79 | } |
| 80 | |
| 81 | public void setHardwareType(short hardwareType) { |
| 82 | this.hardwareType = hardwareType; |
| 83 | } |
| 84 | |
| 85 | public int getDuidTime() { |
| 86 | return duidTime; |
| 87 | } |
| 88 | |
| 89 | public void setDuidTime(int duidTime) { |
| 90 | this.duidTime = duidTime; |
| 91 | } |
| 92 | |
| 93 | public byte[] getLinkLayerAddress() { |
| 94 | return linkLayerAddress; |
| 95 | } |
| 96 | |
| 97 | public void setLinkLayerAddress(byte[] linkLayerAddress) { |
| 98 | this.linkLayerAddress = linkLayerAddress; |
| 99 | } |
| 100 | |
| 101 | public int getEnterpriseNumber() { |
| 102 | return enterpriseNumber; |
| 103 | } |
| 104 | |
| 105 | public void setEnterpriseNumber(int enterpriseNumber) { |
| 106 | this.enterpriseNumber = enterpriseNumber; |
| 107 | } |
| 108 | |
| 109 | public byte[] getIdentifier() { |
| 110 | return identifier; |
| 111 | } |
| 112 | |
| 113 | public void setIdentifier(byte[] identifier) { |
| 114 | this.identifier = identifier; |
| 115 | } |
| 116 | |
| 117 | @Override |
| 118 | public byte[] serialize() { |
| 119 | ByteBuffer byteBuffer; |
| 120 | switch (duidType) { |
| 121 | case DUID_LLT: |
| 122 | byteBuffer = ByteBuffer.allocate(DEFAULT_LLT_LEN + linkLayerAddress.length); |
| 123 | byteBuffer.putShort(duidType.value); |
| 124 | byteBuffer.putShort(hardwareType); |
| 125 | byteBuffer.putInt(duidTime); |
| 126 | byteBuffer.put(linkLayerAddress); |
| 127 | break; |
| 128 | case DUID_EN: |
| 129 | byteBuffer = ByteBuffer.allocate(DEFAULT_EN_LEN + identifier.length); |
| 130 | byteBuffer.putShort(duidType.value); |
| 131 | byteBuffer.putInt(enterpriseNumber); |
| 132 | byteBuffer.put(identifier); |
| 133 | break; |
| 134 | case DUID_LL: |
| 135 | byteBuffer = ByteBuffer.allocate(DEFAULT_LL_LEN + linkLayerAddress.length); |
| 136 | byteBuffer.putShort(duidType.value); |
| 137 | byteBuffer.putShort(hardwareType); |
| 138 | byteBuffer.put(linkLayerAddress); |
| 139 | break; |
| 140 | default: |
| 141 | throw new RuntimeException("Unknown duidType: " + duidType.toString()); |
| 142 | } |
| 143 | return byteBuffer.array(); |
| 144 | } |
| 145 | |
| 146 | @Override |
| 147 | public IPacket deserialize(byte[] data, int offset, int length) { |
| 148 | return null; |
| 149 | } |
| 150 | |
| 151 | public static Deserializer<Dhcp6Duid> deserializer() { |
| 152 | return (data, offset, length) -> { |
| 153 | Dhcp6Duid duid = new Dhcp6Duid(); |
| 154 | ByteBuffer byteBuffer = ByteBuffer.wrap(data, offset, length); |
| 155 | |
| 156 | DuidType duidType = DuidType.of(byteBuffer.getShort()); |
| 157 | duid.setDuidType(duidType); |
| 158 | switch (duidType) { |
| 159 | case DUID_LLT: |
| 160 | duid.setHardwareType(byteBuffer.getShort()); |
| 161 | duid.setDuidTime(byteBuffer.getInt()); |
| 162 | duid.linkLayerAddress = new byte[length - DEFAULT_LLT_LEN]; |
| 163 | byteBuffer.get(duid.linkLayerAddress); |
| 164 | break; |
| 165 | case DUID_EN: |
| 166 | duid.setEnterpriseNumber(byteBuffer.getInt()); |
| 167 | duid.identifier = new byte[length - DEFAULT_EN_LEN]; |
| 168 | byteBuffer.get(duid.identifier); |
| 169 | break; |
| 170 | case DUID_LL: |
| 171 | duid.setHardwareType(byteBuffer.getShort()); |
| 172 | duid.linkLayerAddress = new byte[length - DEFAULT_LL_LEN]; |
| 173 | byteBuffer.get(duid.linkLayerAddress); |
| 174 | break; |
| 175 | default: |
| 176 | throw new RuntimeException("Unknown type: " + duidType); |
| 177 | } |
| 178 | return duid; |
| 179 | }; |
| 180 | } |
| 181 | } |