vcs.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 state_change(struct connman_element *device,
 186                                                 enum supplicant_state state)
 187 {
 188         struct wifi_data *data = connman_element_get_data(device);
 189         struct connman_element *element;
 190
 191         DBG("state %d", state);
 192
 193         if ((state == STATE_INACTIVE || state == STATE_DISCONNECTED) &&
 194                                                 data->inactive_timer == 0)
 195                 data->inactive_timer = g_timeout_add_seconds(INACTIVE_TIMEOUT,
 196                                                         inactive_scan, device);
 197
 198         if (data == NULL)
 199                 return;
 200
 201         if (data->identifier == NULL)
 202                 return;
 203
 204         element = find_current_element(data, data->identifier);
 205         if (element == NULL)
 206                 return;
 207
 208         if (state == STATE_COMPLETED) {
 209                 struct connman_element *dhcp;
 210
 211                 data->connected = TRUE;
 212
 213                 dhcp = connman_element_create(NULL);
 214
 215                 dhcp->type = CONNMAN_ELEMENT_TYPE_DHCP;
 216                 dhcp->index = element->index;
 217
 218                 connman_element_register(dhcp, element);
 219         } else if (state == STATE_DISCONNECTED || state == STATE_INACTIVE)
 220                 data->connected = FALSE;
 221 }
 222
 223 static gboolean cleanup_pending(gpointer user_data)
 224 {
 225         struct wifi_data *data = user_data;
 226         GSList *list;
 227
 228         DBG("");
 229
 230         for (list = data->pending; list; list = list->next) {
 231                 struct connman_element *element = list->data;
 232
 233                 DBG("element %p name %s", element, element->name);
 234
 235                 connman_element_unregister(element);
 236                 connman_element_unref(element);
 237         }
 238
 239         g_slist_free(data->pending);
 240         data->pending = NULL;
 241
 242         data->cleanup_timer = 0;
 243
 244         return FALSE;
 245 }
 246
 247 static void clear_results(struct connman_element *device)
 248 {
 249         struct wifi_data *data = connman_element_get_data(device);
 250
 251         DBG("pending %d", g_slist_length(data->pending));
 252         DBG("current %d", g_slist_length(data->current));
 253
 254         data->pending = data->current;
 255         data->current = NULL;
 256
 257         if (data->cleanup_timer > 0)
 258                 return;
 259
 260         data->cleanup_timer = g_timeout_add_seconds(CLEANUP_TIMEOUT,
 261                                                         cleanup_pending, data);
 262 }
 263
 264 static void scan_result(struct connman_element *device,
 265                                         struct supplicant_network *network)
 266 {
 267         struct wifi_data *data = connman_element_get_data(device);
 268         struct connman_element *element;
 269         gchar *temp;
 270         int i;
 271
 272         DBG("network %p identifier %s", network, network->identifier);
 273
 274         if (data == NULL)
 275                 return;
 276
 277         if (network->identifier == NULL)
 278                 return;
 279
 280         if (network->identifier[0] == '\0')
 281                 return;
 282
 283         temp = g_strdup(network->identifier);
 284
 285         for (i = 0; i < strlen(temp); i++) {
 286                 gchar tmp = g_ascii_tolower(temp[i]);
 287
 288                 if (tmp < 'a' || tmp > 'z')
 289                         temp[i] = '_';
 290         }
 291
 292         element = find_pending_element(data, network->identifier);
 293         if (element == NULL) {
 294                 guint8 strength;
 295
 296                 element = connman_element_create(temp);
 297
 298                 element->type = CONNMAN_ELEMENT_TYPE_NETWORK;
 299                 element->index = device->index;
 300
 301                 connman_element_add_static_property(element, "Name",
 302                                 DBUS_TYPE_STRING, &network->identifier);
 303
 304                 connman_element_add_static_array_property(element, "WiFi.SSID",
 305                         DBUS_TYPE_BYTE, &network->ssid, network->ssid_len);
 306
 307                 if (element->wifi.security == NULL) {
 308                         const char *security;
 309
 310                         if (network->has_rsn == TRUE)
 311                                 security = "wpa2";
 312                         else if (network->has_wpa == TRUE)
 313                                 security = "wpa";
 314                         else if (network->has_wep == TRUE)
 315                                 security = "wep";
 316                         else
