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   1 /**
   2  * Copyright (c) 2010-2021 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.paradoxalarm.internal.communication;
  14
  15 import java.io.IOException;
  16 import java.util.Arrays;
  17 import java.util.concurrent.TimeUnit;
  18
  19 import org.openhab.binding.paradoxalarm.internal.communication.crypto.EncryptionHandler;
  20 import org.openhab.binding.paradoxalarm.internal.communication.messages.HeaderCommand;
  21 import org.openhab.binding.paradoxalarm.internal.communication.messages.HeaderMessageType;
  22 import org.openhab.binding.paradoxalarm.internal.communication.messages.IPPacket;
  23 import org.openhab.binding.paradoxalarm.internal.communication.messages.IpMessagesConstants;
  24 import org.openhab.binding.paradoxalarm.internal.communication.messages.ParadoxIPPacket;
  25 import org.openhab.binding.paradoxalarm.internal.model.ParadoxPanel;
  26 import org.openhab.binding.paradoxalarm.internal.util.ParadoxUtil;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 /**
  31  * The {@link CommunicationState}. This is enum based state machine used mostly for the logon process orchestration.
  32  *
  33  * @author Konstantin Polihronov - Initial contribution
  34  */
  35 public enum CommunicationState implements IResponseReceiver {
  36     START {
  37
  38         @Override
  39         protected CommunicationState nextState() {
  40             return STEP2;
  41         }
  42
  43         @Override
  44         protected void runPhase(IParadoxInitialLoginCommunicator communicator, Object... args) {
  45             String password = communicator.getPassword();
  46             logger.debug("Phase {}", this);
  47             if (communicator.isEncrypted()) {
  48                 EncryptionHandler.getInstance().updateKey(ParadoxUtil.getBytesFromString(password));
  49             }
  50             ParadoxIPPacket packet = new ParadoxIPPacket(ParadoxUtil.getBytesFromString(password), false)
  51                     .setCommand(HeaderCommand.CONNECT_TO_IP_MODULE);
  52             sendLogonPhasePacket(communicator, packet);
  53         }
  54
  55         @Override
  56         protected boolean isPhaseSuccess(IResponse response) {
  57             byte payloadResponseByte = response.getPayload()[0];
  58             if (payloadResponseByte == 0x00) {
  59                 logger.info("Login - Login to IP150 - OK");
  60                 return true;
  61             }
  62
  63             byte headerResponseByte = response.getHeader()[4];
  64             switch (headerResponseByte) {
  65                 case 0x30:
  66                     logger.warn("Login - Login to IP150 failed - Incorrect password");
  67                     break;
  68                 case 0x78:
  69                 case 0x79:
  70                     logger.warn("Login - IP module is busy");
  71                     break;
  72             }
  73
  74             switch (payloadResponseByte) {
  75                 case 0x01:
  76                     logger.warn("Login - Invalid password");
  77                     break;
  78                 case 0x02:
  79                 case 0x04:
  80                     logger.warn("Login - User already connected");
  81                     break;
  82                 default:
  83                     logger.warn("Login - Connection refused");
  84             }
  85             return false;
  86         }
  87
  88         @Override
  89         public void receiveResponse(IResponse response, IParadoxInitialLoginCommunicator communicator) {
  90             if (isPhaseSuccess(response)) {
  91                 // Retrieve new encryption key from first packet response and update it in encryption handler
  92                 if (communicator.isEncrypted()) {
  93                     byte[] payload = response.getPayload();
  94                     byte[] receivedKey = Arrays.copyOfRange(payload, 1, 17);
  95                     EncryptionHandler.getInstance().updateKey(receivedKey);
  96                 }
  97
  98                 logger.debug("Phase {} completed successfully.", this);
  99                 nextState().runPhase(communicator);
 100             }
 101         }
 102     },
 103     STEP2 {
 104
 105         @Override
 106         protected CommunicationState nextState() {
 107             return STEP3;
