Thomas Vachuska | 58de416 | 2015-09-10 16:15:33 -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 | */ |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 16 | package org.onosproject.pcepio.protocol.ver1; |
| 17 | |
| 18 | import java.util.LinkedList; |
| 19 | |
| 20 | import org.jboss.netty.buffer.ChannelBuffer; |
| 21 | import org.onosproject.pcepio.exceptions.PcepParseException; |
| 22 | import org.onosproject.pcepio.protocol.PcepErrorInfo; |
| 23 | import org.onosproject.pcepio.protocol.PcepErrorMsg; |
| 24 | import org.onosproject.pcepio.protocol.PcepErrorObject; |
| 25 | import org.onosproject.pcepio.protocol.PcepMessageReader; |
| 26 | import org.onosproject.pcepio.protocol.PcepMessageWriter; |
| 27 | import org.onosproject.pcepio.protocol.PcepOpenObject; |
| 28 | import org.onosproject.pcepio.protocol.PcepType; |
| 29 | import org.onosproject.pcepio.protocol.PcepVersion; |
| 30 | import org.onosproject.pcepio.types.ErrorObjListWithOpen; |
| 31 | import org.onosproject.pcepio.types.PcepObjectHeader; |
| 32 | import org.slf4j.Logger; |
| 33 | import org.slf4j.LoggerFactory; |
| 34 | |
| 35 | import com.google.common.base.MoreObjects; |
| 36 | import com.google.common.base.MoreObjects.ToStringHelper; |
| 37 | |
| 38 | /** |
| 39 | * Provides PCEP Error Message. |
| 40 | */ |
| 41 | public class PcepErrorMsgVer1 implements PcepErrorMsg { |
| 42 | |
| 43 | /* |
| 44 | * PCE Error message format. |
| 45 | |
| 46 | <PCErr Message> ::= <Common Header> |
| 47 | ( <error-obj-list> [<Open>] ) | <error> |
| 48 | [<error-list>] |
| 49 | |
| 50 | <error-obj-list> ::=<PCEP-ERROR>[<error-obj-list>] |
| 51 | |
| 52 | <error> ::=[<request-id-list> | <te-id-list>] |
| 53 | <error-obj-list> |
| 54 | |
| 55 | <request-id-list> ::=<RP>[<request-id-list>] |
| 56 | |
| 57 | <te-id-list> ::=<TE>[<te-id-list>] |
| 58 | |
| 59 | <error-list> ::=<error>[<error-list>] |
| 60 | */ |
| 61 | |
| 62 | protected static final Logger log = LoggerFactory.getLogger(PcepOpenMsgVer1.class); |
| 63 | public static final byte PACKET_VERSION = 1; |
| 64 | public static final int PACKET_MINIMUM_LENGTH = 12; |
| 65 | public static final PcepType MSG_TYPE = PcepType.ERROR; |
| 66 | |
| 67 | //Below either one should be present. |
| 68 | private ErrorObjListWithOpen errObjListWithOpen; //optional ( <error-obj-list> [<Open>] ) |
| 69 | private PcepErrorInfo errInfo; //optional <error> [<error-list>] |
| 70 | |
| 71 | public static final PcepErrorMsgVer1.Reader READER = new Reader(); |
| 72 | |
| 73 | /** |
| 74 | * constructor to initialize variables. |
| 75 | */ |
| 76 | public PcepErrorMsgVer1() { |
| 77 | errObjListWithOpen = null; |
| 78 | errInfo = null; |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Constructor to initialize variables. |
| 83 | * |
| 84 | * @param errObjListWithOpen error-object-list with open object |
| 85 | * @param errInfo error information |
| 86 | */ |
| 87 | public PcepErrorMsgVer1(ErrorObjListWithOpen errObjListWithOpen, PcepErrorInfo errInfo) { |
| 88 | this.errObjListWithOpen = errObjListWithOpen; |
| 89 | this.errInfo = errInfo; |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Reader class for reading PCEP error Message from channel buffer. |
