src/wifi-bssid-scan.c

   1 /*
   2  * Network Configuration Module
   3  *
   4  * Copyright (c) 2000 - 2012 Samsung Electronics Co., Ltd. All rights reserved.
   5  *
   6  * Licensed under the Apache License, Version 2.0 (the "License");
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *
  10  * http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  *
  18  */
  19
  20 #include <glib.h>
  21
  22 #include "netsupplicant.h"
  23 #include "log.h"
  24 #include "wifi-bssid-scan.h"
  25 #include "util.h"
  26 #include "wifi-power.h"
  27 #include "wifi-state.h"
  28 #include "wifi-background-scan.h"
  29
  30 #define NETCONFIG_SSID_LEN                                              32
  31 #define NETCONFIG_BSSID_LEN                                             6
  32
  33 #define VCONF_WIFI_ALWAYS_ALLOW_SCANNING \
  34         "file/private/wifi/always_allow_scanning"
  35
  36 static gboolean netconfig_is_bssid_scan_started = FALSE;
  37 static gboolean netconfig_is_device_scanning = FALSE;
  38 static gboolean netconfig_is_bssid_scan_aborted = FALSE;
  39 static int bssid_list_count = 0;
  40 static GSList *bssid_info_list = NULL;
  41
  42 struct bssid_scan_info_t {
  43         unsigned char ssid[NETCONFIG_SSID_LEN + 1];
  44         unsigned char bssid[NETCONFIG_BSSID_LEN + 1];
  45         int ssid_len;
  46         int rssi;
  47         int mode;
  48 };
  49
  50 gboolean netconfig_wifi_is_bssid_scan_started(void)
  51 {
  52         return netconfig_is_bssid_scan_started;
  53 }
  54
  55 static void __netconfig_wifi_bssid_notify_scan_done(void)
  56 {
  57         GVariantBuilder *builder = NULL;
  58         GVariantBuilder *builder1 = NULL;
  59         GSList* list = NULL;
  60         const char *prop_ssid = "ssid";
  61         const char *prop_bssid = "bssid";
  62         const char *prop_rssi = "rssi";
  63         const char *prop_mode = "mode";
  64
  65         builder = g_variant_builder_new(G_VARIANT_TYPE("a{sv}"));
  66         for (list = bssid_info_list; list != NULL; list = list->next) {
  67                 struct bssid_scan_info_t *bss_info = (struct bssid_scan_info_t *)list->data;
  68
  69                 if (bss_info) {
  70                         gchar bssid_buff[18] = { 0, };
  71                         gchar *bssid_str = bssid_buff;
  72                         unsigned char *ssid = (unsigned char *)bss_info->ssid;
  73                         int ssid_len = (int)bss_info->ssid_len;
  74                         int rssi = (int)bss_info->rssi;
  75                         int mode = (int)bss_info->mode;
  76                         int i = 0;
  77                         g_snprintf(bssid_buff, 18, "%02x:%02x:%02x:%02x:%02x:%02x",
  78                                         bss_info->bssid[0], bss_info->bssid[1], bss_info->bssid[2],
  79                                         bss_info->bssid[3], bss_info->bssid[4], bss_info->bssid[5]);
  80
  81                         DBG("BSS found; SSID %s, BSSID %s, RSSI %d MODE %d", ssid, bssid_str, rssi, mode);
  82
  83                         builder1 = g_variant_builder_new(G_VARIANT_TYPE("ay"));
  84                         for (i = 0; i < ssid_len; i++)
  85                                 g_variant_builder_add(builder1, "y", ssid[i]);
  86                         g_variant_builder_add(builder, "{sv}", prop_ssid, g_variant_builder_end(builder1));
  87                         g_variant_builder_unref(builder1);
  88
  89                         g_variant_builder_add(builder, "{sv}", prop_bssid, g_variant_new_string(bssid_str));
  90                         g_variant_builder_add(builder, "{sv}", prop_rssi, g_variant_new_int32(rssi));
  91                         g_variant_builder_add(builder, "{sv}", prop_mode, g_variant_new_int32(mode));
  92                 }
  93         }
  94
  95         wifi_emit_bssid_scan_completed((Wifi *)get_wifi_object(), g_variant_builder_end(builder));
  96         g_variant_builder_unref(builder);
  97
  98         if (bssid_info_list != NULL)
  99                 g_slist_free_full(bssid_info_list, g_free);
 100
 101         bssid_info_list = NULL;
 102         bssid_list_count = 0;
 103         INFO("BSSIDScanCompleted");
 104
 105         return;
 106 }
 107
 108 static void __netconfig_wifi_bssid_get_bss_info_result(
 109                 GObject *source_object, GAsyncResult *res, gpointer user_data)
 110 {
 111         GVariant *reply = NULL;
 112         GVariant *value;
 113         GVariantIter *iter;
 114         gchar *key;
 115         struct bssid_scan_info_t *bss_info;
 116         GDBusConnection *conn = NULL;
 117         GError *error = NULL;
