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 (state == STATE_SCANNING)
 221                 connman_element_set_scanning(device, TRUE);
 222         else
 223                 connman_element_set_scanning(device, FALSE);
 224
 225         if (data == NULL)
 226                 return;
 227
 228         if (data->identifier == NULL)
 229                 goto reconnect;
 230
 231         element = find_current_element(data, data->identifier);
 232         if (element == NULL)
 233                 goto reconnect;
 234
 235         if (state == STATE_COMPLETED) {
 236                 struct connman_element *dhcp;
 237
 238                 data->connected = TRUE;
 239                 connman_element_set_enabled(element, TRUE);
 240
 241                 dhcp = connman_element_create(NULL);
 242
 243                 dhcp->type = CONNMAN_ELEMENT_TYPE_DHCP;
 244                 dhcp->index = element->index;
 245
 246                 if (connman_element_register(dhcp, element) < 0)
 247                         connman_element_unref(dhcp);
 248         } else if (state == STATE_INACTIVE || state == STATE_DISCONNECTED) {
 249                 data->connected = FALSE;
 250                 connman_element_set_enabled(element, FALSE);
 251
 252                 connman_element_unregister_children(element);
 253         }
 254
 255 reconnect:
 256         if (state == STATE_INACTIVE) {
 257                 data->connected = FALSE;
 258                 connect_known_networks(device);
 259         }
 260 }
 261
 262 static gboolean cleanup_pending(gpointer user_data)
 263 {
 264         struct wifi_data *data = user_data;
 265         GSList *list;
 266
 267         DBG("");
 268
 269         for (list = data->pending; list; list = list->next) {
 270                 struct connman_element *element = list->data;
 271
 272                 DBG("element %p name %s", element, element->name);
 273
 274                 connman_element_unregister(element);
 275                 connman_element_unref(element);
 276         }
 277
 278         g_slist_free(data->pending);
 279         data->pending = NULL;
 280
 281         data->cleanup_timer = 0;
 282
 283         return FALSE;
 284 }
 285
 286 static void clear_results(struct connman_element *device)
 287 {
 288         struct wifi_data *data = connman_element_get_data(device);
 289
 290         DBG("pending %d", g_slist_length(data->pending));
 291         DBG("current %d", g_slist_length(data->current));
 292
 293         data->pending = data->current;
 294         data->current = NULL;
 295
 296         if (data->cleanup_timer > 0)
 297                 return;
 298
 299         data->cleanup_timer = g_timeout_add_seconds(CLEANUP_TIMEOUT,
 300                                                         cleanup_pending, data);
 301 }
 302
 303 static void scan_result(struct connman_element *device,
 304                                         struct supplicant_network *network)
 305 {
 306         struct wifi_data *data = connman_element_get_data(device);
 307         struct connman_element *element;
 308         gchar *temp;
 309         int i;
 310
 311         DBG("network %p identifier %s", network, network->identifier);
 312
 313         if (data == NULL)
 314                 return;
 315
 316         if (network->identifier == NULL)
 317                 return;
 318
 319         if (network->identifier[0] == '\0')
 320                 return;
 321
 322         temp = g_strdup(network->identifier);
 323
 324         for (i = 0; i < strlen(temp); i++) {
 325                 char tmp = temp[i];
 326                 if ((tmp < '0' || tmp > '9') && (tmp < 'A' || tmp > 'Z') &&
 327                                                 (tmp < 'a' || tmp > 'z'))
 328                         temp[i] = '_';
 329         }
 330
 331         element = find_pending_element(data, network->identifier);
 332         if (element == NULL) {
 333                 element = connman_element_create(temp);
 334
 335                 element->type = CONNMAN_ELEMENT_TYPE_NETWORK;
 336                 element->index = device->index;
 337
 338                 connman_element_add_static_property(element, "Name",
 339                                 DBUS_TYPE_STRING, &network->identifier);
 340
 341                 connman_element_add_static_array_property(element, "WiFi.SSID",
 342                         DBUS_TYPE_BYTE, &network->ssid, network->ssid_len);
 343
 344                 if (element->wifi.security == NULL) {
 345                         const char *security;
 346
 347                         if (network->has_rsn == TRUE)
 348                                 security = "wpa2";
 349                         else if (network->has_wpa == TRUE)
 350                                 security = "wpa";
 351                         else if (network->has_wep == TRUE)
 352                                 security = "wep";
 353                         else
 354                                 security = "none";
 355
 356                         element->wifi.security = g_strdup(security);