 317                                 security = "none";
 318
 319                         element->wifi.security = g_strdup(security);
 320                 }
 321
 322                 strength = network->quality;
 323
 324                 connman_element_add_static_property(element, "WiFi.Strength",
 325                                                 DBUS_TYPE_BYTE, &strength);
 326
 327                 //connman_element_add_static_property(element, "WiFi.Noise",
 328                 //                      DBUS_TYPE_INT32, &network->noise);
 329
 330                 DBG("%s (%s) strength %d", network->identifier,
 331                                         element->wifi.security, strength);
 332
 333                 connman_element_register(element, device);
 334         } else
 335                 data->pending = g_slist_remove(data->pending, element);
 336
 337         data->current = g_slist_append(data->current, element);
 338
 339         element->available = TRUE;
 340
 341         g_free(temp);
 342 }
 343
 344 static struct supplicant_callback wifi_callback = {
 345         .state_change   = state_change,
 346         .clear_results  = clear_results,
 347         .scan_result    = scan_result,
 348 };
 349
 350 static int wifi_probe(struct connman_element *element)
 351 {
 352         struct wifi_data *data;
 353
 354         DBG("element %p name %s", element, element->name);
 355
 356         data = g_try_new0(struct wifi_data, 1);
 357         if (data == NULL)
 358                 return -ENOMEM;
 359
 360         data->connected = FALSE;
 361
 362         connman_element_set_data(element, data);
 363
 364         return 0;
 365 }
 366
 367 static void wifi_remove(struct connman_element *element)
 368 {
 369         struct wifi_data *data = connman_element_get_data(element);
 370
 371         DBG("element %p name %s", element, element->name);
 372
 373         connman_element_set_data(element, NULL);
 374
 375         g_free(data->identifier);
 376         g_free(data);
 377 }
 378
 379 static int wifi_update(struct connman_element *element)
 380 {
 381         DBG("element %p name %s", element, element->name);
 382
 383         __supplicant_scan(element);
 384
 385         return 0;
 386 }
 387
 388 static int wifi_enable(struct connman_element *element)
 389 {
 390         int err;
 391
 392         DBG("element %p name %s", element, element->name);
 393
 394         err = __supplicant_start(element, &wifi_callback);
 395         if (err < 0)
 396                 return err;
 397
 398         __supplicant_scan(element);
 399
 400         return 0;
 401 }
 402
 403 static int wifi_disable(struct connman_element *element)
 404 {
 405         struct wifi_data *data = connman_element_get_data(element);
 406         GSList *list;
 407
 408         DBG("element %p name %s", element, element->name);
 409
 410         if (data->cleanup_timer > 0) {
 411                 g_source_remove(data->cleanup_timer);
 412                 data->cleanup_timer = 0;
 413         }
 414
 415         if (data->inactive_timer > 0) {
 416                 g_source_remove(data->inactive_timer);
 417                 data->inactive_timer = 0;
 418         }
 419
 420         __supplicant_disconnect(element);
 421
 422         for (list = data->pending; list; list = list->next) {
 423                 struct connman_element *network = list->data;
 424
 425                 connman_element_unref(network);
 426         }
 427
 428         g_slist_free(data->pending);
 429         data->pending = NULL;
 430
 431         for (list = data->current; list; list = list->next) {
 432                 struct connman_element *network = list->data;
 433
 434                 connman_element_unref(network);
 435         }
 436
 437         g_slist_free(data->current);
 438         data->current = NULL;
 439
 440         connman_element_unregister_children(element);
 441
 442         __supplicant_stop(element);
 443
 444         return 0;
 445 }
 446
 447 static struct connman_driver wifi_driver = {
 448         .name           = "wifi-device",
 449         .type           = CONNMAN_ELEMENT_TYPE_DEVICE,
 450         .subtype        = CONNMAN_ELEMENT_SUBTYPE_WIFI,
 451         .probe          = wifi_probe,
 452         .remove         = wifi_remove,
 453         .update         = wifi_update,
 454         .enable         = wifi_enable,
 455         .disable        = wifi_disable,
 456 };
 457
 458 static GSList *device_list = NULL;
 459
 460 static void wifi_newlink(unsigned short type, int index,
 461                                         unsigned flags, unsigned change)
 462 {
 463         struct connman_element *device;
 464         GSList *list;
 465         gboolean exists = FALSE;
 466         gchar *name, *devname;
 467         struct iwreq iwr;
 468         int sk;
 469