 118
 119         conn = G_DBUS_CONNECTION(source_object);
 120         reply = g_dbus_connection_call_finish(conn, res, &error);
 121
 122         if (error != NULL) {
 123                 ERR("Error code: [%d] Error message: [%s]", error->code, error->message);
 124                 g_error_free(error);
 125                 goto done;
 126         }
 127
 128         bss_info = g_try_new0(struct bssid_scan_info_t, 1);
 129         if (bss_info == NULL)
 130                 goto done;
 131
 132         g_variant_get(reply, "(a{sv})", &iter);
 133         while (g_variant_iter_loop(iter, "{sv}", &key, &value)) {
 134                 if (key != NULL) {
 135                         if (g_strcmp0(key, "BSSID") == 0) {
 136                                 const guchar *bssid;
 137                                 gsize bssid_len;
 138
 139                                 bssid = g_variant_get_fixed_array(value, &bssid_len, sizeof(guchar));
 140                                 if (bssid_len == NETCONFIG_BSSID_LEN)
 141                                         memcpy(bss_info->bssid, bssid, bssid_len);
 142                         } else if (g_strcmp0(key, "SSID") == 0) {
 143                                 const guchar *ssid;
 144                                 gsize ssid_len;
 145
 146                                 ssid = g_variant_get_fixed_array(value, &ssid_len, sizeof(guchar));
 147                                 if (ssid != NULL && ssid_len > 0 && ssid_len <= NETCONFIG_SSID_LEN) {
 148                                         memcpy(bss_info->ssid, ssid, ssid_len);
 149                                         bss_info->ssid_len = ssid_len;
 150                                 } else {
 151                                         memset(bss_info->ssid, 0, sizeof(bss_info->ssid));
 152                                         bss_info->ssid_len = 0;
 153                                 }
 154                         } else if (g_strcmp0(key, "Mode") == 0) {
 155                                 gchar *mode = NULL;
 156
 157                                 g_variant_get(value, "s", &mode);
 158                                 if (mode == NULL)
 159                                         bss_info->mode = 0;
 160                                 else {
 161                                         if (g_strcmp0(mode, "infrastructure") == 0)
 162                                                 bss_info->mode = 1;
 163                                         else if (g_strcmp0(mode, "ad-hoc") == 0)
 164                                                 bss_info->mode = 2;
 165                                         else
 166                                                 bss_info->mode = 0;
 167                                         g_free(mode);
 168                                 }
 169                         } else if (g_strcmp0(key, "Signal") == 0) {
 170                                 gint16 signal;
 171
 172                                 signal = g_variant_get_int16(value);
 173                                 bss_info->rssi = signal;
 174                         }
 175                 }
 176         }
 177
 178         if (bss_info->ssid[0] == '\0')
 179                 g_free(bss_info);
 180         else
 181                 bssid_info_list = g_slist_append(bssid_info_list, bss_info);
 182
 183         g_variant_iter_free(iter);
 184 done:
 185         if (reply)
 186                 g_variant_unref(reply);
 187
 188         netconfig_gdbus_pending_call_unref();
 189
 190         bssid_list_count--;
 191         if (bssid_list_count <= 0) {
 192                 __netconfig_wifi_bssid_notify_scan_done();
 193
 194                 if (netconfig_is_bssid_scan_aborted == FALSE)
 195                         wifi_power_driver_and_supplicant(FALSE);
 196         }
 197 }
 198
 199 static void __netconfig_wifi_bssid_get_bss_info(const char *path, int index)
 200 {
 201         gboolean reply = FALSE;
 202         GVariant *param = NULL;
 203
 204         param = g_variant_new("(s)", SUPPLICANT_IFACE_BSS);
 205
 206         reply = netconfig_invoke_dbus_method_nonblock(SUPPLICANT_SERVICE,
 207                         path, DBUS_INTERFACE_PROPERTIES,
 208                         "GetAll", param, __netconfig_wifi_bssid_get_bss_info_result);
 209         if (reply != TRUE)
 210                 ERR("Fail to invoke_dbus_method_nonblock GetAll");
 211
 212         return;
 213 }
 214
 215 static void __netconfig_wifi_bssid_get_bss_result(GObject *source_object,
 216                 GAsyncResult *res, gpointer user_data)
 217 {
 218         GVariant *reply = NULL;
