1 /* 2 * Copyright (C) 2008 The Android Open Source Project 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 android.net.wifi; 18 19 import android.net.NetworkInfo; 20 import android.net.wifi.p2p.WifiP2pConfig; 21 import android.net.wifi.p2p.WifiP2pDevice; 22 import android.net.wifi.p2p.WifiP2pGroup; 23 import android.net.wifi.p2p.WifiP2pService; 24 import android.net.wifi.p2p.WifiP2pService.P2pStatus; 25 import android.net.wifi.p2p.WifiP2pProvDiscEvent; 26 import android.net.wifi.p2p.nsd.WifiP2pServiceResponse; 27 import android.net.wifi.StateChangeResult; 28 import android.os.Message; 29 import android.util.Log; 30 31 32 import com.android.internal.util.Protocol; 33 import com.android.internal.util.StateMachine; 34 35 import java.util.HashMap; 36 import java.util.Iterator; 37 import java.util.List; 38 import java.util.Map; 39 import java.util.regex.Pattern; 40 import java.util.regex.Matcher; 41 42 /** 43 * Listens for events from the wpa_supplicant server, and passes them on 44 * to the {@link StateMachine} for handling. Runs in its own thread. 45 * 46 * @hide 47 */ 48 public class WifiMonitor { 49 50 private static final boolean DBG = false; 51 private static final String TAG = "WifiMonitor"; 52 53 /** Events we receive from the supplicant daemon */ 54 55 private static final int CONNECTED = 1; 56 private static final int DISCONNECTED = 2; 57 private static final int STATE_CHANGE = 3; 58 private static final int SCAN_RESULTS = 4; 59 private static final int LINK_SPEED = 5; 60 private static final int TERMINATING = 6; 61 private static final int DRIVER_STATE = 7; 62 private static final int EAP_FAILURE = 8; 63 private static final int ASSOC_REJECT = 9; 64 private static final int UNKNOWN = 10; 65 66 /** All events coming from the supplicant start with this prefix */ 67 private static final String EVENT_PREFIX_STR = "CTRL-EVENT-"; 68 private static final int EVENT_PREFIX_LEN_STR = EVENT_PREFIX_STR.length(); 69 70 /** All WPA events coming from the supplicant start with this prefix */ 71 private static final String WPA_EVENT_PREFIX_STR = "WPA:"; 72 private static final String PASSWORD_MAY_BE_INCORRECT_STR = 73 "pre-shared key may be incorrect"; 74 75 /* WPS events */ 76 private static final String WPS_SUCCESS_STR = "WPS-SUCCESS"; 77 78 /* Format: WPS-FAIL msg=%d [config_error=%d] [reason=%d (%s)] */ 79 private static final String WPS_FAIL_STR = "WPS-FAIL"; 80 private static final String WPS_FAIL_PATTERN = 81 "WPS-FAIL msg=\\d+(?: config_error=(\\d+))?(?: reason=(\\d+))?"; 82 83 /* config error code values for config_error=%d */ 84 private static final int CONFIG_MULTIPLE_PBC_DETECTED = 12; 85 private static final int CONFIG_AUTH_FAILURE = 18; 86 87 /* reason code values for reason=%d */ 88 private static final int REASON_TKIP_ONLY_PROHIBITED = 1; 89 private static final int REASON_WEP_PROHIBITED = 2; 90 91 private static final String WPS_OVERLAP_STR = "WPS-OVERLAP-DETECTED"; 92 private static final String WPS_TIMEOUT_STR = "WPS-TIMEOUT"; 93 94 /** 95 * Names of events from wpa_supplicant (minus the prefix). In the 96 * format descriptions, * "<code>x</code>" 97 * designates a dynamic value that needs to be parsed out from the event 98 * string 99 */ 100 /** 101 * <pre> 102 * CTRL-EVENT-CONNECTED - Connection to xx:xx:xx:xx:xx:xx completed 103 * </pre> 104 * <code>xx:xx:xx:xx:xx:xx</code> is the BSSID of the associated access point 105 */ 106 private static final String CONNECTED_STR = "CONNECTED"; 107 /** 108 * <pre> 109 * CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys 110 * </pre> 111 */ 112 private static final String DISCONNECTED_STR = "DISCONNECTED"; 113 /** 114 * <pre> 115 * CTRL-EVENT-STATE-CHANGE x 116 * </pre> 117 * <code>x</code> is the numerical value of the new state. 118 */ 119 private static final String STATE_CHANGE_STR = "STATE-CHANGE"; 120 /** 121 * <pre> 122 * CTRL-EVENT-SCAN-RESULTS ready 123 * </pre> 124 */ 125 private static final String SCAN_RESULTS_STR = "SCAN-RESULTS"; 126 127 /** 128 * <pre> 129 * CTRL-EVENT-LINK-SPEED x Mb/s 130 * </pre> 131 * {@code x} is the link speed in Mb/sec. 132 */ 133 private static final String LINK_SPEED_STR = "LINK-SPEED"; 134 /** 135 * <pre> 136 * CTRL-EVENT-TERMINATING - signal x 137 * </pre> 138 * <code>x</code> is the signal that caused termination. 