plugins/wifi.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2009  Intel Corporation. All rights reserved.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <unistd.h>
  28 #include <string.h>
  29 #include <sys/ioctl.h>
  30 #include <sys/socket.h>
  31 #include <linux/if_arp.h>
  32 #include <linux/wireless.h>
  33
  34 #include <gdbus.h>
  35
  36 #define CONNMAN_API_SUBJECT_TO_CHANGE
  37 #include <connman/plugin.h>
  38 #include <connman/driver.h>
  39 #include <connman/dbus.h>
  40 #include <connman/log.h>
  41
  42 #include "inet.h"
  43 #include "supplicant.h"
  44
  45 #define CLEANUP_TIMEOUT   8     /* in seconds */
  46 #define INACTIVE_TIMEOUT  12    /* in seconds */
  47
  48 struct wifi_data {
  49         GSList *current;
  50         GSList *pending;
  51         guint cleanup_timer;
  52         guint inactive_timer;
  53         gchar *identifier;
  54         gboolean connected;
  55 };
  56
  57 static int network_probe(struct connman_element *element)
  58 {
  59         DBG("element %p name %s", element, element->name);
  60
  61         return 0;
  62 }
  63
  64 static void network_remove(struct connman_element *element)
  65 {
  66         DBG("element %p name %s", element, element->name);
  67 }
  68
  69 static int network_enable(struct connman_element *element)
  70 {
  71         struct connman_device *device = (struct connman_device *) element->parent;
  72         char *name, *security = NULL, *passphrase = NULL;
  73         unsigned char *ssid;
  74         int ssid_len;
  75
  76         DBG("element %p name %s", element, element->name);
  77
  78         if (connman_element_get_static_property(element,
  79                                                 "Name", &name) == FALSE)
  80                 return -EIO;
  81
  82         if (connman_element_get_static_array_property(element,
  83                                 "WiFi.SSID", &ssid, &ssid_len) == FALSE)
  84                 return -EIO;
  85
  86         if (device != NULL) {
  87                 struct wifi_data *data = connman_device_get_data(device);
  88
  89                 if (data != NULL) {
  90                         if (data->connected == TRUE)
  91                                 return -EBUSY;
  92
  93                         g_free(data->identifier);
  94                         data->identifier = g_strdup(name);
  95                 }
  96         }
  97
  98         connman_element_get_value(element,
  99                         CONNMAN_PROPERTY_ID_WIFI_SECURITY, &security);
 100
 101         connman_element_get_value(element,
 102                         CONNMAN_PROPERTY_ID_WIFI_PASSPHRASE, &passphrase);
 103
 104         DBG("name %s security %s passhprase %s",
 105                                         name, security, passphrase);
 106
 107         if (__supplicant_connect(element, ssid, ssid_len,
 108                                                 security, passphrase) < 0)
 109                 connman_error("Failed to initiate connect");
 110
 111         return 0;
 112 }
 113
 114 static int network_disable(struct connman_element *element)
 115 {
 116         DBG("element %p name %s", element, element->name);
 117
 118         connman_element_unregister_children(element);
 119
 120         __supplicant_disconnect(element);
 121
 122         return 0;
 123 }
 124
 125 static struct connman_driver network_driver = {
 126         .name           = "wifi-network",
 127         .type           = CONNMAN_ELEMENT_TYPE_NETWORK,
 128         .subtype        = CONNMAN_ELEMENT_SUBTYPE_WIFI,
 129         .probe          = network_probe,
 130         .remove         = network_remove,
 131         .enable         = network_enable,
 132         .disable        = network_disable,
 133 };
 134
 135 static struct connman_element *find_current_element(struct wifi_data *data,
 136                                                         const char *identifier)
 137 {
 138         GSList *list;
 139
 140         for (list = data->current; list; list = list->next) {
 141                 struct connman_element *element = list->data;
 142
 143                 if (connman_element_match_static_property(element,
 144                                                 "Name", &identifier) == TRUE)
 145                         return element;
 146         }
 147
 148         return NULL;
 149 }
 150
 151 static struct connman_element *find_pending_element(struct wifi_data *data,
 152                                                         const char *identifier)
 153 {
 154         GSList *list;
 155
 156         for (list = data->pending; list; list = list->next) {
 157                 struct connman_element *element = list->data;
