plugins/wifi.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2010  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 <unistd.h>
  27 #include <errno.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 #include <net/ethernet.h>
  34
  35 #ifndef IFF_LOWER_UP
  36 #define IFF_LOWER_UP    0x10000
  37 #endif
  38
  39 #include <dbus/dbus.h>
  40 #include <glib.h>
  41
  42 #define CONNMAN_API_SUBJECT_TO_CHANGE
  43 #include <connman/plugin.h>
  44 #include <connman/inet.h>
  45 #include <connman/device.h>
  46 #include <connman/rtnl.h>
  47 #include <connman/log.h>
  48
  49 #include <gsupplicant/gsupplicant.h>
  50
  51 #define CLEANUP_TIMEOUT   8     /* in seconds */
  52 #define INACTIVE_TIMEOUT  12    /* in seconds */
  53
  54 struct wifi_data {
  55         char *identifier;
  56         struct connman_device *device;
  57         struct connman_network *network;
  58         GSupplicantInterface *interface;
  59         connman_bool_t connected;
  60         int index;
  61         unsigned flags;
  62         unsigned int watch;
  63 };
  64
  65 static int get_bssid(struct connman_device *device,
  66                                 unsigned char *bssid, unsigned int *bssid_len)
  67 {
  68         struct iwreq wrq;
  69         char *ifname;
  70         int ifindex;
  71         int fd, err;
  72
  73         ifindex = connman_device_get_index(device);
  74         if (ifindex < 0)
  75                 return -EINVAL;
  76
  77         ifname = connman_inet_ifname(ifindex);
  78         if (ifname == NULL)
  79                 return -EINVAL;
  80
  81         fd = socket(PF_INET, SOCK_DGRAM, 0);
  82         if (fd < 0) {
  83                 g_free(ifname);
  84                 return -EINVAL;
  85         }
  86
  87         memset(&wrq, 0, sizeof(wrq));
  88         strncpy(wrq.ifr_name, ifname, IFNAMSIZ);
  89
  90         err = ioctl(fd, SIOCGIWAP, &wrq);
  91
  92         g_free(ifname);
  93         close(fd);
  94
  95         if (err < 0)
  96                 return -EIO;
  97
  98         memcpy(bssid, wrq.u.ap_addr.sa_data, ETH_ALEN);
  99         *bssid_len = ETH_ALEN;
 100
 101         return 0;
 102 }
 103
 104 static void wifi_newlink(unsigned flags, unsigned change, void *user_data)
 105 {
 106         struct connman_device *device = user_data;
 107         struct wifi_data *wifi = connman_device_get_data(device);
 108
 109         DBG("index %d flags %d change %d", wifi->index, flags, change);
 110
 111         if (!change)
 112                 return;
 113
 114         if ((wifi->flags & IFF_UP) != (flags & IFF_UP)) {
 115                 if (flags & IFF_UP)
 116                         DBG("interface up");
 117                 else
 118                         DBG("interface down");
 119         }
 120
 121         if ((wifi->flags & IFF_LOWER_UP) != (flags & IFF_LOWER_UP)) {
 122                 if (flags & IFF_LOWER_UP)
 123                         DBG("carrier on");
 124                 else
 125                         DBG("carrier off");
 126         }
 127
 128         wifi->flags = flags;
 129 }
 130
 131 static int wifi_probe(struct connman_device *device)
 132 {
 133         struct wifi_data *wifi;
 134
 135         DBG("device %p", device);
 136
 137         wifi = g_try_new0(struct wifi_data, 1);
 138         if (wifi == NULL)
 139                 return -ENOMEM;
 140
 141         wifi->connected = FALSE;
 142
 143         connman_device_set_data(device, wifi);
 144         wifi->device = connman_device_ref(device);
 145
 146         wifi->index = connman_device_get_index(device);
 147         wifi->flags = 0;
 148
 149         wifi->watch = connman_rtnl_add_newlink_watch(wifi->index,
 150                                                         wifi_newlink, device);
 151
 152         return 0;
 153 }
 154
 155 static void wifi_remove(struct connman_device *device)
 156 {
 157         struct wifi_data *wifi = connman_device_get_data(device);
 158
 159         DBG("device %p", device);
 160
 161         connman_device_set_data(device, NULL);
 162         connman_device_unref(wifi->device);
 163         connman_rtnl_remove_watch(wifi->watch);
 164
 165         g_free(wifi->identifier);
 166         g_free(wifi);
 167 }
 168
 169 static void interface_create_callback(int result,
 170                                         GSupplicantInterface *interface,
 171                                                         void *user_data)
 172 {
 173         struct wifi_data *wifi = user_data;
 174
 175         DBG("result %d ifname %s", result,
 176                                 g_supplicant_interface_get_ifname(interface));
