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_TIMEOUT   8     /* in seconds */
  45 #define INACTIVE_TIMEOUT  12    /* in seconds */
  46
  47 struct wifi_data {
  48         GSList *current;
  49         GSList *pending;
  50         guint cleanup_timer;
  51         guint inactive_timer;
  52         gchar *identifier;
  53         gboolean connected;
  54 };
  55
  56 static int network_probe(struct connman_element *element)
  57 {
  58         DBG("element %p name %s", element, element->name);
  59
  60         return 0;
  61 }
  62
  63 static void network_remove(struct connman_element *element)
  64 {
  65         DBG("element %p name %s", element, element->name);
  66 }
  67
  68 static int network_enable(struct connman_element *element)
  69 {
  70         struct connman_element *device = element->parent;
  71         char *name, *security = NULL, *passphrase = NULL;
  72         unsigned char *ssid;
  73         int ssid_len;
  74
  75         DBG("element %p name %s", element, element->name);
  76
  77         if (connman_element_get_static_property(element,
  78                                                 "Name", &name) == FALSE)
  79                 return -EIO;
  80
  81         if (connman_element_get_static_array_property(element,
  82                                 "WiFi.SSID", &ssid, &ssid_len) == FALSE)
  83                 return -EIO;
  84
  85         if (device != NULL) {
  86                 struct wifi_data *data = connman_element_get_data(device);
  87
  88                 if (data != NULL) {
  89                         if (data->connected == TRUE)
  90                                 return -EBUSY;
  91
  92                         g_free(data->identifier);
  93                         data->identifier = g_strdup(name);
  94                 }
  95         }
  96
  97         connman_element_get_value(element,
  98                         CONNMAN_PROPERTY_ID_WIFI_SECURITY, &security);
  99
 100         connman_element_get_value(element,
 101                         CONNMAN_PROPERTY_ID_WIFI_PASSPHRASE, &passphrase);
 102
 103         DBG("name %s security %s passhprase %s",
 104                                         name, security, passphrase);
 105
 106         if (__supplicant_connect(element, ssid, ssid_len,
 107                                                 security, passphrase) < 0)
 108                 connman_error("Failed to initiate connect");
 109
 110         return 0;
 111 }
 112
 113 static int network_disable(struct connman_element *element)
 114 {
 115         DBG("element %p name %s", element, element->name);
 116
 117         connman_element_unregister_children(element);
 118
 119         __supplicant_disconnect(element);
 120
 121         return 0;
 122 }
 123
 124 static struct connman_driver network_driver = {
 125         .name           = "wifi-network",
 126         .type           = CONNMAN_ELEMENT_TYPE_NETWORK,
 127         .subtype        = CONNMAN_ELEMENT_SUBTYPE_WIFI,
 128         .probe          = network_probe,
 129         .remove         = network_remove,
 130         .enable         = network_enable,
 131         .disable        = network_disable,
 132 };
 133
 134 static struct connman_element *find_current_element(struct wifi_data *data,
 135                                                         const char *identifier)
 136 {
 137         GSList *list;
 138
 139         for (list = data->current; list; list = list->next) {
 140                 struct connman_element *element = list->data;
 141
 142                 if (connman_element_match_static_property(element,
 143                                         "Name", &identifier) == TRUE)
 144                         return element;
 145         }
 146
 147         return NULL;
 148 }
 149
 150 static struct connman_element *find_pending_element(struct wifi_data *data,
 151                                                         const char *identifier)
 152 {
 153         GSList *list;
 154
 155         for (list = data->pending; list; list = list->next) {
 156                 struct connman_element *element = list->data;
 157
 158                 if (connman_element_match_static_property(element,
 159                                         "Name", &identifier) == TRUE)
 160                         return element;
 161         }
 162
 163         return NULL;
 164 }
 165
 166 static gboolean inactive_scan(gpointer user_data)
 167 {
 168         struct connman_element *device = user_data;
 169         struct wifi_data *data = connman_element_get_data(device);
 170
 171         DBG("");
 172
 173         if (data->cleanup_timer > 0) {
 174                 g_source_remove(data->cleanup_timer);
 175                 data->cleanup_timer = 0;
 176         }
 177
 178         __supplicant_scan(device);
 179
 180         data->inactive_timer = 0;
 181
 182         return FALSE;
 183 }
 184
 185 static void connect_known_networks(struct connman_element *device)
 186 {
 187         struct wifi_data *data = connman_element_get_data(device);
 188         GSList *list;
 189
 190         DBG("");
 191
 192         if (data->inactive_timer > 0) {
