tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 1 | /** |
| 2 | * Copyright 2011, Big Switch Networks, Inc. |
| 3 | * Originally created by David Erickson, Stanford University |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| 6 | * not use this file except in compliance with the License. You may obtain |
| 7 | * a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| 13 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| 14 | * License for the specific language governing permissions and limitations |
| 15 | * under the License. |
| 16 | **/ |
| 17 | |
tom | 9c94c5b | 2014-09-17 13:14:42 -0700 | [diff] [blame^] | 18 | package org.onlab.onos.openflow.controller.driver; |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 19 | |
| 20 | import java.io.IOException; |
| 21 | import java.util.Collections; |
| 22 | import java.util.List; |
| 23 | import java.util.concurrent.atomic.AtomicInteger; |
| 24 | |
| 25 | import org.jboss.netty.channel.Channel; |
tom | 9c94c5b | 2014-09-17 13:14:42 -0700 | [diff] [blame^] | 26 | import org.onlab.onos.openflow.controller.Dpid; |
| 27 | import org.onlab.onos.openflow.controller.RoleState; |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 28 | import org.projectfloodlight.openflow.protocol.OFDescStatsReply; |
| 29 | import org.projectfloodlight.openflow.protocol.OFErrorMsg; |
| 30 | import org.projectfloodlight.openflow.protocol.OFExperimenter; |
| 31 | import org.projectfloodlight.openflow.protocol.OFFactories; |
| 32 | import org.projectfloodlight.openflow.protocol.OFFactory; |
| 33 | import org.projectfloodlight.openflow.protocol.OFFeaturesReply; |
| 34 | import org.projectfloodlight.openflow.protocol.OFMessage; |
| 35 | import org.projectfloodlight.openflow.protocol.OFPortDesc; |
| 36 | import org.projectfloodlight.openflow.protocol.OFPortDescStatsReply; |
| 37 | import org.projectfloodlight.openflow.protocol.OFRoleReply; |
| 38 | import org.projectfloodlight.openflow.protocol.OFVersion; |
| 39 | import org.slf4j.Logger; |
| 40 | import org.slf4j.LoggerFactory; |
| 41 | |
| 42 | /** |
| 43 | * An abstract representation of an OpenFlow switch. Can be extended by others |
| 44 | * to serve as a base for their vendor specific representation of a switch. |
| 45 | */ |
| 46 | public abstract class AbstractOpenFlowSwitch implements OpenFlowSwitchDriver { |
| 47 | |
| 48 | private static Logger log = |
| 49 | LoggerFactory.getLogger(AbstractOpenFlowSwitch.class); |
| 50 | |
| 51 | protected Channel channel; |
| 52 | |
| 53 | private boolean connected; |
| 54 | protected boolean startDriverHandshakeCalled = false; |
| 55 | private final Dpid dpid; |
| 56 | private OpenFlowAgent agent; |
| 57 | private final AtomicInteger xidCounter = new AtomicInteger(0); |
| 58 | |
| 59 | private OFVersion ofVersion; |
| 60 | |
| 61 | protected OFPortDescStatsReply ports; |
| 62 | |
| 63 | protected boolean tableFull; |
| 64 | |
| 65 | private RoleHandler roleMan; |
| 66 | |
| 67 | protected RoleState role; |
| 68 | |
| 69 | protected OFFeaturesReply features; |
| 70 | protected OFDescStatsReply desc; |
| 71 | |
| 72 | /** |
| 73 | * Given a dpid build this switch. |
| 74 | * @param dp the dpid |
| 75 | */ |
| 76 | protected AbstractOpenFlowSwitch(Dpid dp) { |
| 77 | this.dpid = dp; |
| 78 | } |
| 79 | |
| 80 | public AbstractOpenFlowSwitch(Dpid dpid, OFDescStatsReply desc) { |
| 81 | this.dpid = dpid; |
| 82 | this.desc = desc; |
| 83 | } |
| 84 | |
| 85 | //************************ |
| 86 | // Channel related |
| 87 | //************************ |
| 88 | |
| 89 | @Override |
| 90 | public final void disconnectSwitch() { |
| 91 | this.channel.close(); |
| 92 | } |
| 93 | |
| 94 | @Override |
| 95 | public final void sendMsg(OFMessage m) { |