 177
 178         if (result < 0)
 179                 return;
 180
 181         wifi->interface = interface;
 182         g_supplicant_interface_set_data(interface, wifi);
 183 }
 184
 185 static void interface_remove_callback(int result,
 186                                         GSupplicantInterface *interface,
 187                                                         void *user_data)
 188 {
 189         struct wifi_data *wifi = user_data;
 190
 191         DBG("result %d", result);
 192
 193         if (result < 0)
 194                 return;
 195
 196         wifi->interface = NULL;
 197 }
 198
 199
 200 static int wifi_enable(struct connman_device *device)
 201 {
 202         struct wifi_data *wifi = connman_device_get_data(device);
 203         const char *interface = connman_device_get_string(device, "Interface");
 204
 205         DBG("device %p %p", device, wifi);
 206
 207         return g_supplicant_interface_create(interface, "nl80211,wext",
 208                                                 interface_create_callback,
 209                                                         wifi);
 210 }
 211
 212 static int wifi_disable(struct connman_device *device)
 213 {
 214         struct wifi_data *wifi = connman_device_get_data(device);
 215
 216         DBG("device %p", device);
 217
 218         wifi->connected = FALSE;
 219
 220         return g_supplicant_interface_remove(wifi->interface,
 221                                                 interface_remove_callback,
 222                                                         wifi);
 223 }
 224
 225 static void scan_callback(int result, GSupplicantInterface *interface,
 226                                                 void *user_data)
 227 {
 228         struct connman_device *device = user_data;
 229
 230         DBG("result %d", result);
 231
 232         if (result < 0) {
 233                 connman_device_set_scanning(device, FALSE);
 234                 return;
 235         }
 236
 237         connman_device_set_scanning(device, TRUE);
 238 }
 239
 240 static int wifi_scan(struct connman_device *device)
 241 {
 242         struct wifi_data *wifi = connman_device_get_data(device);
 243
 244         DBG("device %p %p", device, wifi->interface);
 245
 246         return g_supplicant_interface_scan(wifi->interface, scan_callback,
 247                                                                 device);
 248 }
 249
 250 static struct connman_device_driver wifi_ng_driver = {
 251         .name           = "wifi",
 252         .type           = CONNMAN_DEVICE_TYPE_WIFI,
 253         .priority       = CONNMAN_DEVICE_PRIORITY_LOW,
 254         .probe          = wifi_probe,
 255         .remove         = wifi_remove,
 256         .enable         = wifi_enable,
 257         .disable        = wifi_disable,
 258         .scan           = wifi_scan,
 259 };
 260
 261 static void system_ready(void)
 262 {
 263         DBG("");
 264
 265         if (connman_device_driver_register(&wifi_ng_driver) < 0)
 266                 connman_error("Failed to register WiFi driver");
 267 }
 268
 269 static void system_killed(void)
 270 {
 271         DBG("");
 272
 273         connman_device_driver_unregister(&wifi_ng_driver);
 274 }
 275
 276 static void interface_added(GSupplicantInterface *interface)
 277 {
 278         const char *ifname = g_supplicant_interface_get_ifname(interface);
 279         const char *driver = g_supplicant_interface_get_driver(interface);
 280         struct wifi_data *wifi;
 281
 282         wifi = (struct wifi_data *)g_supplicant_interface_get_data(interface);
 283
 284         DBG("ifname %s driver %s wifi %p", ifname, driver, wifi);
 285
 286         if (wifi == NULL || wifi->device == NULL) {
 287                 connman_error("Wrong wifi pointer");
 288                 return;
 289         }
 290
 291         connman_device_set_powered(wifi->device, TRUE);
 292         wifi_scan(wifi->device);
 293 }
 294
 295 static void interface_state(GSupplicantInterface *interface)
 296 {
 297         struct connman_network *network;
 298         struct connman_device *device;
 299         struct wifi_data *wifi;
 300         GSupplicantState state = g_supplicant_interface_get_state(interface);
 301         unsigned char bssid[ETH_ALEN];
 302         unsigned int bssid_len;
 303
 304         wifi = (struct wifi_data *) g_supplicant_interface_get_data(interface);
 305
 306         DBG("wifi %p interface state %d", wifi, state);
 307
 308         if (wifi == NULL)
 309                 return;
 310
 311         network = wifi->network;
 312         device = wifi->device;
