Beispiel #1
0
  /**
   * Parse TE List from the channel buffer.
   *
   * @param cb of type channel buffer
   * @throws PcepParseException if mandatory fields are missing
   */
  public void parseTEList(ChannelBuffer cb) throws PcepParseException {
    byte yObjClass;
    byte yObjType;

    llTEObjList = new LinkedList<PcepTEObject>();

    // caller should verify for TE object
    if (cb.readableBytes() < OBJECT_HEADER_LENGTH) {
      log.debug("Unable to find TE Object");
      return;
    }

    cb.markReaderIndex();
    PcepObjectHeader tempObjHeader = PcepObjectHeader.read(cb);
    cb.resetReaderIndex();
    yObjClass = tempObjHeader.getObjClass();
    yObjType = tempObjHeader.getObjType();
    PcepTEObject teObj;
    while ((yObjClass == PcepTEObjectVer1.TE_OBJ_CLASS)
        && ((yObjType == PcepTEObjectVer1.TE_OBJ_TYPE_NODE_VALUE)
            || (yObjType == PcepTEObjectVer1.TE_OBJ_TYPE_LINK_VALUE))) {
      teObj = PcepTEObjectVer1.read(cb);
      llTEObjList.add(teObj);

      if (cb.readableBytes() > OBJECT_HEADER_LENGTH) {
        cb.markReaderIndex();
        tempObjHeader = PcepObjectHeader.read(cb);
        cb.resetReaderIndex();
        yObjClass = tempObjHeader.getObjClass();
        yObjType = tempObjHeader.getObjType();
      } else {
        break;
      }
    }
  }
Beispiel #2
0
  /**
   * Reads the byte stream of PcepError from channel buffer.
   *
   * @param cb of type channel buffer
   * @return PcepError error part of PCEP-ERROR
   * @throws PcepParseException if mandatory fields are missing
   */
  public static PcepErrorVer1 read(ChannelBuffer cb) throws PcepParseException {
    if (cb.readableBytes() < OBJECT_HEADER_LENGTH) {
      throw new PcepParseException("Unknown Object");
    }

    PcepErrorVer1 pcepError = new PcepErrorVer1();
    // check whether any PCEP Error Info is present
    cb.markReaderIndex();
    PcepObjectHeader tempObjHeader = PcepObjectHeader.read(cb);
    cb.resetReaderIndex();
    byte yObjClass = tempObjHeader.getObjClass();

    // If RPlist present then store it.RPList and TEList are optional
    if (yObjClass == PcepRPObjectVer1.RP_OBJ_CLASS) {
      log.debug("RP_LIST");
      pcepError.parseRPList(cb);
      yObjClass = checkNextObject(cb);
    } else if (yObjClass == PcepTEObjectVer1.TE_OBJ_CLASS) {
      log.debug("TE_LIST");
      pcepError.parseTEList(cb);
      yObjClass = checkNextObject(cb);
    }

    if (yObjClass == PcepErrorObjectVer1.ERROR_OBJ_CLASS) {
      log.debug("PCEP-ERROR obj list");
      pcepError.parseErrObjList(cb);
      yObjClass = checkNextObject(cb);
    }

    return pcepError;
  }
Beispiel #3
0
 /**
  * Checks Next Object.
  *
  * @param cb of type channel buffer.
  * @return object type class.
  */
 private static byte checkNextObject(ChannelBuffer cb) {
   if (cb.readableBytes() < OBJECT_HEADER_LENGTH) {
     return 0;
   }
   cb.markReaderIndex();
   PcepObjectHeader tempObjHeader = PcepObjectHeader.read(cb);
   cb.resetReaderIndex();
   return tempObjHeader.getObjClass();
 }
Beispiel #4
0
  /**
   * parseErrObjList from the channel buffer.
   *
   * @param cb of type channel buffer
   * @throws PcepParseException if mandatory fields are missing
   */
  public void parseErrObjList(ChannelBuffer cb) throws PcepParseException {
    byte yObjClass;
    byte yObjType;
    boolean bIsErrorObjFound = false;

    llErrObjList = new LinkedList<PcepErrorObject>();