| 94 | */ |
| 95 | public static class Reader implements PcepMessageReader<PcepErrorMsg> { |
| 96 | |
| 97 | ErrorObjListWithOpen errObjListWithOpen; |
| 98 | PcepErrorInfo errInfo; |
| 99 | PcepObjectHeader tempObjHeader; |
| 100 | |
| 101 | @Override |
| 102 | public PcepErrorMsg readFrom(ChannelBuffer cb) throws PcepParseException { |
| 103 | |
| 104 | errObjListWithOpen = null; |
| 105 | errInfo = null; |
| 106 | tempObjHeader = null; |
| 107 | |
| 108 | if (cb.readableBytes() < PACKET_MINIMUM_LENGTH) { |
| 109 | throw new PcepParseException("Packet size is less than the minimum length."); |
| 110 | } |
| 111 | |
| 112 | byte version = cb.readByte(); |
| 113 | version = (byte) (version >> PcepMessageVer1.SHIFT_FLAG); |
| 114 | if (version != PACKET_VERSION) { |
| 115 | throw new PcepParseException("Wrong version: Expected=PcepVersion.PCEP_1(1), got=" + version); |
| 116 | } |
| 117 | // fixed value property type == 1 |
| 118 | byte type = cb.readByte(); |
| 119 | if (type != MSG_TYPE.getType()) { |
| 120 | throw new PcepParseException("Wrong type: Expected=PcepType.ERROR(6), got=" + type); |
| 121 | } |
| 122 | int length = cb.readShort(); |
| 123 | if (length < PACKET_MINIMUM_LENGTH) { |
| 124 | throw new PcepParseException( |
| 125 | "Wrong length: Expected to be >= " + PACKET_MINIMUM_LENGTH + ", was: " + length); |
| 126 | } |
| 127 | |
| 128 | //parse <PCErr Message> |
| 129 | parsePCErrMsg(cb); |
| 130 | |
| 131 | // If other than RP or TE or PCEP-ERROR present then it is error. |
| 132 | if (0 < cb.readableBytes()) { |
| 133 | PcepObjectHeader tempObjHeader = PcepObjectHeader.read(cb); |
| 134 | throw new PcepParseException("Unexpected Object found. Object Class : " + tempObjHeader.getObjClass()); |
| 135 | } |
| 136 | |
| 137 | return new PcepErrorMsgVer1(errObjListWithOpen, errInfo); |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * Parsing PCErr Message. |
| 142 | * |
| 143 | * @param cb channel buffer. |
| 144 | * @throws PcepParseException if mandatory fields are missing |
| 145 | * output: this.errObjListWithOpen, this.errInfo |
| 146 | */ |
| 147 | public void parsePCErrMsg(ChannelBuffer cb) throws PcepParseException { |
| 148 | //If PCEP-ERROR list is followed by OPEN Object then store into ErrorObjListWithOpen. |
| 149 | // ( <error-obj-list> [<Open>] |
| 150 | //If PCEP-ERROR list is followed by RP or TE Object then store into errInfo. <error> [<error-list>] |
| 151 | //If only PCEP-ERROR list is present then store into ErrorObjListWithOpen. |
| 152 | PcepObjectHeader tempObjHeader; |
| 153 | LinkedList<PcepErrorObject> llErrObjList; |
| 154 | |
| 155 | if (0 >= cb.readableBytes()) { |
| 156 | throw new PcepParseException("PCEP-ERROR message came with empty objects."); |
| 157 | } |
| 158 | |
| 159 | //parse PCEP-ERROR list |
Sho SHIMIZU | 9b8274c | 2015-09-04 15:54:24 -0700 | [diff] [blame] | 160 | llErrObjList = new LinkedList<>(); |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 161 | tempObjHeader = parseErrorObjectList(llErrObjList, cb); |
| 162 | |
| 163 | //check whether OPEN-OBJECT is present. |