 313
 314         if (device == NULL || network == NULL)
 315                 return;
 316
 317         switch (state) {
 318         case G_SUPPLICANT_STATE_SCANNING:
 319                 connman_device_set_scanning(device, TRUE);
 320                 break;
 321
 322         case G_SUPPLICANT_STATE_AUTHENTICATING:
 323         case G_SUPPLICANT_STATE_ASSOCIATING:
 324                 connman_network_set_associating(network, TRUE);
 325                 break;
 326
 327         case G_SUPPLICANT_STATE_COMPLETED:
 328                 /* reset scan trigger and schedule background scan */
 329                 connman_device_schedule_scan(device);
 330
 331                 if (get_bssid(device, bssid, &bssid_len) == 0)
 332                         connman_network_set_address(network,
 333                                                         bssid, bssid_len);
 334                 connman_network_set_connected(network, TRUE);
 335                 break;
 336
 337         case G_SUPPLICANT_STATE_DISCONNECTED:
 338                 connman_network_set_connected(network, FALSE);
 339                 break;
 340
 341         case G_SUPPLICANT_STATE_INACTIVE:
 342                 break;
 343
 344         case G_SUPPLICANT_STATE_UNKNOWN:
 345         case G_SUPPLICANT_STATE_ASSOCIATED:
 346         case G_SUPPLICANT_STATE_4WAY_HANDSHAKE:
 347         case G_SUPPLICANT_STATE_GROUP_HANDSHAKE:
 348                 break;
 349         }
 350
 351         DBG("DONE");
 352 }
 353
 354 static void interface_removed(GSupplicantInterface *interface)
 355 {
 356         const char *ifname = g_supplicant_interface_get_ifname(interface);
 357         struct wifi_data *wifi;
 358
 359         DBG("ifname %s", ifname);
 360
 361         wifi = (struct wifi_data *)g_supplicant_interface_get_data(interface);
 362
 363         if (wifi == NULL || wifi->device == NULL) {
 364                 connman_error("Wrong wifi pointer");
 365                 return;
 366         }
 367
 368         connman_device_set_powered(wifi->device, FALSE);
 369 }
 370
 371 static void scan_started(GSupplicantInterface *interface)
 372 {
 373         struct wifi_data *wifi;
 374
 375         DBG("");
 376
 377         wifi = (struct wifi_data *)g_supplicant_interface_get_data(interface);
 378
 379         if (wifi == NULL)
 380                 return;
 381
 382         if (wifi->device)
 383                 connman_device_set_scanning(wifi->device, TRUE);
 384 }
 385
 386 static void scan_finished(GSupplicantInterface *interface)
 387 {
 388         struct wifi_data *wifi;
 389
 390         DBG("");
 391
 392         wifi = (struct wifi_data *)g_supplicant_interface_get_data(interface);
 393
 394         if (wifi == NULL)
 395                 return;
 396 }
 397
 398 static unsigned char calculate_strength(GSupplicantNetwork *supplicant_network)
 399 {
 400         unsigned char strength;
 401
 402         strength = 120 + g_supplicant_network_get_signal(supplicant_network);
 403         if (strength > 100)
 404                 strength = 100;
 405
 406         return strength;
 407 }
 408
 409 static void network_added(GSupplicantNetwork *supplicant_network)
 410 {
 411         struct connman_network *network;
 412         GSupplicantInterface *interface;
 413         struct wifi_data *wifi;
 414         const char *name, *path, *identifier, *mode, *security, *group;
 415         unsigned char *ssid;
 416         unsigned int ssid_len;
 417
 418         DBG("");
 419
 420         interface = g_supplicant_network_get_interface(supplicant_network);
 421         wifi = (struct wifi_data *) g_supplicant_interface_get_data(interface);
 422         name = g_supplicant_network_get_name(supplicant_network);
 423         path = g_supplicant_network_get_path(supplicant_network);
 424         identifier = g_supplicant_network_get_identifier(supplicant_network);
 425         mode = g_supplicant_network_get_mode(supplicant_network);
 426         security = g_supplicant_network_get_security(supplicant_network);
 427         group = g_supplicant_network_get_identifier(supplicant_network);
 428
 429         if (wifi == NULL)
 430                 return;
 431
 432         ssid = (unsigned char *)g_supplicant_network_get_ssid(supplicant_network, &ssid_len);
 433
 434         network = connman_device_get_network(wifi->device, path);
 435
 436         if (network == NULL) {
 437                 network = connman_network_create(identifier,
 438                                                 CONNMAN_NETWORK_TYPE_WIFI);
 439                 if (network == NULL)
 440                         return;
 441
