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         gboolean connected;
  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, *security = NULL, *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->connected == TRUE)
  82                         return -EBUSY;
  83
  84                 if (data != NULL) {
  85                         g_free(data->identifier);
  86                         data->identifier = g_strdup(identifier);
  87                 }
  88         }
  89
  90         connman_element_get_value(element,
  91                         CONNMAN_PROPERTY_ID_WIFI_SECURITY, &security);
  92
  93         connman_element_get_value(element,
  94                         CONNMAN_PROPERTY_ID_WIFI_PASSPHRASE, &passphrase);
  95
  96         DBG("identifier %s security %s passhprase %s",
  97                                         identifier, security, passphrase);
  98
  99         if (__supplicant_connect(element, ssid, ssid_len,
 100                                                 security, passphrase) < 0)
 101                 connman_error("Failed to initiate connect");
 102
 103         return 0;
 104 }
 105
 106 static int network_disable(struct connman_element *element)
 107 {
 108         DBG("element %p name %s", element, element->name);
 109
 110         connman_element_unregister_children(element);
 111
 112         __supplicant_disconnect(element);
 113
 114         return 0;
 115 }
 116
 117 static struct connman_driver network_driver = {
 118         .name           = "wifi-network",
 119         .type           = CONNMAN_ELEMENT_TYPE_NETWORK,
 120         .subtype        = CONNMAN_ELEMENT_SUBTYPE_WIFI,
 121         .probe          = network_probe,
 122         .remove         = network_remove,
 123         .enable         = network_enable,
 124         .disable        = network_disable,
 125 };
 126
 127 static struct connman_element *find_element(struct wifi_data *data,
 128                                                 const char *identifier)
 129 {
 130         GSList *list;
 131
 132         for (list = data->list; list; list = list->next) {
 133                 struct connman_element *element = list->data;
 134
 135                 if (connman_element_match_static_property(element,
 136                                         "WiFi.Name", &identifier) == TRUE)
 137                         return element;
 138         }
 139
 140         return NULL;
 141 }
 142
 143 static void state_change(struct connman_element *parent,
 144                                                 enum supplicant_state state)
 145 {
 146         struct wifi_data *data = connman_element_get_data(parent);
 147         struct connman_element *element;
 148
 149         DBG("state %d", state);
 150
 151         if (data->identifier == NULL)
 152                 return;
 153
 154         element = find_element(data, data->identifier);
 155         if (element == NULL)
 156                 return;
 157
 158         if (state == STATE_COMPLETED) {
 159                 struct connman_element *dhcp;
 160
 161                 data->connected = TRUE;
 162
 163                 dhcp = connman_element_create(NULL);
 164
 165                 dhcp->type = CONNMAN_ELEMENT_TYPE_DHCP;
 166                 dhcp->index = element->index;
 167
 168                 connman_element_register(dhcp, element);
 169         } else if (state == STATE_DISCONNECTED || state == STATE_INACTIVE)
 170                 data->connected = FALSE;
 171 }
 172
 173 static void scan_result(struct connman_element *parent,
 174                                         struct supplicant_network *network)
 175 {
 176         struct wifi_data *data = connman_element_get_data(parent);
 177         struct connman_element *element;
 178         gchar *temp;
 179         int i;
 180
 181         DBG("network %p identifier %s", network, network->identifier);
 182
 183         if (data == NULL)
 184                 return;
 185
 186         if (network->identifier == NULL)
 187                 return;
 188
 189         if (network->identifier[0] == '\0')
 190                 return;
 191
 192         temp = g_strdup(network->identifier);
 193
 194         for (i = 0; i < strlen(temp); i++) {
 195                 if (temp[i] == ' ' || temp[i] == '.')
 196                         temp[i] = '_';
 197                 else if (temp[i] == '-' || temp[i] == '+')
 198                         temp[i] = '_';
 199                 else if (temp[i] == '!' || temp[i] == '?')
