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.protocol.ver1; |
| 17 | |
| 18 | import java.util.LinkedList; |
| 19 | import java.util.ListIterator; |
| 20 | |
| 21 | import org.jboss.netty.buffer.ChannelBuffer; |
| 22 | import org.onosproject.pcepio.exceptions.PcepParseException; |
| 23 | import org.onosproject.pcepio.protocol.PcepError; |
| 24 | import org.onosproject.pcepio.protocol.PcepErrorObject; |
| 25 | import org.onosproject.pcepio.protocol.PcepRPObject; |
| 26 | import org.onosproject.pcepio.protocol.PcepTEObject; |
| 27 | import org.onosproject.pcepio.types.PcepObjectHeader; |
| 28 | import org.slf4j.Logger; |
| 29 | import org.slf4j.LoggerFactory; |
| 30 | |
| 31 | import com.google.common.base.MoreObjects; |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 32 | |
| 33 | /** |
| 34 | * Provides PcepError list which contains RP or TE objects. |
| 35 | * Reference:PCEP Extension for Transporting TE Data draft-dhodylee-pce-pcep-te-data-extn-02. |
| 36 | */ |
| 37 | public class PcepErrorVer1 implements PcepError { |
| 38 | |
| 39 | /* |
| 40 | <error>::=[<request-id-list> | <te-id-list>] |
| 41 | <error-obj-list> |
| 42 | |
| 43 | <request-id-list>::=<RP>[<request-id-list>] |
| 44 | |
| 45 | <te-id-list>::=<TE>[<te-id-list>] |
| 46 | */ |
| 47 | |
| 48 | protected static final Logger log = LoggerFactory.getLogger(PcepErrorVer1.class); |
| 49 | |
| 50 | private boolean isErroInfoSet; |
| 51 | //PcepErrorObject list |
| 52 | private LinkedList<PcepErrorObject> llErrObjList; |
| 53 | //PcepRPObject list |
| 54 | private LinkedList<PcepRPObject> llRPObjList; |
| 55 | //PcepTEObject list |
| 56 | private LinkedList<PcepTEObject> llTEObjList; |
| 57 | private boolean isTEObjListSet; |
| 58 | |
| 59 | public static final int OBJECT_HEADER_LENGTH = 4; |
| 60 | |
| 61 | /** |
| 62 | * Constructor to initialize variable. |
| 63 | */ |
| 64 | public PcepErrorVer1() { |
| 65 | this.llRPObjList = null; |
| 66 | this.llTEObjList = null; |
| 67 | this.llErrObjList = null; |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Constructor to initialize variable. |
| 72 | * |
| 73 | * @param llRPObjList list of PcepRPObject |
| 74 | * @param llTEObjList list of PcepTEObject |
| 75 | * @param llErrObjListObjList list of PcepErrorObject |
| 76 | */ |
| 77 | public PcepErrorVer1(LinkedList<PcepRPObject> llRPObjList, LinkedList<PcepTEObject> llTEObjList, |
| 78 | LinkedList<PcepErrorObject> llErrObjListObjList) { |
| 79 | this.llRPObjList = llRPObjList; |
| 80 | this.llTEObjList = llTEObjList; |
| 81 | this.llErrObjList = llErrObjListObjList; |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * Constructor to initialize PcepError. |
| 86 | * |
| 87 | * @param llErrObjList list of PcepErrorObject |
| 88 | */ |
| 89 | public PcepErrorVer1(LinkedList<PcepErrorObject> llErrObjList) { |
| 90 | this.llRPObjList = null; |
| 91 | this.llTEObjList = null; |
| 92 | this.llErrObjList = llErrObjList; |
| 93 | } |
| 94 | |
| 95 | @Override |
| 96 | public LinkedList<PcepRPObject> getRPObjList() { |
| 97 | return this.llRPObjList; |
| 98 | } |
| 99 | |
| 100 | @Override |
| 101 | public LinkedList<PcepTEObject> getTEObjList() { |
| 102 | return this.llTEObjList; |
| 103 | } |
| 104 | |
| 105 | @Override |
| 106 | public LinkedList<PcepErrorObject> getErrorObjList() { |
| 107 | return this.llErrObjList; |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * Parse RP List from the channel buffer. |
| 112 | * |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 113 | * @param cb of type channel buffer |