 442                 connman_network_set_index(network, wifi->index);
 443
 444                 connman_network_set_protocol(network,
 445                                                 CONNMAN_NETWORK_PROTOCOL_IP);
 446
 447                 if (connman_device_add_network(wifi->device, network) < 0) {
 448                         connman_network_unref(network);
 449                         return;
 450                 }
 451         }
 452
 453         if (name != NULL && name[0] != '\0')
 454                 connman_network_set_name(network, name);
 455
 456         connman_network_set_blob(network, "WiFi.SSID",
 457                                                 ssid, ssid_len);
 458         connman_network_set_string(network, "WiFi.Mode", mode);
 459         connman_network_set_string(network, "WiFi.Security", security);
 460         connman_network_set_strength(network,
 461                                 calculate_strength(supplicant_network));
 462
 463         connman_network_set_available(network, TRUE);
 464
 465         if (ssid != NULL)
 466                 connman_network_set_group(network, group);
 467 }
 468
 469 static void network_removed(GSupplicantNetwork *network)
 470 {
 471         const char *name = g_supplicant_network_get_name(network);
 472
 473         DBG("* name %s", name);
 474 }
 475
 476 static const GSupplicantCallbacks callbacks = {
 477         .system_ready           = system_ready,
 478         .system_killed          = system_killed,
 479         .interface_added        = interface_added,
 480         .interface_state        = interface_state,
 481         .interface_removed      = interface_removed,
 482         .scan_started           = scan_started,
 483         .scan_finished          = scan_finished,
 484         .network_added          = network_added,
 485         .network_removed        = network_removed,
 486 };
 487
 488
 489 static int network_probe(struct connman_network *network)
 490 {
 491         DBG("network %p", network);
 492
 493         return 0;
 494 }
 495
 496 static void network_remove(struct connman_network *network)
 497 {
 498         DBG("network %p", network);
 499 }
 500
 501 static void connect_callback(int result, GSupplicantInterface *interface,
 502                                                         void *user_data)
 503 {
 504         connman_error("%s", __func__);
 505 }
 506
 507 static void disconnect_callback(int result, GSupplicantInterface *interface,
 508                                                         void *user_data)
 509 {
 510         struct wifi_data *wifi = user_data;
 511
 512         if (result < 0) {
 513                 connman_error("%s", __func__);
 514                 return;
 515         }
 516
 517         connman_network_unref(wifi->network);
 518
 519         wifi->network = NULL;
 520 }
 521
 522
 523 static GSupplicantSecurity network_security(const char *security)
 524 {
 525         if (g_str_equal(security, "none") == TRUE)
 526                 return G_SUPPLICANT_SECURITY_NONE;
 527         else if (g_str_equal(security, "wep") == TRUE)
 528                 return G_SUPPLICANT_SECURITY_WEP;
 529         else if (g_str_equal(security, "psk") == TRUE)
 530                 return G_SUPPLICANT_SECURITY_PSK;
 531         else if (g_str_equal(security, "wpa") == TRUE)
 532                 return G_SUPPLICANT_SECURITY_PSK;
 533         else if (g_str_equal(security, "rsn") == TRUE)
 534                 return G_SUPPLICANT_SECURITY_PSK;
 535         else if (g_str_equal(security, "ieee8021x") == TRUE)
 536                 return G_SUPPLICANT_SECURITY_IEEE8021X;
 537
 538         return G_SUPPLICANT_SECURITY_UNKNOWN;
 539 }
 540
 541 static void ssid_init(GSupplicantSSID *ssid, struct connman_network *network)
 542 {
 543         const char *security;
 544
 545         memset(ssid, 0, sizeof(*ssid));
 546         ssid->ssid = connman_network_get_blob(network, "WiFi.SSID",
 547                                                 &ssid->ssid_len);
 548         security = connman_network_get_string(network, "WiFi.Security");
 549         ssid->security = network_security(security);
 550         ssid->passphrase = connman_network_get_string(network,
 551                                                         "WiFi.Passphrase");
 552         ssid->eap = connman_network_get_string(network, "WiFi.EAP");
 553
 554         /*
 555          * If our private key password is unset,
 556          * we use the supplied passphrase. That is needed
 557          * for PEAP where 2 passphrases (identity and client
 558          * cert may have to be provided.
