| /* |
| * 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.PcepMessageReader; |
| import org.onosproject.pcepio.protocol.PcepMessageWriter; |
| import org.onosproject.pcepio.protocol.PcepTEObject; |
| import org.onosproject.pcepio.protocol.PcepTEReportMsg; |
| import org.onosproject.pcepio.protocol.PcepType; |
| import org.onosproject.pcepio.protocol.PcepVersion; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.base.MoreObjects; |
| |
| /** |
| * Provides PCEP TE Report Message. |
| */ |
| class PcepTEReportMsgVer1 implements PcepTEReportMsg { |
| |
| /* |
| * Ref : draft-dhodylee-pce-pcep-te-data-extn-02, section 8.1 |
| |
| <TERpt Message> ::= <Common Header> |
| <te-report-list> |
| Where: |
| <te-report-list> ::= <TE>[<te-report-list>] |
| */ |
| |
| private static final Logger log = LoggerFactory.getLogger(PcepTEReportMsgVer1.class); |
| //PACKET_MINIMUM_LENGTH = CommonHeaderLen(4)+TEObjMinLen(12) |
| public static final int PACKET_MINIMUM_LENGTH = 16; |
| public static final PcepType MSG_TYPE = PcepType.TE_REPORT; |
| // <te-report-list> |
| private LinkedList<PcepTEObject> teReportList; |
| |
| public static final PcepTEReportMsgVer1.Reader READER = new Reader(); |
| |
| /** |
| * Reader class for reading PCPE te report message form channel buffer. |
| */ |
| static class Reader implements PcepMessageReader<PcepTEReportMsg> { |
| |
| LinkedList<PcepTEObject> teReportList; |
| |
| @Override |
| public PcepTEReportMsg readFrom(ChannelBuffer cb) throws PcepParseException { |
| |
| if (cb.readableBytes() < PACKET_MINIMUM_LENGTH) { |
| return null; |
| } |
| |
| teReportList = new LinkedList<>(); |
| |
| byte version = cb.readByte(); |
| version = (byte) (version >> PcepMessageVer1.SHIFT_FLAG); |
| if (version != PcepMessageVer1.PACKET_VERSION) { |
| throw new PcepParseException("Wrong version. Expected=PcepVersion.PCEP_1(1), got=" + version); |
| } |
| |
| byte type = cb.readByte(); |
| if (type != MSG_TYPE.getType()) { |
| throw new PcepParseException("Wrong type. Expected=PcepType.TE_REPORT(14), got=" + type); |
| } |
| |
| short length = cb.readShort(); |
| if (length < PACKET_MINIMUM_LENGTH) { |
| throw new PcepParseException( |
| "Wrong length. Expected to be >= " + PACKET_MINIMUM_LENGTH + ", is: " + length); |
| } |
| |
| // Parse state report list |
| parseTEReportList(cb); |
| |
| return new PcepTEReportMsgVer1(teReportList); |
| } |
| |
| /** |
| * Parse te-report-list. |
| * |
| * @param cb input Channel Buffer |
| * @throws PcepParseException when fails to parse TE Report list. |
| */ |
| public void parseTEReportList(ChannelBuffer cb) throws PcepParseException { |
| // <te-report-list> ::= <TE>[<te-report-list>] |
| |
| while (0 < cb.readableBytes()) { |
| //store TE objectS |
| if (!teReportList.add(PcepTEObjectVer1.read(cb))) { |
| throw new PcepParseException("Failed to add TE object to TE report list"); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Constructor to initialize TE Report List. |
| * |
| * @param teReportList list of PCEP TE Object |
| */ |
| PcepTEReportMsgVer1(LinkedList<PcepTEObject> teReportList) { |
| this.teReportList = teReportList; |
| } |
| |
| /** |
| * Builder class for PCEP te report message. |
| */ |
| static class Builder implements PcepTEReportMsg.Builder { |
| // PCEP TE Report message fields |
| LinkedList<PcepTEObject> teReportList; |
| |
| @Override |
| public PcepVersion getVersion() { |
| return PcepVersion.PCEP_1; |
| } |
| |
| @Override |
| public PcepType getType() { |
| return PcepType.TE_REPORT; |
| } |
| |
| @Override |
| public PcepTEReportMsg build() { |
| return new PcepTEReportMsgVer1(this.teReportList); |
| } |
| |
| @Override |
| public LinkedList<PcepTEObject> getTEReportList() { |
| return this.teReportList; |
| } |
| |
| @Override |
| public Builder setTEReportList(LinkedList<PcepTEObject> ll) { |
| this.teReportList = ll; |
| return this; |
| } |
| } |
| |
| @Override |
| public void writeTo(ChannelBuffer bb) throws PcepParseException { |
| WRITER.write(bb, this); |
| } |
| |
| static final Writer WRITER = new Writer(); |
| |
| /** |
| * Writer class for writing PCEP te report message to channel buffer. |
| */ |
| static class Writer implements PcepMessageWriter<PcepTEReportMsgVer1> { |
| |
| @Override |
| public void write(ChannelBuffer bb, PcepTEReportMsgVer1 message) throws PcepParseException { |
| |
| int startIndex = bb.writerIndex(); |
| |
| // first 3 bits set to version |
| bb.writeByte((byte) (PcepMessageVer1.PACKET_VERSION << PcepMessageVer1.SHIFT_FLAG)); |
| |
| // message type |
| bb.writeByte(MSG_TYPE.getType()); |
| |
| // Length of the message will be updated at the end |
| // First write with 0s |
| int msgLenIndex = bb.writerIndex(); |
| bb.writeShort((short) 0); |
| |
| ListIterator<PcepTEObject> listIterator = message.teReportList.listIterator(); |
| |
| while (listIterator.hasNext()) { |
| PcepTEObject teObj = listIterator.next(); |
| teObj.write(bb); |
| } |
| |
| // update message length field |
| int length = bb.writerIndex() - startIndex; |
| bb.setShort(msgLenIndex, (short) length); |
| } |
| } |
| |
| @Override |
| public PcepVersion getVersion() { |
| return PcepVersion.PCEP_1; |
| } |
| |
| @Override |
| public PcepType getType() { |
| return MSG_TYPE; |
| } |
| |
| @Override |
| public LinkedList<PcepTEObject> getTEReportList() { |
| return this.teReportList; |
| } |
| |
| @Override |
| public void setTEReportList(LinkedList<PcepTEObject> ll) { |
| this.teReportList = ll; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()) |
| .add("TeReportList", teReportList) |
| .toString(); |
| } |
| } |