Thomas Vachuska | 781d18b | 2014-10-27 10:31:25 -0700 | [diff] [blame] | 1 | /* |
Ray Milkey | 34c9590 | 2015-04-15 09:47:53 -0700 | [diff] [blame] | 2 | * Copyright 2014-2015 Open Networking Laboratory |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -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 |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -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 | 781d18b | 2014-10-27 10:31:25 -0700 | [diff] [blame] | 15 | */ |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 16 | |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 17 | package org.onosproject.openflow.controller.driver; |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 18 | |
| 19 | import java.io.IOException; |
Ray Milkey | e53f171 | 2015-01-16 09:17:16 -0800 | [diff] [blame] | 20 | import java.net.InetSocketAddress; |
| 21 | import java.net.SocketAddress; |
Srikanth Vavilapalli | f5b234a | 2015-04-21 13:04:13 -0700 | [diff] [blame^] | 22 | import java.util.ArrayList; |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 23 | import java.util.List; |
Thomas Vachuska | f15511b | 2015-03-24 12:17:57 -0700 | [diff] [blame] | 24 | import java.util.concurrent.RejectedExecutionException; |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 25 | import java.util.concurrent.atomic.AtomicInteger; |
Srikanth Vavilapalli | f5b234a | 2015-04-21 13:04:13 -0700 | [diff] [blame^] | 26 | import java.util.stream.Collectors; |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 27 | |
| 28 | import org.jboss.netty.channel.Channel; |
Ray Milkey | e53f171 | 2015-01-16 09:17:16 -0800 | [diff] [blame] | 29 | import org.onlab.packet.IpAddress; |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 30 | import org.onosproject.openflow.controller.Dpid; |
| 31 | import org.onosproject.openflow.controller.RoleState; |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 32 | import org.projectfloodlight.openflow.protocol.OFDescStatsReply; |
| 33 | import org.projectfloodlight.openflow.protocol.OFErrorMsg; |
| 34 | import org.projectfloodlight.openflow.protocol.OFExperimenter; |
| 35 | import org.projectfloodlight.openflow.protocol.OFFactories; |
| 36 | import org.projectfloodlight.openflow.protocol.OFFactory; |
| 37 | import org.projectfloodlight.openflow.protocol.OFFeaturesReply; |
| 38 | import org.projectfloodlight.openflow.protocol.OFMessage; |
| 39 | import org.projectfloodlight.openflow.protocol.OFPortDesc; |
| 40 | import org.projectfloodlight.openflow.protocol.OFPortDescStatsReply; |
Thomas Vachuska | 3927446 | 2014-12-02 13:23:50 -0800 | [diff] [blame] | 41 | import org.projectfloodlight.openflow.protocol.OFPortStatus; |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 42 | import org.projectfloodlight.openflow.protocol.OFRoleReply; |
| 43 | import org.projectfloodlight.openflow.protocol.OFVersion; |
| 44 | import org.slf4j.Logger; |
| 45 | import org.slf4j.LoggerFactory; |
| 46 | |
| 47 | /** |
| 48 | * An abstract representation of an OpenFlow switch. Can be extended by others |
| 49 | * to serve as a base for their vendor specific representation of a switch. |
| 50 | */ |
| 51 | public abstract class AbstractOpenFlowSwitch implements OpenFlowSwitchDriver { |
| 52 | |
Yuta HIGUCHI | f5416d8 | 2014-10-24 21:17:40 -0700 | [diff] [blame] | 53 | protected final Logger log = LoggerFactory.getLogger(getClass()); |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 54 | |
Thomas Vachuska | f15511b | 2015-03-24 12:17:57 -0700 | [diff] [blame] | 55 | private static final String SHUTDOWN_MSG = "Worker has already been shutdown"; |
| 56 | |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 57 | protected Channel channel; |