HIGUCHI Yuta | 0f3aaff | 2015-09-22 14:58:12 -0700 | [diff] [blame] | 114 | * @throws PcepParseException if mandatory fields are missing |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 115 | */ |
| 116 | public void parseRPList(ChannelBuffer cb) throws PcepParseException { |
| 117 | byte yObjClass; |
| 118 | byte yObjType; |
| 119 | |
Sho SHIMIZU | 9b8274c | 2015-09-04 15:54:24 -0700 | [diff] [blame] | 120 | llRPObjList = new LinkedList<>(); |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 121 | |
| 122 | // caller should verify for RP object |
| 123 | if (cb.readableBytes() < OBJECT_HEADER_LENGTH) { |
| 124 | log.debug("Unable to find RP Object"); |
| 125 | return; |
| 126 | } |
| 127 | |
| 128 | cb.markReaderIndex(); |
| 129 | PcepObjectHeader tempObjHeader = PcepObjectHeader.read(cb); |
| 130 | cb.resetReaderIndex(); |
| 131 | yObjClass = tempObjHeader.getObjClass(); |
| 132 | yObjType = tempObjHeader.getObjType(); |
| 133 | PcepRPObject rpObj; |
| 134 | while ((yObjClass == PcepRPObjectVer1.RP_OBJ_CLASS) && (yObjType == PcepRPObjectVer1.RP_OBJ_TYPE)) { |
| 135 | rpObj = PcepRPObjectVer1.read(cb); |
| 136 | llRPObjList.add(rpObj); |
| 137 | |
| 138 | if (cb.readableBytes() > OBJECT_HEADER_LENGTH) { |
| 139 | cb.markReaderIndex(); |
| 140 | tempObjHeader = PcepObjectHeader.read(cb); |
| 141 | cb.resetReaderIndex(); |
| 142 | yObjClass = tempObjHeader.getObjClass(); |
| 143 | yObjType = tempObjHeader.getObjType(); |
| 144 | } else { |
| 145 | break; |
| 146 | } |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | /** |
| 151 | * Parse TE List from the channel buffer. |
| 152 | * |
| 153 | * @param cb of type channel buffer |
| 154 | * @throws PcepParseException if mandatory fields are missing |
| 155 | */ |
| 156 | public void parseTEList(ChannelBuffer cb) throws PcepParseException { |
| 157 | byte yObjClass; |
| 158 | byte yObjType; |
| 159 | |
Sho SHIMIZU | 9b8274c | 2015-09-04 15:54:24 -0700 | [diff] [blame] | 160 | llTEObjList = new LinkedList<>(); |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 161 | |
| 162 | // caller should verify for TE object |
| 163 | if (cb.readableBytes() < OBJECT_HEADER_LENGTH) { |
| 164 | log.debug("Unable to find TE Object"); |
| 165 | return; |
| 166 | } |
| 167 | |
| 168 | cb.markReaderIndex(); |
| 169 | PcepObjectHeader tempObjHeader = PcepObjectHeader.read(cb); |
| 170 | cb.resetReaderIndex(); |
| 171 | yObjClass = tempObjHeader.getObjClass(); |
| 172 | yObjType = tempObjHeader.getObjType(); |
| 173 | PcepTEObject teObj; |
| 174 | while ((yObjClass == PcepTEObjectVer1.TE_OBJ_CLASS) && ((yObjType == PcepTEObjectVer1.TE_OBJ_TYPE_NODE_VALUE) |
| 175 | || (yObjType == PcepTEObjectVer1.TE_OBJ_TYPE_LINK_VALUE))) { |
| 176 | teObj = PcepTEObjectVer1.read(cb); |
| 177 | llTEObjList.add(teObj); |
| 178 | |
| 179 | if (cb.readableBytes() > OBJECT_HEADER_LENGTH) { |
| 180 | cb.markReaderIndex(); |
| 181 | tempObjHeader = PcepObjectHeader.read(cb); |
| 182 | cb.resetReaderIndex(); |
| 183 | yObjClass = tempObjHeader.getObjClass(); |
| 184 | yObjType = tempObjHeader.getObjType(); |
| 185 | } else { |
| 186 | break; |
| 187 | } |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | /** |
| 192 | * parseErrObjList from the channel buffer. |
| 193 | * |
| 194 | * @param cb of type channel buffer |
| 195 | * @throws PcepParseException if mandatory fields are missing |
| 196 | */ |
| 197 | public void parseErrObjList(ChannelBuffer cb) throws PcepParseException { |
| 198 | byte yObjClass; |
| 199 | byte yObjType; |
| 200 | boolean bIsErrorObjFound = false; |
| 201 | |
