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 #define CLEANUP_PENDING_TIMEOUT  8      /* in seconds */
  45
  46 struct wifi_data {
  47         GSList *current;
  48         GSList *pending;
  49         guint timer;
  50         gchar *identifier;
  51         gboolean connected;
  52 };
  53
  54 static int network_probe(struct connman_element *element)
  55 {
  56         DBG("element %p name %s", element, element->name);
  57
  58         return 0;
  59 }
  60
  61 static void network_remove(struct connman_element *element)
  62 {
  63         DBG("element %p name %s", element, element->name);
  64 }
  65
  66 static int network_enable(struct connman_element *element)
  67 {
  68         char *name, *security = NULL, *passphrase = NULL;
  69         unsigned char *ssid;
  70         int ssid_len;
  71
  72         DBG("element %p name %s", element, element->name);
  73
  74         if (connman_element_get_static_property(element,
  75                                                 "Name", &name) == FALSE)
  76                 return -EIO;
  77
  78         if (connman_element_get_static_array_property(element,
  79                                 "WiFi.SSID", &ssid, &ssid_len) == FALSE)
  80                 return -EIO;
  81
  82         if (element->parent != NULL) {
  83                 struct wifi_data *data = connman_element_get_data(element->parent);
  84
  85                 if (data->connected == TRUE)
  86                         return -EBUSY;
  87
  88                 if (data != NULL) {
  89                         g_free(data->identifier);
  90                         data->identifier = g_strdup(name);
  91                 }
  92         }
  93
  94         connman_element_get_value(element,
  95                         CONNMAN_PROPERTY_ID_WIFI_SECURITY, &security);
  96
  97         connman_element_get_value(element,
  98                         CONNMAN_PROPERTY_ID_WIFI_PASSPHRASE, &passphrase);
  99
 100         DBG("name %s security %s passhprase %s",
 101                                         name, security, passphrase);
 102
 103         if (__supplicant_connect(element, ssid, ssid_len,
 104                                                 security, passphrase) < 0)
 105                 connman_error("Failed to initiate connect");
 106
 107         return 0;
 108 }
 109
 110 static int network_disable(struct connman_element *element)
 111 {
 112         DBG("element %p name %s", element, element->name);
 113
 114         connman_element_unregister_children(element);
 115
 116         __supplicant_disconnect(element);
 117
 118         return 0;
 119 }
 120
 121 static struct connman_driver network_driver = {
 122         .name           = "wifi-network",
 123         .type           = CONNMAN_ELEMENT_TYPE_NETWORK,
 124         .subtype        = CONNMAN_ELEMENT_SUBTYPE_WIFI,
 125         .probe          = network_probe,
 126         .remove         = network_remove,
 127         .enable         = network_enable,
 128         .disable        = network_disable,
 129 };
 130
 131 static struct connman_element *find_current_element(struct wifi_data *data,
 132                                                         const char *identifier)
 133 {
 134         GSList *list;
 135
 136         for (list = data->current; list; list = list->next) {
 137                 struct connman_element *element = list->data;
 138
 139                 if (connman_element_match_static_property(element,
 140                                         "Name", &identifier) == TRUE)
 141                         return element;
 142         }
 143
 144         return NULL;
 145 }
 146
 147 static struct connman_element *find_pending_element(struct wifi_data *data,
 148                                                         const char *identifier)
 149 {
 150         GSList *list;
 151
 152         for (list = data->pending; list; list = list->next) {
 153                 struct connman_element *element = list->data;
 154
 155                 if (connman_element_match_static_property(element,
 156                                         "Name", &identifier) == TRUE)
 157                         return element;
 158         }
 159
 160         return NULL;
 161 }
 162
 163 static void state_change(struct connman_element *parent,
 164                                                 enum supplicant_state state)
 165 {
 166         struct wifi_data *data = connman_element_get_data(parent);
 167         struct connman_element *element;
 168
 169         DBG("state %d", state);
 170
 171         if (data == NULL)
 172                 return;
 173
 174         if (data->identifier == NULL)
