Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 Open Networking Laboratory |
| 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 | package org.onosproject.pcepio.types; |
| 17 | |
| 18 | import java.util.Iterator; |
| 19 | import java.util.LinkedList; |
| 20 | import java.util.ListIterator; |
| 21 | import java.util.Objects; |
| 22 | |
| 23 | import org.jboss.netty.buffer.ChannelBuffer; |
| 24 | import org.onosproject.pcepio.exceptions.PcepParseException; |
| 25 | import org.onosproject.pcepio.protocol.PcepVersion; |
| 26 | import org.slf4j.Logger; |
| 27 | import org.slf4j.LoggerFactory; |
| 28 | |
| 29 | import com.google.common.base.MoreObjects; |
| 30 | |
| 31 | /** |
| 32 | * Provides TE Link Descriptors TLV. |
| 33 | */ |
Sho SHIMIZU | a5356ec | 2015-09-03 13:27:38 -0700 | [diff] [blame] | 34 | public class TELinkDescriptorsTlv implements PcepValueType { |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 35 | |
| 36 | /* |
| 37 | * Reference: PCEP Extension for Transporting TE Data draft-dhodylee-pce-pcep-te-data-extn-02 |
| 38 | * 0 1 2 3 |
| 39 | 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| 40 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 41 | | Type=[TBD14] | Length | |
| 42 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 43 | | | |
| 44 | // Link Descriptor Sub-TLVs (variable) // |
| 45 | | | |
| 46 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 47 | |
| 48 | */ |
| 49 | |
Sho SHIMIZU | a5356ec | 2015-09-03 13:27:38 -0700 | [diff] [blame] | 50 | protected static final Logger log = LoggerFactory.getLogger(TELinkDescriptorsTlv.class); |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 51 | |
| 52 | public static final short TYPE = 1070; //TODD:change this TBD14 |
| 53 | public short hLength; |
| 54 | |
| 55 | public static final int TLV_HEADER_LENGTH = 4; |
| 56 | |
| 57 | // LinkDescriptors Sub-TLVs (variable) |
| 58 | private LinkedList<PcepValueType> llLinkDescriptorsSubTLVs; |
| 59 | |
| 60 | /** |
| 61 | * Constructor to initialize llLinkDescriptorsSubTLVs. |
| 62 | * |
| 63 | * @param llLinkDescriptorsSubTLVs of PcepValueType |
| 64 | */ |
Sho SHIMIZU | a5356ec | 2015-09-03 13:27:38 -0700 | [diff] [blame] | 65 | public TELinkDescriptorsTlv(LinkedList<PcepValueType> llLinkDescriptorsSubTLVs) { |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 66 | this.llLinkDescriptorsSubTLVs = llLinkDescriptorsSubTLVs; |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Returns object of TELinkDescriptorsTLV. |
| 71 | * |
| 72 | * @param llLinkDescriptorsSubTLVs of PcepValueType |
| 73 | * @return object of TELinkDescriptorsTLV |
| 74 | */ |
Sho SHIMIZU | a5356ec | 2015-09-03 13:27:38 -0700 | [diff] [blame] | 75 | public static TELinkDescriptorsTlv of(final LinkedList<PcepValueType> llLinkDescriptorsSubTLVs) { |
| 76 | return new TELinkDescriptorsTlv(llLinkDescriptorsSubTLVs); |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 77 | } |
| 78 | |
| 79 | /** |
| 80 | * Returns linked list of Link Attribute of Sub TLV. |
| 81 | * |
| 82 | * @return llLinkDescriptorsSubTLVs linked list of Link Attribute of Sub TLV |
| 83 | */ |
| 84 | public LinkedList<PcepValueType> getllLinkDescriptorsSubTLVs() { |
| 85 | return llLinkDescriptorsSubTLVs; |