    // caller should verify for RP object
    if (cb.readableBytes() < OBJECT_HEADER_LENGTH) {
      throw new PcepParseException("Unable to find PCEP-ERROR Object");
    }

    cb.markReaderIndex();
    PcepObjectHeader tempObjHeader = PcepObjectHeader.read(cb);
    cb.resetReaderIndex();
    yObjClass = tempObjHeader.getObjClass();
    yObjType = tempObjHeader.getObjType();
    PcepErrorObject errorObject;
    while ((yObjClass == PcepErrorObjectVer1.ERROR_OBJ_CLASS)
        && (yObjType == PcepErrorObjectVer1.ERROR_OBJ_TYPE)) {
      errorObject = PcepErrorObjectVer1.read(cb);
      llErrObjList.add(errorObject);
      bIsErrorObjFound = true;

      if (cb.readableBytes() > OBJECT_HEADER_LENGTH) {
        cb.markReaderIndex();
        tempObjHeader = PcepObjectHeader.read(cb);
        cb.resetReaderIndex();
        yObjClass = tempObjHeader.getObjClass();
        yObjType = tempObjHeader.getObjType();
      } else {
        break;
      }
    }

    if (!bIsErrorObjFound) {
      throw new PcepParseException("At least one PCEP-ERROR Object should be present.");
    }
  }
Beispiel #5
0
  /**
   * Parse channel buffer and returns object of PcepLspObject.
   *
   * @param cb of type channel buffer
   * @return object of PcepLspObject
   * @throws PcepParseException when lsp object is not present in channel buffer
   */
  public static PcepLspObject read(ChannelBuffer cb) throws PcepParseException {

    PcepObjectHeader lspObjHeader;
    int iPlspId;
    // 3-bits
    byte yOFlag;
    boolean bAFlag;
    boolean bRFlag;
    boolean bSFlag;
    boolean bDFlag;
    boolean bCFlag;

    // Optional TLV
    LinkedList<PcepValueType> llOptionalTlv = new LinkedList<>();

    lspObjHeader = PcepObjectHeader.read(cb);

    if (lspObjHeader.getObjClass() != PcepLspObjectVer1.LSP_OBJ_CLASS) {
      throw new PcepParseException(
          PcepErrorDetailInfo.ERROR_TYPE_6, PcepErrorDetailInfo.ERROR_VALUE_8);
    }
    // take only LspObject buffer.
    ChannelBuffer tempCb = cb.readBytes(lspObjHeader.getObjLen() - OBJECT_HEADER_LENGTH);

    Integer iTemp = tempCb.readInt();
    iPlspId = (iTemp & PLSPID_TEMP_SHIFT_VALUE) >> PLSPID_SHIFT_VALUE;
    bCFlag = ((iTemp & CFLAG_TEMP_SHIFT_VALUE) >> CFLAG_SHIFT_VALUE) > 0;
    Integer iX = (iTemp & OFLAG_TEMP_SHIFT_VALUE) >> OFLAG_SHIFT_VALUE;
    yOFlag = iX.byteValue();
    iX = (iTemp & AFLAG_TEMP_SHIFT_VALUE) >> AFLAG_SHIFT_VALUE;
    bAFlag = iX > 0;
    iX = (iTemp & RFLAG_TEMP_SHIFT_VALUE) >> RFLAG_SHIFT_VALUE;
    bRFlag = iX > 0;
    iX = (iTemp & SFLAG_TEMP_SHIFT_VALUE) >> SFLAG_SHIFT_VALUE;
    bSFlag = iX > 0;
    iX = iTemp & DFLAG_TEMP_SHIFT_VALUE;
    bDFlag = iX > 0;

    // parse optional TLV
    llOptionalTlv = parseOptionalTlv(tempCb);

    return new PcepLspObjectVer1(
        lspObjHeader, iPlspId, yOFlag, bAFlag, bRFlag, bSFlag, bDFlag, bCFlag, llOptionalTlv);
  }