| 96 | this.write(m); |
| 97 | } |
| 98 | |
| 99 | @Override |
| 100 | public final void sendMsg(List<OFMessage> msgs) { |
| 101 | this.write(msgs); |
| 102 | } |
| 103 | |
| 104 | @Override |
| 105 | public abstract void write(OFMessage msg); |
| 106 | |
| 107 | @Override |
| 108 | public abstract void write(List<OFMessage> msgs); |
| 109 | |
| 110 | @Override |
| 111 | public final boolean isConnected() { |
| 112 | return this.connected; |
| 113 | } |
| 114 | |
| 115 | @Override |
| 116 | public final void setConnected(boolean connected) { |
| 117 | this.connected = connected; |
| 118 | }; |
| 119 | |
| 120 | @Override |
| 121 | public final void setChannel(Channel channel) { |
| 122 | this.channel = channel; |
| 123 | }; |
| 124 | |
| 125 | //************************ |
| 126 | // Switch features related |
| 127 | //************************ |
| 128 | |
| 129 | @Override |
| 130 | public final long getId() { |
| 131 | return this.dpid.value(); |
| 132 | }; |
| 133 | |
| 134 | @Override |
| 135 | public final String getStringId() { |
| 136 | return this.dpid.toString(); |
| 137 | } |
| 138 | |
| 139 | @Override |
| 140 | public final void setOFVersion(OFVersion ofV) { |
| 141 | this.ofVersion = ofV; |
| 142 | } |
| 143 | |
| 144 | @Override |
| 145 | public void setTableFull(boolean full) { |
| 146 | this.tableFull = full; |
| 147 | } |
| 148 | |
| 149 | @Override |
| 150 | public void setFeaturesReply(OFFeaturesReply featuresReply) { |
| 151 | this.features = featuresReply; |
| 152 | } |
| 153 | |
| 154 | @Override |
| 155 | public abstract Boolean supportNxRole(); |
| 156 | |
| 157 | //************************ |
| 158 | // Message handling |
| 159 | //************************ |
| 160 | /** |
| 161 | * Handle the message coming from the dataplane. |
| 162 | * |
| 163 | * @param m the actual message |
| 164 | */ |
| 165 | @Override |
| 166 | public final void handleMessage(OFMessage m) { |
| 167 | this.agent.processMessage(dpid, m); |
| 168 | } |
| 169 | |
| 170 | @Override |
| 171 | public RoleState getRole() { |
| 172 | return role; |
| 173 | }; |
| 174 | |
| 175 | @Override |
| 176 | public final boolean connectSwitch() { |
| 177 | return this.agent.addConnectedSwitch(dpid, this); |
| 178 | } |
| 179 | |
| 180 | @Override |
| 181 | public final boolean activateMasterSwitch() { |
| 182 | return this.agent.addActivatedMasterSwitch(dpid, this); |
| 183 | } |
| 184 | |
| 185 | @Override |
| 186 | public final boolean activateEqualSwitch() { |
| 187 | return this.agent.addActivatedEqualSwitch(dpid, this); |
| 188 | } |
| 189 | |
| 190 | @Override |
| 191 | public final void transitionToEqualSwitch() { |
| 192 | this.agent.transitionToEqualSwitch(dpid); |
| 193 | } |
| 194 | |
| 195 | @Override |
| 196 | public final void transitionToMasterSwitch() { |
| 197 | this.agent.transitionToMasterSwitch(dpid); |
| 198 | } |
| 199 | |
| 200 | @Override |
| 201 | public final void removeConnectedSwitch() { |
| 202 | this.agent.removeConnectedSwitch(dpid); |
| 203 | } |
| 204 | |
| 205 | @Override |
| 206 | public OFFactory factory() { |
| 207 | return OFFactories.getFactory(ofVersion); |
| 208 | } |
| 209 | |
| 210 | @Override |
| 211 | public void setPortDescReply(OFPortDescStatsReply portDescReply) { |
| 212 | this.ports = portDescReply; |
| 213 | } |
| 214 | |
| 215 | @Override |
| 216 | public abstract void startDriverHandshake(); |
| 217 | |
| 218 | @Override |
| 219 | public abstract boolean isDriverHandshakeComplete(); |
| 220 | |
| 221 | @Override |
| 222 | public abstract void processDriverHandshakeMessage(OFMessage m); |
| 223 | |
| 224 | @Override |
| 225 | public void setRole(RoleState role) { |
| 226 | try { |
| 227 | log.info("Sending role {} to switch {}", role, getStringId()); |