Ray Milkey | e53f171 | 2015-01-16 09:17:16 -0800 | [diff] [blame] | 58 | protected String channelId; |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 59 | |
| 60 | private boolean connected; |
| 61 | protected boolean startDriverHandshakeCalled = false; |
| 62 | private final Dpid dpid; |
| 63 | private OpenFlowAgent agent; |
| 64 | private final AtomicInteger xidCounter = new AtomicInteger(0); |
| 65 | |
| 66 | private OFVersion ofVersion; |
| 67 | |
Srikanth Vavilapalli | f5b234a | 2015-04-21 13:04:13 -0700 | [diff] [blame^] | 68 | protected List<OFPortDescStatsReply> ports = new ArrayList<>(); |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 69 | |
| 70 | protected boolean tableFull; |
| 71 | |
| 72 | private RoleHandler roleMan; |
| 73 | |
| 74 | protected RoleState role; |
| 75 | |
| 76 | protected OFFeaturesReply features; |
| 77 | protected OFDescStatsReply desc; |
| 78 | |
| 79 | /** |
| 80 | * Given a dpid build this switch. |
| 81 | * @param dp the dpid |
| 82 | */ |
| 83 | protected AbstractOpenFlowSwitch(Dpid dp) { |
| 84 | this.dpid = dp; |
| 85 | } |
| 86 | |
| 87 | public AbstractOpenFlowSwitch(Dpid dpid, OFDescStatsReply desc) { |
| 88 | this.dpid = dpid; |
| 89 | this.desc = desc; |
| 90 | } |
| 91 | |
| 92 | //************************ |
| 93 | // Channel related |
| 94 | //************************ |
| 95 | |
| 96 | @Override |
| 97 | public final void disconnectSwitch() { |
| 98 | this.channel.close(); |
| 99 | } |
| 100 | |
| 101 | @Override |
| 102 | public final void sendMsg(OFMessage m) { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 103 | if (role == RoleState.MASTER) { |
Thomas Vachuska | f15511b | 2015-03-24 12:17:57 -0700 | [diff] [blame] | 104 | try { |
| 105 | this.write(m); |
| 106 | } catch (RejectedExecutionException e) { |
Thomas Vachuska | 152f9fd | 2015-04-02 16:28:13 -0700 | [diff] [blame] | 107 | log.warn(e.getMessage()); |
Thomas Vachuska | f15511b | 2015-03-24 12:17:57 -0700 | [diff] [blame] | 108 | if (!e.getMessage().contains(SHUTDOWN_MSG)) { |
| 109 | throw e; |
| 110 | } |
| 111 | } |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 112 | } |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | @Override |
| 116 | public final void sendMsg(List<OFMessage> msgs) { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 117 | if (role == RoleState.MASTER) { |
Thomas Vachuska | f15511b | 2015-03-24 12:17:57 -0700 | [diff] [blame] | 118 | try { |
| 119 | this.write(msgs); |
| 120 | } catch (RejectedExecutionException e) { |
Thomas Vachuska | 152f9fd | 2015-04-02 16:28:13 -0700 | [diff] [blame] | 121 | log.warn(e.getMessage()); |
Thomas Vachuska | f15511b | 2015-03-24 12:17:57 -0700 | [diff] [blame] | 122 | if (!e.getMessage().contains(SHUTDOWN_MSG)) { |
| 123 | throw e; |
| 124 | } |
| 125 | } |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 126 | } |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | @Override |
| 130 | public abstract void write(OFMessage msg); |
| 131 | |
| 132 | @Override |
| 133 | public abstract void write(List<OFMessage> msgs); |
| 134 | |
| 135 | @Override |
| 136 | public final boolean isConnected() { |
| 137 | return this.connected; |
| 138 | } |
| 139 | |
| 140 | @Override |
| 141 | public final void setConnected(boolean connected) { |
| 142 | this.connected = connected; |
| 143 | }; |
| 144 | |
| 145 | @Override |
| 146 | public final void setChannel(Channel channel) { |
| 147 | this.channel = channel; |
Ray Milkey | e53f171 | 2015-01-16 09:17:16 -0800 | [diff] [blame] | 148 | final SocketAddress address = channel.getRemoteAddress(); |
| 149 | if (address instanceof InetSocketAddress) { |