139 */ 140 private static final String TERMINATING_STR = "TERMINATING"; 141 /** 142 * <pre> 143 * CTRL-EVENT-DRIVER-STATE state 144 * </pre> 145 * <code>state</code> can be HANGED 146 */ 147 private static final String DRIVER_STATE_STR = "DRIVER-STATE"; 148 /** 149 * <pre> 150 * CTRL-EVENT-EAP-FAILURE EAP authentication failed 151 * </pre> 152 */ 153 private static final String EAP_FAILURE_STR = "EAP-FAILURE"; 154 155 /** 156 * This indicates an authentication failure on EAP FAILURE event 157 */ 158 private static final String EAP_AUTH_FAILURE_STR = "EAP authentication failed"; 159 160 /** 161 * This indicates an assoc reject event 162 */ 163 private static final String ASSOC_REJECT_STR = "ASSOC-REJECT"; 164 165 /** 166 * Regex pattern for extracting an Ethernet-style MAC address from a string. 167 * Matches a strings like the following:<pre> 168 * CTRL-EVENT-CONNECTED - Connection to 00:1e:58:ec:d5:6d completed (reauth) [id=1 id_str=]</pre> 169 */ 170 private static Pattern mConnectedEventPattern = 171 Pattern.compile("((?:[0-9a-f]{2}:){5}[0-9a-f]{2}) .* \\[id=([0-9]+) "); 172 173 /** P2P events */ 174 private static final String P2P_EVENT_PREFIX_STR = "P2P"; 175 176 /* P2P-DEVICE-FOUND fa:7b:7a:42:02:13 p2p_dev_addr=fa:7b:7a:42:02:13 pri_dev_type=1-0050F204-1 177 name='p2p-TEST1' config_methods=0x188 dev_capab=0x27 group_capab=0x0 */ 178 private static final String P2P_DEVICE_FOUND_STR = "P2P-DEVICE-FOUND"; 179 180 /* P2P-DEVICE-LOST p2p_dev_addr=42:fc:89:e1:e2:27 */ 181 private static final String P2P_DEVICE_LOST_STR = "P2P-DEVICE-LOST"; 182 183 /* P2P-FIND-STOPPED */ 184 private static final String P2P_FIND_STOPPED_STR = "P2P-FIND-STOPPED"; 185 186 /* P2P-GO-NEG-REQUEST 42:fc:89:a8:96:09 dev_passwd_id=4 */ 187 private static final String P2P_GO_NEG_REQUEST_STR = "P2P-GO-NEG-REQUEST"; 188 189 private static final String P2P_GO_NEG_SUCCESS_STR = "P2P-GO-NEG-SUCCESS"; 190 191 /* P2P-GO-NEG-FAILURE status=x */ 192 private static final String P2P_GO_NEG_FAILURE_STR = "P2P-GO-NEG-FAILURE"; 193 194 private static final String P2P_GROUP_FORMATION_SUCCESS_STR = 195 "P2P-GROUP-FORMATION-SUCCESS"; 196 197 private static final String P2P_GROUP_FORMATION_FAILURE_STR = 198 "P2P-GROUP-FORMATION-FAILURE"; 199 200 /* P2P-GROUP-STARTED p2p-wlan0-0 [client|GO] ssid="DIRECT-W8" freq=2437 201 [psk=2182b2e50e53f260d04f3c7b25ef33c965a3291b9b36b455a82d77fd82ca15bc|passphrase="fKG4jMe3"] 202 go_dev_addr=fa:7b:7a:42:02:13 [PERSISTENT] */ 203 private static final String P2P_GROUP_STARTED_STR = "P2P-GROUP-STARTED"; 204 205 /* P2P-GROUP-REMOVED p2p-wlan0-0 [client|GO] reason=REQUESTED */ 206 private static final String P2P_GROUP_REMOVED_STR = "P2P-GROUP-REMOVED"; 207 208 /* P2P-INVITATION-RECEIVED sa=fa:7b:7a:42:02:13 go_dev_addr=f8:7b:7a:42:02:13 209 bssid=fa:7b:7a:42:82:13 unknown-network */ 210 private static final String P2P_INVITATION_RECEIVED_STR = "P2P-INVITATION-RECEIVED"; 211 212 /* P2P-INVITATION-RESULT status=1 */ 213 private static final String P2P_INVITATION_RESULT_STR = "P2P-INVITATION-RESULT"; 214 215 /* P2P-PROV-DISC-PBC-REQ 42:fc:89:e1:e2:27 p2p_dev_addr=42:fc:89:e1:e2:27 216 pri_dev_type=1-0050F204-1 name='p2p-TEST2' config_methods=0x188 dev_capab=0x27 217 group_capab=0x0 */ 218 private static final String P2P_PROV_DISC_PBC_REQ_STR = "P2P-PROV-DISC-PBC-REQ"; 219 220 /* P2P-PROV-DISC-PBC-RESP 02:12:47:f2:5a:36 */ 221 private static final String P2P_PROV_DISC_PBC_RSP_STR = "P2P-PROV-DISC-PBC-RESP"; 222 223 /* P2P-PROV-DISC-ENTER-PIN 42:fc:89:e1:e2:27 p2p_dev_addr=42:fc:89:e1:e2:27 224 pri_dev_type=1-0050F204-1 name='p2p-TEST2' config_methods=0x188 dev_capab=0x27 225 group_capab=0x0 */ 226 private static final String P2P_PROV_DISC_ENTER_PIN_STR = "P2P-PROV-DISC-ENTER-PIN"; 227 /* P2P-PROV-DISC-SHOW-PIN 42:fc:89:e1:e2:27 44490607 p2p_dev_addr=42:fc:89:e1:e2:27 228 pri_dev_type=1-0050F204-1 name='p2p-TEST2' config_methods=0x188 dev_capab=0x27 229 group_capab=0x0 */ 230 private static final String P2P_PROV_DISC_SHOW_PIN_STR = "P2P-PROV-DISC-SHOW-PIN"; 231 /* P2P-PROV-DISC-FAILURE p2p_dev_addr=42:fc:89:e1:e2:27 */ 232 private static final String P2P_PROV_DISC_FAILURE_STR = "P2P-PROV-DISC-FAILURE"; 233 234 /* 235 * Protocol format is as follows.<br> 236 * See the Table.62 in the WiFi Direct specification for the detail. 