 158
 159                 if (connman_element_match_static_property(element,
 160                                                 "Name", &identifier) == TRUE)
 161                         return element;
 162         }
 163
 164         return NULL;
 165 }
 166
 167 static gboolean inactive_scan(gpointer user_data)
 168 {
 169         struct connman_device *device = user_data;
 170         struct wifi_data *data = connman_device_get_data(device);
 171
 172         DBG("device %p", device);
 173
 174         __supplicant_scan(device);
 175
 176         data->inactive_timer = 0;
 177
 178         return FALSE;
 179 }
 180
 181 static void connect_known_networks(struct connman_device *device)
 182 {
 183         struct wifi_data *data = connman_device_get_data(device);
 184         GSList *list;
 185
 186         DBG("device %p", device);
 187
 188         if (data->inactive_timer > 0) {
 189                 g_source_remove(data->inactive_timer);
 190                 data->inactive_timer = 0;
 191         }
 192
 193         for (list = data->current; list; list = list->next) {
 194                 struct connman_element *element = list->data;
 195
 196                 if (element->policy == CONNMAN_ELEMENT_POLICY_AUTO &&
 197                                                 element->remember == TRUE &&
 198                                                 element->available == TRUE) {
 199                         if (network_enable(element) == 0)
 200                                 return;
 201                 }
 202         }
 203
 204         data->inactive_timer = g_timeout_add_seconds(INACTIVE_TIMEOUT,
 205                                                         inactive_scan, device);
 206 }
 207
 208 static void state_change(struct connman_device *device,
 209                                                 enum supplicant_state state)
 210 {
 211         struct wifi_data *data = connman_device_get_data(device);
 212         struct connman_element *element;
 213
 214         DBG("device %p state %d", device, state);
 215
 216         if (state == STATE_SCANNING)
 217                 connman_device_set_scanning(device, TRUE);
 218         else
 219                 connman_device_set_scanning(device, FALSE);
 220
 221         if (data == NULL)
 222                 return;
 223
 224         DBG("identifier %s", data->identifier);
 225
 226         if (data->identifier == NULL)
 227                 goto reconnect;
 228
 229         element = find_current_element(data, data->identifier);
 230         if (element == NULL)
 231                 goto reconnect;
 232
 233         if (state == STATE_COMPLETED && data->connected == FALSE) {
 234                 struct connman_element *dhcp;
 235
 236                 data->connected = TRUE;
 237                 connman_element_set_enabled(element, TRUE);
 238
 239                 dhcp = connman_element_create(NULL);
 240
 241                 dhcp->type = CONNMAN_ELEMENT_TYPE_DHCP;
 242                 dhcp->index = element->index;
 243
 244                 if (connman_element_register(dhcp, element) < 0)
 245                         connman_element_unref(dhcp);
 246         } else if (state == STATE_INACTIVE || state == STATE_DISCONNECTED) {
 247                 data->connected = FALSE;
 248                 connman_element_set_enabled(element, FALSE);
 249
 250                 connman_element_unregister_children(element);
 251         }
 252
 253 reconnect:
 254         if (state == STATE_INACTIVE) {
 255                 data->connected = FALSE;
 256                 connect_known_networks(device);
 257         }
 258 }
 259
 260 static gboolean cleanup_pending(gpointer user_data)
 261 {
 262         struct wifi_data *data = user_data;
 263         GSList *list;
 264
 265         DBG("");
 266
 267         for (list = data->pending; list; list = list->next) {
 268                 struct connman_element *element = list->data;
 269
 270                 DBG("element %p name %s", element, element->name);
 271
 272                 connman_element_unregister(element);
 273                 connman_element_unref(element);
 274         }
 275
 276         g_slist_free(data->pending);
 277         data->pending = NULL;
 278
 279         data->cleanup_timer = 0;
 280
 281         return FALSE;
 282 }
 283
 284 static void clear_results(struct connman_device *device)
 285 {
 286         struct wifi_data *data = connman_device_get_data(device);
 287
 288         DBG("pending %d", g_slist_length(data->pending));
 289         DBG("current %d", g_slist_length(data->current));
 290
 291         if (data->cleanup_timer > 0) {