 193                 g_source_remove(data->inactive_timer);
 194                 data->inactive_timer = 0;
 195         }
 196
 197         for (list = data->current; list; list = list->next) {
 198                 struct connman_element *element = list->data;
 199
 200                 if (element->policy == CONNMAN_ELEMENT_POLICY_AUTO &&
 201                                                 element->remember == TRUE &&
 202                                                 element->available == TRUE) {
 203                         if (network_enable(element) == 0)
 204                                 return;
 205                 }
 206         }
 207
 208         data->inactive_timer = g_timeout_add_seconds(INACTIVE_TIMEOUT,
 209                                                         inactive_scan, device);
 210 }
 211
 212 static void state_change(struct connman_element *device,
 213                                                 enum supplicant_state state)
 214 {
 215         struct wifi_data *data = connman_element_get_data(device);
 216         struct connman_element *element;
 217
 218         DBG("state %d", state);
 219
 220         if (data == NULL)
 221                 return;
 222
 223         if (data->identifier == NULL)
 224                 goto reconnect;
 225
 226         element = find_current_element(data, data->identifier);
 227         if (element == NULL)
 228                 goto reconnect;
 229
 230         if (state == STATE_COMPLETED) {
 231                 struct connman_element *dhcp;
 232
 233                 data->connected = TRUE;
 234                 connman_element_set_enabled(element, TRUE);
 235
 236                 dhcp = connman_element_create(NULL);
 237
 238                 dhcp->type = CONNMAN_ELEMENT_TYPE_DHCP;
 239                 dhcp->index = element->index;
 240
 241                 connman_element_register(dhcp, element);
 242         } else if (state == STATE_INACTIVE || state == STATE_DISCONNECTED) {
 243                 data->connected = FALSE;
 244                 connman_element_set_enabled(element, FALSE);
 245
 246                 connman_element_unregister_children(element);
 247         }
 248
 249 reconnect:
 250         if (state == STATE_INACTIVE || state == STATE_DISCONNECTED) {
 251                 data->connected = FALSE;
 252                 connect_known_networks(device);
 253         }
 254 }
 255
 256 static gboolean cleanup_pending(gpointer user_data)
 257 {
 258         struct wifi_data *data = user_data;
 259         GSList *list;
 260
 261         DBG("");
 262
 263         for (list = data->pending; list; list = list->next) {
 264                 struct connman_element *element = list->data;
 265
 266                 DBG("element %p name %s", element, element->name);
 267
 268                 connman_element_unregister(element);
 269                 connman_element_unref(element);
 270         }
 271
 272         g_slist_free(data->pending);
 273         data->pending = NULL;
 274
 275         data->cleanup_timer = 0;
 276
 277         return FALSE;
 278 }
 279
 280 static void clear_results(struct connman_element *device)
 281 {
 282         struct wifi_data *data = connman_element_get_data(device);
 283
 284         DBG("pending %d", g_slist_length(data->pending));
 285         DBG("current %d", g_slist_length(data->current));
 286
 287         data->pending = data->current;
 288         data->current = NULL;
 289
 290         if (data->cleanup_timer > 0)
 291                 return;
 292
 293         data->cleanup_timer = g_timeout_add_seconds(CLEANUP_TIMEOUT,
 294                                                         cleanup_pending, data);
 295 }
 296
 297 static void scan_result(struct connman_element *device,
 298                                         struct supplicant_network *network)
 299 {
 300         struct wifi_data *data = connman_element_get_data(device);
 301         struct connman_element *element;
 302         gchar *temp;
 303         int i;
 304
 305         DBG("network %p identifier %s", network, network->identifier);
 306
 307         if (data == NULL)
 308                 return;
 309
 310         if (network->identifier == NULL)
 311                 return;
 312
 313         if (network->identifier[0] == '\0')
 314                 return;
 315
 316         temp = g_strdup(network->identifier);
 317
 318         for (i = 0; i < strlen(temp); i++) {
 319                 gchar tmp = g_ascii_tolower(temp[i]);
 320
 321                 if (tmp < 'a' || tmp > 'z')
 322                         temp[i] = '_';
 323         }
 324
 325         element = find_pending_element(data, network->identifier);
 326         if (element == NULL) {
 327                 guint8 strength;
 328
 329                 element = connman_element_create(temp);
 330
 331                 element->type = CONNMAN_ELEMENT_TYPE_NETWORK;
 332                 element->index = device->index;
 333
 334                 connman_element_add_static_property(element, "Name",
 335                                 DBUS_TYPE_STRING, &network->identifier);
 336
 337                 connman_element_add_static_array_property(element, "WiFi.SSID",