237 * ______________________________________________________________ 238 * | Length(2byte) | Type(1byte) | TransId(1byte)}| 239 * ______________________________________________________________ 240 * | status(1byte) | vendor specific(variable) | 241 * 242 * P2P-SERV-DISC-RESP 42:fc:89:e1:e2:27 1 0300000101 243 * length=3, service type=0(ALL Service), transaction id=1, 244 * status=1(service protocol type not available)<br> 245 * 246 * P2P-SERV-DISC-RESP 42:fc:89:e1:e2:27 1 0300020201 247 * length=3, service type=2(UPnP), transaction id=2, 248 * status=1(service protocol type not available) 249 * 250 * P2P-SERV-DISC-RESP 42:fc:89:e1:e2:27 1 990002030010757569643a3131323 251 * 2646534652d383537342d353961622d393332322d3333333435363738393034343a3 252 * a75726e3a736368656d61732d75706e702d6f72673a736572766963653a436f6e746 253 * 56e744469726563746f72793a322c757569643a36383539646564652d383537342d3 254 * 53961622d393333322d3132333435363738393031323a3a75706e703a726f6f74646 255 * 576696365 256 * length=153,type=2(UPnP),transaction id=3,status=0 257 * 258 * UPnP Protocol format is as follows. 259 * ______________________________________________________ 260 * | Version (1) | USN (Variable) | 261 * 262 * version=0x10(UPnP1.0) data=usn:uuid:1122de4e-8574-59ab-9322-33345678 263 * 9044::urn:schemas-upnp-org:service:ContentDirectory:2,usn:uuid:6859d 264 * ede-8574-59ab-9332-123456789012::upnp:rootdevice 265 * 266 * P2P-SERV-DISC-RESP 58:17:0c:bc:dd:ca 21 1900010200045f6970 267 * 70c00c000c01094d795072696e746572c027 268 * length=25, type=1(Bonjour),transaction id=2,status=0 269 * 270 * Bonjour Protocol format is as follows. 271 * __________________________________________________________ 272 * |DNS Name(Variable)|DNS Type(1)|Version(1)|RDATA(Variable)| 273 * 274 * DNS Name=_ipp._tcp.local.,DNS type=12(PTR), Version=1, 275 * RDATA=MyPrinter._ipp._tcp.local. 276 * 277 */ 278 private static final String P2P_SERV_DISC_RESP_STR = "P2P-SERV-DISC-RESP"; 279 280 private static final String HOST_AP_EVENT_PREFIX_STR = "AP"; 281 /* AP-STA-CONNECTED 42:fc:89:a8:96:09 dev_addr=02:90:4c:a0:92:54 */ 282 private static final String AP_STA_CONNECTED_STR = "AP-STA-CONNECTED"; 283 /* AP-STA-DISCONNECTED 42:fc:89:a8:96:09 */ 284 private static final String AP_STA_DISCONNECTED_STR = "AP-STA-DISCONNECTED"; 285 286 /* Supplicant events reported to a state machine */ 287 private static final int BASE = Protocol.BASE_WIFI_MONITOR; 288 289 /* Connection to supplicant established */ 290 public static final int SUP_CONNECTION_EVENT = BASE + 1; 291 /* Connection to supplicant lost */ 292 public static final int SUP_DISCONNECTION_EVENT = BASE + 2; 293 /* Network connection completed */ 294 public static final int NETWORK_CONNECTION_EVENT = BASE + 3; 295 /* Network disconnection completed */ 296 public static final int NETWORK_DISCONNECTION_EVENT = BASE + 4; 297 /* Scan results are available */ 298 public static final int SCAN_RESULTS_EVENT = BASE + 5; 299 /* Supplicate state changed */ 300 public static final int SUPPLICANT_STATE_CHANGE_EVENT = BASE + 6; 301 /* Password failure and EAP authentication failure */ 302 public static final int AUTHENTICATION_FAILURE_EVENT = BASE + 7; 303 /* WPS success detected */ 304 public static final int WPS_SUCCESS_EVENT = BASE + 8; 305 /* WPS failure detected */ 306 public static final int WPS_FAIL_EVENT = BASE + 9; 307 /* WPS overlap detected */ 308 public static final int WPS_OVERLAP_EVENT = BASE + 10; 309 /* WPS timeout detected */ 310 public static final int WPS_TIMEOUT_EVENT = BASE + 11; 311 /* Driver was hung */ 312 public static final int DRIVER_HUNG_EVENT = BASE + 12; 313 314 /* P2P events */ 315 public static final int P2P_DEVICE_FOUND_EVENT = BASE + 21; 316 public static final int P2P_DEVICE_LOST_EVENT = BASE + 22; 317 public static final int P2P_GO_NEGOTIATION_REQUEST_EVENT = BASE + 23; 318 public static final int P2P_GO_NEGOTIATION_SUCCESS_EVENT = BASE + 25; 319 public static final int P2P_GO_NEGOTIATION_FAILURE_EVENT = BASE + 26; 320 public static final int P2P_GROUP_FORMATION_SUCCESS_EVENT = BASE + 27; 321 public static final int P2P_GROUP_FORMATION_FAILURE_EVENT = BASE + 28; 322 public static final int P2P_GROUP_STARTED_EVENT = BASE + 29; 323 public static final int P2P_GROUP_REMOVED_EVENT = BASE + 30; 324 public static final int P2P_INVITATION_RECEIVED_EVENT = BASE + 31; 325 public