 200                         temp[i] = '_';
 201                 else if (temp[i] == '(' || temp[i] == ')')
 202                         temp[i] = '_';
 203                 else if (g_ascii_isprint(temp[i]) == FALSE)
 204                         temp[i] = '_';
 205                 temp[i] = g_ascii_tolower(temp[i]);
 206         }
 207
 208         element = find_element(data, network->identifier);
 209         if (element == NULL) {
 210                 guint8 strength;
 211
 212                 element = connman_element_create(temp);
 213
 214                 element->type = CONNMAN_ELEMENT_TYPE_NETWORK;
 215                 element->index = parent->index;
 216
 217                 data->list = g_slist_append(data->list, element);
 218
 219                 connman_element_add_static_property(element, "WiFi.Name",
 220                                 DBUS_TYPE_STRING, &network->identifier);
 221
 222                 connman_element_add_static_array_property(element, "WiFi.SSID",
 223                         DBUS_TYPE_BYTE, &network->ssid, network->ssid_len);
 224
 225                 if (element->wifi.security == NULL) {
 226                         const char *security;
 227
 228                         if (network->has_rsn == TRUE)
 229                                 security = "wpa2";
 230                         else if (network->has_wpa == TRUE)
 231                                 security = "wpa";
 232                         else if (network->has_wep == TRUE)
 233                                 security = "wep";
 234                         else
 235                                 security = "none";
 236
 237                         element->wifi.security = g_strdup(security);
 238                 }
 239
 240                 strength = network->quality;
 241
 242                 //connman_element_add_static_property(element, "WiFi.Strength",
 243                 //                              DBUS_TYPE_BYTE, &strength);
 244
 245                 //connman_element_add_static_property(element, "WiFi.Noise",
 246                 //                      DBUS_TYPE_INT32, &network->noise);
 247
 248                 DBG("%s (%s) strength %d", network->identifier,
 249                                         element->wifi.security, strength);
 250
 251                 connman_element_register(element, parent);
 252         }
 253
 254         g_free(temp);
 255 }
 256
 257 static struct supplicant_callback wifi_callback = {
 258         .state_change   = state_change,
 259         .scan_result    = scan_result,
 260 };
 261
 262 static int wifi_probe(struct connman_element *element)
 263 {
 264         struct wifi_data *data;
 265
 266         DBG("element %p name %s", element, element->name);
 267
 268         data = g_try_new0(struct wifi_data, 1);
 269         if (data == NULL)
 270                 return -ENOMEM;
 271
 272         data->connected = FALSE;
 273
 274         connman_element_set_data(element, data);
 275
 276         return 0;
 277 }
 278
 279 static void wifi_remove(struct connman_element *element)
 280 {
 281         struct wifi_data *data = connman_element_get_data(element);
 282
 283         DBG("element %p name %s", element, element->name);
 284
 285         connman_element_set_data(element, NULL);
 286
 287         g_free(data->identifier);
 288         g_free(data);
 289 }
 290
 291 static int wifi_update(struct connman_element *element)
 292 {
 293         DBG("element %p name %s", element, element->name);
 294
 295         __supplicant_scan(element);
 296
 297         return 0;
 298 }
 299
 300 static int wifi_enable(struct connman_element *element)
 301 {
 302         int err;
 303
 304         DBG("element %p name %s", element, element->name);
 305
 306         err = __supplicant_start(element, &wifi_callback);
 307         if (err < 0)
 308                 return err;
 309
 310         __supplicant_scan(element);
 311
 312         return 0;
 313 }
 314
 315 static int wifi_disable(struct connman_element *element)
 316 {
 317         struct wifi_data *data = connman_element_get_data(element);
 318         GSList *list;
 319
 320         DBG("element %p name %s", element, element->name);
 321
 322         __supplicant_disconnect(element);
 323
 324         for (list = data->list; list; list = list->next) {
 325                 struct connman_element *network = list->data;
 326
 327                 connman_element_unref(network);
 328         }
 329
 330         g_slist_free(data->list);
 331         data->list = NULL;
 332
 333         connman_element_unregister_children(element);
 334
 335         return 0;
 336 }
 337
 338 static struct connman_driver wifi_driver = {
 339         .name           = "wifi-device",
 340         .type           = CONNMAN_ELEMENT_TYPE_DEVICE,
 341         .subtype        = CONNMAN_ELEMENT_SUBTYPE_WIFI,
 342         .probe          = wifi_probe,
 343         .remove         = wifi_remove,
 344         .update         = wifi_update,
 345         .enable         = wifi_enable,
 346         .disable        = wifi_disable,
 347 };
 348
 349 static GSList *device_list = NULL;
