bharat saraswal | f7364db | 2015-08-11 13:39:31 +0530 | [diff] [blame] | 1 | /*
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| 2 | * Copyright 2015 Open Networking Laboratory
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| 3 | *
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License");
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| 5 | * you may not use this file except in compliance with the License.
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| 6 | * You may obtain a copy of the License at
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| 7 | *
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0
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| 9 | *
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| 10 | * Unless required by applicable law or agreed to in writing, software
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS,
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 13 | * See the License for the specific language governing permissions and
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| 14 | * limitations under the License.
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| 15 | */
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| 16 | package org.onosproject.pcepio.types;
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| 17 |
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| 18 | import java.util.LinkedList;
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| 19 | import java.util.ListIterator;
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| 20 |
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| 21 | import org.jboss.netty.buffer.ChannelBuffer;
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| 22 | import org.onosproject.pcepio.exceptions.PcepParseException;
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| 23 | import org.onosproject.pcepio.protocol.PcepVersion;
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| 24 |
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| 25 | import com.google.common.base.MoreObjects;
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| 26 |
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| 27 | public class PcepRsvpUserErrorSpec implements PcepRsvpErrorSpec {
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| 28 |
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| 29 | /*
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| 30 | RSVP error spec object header.
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| 31 | 0 1 2 3
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| 32 | +-------------+-------------+-------------+-------------+
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| 33 | | Length (bytes) | Class-Num | C-Type |
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| 34 | +-------------+-------------+-------------+-------------+
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| 35 | | |
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| 36 | // (Object contents) //
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| 37 | | |
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| 38 | +-------------+-------------+-------------+-------------+
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| 39 |
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| 40 | Ref : USER_ERROR_SPEC @ RFC5284.
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| 41 | USER_ERROR_SPEC object: Class = 194, C-Type = 1
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| 42 |
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| 43 | 0 1 2 3
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| 44 | 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
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| 45 | +---------------+---------------+---------------+---------------+
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| 46 | | Enterprise Number |
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| 47 | +---------------+---------------+---------------+---------------+
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| 48 | | Sub Org | Err Desc Len | User Error Value |
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| 49 | +---------------+---------------+---------------+---------------+
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| 50 | | |
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| 51 | ~ Error Description ~
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| 52 | | |
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| 53 | +---------------+---------------+---------------+---------------+
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| 54 | | |
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| 55 | ~ User-Defined Subobjects ~
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| 56 | | |
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| 57 | +---------------+---------------+---------------+---------------+
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| 58 | */
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| 59 |
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| 60 | public static final byte CLASS_NUM = (byte) 0xc2;
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| 61 | public static final byte CLASS_TYPE = 0x01;
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| 62 |
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| 63 | private PcepRsvpSpecObjHeader objHeader;
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| 64 | private int enterpriseNum;
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| 65 | private byte subOrg;
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| 66 | private byte errDescLen;
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| 67 | private short userErrorValue;
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| 68 | private byte[] errDesc;
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| 69 | private LinkedList<PcepValueType> llRsvpUserSpecSubObj;
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| 70 |
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| 71 | /**
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| 72 | * Default constructor.
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| 73 | *
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| 74 | * @param objHeader pcep rsvp spec object header
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| 75 | * @param enterpriseNum enterprise number
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| 76 | * @param subOrg organization identifier value
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| 77 | * @param errDescLen error description length
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| 78 | * @param userErrorValue user error value
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| 79 | * @param errDesc error description
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| 80 | * @param llRsvpUserSpecSubObj list of subobjects
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| 81 | */
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| 82 | public PcepRsvpUserErrorSpec(PcepRsvpSpecObjHeader objHeader, int enterpriseNum, byte subOrg, byte errDescLen,
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| 83 | short userErrorValue, byte[] errDesc, LinkedList<PcepValueType> llRsvpUserSpecSubObj) {
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| 84 | this.objHeader = objHeader;
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| 85 | this.enterpriseNum = enterpriseNum;
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| 86 | this.subOrg = subOrg;
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| 87 | this.errDescLen = errDescLen;
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| 88 | this.userErrorValue = userErrorValue;
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| 89 | this.errDesc = errDesc;
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| 90 | this.llRsvpUserSpecSubObj = llRsvpUserSpecSubObj;
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| 91 | }
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| 92 |
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| 93 | @Override
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| 94 | public int write(ChannelBuffer cb) {
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| 95 | int objLenIndex = objHeader.write(cb);
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| 96 | cb.writeInt(enterpriseNum);
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| 97 | cb.writeByte(subOrg);
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| 98 | cb.writeByte(errDescLen);
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| 99 | cb.writeShort(userErrorValue);
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| 100 | cb.writeBytes(errDesc);
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| 101 |
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| 102 | if (null != llRsvpUserSpecSubObj) {
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| 103 |
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| 104 | ListIterator<PcepValueType> listIterator = llRsvpUserSpecSubObj.listIterator();
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| 105 |
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| 106 | while (listIterator.hasNext()) {
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| 107 | PcepValueType tlv = listIterator.next();
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| 108 | if (null == tlv) {
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| 109 | continue;
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| 110 | }
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| 111 | tlv.write(cb);
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| 112 | // need to take care of padding
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| 113 | int pad = tlv.getLength() % 4;
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| 114 | if (0 != pad) {
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| 115 | pad = 4 - pad;
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| 116 | for (int i = 0; i < pad; ++i) {
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| 117 | cb.writeByte((byte) 0);
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| 118 | }
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| 119 | }
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| 120 | }
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| 121 | }
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| 122 | short objLen = (short) (cb.writerIndex() - objLenIndex);
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| 123 | cb.setShort(objLenIndex, objLen);
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| 124 | return objLen;
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| 125 | }
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| 126 |
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| 127 | /**
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| 128 | * Reads the channel buffer and returns object of PcepRsvpErrorSpec.
