| /* |
| * 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.types; |
| |
| 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.PcepVersion; |
| |
| import com.google.common.base.MoreObjects; |
| |
| /** |
| * Provides Pcep Rsvp User Error Spec. |
| */ |
| public class PcepRsvpUserErrorSpec implements PcepRsvpErrorSpec { |
| |
| /* |
| RSVP error spec object header. |
| 0 1 2 3 |
| +-------------+-------------+-------------+-------------+ |
| | Length (bytes) | Class-Num | C-Type | |
| +-------------+-------------+-------------+-------------+ |
| | | |
| // (Object contents) // |
| | | |
| +-------------+-------------+-------------+-------------+ |
| |
| Ref : USER_ERROR_SPEC @ RFC5284. |
| USER_ERROR_SPEC object: Class = 194, C-Type = 1 |
| |
| 0 1 2 3 |
| 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| +---------------+---------------+---------------+---------------+ |
| | Enterprise Number | |
| +---------------+---------------+---------------+---------------+ |
| | Sub Org | Err Desc Len | User Error Value | |
| +---------------+---------------+---------------+---------------+ |
| | | |
| ~ Error Description ~ |
| | | |
| +---------------+---------------+---------------+---------------+ |
| | | |
| ~ User-Defined Subobjects ~ |
| | | |
| +---------------+---------------+---------------+---------------+ |
| */ |
| |
| public static final byte CLASS_NUM = (byte) 0xc2; |
| public static final byte CLASS_TYPE = 0x01; |
| |
| private PcepRsvpSpecObjHeader objHeader; |
| private int enterpriseNum; |
| private byte subOrg; |
| private byte errDescLen; |
| private short userErrorValue; |
| private byte[] errDesc; |
| private LinkedList<PcepValueType> llRsvpUserSpecSubObj; |
| |
| /** |
| * Default constructor. |
| * |
| * @param objHeader pcep rsvp spec object header |
| * @param enterpriseNum enterprise number |
| * @param subOrg organization identifier value |
| * @param errDescLen error description length |
| * @param userErrorValue user error value |
| * @param errDesc error description |
| * @param llRsvpUserSpecSubObj list of subobjects |
| */ |
| public PcepRsvpUserErrorSpec(PcepRsvpSpecObjHeader objHeader, int enterpriseNum, byte subOrg, byte errDescLen, |
| short userErrorValue, byte[] errDesc, LinkedList<PcepValueType> llRsvpUserSpecSubObj) { |
| this.objHeader = objHeader; |
| this.enterpriseNum = enterpriseNum; |
| this.subOrg = subOrg; |
| this.errDescLen = errDescLen; |
| this.userErrorValue = userErrorValue; |
| this.errDesc = errDesc; |
| this.llRsvpUserSpecSubObj = llRsvpUserSpecSubObj; |
| } |
| |
| @Override |
| public int write(ChannelBuffer cb) { |
| int objLenIndex = objHeader.write(cb); |
| cb.writeInt(enterpriseNum); |
| cb.writeByte(subOrg); |
| cb.writeByte(errDescLen); |
| cb.writeShort(userErrorValue); |
| cb.writeBytes(errDesc); |
| |
| if (llRsvpUserSpecSubObj != null) { |
| |
| ListIterator<PcepValueType> listIterator = llRsvpUserSpecSubObj.listIterator(); |
| |
| while (listIterator.hasNext()) { |
| PcepValueType tlv = listIterator.next(); |
| if (tlv == null) { |
| continue; |
| } |
| tlv.write(cb); |
| // need to take care of padding |
| int pad = tlv.getLength() % 4; |
| if (0 != pad) { |
| pad = 4 - pad; |
| for (int i = 0; i < pad; ++i) { |
| cb.writeByte((byte) 0); |
| } |
| } |
| } |
| } |
| short objLen = (short) (cb.writerIndex() - objLenIndex); |
| cb.setShort(objLenIndex, objLen); |
| return objLen; |
| } |
| |
| /** |
| * Reads the channel buffer and returns object of PcepRsvpErrorSpec. |
| * |
| * @param cb of type channel buffer |
| * @return object of PcepRsvpErrorSpec |
| * @throws PcepParseException when expected object is not received |
| */ |
| public static PcepRsvpErrorSpec read(ChannelBuffer cb) throws PcepParseException { |
| PcepRsvpSpecObjHeader objHeader; |
| int enterpriseNum; |
| byte subOrg; |
| byte errDescLen; |
| short userErrorValue; |
| byte[] errDesc; |
| LinkedList<PcepValueType> llRsvpUserSpecSubObj = null; |
| |
| objHeader = PcepRsvpSpecObjHeader.read(cb); |
| |
| if (objHeader.getObjClassNum() != CLASS_NUM || objHeader.getObjClassType() != CLASS_TYPE) { |
| throw new PcepParseException("Expected PcepRsvpUserErrorSpec object."); |
| } |
| enterpriseNum = cb.readInt(); |
| subOrg = cb.readByte(); |
| errDescLen = cb.readByte(); |
| userErrorValue = cb.readShort(); |
| errDesc = new byte[errDescLen]; |
| cb.readBytes(errDesc, 0, errDescLen); |
| |
| llRsvpUserSpecSubObj = parseErrSpecSubObj(cb); |
| |
| return new PcepRsvpUserErrorSpec(objHeader, enterpriseNum, subOrg, errDescLen, userErrorValue, errDesc, |
| llRsvpUserSpecSubObj); |
| } |
| |
| private static LinkedList<PcepValueType> parseErrSpecSubObj(ChannelBuffer cb) throws PcepParseException { |
| LinkedList<PcepValueType> llRsvpUserSpecSubObj = new LinkedList<>(); |
| while (0 < cb.readableBytes()) { |
| PcepValueType tlv = null; |
| short hType = cb.readShort(); |
| int iValue = 0; |
| //short hLength = cb.readShort(); |
| switch (hType) { |
| case AutonomousSystemTlv.TYPE: |
| iValue = cb.readInt(); |
| tlv = new AutonomousSystemTlv(iValue); |
| break; |
| default: |
| throw new PcepParseException("Unsupported Sub TLV type :" + hType); |
| } |
| llRsvpUserSpecSubObj.add(tlv); |
| } |
| return llRsvpUserSpecSubObj; |
| } |
| |
| @Override |
| public PcepVersion getVersion() { |
| return PcepVersion.PCEP_1; |
| } |
| |
| @Override |
| public short getType() { |
| return StatefulRsvpErrorSpecTlv.TYPE; |
| } |
| |
| @Override |
| public short getLength() { |
| return objHeader.getObjLen(); |
| } |
| |
| @Override |
| public byte getClassNum() { |
| return CLASS_NUM; |
| } |
| |
| @Override |
| public byte getClassType() { |
| return CLASS_TYPE; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()) |
| .add("enterpriseNumber", enterpriseNum) |
| .add("subOrganization", subOrg) |
| .add("errDescLength", errDescLen) |
| .add("userErrorValue", userErrorValue) |
| .add("errDesc", errDesc) |
| .add("RsvpUserSpecSubObject", llRsvpUserSpecSubObj) |
| .toString(); |
| } |
| } |