 350
 351 static void wifi_newlink(unsigned short type, int index,
 352                                         unsigned flags, unsigned change)
 353 {
 354         struct connman_element *device;
 355         GSList *list;
 356         gboolean exists = FALSE;
 357         gchar *name;
 358         struct iwreq iwr;
 359         int sk;
 360
 361         DBG("index %d", index);
 362
 363         if (type != ARPHRD_ETHER)
 364                 return;
 365
 366         name = inet_index2name(index);
 367
 368         memset(&iwr, 0, sizeof(iwr));
 369         strncpy(iwr.ifr_ifrn.ifrn_name, name, IFNAMSIZ);
 370
 371         sk = socket(PF_INET, SOCK_DGRAM, 0);
 372
 373         if (ioctl(sk, SIOCGIWNAME, &iwr) < 0) {
 374                 g_free(name);
 375                 close(sk);
 376                 return;
 377         }
 378
 379         close(sk);
 380
 381         for (list = device_list; list; list = list->next) {
 382                 struct connman_element *device = list->data;
 383
 384                 if (device->index == index) {
 385                         exists = TRUE;
 386                         break;
 387                 }
 388         }
 389
 390         if (exists == TRUE) {
 391                 g_free(name);
 392                 return;
 393         }
 394
 395         device = connman_element_create(NULL);
 396         device->type = CONNMAN_ELEMENT_TYPE_DEVICE;
 397         device->subtype = CONNMAN_ELEMENT_SUBTYPE_WIFI;
 398
 399         device->index = index;
 400         device->name = name;
 401
 402         connman_element_register(device, NULL);
 403         device_list = g_slist_append(device_list, device);
 404 }
 405
 406 static void wifi_dellink(unsigned short type, int index,
 407                                         unsigned flags, unsigned change)
 408 {
 409         GSList *list;
 410
 411         DBG("index %d", index);
 412
 413         for (list = device_list; list; list = list->next) {
 414                 struct connman_element *device = list->data;
 415
 416                 if (device->index == index) {
 417                         device_list = g_slist_remove(device_list, device);
 418                         connman_element_unregister(device);
 419                         connman_element_unref(device);
 420                         break;
 421                 }
 422         }
 423 }
 424
 425 static struct connman_rtnl wifi_rtnl = {
 426         .name           = "wifi",
 427         .newlink        = wifi_newlink,
 428         .dellink        = wifi_dellink,
 429 };
 430
 431 static void supplicant_connect(DBusConnection *connection, void *user_data)
 432 {
 433         DBG("connection %p", connection);
 434
 435         __supplicant_init(connection);
 436
 437         if (connman_rtnl_register(&wifi_rtnl) < 0)
 438                 return;
 439
 440         connman_rtnl_send_getlink();
 441 }
 442
 443 static void supplicant_disconnect(DBusConnection *connection, void *user_data)
 444 {
 445         GSList *list;
 446
 447         DBG("connection %p", connection);
 448
 449         connman_rtnl_unregister(&wifi_rtnl);
 450
 451         for (list = device_list; list; list = list->next) {
 452                 struct connman_element *device = list->data;
 453
 454                 connman_element_unregister(device);
 455                 connman_element_unref(device);
 456         }
 457
 458         g_slist_free(device_list);
 459         device_list = NULL;
 460
 461         __supplicant_exit();
 462 }
 463
 464 static DBusConnection *connection;
 465 static guint watch;
 466
 467 static int wifi_init(void)
 468 {
 469         int err;
 470
 471         connection = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
 472         if (connection == NULL)
 473                 return -EIO;
 474
 475         err = connman_driver_register(&network_driver);
 476         if (err < 0) {
 477                 dbus_connection_unref(connection);
 478                 return err;
 479         }
 480
 481         err = connman_driver_register(&wifi_driver);
 482         if (err < 0) {
 483                 connman_driver_unregister(&network_driver);
 484                 dbus_connection_unref(connection);
 485                 return err;
 486         }
 487
 488         watch = g_dbus_add_service_watch(connection, SUPPLICANT_NAME,
 489                         supplicant_connect, supplicant_disconnect, NULL, NULL);
 490
 491         if (g_dbus_check_service(connection, SUPPLICANT_NAME) == TRUE)
 492                 supplicant_connect(connection, NULL);
 493
 494         return 0;
 495 }
 496
 497 static void wifi_exit(void)
 498 {
 499         connman_driver_unregister(&network_driver);
 500         connman_driver_unregister(&wifi_driver);
 501
 502         if (watch > 0)
 503                 g_dbus_remove_watch(connection, watch);
 504
 505         supplicant_disconnect(connection, NULL);
 506
 507         dbus_connection_unref(connection);
 508 }
 509
 510 CONNMAN_PLUGIN_DEFINE("wifi", "WiFi interface plugin", VERSION,
 511                                                         wifi_init, wifi_exit)