 108         }
 109
 110         @Override
 111         protected void runPhase(IParadoxInitialLoginCommunicator communicator, Object... args) {
 112             logger.debug("Phase {}", this);
 113             ParadoxIPPacket packet = new ParadoxIPPacket(ParadoxIPPacket.EMPTY_PAYLOAD, false)
 114                     .setCommand(HeaderCommand.LOGIN_COMMAND1);
 115             sendLogonPhasePacket(communicator, packet);
 116         }
 117     },
 118     STEP3 {
 119
 120         @Override
 121         protected CommunicationState nextState() {
 122             return STEP4;
 123         }
 124
 125         @Override
 126         protected void runPhase(IParadoxInitialLoginCommunicator communicator, Object... args) {
 127             logger.debug("Phase {}", this);
 128             ParadoxIPPacket packet = new ParadoxIPPacket(ParadoxIPPacket.EMPTY_PAYLOAD, false)
 129                     .setCommand(HeaderCommand.LOGIN_COMMAND2);
 130             sendLogonPhasePacket(communicator, packet);
 131         }
 132     },
 133     STEP4 {
 134
 135         @Override
 136         protected CommunicationState nextState() {
 137             return STEP5;
 138         }
 139
 140         @Override
 141         protected void runPhase(IParadoxInitialLoginCommunicator communicator, Object... args) {
 142             logger.debug("Phase {}", this);
 143             byte[] message4 = new byte[37];
 144             message4[0] = 0x72;
 145             ParadoxIPPacket packet = new ParadoxIPPacket(message4, true)
 146                     .setMessageType(HeaderMessageType.SERIAL_PASSTHRU_REQUEST);
 147             sendLogonPhasePacket(communicator, packet);
 148         }
 149
 150         @Override
 151         public void receiveResponse(IResponse response, IParadoxInitialLoginCommunicator communicator) {
 152             byte[] payload = response.getPayload();
 153             if (payload != null && payload.length >= 37) {
 154                 communicator.setPanelInfoBytes(payload);
 155                 logger.debug("Phase {} completed successfully.", this);
 156                 nextState().runPhase(communicator);
 157             } else {
 158                 logger.warn("Received wrong response in phase {}. Response: {}", this, response);
 159                 LOGOUT.runPhase(communicator);
 160             }
 161         }
 162     },
 163     STEP5 {
 164
 165         @Override
 166         protected CommunicationState nextState() {
 167             return STEP6;
 168         }
 169
 170         @Override
 171         protected void runPhase(IParadoxInitialLoginCommunicator communicator, Object... args) {
 172             logger.debug("Phase {}", this);
 173             ParadoxIPPacket packet = new ParadoxIPPacket(IpMessagesConstants.UNKNOWN_IP150_REQUEST_MESSAGE01, false)
 174                     .setCommand(HeaderCommand.SERIAL_CONNECTION_INITIATED);
 175             sendLogonPhasePacket(communicator, packet);
 176         }
 177     },
 178     STEP6 {
 179
 180         @Override
 181         protected CommunicationState nextState() {
 182             return STEP7;
 183         }
 184
 185         @Override
 186         protected void runPhase(IParadoxInitialLoginCommunicator communicator, Object... args) {
 187             logger.debug("Phase {}", this);
 188             byte[] message6 = new byte[37];
 189             message6[0] = 0x5F;
 190             message6[1] = 0x20;
 191             ParadoxIPPacket packet = new ParadoxIPPacket(message6, true)
 192                     .setMessageType(HeaderMessageType.SERIAL_PASSTHRU_REQUEST);
 193             sendLogonPhasePacket(communicator, packet);
 194         }
 195
 196         @Override
 197         public void receiveResponse(IResponse response, IParadoxInitialLoginCommunicator communicator) {
 198             byte[] payload = response.getPayload();
 199             ParadoxUtil.printPacket("Init communication sub array: ", payload);
 200             logger.debug("Phase {} completed successfully.", this);
 201             nextState().runPhase(communicator, payload);
 202         }
 203     },
 204     STEP7 {
 205
 206         @Override
 207         protected CommunicationState nextState() {
 208             return INITIALIZE_DATA;
 209         }
 210
 211         @Override
 212         protected void runPhase(IParadoxInitialLoginCommunicator communicator, Object... args) {