 559          */
 560         if (connman_network_get_string(network,
 561                                         "WiFi.PrivateKeyPassphrase") == NULL)
 562                 connman_network_set_string(network,
 563                                                 "WiFi.PrivateKeyPassphrase",
 564                                                 ssid->passphrase);
 565         /* We must have an identity for both PEAP and TLS */
 566         ssid->identity = connman_network_get_string(network, "WiFi.Identity");
 567         ssid->ca_cert_path = connman_network_get_string(network,
 568                                                         "WiFi.CACertFile");
 569         ssid->client_cert_path = connman_network_get_string(network,
 570                                                         "WiFi.ClientCertFile");
 571         ssid->private_key_path = connman_network_get_string(network,
 572                                                         "WiFi.PrivateKeyFile");
 573         ssid->private_key_passphrase = connman_network_get_string(network,
 574                                                 "WiFi.PrivateKeyPassphrase");
 575         ssid->phase2_auth = connman_network_get_string(network, "WiFi.Phase2");
 576
 577 }
 578
 579 static int network_connect(struct connman_network *network)
 580 {
 581         struct connman_device *device = connman_network_get_device(network);
 582         struct wifi_data *wifi;
 583         GSupplicantInterface *interface;
 584         GSupplicantSSID ssid;
 585
 586         DBG("network %p", network);
 587
 588         if (device == NULL)
 589                 return -ENODEV;
 590
 591         wifi = connman_device_get_data(device);
 592         if (wifi == NULL)
 593                 return -ENODEV;
 594
 595         interface = wifi->interface;
 596
 597         ssid_init(&ssid, network);
 598
 599         wifi->network = connman_network_ref(network);
 600
 601         return g_supplicant_interface_connect(interface, &ssid,
 602                                                 connect_callback, NULL);
 603 }
 604
 605 static int network_disconnect(struct connman_network *network)
 606 {
 607         struct connman_device *device = connman_network_get_device(network);
 608         struct wifi_data *wifi;
 609
 610         DBG("network %p", network);
 611
 612         wifi = connman_device_get_data(device);
 613         if (wifi == NULL || wifi->interface == NULL)
 614                 return -ENODEV;
 615
 616         return g_supplicant_interface_disconnect(wifi->interface,
 617                                                 disconnect_callback, wifi);
 618 }
 619
 620 static struct connman_network_driver network_driver = {
 621         .name           = "wifi",
 622         .type           = CONNMAN_NETWORK_TYPE_WIFI,
 623         .priority       = CONNMAN_NETWORK_PRIORITY_LOW,
 624         .probe          = network_probe,
 625         .remove         = network_remove,
 626         .connect        = network_connect,
 627         .disconnect     = network_disconnect,
 628 };
 629
 630 static int wifi_init(void)
 631 {
 632         int err;
 633
 634         err = connman_network_driver_register(&network_driver);
 635         if (err < 0)
 636                 return err;
 637
 638         err = g_supplicant_register(&callbacks);
 639         if (err < 0) {
 640                 connman_network_driver_unregister(&network_driver);
 641                 return err;
 642         }
 643
 644         return 0;
 645 }
 646
 647 static void wifi_exit(void)
 648 {
 649         DBG();
 650
 651         g_supplicant_unregister(&callbacks);
 652
 653         connman_network_driver_unregister(&network_driver);
 654 }
 655
 656 CONNMAN_PLUGIN_DEFINE(wifi, "WiFi interface plugin", VERSION,
 657                 CONNMAN_PLUGIN_PRIORITY_DEFAULT, wifi_init, wifi_exit)