git.maemo.org Git - connman/blob - 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                                                 element->available == TRUE) {
 203                         if (network_enable(element) == 0)
 204                                 return;
 205                 }
 206         }
 207
 208         data->inactive_timer = g_timeout_add_seconds(INACTIVE_TIMEOUT,
 209                                                         inactive_scan, device);
 210 }
 211
 212 static void state_change(struct connman_element *device,
 213                                                 enum supplicant_state state)
 214 {
 215         struct wifi_data *data = connman_element_get_data(device);
 216         struct connman_element *element;
 217
 218         DBG("state %d", state);
 219
 220         if (data == NULL)
 221                 return;
 222
 223         if (data->identifier == NULL)
 224                 goto reconnect;
 225
 226         element = find_current_element(data, data->identifier);
 227         if (element == NULL)
 228                 goto reconnect;
 229
 230         if (state == STATE_COMPLETED) {
 231                 struct connman_element *dhcp;
 232
 233                 data->connected = TRUE;
 234                 connman_element_set_enabled(element, TRUE);
 235
 236                 dhcp = connman_element_create(NULL);
 237
 238                 dhcp->type = CONNMAN_ELEMENT_TYPE_DHCP;
 239                 dhcp->index = element->index;
 240
 241                 connman_element_register(dhcp, element);
 242         } else if (state == STATE_INACTIVE || state == STATE_DISCONNECTED) {
 243                 data->connected = FALSE;
 244                 connman_element_set_enabled(element, FALSE);
 245
 246                 connman_element_unregister_children(element);
 247         }
 248
 249 reconnect:
 250         if (state == STATE_INACTIVE || state == STATE_DISCONNECTED) {
 251                 data->connected = FALSE;
 252                 connect_known_networks(device);
 253         }
 254 }
 255
 256 static gboolean cleanup_pending(gpointer user_data)
 257 {
 258         struct wifi_data *data = user_data;
 259         GSList *list;
 260
 261         DBG("");
 262
 263         for (list = data->pending; list; list = list->next) {
 264                 struct connman_element *element = list->data;
 265
 266                 DBG("element %p name %s", element, element->name);
 267
 268                 connman_element_unregister(element);
 269                 connman_element_unref(element);
 270         }
 271
 272         g_slist_free(data->pending);
 273         data->pending = NULL;
 274
 275         data->cleanup_timer = 0;
 276
 277         return FALSE;
 278 }
 279
 280 static void clear_results(struct connman_element *device)
 281 {
 282         struct wifi_data *data = connman_element_get_data(device);
 283
 284         DBG("pending %d", g_slist_length(data->pending));
 285         DBG("current %d", g_slist_length(data->current));
 286
 287         data->pending = data->current;
 288         data->current = NULL;
 289
 290         if (data->cleanup_timer > 0)
 291                 return;
 292
 293         data->cleanup_timer = g_timeout_add_seconds(CLEANUP_TIMEOUT,
 294                                                         cleanup_pending, data);
 295 }
 296
 297 static void scan_result(struct connman_element *device,
 298                                         struct supplicant_network *network)
 299 {
 300         struct wifi_data *data = connman_element_get_data(device);
 301         struct connman_element *element;
 302         gchar *temp;
 303         int i;
 304
 305         DBG("network %p identifier %s", network, network->identifier);
 306
 307         if (data == NULL)
 308                 return;
 309
 310         if (network->identifier == NULL)
 311                 return;
 312
 313         if (network->identifier[0] == '\0')
 314                 return;
 315
 316         temp = g_strdup(network->identifier);
 317
 318         for (i = 0; i < strlen(temp); i++) {
 319                 gchar tmp = g_ascii_tolower(temp[i]);
 320
 321                 if (tmp < 'a' || tmp > 'z')
 322                         temp[i] = '_';
 323         }
 324
 325         element = find_pending_element(data, network->identifier);
 326         if (element == NULL) {
 327                 element = connman_element_create(temp);
 328
 329                 element->type = CONNMAN_ELEMENT_TYPE_NETWORK;
 330                 element->index = device->index;
 331
 332                 connman_element_add_static_property(element, "Name",
 333                                 DBUS_TYPE_STRING, &network->identifier);
 334
 335                 connman_element_add_static_array_property(element, "WiFi.SSID",
 336                         DBUS_TYPE_BYTE, &network->ssid, network->ssid_len);
 337
 338                 if (element->wifi.security == NULL) {
 339                         const char *security;
 340
 341                         if (network->has_rsn == TRUE)