Sho SHIMIZU | 92cd34f | 2015-09-03 10:29:30 -0700 | [diff] [blame] | 164 | if ((tempObjHeader != null) |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 165 | && (tempObjHeader.getObjClass() == PcepOpenObjectVer1.OPEN_OBJ_CLASS)) { |
| 166 | |
| 167 | if (llErrObjList.isEmpty()) { |
| 168 | throw new PcepParseException("<error-obj-list> should be present if OPEN-OBJECT exists"); |
| 169 | } |
| 170 | |
| 171 | PcepOpenObject pcepOpenObj = PcepOpenObjectVer1.read(cb); |
| 172 | this.errObjListWithOpen = new ErrorObjListWithOpen(llErrObjList, pcepOpenObj); |
| 173 | |
Sho SHIMIZU | 92cd34f | 2015-09-03 10:29:30 -0700 | [diff] [blame] | 174 | } else if ((tempObjHeader != null) //check whether RP or TE Object is present. |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 175 | && ((tempObjHeader.getObjClass() == PcepRPObjectVer1.RP_OBJ_CLASS) |
| 176 | || (tempObjHeader.getObjClass() == PcepTEObjectVer1.TE_OBJ_CLASS))) { |
| 177 | |
| 178 | this.errInfo = new PcepErrorInfoVer1(null, null, llErrObjList); |
| 179 | this.errInfo.read(cb); |
| 180 | |
Sho SHIMIZU | 2cb7e80 | 2015-09-03 11:41:12 -0700 | [diff] [blame] | 181 | } else if (!llErrObjList.isEmpty()) { |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 182 | //If only PCEP-ERROR list is present then store it in errObjListWithOpen. |
| 183 | this.errObjListWithOpen = new ErrorObjListWithOpen(llErrObjList); |
| 184 | } else { |
| 185 | throw new PcepParseException("Empty PCEP-ERROR message."); |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | /** |
| 190 | * Parse error-obj-list. |
| 191 | * |
| 192 | * @param llErrObjList error object list output |
| 193 | * @param cb channel buffer input |
| 194 | * @throws PcepParseException if mandatory fields are missing |
| 195 | * @return error object header |
| 196 | */ |
| 197 | public PcepObjectHeader parseErrorObjectList(LinkedList<PcepErrorObject> llErrObjList, ChannelBuffer cb) |
| 198 | throws PcepParseException { |
| 199 | PcepObjectHeader tempObjHeader = null; |
| 200 | |
| 201 | while (0 < cb.readableBytes()) { |
| 202 | cb.markReaderIndex(); |
| 203 | tempObjHeader = PcepObjectHeader.read(cb); |
| 204 | cb.resetReaderIndex(); |
| 205 | if (tempObjHeader.getObjClass() == PcepErrorObjectVer1.ERROR_OBJ_CLASS) { |
| 206 | llErrObjList.add(PcepErrorObjectVer1.read(cb)); |
| 207 | } else { |
| 208 | break; |
| 209 | } |
| 210 | } |
| 211 | return tempObjHeader; |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | /** |
| 216 | * Builder class for PCEP error message. |
| 217 | */ |
| 218 | public static class Builder implements PcepErrorMsg.Builder { |
| 219 | // Pcep error message fields |
| 220 | |
| 221 | private ErrorObjListWithOpen errObjListWithOpen = null; //optional ( <error-obj-list> [<Open>] ) |
| 222 | private PcepErrorInfo errInfo = null; //optional <error> [<error-list>] |
| 223 | |
| 224 | @Override |
| 225 | public PcepVersion getVersion() { |
| 226 | return PcepVersion.PCEP_1; |
| 227 | } |
| 228 | |
| 229 | @Override |
| 230 | public PcepType getType() { |
| 231 | return PcepType.ERROR; |
| 232 | } |
| 233 | |
| 234 | @Override |
| 235 | public PcepErrorMsg build() { |
