Thomas Vachuska | 24c849c | 2014-10-27 09:53:05 -0700 | [diff] [blame] | 1 | /* |
Brian O'Connor | a09fe5b | 2017-08-03 21:12:30 -0700 | [diff] [blame] | 2 | * Copyright 2016-present Open Networking Foundation |
Thomas Vachuska | 24c849c | 2014-10-27 09:53:05 -0700 | [diff] [blame] | 3 | * |
Thomas Vachuska | 4f1a60c | 2014-10-28 13:39:07 -0700 | [diff] [blame] | 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 |
Thomas Vachuska | 24c849c | 2014-10-27 09:53:05 -0700 | [diff] [blame] | 7 | * |
Thomas Vachuska | 4f1a60c | 2014-10-28 13:39:07 -0700 | [diff] [blame] | 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. |
Thomas Vachuska | 24c849c | 2014-10-27 09:53:05 -0700 | [diff] [blame] | 15 | */ |
Aaron Kruglikov | 1b72738 | 2016-02-09 16:17:47 -0800 | [diff] [blame] | 16 | package org.onosproject.store.cluster.messaging.impl; |
Madan Jampani | ab6d311 | 2014-10-02 16:30:14 -0700 | [diff] [blame] | 17 | |
Aaron Kruglikov | 1b72738 | 2016-02-09 16:17:47 -0800 | [diff] [blame] | 18 | import com.google.common.base.Charsets; |
Madan Jampani | a9e70a6 | 2016-03-02 16:28:18 -0800 | [diff] [blame] | 19 | |
Madan Jampani | 86ed055 | 2014-10-03 16:45:42 -0700 | [diff] [blame] | 20 | import io.netty.buffer.ByteBuf; |
| 21 | import io.netty.channel.ChannelHandlerContext; |
| 22 | import io.netty.handler.codec.ReplayingDecoder; |
Madan Jampani | a9e70a6 | 2016-03-02 16:28:18 -0800 | [diff] [blame] | 23 | |
Madan Jampani | 2e5f87b | 2015-02-22 10:37:15 -0800 | [diff] [blame] | 24 | import org.onlab.packet.IpAddress; |
| 25 | import org.onlab.packet.IpAddress.Version; |
Madan Jampani | 0583387 | 2016-07-12 23:01:39 -0700 | [diff] [blame] | 26 | import org.onosproject.core.HybridLogicalTime; |
Madan Jampani | c26eede | 2015-04-16 11:42:16 -0700 | [diff] [blame] | 27 | import org.onosproject.store.cluster.messaging.Endpoint; |
Madan Jampani | 29e5dfd | 2014-10-07 17:26:25 -0700 | [diff] [blame] | 28 | import org.slf4j.Logger; |
| 29 | import org.slf4j.LoggerFactory; |
| 30 | |
Aaron Kruglikov | 1b72738 | 2016-02-09 16:17:47 -0800 | [diff] [blame] | 31 | import java.util.List; |
Madan Jampani | 49115e9 | 2015-03-14 10:43:33 -0700 | [diff] [blame] | 32 | |
Ray Milkey | 9f87e51 | 2016-01-05 10:00:22 -0800 | [diff] [blame] | 33 | import static com.google.common.base.Preconditions.checkState; |
Ray Milkey | 9f87e51 | 2016-01-05 10:00:22 -0800 | [diff] [blame] | 34 | |
Madan Jampani | 938aa43 | 2014-10-04 17:37:23 -0700 | [diff] [blame] | 35 | /** |
| 36 | * Decoder for inbound messages. |
| 37 | */ |
| 38 | public class MessageDecoder extends ReplayingDecoder<DecoderState> { |
Madan Jampani | ab6d311 | 2014-10-02 16:30:14 -0700 | [diff] [blame] | 39 | |
Madan Jampani | 29e5dfd | 2014-10-07 17:26:25 -0700 | [diff] [blame] | 40 | private final Logger log = LoggerFactory.getLogger(getClass()); |
| 41 | |
Madan Jampani | 2e5f87b | 2015-02-22 10:37:15 -0800 | [diff] [blame] | 42 | private Version ipVersion; |
| 43 | private IpAddress senderIp; |
| 44 | private int senderPort; |
Jordan Halterman | e3813a9 | 2017-07-29 14:10:31 -0700 | [diff] [blame] | 45 | |
| 46 | private InternalMessage.Type type; |
| 47 | private int preamble; |
| 48 | private long logicalTime; |
| 49 | private long logicalCounter; |
| 50 | private long messageId; |
Madan Jampani | 938aa43 | 2014-10-04 17:37:23 -0700 | [diff] [blame] | 51 | private int contentLength; |