 175                 return;
 176
 177         element = find_current_element(data, data->identifier);
 178         if (element == NULL)
 179                 return;
 180
 181         if (state == STATE_COMPLETED) {
 182                 struct connman_element *dhcp;
 183
 184                 data->connected = TRUE;
 185
 186                 dhcp = connman_element_create(NULL);
 187
 188                 dhcp->type = CONNMAN_ELEMENT_TYPE_DHCP;
 189                 dhcp->index = element->index;
 190
 191                 connman_element_register(dhcp, element);
 192         } else if (state == STATE_DISCONNECTED || state == STATE_INACTIVE)
 193                 data->connected = FALSE;
 194 }
 195
 196 static gboolean cleanup_pending(gpointer user_data)
 197 {
 198         struct wifi_data *data = user_data;
 199         GSList *list;
 200
 201         DBG("");
 202
 203         for (list = data->pending; list; list = list->next) {
 204                 struct connman_element *element = list->data;
 205
 206                 DBG("element %p name %s", element, element->name);
 207
 208                 connman_element_unregister(element);
 209                 connman_element_unref(element);
 210         }
 211
 212         g_slist_free(data->pending);
 213         data->pending = NULL;
 214
 215         data->timer = 0;
 216
 217         return FALSE;
 218 }
 219
 220 static void clear_results(struct connman_element *parent)
 221 {
 222         struct wifi_data *data = connman_element_get_data(parent);
 223         GSList *list;
 224
 225         DBG("pending %d", g_slist_length(data->pending));
 226         DBG("current %d", g_slist_length(data->current));
 227
 228         data->pending = data->current;
 229         data->current = NULL;
 230
 231         if (data->timer == 0)
 232                 data->timer = g_timeout_add_seconds(CLEANUP_PENDING_TIMEOUT,
 233                                                         cleanup_pending, data);
 234 }
 235
 236 static void scan_result(struct connman_element *parent,
 237                                         struct supplicant_network *network)
 238 {
 239         struct wifi_data *data = connman_element_get_data(parent);
 240         struct connman_element *element;
 241         gchar *temp;
 242         int i;
 243
 244         DBG("network %p identifier %s", network, network->identifier);
 245
 246         if (data == NULL)
 247                 return;
 248
 249         if (network->identifier == NULL)
 250                 return;
 251
 252         if (network->identifier[0] == '\0')
 253                 return;
 254
 255         temp = g_strdup(network->identifier);
 256
 257         for (i = 0; i < strlen(temp); i++) {
 258                 if (temp[i] == ' ' || temp[i] == '.')
 259                         temp[i] = '_';
 260                 else if (temp[i] == '-' || temp[i] == '+')
 261                         temp[i] = '_';
 262                 else if (temp[i] == '!' || temp[i] == '?')
 263                         temp[i] = '_';
 264                 else if (temp[i] == '(' || temp[i] == ')')
 265                         temp[i] = '_';
 266                 else if (g_ascii_isprint(temp[i]) == FALSE)
 267                         temp[i] = '_';
 268                 temp[i] = g_ascii_tolower(temp[i]);
 269         }
 270
 271         element = find_pending_element(data, network->identifier);
 272         if (element == NULL) {
 273                 guint8 strength;
 274
 275                 element = connman_element_create(temp);
 276
 277                 element->type = CONNMAN_ELEMENT_TYPE_NETWORK;
 278                 element->index = parent->index;
 279
 280                 connman_element_add_static_property(element, "Name",
 281                                 DBUS_TYPE_STRING, &network->identifier);
 282
 283                 connman_element_add_static_array_property(element, "WiFi.SSID",
 284                         DBUS_TYPE_BYTE, &network->ssid, network->ssid_len);
 285
 286                 if (element->wifi.security == NULL) {
 287                         const char *security;
 288
 289                         if (network->has_rsn == TRUE)
 290                                 security = "wpa2";
 291                         else if (network->has_wpa == TRUE)
 292                                 security = "wpa";
 293                         else if (network->has_wep == TRUE)
 294                                 security = "wep";
 295                         else
 296                                 security = "none";
 297
 298                         element->wifi.security = g_strdup(security);
 299                 }
 300
