Mahesh Poojary S | 5afd06c | 2015-08-21 14:51:04 +0530 | [diff] [blame] | 1 | /* |
Brian O'Connor | a09fe5b | 2017-08-03 21:12:30 -0700 | [diff] [blame] | 2 | * Copyright 2015-present Open Networking Foundation |
Mahesh Poojary S | 5afd06c | 2015-08-21 14:51:04 +0530 | [diff] [blame] | 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.onosproject.pcepio.protocol.ver1; |
| 18 | |
| 19 | import org.jboss.netty.buffer.ChannelBuffer; |
| 20 | import org.onosproject.pcepio.exceptions.PcepParseException; |
| 21 | import org.onosproject.pcepio.protocol.PcepMessageReader; |
| 22 | import org.onosproject.pcepio.protocol.PcepMessageWriter; |
| 23 | import org.onosproject.pcepio.protocol.PcepOpenMsg; |
| 24 | import org.onosproject.pcepio.protocol.PcepOpenObject; |
| 25 | import org.onosproject.pcepio.protocol.PcepType; |
| 26 | import org.onosproject.pcepio.protocol.PcepVersion; |
| 27 | import org.onosproject.pcepio.types.PcepErrorDetailInfo; |
| 28 | import org.slf4j.Logger; |
| 29 | import org.slf4j.LoggerFactory; |
| 30 | |
| 31 | import com.google.common.base.MoreObjects; |
| 32 | |
Phanendra Manda | 51fb9c2 | 2015-09-01 16:17:41 +0530 | [diff] [blame] | 33 | /** |
| 34 | * Provides PCEP open message. |
| 35 | */ |
Mahesh Poojary S | 5afd06c | 2015-08-21 14:51:04 +0530 | [diff] [blame] | 36 | public class PcepOpenMsgVer1 implements PcepOpenMsg { |
| 37 | |
| 38 | /* |
| 39 | * <Open Message>::= <Common Header> <OPEN> |
| 40 | 0 1 2 3 |
| 41 | 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 |
| 42 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 43 | | Ver | Flags | Message-Type | Message-Length | |
| 44 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 45 | | Object-Class | OT |Res|P|I| Object Length (bytes) | |
| 46 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 47 | | Ver | Flags | Keepalive | DeadTimer | SID | |
| 48 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 49 | | | |
| 50 | // Optional TLVs // |
| 51 | | | |
| 52 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 53 | */ |
| 54 | |
Ray Milkey | 9c9cde4 | 2018-01-12 14:22:06 -0800 | [diff] [blame] | 55 | private static final Logger log = LoggerFactory.getLogger(PcepOpenMsgVer1.class); |
Mahesh Poojary S | 5afd06c | 2015-08-21 14:51:04 +0530 | [diff] [blame] | 56 | |
| 57 | public static final byte PACKET_VERSION = 1; |
| 58 | public static final int PACKET_MINIMUM_LENGTH = 12; |
| 59 | public static final PcepType MSG_TYPE = PcepType.OPEN; |
| 60 | private PcepOpenObject pcepOpenObj; |
| 61 | |
| 62 | public static final PcepOpenMsgVer1.Reader READER = new Reader(); |
| 63 | |
| 64 | /** |
| 65 | * Constructor to initialize PcepOpenObject. |
| 66 | * |
| 67 | * @param pcepOpenObj PCEP-OPEN-OBJECT |
| 68 | */ |
| 69 | public PcepOpenMsgVer1(PcepOpenObject pcepOpenObj) { |
| 70 | this.pcepOpenObj = pcepOpenObj; |
| 71 | } |
| 72 | |
| 73 | @Override |
| 74 | public PcepOpenObject getPcepOpenObject() { |
| 75 | return this.pcepOpenObj; |
| 76 | } |
| 77 | |
| 78 | @Override |
| 79 | public void setPcepOpenObject(PcepOpenObject pcepOpenObj) { |
| 80 | this.pcepOpenObj = pcepOpenObj; |
| 81 | } |
| 82 | |
| 83 | @Override |
| 84 | public PcepVersion getVersion() { |
| 85 | return PcepVersion.PCEP_1; |
| 86 | } |
| 87 | |
| 88 | @Override |
| 89 | public PcepType getType() { |
| 90 | return MSG_TYPE; |
| 91 | } |
| 92 | |
Phanendra Manda | 51fb9c2 | 2015-09-01 16:17:41 +0530 | [diff] [blame] | 93 | /** |
| 94 | * Reader class for reading PCEP open message from channel buffer. |
| 95 | */ |
Mahesh Poojary S | 5afd06c | 2015-08-21 14:51:04 +0530 | [diff] [blame] | 96 | public static class Reader implements PcepMessageReader<PcepOpenMsg> { |
| 97 | |
| 98 | @Override |
| 99 | public PcepOpenMsg readFrom(ChannelBuffer cb) throws PcepParseException { |
| 100 | |
| 101 | if (cb.readableBytes() < PACKET_MINIMUM_LENGTH) { |