Jordan Halterman | e3813a9 | 2017-07-29 14:10:31 -0700 | [diff] [blame] | 52 | private byte[] content; |
| 53 | private int subjectLength; |
| 54 | private String subject; |
| 55 | private InternalReply.Status status; |
Madan Jampani | 938aa43 | 2014-10-04 17:37:23 -0700 | [diff] [blame] | 56 | |
Madan Jampani | b825aeb | 2016-04-01 15:18:25 -0700 | [diff] [blame] | 57 | public MessageDecoder() { |
Jordan Halterman | e3813a9 | 2017-07-29 14:10:31 -0700 | [diff] [blame] | 58 | super(DecoderState.READ_SENDER_IP_VERSION); |
Madan Jampani | ab6d311 | 2014-10-02 16:30:14 -0700 | [diff] [blame] | 59 | } |
| 60 | |
| 61 | @Override |
Aaron Kruglikov | 1b72738 | 2016-02-09 16:17:47 -0800 | [diff] [blame] | 62 | @SuppressWarnings("squid:S128") // suppress switch fall through warning |
Madan Jampani | 86ed055 | 2014-10-03 16:45:42 -0700 | [diff] [blame] | 63 | protected void decode( |
| 64 | ChannelHandlerContext context, |
| 65 | ByteBuf buffer, |
| 66 | List<Object> out) throws Exception { |
Madan Jampani | ab6d311 | 2014-10-02 16:30:14 -0700 | [diff] [blame] | 67 | |
Yuta HIGUCHI | 5e8ceb4 | 2014-11-04 17:22:26 -0800 | [diff] [blame] | 68 | switch (state()) { |
Jordan Halterman | e3813a9 | 2017-07-29 14:10:31 -0700 | [diff] [blame] | 69 | case READ_SENDER_IP_VERSION: |
| 70 | ipVersion = buffer.readByte() == 0x0 ? Version.INET : Version.INET6; |
| 71 | checkpoint(DecoderState.READ_SENDER_IP); |
Ray Milkey | 7dac7da | 2017-08-01 16:56:05 -0700 | [diff] [blame] | 72 | // FALLTHROUGH |
Jordan Halterman | e3813a9 | 2017-07-29 14:10:31 -0700 | [diff] [blame] | 73 | case READ_SENDER_IP: |
| 74 | byte[] octets = new byte[IpAddress.byteLength(ipVersion)]; |
| 75 | buffer.readBytes(octets); |
| 76 | senderIp = IpAddress.valueOf(ipVersion, octets); |
| 77 | checkpoint(DecoderState.READ_SENDER_PORT); |
Ray Milkey | 7dac7da | 2017-08-01 16:56:05 -0700 | [diff] [blame] | 78 | // FALLTHROUGH |
Jordan Halterman | e3813a9 | 2017-07-29 14:10:31 -0700 | [diff] [blame] | 79 | case READ_SENDER_PORT: |
| 80 | senderPort = buffer.readInt(); |
| 81 | checkpoint(DecoderState.READ_TYPE); |
Ray Milkey | 7dac7da | 2017-08-01 16:56:05 -0700 | [diff] [blame] | 82 | // FALLTHROUGH |
Jordan Halterman | e3813a9 | 2017-07-29 14:10:31 -0700 | [diff] [blame] | 83 | case READ_TYPE: |
| 84 | type = InternalMessage.Type.forId(buffer.readByte()); |
| 85 | checkpoint(DecoderState.READ_PREAMBLE); |
Ray Milkey | 7dac7da | 2017-08-01 16:56:05 -0700 | [diff] [blame] | 86 | // FALLTHROUGH |
Jordan Halterman | e3813a9 | 2017-07-29 14:10:31 -0700 | [diff] [blame] | 87 | case READ_PREAMBLE: |
| 88 | preamble = buffer.readInt(); |
| 89 | checkpoint(DecoderState.READ_LOGICAL_TIME); |
Ray Milkey | 7dac7da | 2017-08-01 16:56:05 -0700 | [diff] [blame] | 90 | // FALLTHROUGH |
Jordan Halterman | e3813a9 | 2017-07-29 14:10:31 -0700 | [diff] [blame] | 91 | case READ_LOGICAL_TIME: |
| 92 | logicalTime = buffer.readLong(); |
| 93 | checkpoint(DecoderState.READ_LOGICAL_COUNTER); |
Ray Milkey | 7dac7da | 2017-08-01 16:56:05 -0700 | [diff] [blame] | 94 | // FALLTHROUGH |
Jordan Halterman | e3813a9 | 2017-07-29 14:10:31 -0700 | [diff] [blame] | 95 | case READ_LOGICAL_COUNTER: |
| 96 | logicalCounter = buffer.readLong(); |
| 97 | checkpoint(DecoderState.READ_MESSAGE_ID); |
Ray Milkey | 7dac7da | 2017-08-01 16:56:05 -0700 | [diff] [blame] | 98 | // FALLTHROUGH |
