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