 342                                 security = "wpa2";
 343                         else if (network->has_wpa == TRUE)
 344                                 security = "wpa";
 345                         else if (network->has_wep == TRUE)
 346                                 security = "wep";
 347                         else
 348                                 security = "none";
 349
 350                         element->wifi.security = g_strdup(security);
 351                 }
 352
 353                 element->strength = network->quality;
 354
 355                 connman_element_add_static_property(element, "Strength",
 356                                         DBUS_TYPE_BYTE, &element->strength);
 357
 358                 DBG("%s (%s) strength %d", network->identifier,
 359                                 element->wifi.security, element->strength);
 360
 361                 connman_element_register(element, device);
 362         } else {
 363                 data->pending = g_slist_remove(data->pending, element);
 364
 365                 element->strength = network->quality;
 366
 367                 connman_element_set_static_property(element, "Strength",
 368                                         DBUS_TYPE_BYTE, &element->strength);
 369
 370                 connman_element_update(element);
 371         }
 372
 373         data->current = g_slist_append(data->current, element);
 374
 375         element->available = TRUE;
 376
 377         g_free(temp);
 378 }
 379
 380 static struct supplicant_callback wifi_callback = {
 381         .state_change   = state_change,
 382         .clear_results  = clear_results,
 383         .scan_result    = scan_result,
 384 };
 385
 386 static int wifi_probe(struct connman_element *element)
 387 {
 388         struct wifi_data *data;
 389
 390         DBG("element %p name %s", element, element->name);
 391
 392         data = g_try_new0(struct wifi_data, 1);
 393         if (data == NULL)
 394                 return -ENOMEM;
 395
 396         data->connected = FALSE;
 397
 398         connman_element_set_data(element, data);
 399
 400         return 0;
 401 }
 402
 403 static void wifi_remove(struct connman_element *element)
 404 {
 405         struct wifi_data *data = connman_element_get_data(element);
 406
 407         DBG("element %p name %s", element, element->name);
 408
 409         connman_element_set_data(element, NULL);
 410
 411         g_free(data->identifier);
 412         g_free(data);
 413 }
 414
 415 static int wifi_update(struct connman_element *element)
 416 {
 417         DBG("element %p name %s", element, element->name);
 418
 419         __supplicant_scan(element);
 420
 421         return 0;
 422 }
 423
 424 static int wifi_enable(struct connman_element *element)
 425 {
 426         int err;
 427
 428         DBG("element %p name %s", element, element->name);
 429
 430         err = __supplicant_start(element, &wifi_callback);
 431         if (err < 0)
 432                 return err;
 433
 434         __supplicant_scan(element);
 435
 436         return 0;
 437 }
 438
 439 static int wifi_disable(struct connman_element *element)
 440 {
 441         struct wifi_data *data = connman_element_get_data(element);
 442         GSList *list;
 443
 444         DBG("element %p name %s", element, element->name);
 445
 446         if (data->cleanup_timer > 0) {
 447                 g_source_remove(data->cleanup_timer);
 448                 data->cleanup_timer = 0;
 449         }
 450
 451         if (data->inactive_timer > 0) {
 452                 g_source_remove(data->inactive_timer);
 453                 data->inactive_timer = 0;
 454         }
 455
 456         __supplicant_disconnect(element);
 457
 458         for (list = data->pending; list; list = list->next) {
 459                 struct connman_element *network = list->data;
 460
 461                 connman_element_unref(network);
 462         }
 463
 464         g_slist_free(data->pending);
 465         data->pending = NULL;
 466
 467         for (list = data->current; list; list = list->next) {
 468                 struct connman_element *network = list->data;
 469
 470                 connman_element_unref(network);
 471         }
 472
 473         g_slist_free(data->current);
 474         data->current = NULL;
 475
 476         connman_element_unregister_children(element);
 477
 478         __supplicant_stop(element);
 479
 480         return 0;
 481 }
 482
 483 static struct connman_driver wifi_driver = {
 484         .name           = "wifi-device",
 485         .type           = CONNMAN_ELEMENT_TYPE_DEVICE,
 486         .subtype        = CONNMAN_ELEMENT_SUBTYPE_WIFI,
 487         .probe          = wifi_probe,
 488         .remove         = wifi_remove,
 489         .update         = wifi_update,
 490         .enable         = wifi_enable,
 491         .disable        = wifi_disable,
 492 };
 493
 494 static GSList *device_list = NULL;
 495
 496 static void wifi_newlink(unsigned short type, int index,
 497                                         unsigned flags, unsigned change)
 498 {
