| /* |
| * Copyright 2015 Open Networking Laboratory |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.onosproject.pcepio.protocol.ver1; |
| |
| import java.util.LinkedList; |
| import java.util.ListIterator; |
| |
| import org.jboss.netty.buffer.ChannelBuffer; |
| import org.onosproject.pcepio.exceptions.PcepParseException; |
| import org.onosproject.pcepio.protocol.PcepLabelRange; |
| import org.onosproject.pcepio.protocol.PcepLabelRangeObject; |
| import org.onosproject.pcepio.protocol.PcepSrpObject; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.base.MoreObjects; |
| |
| /** |
| * Provides PCEP Label Range. |
| */ |
| public class PcepLabelRangeVer1 implements PcepLabelRange { |
| |
| protected static final Logger log = LoggerFactory.getLogger(PcepLabelRangeVer1.class); |
| |
| /* |
| <label-range> ::= <SRP> |
| <labelrange-list> |
| Where |
| <labelrange-list>::=<LABEL-RANGE>[<labelrange-list>] |
| */ |
| |
| // PCEP SRP Object |
| private PcepSrpObject srpObject; |
| //<labelrange-list> of type PcepLabelRangeObject. |
| private LinkedList<PcepLabelRangeObject> llLabelRangeList; |
| |
| /** |
| * Default Constructor. |
| */ |
| public PcepLabelRangeVer1() { |
| srpObject = null; |
| llLabelRangeList = null; |
| } |
| |
| /** |
| * Constructor to initialize objects. |
| * |
| * @param srpObj PCEP Srp object. |
| * @param llLabelRangeList list of PcepLabelRangeObject. |
| */ |
| PcepLabelRangeVer1(PcepSrpObject srpObj, LinkedList<PcepLabelRangeObject> llLabelRangeList) { |
| this.srpObject = srpObj; |
| this.llLabelRangeList = llLabelRangeList; |
| } |
| |
| @Override |
| public PcepSrpObject getSrpObject() { |
| return srpObject; |
| } |
| |
| @Override |
| public void setSrpObject(PcepSrpObject srpObject) { |
| this.srpObject = srpObject; |
| |
| } |
| |
| @Override |
| public LinkedList<PcepLabelRangeObject> getLabelRangeList() { |
| return llLabelRangeList; |
| } |
| |
| @Override |
| public void setLabelRangeList(LinkedList<PcepLabelRangeObject> ll) { |
| this.llLabelRangeList = ll; |
| } |
| |
| /** |
| * Reads channel buffer and returns object of PcepLabelRange. |
| * |
| * @param cb of type channel buffer. |
| * @return object of PcepLabelRange |
| * @throws PcepParseException when fails to read from channel buffer |
| */ |
| public static PcepLabelRange read(ChannelBuffer cb) throws PcepParseException { |
| |
| //parse and store SRP mandatory object |
| PcepSrpObject srpObj = null; |
| srpObj = PcepSrpObjectVer1.read(cb); |
| if (srpObj == null) { |
| throw new PcepParseException("Exception while parsing srp object"); |
| } |
| |
| LinkedList<PcepLabelRangeObject> llLabelRangeList = new LinkedList<>(); |
| boolean bFoundLabelRangeObj = false; |
| while (0 < cb.readableBytes()) { |
| //parse and store <labelrange-list> |
| PcepLabelRangeObject lrObj; |
| lrObj = PcepLabelRangeObjectVer1.read(cb); |
| if (lrObj == null) { |
| throw new PcepParseException("Exception while parsing label range object"); |
| } else { |
| llLabelRangeList.add(lrObj); |
| bFoundLabelRangeObj = true; |
| } |
| } |
| |
| if (!bFoundLabelRangeObj) { |
| throw new PcepParseException("At least one LABEL-RANGE MUST be present."); |
| } |
| return new PcepLabelRangeVer1(srpObj, llLabelRangeList); |
| } |
| |
| @Override |
| public int write(ChannelBuffer cb) throws PcepParseException { |
| //write Object header |
| int objStartIndex = cb.writerIndex(); |
| |
| //write <SRP> |
| int objLenIndex = srpObject.write(cb); |
| |
| if (objLenIndex <= 0) { |
| throw new PcepParseException("bjectLength is " + objLenIndex); |
| } |
| |
| //write <labelrange-list> |
| ListIterator<PcepLabelRangeObject> listIterator = llLabelRangeList.listIterator(); |
| while (listIterator.hasNext()) { |
| listIterator.next().write(cb); |
| } |
| |
| //Update object length now |
| int length = cb.writerIndex() - objStartIndex; |
| // As per RFC the length of object should be |
| // multiples of 4 |
| int pad = length % 4; |
| if (pad != 0) { |
| pad = 4 - pad; |
| for (int i = 0; i < pad; i++) { |
| cb.writeByte((byte) 0); |
| } |
| length = length + pad; |
| } |
| cb.setShort(objLenIndex, (short) length); |
| return length; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()) |
| .add("srpObject", srpObject) |
| .add("LabelRangeList", llLabelRangeList) |
| .toString(); |
| } |
| } |