| 86 | } |
| 87 | |
| 88 | @Override |
| 89 | public PcepVersion getVersion() { |
| 90 | return PcepVersion.PCEP_1; |
| 91 | } |
| 92 | |
| 93 | @Override |
| 94 | public short getType() { |
| 95 | return TYPE; |
| 96 | } |
| 97 | |
| 98 | @Override |
| 99 | public short getLength() { |
| 100 | return hLength; |
| 101 | } |
| 102 | |
| 103 | @Override |
| 104 | public int hashCode() { |
| 105 | return Objects.hash(llLinkDescriptorsSubTLVs.hashCode()); |
| 106 | } |
| 107 | |
| 108 | @Override |
| 109 | public boolean equals(Object obj) { |
| 110 | if (this == obj) { |
| 111 | return true; |
| 112 | } |
| 113 | /* |
| 114 | * Here we have a list of Tlv so to compare each sub tlv between the object |
| 115 | * we have to take a list iterator so one by one we can get each sub tlv object |
| 116 | * and can compare them. |
| 117 | * it may be possible that the size of 2 lists is not equal so we have to first check |
| 118 | * the size, if both are same then we should check for the subtlv objects otherwise |
| 119 | * we should return false. |
| 120 | */ |
Sho SHIMIZU | a5356ec | 2015-09-03 13:27:38 -0700 | [diff] [blame] | 121 | if (obj instanceof TELinkDescriptorsTlv) { |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 122 | int countObjSubTlv = 0; |
| 123 | int countOtherSubTlv = 0; |
| 124 | boolean isCommonSubTlv = true; |
Sho SHIMIZU | a5356ec | 2015-09-03 13:27:38 -0700 | [diff] [blame] | 125 | TELinkDescriptorsTlv other = (TELinkDescriptorsTlv) obj; |
| 126 | Iterator<PcepValueType> objListIterator = ((TELinkDescriptorsTlv) obj).llLinkDescriptorsSubTLVs.iterator(); |
| 127 | countObjSubTlv = ((TELinkDescriptorsTlv) obj).llLinkDescriptorsSubTLVs.size(); |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 128 | countOtherSubTlv = other.llLinkDescriptorsSubTLVs.size(); |
| 129 | if (countObjSubTlv != countOtherSubTlv) { |
| 130 | return false; |
| 131 | } else { |
| 132 | while (objListIterator.hasNext() && isCommonSubTlv) { |
| 133 | PcepValueType subTlv = objListIterator.next(); |
| 134 | isCommonSubTlv = Objects.equals(llLinkDescriptorsSubTLVs.contains(subTlv), |
| 135 | other.llLinkDescriptorsSubTLVs.contains(subTlv)); |
| 136 | } |
| 137 | return isCommonSubTlv; |
| 138 | } |
| 139 | } |
| 140 | return false; |
| 141 | } |
| 142 | |
| 143 | @Override |
| 144 | public int write(ChannelBuffer c) { |
| 145 | int tlvStartIndex = c.writerIndex(); |
| 146 | c.writeShort(TYPE); |
| 147 | int tlvLenIndex = c.writerIndex(); |
| 148 | hLength = 0; |
| 149 | c.writeShort(hLength); |
| 150 | |
| 151 | ListIterator<PcepValueType> listIterator = llLinkDescriptorsSubTLVs.listIterator(); |
| 152 | |
| 153 | while (listIterator.hasNext()) { |
| 154 | PcepValueType tlv = listIterator.next(); |
| 155 | |
| 156 | tlv.write(c); |
| 157 | |
| 158 | // need to take care of padding |
| 159 | int pad = tlv.getLength() % 4; |
| 160 | |
| 161 | if (0 != pad) { |
| 162 | pad = 4 - pad; |
| 163 | for (int i = 0; i < pad; ++i) { |
| 164 | c.writeByte((byte) 0); |
| 165 | } |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | hLength = (short) (c.writerIndex() - tlvStartIndex); |
| 170 | c.setShort(tlvLenIndex, (hLength - TLV_HEADER_LENGTH)); |
| 171 | |
| 172 | return c.writerIndex() - tlvStartIndex; |