static final int P2P_INVITATION_RESULT_EVENT = BASE + 32; 326 public static final int P2P_PROV_DISC_PBC_REQ_EVENT = BASE + 33; 327 public static final int P2P_PROV_DISC_PBC_RSP_EVENT = BASE + 34; 328 public static final int P2P_PROV_DISC_ENTER_PIN_EVENT = BASE + 35; 329 public static final int P2P_PROV_DISC_SHOW_PIN_EVENT = BASE + 36; 330 public static final int P2P_FIND_STOPPED_EVENT = BASE + 37; 331 public static final int P2P_SERV_DISC_RESP_EVENT = BASE + 38; 332 public static final int P2P_PROV_DISC_FAILURE_EVENT = BASE + 39; 333 334 /* hostap events */ 335 public static final int AP_STA_DISCONNECTED_EVENT = BASE + 41; 336 public static final int AP_STA_CONNECTED_EVENT = BASE + 42; 337 338 /* Indicates assoc reject event */ 339 public static final int ASSOCIATION_REJECTION_EVENT = BASE + 43; 340 /** 341 * This indicates the supplicant connection for the monitor is closed 342 */ 343 private static final String MONITOR_SOCKET_CLOSED_STR = "connection closed"; 344 345 /** 346 * This indicates a read error on the monitor socket conenction 347 */ 348 private static final String WPA_RECV_ERROR_STR = "recv error"; 349 350 /** 351 * Max errors before we close supplicant connection 352 */ 353 private static final int MAX_RECV_ERRORS = 10; 354 355 private final String mInterfaceName; 356 private final WifiNative mWifiNative; 357 private final StateMachine mWifiStateMachine; 358 private boolean mMonitoring; 359 360 public WifiMonitor(StateMachine wifiStateMachine, WifiNative wifiNative) { 361 if (DBG) Log.d(TAG, "Creating WifiMonitor"); 362 mWifiNative = wifiNative; 363 mInterfaceName = wifiNative.mInterfaceName; 364 mWifiStateMachine = wifiStateMachine; 365 mMonitoring = false; 366 367 WifiMonitorSingleton.getMonitor().registerInterfaceMonitor(mInterfaceName, this); 368 } 369 370 public void startMonitoring() { 371 WifiMonitorSingleton.getMonitor().startMonitoring(mInterfaceName); 372 } 373 374 public void stopMonitoring() { 375 WifiMonitorSingleton.getMonitor().stopMonitoring(mInterfaceName); 376 } 377 378 public void stopSupplicant() { 379 WifiMonitorSingleton.getMonitor().stopSupplicant(); 380 } 381 382 public void killSupplicant(boolean p2pSupported) { 383 WifiMonitorSingleton.getMonitor().killSupplicant(p2pSupported); 384 } 385 386 private static class WifiMonitorSingleton { 387 private static Object sSingletonLock = new Object(); 388 private static WifiMonitorSingleton sWifiMonitorSingleton = null; 389 private HashMap<String, WifiMonitor> mIfaceMap = new HashMap<String, WifiMonitor>(); 390 private boolean mConnected = false; 391 private WifiNative mWifiNative; 392 393 private WifiMonitorSingleton() { 394 } 395 396 static WifiMonitorSingleton getMonitor() { 397 if (DBG) Log.d(TAG, "WifiMonitorSingleton gotten"); 398 synchronized (sSingletonLock) { 399 if (sWifiMonitorSingleton == null) { 400 if (DBG) Log.d(TAG, "WifiMonitorSingleton created"); 401 sWifiMonitorSingleton = new WifiMonitorSingleton(); 402 } 403 } 404 return sWifiMonitorSingleton; 405 } 406 407 public synchronized void startMonitoring(String iface) { 408 WifiMonitor m = mIfaceMap.get(iface); 409 if (m == null) { 410 Log.e(TAG, "startMonitor called with unknown iface=" + iface); 411 return; 412 } 413 414 Log.d(TAG, "startMonitoring(" + iface + ") with mConnected = " + mConnected); 415 416 if (mConnected) { 417 m.mMonitoring = true; 418 m.mWifiStateMachine.sendMessage(SUP_CONNECTION_EVENT); 419 } else { 420 if (DBG) Log.d(TAG, "connecting to supplicant"); 421 int connectTries = 0; 422 while (true) { 423 if (mWifiNative.connectToSupplicant()) { 424 m.mMonitoring = true; 425 m.mWifiStateMachine.sendMessage(SUP_CONNECTION_EVENT); 426 new MonitorThread(mWifiNative, this).start(); 427 mConnected = true; 428 break; 429 } 430 if (connectTries++ < 5) { 431 try { 432 Thread.sleep(1000); 433 } catch (InterruptedException ignore) { 434 } 435 } else { 436 mIfaceMap.remove(iface); 437 m.mWifiStateMachine.sendMessage(SUP_DISCONNECTION_EVENT); 438 Log.e(TAG, "startMonitoring(" + iface + ") failed!"); 439 break; 440 } 441 } 442 } 443 } 444 445 public synchronized void stopMonitoring(String iface) { 446 WifiMonitor m = mIfaceMap.get(iface); 447 if (DBG) Log.d(TAG, "stopMonitoring(" + iface + ") = " + m.mWifiStateMachine); 448 m.mMonitoring = false; 449 m.mWifiStateMachine.sendMessage(SUP_DISCONNECTION_EVENT); 