 301                 strength = network->quality;
 302
 303                 connman_element_add_static_property(element, "WiFi.Strength",
 304                                                 DBUS_TYPE_BYTE, &strength);
 305
 306                 //connman_element_add_static_property(element, "WiFi.Noise",
 307                 //                      DBUS_TYPE_INT32, &network->noise);
 308
 309                 DBG("%s (%s) strength %d", network->identifier,
 310                                         element->wifi.security, strength);
 311
 312                 connman_element_register(element, parent);
 313         } else
 314                 data->pending = g_slist_remove(data->pending, element);
 315
 316         data->current = g_slist_append(data->current, element);
 317
 318         element->available = TRUE;
 319
 320         g_free(temp);
 321 }
 322
 323 static struct supplicant_callback wifi_callback = {
 324         .state_change   = state_change,
 325         .clear_results  = clear_results,
 326         .scan_result    = scan_result,
 327 };
 328
 329 static int wifi_probe(struct connman_element *element)
 330 {
 331         struct wifi_data *data;
 332
 333         DBG("element %p name %s", element, element->name);
 334
 335         data = g_try_new0(struct wifi_data, 1);
 336         if (data == NULL)
 337                 return -ENOMEM;
 338
 339         data->connected = FALSE;
 340
 341         connman_element_set_data(element, data);
 342
 343         return 0;
 344 }
 345
 346 static void wifi_remove(struct connman_element *element)
 347 {
 348         struct wifi_data *data = connman_element_get_data(element);
 349
 350         DBG("element %p name %s", element, element->name);
 351
 352         connman_element_set_data(element, NULL);
 353
 354         g_free(data->identifier);
 355         g_free(data);
 356 }
 357
 358 static int wifi_update(struct connman_element *element)
 359 {
 360         DBG("element %p name %s", element, element->name);
 361
 362         __supplicant_scan(element);
 363
 364         return 0;
 365 }
 366
 367 static int wifi_enable(struct connman_element *element)
 368 {
 369         int err;
 370
 371         DBG("element %p name %s", element, element->name);
 372
 373         err = __supplicant_start(element, &wifi_callback);
 374         if (err < 0)
 375                 return err;
 376
 377         __supplicant_scan(element);
 378
 379         return 0;
 380 }
 381
 382 static int wifi_disable(struct connman_element *element)
 383 {
 384         struct wifi_data *data = connman_element_get_data(element);
 385         GSList *list;
 386
 387         DBG("element %p name %s", element, element->name);
 388
 389         if (data->timer > 0) {
 390                 g_source_remove(data->timer);
 391                 data->timer = 0;
 392         }
 393
 394         __supplicant_disconnect(element);
 395
 396         for (list = data->pending; list; list = list->next) {
 397                 struct connman_element *network = list->data;
 398
 399                 connman_element_unref(network);
 400         }
 401
 402         g_slist_free(data->pending);
 403         data->pending = NULL;
 404
 405         for (list = data->current; list; list = list->next) {
 406                 struct connman_element *network = list->data;
 407
 408                 connman_element_unref(network);
 409         }
 410
 411         g_slist_free(data->current);
 412         data->current = NULL;
 413
 414         connman_element_unregister_children(element);
 415
 416         __supplicant_stop(element);
 417
 418         return 0;
 419 }
 420
 421 static struct connman_driver wifi_driver = {
 422         .name           = "wifi-device",
 423         .type           = CONNMAN_ELEMENT_TYPE_DEVICE,
 424         .subtype        = CONNMAN_ELEMENT_SUBTYPE_WIFI,
 425         .probe          = wifi_probe,
 426         .remove         = wifi_remove,
 427         .update         = wifi_update,
 428         .enable         = wifi_enable,
 429         .disable        = wifi_disable,
 430 };
 431
 432 static GSList *device_list = NULL;
 433
 434 static void wifi_newlink(unsigned short type, int index,
 435                                         unsigned flags, unsigned change)
 436 {
 437         struct connman_element *device;
 438         GSList *list;
 439         gboolean exists = FALSE;
 440         gchar *name, *devname;
 441         struct iwreq iwr;
 442         int sk;
 443
 444         DBG("index %d", index);
 445
 446         if (type != ARPHRD_ETHER)
 447                 return;
 448
 449         name = inet_index2ident(index, "dev_");
 450         devname = inet_index2name(index);