 499         struct connman_element *device;
 500         GSList *list;
 501         gboolean exists = FALSE;
 502         gchar *name, *devname;
 503         struct iwreq iwr;
 504         int sk;
 505
 506         DBG("index %d", index);
 507
 508         if (type != ARPHRD_ETHER)
 509                 return;
 510
 511         name = inet_index2ident(index, "dev_");
 512         devname = inet_index2name(index);
 513
 514         memset(&iwr, 0, sizeof(iwr));
 515         strncpy(iwr.ifr_ifrn.ifrn_name, devname, IFNAMSIZ);
 516
 517         sk = socket(PF_INET, SOCK_DGRAM, 0);
 518
 519         if (ioctl(sk, SIOCGIWNAME, &iwr) < 0) {
 520                 g_free(name);
 521                 close(sk);
 522                 return;
 523         }
 524
 525         close(sk);
 526
 527         for (list = device_list; list; list = list->next) {
 528                 struct connman_element *device = list->data;
 529
 530                 if (device->index == index) {
 531                         exists = TRUE;
 532                         break;
 533                 }
 534         }
 535
 536         if (exists == TRUE) {
 537                 g_free(name);
 538                 return;
 539         }
 540
 541         device = connman_element_create(NULL);
 542         device->type = CONNMAN_ELEMENT_TYPE_DEVICE;
 543         device->subtype = CONNMAN_ELEMENT_SUBTYPE_WIFI;
 544
 545         device->index = index;
 546         device->name = name;
 547         device->devname = devname;
 548
 549         connman_element_register(device, NULL);
 550         device_list = g_slist_append(device_list, device);
 551 }
 552
 553 static void wifi_dellink(unsigned short type, int index,
 554                                         unsigned flags, unsigned change)
 555 {
 556         GSList *list;
 557
 558         DBG("index %d", index);
 559
 560         for (list = device_list; list; list = list->next) {
 561                 struct connman_element *device = list->data;
 562
 563                 if (device->index == index) {
 564                         device_list = g_slist_remove(device_list, device);
 565                         connman_element_unregister(device);
 566                         connman_element_unref(device);
 567                         break;
 568                 }
 569         }
 570 }
 571
 572 static struct connman_rtnl wifi_rtnl = {
 573         .name           = "wifi",
 574         .newlink        = wifi_newlink,
 575         .dellink        = wifi_dellink,
 576 };
 577
 578 static void supplicant_connect(DBusConnection *connection, void *user_data)
 579 {
 580         DBG("connection %p", connection);
 581
 582         __supplicant_init(connection);
 583
 584         if (connman_rtnl_register(&wifi_rtnl) < 0)
 585                 return;
 586
 587         connman_rtnl_send_getlink();
 588 }
 589
 590 static void supplicant_disconnect(DBusConnection *connection, void *user_data)
 591 {
 592         GSList *list;
 593
 594         DBG("connection %p", connection);
 595
 596         connman_rtnl_unregister(&wifi_rtnl);
 597
 598         for (list = device_list; list; list = list->next) {
 599                 struct connman_element *device = list->data;
 600
 601                 connman_element_unregister(device);
 602                 connman_element_unref(device);
 603         }
 604
 605         g_slist_free(device_list);
 606         device_list = NULL;
 607
 608         __supplicant_exit();
 609 }
 610
 611 static DBusConnection *connection;
 612 static guint watch;
 613
 614 static int wifi_init(void)
 615 {
 616         int err;
 617
 618         connection = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
 619         if (connection == NULL)
 620                 return -EIO;
 621
 622         err = connman_driver_register(&network_driver);
 623         if (err < 0) {
 624                 dbus_connection_unref(connection);
 625                 return err;
 626         }
 627
 628         err = connman_driver_register(&wifi_driver);
 629         if (err < 0) {
 630                 connman_driver_unregister(&network_driver);
 631                 dbus_connection_unref(connection);
 632                 return err;
 633         }
 634
 635         watch = g_dbus_add_service_watch(connection, SUPPLICANT_NAME,
 636                         supplicant_connect, supplicant_disconnect, NULL, NULL);
 637
 638         if (g_dbus_check_service(connection, SUPPLICANT_NAME) == TRUE)
 639                 supplicant_connect(connection, NULL);
 640
 641         return 0;
 642 }
 643
 644 static void wifi_exit(void)
 645 {
 646         connman_driver_unregister(&network_driver);
 647         connman_driver_unregister(&wifi_driver);
 648
 649         if (watch > 0)
 650                 g_dbus_remove_watch(connection, watch);
 651
 652         supplicant_disconnect(connection, NULL);
 653
 654         dbus_connection_unref(connection);
 655 }
 656
 657 CONNMAN_PLUGIN_DEFINE(wifi, "WiFi interface plugin", VERSION,
 658                                                         wifi_init, wifi_exit)