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                 else if (temp[i] == '(' || temp[i] == ')')
 186                         temp[i] = '_';
 187                 else 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                 const char *security;
 195                 guint8 strength;
 196
 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                 if (network->has_rsn == TRUE)
 211                         security = "wpa2";
 212                 else if (network->has_wpa == TRUE)
 213                         security = "wpa";
 214                 else if (network->has_wep == TRUE)
 215                         security = "wep";
 216                 else
 217                         security = "none";
 218
 219                 connman_element_add_static_property(element, "WiFi.Security",
 220                                                 DBUS_TYPE_STRING, &security);
 221
 222                 strength = network->quality;
 223
 224                 connman_element_add_static_property(element, "WiFi.Strength",
 225                                                 DBUS_TYPE_BYTE, &strength);
 226
 227                 connman_element_add_static_property(element, "WiFi.Noise",
 228                                         DBUS_TYPE_INT32, &network->noise);
 229
 230                 DBG("%s (%s) strength %d", network->identifier,
 231                                                         security, strength);
 232
 233                 connman_element_register(element, parent);
 234         }
 235
 236         g_free(temp);
 237 }
 238
 239 static struct supplicant_callback wifi_callback = {
 240         .state_change   = state_change,
 241         .scan_result    = scan_result,
 242 };
 243
 244 static int wifi_probe(struct connman_element *element)
 245 {
 246         struct wifi_data *data;
 247
 248         DBG("element %p name %s", element, element->name);
 249
 250         data = g_try_new0(struct wifi_data, 1);
 251         if (data == NULL)
 252                 return -ENOMEM;
 253
 254         connman_element_set_data(element, data);
 255
 256         return 0;
 257 }
 258
 259 static void wifi_remove(struct connman_element *element)
 260 {
 261         struct wifi_data *data = connman_element_get_data(element);
 262
 263         DBG("element %p name %s", element, element->name);
 264
 265         connman_element_set_data(element, NULL);
 266
 267         g_free(data->identifier);
 268         g_free(data);
 269 }
 270
 271 static int wifi_update(struct connman_element *element)
 272 {
 273         DBG("element %p name %s", element, element->name);
 274
 275         __supplicant_scan(element);
 276
 277         return 0;
 278 }
 279
 280 static int wifi_enable(struct connman_element *element)
 281 {
 282         int err;
 283
 284         DBG("element %p name %s", element, element->name);
 285
 286         err = __supplicant_start(element, &wifi_callback);
 287         if (err < 0)
 288                 return err;
 289
 290         __supplicant_scan(element);
 291
 292         return 0;
 293 }
 294
 295 static int wifi_disable(struct connman_element *element)
 296 {
 297         struct wifi_data *data = connman_element_get_data(element);
 298         GSList *list;
 299
 300         DBG("element %p name %s", element, element->name);
 301
 302         __supplicant_disconnect(element);
 303
 304         for (list = data->list; list; list = list->next) {
 305                 struct connman_element *network = list->data;
 306
 307                 connman_element_unref(network);
 308         }
 309
 310         g_slist_free(data->list);
 311         data->list = NULL;
 312
 313         connman_element_unregister_children(element);
 314
 315         return 0;
 316 }
 317
 318 static struct connman_driver wifi_driver = {
 319         .name           = "wifi-device",
 320         .type           = CONNMAN_ELEMENT_TYPE_DEVICE,
 321         .subtype        = CONNMAN_ELEMENT_SUBTYPE_WIFI,
 322         .probe          = wifi_probe,
 323         .remove         = wifi_remove,
 324         .update         = wifi_update,
 325         .enable         = wifi_enable,
 326         .disable        = wifi_disable,
 327 };
 328
 329 static GSList *device_list = NULL;
 330
 331 static void wifi_newlink(unsigned short type, int index,
 332                                         unsigned flags, unsigned change)
 333 {
 334         struct connman_element *device;
 335         GSList *list;
 336         gboolean exists = FALSE;
 337         gchar *name;
