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         __supplicant_scan(device);
 174
 175         data->inactive_timer = 0;
 176
 177         return FALSE;
 178 }
 179
 180 static void connect_known_networks(struct connman_element *device)
 181 {
 182         struct wifi_data *data = connman_element_get_data(device);
 183         GSList *list;
 184
 185         DBG("");
 186
 187         if (data->inactive_timer > 0) {
 188                 g_source_remove(data->inactive_timer);
 189                 data->inactive_timer = 0;
 190         }
 191
 192         for (list = data->current; list; list = list->next) {
 193                 struct connman_element *element = list->data;
 194
 195                 if (element->policy == CONNMAN_ELEMENT_POLICY_AUTO &&
 196                                                 element->remember == TRUE &&
 197                                                 element->available == TRUE) {
 198                         if (network_enable(element) == 0)
 199                                 return;
 200                 }
 201         }
 202
 203         data->inactive_timer = g_timeout_add_seconds(INACTIVE_TIMEOUT,
 204                                                         inactive_scan, device);
 205 }
 206
 207 static void state_change(struct connman_element *device,
 208                                                 enum supplicant_state state)
 209 {
 210         struct wifi_data *data = connman_element_get_data(device);
 211         struct connman_element *element;
 212
 213         DBG("state %d", state);
 214
 215         if (state == STATE_SCANNING)
 216                 connman_element_set_scanning(device, TRUE);
 217         else
 218                 connman_element_set_scanning(device, FALSE);
 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                 if (connman_element_register(dhcp, element) < 0)
 242                         connman_element_unref(dhcp);
 243         } else if (state == STATE_INACTIVE || state == STATE_DISCONNECTED) {
 244                 data->connected = FALSE;
 245                 connman_element_set_enabled(element, FALSE);
 246
 247                 connman_element_unregister_children(element);
 248         }
 249
 250 reconnect:
 251         if (state == STATE_INACTIVE) {
 252                 data->connected = FALSE;
 253                 connect_known_networks(device);
 254         }
 255 }
 256
 257 static gboolean cleanup_pending(gpointer user_data)
 258 {
 259         struct wifi_data *data = user_data;
 260         GSList *list;
 261
 262         DBG("");
 263
 264         for (list = data->pending; list; list = list->next) {
 265                 struct connman_element *element = list->data;
 266
 267                 DBG("element %p name %s", element, element->name);
 268
 269                 connman_element_unregister(element);
 270                 connman_element_unref(element);
 271         }
 272
 273         g_slist_free(data->pending);
 274         data->pending = NULL;
 275
 276         data->cleanup_timer = 0;
 277
 278         return FALSE;
 279 }
 280
 281 static void clear_results(struct connman_element *device)
 282 {
 283         struct wifi_data *data = connman_element_get_data(device);
 284
 285         DBG("pending %d", g_slist_length(data->pending));
 286         DBG("current %d", g_slist_length(data->current));
 287
 288         if (data->cleanup_timer > 0) {
 289                 g_source_remove(data->cleanup_timer);
 290                 cleanup_pending(data);
 291         }
 292
 293         data->pending = data->current;
 294         data->current = NULL;
 295
 296         data->cleanup_timer = g_timeout_add_seconds(CLEANUP_TIMEOUT,
 297                                                         cleanup_pending, data);
 298 }
 299
 300 static void scan_result(struct connman_element *device,
 301                                         struct supplicant_network *network)
 302 {
 303         struct wifi_data *data = connman_element_get_data(device);
 304         struct connman_element *element;
 305         gchar *temp;
 306         int i;
 307
 308         DBG("network %p identifier %s", network, network->identifier);
 309
 310         if (data == NULL)
 311                 return;
 312
 313         if (network->identifier == NULL)
 314                 return;
 315
 316         if (network->identifier[0] == '\0')
 317                 return;
 318
 319         temp = g_strdup(network->identifier);
 320
 321         for (i = 0; i < strlen(temp); i++) {
 322                 char tmp = temp[i];
 323                 if ((tmp < '0' || tmp > '9') && (tmp < 'A' || tmp > 'Z') &&
 324                                                 (tmp < 'a' || tmp > 'z'))
 325                         temp[i] = '_';
 326         }
 327
 328         element = find_pending_element(data, network->identifier);
 329         if (element == NULL) {
 330                 element = connman_element_create(temp);
 331
 332                 element->type = CONNMAN_ELEMENT_TYPE_NETWORK;
 333                 element->index = device->index;
 334
 335                 connman_element_add_static_property(element, "Name",
 336                                 DBUS_TYPE_STRING, &network->identifier);
 337
 338                 connman_element_add_static_array_property(element, "WiFi.SSID",