450 } 451 452 public synchronized void registerInterfaceMonitor(String iface, WifiMonitor m) { 453 if (DBG) Log.d(TAG, "registerInterface(" + iface + "+" + m.mWifiStateMachine + ")"); 454 mIfaceMap.put(iface, m); 455 if (mWifiNative == null) { 456 mWifiNative = m.mWifiNative; 457 } 458 } 459 460 public synchronized void unregisterInterfaceMonitor(String iface) { 461 // REVIEW: When should we call this? If this isn't called, then WifiMonitor 462 // objects will remain in the mIfaceMap; and won't ever get deleted 463 464 WifiMonitor m = mIfaceMap.remove(iface); 465 if (DBG) Log.d(TAG, "unregisterInterface(" + iface + "+" + m.mWifiStateMachine + ")"); 466 } 467 468 public synchronized void stopSupplicant() { 469 mWifiNative.stopSupplicant(); 470 } 471 472 public synchronized void killSupplicant(boolean p2pSupported) { 473 mWifiNative.killSupplicant(p2pSupported); 474 mConnected = false; 475 Iterator<Map.Entry<String, WifiMonitor>> it = mIfaceMap.entrySet().iterator(); 476 while (it.hasNext()) { 477 Map.Entry<String, WifiMonitor> e = it.next(); 478 WifiMonitor m = e.getValue(); 479 m.mMonitoring = false; 480 } 481 } 482 483 private synchronized WifiMonitor getMonitor(String iface) { 484 return mIfaceMap.get(iface); 485 } 486 } 487 488 private static class MonitorThread extends Thread { 489 private final WifiNative mWifiNative; 490 private final WifiMonitorSingleton mWifiMonitorSingleton; 491 private int mRecvErrors = 0; 492 private StateMachine mStateMachine = null; 493 494 public MonitorThread(WifiNative wifiNative, WifiMonitorSingleton wifiMonitorSingleton) { 495 super("WifiMonitor"); 496 mWifiNative = wifiNative; 497 mWifiMonitorSingleton = wifiMonitorSingleton; 498 } 499 500 public void run() { 501 //noinspection InfiniteLoopStatement 502 for (;;) { 503 String eventStr = mWifiNative.waitForEvent(); 504 505 // Skip logging the common but mostly uninteresting scan-results event 506 if (DBG && eventStr.indexOf(SCAN_RESULTS_STR) == -1) { 507 Log.d(TAG, "Event [" + eventStr + "]"); 508 } 509 510 String iface = "p2p0"; 511 WifiMonitor m = null; 512 mStateMachine = null; 513 514 if (eventStr.startsWith("IFNAME=")) { 515 int space = eventStr.indexOf(' '); 516 if (space != -1) { 517 iface = eventStr.substring(7,space); 518 m = mWifiMonitorSingleton.getMonitor(iface); 519 if (m == null && iface.startsWith("p2p-")) { 520 // p2p interfaces are created dynamically, but we have 521 // only one P2p state machine monitoring all of them; look 522 // for it explicitly, and send messages there .. 523 m = mWifiMonitorSingleton.getMonitor("p2p0"); 524 } 525 eventStr = eventStr.substring(space + 1); 526 } 527 } else { 528 // events without prefix belong to p2p0 monitor 529 m = mWifiMonitorSingleton.getMonitor("p2p0"); 530 } 531 532 if (m != null) { 533 if (m.mMonitoring) { 534 mStateMachine = m.mWifiStateMachine; 535 } else { 536 if (DBG) Log.d(TAG, "Dropping event because monitor (" + iface + 537 ") is stopped"); 538 continue; 539 } 540 } 541 542 if (mStateMachine != null) { 543 if (dispatchEvent(eventStr)) { 544 break; 545 } 546 } else { 547 if (DBG) Log.d(TAG, "Sending to all monitors because there's no interface id"); 548 boolean done = false; 549 Iterator<Map.Entry<String, WifiMonitor>> it = 550 mWifiMonitorSingleton.mIfaceMap.entrySet().iterator(); 551 while (it.hasNext()) { 552 Map.Entry<String, WifiMonitor> e = it.next(); 553 m = e.getValue(); 554 mStateMachine = m.mWifiStateMachine; 555 if (dispatchEvent(eventStr)) { 556 done = true; 557 } 558 } 559 560 if (done) { 561 // After this thread terminates, we'll no longer 562 // be connected to the supplicant 563 if (DBG) Log.d(TAG, "Disconnecting from the supplicant, no more events"); 564 mWifiMonitorSingleton.mConnected = false; 565 break; 566 } 567 } 568 } 569 } 570 571 /* @return true if the event was supplicant disconnection */ 572 private boolean dispatchEvent(String eventStr) { 573 574 if (!eventStr.startsWith(EVENT_PREFIX_STR)) { 575 if (eventStr.startsWith(WPA_EVENT_PREFIX_STR) && 576 0 < eventStr.indexOf(PASSWORD_MAY_BE_INCORRECT_STR)) { 577 mStateMachine.sendMessage(AUTHENTICATION_FAILURE_EVENT); 578 } else if (eventStr.startsWith(WPS_SUCCESS_STR)) { 579 mStateMachine.sendMessage(WPS_SUCCESS_EVENT); 580 } else if (eventStr.startsWith(WPS_FAIL_STR)) { 581 handleWpsFailEvent(eventStr); 