 357                 }
 358
 359                 element->strength = network->quality;
 360
 361                 connman_element_add_static_property(element, "Strength",
 362                                         DBUS_TYPE_BYTE, &element->strength);
 363
 364                 DBG("%s (%s) strength %d", network->identifier,
 365                                 element->wifi.security, element->strength);
 366
 367                 if (connman_element_register(element, device) < 0) {
 368                         connman_element_unref(element);
 369                         goto done;
 370                 }
 371         } else {
 372                 data->pending = g_slist_remove(data->pending, element);
 373
 374                 if (element->strength != network->quality) {
 375                         element->strength = network->quality;
 376
 377                         connman_element_set_static_property(element, "Strength",
 378                                         DBUS_TYPE_BYTE, &element->strength);
 379
 380                         connman_element_update(element);
 381                 }
 382         }
 383
 384         data->current = g_slist_append(data->current, element);
 385
 386         element->available = TRUE;
 387
 388 done:
 389         g_free(temp);
 390 }
 391
 392 static struct supplicant_callback wifi_callback = {
 393         .state_change   = state_change,
 394         .clear_results  = clear_results,
 395         .scan_result    = scan_result,
 396 };
 397
 398 static int wifi_probe(struct connman_element *element)
 399 {
 400         struct wifi_data *data;
 401
 402         DBG("element %p name %s", element, element->name);
 403
 404         data = g_try_new0(struct wifi_data, 1);
 405         if (data == NULL)
 406                 return -ENOMEM;
 407
 408         data->connected = FALSE;
 409
 410         connman_element_set_data(element, data);
 411
 412         return 0;
 413 }
 414
 415 static void wifi_remove(struct connman_element *element)
 416 {
 417         struct wifi_data *data = connman_element_get_data(element);
 418
 419         DBG("element %p name %s", element, element->name);
 420
 421         connman_element_set_data(element, NULL);
 422
 423         g_free(data->identifier);
 424         g_free(data);
 425 }
 426
 427 static int wifi_update(struct connman_element *element)
 428 {
 429         DBG("element %p name %s", element, element->name);
 430
 431         __supplicant_scan(element);
 432
 433         return 0;
 434 }
 435
 436 static int wifi_enable(struct connman_element *element)
 437 {
 438         int err;
 439
 440         DBG("element %p name %s", element, element->name);
 441
 442         err = __supplicant_start(element, &wifi_callback);
 443         if (err < 0)
 444                 return err;
 445
 446         __supplicant_scan(element);
 447
 448         return 0;
 449 }
 450
 451 static int wifi_disable(struct connman_element *element)
 452 {
 453         struct wifi_data *data = connman_element_get_data(element);
 454         GSList *list;
 455
 456         DBG("element %p name %s", element, element->name);
 457
 458         if (data->cleanup_timer > 0) {
 459                 g_source_remove(data->cleanup_timer);
 460                 data->cleanup_timer = 0;
 461         }
 462
 463         if (data->inactive_timer > 0) {
 464                 g_source_remove(data->inactive_timer);
 465                 data->inactive_timer = 0;
 466         }
 467
 468         __supplicant_disconnect(element);
 469
 470         for (list = data->pending; list; list = list->next) {
 471                 struct connman_element *network = list->data;
 472
 473                 connman_element_unref(network);
 474         }
 475
 476         g_slist_free(data->pending);
 477         data->pending = NULL;
 478
 479         for (list = data->current; list; list = list->next) {
 480                 struct connman_element *network = list->data;
 481
 482                 connman_element_unref(network);
 483         }
 484
 485         g_slist_free(data->current);
 486         data->current = NULL;
 487
 488         connman_element_unregister_children(element);
 489
 490         __supplicant_stop(element);
 491
 492         return 0;
 493 }
 494
 495 static struct connman_driver wifi_driver = {
 496         .name           = "wifi-device",
 497         .type           = CONNMAN_ELEMENT_TYPE_DEVICE,
 498         .subtype        = CONNMAN_ELEMENT_SUBTYPE_WIFI,
 499         .probe          = wifi_probe,
 500         .remove         = wifi_remove,
 501         .update         = wifi_update,
 502         .enable         = wifi_enable,
 503         .disable        = wifi_disable,
 504 };
 505
 506 static GSList *device_list = NULL;
 507
 508 static void wifi_newlink(unsigned short type, int index,
 509                                         unsigned flags, unsigned change)
 510 {
 511         struct connman_element *device;
 512         GSList *list;
 513         gboolean exists = FALSE;
 514         gchar *name, *devname;
 515         struct iwreq iwr;
 516         int sk;
