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 struct wifi_data {
  45         GStaticMutex mutex;
  46         GSList *list;
  47         gchar *identifier;
  48 };
  49
  50 static int network_probe(struct connman_element *element)
  51 {
  52         DBG("element %p name %s", element, element->name);
  53
  54         return 0;
  55 }
  56
  57 static void network_remove(struct connman_element *element)
  58 {
  59         DBG("element %p name %s", element, element->name);
  60 }
  61
  62 static int network_enable(struct connman_element *element)
  63 {
  64         char *identifier, *passphrase = NULL;
  65         unsigned char *ssid;
  66         int ssid_len;
  67
  68         DBG("element %p name %s", element, element->name);
  69
  70         if (connman_element_get_static_property(element,
  71                                         "WiFi.Name", &identifier) == FALSE)
  72                 return -EIO;
  73
  74         if (connman_element_get_static_array_property(element,
  75                                 "WiFi.SSID", &ssid, &ssid_len) == FALSE)
  76                 return -EIO;
  77
  78         if (element->parent != NULL) {
  79                 struct wifi_data *data = connman_element_get_data(element->parent);
  80
  81                 if (data != NULL) {
  82                         g_free(data->identifier);
  83                         data->identifier = g_strdup(identifier);
  84                 }
  85         }
  86
  87         connman_element_get_value(element,
  88                         CONNMAN_PROPERTY_ID_WIFI_PASSPHRASE, &passphrase);
  89
  90         DBG("identifier %s passhprase %s", identifier, passphrase);
  91
  92         if (__supplicant_connect(element, ssid, ssid_len, passphrase) < 0)
  93                 connman_error("Failed to initiate connect");
  94
  95         return 0;
  96 }
  97
  98 static int network_disable(struct connman_element *element)
  99 {
 100         DBG("element %p name %s", element, element->name);
 101
 102         connman_element_unregister_children(element);
 103
 104         __supplicant_disconnect(element);
 105
 106         return 0;
 107 }
 108
 109 static struct connman_driver network_driver = {
 110         .name           = "wifi-network",
 111         .type           = CONNMAN_ELEMENT_TYPE_NETWORK,
 112         .subtype        = CONNMAN_ELEMENT_SUBTYPE_WIFI,
 113         .probe          = network_probe,
 114         .remove         = network_remove,
 115         .enable         = network_enable,
 116         .disable        = network_disable,
 117 };
 118
 119 static struct connman_element *find_element(struct wifi_data *data,
 120                                                 const char *identifier)
 121 {
 122         GSList *list;
 123
 124         for (list = data->list; list; list = list->next) {
 125                 struct connman_element *element = list->data;
 126
 127                 if (connman_element_match_static_property(element,
 128                                         "WiFi.Name", &identifier) == TRUE)
 129                         return element;
 130         }
 131
 132         return NULL;
 133 }
 134
 135 static void state_change(struct connman_element *parent,
 136                                                 enum supplicant_state state)
 137 {
 138         struct wifi_data *data = connman_element_get_data(parent);
 139         struct connman_element *element;
 140
 141         DBG("state %d", state);
 142
 143         if (data->identifier == NULL)
 144                 return;
 145
 146         element = find_element(data, data->identifier);
 147         if (element == NULL)
 148                 return;
 149
 150         if (state == STATE_COMPLETED) {
 151                 struct connman_element *dhcp;
 152
 153                 dhcp = connman_element_create(NULL);
 154
 155                 dhcp->type = CONNMAN_ELEMENT_TYPE_DHCP;
 156                 dhcp->index = element->index;
 157
 158                 connman_element_register(dhcp, element);
 159         }
 160 }
 161
 162 static void scan_result(struct connman_element *parent,
 163                                         struct supplicant_network *network)
 164 {
 165         struct wifi_data *data = connman_element_get_data(parent);
 166         struct connman_element *element;
 167         gchar *temp;
 168         int i;
 169
 170         DBG("network %p identifier %s", network, network->identifier);
 171
 172         if (data == NULL)
 173                 return;
 174
 175         if (network->identifier == NULL)
 176                 return;
 177
 178         if (network->identifier[0] == '\0')
 179                 return;
 180
 181         temp = g_strdup(network->identifier);
 182
 183         for (i = 0; i < strlen(temp); i++) {
 184                 if (temp[i] == ' ' || temp[i] == '.' || temp[i] == '-')