 338                         DBUS_TYPE_BYTE, &network->ssid, network->ssid_len);
 339
 340                 if (element->wifi.security == NULL) {
 341                         const char *security;
 342
 343                         if (network->has_rsn == TRUE)
 344                                 security = "wpa2";
 345                         else if (network->has_wpa == TRUE)
 346                                 security = "wpa";
 347                         else if (network->has_wep == TRUE)
 348                                 security = "wep";
 349                         else
 350                                 security = "none";
 351
 352                         element->wifi.security = g_strdup(security);
 353                 }
 354
 355                 strength = network->quality;
 356
 357                 connman_element_add_static_property(element, "WiFi.Strength",
 358                                                 DBUS_TYPE_BYTE, &strength);
 359
 360                 //connman_element_add_static_property(element, "WiFi.Noise",
 361                 //                      DBUS_TYPE_INT32, &network->noise);
 362
 363                 DBG("%s (%s) strength %d", network->identifier,
 364                                         element->wifi.security, strength);
 365
 366                 connman_element_register(element, device);
 367         } else
 368                 data->pending = g_slist_remove(data->pending, element);
 369
 370         data->current = g_slist_append(data->current, element);
 371
 372         element->available = TRUE;
 373
 374         g_free(temp);
 375 }
 376
 377 static struct supplicant_callback wifi_callback = {
 378         .state_change   = state_change,
 379         .clear_results  = clear_results,
 380         .scan_result    = scan_result,
 381 };
 382
 383 static int wifi_probe(struct connman_element *element)
 384 {
 385         struct wifi_data *data;
 386
 387         DBG("element %p name %s", element, element->name);
 388
 389         data = g_try_new0(struct wifi_data, 1);
 390         if (data == NULL)
 391                 return -ENOMEM;
 392
 393         data->connected = FALSE;
 394
 395         connman_element_set_data(element, data);
 396
 397         return 0;
 398 }
 399
 400 static void wifi_remove(struct connman_element *element)
 401 {
 402         struct wifi_data *data = connman_element_get_data(element);
 403
 404         DBG("element %p name %s", element, element->name);
 405
 406         connman_element_set_data(element, NULL);
 407
 408         g_free(data->identifier);
 409         g_free(data);
 410 }
 411
 412 static int wifi_update(struct connman_element *element)
 413 {
 414         DBG("element %p name %s", element, element->name);
 415
 416         __supplicant_scan(element);
 417
 418         return 0;
 419 }
 420
 421 static int wifi_enable(struct connman_element *element)
 422 {
 423         int err;
 424
 425         DBG("element %p name %s", element, element->name);
 426
 427         err = __supplicant_start(element, &wifi_callback);
 428         if (err < 0)
 429                 return err;
 430
 431         __supplicant_scan(element);
 432
 433         return 0;
 434 }
 435
 436 static int wifi_disable(struct connman_element *element)
 437 {
 438         struct wifi_data *data = connman_element_get_data(element);
 439         GSList *list;
 440
 441         DBG("element %p name %s", element, element->name);
 442
 443         if (data->cleanup_timer > 0) {
 444                 g_source_remove(data->cleanup_timer);
 445                 data->cleanup_timer = 0;
 446         }
 447
 448         if (data->inactive_timer > 0) {
 449                 g_source_remove(data->inactive_timer);
 450                 data->inactive_timer = 0;
 451         }
 452
 453         __supplicant_disconnect(element);
 454
 455         for (list = data->pending; list; list = list->next) {
 456                 struct connman_element *network = list->data;
 457
 458                 connman_element_unref(network);
 459         }
 460
 461         g_slist_free(data->pending);
 462         data->pending = NULL;
 463
 464         for (list = data->current; list; list = list->next) {
 465                 struct connman_element *network = list->data;
 466
 467                 connman_element_unref(network);
 468         }
 469
 470         g_slist_free(data->current);
 471         data->current = NULL;
 472
 473         connman_element_unregister_children(element);
 474
 475         __supplicant_stop(element);
 476
 477         return 0;
 478 }
 479
 480 static struct connman_driver wifi_driver = {
 481         .name           = "wifi-device",
 482         .type           = CONNMAN_ELEMENT_TYPE_DEVICE,
 483         .subtype        = CONNMAN_ELEMENT_SUBTYPE_WIFI,
 484         .probe          = wifi_probe,
 485         .remove         = wifi_remove,
 486         .update         = wifi_update,
 487         .enable         = wifi_enable,
 488         .disable        = wifi_disable,
 489 };
 490
 491 static GSList *device_list = NULL;
 492
 493 static void wifi_newlink(unsigned short type, int index,