 339                         DBUS_TYPE_BYTE, &network->ssid, network->ssid_len);
 340
 341                 if (element->wifi.security == NULL) {
 342                         const char *security;
 343
 344                         if (network->has_rsn == TRUE)
 345                                 security = "wpa2";
 346                         else if (network->has_wpa == TRUE)
 347                                 security = "wpa";
 348                         else if (network->has_wep == TRUE)
 349                                 security = "wep";
 350                         else
 351                                 security = "none";
 352
 353                         element->wifi.security = g_strdup(security);
 354                 }
 355
 356                 element->strength = network->quality;
 357
 358                 connman_element_add_static_property(element, "Strength",
 359                                         DBUS_TYPE_BYTE, &element->strength);
 360
 361                 DBG("%s (%s) strength %d", network->identifier,
 362                                 element->wifi.security, element->strength);
 363
 364                 if (connman_element_register(element, device) < 0) {
 365                         connman_element_unref(element);
 366                         goto done;
 367                 }
 368         } else {
 369                 data->pending = g_slist_remove(data->pending, element);
 370
 371                 if (element->strength != network->quality) {
 372                         element->strength = network->quality;
 373
 374                         connman_element_set_static_property(element, "Strength",
 375                                         DBUS_TYPE_BYTE, &element->strength);
 376
 377                         connman_element_update(element);
 378                 }
 379         }
 380
 381         data->current = g_slist_append(data->current, element);
 382
 383         element->available = TRUE;
 384
 385 done:
 386         g_free(temp);
 387 }
 388
 389 static struct supplicant_callback wifi_callback = {
 390         .state_change   = state_change,
 391         .clear_results  = clear_results,
 392         .scan_result    = scan_result,
 393 };
 394
 395 static int wifi_probe(struct connman_element *element)
 396 {
 397         struct wifi_data *data;
 398
 399         DBG("element %p name %s", element, element->name);
 400
 401         data = g_try_new0(struct wifi_data, 1);
 402         if (data == NULL)
 403                 return -ENOMEM;
 404
 405         data->connected = FALSE;
 406
 407         connman_element_set_data(element, data);
 408
 409         return 0;
 410 }
 411
 412 static void wifi_remove(struct connman_element *element)
 413 {
 414         struct wifi_data *data = connman_element_get_data(element);
 415
 416         DBG("element %p name %s", element, element->name);
 417
 418         connman_element_set_data(element, NULL);
 419
 420         g_free(data->identifier);
 421         g_free(data);
 422 }
 423
 424 static int wifi_update(struct connman_element *element)
 425 {
 426         DBG("element %p name %s", element, element->name);
 427
 428         __supplicant_scan(element);
 429
 430         return 0;
 431 }
 432
 433 static int wifi_enable(struct connman_element *element)
 434 {
 435         int err;
 436
 437         DBG("element %p name %s", element, element->name);
 438
 439         err = __supplicant_start(element, &wifi_callback);
 440         if (err < 0)
 441                 return err;
 442
 443         __supplicant_scan(element);
 444
 445         return 0;
 446 }
 447
 448 static int wifi_disable(struct connman_element *element)
 449 {
 450         struct wifi_data *data = connman_element_get_data(element);
 451         GSList *list;
 452
 453         DBG("element %p name %s", element, element->name);
 454
 455         if (data->cleanup_timer > 0) {
 456                 g_source_remove(data->cleanup_timer);
 457                 cleanup_pending(data);
 458         }
 459
 460         if (data->inactive_timer > 0) {
 461                 g_source_remove(data->inactive_timer);
 462                 data->inactive_timer = 0;
 463         }
 464
 465         __supplicant_disconnect(element);
 466
 467         for (list = data->current; list; list = list->next) {
 468                 struct connman_element *network = list->data;
 469
 470                 connman_element_unref(network);
 471         }
 472
 473         g_slist_free(data->current);
 474         data->current = NULL;
 475
 476         connman_element_unregister_children(element);
 477
 478         __supplicant_stop(element);
 479
 480         return 0;
 481 }
 482
 483 static struct connman_driver wifi_driver = {
 484         .name           = "wifi-device",
 485         .type           = CONNMAN_ELEMENT_TYPE_DEVICE,
 486         .subtype        = CONNMAN_ELEMENT_SUBTYPE_WIFI,
 487         .probe          = wifi_probe,
 488         .remove         = wifi_remove,
 489         .update         = wifi_update,
 490         .enable         = wifi_enable,
 491         .disable        = wifi_disable,
 492 };
 493
 494 static GSList *device_list = NULL;
 495
 496 static void wifi_newlink(unsigned short type, int index,
 497                                         unsigned flags, unsigned change)