 213             if (args != null && args.length == 1) {
 214                 byte[] initializationMessage = (byte[]) args[0];
 215                 logger.debug("Phase {}", this);
 216                 byte[] message7 = generateInitializationRequest(initializationMessage,
 217                         communicator.getPcPasswordBytes());
 218                 ParadoxIPPacket packet = new ParadoxIPPacket(message7, true)
 219                         .setMessageType(HeaderMessageType.SERIAL_PASSTHRU_REQUEST).setUnknown0((byte) 0x14);
 220                 sendLogonPhasePacket(communicator, packet);
 221             } else {
 222                 logger.error("Error in step {}. Missing argument {}", this, args);
 223                 throw new IllegalArgumentException(
 224                         "Initialization message not send in request for phase + " + this + ". Arguments= " + args);
 225             }
 226         }
 227
 228         private byte[] generateInitializationRequest(byte[] initializationMessage, byte[] pcPassword) {
 229             byte[] message7 = new byte[] {
 230                     // Initialization command
 231                     0x00,
 232
 233                     // Module address
 234                     initializationMessage[1],
 235
 236                     // Not used
 237                     0x00, 0x00,
 238
 239                     // Product ID
 240                     initializationMessage[4],
 241
 242                     // Software version
 243                     initializationMessage[5],
 244
 245                     // Software revision
 246                     initializationMessage[6],
 247
 248                     // Software ID
 249                     initializationMessage[7],
 250
 251                     // Module ID
 252                     initializationMessage[8], initializationMessage[9],
 253
 254                     // PC Password
 255                     pcPassword[0], pcPassword[1],
 256
 257                     // Modem speed
 258                     0x08,
 259
 260                     // Winload type ID
 261                     0x30,
 262
 263                     // User code (aligned with PAI)
 264                     0x02, 0x02, 0x00,
 265
 266                     // Module serial number
 267                     initializationMessage[17], initializationMessage[18], initializationMessage[19],
 268                     initializationMessage[20],
 269
 270                     // EVO section 3030-3038 data
 271                     initializationMessage[21], initializationMessage[22], initializationMessage[23],
 272                     initializationMessage[24], initializationMessage[25], initializationMessage[26],
 273                     initializationMessage[27], initializationMessage[28], initializationMessage[29],
 274
 275                     // Not used
 276                     0x00, 0x00, 0x00, 0x00,
 277
 278                     // Source ID
 279                     0x00,
 280
 281                     // Carrier length
 282                     0x00,
 283
 284                     // Checksum
 285                     0x00 };
 286             return message7;
 287         }
 288
 289         @Override
 290         public void receiveResponse(IResponse response, IParadoxInitialLoginCommunicator communicator) {
 291             // UGLY - this is the handling of ghost packet which appears after the logon sequence
 292             // Read ghost packet affter 300ms then continue with normal flow
 293             communicator.getScheduler().schedule(() -> {
 294                 if (communicator instanceof GenericCommunicator) {
 295                     try {
 296                         GenericCommunicator genCommunicator = (GenericCommunicator) communicator;
 297                         byte[] value = new byte[256];
 298                         int packetLength = genCommunicator.getRx().read(value);
 299                         logger.debug("Reading ghost packet with length={}", packetLength);
 300                         ParadoxUtil.printPacket("Reading ghost packet", value);
 301                     } catch (IOException e) {
 302                         logger.debug("Error reading ghost packet.", e);
 303                     }
 304
 305                     super.receiveResponse(response, communicator);
 306                 }
 307             }, 300, TimeUnit.MILLISECONDS);