| 150 | final InetSocketAddress inetAddress = (InetSocketAddress) address; |
| 151 | final IpAddress ipAddress = IpAddress.valueOf(inetAddress.getAddress()); |
Pavlin Radoslavov | 87dd930 | 2015-03-10 13:53:24 -0700 | [diff] [blame] | 152 | if (ipAddress.isIp4()) { |
Ray Milkey | e53f171 | 2015-01-16 09:17:16 -0800 | [diff] [blame] | 153 | channelId = ipAddress.toString() + ':' + inetAddress.getPort(); |
| 154 | } else { |
| 155 | channelId = '[' + ipAddress.toString() + "]:" + inetAddress.getPort(); |
| 156 | } |
| 157 | } |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 158 | }; |
| 159 | |
Ray Milkey | e53f171 | 2015-01-16 09:17:16 -0800 | [diff] [blame] | 160 | @Override |
| 161 | public String channelId() { |
| 162 | return channelId; |
| 163 | } |
| 164 | |
| 165 | |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 166 | //************************ |
| 167 | // Switch features related |
| 168 | //************************ |
| 169 | |
| 170 | @Override |
| 171 | public final long getId() { |
| 172 | return this.dpid.value(); |
| 173 | }; |
| 174 | |
| 175 | @Override |
| 176 | public final String getStringId() { |
| 177 | return this.dpid.toString(); |
| 178 | } |
| 179 | |
| 180 | @Override |
| 181 | public final void setOFVersion(OFVersion ofV) { |
| 182 | this.ofVersion = ofV; |
| 183 | } |
| 184 | |
| 185 | @Override |
| 186 | public void setTableFull(boolean full) { |
| 187 | this.tableFull = full; |
| 188 | } |
| 189 | |
| 190 | @Override |
| 191 | public void setFeaturesReply(OFFeaturesReply featuresReply) { |
| 192 | this.features = featuresReply; |
| 193 | } |
| 194 | |
| 195 | @Override |
| 196 | public abstract Boolean supportNxRole(); |
| 197 | |
| 198 | //************************ |
| 199 | // Message handling |
| 200 | //************************ |
| 201 | /** |
| 202 | * Handle the message coming from the dataplane. |
| 203 | * |
| 204 | * @param m the actual message |
| 205 | */ |
| 206 | @Override |
| 207 | public final void handleMessage(OFMessage m) { |
Thomas Vachuska | 3927446 | 2014-12-02 13:23:50 -0800 | [diff] [blame] | 208 | if (this.role == RoleState.MASTER || m instanceof OFPortStatus) { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 209 | this.agent.processMessage(dpid, m); |
| 210 | } |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 211 | } |
| 212 | |
| 213 | @Override |
| 214 | public RoleState getRole() { |
| 215 | return role; |
| 216 | }; |
| 217 | |
| 218 | @Override |
| 219 | public final boolean connectSwitch() { |
| 220 | return this.agent.addConnectedSwitch(dpid, this); |
| 221 | } |
| 222 | |
| 223 | @Override |
| 224 | public final boolean activateMasterSwitch() { |
| 225 | return this.agent.addActivatedMasterSwitch(dpid, this); |
| 226 | } |
| 227 | |
| 228 | @Override |
| 229 | public final boolean activateEqualSwitch() { |
| 230 | return this.agent.addActivatedEqualSwitch(dpid, this); |
| 231 | } |
| 232 | |
| 233 | @Override |
| 234 | public final void transitionToEqualSwitch() { |
| 235 | this.agent.transitionToEqualSwitch(dpid); |
| 236 | } |
| 237 | |
| 238 | @Override |
| 239 | public final void transitionToMasterSwitch() { |
| 240 | this.agent.transitionToMasterSwitch(dpid); |
| 241 | } |
| 242 | |
| 243 | @Override |
| 244 | public final void removeConnectedSwitch() { |
| 245 | this.agent.removeConnectedSwitch(dpid); |
| 246 | } |
| 247 | |
| 248 | @Override |
| 249 | public OFFactory factory() { |
| 250 | return OFFactories.getFactory(ofVersion); |
| 251 | } |
| 252 | |
| 253 | @Override |
| 254 | public void setPortDescReply(OFPortDescStatsReply portDescReply) { |