 185                         temp[i] = '_';
 186                 if (temp[i] == '(' || temp[i] == ')')
 187                         temp[i] = '_';
 188                 if (g_ascii_isprint(temp[i]) == FALSE)
 189                         temp[i] = '_';
 190                 temp[i] = g_ascii_tolower(temp[i]);
 191         }
 192
 193         g_static_mutex_lock(&data->mutex);
 194
 195         element = find_element(data, network->identifier);
 196         if (element == NULL) {
 197                 element = connman_element_create(temp);
 198
 199                 element->type = CONNMAN_ELEMENT_TYPE_NETWORK;
 200                 element->index = parent->index;
 201
 202                 data->list = g_slist_append(data->list, element);
 203
 204                 connman_element_add_static_property(element, "WiFi.Name",
 205                                 DBUS_TYPE_STRING, &network->identifier);
 206
 207                 connman_element_add_static_array_property(element, "WiFi.SSID",
 208                         DBUS_TYPE_BYTE, &network->ssid, network->ssid_len);
 209
 210                 connman_element_register(element, parent);
 211         }
 212
 213         g_static_mutex_unlock(&data->mutex);
 214
 215         g_free(temp);
 216 }
 217
 218 static struct supplicant_callback wifi_callback = {
 219         .state_change   = state_change,
 220         .scan_result    = scan_result,
 221 };
 222
 223 static int wifi_probe(struct connman_element *element)
 224 {
 225         struct wifi_data *data;
 226
 227         DBG("element %p name %s", element, element->name);
 228
 229         data = g_try_new0(struct wifi_data, 1);
 230         if (data == NULL)
 231                 return -ENOMEM;
 232
 233         g_static_mutex_init(&data->mutex);
 234
 235         connman_element_set_data(element, data);
 236
 237         return 0;
 238 }
 239
 240 static void wifi_remove(struct connman_element *element)
 241 {
 242         struct wifi_data *data = connman_element_get_data(element);
 243
 244         DBG("element %p name %s", element, element->name);
 245
 246         connman_element_set_data(element, NULL);
 247
 248         g_free(data->identifier);
 249         g_free(data);
 250 }
 251
 252 static int wifi_update(struct connman_element *element)
 253 {
 254         DBG("element %p name %s", element, element->name);
 255
 256         __supplicant_scan(element);
 257
 258         return 0;
 259 }
 260
 261 static int wifi_enable(struct connman_element *element)
 262 {
 263         int err;
 264
 265         DBG("element %p name %s", element, element->name);
 266
 267         err = __supplicant_start(element, &wifi_callback);
 268         if (err < 0)
 269                 return err;
 270
 271         __supplicant_scan(element);
 272
 273         return 0;
 274 }
 275
 276 static int wifi_disable(struct connman_element *element)
 277 {
 278         struct wifi_data *data = connman_element_get_data(element);
 279         GSList *list;
 280
 281         DBG("element %p name %s", element, element->name);
 282
 283         __supplicant_disconnect(element);
 284
 285         g_static_mutex_lock(&data->mutex);
 286
 287         for (list = data->list; list; list = list->next) {
 288                 struct connman_element *network = list->data;
 289
 290                 connman_element_unref(network);
 291         }
 292
 293         g_slist_free(data->list);
 294         data->list = NULL;
 295
 296         g_static_mutex_unlock(&data->mutex);
 297
 298         connman_element_unregister_children(element);
 299
 300         return 0;
 301 }
 302
 303 static struct connman_driver wifi_driver = {
 304         .name           = "wifi-device",
 305         .type           = CONNMAN_ELEMENT_TYPE_DEVICE,
 306         .subtype        = CONNMAN_ELEMENT_SUBTYPE_WIFI,
 307         .probe          = wifi_probe,
 308         .remove         = wifi_remove,
 309         .update         = wifi_update,
 310         .enable         = wifi_enable,
 311         .disable        = wifi_disable,
 312 };
 313
 314 static GStaticMutex device_mutex = G_STATIC_MUTEX_INIT;
 315 static GSList *device_list = NULL;
 316
 317 static void wifi_newlink(unsigned short type, int index,
 318                                         unsigned flags, unsigned change)
 319 {
 320         struct connman_element *device;
 321         GSList *list;
 322         gboolean exists = FALSE;
 323         gchar *name;
 324         struct iwreq iwr;
 325         int sk;
 326
 327         DBG("index %d", index);
 328
 329         if (type != ARPHRD_ETHER)
 330                 return;
 331
 332         name = inet_index2name(index);
 333
 334         memset(&iwr, 0, sizeof(iwr));
 335         strncpy(iwr.ifr_ifrn.ifrn_name, name, IFNAMSIZ);
 336
 337         sk = socket(PF_INET, SOCK_DGRAM, 0);
 338
 339         if (ioctl(sk, SIOCGIWNAME, &iwr) < 0) {