| 236 | return new PcepErrorMsgVer1(this.errObjListWithOpen, this.errInfo); |
| 237 | } |
| 238 | |
| 239 | @Override |
| 240 | public ErrorObjListWithOpen getErrorObjListWithOpen() { |
| 241 | return this.errObjListWithOpen; |
| 242 | } |
| 243 | |
| 244 | @Override |
| 245 | public Builder setErrorObjListWithOpen(ErrorObjListWithOpen errObjListWithOpen) { |
| 246 | this.errObjListWithOpen = errObjListWithOpen; |
| 247 | return this; |
| 248 | } |
| 249 | |
| 250 | @Override |
| 251 | public PcepErrorInfo getPcepErrorInfo() { |
| 252 | return this.errInfo; |
| 253 | } |
| 254 | |
| 255 | @Override |
| 256 | public Builder setPcepErrorInfo(PcepErrorInfo errInfo) { |
| 257 | this.errInfo = errInfo; |
| 258 | return this; |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | @Override |
| 263 | public void writeTo(ChannelBuffer cb) throws PcepParseException { |
| 264 | WRITER.write(cb, this); |
| 265 | } |
| 266 | |
| 267 | public static final Writer WRITER = new Writer(); |
| 268 | |
| 269 | /** |
| 270 | * Writer class for writing PCEP error Message to channel buffer. |
| 271 | */ |
| 272 | static class Writer implements PcepMessageWriter<PcepErrorMsgVer1> { |
| 273 | @Override |
| 274 | public void write(ChannelBuffer cb, PcepErrorMsgVer1 message) throws PcepParseException { |
| 275 | int startIndex = cb.writerIndex(); |
| 276 | // first 3 bits set to version |
| 277 | cb.writeByte((byte) (PACKET_VERSION << PcepMessageVer1.SHIFT_FLAG)); |
| 278 | // message type 0xC |
| 279 | cb.writeByte(MSG_TYPE.getType()); |
| 280 | // length is length of variable message, will be updated at the end |
| 281 | // Store the position of message |
| 282 | // length in buffer |
| 283 | int msgLenIndex = cb.writerIndex(); |
| 284 | cb.writeShort(0); |
| 285 | ErrorObjListWithOpen errObjListWithOpen = message.getErrorObjListWithOpen(); |
| 286 | PcepErrorInfo errInfo = message.getPcepErrorInfo(); |
| 287 | |
| 288 | // write ( <error-obj-list> [<Open>] ) if exists. |
| 289 | // otherwise write <error> [<error-list>] |
| 290 | |
Sho SHIMIZU | 92cd34f | 2015-09-03 10:29:30 -0700 | [diff] [blame] | 291 | if ((errObjListWithOpen != null) |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 292 | && (errObjListWithOpen.isErrorObjListWithOpenPresent())) { |
| 293 | errObjListWithOpen.write(cb); |
Sho SHIMIZU | 92cd34f | 2015-09-03 10:29:30 -0700 | [diff] [blame] | 294 | } else if ((errInfo != null) && (errInfo.isErrorInfoPresent())) { |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 295 | errInfo.write(cb); |
| 296 | } else { |
| 297 | throw new PcepParseException("Empty PCEP-ERROR message."); |
| 298 | } |
| 299 | // PcepErrorMessage message length field |
| 300 | int length = cb.writerIndex() - startIndex; |
| 301 | cb.setShort(msgLenIndex, (short) length); |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | @Override |
| 306 | public PcepVersion getVersion() { |
| 307 | return PcepVersion.PCEP_1; |
| 308 | } |
| 309 | |
| 310 | @Override |
| 311 | public PcepType getType() { |
| 312 | return MSG_TYPE; |
| 313 | } |
| 314 | |
| 315 | @Override |
| 316 | public ErrorObjListWithOpen getErrorObjListWithOpen() { |