 494                                         unsigned flags, unsigned change)
 495 {
 496         struct connman_element *device;
 497         GSList *list;
 498         gboolean exists = FALSE;
 499         gchar *name, *devname;
 500         struct iwreq iwr;
 501         int sk;
 502
 503         DBG("index %d", index);
 504
 505         if (type != ARPHRD_ETHER)
 506                 return;
 507
 508         name = inet_index2ident(index, "dev_");
 509         devname = inet_index2name(index);
 510
 511         memset(&iwr, 0, sizeof(iwr));
 512         strncpy(iwr.ifr_ifrn.ifrn_name, devname, IFNAMSIZ);
 513
 514         sk = socket(PF_INET, SOCK_DGRAM, 0);
 515
 516         if (ioctl(sk, SIOCGIWNAME, &iwr) < 0) {
 517                 g_free(name);
 518                 close(sk);
 519                 return;
 520         }
 521
 522         close(sk);
 523
 524         for (list = device_list; list; list = list->next) {
 525                 struct connman_element *device = list->data;
 526
 527                 if (device->index == index) {
 528                         exists = TRUE;
 529                         break;
 530                 }
 531         }
 532
 533         if (exists == TRUE) {
 534                 g_free(name);
 535                 return;
 536         }
 537
 538         device = connman_element_create(NULL);
 539         device->type = CONNMAN_ELEMENT_TYPE_DEVICE;
 540         device->subtype = CONNMAN_ELEMENT_SUBTYPE_WIFI;
 541
 542         device->index = index;
 543         device->name = name;
 544         device->devname = devname;
 545
 546         connman_element_register(device, NULL);
 547         device_list = g_slist_append(device_list, device);
 548 }
 549
 550 static void wifi_dellink(unsigned short type, int index,
 551                                         unsigned flags, unsigned change)
 552 {
 553         GSList *list;
 554
 555         DBG("index %d", index);
 556
 557         for (list = device_list; list; list = list->next) {
 558                 struct connman_element *device = list->data;
 559
 560                 if (device->index == index) {
 561                         device_list = g_slist_remove(device_list, device);
 562                         connman_element_unregister(device);
 563                         connman_element_unref(device);
 564                         break;
 565                 }
 566         }
 567 }
 568
 569 static struct connman_rtnl wifi_rtnl = {
 570         .name           = "wifi",
 571         .newlink        = wifi_newlink,
 572         .dellink        = wifi_dellink,
 573 };
 574
 575 static void supplicant_connect(DBusConnection *connection, void *user_data)
 576 {
 577         DBG("connection %p", connection);
 578
 579         __supplicant_init(connection);
 580
 581         if (connman_rtnl_register(&wifi_rtnl) < 0)
 582                 return;
 583
 584         connman_rtnl_send_getlink();
 585 }
 586
 587 static void supplicant_disconnect(DBusConnection *connection, void *user_data)
 588 {
 589         GSList *list;
 590
 591         DBG("connection %p", connection);
 592
 593         connman_rtnl_unregister(&wifi_rtnl);
 594
 595         for (list = device_list; list; list = list->next) {
 596                 struct connman_element *device = list->data;
 597
 598                 connman_element_unregister(device);
 599                 connman_element_unref(device);
 600         }
 601
 602         g_slist_free(device_list);
 603         device_list = NULL;
 604
 605         __supplicant_exit();
 606 }
 607
 608 static DBusConnection *connection;
 609 static guint watch;
 610
 611 static int wifi_init(void)
 612 {
 613         int err;
 614
 615         connection = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
 616         if (connection == NULL)
 617                 return -EIO;
 618
 619         err = connman_driver_register(&network_driver);
 620         if (err < 0) {
 621                 dbus_connection_unref(connection);
 622                 return err;
 623         }
 624
 625         err = connman_driver_register(&wifi_driver);
 626         if (err < 0) {
 627                 connman_driver_unregister(&network_driver);
 628                 dbus_connection_unref(connection);
 629                 return err;
 630         }
 631
 632         watch = g_dbus_add_service_watch(connection, SUPPLICANT_NAME,
 633                         supplicant_connect, supplicant_disconnect, NULL, NULL);
 634
 635         if (g_dbus_check_service(connection, SUPPLICANT_NAME) == TRUE)
 636                 supplicant_connect(connection, NULL);
 637
 638         return 0;
 639 }
 640
 641 static void wifi_exit(void)
 642 {
 643         connman_driver_unregister(&network_driver);
 644         connman_driver_unregister(&wifi_driver);
 645
 646         if (watch > 0)
 647                 g_dbus_remove_watch(connection, watch);
 648
 649         supplicant_disconnect(connection, NULL);
 650
 651         dbus_connection_unref(connection);
 652 }
 653
 654 CONNMAN_PLUGIN_DEFINE(wifi, "WiFi interface plugin", VERSION,
 655                                                         wifi_init, wifi_exit)