| 173 | } |
| 174 | |
| 175 | /** |
| 176 | * Reads channel buffer and returns object of TELinkDescriptorsTLV. |
| 177 | * |
| 178 | * @param c input channel buffer |
| 179 | * @param length length |
| 180 | * @return object of TELinkDescriptorsTLV |
| 181 | * @throws PcepParseException if mandatory fields are missing |
| 182 | */ |
| 183 | public static PcepValueType read(ChannelBuffer c, short length) throws PcepParseException { |
| 184 | |
| 185 | // Node Descriptor Sub-TLVs (variable) |
Sho SHIMIZU | 9b8274c | 2015-09-04 15:54:24 -0700 | [diff] [blame] | 186 | LinkedList<PcepValueType> llLinkDescriptorsSubTLVs = new LinkedList<>(); |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 187 | |
| 188 | ChannelBuffer tempCb = c.readBytes(length); |
| 189 | |
| 190 | while (TLV_HEADER_LENGTH <= tempCb.readableBytes()) { |
| 191 | |
| 192 | PcepValueType tlv; |
| 193 | short hType = tempCb.readShort(); |
| 194 | int iValue = 0; |
| 195 | short hLength = tempCb.readShort(); |
| 196 | log.debug("sub Tlv Length" + hLength); |
| 197 | switch (hType) { |
| 198 | |
| 199 | case LinkLocalRemoteIdentifiersTlv.TYPE: |
| 200 | tlv = LinkLocalRemoteIdentifiersTlv.read(tempCb); |
| 201 | break; |
| 202 | case IPv4InterfaceAddressTlv.TYPE: |
| 203 | iValue = tempCb.readInt(); |
| 204 | tlv = new IPv4InterfaceAddressTlv(iValue); |
| 205 | break; |
| 206 | case IPv4NeighborAddressTlv.TYPE: |
| 207 | iValue = tempCb.readInt(); |
| 208 | tlv = new IPv4NeighborAddressTlv(iValue); |
| 209 | break; |
| 210 | case IPv6InterfaceAddressTlv.TYPE: |
| 211 | byte[] ipv6Value = new byte[IPv6InterfaceAddressTlv.VALUE_LENGTH]; |
| 212 | tempCb.readBytes(ipv6Value, 0, IPv6InterfaceAddressTlv.VALUE_LENGTH); |
| 213 | tlv = new IPv6InterfaceAddressTlv(ipv6Value); |
| 214 | break; |
| 215 | case IPv6NeighborAddressTlv.TYPE: |
| 216 | byte[] ipv6NeighborAdd = new byte[IPv6NeighborAddressTlv.VALUE_LENGTH]; |
| 217 | tempCb.readBytes(ipv6NeighborAdd, 0, IPv6NeighborAddressTlv.VALUE_LENGTH); |
| 218 | tlv = new IPv6NeighborAddressTlv(ipv6NeighborAdd); |
| 219 | break; |
| 220 | default: |
| 221 | throw new PcepParseException("Unsupported Sub TLV type:" + hType); |
| 222 | } |
| 223 | |
| 224 | // Check for the padding |
| 225 | int pad = hLength % 4; |
| 226 | if (0 < pad) { |
| 227 | pad = 4 - pad; |
| 228 | if (pad <= tempCb.readableBytes()) { |
| 229 | tempCb.skipBytes(pad); |
| 230 | } |
| 231 | } |
| 232 | llLinkDescriptorsSubTLVs.add(tlv); |
| 233 | |
| 234 | } |
| 235 | |
| 236 | if (0 < tempCb.readableBytes()) { |
| 237 | |
| 238 | throw new PcepParseException("Sub Tlv parsing error. Extra bytes received."); |
| 239 | } |
Sho SHIMIZU | a5356ec | 2015-09-03 13:27:38 -0700 | [diff] [blame] | 240 | return new TELinkDescriptorsTlv(llLinkDescriptorsSubTLVs); |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | @Override |
| 244 | public String toString() { |
Sho SHIMIZU | 7cdbcf7 | 2015-09-03 14:43:05 -0700 | [diff] [blame] | 245 | return MoreObjects.toStringHelper(getClass()) |
| 246 | .add("Type", TYPE) |
| 247 | .add("Length", hLength) |
| 248 | .add("LinkDescriptorsSubTLVs", llLinkDescriptorsSubTLVs) |
| 249 | .toString(); |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 250 | } |
| 251 | } |