 292                 g_source_remove(data->cleanup_timer);
 293                 cleanup_pending(data);
 294         }
 295
 296         data->pending = data->current;
 297         data->current = NULL;
 298
 299         data->cleanup_timer = g_timeout_add_seconds(CLEANUP_TIMEOUT,
 300                                                         cleanup_pending, data);
 301 }
 302
 303 static void scan_result(struct connman_device *device,
 304                                         struct supplicant_network *network)
 305 {
 306         struct wifi_data *data = connman_device_get_data(device);
 307         struct connman_element *element;
 308         gchar *temp;
 309         unsigned int i;
 310
 311         DBG("device %p identifier %s", device, network->identifier);
 312
 313         if (data == NULL)
 314                 return;
 315
 316         if (network->identifier == NULL)
 317                 return;
 318
 319         if (network->identifier[0] == '\0')
 320                 return;
 321
 322         temp = g_strdup(network->identifier);
 323
 324         for (i = 0; i < strlen(temp); i++) {
 325                 char tmp = temp[i];
 326                 if ((tmp < '0' || tmp > '9') && (tmp < 'A' || tmp > 'Z') &&
 327                                                 (tmp < 'a' || tmp > 'z'))
 328                         temp[i] = '_';
 329         }
 330
 331         element = find_pending_element(data, network->identifier);
 332         if (element == NULL) {
 333                 const char *mode;
 334
 335                 element = connman_element_create(temp);
 336
 337                 element->type    = CONNMAN_ELEMENT_TYPE_NETWORK;
 338                 element->subtype = CONNMAN_ELEMENT_SUBTYPE_WIFI;
 339                 element->index   = connman_device_get_index(device);
 340
 341                 connman_element_add_static_property(element, "Name",
 342                                 DBUS_TYPE_STRING, &network->identifier);
 343
 344                 connman_element_add_static_array_property(element, "WiFi.SSID",
 345                         DBUS_TYPE_BYTE, &network->ssid, network->ssid_len);
 346
 347                 mode = (network->adhoc == TRUE) ? "adhoc" : "managed";
 348                 connman_element_add_static_property(element, "WiFi.Mode",
 349                                                 DBUS_TYPE_STRING, &mode);
 350
 351                 if (element->wifi.security == NULL) {
 352                         const char *security;
 353
 354                         if (network->has_rsn == TRUE)
 355                                 security = "wpa2";
 356                         else if (network->has_wpa == TRUE)
 357                                 security = "wpa";
 358                         else if (network->has_wep == TRUE)
 359                                 security = "wep";
 360                         else
 361                                 security = "none";
 362
 363                         element->wifi.security = g_strdup(security);
 364                 }
 365
 366                 element->strength = network->quality;
 367
 368                 connman_element_add_static_property(element, "Strength",
 369                                         DBUS_TYPE_BYTE, &element->strength);
 370
 371                 DBG("%s (%s %s) strength %d", network->identifier, mode,
 372                                 element->wifi.security, element->strength);
 373
 374                 if (connman_element_register(element,
 375                                 (struct connman_element *) device) < 0) {
 376                         connman_element_unref(element);
 377                         goto done;
 378                 }
 379         } else {
 380                 data->pending = g_slist_remove(data->pending, element);
 381
 382                 if (element->strength != network->quality) {
 383                         element->strength = network->quality;
 384
 385                         connman_element_set_static_property(element, "Strength",
 386                                         DBUS_TYPE_BYTE, &element->strength);
 387
 388                         connman_element_update(element);
 389                 }
 390         }
 391
 392         data->current = g_slist_append(data->current, element);
 393
 394         element->available = TRUE;
 395
 396 done:
 397         g_free(temp);
 398 }
 399
 400 static struct supplicant_callback wifi_callback = {
 401         .state_change   = state_change,
 402         .clear_results  = clear_results,
 403         .scan_result    = scan_result,
 404 };
 405
 406 static int wifi_probe(struct connman_device *device)
 407 {
 408         struct wifi_data *data;