 340                 g_free(name);
 341                 close(sk);
 342                 return;
 343         }
 344
 345         close(sk);
 346
 347         g_static_mutex_lock(&device_mutex);
 348
 349         for (list = device_list; list; list = list->next) {
 350                 struct connman_element *device = list->data;
 351
 352                 if (device->index == index) {
 353                         exists = TRUE;
 354                         break;
 355                 }
 356         }
 357
 358         g_static_mutex_unlock(&device_mutex);
 359
 360         if (exists == TRUE) {
 361                 g_free(name);
 362                 return;
 363         }
 364
 365         device = connman_element_create(NULL);
 366         device->type = CONNMAN_ELEMENT_TYPE_DEVICE;
 367         device->subtype = CONNMAN_ELEMENT_SUBTYPE_WIFI;
 368
 369         device->index = index;
 370         device->name = name;
 371
 372         g_static_mutex_lock(&device_mutex);
 373
 374         connman_element_register(device, NULL);
 375         device_list = g_slist_append(device_list, device);
 376
 377         g_static_mutex_unlock(&device_mutex);
 378 }
 379
 380 static void wifi_dellink(unsigned short type, int index,
 381                                         unsigned flags, unsigned change)
 382 {
 383         GSList *list;
 384
 385         DBG("index %d", index);
 386
 387         g_static_mutex_lock(&device_mutex);
 388
 389         for (list = device_list; list; list = list->next) {
 390                 struct connman_element *device = list->data;
 391
 392                 if (device->index == index) {
 393                         device_list = g_slist_remove(device_list, device);
 394                         connman_element_unregister(device);
 395                         connman_element_unref(device);
 396                         break;
 397                 }
 398         }
 399
 400         g_static_mutex_unlock(&device_mutex);
 401 }
 402
 403 static struct connman_rtnl wifi_rtnl = {
 404         .name           = "wifi",
 405         .newlink        = wifi_newlink,
 406         .dellink        = wifi_dellink,
 407 };
 408
 409 static void supplicant_connect(DBusConnection *connection, void *user_data)
 410 {
 411         DBG("connection %p", connection);
 412
 413         __supplicant_init(connection);
 414
 415         if (connman_rtnl_register(&wifi_rtnl) < 0)
 416                 return;
 417
 418         connman_rtnl_send_getlink();
 419 }
 420
 421 static void supplicant_disconnect(DBusConnection *connection, void *user_data)
 422 {
 423         GSList *list;
 424
 425         DBG("connection %p", connection);
 426
 427         connman_rtnl_unregister(&wifi_rtnl);
 428
 429         g_static_mutex_lock(&device_mutex);
 430
 431         for (list = device_list; list; list = list->next) {
 432                 struct connman_element *device = list->data;
 433
 434                 connman_element_unregister(device);
 435                 connman_element_unref(device);
 436         }
 437
 438         g_slist_free(device_list);
 439         device_list = NULL;
 440
 441         g_static_mutex_unlock(&device_mutex);
 442
 443         __supplicant_exit();
 444 }
 445
 446 static DBusConnection *connection;
 447 static guint watch;
 448
 449 static int wifi_init(void)
 450 {
 451         int err;
 452
 453         connection = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
 454         if (connection == NULL)
 455                 return -EIO;
 456
 457         err = connman_driver_register(&network_driver);
 458         if (err < 0) {
 459                 dbus_connection_unref(connection);
 460                 return err;
 461         }
 462
 463         err = connman_driver_register(&wifi_driver);
 464         if (err < 0) {
 465                 connman_driver_unregister(&network_driver);
 466                 dbus_connection_unref(connection);
 467                 return err;
 468         }
 469
 470         watch = g_dbus_add_service_watch(connection, SUPPLICANT_NAME,
 471                         supplicant_connect, supplicant_disconnect, NULL, NULL);
 472
 473         if (g_dbus_check_service(connection, SUPPLICANT_NAME) == TRUE)
 474                 supplicant_connect(connection, NULL);
 475
 476         return 0;
 477 }
 478
 479 static void wifi_exit(void)
 480 {
 481         connman_driver_unregister(&network_driver);
 482         connman_driver_unregister(&wifi_driver);
 483
 484         if (watch > 0)
 485                 g_dbus_remove_watch(connection, watch);
 486
 487         supplicant_disconnect(connection, NULL);
 488
 489         dbus_connection_unref(connection);
 490 }
 491
 492 CONNMAN_PLUGIN_DEFINE("wifi", "WiFi interface plugin", VERSION,
 493                                                         wifi_init, wifi_exit)