Sho SHIMIZU | 9b8274c | 2015-09-04 15:54:24 -0700 | [diff] [blame] | 202 | llErrObjList = new LinkedList<>(); |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 203 | |
| 204 | // caller should verify for RP object |
| 205 | if (cb.readableBytes() < OBJECT_HEADER_LENGTH) { |
| 206 | throw new PcepParseException("Unable to find PCEP-ERROR Object"); |
| 207 | } |
| 208 | |
| 209 | cb.markReaderIndex(); |
| 210 | PcepObjectHeader tempObjHeader = PcepObjectHeader.read(cb); |
| 211 | cb.resetReaderIndex(); |
| 212 | yObjClass = tempObjHeader.getObjClass(); |
| 213 | yObjType = tempObjHeader.getObjType(); |
| 214 | PcepErrorObject errorObject; |
| 215 | while ((yObjClass == PcepErrorObjectVer1.ERROR_OBJ_CLASS) && (yObjType == PcepErrorObjectVer1.ERROR_OBJ_TYPE)) { |
| 216 | errorObject = PcepErrorObjectVer1.read(cb); |
| 217 | llErrObjList.add(errorObject); |
| 218 | bIsErrorObjFound = true; |
| 219 | |
| 220 | if (cb.readableBytes() > OBJECT_HEADER_LENGTH) { |
| 221 | cb.markReaderIndex(); |
| 222 | tempObjHeader = PcepObjectHeader.read(cb); |
| 223 | cb.resetReaderIndex(); |
| 224 | yObjClass = tempObjHeader.getObjClass(); |
| 225 | yObjType = tempObjHeader.getObjType(); |
| 226 | } else { |
| 227 | break; |
| 228 | } |
| 229 | } |
| 230 | |
| 231 | if (!bIsErrorObjFound) { |
| 232 | throw new PcepParseException("At least one PCEP-ERROR Object should be present."); |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | /** |
| 237 | * Reads the byte stream of PcepError from channel buffer. |
| 238 | * |
| 239 | * @param cb of type channel buffer |
| 240 | * @return PcepError error part of PCEP-ERROR |
| 241 | * @throws PcepParseException if mandatory fields are missing |
| 242 | */ |
| 243 | public static PcepErrorVer1 read(ChannelBuffer cb) throws PcepParseException { |
| 244 | if (cb.readableBytes() < OBJECT_HEADER_LENGTH) { |
| 245 | throw new PcepParseException("Unknown Object"); |
| 246 | } |
| 247 | |
| 248 | PcepErrorVer1 pcepError = new PcepErrorVer1(); |
| 249 | // check whether any PCEP Error Info is present |
| 250 | cb.markReaderIndex(); |
| 251 | PcepObjectHeader tempObjHeader = PcepObjectHeader.read(cb); |
| 252 | cb.resetReaderIndex(); |
| 253 | byte yObjClass = tempObjHeader.getObjClass(); |
| 254 | |
| 255 | //If RPlist present then store it.RPList and TEList are optional |
| 256 | if (yObjClass == PcepRPObjectVer1.RP_OBJ_CLASS) { |
| 257 | log.debug("RP_LIST"); |
| 258 | pcepError.parseRPList(cb); |
| 259 | yObjClass = checkNextObject(cb); |
| 260 | } else if (yObjClass == PcepTEObjectVer1.TE_OBJ_CLASS) { |
| 261 | log.debug("TE_LIST"); |
| 262 | pcepError.parseTEList(cb); |
| 263 | yObjClass = checkNextObject(cb); |
| 264 | } |
| 265 | |
| 266 | if (yObjClass == PcepErrorObjectVer1.ERROR_OBJ_CLASS) { |
| 267 | log.debug("PCEP-ERROR obj list"); |
| 268 | pcepError.parseErrObjList(cb); |
| 269 | yObjClass = checkNextObject(cb); |
| 270 | } |
| 271 | |
| 272 | return pcepError; |
| 273 | } |
| 274 | |
| 275 | /** |
| 276 | * Checks Next Object. |
| 277 | * |
| 278 | * @param cb of type channel buffer. |
| 279 | * @return object type class. |
| 280 | */ |
| 281 | private static byte checkNextObject(ChannelBuffer cb) { |
| 282 | if (cb.readableBytes() < OBJECT_HEADER_LENGTH) { |
| 283 | return 0; |
| 284 | } |
| 285 | cb.markReaderIndex(); |
| 286 | PcepObjectHeader tempObjHeader = PcepObjectHeader.read(cb); |
| 287 | cb.resetReaderIndex(); |
| 288 | return tempObjHeader.getObjClass(); |
| 289 | } |
| 290 | |
| 291 | /** |
| 292 | * Writes the byte stream of PCEP error to the channel buffer. |
| 293 | * |
| 294 | * @param cb of type channel buffer |