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| 129 | *
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| 130 | * @param cb of type channel buffer
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| 131 | * @return object of PcepRsvpErrorSpec
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| 132 | * @throws PcepParseException when expected object is not received
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| 133 | */
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| 134 | public static PcepRsvpErrorSpec read(ChannelBuffer cb) throws PcepParseException {
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| 135 | PcepRsvpSpecObjHeader objHeader;
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| 136 | int enterpriseNum;
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| 137 | byte subOrg;
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| 138 | byte errDescLen;
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| 139 | short userErrorValue;
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| 140 | byte[] errDesc;
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| 141 | LinkedList<PcepValueType> llRsvpUserSpecSubObj = null;
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| 142 |
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| 143 | objHeader = PcepRsvpSpecObjHeader.read(cb);
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| 144 |
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| 145 | if (CLASS_NUM != objHeader.getObjClassNum() || CLASS_TYPE != objHeader.getObjClassType()) {
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| 146 | throw new PcepParseException("Expected PcepRsvpUserErrorSpec object.");
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| 147 | }
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| 148 | enterpriseNum = cb.readInt();
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| 149 | subOrg = cb.readByte();
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| 150 | errDescLen = cb.readByte();
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| 151 | userErrorValue = cb.readShort();
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| 152 | errDesc = new byte[errDescLen];
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| 153 | cb.readBytes(errDesc, 0, errDescLen);
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| 154 |
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| 155 | llRsvpUserSpecSubObj = parseErrSpecSubObj(cb);
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| 156 |
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| 157 | return new PcepRsvpUserErrorSpec(objHeader, enterpriseNum, subOrg, errDescLen, userErrorValue, errDesc,
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| 158 | llRsvpUserSpecSubObj);
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| 159 | }
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| 160 |
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| 161 | private static LinkedList<PcepValueType> parseErrSpecSubObj(ChannelBuffer cb) throws PcepParseException {
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| 162 | LinkedList<PcepValueType> llRsvpUserSpecSubObj = new LinkedList<PcepValueType>();
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| 163 | while (0 < cb.readableBytes()) {
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| 164 | PcepValueType tlv = null;
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| 165 | short hType = cb.readShort();
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| 166 | int iValue = 0;
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| 167 | //short hLength = cb.readShort();
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| 168 | switch (hType) {
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| 169 | case AutonomousSystemTlv.TYPE:
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| 170 | iValue = cb.readInt();
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| 171 | tlv = new AutonomousSystemTlv(iValue);
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| 172 | break;
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| 173 | default:
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| 174 | throw new PcepParseException("Unsupported Sub TLV type :" + hType);
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| 175 | }
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| 176 | llRsvpUserSpecSubObj.add(tlv);
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| 177 | }
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| 178 | return llRsvpUserSpecSubObj;
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| 179 | }
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| 180 |
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| 181 | @Override
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| 182 | public PcepVersion getVersion() {
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| 183 | return PcepVersion.PCEP_1;
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| 184 | }
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| 185 |
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| 186 | @Override
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| 187 | public short getType() {
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| 188 | return StatefulRsvpErrorSpecTlv.TYPE;
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| 189 | }
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| 190 |
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| 191 | @Override
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| 192 | public short getLength() {
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| 193 | return objHeader.getObjLen();
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| 194 | }
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| 195 |
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| 196 | @Override
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| 197 | public byte getClassNum() {
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| 198 | return CLASS_NUM;
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| 199 | }
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| 200 |
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| 201 | @Override
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| 202 | public byte getClassType() {
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| 203 | return CLASS_TYPE;
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| 204 | }
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| 205 |
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| 206 | @Override
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bharat saraswal | f7364db | 2015-08-11 13:39:31 +0530 | [diff] [blame] | 207 | public String toString() {
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| 208 | return MoreObjects.toStringHelper(getClass())
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bharat saraswal | e180630 | 2015-08-21 12:16:46 +0530 | [diff] [blame^] | 209 | .add("enterpriseNumber:", enterpriseNum)
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| 210 | .add("subOrganization:", subOrg)
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| 211 | .add("errDescLength:", errDescLen)
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| 212 | .add("userErrorValue:", userErrorValue)
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| 213 | .add("errDesc:", errDesc)
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| 214 | .add("RsvpUserSpecSubObject:", llRsvpUserSpecSubObj)
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bharat saraswal | f7364db | 2015-08-11 13:39:31 +0530 | [diff] [blame] | 215 | .toString();
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| 216 | }
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| 217 | }
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