 338         struct iwreq iwr;
 339         int sk;
 340
 341         DBG("index %d", index);
 342
 343         if (type != ARPHRD_ETHER)
 344                 return;
 345
 346         name = inet_index2name(index);
 347
 348         memset(&iwr, 0, sizeof(iwr));
 349         strncpy(iwr.ifr_ifrn.ifrn_name, name, IFNAMSIZ);
 350
 351         sk = socket(PF_INET, SOCK_DGRAM, 0);
 352
 353         if (ioctl(sk, SIOCGIWNAME, &iwr) < 0) {
 354                 g_free(name);
 355                 close(sk);
 356                 return;
 357         }
 358
 359         close(sk);
 360
 361         for (list = device_list; list; list = list->next) {
 362                 struct connman_element *device = list->data;
 363
 364                 if (device->index == index) {
 365                         exists = TRUE;
 366                         break;
 367                 }
 368         }
 369
 370         if (exists == TRUE) {
 371                 g_free(name);
 372                 return;
 373         }
 374
 375         device = connman_element_create(NULL);
 376         device->type = CONNMAN_ELEMENT_TYPE_DEVICE;
 377         device->subtype = CONNMAN_ELEMENT_SUBTYPE_WIFI;
 378
 379         device->index = index;
 380         device->name = name;
 381
 382         connman_element_register(device, NULL);
 383         device_list = g_slist_append(device_list, device);
 384 }
 385
 386 static void wifi_dellink(unsigned short type, int index,
 387                                         unsigned flags, unsigned change)
 388 {
 389         GSList *list;
 390
 391         DBG("index %d", index);
 392
 393         for (list = device_list; list; list = list->next) {
 394                 struct connman_element *device = list->data;
 395
 396                 if (device->index == index) {
 397                         device_list = g_slist_remove(device_list, device);
 398                         connman_element_unregister(device);
 399                         connman_element_unref(device);
 400                         break;
 401                 }
 402         }
 403 }
 404
 405 static struct connman_rtnl wifi_rtnl = {
 406         .name           = "wifi",
 407         .newlink        = wifi_newlink,
 408         .dellink        = wifi_dellink,
 409 };
 410
 411 static void supplicant_connect(DBusConnection *connection, void *user_data)
 412 {
 413         DBG("connection %p", connection);
 414
 415         __supplicant_init(connection);
 416
 417         if (connman_rtnl_register(&wifi_rtnl) < 0)
 418                 return;
 419
 420         connman_rtnl_send_getlink();
 421 }
 422
 423 static void supplicant_disconnect(DBusConnection *connection, void *user_data)
 424 {
 425         GSList *list;
 426
 427         DBG("connection %p", connection);
 428
 429         connman_rtnl_unregister(&wifi_rtnl);
 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         __supplicant_exit();
 442 }
 443
 444 static DBusConnection *connection;
 445 static guint watch;
 446
 447 static int wifi_init(void)
 448 {
 449         int err;
 450
 451         connection = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
 452         if (connection == NULL)
 453                 return -EIO;
 454
 455         err = connman_driver_register(&network_driver);
 456         if (err < 0) {
 457                 dbus_connection_unref(connection);
 458                 return err;
 459         }
 460
 461         err = connman_driver_register(&wifi_driver);
 462         if (err < 0) {
 463                 connman_driver_unregister(&network_driver);
 464                 dbus_connection_unref(connection);
 465                 return err;
 466         }
 467
 468         watch = g_dbus_add_service_watch(connection, SUPPLICANT_NAME,
 469                         supplicant_connect, supplicant_disconnect, NULL, NULL);
 470
 471         if (g_dbus_check_service(connection, SUPPLICANT_NAME) == TRUE)
 472                 supplicant_connect(connection, NULL);
 473
 474         return 0;
 475 }
 476
 477 static void wifi_exit(void)
 478 {
 479         connman_driver_unregister(&network_driver);
 480         connman_driver_unregister(&wifi_driver);
 481
 482         if (watch > 0)
 483                 g_dbus_remove_watch(connection, watch);
 484
 485         supplicant_disconnect(connection, NULL);
 486
 487         dbus_connection_unref(connection);
 488 }
 489
 490 CONNMAN_PLUGIN_DEFINE("wifi", "WiFi interface plugin", VERSION,
 491                                                         wifi_init, wifi_exit)