 470         DBG("index %d", index);
 471
 472         if (type != ARPHRD_ETHER)
 473                 return;
 474
 475         name = inet_index2ident(index, "dev_");
 476         devname = inet_index2name(index);
 477
 478         memset(&iwr, 0, sizeof(iwr));
 479         strncpy(iwr.ifr_ifrn.ifrn_name, devname, IFNAMSIZ);
 480
 481         sk = socket(PF_INET, SOCK_DGRAM, 0);
 482
 483         if (ioctl(sk, SIOCGIWNAME, &iwr) < 0) {
 484                 g_free(name);
 485                 close(sk);
 486                 return;
 487         }
 488
 489         close(sk);
 490
 491         for (list = device_list; list; list = list->next) {
 492                 struct connman_element *device = list->data;
 493
 494                 if (device->index == index) {
 495                         exists = TRUE;
 496                         break;
 497                 }
 498         }
 499
 500         if (exists == TRUE) {
 501                 g_free(name);
 502                 return;
 503         }
 504
 505         device = connman_element_create(NULL);
 506         device->type = CONNMAN_ELEMENT_TYPE_DEVICE;
 507         device->subtype = CONNMAN_ELEMENT_SUBTYPE_WIFI;
 508
 509         device->index = index;
 510         device->name = name;
 511         device->devname = devname;
 512
 513         connman_element_register(device, NULL);
 514         device_list = g_slist_append(device_list, device);
 515 }
 516
 517 static void wifi_dellink(unsigned short type, int index,
 518                                         unsigned flags, unsigned change)
 519 {
 520         GSList *list;
 521
 522         DBG("index %d", index);
 523
 524         for (list = device_list; list; list = list->next) {
 525                 struct connman_element *device = list->data;
 526
 527                 if (device->index == index) {
 528                         device_list = g_slist_remove(device_list, device);
 529                         connman_element_unregister(device);
 530                         connman_element_unref(device);
 531                         break;
 532                 }
 533         }
 534 }
 535
 536 static struct connman_rtnl wifi_rtnl = {
 537         .name           = "wifi",
 538         .newlink        = wifi_newlink,
 539         .dellink        = wifi_dellink,
 540 };
 541
 542 static void supplicant_connect(DBusConnection *connection, void *user_data)
 543 {
 544         DBG("connection %p", connection);
 545
 546         __supplicant_init(connection);
 547
 548         if (connman_rtnl_register(&wifi_rtnl) < 0)
 549                 return;
 550
 551         connman_rtnl_send_getlink();
 552 }
 553
 554 static void supplicant_disconnect(DBusConnection *connection, void *user_data)
 555 {
 556         GSList *list;
 557
 558         DBG("connection %p", connection);
 559
 560         connman_rtnl_unregister(&wifi_rtnl);
 561
 562         for (list = device_list; list; list = list->next) {
 563                 struct connman_element *device = list->data;
 564
 565                 connman_element_unregister(device);
 566                 connman_element_unref(device);
 567         }
 568
 569         g_slist_free(device_list);
 570         device_list = NULL;
 571
 572         __supplicant_exit();
 573 }
 574
 575 static DBusConnection *connection;
 576 static guint watch;
 577
 578 static int wifi_init(void)
 579 {
 580         int err;
 581
 582         connection = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
 583         if (connection == NULL)
 584                 return -EIO;
 585
 586         err = connman_driver_register(&network_driver);
 587         if (err < 0) {
 588                 dbus_connection_unref(connection);
 589                 return err;
 590         }
 591
 592         err = connman_driver_register(&wifi_driver);
 593         if (err < 0) {
 594                 connman_driver_unregister(&network_driver);
 595                 dbus_connection_unref(connection);
 596                 return err;
 597         }
 598
 599         watch = g_dbus_add_service_watch(connection, SUPPLICANT_NAME,
 600                         supplicant_connect, supplicant_disconnect, NULL, NULL);
 601
 602         if (g_dbus_check_service(connection, SUPPLICANT_NAME) == TRUE)
 603                 supplicant_connect(connection, NULL);
 604
 605         return 0;
 606 }
 607
 608 static void wifi_exit(void)
 609 {
 610         connman_driver_unregister(&network_driver);
 611         connman_driver_unregister(&wifi_driver);
 612
 613         if (watch > 0)
 614                 g_dbus_remove_watch(connection, watch);
 615
 616         supplicant_disconnect(connection, NULL);
 617
 618         dbus_connection_unref(connection);
 619 }
 620
 621 CONNMAN_PLUGIN_DEFINE(wifi, "WiFi interface plugin", VERSION,
 622                                                         wifi_init, wifi_exit)