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