 451
 452         memset(&iwr, 0, sizeof(iwr));
 453         strncpy(iwr.ifr_ifrn.ifrn_name, devname, IFNAMSIZ);
 454
 455         sk = socket(PF_INET, SOCK_DGRAM, 0);
 456
 457         if (ioctl(sk, SIOCGIWNAME, &iwr) < 0) {
 458                 g_free(name);
 459                 close(sk);
 460                 return;
 461         }
 462
 463         close(sk);
 464
 465         for (list = device_list; list; list = list->next) {
 466                 struct connman_element *device = list->data;
 467
 468                 if (device->index == index) {
 469                         exists = TRUE;
 470                         break;
 471                 }
 472         }
 473
 474         if (exists == TRUE) {
 475                 g_free(name);
 476                 return;
 477         }
 478
 479         device = connman_element_create(NULL);
 480         device->type = CONNMAN_ELEMENT_TYPE_DEVICE;
 481         device->subtype = CONNMAN_ELEMENT_SUBTYPE_WIFI;
 482
 483         device->index = index;
 484         device->name = name;
 485         device->devname = devname;
 486
 487         connman_element_register(device, NULL);
 488         device_list = g_slist_append(device_list, device);
 489 }
 490
 491 static void wifi_dellink(unsigned short type, int index,
 492                                         unsigned flags, unsigned change)
 493 {
 494         GSList *list;
 495
 496         DBG("index %d", index);
 497
 498         for (list = device_list; list; list = list->next) {
 499                 struct connman_element *device = list->data;
 500
 501                 if (device->index == index) {
 502                         device_list = g_slist_remove(device_list, device);
 503                         connman_element_unregister(device);
 504                         connman_element_unref(device);
 505                         break;
 506                 }
 507         }
 508 }
 509
 510 static struct connman_rtnl wifi_rtnl = {
 511         .name           = "wifi",
 512         .newlink        = wifi_newlink,
 513         .dellink        = wifi_dellink,
 514 };
 515
 516 static void supplicant_connect(DBusConnection *connection, void *user_data)
 517 {
 518         DBG("connection %p", connection);
 519
 520         __supplicant_init(connection);
 521
 522         if (connman_rtnl_register(&wifi_rtnl) < 0)
 523                 return;
 524
 525         connman_rtnl_send_getlink();
 526 }
 527
 528 static void supplicant_disconnect(DBusConnection *connection, void *user_data)
 529 {
 530         GSList *list;
 531
 532         DBG("connection %p", connection);
 533
 534         connman_rtnl_unregister(&wifi_rtnl);
 535
 536         for (list = device_list; list; list = list->next) {
 537                 struct connman_element *device = list->data;
 538
 539                 connman_element_unregister(device);
 540                 connman_element_unref(device);
 541         }
 542
 543         g_slist_free(device_list);
 544         device_list = NULL;
 545
 546         __supplicant_exit();
 547 }
 548
 549 static DBusConnection *connection;
 550 static guint watch;
 551
 552 static int wifi_init(void)
 553 {
 554         int err;
 555
 556         connection = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
 557         if (connection == NULL)
 558                 return -EIO;
 559
 560         err = connman_driver_register(&network_driver);
 561         if (err < 0) {
 562                 dbus_connection_unref(connection);
 563                 return err;
 564         }
 565
 566         err = connman_driver_register(&wifi_driver);
 567         if (err < 0) {
 568                 connman_driver_unregister(&network_driver);
 569                 dbus_connection_unref(connection);
 570                 return err;
 571         }
 572
 573         watch = g_dbus_add_service_watch(connection, SUPPLICANT_NAME,
 574                         supplicant_connect, supplicant_disconnect, NULL, NULL);
 575
 576         if (g_dbus_check_service(connection, SUPPLICANT_NAME) == TRUE)
 577                 supplicant_connect(connection, NULL);
 578
 579         return 0;
 580 }
 581
 582 static void wifi_exit(void)
 583 {
 584         connman_driver_unregister(&network_driver);
 585         connman_driver_unregister(&wifi_driver);
 586
 587         if (watch > 0)
 588                 g_dbus_remove_watch(connection, watch);
 589
 590         supplicant_disconnect(connection, NULL);
 591
 592         dbus_connection_unref(connection);
 593 }
 594
 595 CONNMAN_PLUGIN_DEFINE(wifi, "WiFi interface plugin", VERSION,
 596                                                         wifi_init, wifi_exit)