plugins/wifi.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2008  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 #include <connman/plugin.h>
  37 #include <connman/driver.h>
  38 #include <connman/rtnl.h>
  39 #include <connman/log.h>
  40
  41 #include "inet.h"
  42 #include "supplicant.h"
  43
  44 #define CLEANUP_TIMEOUT   8     /* in seconds */
  45 #define INACTIVE_TIMEOUT  12    /* in seconds */
  46
  47 struct wifi_data {
  48         GSList *current;
  49         GSList *pending;
  50         guint cleanup_timer;
  51         guint inactive_timer;
  52         gchar *identifier;
  53         gboolean connected;
  54 };
  55
  56 static int network_probe(struct connman_element *element)
  57 {
  58         DBG("element %p name %s", element, element->name);
  59
  60         return 0;
  61 }
  62
  63 static void network_remove(struct connman_element *element)
  64 {
  65         DBG("element %p name %s", element, element->name);
  66 }
  67
  68 static int network_enable(struct connman_element *element)
  69 {
  70         struct connman_element *device = element->parent;
  71         char *name, *security = NULL, *passphrase = NULL;
  72         unsigned char *ssid;
  73         int ssid_len;
  74
  75         DBG("element %p name %s", element, element->name);
  76
  77         if (connman_element_get_static_property(element,
  78                                                 "Name", &name) == FALSE)
  79                 return -EIO;
  80
  81         if (connman_element_get_static_array_property(element,
  82                                 "WiFi.SSID", &ssid, &ssid_len) == FALSE)
  83                 return -EIO;
  84
  85         if (device != NULL) {
  86                 struct wifi_data *data = connman_element_get_data(device);
  87
  88                 if (data != NULL) {
  89                         if (data->connected == TRUE)
  90                                 return -EBUSY;
  91
  92                         g_free(data->identifier);
  93                         data->identifier = g_strdup(name);
  94                 }
  95         }
  96
  97         connman_element_get_value(element,
  98                         CONNMAN_PROPERTY_ID_WIFI_SECURITY, &security);
  99
 100         connman_element_get_value(element,
 101                         CONNMAN_PROPERTY_ID_WIFI_PASSPHRASE, &passphrase);
 102
 103         DBG("name %s security %s passhprase %s",
 104                                         name, security, passphrase);
 105
 106         if (__supplicant_connect(element, ssid, ssid_len,
 107                                                 security, passphrase) < 0)
 108                 connman_error("Failed to initiate connect");
 109
 110         return 0;
 111 }
 112
 113 static int network_disable(struct connman_element *element)
 114 {
 115         DBG("element %p name %s", element, element->name);
 116
 117         connman_element_unregister_children(element);
 118
 119         __supplicant_disconnect(element);
 120
 121         return 0;
 122 }
 123
 124 static struct connman_driver network_driver = {
 125         .name           = "wifi-network",
 126         .type           = CONNMAN_ELEMENT_TYPE_NETWORK,
 127         .subtype        = CONNMAN_ELEMENT_SUBTYPE_WIFI,
 128         .probe          = network_probe,
 129         .remove         = network_remove,
 130         .enable         = network_enable,
 131         .disable        = network_disable,
 132 };
 133
 134 static struct connman_element *find_current_element(struct wifi_data *data,
 135                                                         const char *identifier)
 136 {
 137         GSList *list;
 138
 139         for (list = data->current; list; list = list->next) {
 140                 struct connman_element *element = list->data;
 141
 142                 if (connman_element_match_static_property(element,
 143                                         "Name", &identifier) == TRUE)
 144                         return element;
 145         }
 146
 147         return NULL;
 148 }
 149
 150 static struct connman_element *find_pending_element(struct wifi_data *data,
 151                                                         const char *identifier)
 152 {
 153         GSList *list;
 154
 155         for (list = data->pending; list; list = list->next) {
 156                 struct connman_element *element = list->data;
 157
 158                 if (connman_element_match_static_property(element,
 159                                         "Name", &identifier) == TRUE)
 160                         return element;
 161         }
 162
 163         return NULL;
 164 }
 165
 166 static gboolean inactive_scan(gpointer user_data)
 167 {
 168         struct connman_element *device = user_data;
 169         struct wifi_data *data = connman_element_get_data(device);
 170
 171         DBG("");
 172
 173         if (data->cleanup_timer > 0) {
 174                 g_source_remove(data->cleanup_timer);
 175                 data->cleanup_timer = 0;
 176         }
 177
 178         __supplicant_scan(device);
 179
 180         data->inactive_timer = 0;
 181
 182         return FALSE;
 183 }
 184