Jordan Halterman | e3813a9 | 2017-07-29 14:10:31 -0700 | [diff] [blame] | 99 | case READ_MESSAGE_ID: |
| 100 | messageId = buffer.readLong(); |
| 101 | checkpoint(DecoderState.READ_CONTENT_LENGTH); |
Ray Milkey | 7dac7da | 2017-08-01 16:56:05 -0700 | [diff] [blame] | 102 | // FALLTHROUGH |
Jordan Halterman | e3813a9 | 2017-07-29 14:10:31 -0700 | [diff] [blame] | 103 | case READ_CONTENT_LENGTH: |
| 104 | contentLength = buffer.readInt(); |
| 105 | checkpoint(DecoderState.READ_CONTENT); |
Ray Milkey | 7dac7da | 2017-08-01 16:56:05 -0700 | [diff] [blame] | 106 | // FALLTHROUGH |
Jordan Halterman | e3813a9 | 2017-07-29 14:10:31 -0700 | [diff] [blame] | 107 | case READ_CONTENT: |
| 108 | if (contentLength > 0) { |
| 109 | //TODO Perform a sanity check on the size before allocating |
| 110 | content = new byte[contentLength]; |
| 111 | buffer.readBytes(content); |
| 112 | } else { |
| 113 | content = new byte[0]; |
| 114 | } |
| 115 | |
| 116 | switch (type) { |
| 117 | case REQUEST: |
| 118 | checkpoint(DecoderState.READ_SUBJECT_LENGTH); |
| 119 | break; |
| 120 | case REPLY: |
| 121 | checkpoint(DecoderState.READ_STATUS); |
| 122 | break; |
| 123 | default: |
| 124 | checkState(false, "Must not be here"); |
| 125 | } |
| 126 | break; |
| 127 | default: |
| 128 | break; |
| 129 | } |
| 130 | |
| 131 | switch (type) { |
| 132 | case REQUEST: |
| 133 | switch (state()) { |
| 134 | case READ_SUBJECT_LENGTH: |
| 135 | subjectLength = buffer.readShort(); |
| 136 | checkpoint(DecoderState.READ_SUBJECT); |
Ray Milkey | 7dac7da | 2017-08-01 16:56:05 -0700 | [diff] [blame] | 137 | // FALLTHROUGH |
Jordan Halterman | e3813a9 | 2017-07-29 14:10:31 -0700 | [diff] [blame] | 138 | case READ_SUBJECT: |
| 139 | byte[] messageTypeBytes = new byte[subjectLength]; |
| 140 | buffer.readBytes(messageTypeBytes); |
| 141 | subject = new String(messageTypeBytes, Charsets.UTF_8); |
| 142 | InternalRequest message = new InternalRequest(preamble, |
| 143 | new HybridLogicalTime(logicalTime, logicalCounter), |
| 144 | messageId, |
| 145 | new Endpoint(senderIp, senderPort), |
| 146 | subject, |
| 147 | content); |
| 148 | out.add(message); |
| 149 | checkpoint(DecoderState.READ_TYPE); |
| 150 | break; |
| 151 | default: |
| 152 | break; |
| 153 | } |
| 154 | break; |
| 155 | case REPLY: |
| 156 | switch (state()) { |
| 157 | case READ_STATUS: |
| 158 | status = InternalReply.Status.forId(buffer.readByte()); |
| 159 | InternalReply message = new InternalReply(preamble, |
| 160 | new HybridLogicalTime(logicalTime, logicalCounter), |
| 161 | messageId, |
| 162 | content, |
| 163 | status); |
| 164 | out.add(message); |
| 165 | checkpoint(DecoderState.READ_TYPE); |
| 166 | break; |
| 167 | default: |
| 168 | break; |
| 169 | } |
| 170 | break; |
| 171 | default: |
| 172 | checkState(false, "Must not be here"); |
Madan Jampani | 938aa43 | 2014-10-04 17:37:23 -0700 | [diff] [blame] | 173 | } |
Madan Jampani | ab6d311 | 2014-10-02 16:30:14 -0700 | [diff] [blame] | 174 | } |
Madan Jampani | 29e5dfd | 2014-10-07 17:26:25 -0700 | [diff] [blame] | 175 | |
| 176 | @Override |
| 177 | public void exceptionCaught(ChannelHandlerContext context, Throwable cause) { |
| 178 | log.error("Exception inside channel handling pipeline.", cause); |
| 179 | context.close(); |
| 180 | } |
Jordan Halterman | e3813a9 | 2017-07-29 14:10:31 -0700 | [diff] [blame] | 181 | } |