582 } else if (eventStr.startsWith(WPS_OVERLAP_STR)) { 583 mStateMachine.sendMessage(WPS_OVERLAP_EVENT); 584 } else if (eventStr.startsWith(WPS_TIMEOUT_STR)) { 585 mStateMachine.sendMessage(WPS_TIMEOUT_EVENT); 586 } else if (eventStr.startsWith(P2P_EVENT_PREFIX_STR)) { 587 handleP2pEvents(eventStr); 588 } else if (eventStr.startsWith(HOST_AP_EVENT_PREFIX_STR)) { 589 handleHostApEvents(eventStr); 590 } 591 else { 592 if (DBG) Log.w(TAG, "couldn't identify event type - " + eventStr); 593 } 594 return false; 595 } 596 597 String eventName = eventStr.substring(EVENT_PREFIX_LEN_STR); 598 int nameEnd = eventName.indexOf(' '); 599 if (nameEnd != -1) 600 eventName = eventName.substring(0, nameEnd); 601 if (eventName.length() == 0) { 602 if (DBG) Log.i(TAG, "Received wpa_supplicant event with empty event name"); 603 return false; 604 } 605 /* 606 * Map event name into event enum 607 */ 608 int event; 609 if (eventName.equals(CONNECTED_STR)) 610 event = CONNECTED; 611 else if (eventName.equals(DISCONNECTED_STR)) 612 event = DISCONNECTED; 613 else if (eventName.equals(STATE_CHANGE_STR)) 614 event = STATE_CHANGE; 615 else if (eventName.equals(SCAN_RESULTS_STR)) 616 event = SCAN_RESULTS; 617 else if (eventName.equals(LINK_SPEED_STR)) 618 event = LINK_SPEED; 619 else if (eventName.equals(TERMINATING_STR)) 620 event = TERMINATING; 621 else if (eventName.equals(DRIVER_STATE_STR)) 622 event = DRIVER_STATE; 623 else if (eventName.equals(EAP_FAILURE_STR)) 624 event = EAP_FAILURE; 625 else if (eventName.equals(ASSOC_REJECT_STR)) 626 event = ASSOC_REJECT; 627 else 628 event = UNKNOWN; 629 630 String eventData = eventStr; 631 if (event == DRIVER_STATE || event == LINK_SPEED) 632 eventData = eventData.split(" ")[1]; 633 else if (event == STATE_CHANGE || event == EAP_FAILURE) { 634 int ind = eventStr.indexOf(" "); 635 if (ind != -1) { 636 eventData = eventStr.substring(ind + 1); 637 } 638 } else { 639 int ind = eventStr.indexOf(" - "); 640 if (ind != -1) { 641 eventData = eventStr.substring(ind + 3); 642 } 643 } 644 645 if (event == STATE_CHANGE) { 646 handleSupplicantStateChange(eventData); 647 } else if (event == DRIVER_STATE) { 648 handleDriverEvent(eventData); 649 } else if (event == TERMINATING) { 650 /** 651 * Close the supplicant connection if we see 652 * too many recv errors 653 */ 654 if (eventData.startsWith(WPA_RECV_ERROR_STR)) { 655 if (++mRecvErrors > MAX_RECV_ERRORS) { 656 if (DBG) { 657 Log.d(TAG, "too many recv errors, closing connection"); 658 } 659 } else { 660 return false; 661 } 662 } 663 664 // notify and exit 665 mStateMachine.sendMessage(SUP_DISCONNECTION_EVENT); 666 return true; 667 } else if (event == EAP_FAILURE) { 668 if (eventData.startsWith(EAP_AUTH_FAILURE_STR)) { 669 mStateMachine.sendMessage(AUTHENTICATION_FAILURE_EVENT); 670 } 671 } else if (event == ASSOC_REJECT) { 672 mStateMachine.sendMessage(ASSOCIATION_REJECTION_EVENT); 673 } else { 674 handleEvent(event, eventData); 675 } 676 mRecvErrors = 0; 677 return false; 678 } 679 680 private void handleDriverEvent(String state) { 681 if (state == null) { 682 return; 683 } 684 if (state.equals("HANGED")) { 685 mStateMachine.sendMessage(DRIVER_HUNG_EVENT); 686 } 687 } 688 689 /** 690 * Handle all supplicant events except STATE-CHANGE 691 * @param event the event type 692 * @param remainder the rest of the string following the 693 * event name and " — " 694 */ 695 void handleEvent(int event, String remainder) { 696 switch (event) { 697 case DISCONNECTED: 698 handleNetworkStateChange(NetworkInfo.DetailedState.DISCONNECTED, remainder); 699 break; 700 701 case CONNECTED: 702 handleNetworkStateChange(NetworkInfo.DetailedState.CONNECTED, remainder); 703 break; 704 705 case SCAN_RESULTS: 706 mStateMachine.sendMessage(SCAN_RESULTS_EVENT); 707 break; 708 709 case UNKNOWN: 710 break; 711 } 712 } 713 714 private void handleWpsFailEvent(String dataString) { 715 final Pattern p = Pattern.compile(WPS_FAIL_PATTERN); 716 Matcher match = p.matcher(dataString); 717 if (match.find()) { 718 String cfgErr = match.group(1); 719 String reason = match.group(2); 720 721 if (reason != null) { 722 switch(Integer.parseInt(reason)) { 723 case REASON_TKIP_ONLY_PROHIBITED: 724 mStateMachine.sendMessage(mStateMachine.obtainMessage(WPS_FAIL_EVENT, 725 WifiManager.WPS_TKIP_ONLY_PROHIBITED, 0)); 726 return; 