 185 static void connect_known_networks(struct connman_element *device)
 186 {
 187         struct wifi_data *data = connman_element_get_data(device);
 188         GSList *list;
 189
 190         DBG("");
 191
 192         if (data->inactive_timer > 0) {
 193                 g_source_remove(data->inactive_timer);
 194                 data->inactive_timer = 0;
 195         }
 196
 197         for (list = data->current; list; list = list->next) {
 198                 struct connman_element *element = list->data;
 199
 200                 if (element->policy == CONNMAN_ELEMENT_POLICY_AUTO &&
 201                                                 element->remember == TRUE) {
 202                         if (network_enable(element) == 0)
 203                                 return;
 204                 }
 205         }
 206
 207         data->inactive_timer = g_timeout_add_seconds(INACTIVE_TIMEOUT,
 208                                                         inactive_scan, device);
 209 }
 210
 211 static void state_change(struct connman_element *device,
 212                                                 enum supplicant_state state)
 213 {
 214         struct wifi_data *data = connman_element_get_data(device);
 215         struct connman_element *element;
 216
 217         DBG("state %d", state);
 218
 219         if (data == NULL)
 220                 return;
 221
 222         if (data->identifier == NULL)
 223                 goto reconnect;
 224
 225         element = find_current_element(data, data->identifier);
 226         if (element == NULL)
 227                 goto reconnect;
 228
 229         if (state == STATE_COMPLETED) {
 230                 struct connman_element *dhcp;
 231
 232                 data->connected = TRUE;
 233                 connman_element_set_enabled(element, TRUE);
 234
 235                 dhcp = connman_element_create(NULL);
 236
 237                 dhcp->type = CONNMAN_ELEMENT_TYPE_DHCP;
 238                 dhcp->index = element->index;
 239
 240                 connman_element_register(dhcp, element);
 241         } else if (state == STATE_INACTIVE || state == STATE_DISCONNECTED) {
 242                 data->connected = FALSE;
 243                 connman_element_set_enabled(element, FALSE);
 244
 245                 connman_element_unregister_children(element);
 246         }
 247
 248 reconnect:
 249         if (state == STATE_INACTIVE || state == STATE_DISCONNECTED) {
 250                 data->connected = FALSE;
 251                 connect_known_networks(device);
 252         }
 253 }
 254
 255 static gboolean cleanup_pending(gpointer user_data)
 256 {
 257         struct wifi_data *data = user_data;
 258         GSList *list;
 259
 260         DBG("");
 261
 262         for (list = data->pending; list; list = list->next) {
 263                 struct connman_element *element = list->data;
 264
 265                 DBG("element %p name %s", element, element->name);
 266
 267                 connman_element_unregister(element);
 268                 connman_element_unref(element);
 269         }
 270
 271         g_slist_free(data->pending);
 272         data->pending = NULL;
 273
 274         data->cleanup_timer = 0;
 275
 276         return FALSE;
 277 }
 278
 279 static void clear_results(struct connman_element *device)
 280 {
 281         struct wifi_data *data = connman_element_get_data(device);
 282
 283         DBG("pending %d", g_slist_length(data->pending));
 284         DBG("current %d", g_slist_length(data->current));
 285
 286         data->pending = data->current;
 287         data->current = NULL;
 288
 289         if (data->cleanup_timer > 0)
 290                 return;
 291
 292         data->cleanup_timer = g_timeout_add_seconds(CLEANUP_TIMEOUT,
 293                                                         cleanup_pending, data);
 294 }
 295
 296 static void scan_result(struct connman_element *device,
 297                                         struct supplicant_network *network)
 298 {
 299         struct wifi_data *data = connman_element_get_data(device);
 300         struct connman_element *element;
 301         gchar *temp;
 302         int i;
 303
 304         DBG("network %p identifier %s", network, network->identifier);
 305
 306         if (data == NULL)
 307                 return;
 308
 309         if (network->identifier == NULL)
 310                 return;
 311
 312         if (network->identifier[0] == '\0')
 313                 return;
 314
 315         temp = g_strdup(network->identifier);
 316
 317         for (i = 0; i < strlen(temp); i++) {
 318                 gchar tmp = g_ascii_tolower(temp[i]);
 319
 320                 if (tmp < 'a' || tmp > 'z')
 321                         temp[i] = '_';
 322         }
 323
 324         element = find_pending_element(data, network->identifier);
 325         if (element == NULL) {
 326                 guint8 strength;
 327
 328                 element = connman_element_create(temp);
 329
 330                 element->type = CONNMAN_ELEMENT_TYPE_NETWORK;
 331                 element->index = device->index;
 332
 333                 connman_element_add_static_property(element, "Name",
 334                                 DBUS_TYPE_STRING, &network->identifier);