Srikanth Vavilapalli | f5b234a | 2015-04-21 13:04:13 -0700 | [diff] [blame^] | 255 | this.ports.add(portDescReply); |
| 256 | } |
| 257 | |
| 258 | @Override |
| 259 | public void setPortDescReplies(List<OFPortDescStatsReply> portDescReplies) { |
| 260 | this.ports.addAll(portDescReplies); |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 261 | } |
| 262 | |
| 263 | @Override |
Ayaka Koshibe | 3ef2b0d | 2014-10-31 13:58:27 -0700 | [diff] [blame] | 264 | public void returnRoleReply(RoleState requested, RoleState response) { |
| 265 | this.agent.returnRoleReply(dpid, requested, response); |
Ayaka Koshibe | ab91cc4 | 2014-09-25 10:20:52 -0700 | [diff] [blame] | 266 | } |
| 267 | |
| 268 | @Override |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 269 | public abstract void startDriverHandshake(); |
| 270 | |
| 271 | @Override |
| 272 | public abstract boolean isDriverHandshakeComplete(); |
| 273 | |
| 274 | @Override |
| 275 | public abstract void processDriverHandshakeMessage(OFMessage m); |
| 276 | |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 277 | |
| 278 | // Role Handling |
| 279 | |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 280 | @Override |
| 281 | public void setRole(RoleState role) { |
| 282 | try { |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 283 | if (this.roleMan.sendRoleRequest(role, RoleRecvStatus.MATCHED_SET_ROLE)) { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 284 | log.info("Sending role {} to switch {}", role, getStringId()); |
| 285 | if (role == RoleState.SLAVE || role == RoleState.EQUAL) { |
| 286 | this.role = role; |
| 287 | } |
alshabib | 7814e9f | 2014-09-30 11:52:12 -0700 | [diff] [blame] | 288 | } else { |
| 289 | this.role = role; |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 290 | } |
| 291 | } catch (IOException e) { |
| 292 | log.error("Unable to write to switch {}.", this.dpid); |
| 293 | } |
| 294 | } |
| 295 | |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 296 | @Override |
| 297 | public void reassertRole() { |
| 298 | if (this.getRole() == RoleState.MASTER) { |
| 299 | log.warn("Received permission error from switch {} while " + |
| 300 | "being master. Reasserting master role.", |
| 301 | this.getStringId()); |
| 302 | this.setRole(RoleState.MASTER); |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 307 | |
| 308 | @Override |
| 309 | public void handleRole(OFMessage m) throws SwitchStateException { |
| 310 | RoleReplyInfo rri = roleMan.extractOFRoleReply((OFRoleReply) m); |
| 311 | RoleRecvStatus rrs = roleMan.deliverRoleReply(rri); |
| 312 | if (rrs == RoleRecvStatus.MATCHED_SET_ROLE) { |
| 313 | if (rri.getRole() == RoleState.MASTER) { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 314 | this.role = rri.getRole(); |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 315 | this.transitionToMasterSwitch(); |
| 316 | } else if (rri.getRole() == RoleState.EQUAL || |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 317 | rri.getRole() == RoleState.SLAVE) { |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 318 | this.transitionToEqualSwitch(); |
| 319 | } |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 320 | } else { |
alshabib | 4785eec | 2014-12-04 16:45:45 -0800 | [diff] [blame] | 321 | log.warn("Failed to set role for {}", this.getStringId()); |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 322 | } |
| 323 | } |
| 324 | |
| 325 | @Override |
| 326 | public void handleNiciraRole(OFMessage m) throws SwitchStateException { |
| 327 | RoleState r = this.roleMan.extractNiciraRoleReply((OFExperimenter) m); |
| 328 | if (r == null) { |
| 329 | // The message wasn't really a Nicira role reply. We just |