| 317 | return this.errObjListWithOpen; |
| 318 | } |
| 319 | |
| 320 | @Override |
| 321 | public void setErrorObjListWithOpen(ErrorObjListWithOpen errObjListWithOpen) { |
| 322 | this.errObjListWithOpen = errObjListWithOpen; |
| 323 | } |
| 324 | |
| 325 | @Override |
| 326 | public PcepErrorInfo getPcepErrorInfo() { |
| 327 | return this.errInfo; |
| 328 | } |
| 329 | |
| 330 | @Override |
| 331 | public void setPcepErrorInfo(PcepErrorInfo errInfo) { |
| 332 | this.errInfo = errInfo; |
| 333 | } |
| 334 | |
| 335 | /** |
| 336 | * Return list of Error types. |
| 337 | * |
| 338 | * @return error types list |
| 339 | */ |
| 340 | public LinkedList<Integer> getErrorType() { |
Sho SHIMIZU | 9b8274c | 2015-09-04 15:54:24 -0700 | [diff] [blame] | 341 | LinkedList<Integer> llErrorType = new LinkedList<>(); |
Sho SHIMIZU | 92cd34f | 2015-09-03 10:29:30 -0700 | [diff] [blame] | 342 | if ((errObjListWithOpen != null) |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 343 | && (errObjListWithOpen.isErrorObjListWithOpenPresent())) { |
| 344 | llErrorType = errObjListWithOpen.getErrorType(); |
Sho SHIMIZU | 92cd34f | 2015-09-03 10:29:30 -0700 | [diff] [blame] | 345 | } else if ((errInfo != null) && (errInfo.isErrorInfoPresent())) { |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 346 | llErrorType = errInfo.getErrorType(); |
| 347 | } |
| 348 | |
| 349 | return llErrorType; |
| 350 | } |
| 351 | |
| 352 | /** |
| 353 | * Return list of Error values. |
| 354 | * |
| 355 | * @return error value list |
| 356 | */ |
| 357 | public LinkedList<Integer> getErrorValue() { |
Sho SHIMIZU | 9b8274c | 2015-09-04 15:54:24 -0700 | [diff] [blame] | 358 | LinkedList<Integer> llErrorValue = new LinkedList<>(); |
Sho SHIMIZU | 92cd34f | 2015-09-03 10:29:30 -0700 | [diff] [blame] | 359 | if ((errObjListWithOpen != null) |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 360 | && (errObjListWithOpen.isErrorObjListWithOpenPresent())) { |
| 361 | llErrorValue = errObjListWithOpen.getErrorValue(); |
Sho SHIMIZU | 92cd34f | 2015-09-03 10:29:30 -0700 | [diff] [blame] | 362 | } else if ((errInfo != null) && (errInfo.isErrorInfoPresent())) { |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 363 | llErrorValue = errInfo.getErrorValue(); |
| 364 | } |
| 365 | |
| 366 | return llErrorValue; |
| 367 | } |
| 368 | |
| 369 | @Override |
| 370 | public String toString() { |
| 371 | ToStringHelper toStrHelper = MoreObjects.toStringHelper(getClass()); |
| 372 | |
Sho SHIMIZU | 92cd34f | 2015-09-03 10:29:30 -0700 | [diff] [blame] | 373 | if ((errObjListWithOpen != null) |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 374 | && (errObjListWithOpen.isErrorObjListWithOpenPresent())) { |
| 375 | toStrHelper.add("ErrorObjectListWithOpen", errObjListWithOpen); |
| 376 | } |
Sho SHIMIZU | 92cd34f | 2015-09-03 10:29:30 -0700 | [diff] [blame] | 377 | if ((errInfo != null) && (errInfo.isErrorInfoPresent())) { |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 378 | toStrHelper.add("ErrorInfo", errInfo); |
| 379 | } |
| 380 | |
| 381 | return toStrHelper.toString(); |
| 382 | } |
| 383 | } |