727 case REASON_WEP_PROHIBITED: 728 mStateMachine.sendMessage(mStateMachine.obtainMessage(WPS_FAIL_EVENT, 729 WifiManager.WPS_WEP_PROHIBITED, 0)); 730 return; 731 } 732 } 733 if (cfgErr != null) { 734 switch(Integer.parseInt(cfgErr)) { 735 case CONFIG_AUTH_FAILURE: 736 mStateMachine.sendMessage(mStateMachine.obtainMessage(WPS_FAIL_EVENT, 737 WifiManager.WPS_AUTH_FAILURE, 0)); 738 return; 739 case CONFIG_MULTIPLE_PBC_DETECTED: 740 mStateMachine.sendMessage(mStateMachine.obtainMessage(WPS_FAIL_EVENT, 741 WifiManager.WPS_OVERLAP_ERROR, 0)); 742 return; 743 } 744 } 745 } 746 //For all other errors, return a generic internal error 747 mStateMachine.sendMessage(mStateMachine.obtainMessage(WPS_FAIL_EVENT, 748 WifiManager.ERROR, 0)); 749 } 750 751 /* <event> status=<err> and the special case of <event> reason=FREQ_CONFLICT */ 752 private P2pStatus p2pError(String dataString) { 753 P2pStatus err = P2pStatus.UNKNOWN; 754 String[] tokens = dataString.split(" "); 755 if (tokens.length < 2) return err; 756 String[] nameValue = tokens[1].split("="); 757 if (nameValue.length != 2) return err; 758 759 /* Handle the special case of reason=FREQ+CONFLICT */ 760 if (nameValue[1].equals("FREQ_CONFLICT")) { 761 return P2pStatus.NO_COMMON_CHANNEL; 762 } 763 try { 764 err = P2pStatus.valueOf(Integer.parseInt(nameValue[1])); 765 } catch (NumberFormatException e) { 766 e.printStackTrace(); 767 } 768 return err; 769 } 770 771 /** 772 * Handle p2p events 773 */ 774 private void handleP2pEvents(String dataString) { 775 if (dataString.startsWith(P2P_DEVICE_FOUND_STR)) { 776 mStateMachine.sendMessage(P2P_DEVICE_FOUND_EVENT, new WifiP2pDevice(dataString)); 777 } else if (dataString.startsWith(P2P_DEVICE_LOST_STR)) { 778 mStateMachine.sendMessage(P2P_DEVICE_LOST_EVENT, new WifiP2pDevice(dataString)); 779 } else if (dataString.startsWith(P2P_FIND_STOPPED_STR)) { 780 mStateMachine.sendMessage(P2P_FIND_STOPPED_EVENT); 781 } else if (dataString.startsWith(P2P_GO_NEG_REQUEST_STR)) { 782 mStateMachine.sendMessage(P2P_GO_NEGOTIATION_REQUEST_EVENT, 783 new WifiP2pConfig(dataString)); 784 } else if (dataString.startsWith(P2P_GO_NEG_SUCCESS_STR)) { 785 mStateMachine.sendMessage(P2P_GO_NEGOTIATION_SUCCESS_EVENT); 786 } else if (dataString.startsWith(P2P_GO_NEG_FAILURE_STR)) { 787 mStateMachine.sendMessage(P2P_GO_NEGOTIATION_FAILURE_EVENT, p2pError(dataString)); 788 } else if (dataString.startsWith(P2P_GROUP_FORMATION_SUCCESS_STR)) { 789 mStateMachine.sendMessage(P2P_GROUP_FORMATION_SUCCESS_EVENT); 790 } else if (dataString.startsWith(P2P_GROUP_FORMATION_FAILURE_STR)) { 791 mStateMachine.sendMessage(P2P_GROUP_FORMATION_FAILURE_EVENT, p2pError(dataString)); 792 } else if (dataString.startsWith(P2P_GROUP_STARTED_STR)) { 793 mStateMachine.sendMessage(P2P_GROUP_STARTED_EVENT, new WifiP2pGroup(dataString)); 794 } else if (dataString.startsWith(P2P_GROUP_REMOVED_STR)) { 795 mStateMachine.sendMessage(P2P_GROUP_REMOVED_EVENT, new WifiP2pGroup(dataString)); 796 } else if (dataString.startsWith(P2P_INVITATION_RECEIVED_STR)) { 797 mStateMachine.sendMessage(P2P_INVITATION_RECEIVED_EVENT, 798 new WifiP2pGroup(dataString)); 799 } else if (dataString.startsWith(P2P_INVITATION_RESULT_STR)) { 800 mStateMachine.sendMessage(P2P_INVITATION_RESULT_EVENT, p2pError(dataString)); 801 } else if (dataString.startsWith(P2P_PROV_DISC_PBC_REQ_STR)) { 802 mStateMachine.sendMessage(P2P_PROV_DISC_PBC_REQ_EVENT, 803 new WifiP2pProvDiscEvent(dataString)); 804 } else if (dataString.startsWith(P2P_PROV_DISC_PBC_RSP_STR)) { 805 mStateMachine.sendMessage(P2P_PROV_DISC_PBC_RSP_EVENT, 806 new WifiP2pProvDiscEvent(dataString)); 807 } else if (dataString.startsWith(P2P_PROV_DISC_ENTER_PIN_STR)) { 808 mStateMachine.sendMessage(P2P_PROV_DISC_ENTER_PIN_EVENT, 809 new WifiP2pProvDiscEvent(dataString)); 810 } else if (dataString.startsWith(P2P_PROV_DISC_SHOW_PIN_STR)) { 811 mStateMachine.sendMessage(P2P_PROV_DISC_SHOW_PIN_EVENT, 812 new WifiP2pProvDiscEvent(dataString)); 813 } else if (dataString.startsWith(P2P_PROV_DISC_FAILURE_STR)) { 814 mStateMachine.sendMessage(P2P_PROV_DISC_FAILURE_EVENT); 815 } else if (dataString.startsWith(P2P_SERV_DISC_RESP_STR)) { 816 List<WifiP2pServiceResponse> list = WifiP2pServiceResponse.newInstance(dataString); 817 if (list != null) { 818 mStateMachine.sendMessage(P2P_SERV_DISC_RESP_EVENT, list); 