| 330 | // dispatch it to the OFMessage listeners in this case. |
| 331 | this.handleMessage(m); |
alshabib | dfc7afb | 2014-10-21 20:13:27 -0700 | [diff] [blame] | 332 | return; |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 333 | } |
| 334 | |
| 335 | RoleRecvStatus rrs = this.roleMan.deliverRoleReply( |
| 336 | new RoleReplyInfo(r, null, m.getXid())); |
| 337 | if (rrs == RoleRecvStatus.MATCHED_SET_ROLE) { |
| 338 | if (r == RoleState.MASTER) { |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 339 | this.role = r; |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 340 | this.transitionToMasterSwitch(); |
| 341 | } else if (r == RoleState.EQUAL || |
| 342 | r == RoleState.SLAVE) { |
| 343 | this.transitionToEqualSwitch(); |
| 344 | } |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 345 | } else { |
alshabib | dfc7afb | 2014-10-21 20:13:27 -0700 | [diff] [blame] | 346 | this.disconnectSwitch(); |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 347 | } |
| 348 | } |
| 349 | |
| 350 | @Override |
| 351 | public boolean handleRoleError(OFErrorMsg error) { |
| 352 | try { |
| 353 | return RoleRecvStatus.OTHER_EXPECTATION != this.roleMan.deliverError(error); |
| 354 | } catch (SwitchStateException e) { |
| 355 | this.disconnectSwitch(); |
| 356 | } |
| 357 | return true; |
| 358 | } |
| 359 | |
alshabib | 339a3d9 | 2014-09-26 17:54:32 -0700 | [diff] [blame] | 360 | |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 361 | |
| 362 | @Override |
| 363 | public final void setAgent(OpenFlowAgent ag) { |
| 364 | if (this.agent == null) { |
| 365 | this.agent = ag; |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | @Override |
| 370 | public final void setRoleHandler(RoleHandler roleHandler) { |
| 371 | if (this.roleMan == null) { |
| 372 | this.roleMan = roleHandler; |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | @Override |
| 377 | public void setSwitchDescription(OFDescStatsReply d) { |
| 378 | this.desc = d; |
| 379 | } |
| 380 | |
| 381 | @Override |
| 382 | public int getNextTransactionId() { |
| 383 | return this.xidCounter.getAndIncrement(); |
| 384 | } |
| 385 | |
| 386 | @Override |
| 387 | public List<OFPortDesc> getPorts() { |
Srikanth Vavilapalli | f5b234a | 2015-04-21 13:04:13 -0700 | [diff] [blame^] | 388 | return this.ports.stream() |
| 389 | .flatMap((portReply) -> (portReply.getEntries().stream())) |
| 390 | .collect(Collectors.toList()); |
| 391 | //return Collections.unmodifiableList(ports.getEntries()); |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 392 | } |
| 393 | |
| 394 | @Override |
Ray Milkey | d3edd03 | 2015-01-16 11:38:58 -0800 | [diff] [blame] | 395 | public String manufacturerDescription() { |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 396 | return this.desc.getMfrDesc(); |
| 397 | } |
| 398 | |
| 399 | |
| 400 | @Override |
| 401 | public String datapathDescription() { |
| 402 | return this.desc.getDpDesc(); |
| 403 | } |
| 404 | |
| 405 | |
| 406 | @Override |
| 407 | public String hardwareDescription() { |
| 408 | return this.desc.getHwDesc(); |
| 409 | } |
| 410 | |
| 411 | @Override |
| 412 | public String softwareDescription() { |
| 413 | return this.desc.getSwDesc(); |
| 414 | } |
| 415 | |
| 416 | @Override |
| 417 | public String serialNumber() { |
| 418 | return this.desc.getSerialNum(); |
| 419 | } |
| 420 | |
Praseed Balakrishnan | a22eadf | 2014-10-20 14:21:45 -0700 | [diff] [blame] | 421 | @Override |
| 422 | public boolean isOptical() { |
| 423 | return false; |
| 424 | } |
| 425 | |
alshabib | 9af7007 | 2015-02-09 14:34:16 -0800 | [diff] [blame] | 426 | |
| 427 | |
tom | 7ef8ff9 | 2014-09-17 13:08:06 -0700 | [diff] [blame] | 428 | } |