| 102 | throw new PcepParseException("Packet size is less than the minimum length."); |
| 103 | } |
| 104 | |
| 105 | byte version = cb.readByte(); |
| 106 | version = (byte) (version >> PcepMessageVer1.SHIFT_FLAG); |
| 107 | if (version != PACKET_VERSION) { |
| 108 | log.error("[readFrom] Invalid version: " + version); |
| 109 | throw new PcepParseException(PcepErrorDetailInfo.ERROR_TYPE_1, PcepErrorDetailInfo.ERROR_VALUE_1); |
| 110 | } |
| 111 | // fixed value property type == 1 |
| 112 | byte type = cb.readByte(); |
| 113 | |
| 114 | if (type != MSG_TYPE.getType()) { |
| 115 | log.error("[readFrom] Unexpected type: " + type); |
| 116 | throw new PcepParseException(PcepErrorDetailInfo.ERROR_TYPE_1, PcepErrorDetailInfo.ERROR_VALUE_1); |
| 117 | } |
| 118 | int length = cb.readShort(); |
| 119 | if (length < PACKET_MINIMUM_LENGTH) { |
| 120 | throw new PcepParseException( |
| 121 | "Wrong length: Expected to be >= " + PACKET_MINIMUM_LENGTH + ", was: " + length); |
| 122 | } |
| 123 | return new PcepOpenMsgVer1(PcepOpenObjectVer1.read(cb)); |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | /** |
| 128 | * Builder class for PCEP open message. |
| 129 | */ |
| 130 | static class Builder implements PcepOpenMsg.Builder { |
| 131 | |
| 132 | private PcepOpenObject pcepOpenObj; |
| 133 | |
| 134 | @Override |
| 135 | public PcepOpenMsg build() throws PcepParseException { |
| 136 | if (!(pcepOpenObj instanceof PcepOpenObjectVer1)) { |
| 137 | throw new NullPointerException("PcepOpenObject is null."); |
| 138 | } |
| 139 | return new PcepOpenMsgVer1(pcepOpenObj); |
| 140 | } |
| 141 | |
| 142 | @Override |
| 143 | public PcepVersion getVersion() { |
| 144 | return PcepVersion.PCEP_1; |
| 145 | } |
| 146 | |
| 147 | @Override |
| 148 | public PcepType getType() { |
| 149 | return PcepType.OPEN; |
| 150 | } |
| 151 | |
| 152 | @Override |
| 153 | public PcepOpenObject getPcepOpenObj() { |
| 154 | return this.pcepOpenObj; |
| 155 | } |
| 156 | |
| 157 | @Override |
| 158 | public Builder setPcepOpenObj(PcepOpenObject obj) { |
| 159 | this.pcepOpenObj = obj; |
| 160 | return this; |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | @Override |
| 165 | public void writeTo(ChannelBuffer cb) throws PcepParseException { |
| 166 | WRITER.write(cb, this); |
| 167 | } |
| 168 | |
| 169 | public static final Writer WRITER = new Writer(); |
| 170 | |
Phanendra Manda | 51fb9c2 | 2015-09-01 16:17:41 +0530 | [diff] [blame] | 171 | /** |
| 172 | * Writer class for writing PCEP opne message to channel buffer. |
| 173 | */ |
Mahesh Poojary S | 5afd06c | 2015-08-21 14:51:04 +0530 | [diff] [blame] | 174 | public static class Writer implements PcepMessageWriter<PcepOpenMsgVer1> { |
| 175 | |
| 176 | @Override |
| 177 | public void write(ChannelBuffer cb, PcepOpenMsgVer1 message) throws PcepParseException { |
| 178 | int startIndex = cb.writerIndex(); |
| 179 | // first 3 bits set to version |
| 180 | cb.writeByte((byte) (PACKET_VERSION << PcepMessageVer1.SHIFT_FLAG)); |
| 181 | // message type |
| 182 | cb.writeByte(MSG_TYPE.getType()); |
| 183 | // length is length of variable message, will be updated at the end |
| 184 | // Store the position of message |
| 185 | // length in buffer |
| 186 | |
| 187 | int msgLenIndex = cb.writerIndex(); |
| 188 | cb.writeShort(0); |
| 189 | |
| 190 | message.getPcepOpenObject().write(cb); |
| 191 | |
| 192 | // update message length field |
| 193 | int iLength = cb.writerIndex() - startIndex; |
| 194 | cb.setShort(msgLenIndex, (short) iLength); |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | @Override |
| 199 | public String toString() { |
Sho SHIMIZU | 7cdbcf7 | 2015-09-03 14:43:05 -0700 | [diff] [blame] | 200 | return MoreObjects.toStringHelper(getClass()) |
| 201 | .add("OpenObject", pcepOpenObj) |
| 202 | .toString(); |
Mahesh Poojary S | 5afd06c | 2015-08-21 14:51:04 +0530 | [diff] [blame] | 203 | } |
| 204 | } |