 335
 336                 connman_element_add_static_array_property(element, "WiFi.SSID",
 337                         DBUS_TYPE_BYTE, &network->ssid, network->ssid_len);
 338
 339                 if (element->wifi.security == NULL) {
 340                         const char *security;
 341
 342                         if (network->has_rsn == TRUE)
 343                                 security = "wpa2";
 344                         else if (network->has_wpa == TRUE)
 345                                 security = "wpa";
 346                         else if (network->has_wep == TRUE)
 347                                 security = "wep";
 348                         else
 349                                 security = "none";
 350
 351                         element->wifi.security = g_strdup(security);
 352                 }
 353
 354                 strength = network->quality;
 355
 356                 connman_element_add_static_property(element, "WiFi.Strength",
 357                                                 DBUS_TYPE_BYTE, &strength);
 358
 359                 //connman_element_add_static_property(element, "WiFi.Noise",
 360                 //                      DBUS_TYPE_INT32, &network->noise);
 361
 362                 DBG("%s (%s) strength %d", network->identifier,
 363                                         element->wifi.security, strength);
 364
 365                 connman_element_register(element, device);
 366         } else
 367                 data->pending = g_slist_remove(data->pending, element);
 368
 369         data->current = g_slist_append(data->current, element);
 370
 371         element->available = TRUE;
 372
 373         g_free(temp);
 374 }
 375
 376 static struct supplicant_callback wifi_callback = {
 377         .state_change   = state_change,
 378         .clear_results  = clear_results,
 379         .scan_result    = scan_result,
 380 };
 381
 382 static int wifi_probe(struct connman_element *element)
 383 {
 384         struct wifi_data *data;
 385
 386         DBG("element %p name %s", element, element->name);
 387
 388         data = g_try_new0(struct wifi_data, 1);
 389         if (data == NULL)
 390                 return -ENOMEM;
 391
 392         data->connected = FALSE;
 393
 394         connman_element_set_data(element, data);
 395
 396         return 0;
 397 }
 398
 399 static void wifi_remove(struct connman_element *element)
 400 {
 401         struct wifi_data *data = connman_element_get_data(element);
 402
 403         DBG("element %p name %s", element, element->name);
 404
 405         connman_element_set_data(element, NULL);
 406
 407         g_free(data->identifier);
 408         g_free(data);
 409 }
 410
 411 static int wifi_update(struct connman_element *element)
 412 {
 413         DBG("element %p name %s", element, element->name);
 414
 415         __supplicant_scan(element);
 416
 417         return 0;
 418 }
 419
 420 static int wifi_enable(struct connman_element *element)
 421 {
 422         int err;
 423
 424         DBG("element %p name %s", element, element->name);
 425
 426         err = __supplicant_start(element, &wifi_callback);
 427         if (err < 0)
 428                 return err;
 429
 430         __supplicant_scan(element);
 431
 432         return 0;
 433 }
 434
 435 static int wifi_disable(struct connman_element *element)
 436 {
 437         struct wifi_data *data = connman_element_get_data(element);
 438         GSList *list;
 439
 440         DBG("element %p name %s", element, element->name);
 441
 442         if (data->cleanup_timer > 0) {
 443                 g_source_remove(data->cleanup_timer);
 444                 data->cleanup_timer = 0;
 445         }
 446
 447         if (data->inactive_timer > 0) {
 448                 g_source_remove(data->inactive_timer);
 449                 data->inactive_timer = 0;
 450         }
 451
 452         __supplicant_disconnect(element);
 453
 454         for (list = data->pending; list; list = list->next) {
 455                 struct connman_element *network = list->data;
 456
 457                 connman_element_unref(network);
 458         }
 459
 460         g_slist_free(data->pending);
 461         data->pending = NULL;
 462
 463         for (list = data->current; list; list = list->next) {
 464                 struct connman_element *network = list->data;
 465
 466                 connman_element_unref(network);
 467         }
 468
 469         g_slist_free(data->current);
 470         data->current = NULL;
 471
 472         connman_element_unregister_children(element);
 473
 474         __supplicant_stop(element);
 475
 476         return 0;
 477 }
 478
 479 static struct connman_driver wifi_driver = {
 480         .name           = "wifi-device",
 481         .type           = CONNMAN_ELEMENT_TYPE_DEVICE,
 482         .subtype        = CONNMAN_ELEMENT_SUBTYPE_WIFI,
 483         .probe          = wifi_probe,
 484         .remove         = wifi_remove,
 485         .update         = wifi_update,
 486         .enable         = wifi_enable,
 487         .disable        = wifi_disable,
 488 };
 489
 490 static GSList *device_list = NULL;
 491