 517
 518         DBG("index %d", index);
 519
 520         if (type != ARPHRD_ETHER)
 521                 return;
 522
 523         name = inet_index2ident(index, "dev_");
 524         devname = inet_index2name(index);
 525
 526         memset(&iwr, 0, sizeof(iwr));
 527         strncpy(iwr.ifr_ifrn.ifrn_name, devname, IFNAMSIZ);
 528
 529         sk = socket(PF_INET, SOCK_DGRAM, 0);
 530
 531         if (ioctl(sk, SIOCGIWNAME, &iwr) < 0) {
 532                 g_free(name);
 533                 close(sk);
 534                 return;
 535         }
 536
 537         close(sk);
 538
 539         for (list = device_list; list; list = list->next) {
 540                 struct connman_element *device = list->data;
 541
 542                 if (device->index == index) {
 543                         exists = TRUE;
 544                         break;
 545                 }
 546         }
 547
 548         if (exists == TRUE) {
 549                 g_free(name);
 550                 return;
 551         }
 552
 553         device = connman_element_create(NULL);
 554         device->type = CONNMAN_ELEMENT_TYPE_DEVICE;
 555         device->subtype = CONNMAN_ELEMENT_SUBTYPE_WIFI;
 556
 557         device->index = index;
 558         device->name = name;
 559         device->devname = devname;
 560
 561         if (connman_element_register(device, NULL) < 0) {
 562                 connman_element_unregister(device);
 563                 return;
 564         }
 565
 566         device_list = g_slist_append(device_list, device);
 567 }
 568
 569 static void wifi_dellink(unsigned short type, int index,
 570                                         unsigned flags, unsigned change)
 571 {
 572         GSList *list;
 573
 574         DBG("index %d", index);
 575
 576         for (list = device_list; list; list = list->next) {
 577                 struct connman_element *device = list->data;
 578
 579                 if (device->index == index) {
 580                         device_list = g_slist_remove(device_list, device);
 581                         connman_element_unregister(device);
 582                         connman_element_unref(device);
 583                         break;
 584                 }
 585         }
 586 }
 587
 588 static struct connman_rtnl wifi_rtnl = {
 589         .name           = "wifi",
 590         .newlink        = wifi_newlink,
 591         .dellink        = wifi_dellink,
 592 };
 593
 594 static void supplicant_connect(DBusConnection *connection, void *user_data)
 595 {
 596         DBG("connection %p", connection);
 597
 598         __supplicant_init(connection);
 599
 600         if (connman_rtnl_register(&wifi_rtnl) < 0)
 601                 return;
 602
 603         connman_rtnl_send_getlink();
 604 }
 605
 606 static void supplicant_disconnect(DBusConnection *connection, void *user_data)
 607 {
 608         GSList *list;
 609
 610         DBG("connection %p", connection);
 611
 612         connman_rtnl_unregister(&wifi_rtnl);
 613
 614         for (list = device_list; list; list = list->next) {
 615                 struct connman_element *device = list->data;
 616
 617                 connman_element_unregister(device);
 618                 connman_element_unref(device);
 619         }
 620
 621         g_slist_free(device_list);
 622         device_list = NULL;
 623
 624         __supplicant_exit();
 625 }
 626
 627 static DBusConnection *connection;
 628 static guint watch;
 629
 630 static int wifi_init(void)
 631 {
 632         int err;
 633
 634         connection = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
 635         if (connection == NULL)
 636                 return -EIO;
 637
 638         err = connman_driver_register(&network_driver);
 639         if (err < 0) {
 640                 dbus_connection_unref(connection);
 641                 return err;
 642         }
 643
 644         err = connman_driver_register(&wifi_driver);
 645         if (err < 0) {
 646                 connman_driver_unregister(&network_driver);
 647                 dbus_connection_unref(connection);
 648                 return err;
 649         }
 650
 651         watch = g_dbus_add_service_watch(connection, SUPPLICANT_NAME,
 652                         supplicant_connect, supplicant_disconnect, NULL, NULL);
 653
 654         if (g_dbus_check_service(connection, SUPPLICANT_NAME) == TRUE)
 655                 supplicant_connect(connection, NULL);
 656         else
 657                 __supplicant_activate(connection);
 658
 659         return 0;
 660 }
 661
 662 static void wifi_exit(void)
 663 {
 664         connman_driver_unregister(&network_driver);
 665         connman_driver_unregister(&wifi_driver);
 666
 667         if (watch > 0)
 668                 g_dbus_remove_watch(connection, watch);
 669
 670         supplicant_disconnect(connection, NULL);
 671
 672         dbus_connection_unref(connection);
 673 }
 674
 675 CONNMAN_PLUGIN_DEFINE(wifi, "WiFi interface plugin", VERSION,
 676                                                         wifi_init, wifi_exit)