 308         }
 309     },
 310     INITIALIZE_DATA {
 311
 312         @Override
 313         protected CommunicationState nextState() {
 314             return ONLINE;
 315         }
 316
 317         @Override
 318         protected void runPhase(IParadoxInitialLoginCommunicator communicator, Object... args) {
 319             if (communicator instanceof IParadoxCommunicator) {
 320                 IParadoxCommunicator comm = (IParadoxCommunicator) communicator;
 321                 comm.initializeData();
 322             }
 323             nextState().runPhase(communicator);
 324         }
 325     },
 326     ONLINE {
 327
 328         @Override
 329         protected CommunicationState nextState() {
 330             return this;
 331         }
 332
 333         @Override
 334         protected void runPhase(IParadoxInitialLoginCommunicator communicator, Object... args) {
 335             logger.debug("Phase {}. Setting communicator to status ONLINE.", this);
 336             communicator.setOnline(true);
 337             logger.info("Successfully established communication with the panel.");
 338         }
 339     },
 340     LOGOUT {
 341
 342         @Override
 343         protected CommunicationState nextState() {
 344             return OFFLINE;
 345         }
 346
 347         @Override
 348         protected void runPhase(IParadoxInitialLoginCommunicator communicator, Object... args) {
 349             // For some reason after sending logout packet the connection gets reset from the other end
 350             // currently workaround is to run directly offline phase, i.e. close socket from our end
 351
 352             // logger.info("Logout packet sent to IP150.");
 353             // ParadoxIPPacket logoutPacket = new ParadoxIPPacket(IpMessagesConstants.LOGOUT_MESAGE_BYTES, true)
 354             // .setMessageType(HeaderMessageType.SERIAL_PASSTHRU_REQUEST).setUnknown0((byte) 0x14);
 355             // sendPacket(communicator, logoutPacket);
 356             nextState().runPhase(communicator);
 357         }
 358     },
 359     OFFLINE {
 360
 361         @Override
 362         protected CommunicationState nextState() {
 363             return this;
 364         }
 365
 366         @Override
 367         protected void runPhase(IParadoxInitialLoginCommunicator communicator, Object... args) {
 368             if (communicator != null) {
 369                 communicator.close();
 370             }
 371             ParadoxPanel.getInstance().dispose();
 372         }
 373     };
 374
 375     protected final Logger logger = LoggerFactory.getLogger(CommunicationState.class);
 376
 377     private static CommunicationState currentState = CommunicationState.OFFLINE;
 378
 379     // This method is the entry of logon procedure.
 380     public static void login(IParadoxInitialLoginCommunicator communicator) {
 381         START.runPhase(communicator);
 382     }
 383
 384     public static void logout(IParadoxInitialLoginCommunicator communicator) {
 385         LOGOUT.runPhase(communicator);
 386     }
 387
 388     protected abstract CommunicationState nextState();
 389
 390     protected abstract void runPhase(IParadoxInitialLoginCommunicator communicator, Object... args);
 391
 392     protected void runPhase(IParadoxInitialLoginCommunicator communicator) {
 393         setCurrentState(this);
 394         runPhase(communicator, new Object[0]);
 395     }
 396
 397     protected void sendLogonPhasePacket(IParadoxInitialLoginCommunicator communicator, IPPacket packet) {
 398         IRequest request = new LogonRequest(this, packet);
 399         communicator.submitRequest(request);
 400     }
 401
 402     @Override
 403     public void receiveResponse(IResponse response, IParadoxInitialLoginCommunicator communicator) {
 404         if (isPhaseSuccess(response)) {
 405             logger.debug("Phase {} completed successfully.", this);
 406             nextState().runPhase(communicator);
 407         }
 408     }
 409
 410     protected boolean isPhaseSuccess(IResponse response) {
 411         return true;
 412     }
 413
 414     public static CommunicationState getCurrentState() {
 415         return currentState;
 416     }
 417
 418     public static void setCurrentState(CommunicationState currentState) {
 419         CommunicationState.currentState = currentState;
 420     }
 421 }