 492 static void wifi_newlink(unsigned short type, int index,
 493                                         unsigned flags, unsigned change)
 494 {
 495         struct connman_element *device;
 496         GSList *list;
 497         gboolean exists = FALSE;
 498         gchar *name, *devname;
 499         struct iwreq iwr;
 500         int sk;
 501
 502         DBG("index %d", index);
 503
 504         if (type != ARPHRD_ETHER)
 505                 return;
 506
 507         name = inet_index2ident(index, "dev_");
 508         devname = inet_index2name(index);
 509
 510         memset(&iwr, 0, sizeof(iwr));
 511         strncpy(iwr.ifr_ifrn.ifrn_name, devname, IFNAMSIZ);
 512
 513         sk = socket(PF_INET, SOCK_DGRAM, 0);
 514
 515         if (ioctl(sk, SIOCGIWNAME, &iwr) < 0) {
 516                 g_free(name);
 517                 close(sk);
 518                 return;
 519         }
 520
 521         close(sk);
 522
 523         for (list = device_list; list; list = list->next) {
 524                 struct connman_element *device = list->data;
 525
 526                 if (device->index == index) {
 527                         exists = TRUE;
 528                         break;
 529                 }
 530         }
 531
 532         if (exists == TRUE) {
 533                 g_free(name);
 534                 return;
 535         }
 536
 537         device = connman_element_create(NULL);
 538         device->type = CONNMAN_ELEMENT_TYPE_DEVICE;
 539         device->subtype = CONNMAN_ELEMENT_SUBTYPE_WIFI;
 540
 541         device->index = index;
 542         device->name = name;
 543         device->devname = devname;
 544
 545         connman_element_register(device, NULL);
 546         device_list = g_slist_append(device_list, device);
 547 }
 548
 549 static void wifi_dellink(unsigned short type, int index,
 550                                         unsigned flags, unsigned change)
 551 {
 552         GSList *list;
 553
 554         DBG("index %d", index);
 555
 556         for (list = device_list; list; list = list->next) {
 557                 struct connman_element *device = list->data;
 558
 559                 if (device->index == index) {
 560                         device_list = g_slist_remove(device_list, device);
 561                         connman_element_unregister(device);
 562                         connman_element_unref(device);
 563                         break;
 564                 }
 565         }
 566 }
 567
 568 static struct connman_rtnl wifi_rtnl = {
 569         .name           = "wifi",
 570         .newlink        = wifi_newlink,
 571         .dellink        = wifi_dellink,
 572 };
 573
 574 static void supplicant_connect(DBusConnection *connection, void *user_data)
 575 {
 576         DBG("connection %p", connection);
 577
 578         __supplicant_init(connection);
 579
 580         if (connman_rtnl_register(&wifi_rtnl) < 0)
 581                 return;
 582
 583         connman_rtnl_send_getlink();
 584 }
 585
 586 static void supplicant_disconnect(DBusConnection *connection, void *user_data)
 587 {
 588         GSList *list;
 589
 590         DBG("connection %p", connection);
 591
 592         connman_rtnl_unregister(&wifi_rtnl);
 593
 594         for (list = device_list; list; list = list->next) {
 595                 struct connman_element *device = list->data;
 596
 597                 connman_element_unregister(device);
 598                 connman_element_unref(device);
 599         }
 600
 601         g_slist_free(device_list);
 602         device_list = NULL;
 603
 604         __supplicant_exit();
 605 }
 606
 607 static DBusConnection *connection;
 608 static guint watch;
 609
 610 static int wifi_init(void)
 611 {
 612         int err;
 613
 614         connection = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
 615         if (connection == NULL)
 616                 return -EIO;
 617
 618         err = connman_driver_register(&network_driver);
 619         if (err < 0) {
 620                 dbus_connection_unref(connection);
 621                 return err;
 622         }
 623
 624         err = connman_driver_register(&wifi_driver);
 625         if (err < 0) {
 626                 connman_driver_unregister(&network_driver);
 627                 dbus_connection_unref(connection);
 628                 return err;
 629         }
 630
 631         watch = g_dbus_add_service_watch(connection, SUPPLICANT_NAME,
 632                         supplicant_connect, supplicant_disconnect, NULL, NULL);
 633
 634         if (g_dbus_check_service(connection, SUPPLICANT_NAME) == TRUE)
 635                 supplicant_connect(connection, NULL);
 636
 637         return 0;
 638 }
 639
 640 static void wifi_exit(void)
 641 {
 642         connman_driver_unregister(&network_driver);
 643         connman_driver_unregister(&wifi_driver);
 644
 645         if (watch > 0)
 646                 g_dbus_remove_watch(connection, watch);
 647
 648         supplicant_disconnect(connection, NULL);
 649
 650         dbus_connection_unref(connection);
 651 }
 652
 653 CONNMAN_PLUGIN_DEFINE(wifi, "WiFi interface plugin", VERSION,
 654                                                         wifi_init, wifi_exit)