 409
 410         DBG("device %p", device);
 411
 412         data = g_try_new0(struct wifi_data, 1);
 413         if (data == NULL)
 414                 return -ENOMEM;
 415
 416         data->connected = FALSE;
 417
 418         connman_device_set_data(device, data);
 419
 420         return 0;
 421 }
 422
 423 static void wifi_remove(struct connman_device *device)
 424 {
 425         struct wifi_data *data = connman_device_get_data(device);
 426
 427         DBG("device %p", device);
 428
 429         connman_device_set_data(device, NULL);
 430
 431         g_free(data->identifier);
 432         g_free(data);
 433 }
 434
 435 static int wifi_enable(struct connman_device *device)
 436 {
 437         int err;
 438
 439         DBG("device %p", device);
 440
 441         err = __supplicant_start(device, &wifi_callback);
 442         if (err < 0)
 443                 return err;
 444
 445         connman_device_set_powered(device, TRUE);
 446
 447         __supplicant_scan(device);
 448
 449         return 0;
 450 }
 451
 452 static int wifi_disable(struct connman_device *device)
 453 {
 454         struct wifi_data *data = connman_device_get_data(device);
 455         GSList *list;
 456
 457         DBG("device %p", device);
 458
 459         if (data->cleanup_timer > 0) {
 460                 g_source_remove(data->cleanup_timer);
 461                 cleanup_pending(data);
 462         }
 463
 464         if (data->inactive_timer > 0) {
 465                 g_source_remove(data->inactive_timer);
 466                 data->inactive_timer = 0;
 467         }
 468
 469         for (list = data->current; list; list = list->next) {
 470                 struct connman_element *network = list->data;
 471
 472                 if (network->enabled == TRUE)
 473                         __supplicant_disconnect(network);
 474
 475                 connman_element_unref(network);
 476         }
 477
 478         g_slist_free(data->current);
 479         data->current = NULL;
 480
 481         connman_element_unregister_children((struct connman_element *) device);
 482
 483         __supplicant_stop(device);
 484
 485         connman_device_set_powered(device, FALSE);
 486
 487         return 0;
 488 }
 489
 490 static int wifi_scan(struct connman_device *device)
 491 {
 492         DBG("device %p", device);
 493
 494         __supplicant_scan(device);
 495
 496         return 0;
 497 }
 498
 499 static struct connman_device_driver wifi_driver = {
 500         .name           = "wifi",
 501         .type           = CONNMAN_DEVICE_TYPE_WIFI,
 502         .probe          = wifi_probe,
 503         .remove         = wifi_remove,
 504         .enable         = wifi_enable,
 505         .disable        = wifi_disable,
 506         .scan           = wifi_scan,
 507 };
 508
 509 static void supplicant_connect(DBusConnection *connection, void *user_data)
 510 {
 511         DBG("connection %p", connection);
 512
 513         __supplicant_init(connection);
 514
 515         connman_device_driver_register(&wifi_driver);
 516 }
 517
 518 static void supplicant_disconnect(DBusConnection *connection, void *user_data)
 519 {
 520         DBG("connection %p", connection);
 521
 522         connman_device_driver_unregister(&wifi_driver);
 523
 524         __supplicant_exit();
 525 }
 526
 527 static DBusConnection *connection;
 528 static guint watch;
 529
 530 static int wifi_init(void)
 531 {
 532         int err;
 533
 534         connection = connman_dbus_get_connection();
 535         if (connection == NULL)
 536                 return -EIO;
 537
 538         err = connman_driver_register(&network_driver);
 539         if (err < 0) {
 540                 dbus_connection_unref(connection);
 541                 return err;
 542         }
 543
 544         watch = g_dbus_add_service_watch(connection, SUPPLICANT_NAME,
 545                         supplicant_connect, supplicant_disconnect, NULL, NULL);
 546
 547         if (g_dbus_check_service(connection, SUPPLICANT_NAME) == TRUE)
 548                 supplicant_connect(connection, NULL);
 549         else
 550                 __supplicant_activate(connection);
 551
 552         return 0;
 553 }
 554
 555 static void wifi_exit(void)
 556 {
 557         connman_driver_unregister(&network_driver);
 558
 559         if (watch > 0)
 560                 g_dbus_remove_watch(connection, watch);
 561
 562         supplicant_disconnect(connection, NULL);
 563
 564         dbus_connection_unref(connection);
 565 }
 566
 567 CONNMAN_PLUGIN_DEFINE(wifi, "WiFi interface plugin", VERSION,
 568                                                         wifi_init, wifi_exit)