| 228 | if (this.roleMan.sendRoleRequest(role, RoleRecvStatus.MATCHED_SET_ROLE)) { |
| 229 | this.role = role; |
| 230 | } |
| 231 | } catch (IOException e) { |
| 232 | log.error("Unable to write to switch {}.", this.dpid); |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | // Role Handling |
| 237 | |
| 238 | @Override |
| 239 | public void handleRole(OFMessage m) throws SwitchStateException { |
| 240 | RoleReplyInfo rri = roleMan.extractOFRoleReply((OFRoleReply) m); |
| 241 | RoleRecvStatus rrs = roleMan.deliverRoleReply(rri); |
| 242 | if (rrs == RoleRecvStatus.MATCHED_SET_ROLE) { |
| 243 | if (rri.getRole() == RoleState.MASTER) { |
| 244 | this.transitionToMasterSwitch(); |
| 245 | } else if (rri.getRole() == RoleState.EQUAL || |
| 246 | rri.getRole() == RoleState.MASTER) { |
| 247 | this.transitionToEqualSwitch(); |
| 248 | } |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | @Override |
| 253 | public void handleNiciraRole(OFMessage m) throws SwitchStateException { |
| 254 | RoleState r = this.roleMan.extractNiciraRoleReply((OFExperimenter) m); |
| 255 | if (r == null) { |
| 256 | // The message wasn't really a Nicira role reply. We just |
| 257 | // dispatch it to the OFMessage listeners in this case. |
| 258 | this.handleMessage(m); |
| 259 | } |
| 260 | |
| 261 | RoleRecvStatus rrs = this.roleMan.deliverRoleReply( |
| 262 | new RoleReplyInfo(r, null, m.getXid())); |
| 263 | if (rrs == RoleRecvStatus.MATCHED_SET_ROLE) { |
| 264 | if (r == RoleState.MASTER) { |
| 265 | this.transitionToMasterSwitch(); |
| 266 | } else if (r == RoleState.EQUAL || |
| 267 | r == RoleState.SLAVE) { |
| 268 | this.transitionToEqualSwitch(); |
| 269 | } |
| 270 | } |
| 271 | } |
| 272 | |
| 273 | @Override |
| 274 | public boolean handleRoleError(OFErrorMsg error) { |
| 275 | try { |
| 276 | return RoleRecvStatus.OTHER_EXPECTATION != this.roleMan.deliverError(error); |
| 277 | } catch (SwitchStateException e) { |
| 278 | this.disconnectSwitch(); |
| 279 | } |
| 280 | return true; |
| 281 | } |
| 282 | |
| 283 | @Override |
| 284 | public void reassertRole() { |
| 285 | if (this.getRole() == RoleState.MASTER) { |
| 286 | this.setRole(RoleState.MASTER); |
| 287 | } |
| 288 | } |
| 289 | |
| 290 | @Override |
| 291 | public final void setAgent(OpenFlowAgent ag) { |
| 292 | if (this.agent == null) { |
| 293 | this.agent = ag; |
| 294 | } |
| 295 | } |
| 296 | |
| 297 | @Override |
| 298 | public final void setRoleHandler(RoleHandler roleHandler) { |
| 299 | if (this.roleMan == null) { |
| 300 | this.roleMan = roleHandler; |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | @Override |
| 305 | public void setSwitchDescription(OFDescStatsReply d) { |
| 306 | this.desc = d; |
| 307 | } |
| 308 | |
| 309 | @Override |
| 310 | public int getNextTransactionId() { |
| 311 | return this.xidCounter.getAndIncrement(); |
| 312 | } |
| 313 | |
| 314 | @Override |
| 315 | public List<OFPortDesc> getPorts() { |
| 316 | return Collections.unmodifiableList(ports.getEntries()); |
| 317 | } |
| 318 | |
| 319 | @Override |
| 320 | public String manfacturerDescription() { |
| 321 | return this.desc.getMfrDesc(); |
| 322 | } |
| 323 | |
| 324 | |
| 325 | @Override |
| 326 | public String datapathDescription() { |
| 327 | return this.desc.getDpDesc(); |
| 328 | } |
| 329 | |
| 330 | |
| 331 | @Override |
| 332 | public String hardwareDescription() { |
| 333 | return this.desc.getHwDesc(); |
| 334 | } |
| 335 | |
| 336 | @Override |
| 337 | public String softwareDescription() { |
| 338 | return this.desc.getSwDesc(); |
| 339 | } |
| 340 | |
| 341 | @Override |
| 342 | public String serialNumber() { |
| 343 | return this.desc.getSerialNum(); |
| 344 | } |
| 345 | |
| 346 | } |