 498 {
 499         struct connman_element *device;
 500         GSList *list;
 501         gboolean exists = FALSE;
 502         gchar *name, *devname;
 503         struct iwreq iwr;
 504         int sk;
 505
 506         DBG("index %d", index);
 507
 508         if (type != ARPHRD_ETHER)
 509                 return;
 510
 511         name = inet_index2ident(index, "dev_");
 512         devname = inet_index2name(index);
 513
 514         memset(&iwr, 0, sizeof(iwr));
 515         strncpy(iwr.ifr_ifrn.ifrn_name, devname, IFNAMSIZ);
 516
 517         sk = socket(PF_INET, SOCK_DGRAM, 0);
 518
 519         if (ioctl(sk, SIOCGIWNAME, &iwr) < 0) {
 520                 g_free(name);
 521                 close(sk);
 522                 return;
 523         }
 524
 525         close(sk);
 526
 527         for (list = device_list; list; list = list->next) {
 528                 struct connman_element *device = list->data;
 529
 530                 if (device->index == index) {
 531                         exists = TRUE;
 532                         break;
 533                 }
 534         }
 535
 536         if (exists == TRUE) {
 537                 g_free(name);
 538                 return;
 539         }
 540
 541         device = connman_element_create(NULL);
 542         device->type = CONNMAN_ELEMENT_TYPE_DEVICE;
 543         device->subtype = CONNMAN_ELEMENT_SUBTYPE_WIFI;
 544
 545         device->index = index;
 546         device->name = name;
 547         device->devname = devname;
 548
 549         if (connman_element_register(device, NULL) < 0) {
 550                 connman_element_unregister(device);
 551                 return;
 552         }
 553
 554         device_list = g_slist_append(device_list, device);
 555 }
 556
 557 static void wifi_dellink(unsigned short type, int index,
 558                                         unsigned flags, unsigned change)
 559 {
 560         GSList *list;
 561
 562         DBG("index %d", index);
 563
 564         for (list = device_list; list; list = list->next) {
 565                 struct connman_element *device = list->data;
 566
 567                 if (device->index == index) {
 568                         device_list = g_slist_remove(device_list, device);
 569                         connman_element_unregister(device);
 570                         connman_element_unref(device);
 571                         break;
 572                 }
 573         }
 574 }
 575
 576 static struct connman_rtnl wifi_rtnl = {
 577         .name           = "wifi",
 578         .newlink        = wifi_newlink,
 579         .dellink        = wifi_dellink,
 580 };
 581
 582 static void supplicant_connect(DBusConnection *connection, void *user_data)
 583 {
 584         DBG("connection %p", connection);
 585
 586         __supplicant_init(connection);
 587
 588         if (connman_rtnl_register(&wifi_rtnl) < 0)
 589                 return;
 590
 591         connman_rtnl_send_getlink();
 592 }
 593
 594 static void supplicant_disconnect(DBusConnection *connection, void *user_data)
 595 {
 596         GSList *list;
 597
 598         DBG("connection %p", connection);
 599
 600         connman_rtnl_unregister(&wifi_rtnl);
 601
 602         for (list = device_list; list; list = list->next) {
 603                 struct connman_element *device = list->data;
 604
 605                 connman_element_unregister(device);
 606                 connman_element_unref(device);
 607         }
 608
 609         g_slist_free(device_list);
 610         device_list = NULL;
 611
 612         __supplicant_exit();
 613 }
 614
 615 static DBusConnection *connection;
 616 static guint watch;
 617
 618 static int wifi_init(void)
 619 {
 620         int err;
 621
 622         connection = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
 623         if (connection == NULL)
 624                 return -EIO;
 625
 626         err = connman_driver_register(&network_driver);
 627         if (err < 0) {
 628                 dbus_connection_unref(connection);
 629                 return err;
 630         }
 631
 632         err = connman_driver_register(&wifi_driver);
 633         if (err < 0) {
 634                 connman_driver_unregister(&network_driver);
 635                 dbus_connection_unref(connection);
 636                 return err;
 637         }
 638
 639         watch = g_dbus_add_service_watch(connection, SUPPLICANT_NAME,
 640                         supplicant_connect, supplicant_disconnect, NULL, NULL);
 641
 642         if (g_dbus_check_service(connection, SUPPLICANT_NAME) == TRUE)
 643                 supplicant_connect(connection, NULL);
 644         else
 645                 __supplicant_activate(connection);
 646
 647         return 0;
 648 }
 649
 650 static void wifi_exit(void)
 651 {
 652         connman_driver_unregister(&network_driver);
 653         connman_driver_unregister(&wifi_driver);
 654
 655         if (watch > 0)
 656                 g_dbus_remove_watch(connection, watch);
 657
 658         supplicant_disconnect(connection, NULL);
 659
 660         dbus_connection_unref(connection);
 661 }
 662
 663 CONNMAN_PLUGIN_DEFINE(wifi, "WiFi interface plugin", VERSION,
 664                                                         wifi_init, wifi_exit)