819 } else { 820 Log.e(TAG, "Null service resp " + dataString); 821 } 822 } 823 } 824 825 /** 826 * Handle hostap events 827 */ 828 private void handleHostApEvents(String dataString) { 829 String[] tokens = dataString.split(" "); 830 /* AP-STA-CONNECTED 42:fc:89:a8:96:09 p2p_dev_addr=02:90:4c:a0:92:54 */ 831 if (tokens[0].equals(AP_STA_CONNECTED_STR)) { 832 mStateMachine.sendMessage(AP_STA_CONNECTED_EVENT, new WifiP2pDevice(dataString)); 833 /* AP-STA-DISCONNECTED 42:fc:89:a8:96:09 p2p_dev_addr=02:90:4c:a0:92:54 */ 834 } else if (tokens[0].equals(AP_STA_DISCONNECTED_STR)) { 835 mStateMachine.sendMessage(AP_STA_DISCONNECTED_EVENT, new WifiP2pDevice(dataString)); 836 } 837 } 838 839 /** 840 * Handle the supplicant STATE-CHANGE event 841 * @param dataString New supplicant state string in the format: 842 * id=network-id state=new-state 843 */ 844 private void handleSupplicantStateChange(String dataString) { 845 WifiSsid wifiSsid = null; 846 int index = dataString.lastIndexOf("SSID="); 847 if (index != -1) { 848 wifiSsid = WifiSsid.createFromAsciiEncoded( 849 dataString.substring(index + 5)); 850 } 851 String[] dataTokens = dataString.split(" "); 852 853 String BSSID = null; 854 int networkId = -1; 855 int newState = -1; 856 for (String token : dataTokens) { 857 String[] nameValue = token.split("="); 858 if (nameValue.length != 2) { 859 continue; 860 } 861 862 if (nameValue[0].equals("BSSID")) { 863 BSSID = nameValue[1]; 864 continue; 865 } 866 867 int value; 868 try { 869 value = Integer.parseInt(nameValue[1]); 870 } catch (NumberFormatException e) { 871 continue; 872 } 873 874 if (nameValue[0].equals("id")) { 875 networkId = value; 876 } else if (nameValue[0].equals("state")) { 877 newState = value; 878 } 879 } 880 881 if (newState == -1) return; 882 883 SupplicantState newSupplicantState = SupplicantState.INVALID; 884 for (SupplicantState state : SupplicantState.values()) { 885 if (state.ordinal() == newState) { 886 newSupplicantState = state; 887 break; 888 } 889 } 890 if (newSupplicantState == SupplicantState.INVALID) { 891 Log.w(TAG, "Invalid supplicant state: " + newState); 892 } 893 notifySupplicantStateChange(networkId, wifiSsid, BSSID, newSupplicantState); 894 } 895 896 private void handleNetworkStateChange(NetworkInfo.DetailedState newState, String data) { 897 String BSSID = null; 898 int networkId = -1; 899 if (newState == NetworkInfo.DetailedState.CONNECTED) { 900 Matcher match = mConnectedEventPattern.matcher(data); 901 if (!match.find()) { 902 if (DBG) Log.d(TAG, "Could not find BSSID in CONNECTED event string"); 903 } else { 904 BSSID = match.group(1); 905 try { 906 networkId = Integer.parseInt(match.group(2)); 907 } catch (NumberFormatException e) { 908 networkId = -1; 909 } 910 } 911 notifyNetworkStateChange(newState, BSSID, networkId); 912 } 913 } 914 915 /** 916 * Send the state machine a notification that the state of Wifi connectivity 917 * has changed. 918 * @param networkId the configured network on which the state change occurred 919 * @param newState the new network state 920 * @param BSSID when the new state is {@link DetailedState#CONNECTED 921 * NetworkInfo.DetailedState.CONNECTED}, 922 * this is the MAC address of the access point. Otherwise, it 923 * is {@code null}. 924 */ 925 void notifyNetworkStateChange(NetworkInfo.DetailedState newState, String BSSID, int netId) { 926 if (newState == NetworkInfo.DetailedState.CONNECTED) { 927 Message m = mStateMachine.obtainMessage(NETWORK_CONNECTION_EVENT, 928 netId, 0, BSSID); 929 mStateMachine.sendMessage(m); 930 } else { 931 Message m = mStateMachine.obtainMessage(NETWORK_DISCONNECTION_EVENT, 932 netId, 0, BSSID); 933 mStateMachine.sendMessage(m); 934 } 935 } 936 937 /** 938 * Send the state machine a notification that the state of the supplicant 939 * has changed. 940 * @param networkId the configured network on which the state change occurred 941 * @param wifiSsid network name 942 * @param BSSID network address 943 * @param newState the new {@code SupplicantState} 944 */ 945 void notifySupplicantStateChange(int networkId, WifiSsid wifiSsid, String BSSID, 946 SupplicantState newState) { 947 mStateMachine.sendMessage(mStateMachine.obtainMessage(SUPPLICANT_STATE_CHANGE_EVENT, 948 new StateChangeResult(networkId, wifiSsid, BSSID, newState))); 949 } 950 } 951 } 952