| 295 | * @return object length index |
| 296 | * @throws PcepParseException if mandatory fields are missing |
| 297 | */ |
| 298 | @Override |
| 299 | public int write(ChannelBuffer cb) throws PcepParseException { |
| 300 | int iLenStartIndex = cb.writerIndex(); |
| 301 | |
| 302 | // RPlist is optional |
| 303 | if (this.isErroInfoSet) { |
| 304 | ListIterator<PcepRPObject> rpObjlistIterator = this.llRPObjList.listIterator(); |
| 305 | while (rpObjlistIterator.hasNext()) { |
| 306 | rpObjlistIterator.next().write(cb); |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | // TElist is optional |
| 311 | if (this.isTEObjListSet) { |
| 312 | ListIterator<PcepTEObject> teObjlistIterator = this.llTEObjList.listIterator(); |
| 313 | while (teObjlistIterator.hasNext()) { |
| 314 | teObjlistIterator.next().write(cb); |
| 315 | } |
| 316 | } |
| 317 | //ErrList is mandatory |
| 318 | ListIterator<PcepErrorObject> errlistIterator = this.llErrObjList.listIterator(); |
| 319 | while (errlistIterator.hasNext()) { |
| 320 | errlistIterator.next().write(cb); |
| 321 | } |
| 322 | |
| 323 | return cb.writerIndex() - iLenStartIndex; |
| 324 | } |
| 325 | |
| 326 | /** |
| 327 | * Builder for error part of PCEP-ERROR. |
| 328 | */ |
| 329 | public static class Builder implements PcepError.Builder { |
| 330 | |
| 331 | private LinkedList<PcepRPObject> llRPObjList; |
| 332 | private LinkedList<PcepTEObject> llTEObjList; |
| 333 | private LinkedList<PcepErrorObject> llErrObjList; |
| 334 | |
| 335 | @Override |
| 336 | public PcepError build() { |
| 337 | return new PcepErrorVer1(llRPObjList, llTEObjList, llErrObjList); |
| 338 | } |
| 339 | |
| 340 | @Override |
| 341 | public LinkedList<PcepRPObject> getRPObjList() { |
| 342 | return this.llRPObjList; |
| 343 | } |
| 344 | |
| 345 | @Override |
| 346 | public Builder setRPObjList(LinkedList<PcepRPObject> llRPObjList) { |
| 347 | this.llRPObjList = llRPObjList; |
| 348 | return this; |
| 349 | } |
| 350 | |
| 351 | @Override |
| 352 | public LinkedList<PcepTEObject> getTEObjList() { |
| 353 | return this.llTEObjList; |
| 354 | } |
| 355 | |
| 356 | @Override |
| 357 | public Builder setTEObjList(LinkedList<PcepTEObject> llTEObjList) { |
| 358 | this.llTEObjList = llTEObjList; |
| 359 | return this; |
| 360 | } |
| 361 | |
| 362 | @Override |
| 363 | public LinkedList<PcepErrorObject> getErrorObjList() { |
| 364 | return this.llErrObjList; |
| 365 | } |
| 366 | |
| 367 | @Override |
| 368 | public Builder setErrorObjList(LinkedList<PcepErrorObject> llErrObjList) { |
| 369 | this.llErrObjList = llErrObjList; |
| 370 | return this; |
| 371 | } |
| 372 | |
| 373 | } |
| 374 | |
| 375 | @Override |
| 376 | public void setRPObjList(LinkedList<PcepRPObject> llRPObjList) { |
| 377 | this.llRPObjList = llRPObjList; |
| 378 | } |
| 379 | |
| 380 | @Override |
| 381 | public void setTEObjList(LinkedList<PcepTEObject> llTEObjList) { |
| 382 | this.llTEObjList = llTEObjList; |
| 383 | } |
| 384 | |
| 385 | @Override |
| 386 | public void setErrorObjList(LinkedList<PcepErrorObject> llErrObjList) { |
| 387 | this.llErrObjList = llErrObjList; |
| 388 | } |
| 389 | |
| 390 | @Override |
| 391 | public String toString() { |
Sho SHIMIZU | 7cdbcf7 | 2015-09-03 14:43:05 -0700 | [diff] [blame] | 392 | return MoreObjects.toStringHelper(getClass()) |
| 393 | .omitNullValues() |
| 394 | .add("RpObjectList", llRPObjList) |
| 395 | .add("TeObjectList", llTEObjList) |
| 396 | .add("ErrorObjectList", llErrObjList) |
| 397 | .toString(); |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 398 | } |
| 399 | } |