 219         GVariant *value = NULL;
 220         GVariantIter *iter = NULL;
 221         GDBusConnection *conn = NULL;
 222         gchar *path = NULL;
 223         gboolean counter_flag = FALSE;
 224         GError *error = NULL;
 225
 226         conn = G_DBUS_CONNECTION(source_object);
 227         reply = g_dbus_connection_call_finish(conn, res, &error);
 228         if (error != NULL) {
 229                 ERR("Error code: [%d] Error message: [%s]", error->code, error->message);
 230                 g_error_free(error);
 231                 goto done;
 232         }
 233
 234         g_variant_get(reply, "(v)", &value);
 235         if (g_variant_is_of_type(value, G_VARIANT_TYPE_OBJECT_PATH_ARRAY)) {
 236                 g_variant_get(value, "ao", &iter);
 237                 while (g_variant_iter_next(iter, "o", &path)) {
 238                         if (path != NULL && g_strcmp0(path, "/") != 0) {
 239                                 __netconfig_wifi_bssid_get_bss_info(path, ++bssid_list_count);
 240
 241                                 counter_flag = TRUE;
 242                         }
 243
 244                         if (path)
 245                                 g_free(path);
 246                 }
 247         }
 248
 249         if (iter)
 250                 g_variant_iter_free(iter);
 251
 252         if (value)
 253                 g_variant_unref(value);
 254
 255 done:
 256         if (reply)
 257                 g_variant_unref(reply);
 258
 259         netconfig_gdbus_pending_call_unref();
 260
 261         /* Send BssidScanCompleted signal even when the BSS count is 0 */
 262         if (bssid_list_count <= 0 && counter_flag == FALSE) {
 263                 __netconfig_wifi_bssid_notify_scan_done();
 264
 265                 if (netconfig_is_bssid_scan_aborted == FALSE)
 266                         wifi_power_driver_and_supplicant(FALSE);
 267         }
 268 }
 269
 270 static int _netconfig_wifi_bssid_get_bss(void)
 271 {
 272         gboolean reply = FALSE;
 273         const char *if_path = NULL;
 274         GVariant *params = NULL;
 275
 276         if_path = netconfig_wifi_get_supplicant_interface();
 277         if (if_path == NULL) {
 278                 DBG("Fail to get wpa_supplicant DBus path");
 279                 return -ESRCH;
 280         }
 281
 282         params = g_variant_new("(ss)", SUPPLICANT_IFACE_INTERFACE, "BSSs");
 283
 284         reply = netconfig_invoke_dbus_method_nonblock(SUPPLICANT_SERVICE,
 285                         if_path, DBUS_INTERFACE_PROPERTIES,
 286                         "Get", params, __netconfig_wifi_bssid_get_bss_result);
 287         if (reply != TRUE) {
 288                 ERR("Fail to method: Get");
 289
 290                 return -ESRCH;
 291         }
 292
 293         return 0;
 294 }
 295
 296
 297 static void __netconfig_set_bssid_scan_mode(gboolean enable)
 298 {
 299         if (netconfig_is_bssid_scan_started == enable)
 300                 return;
 301
 302         netconfig_is_bssid_scan_started = enable;
 303 }
 304
 305 void netconfig_wifi_bssid_signal_scandone(void)
 306 {
 307         bssid_list_count = 0;
 308         _netconfig_wifi_bssid_get_bss();
 309
 310         netconfig_is_device_scanning = FALSE;
 311
 312         __netconfig_set_bssid_scan_mode(FALSE);
 313 }
 314
 315 void netconfig_wifi_bssid_signal_scanaborted(void)
 316 {
 317         bssid_list_count = 0;
 318         netconfig_is_bssid_scan_aborted = TRUE;
 319         _netconfig_wifi_bssid_get_bss();
 320
 321         netconfig_is_device_scanning = FALSE;
 322
 323         __netconfig_set_bssid_scan_mode(FALSE);
 324 }
 325
 326 static int __netconfig_wifi_bssid_request_scan(const char *if_path)
 327 {
 328         GDBusConnection *connection = NULL;
 329         GVariant *message = NULL;
 330         GVariantBuilder *builder = NULL;
 331         const char *key1 = "Type";
 332         const char *val1 = "passive";
 333
 334         if (if_path == NULL)
 335                 if_path = netconfig_wifi_get_supplicant_interface();
 336
 337         if (if_path == NULL) {
 338                 DBG("Fail to get wpa_supplicant DBus path");
 339                 return -ESRCH;
 340         }
 341
 342         connection = netdbus_get_connection();
 343         if (connection == NULL) {
 344                 ERR("Failed to get GDBusconnection");
 345                 return -EIO;
 346         }
 347
 348         builder = g_variant_builder_new(G_VARIANT_TYPE("a{sv}"));
 349         g_variant_builder_add(builder, "{sv}", key1, g_variant_new_string(val1));
 350         message = g_variant_new("(@a{sv})", g_variant_builder_end(builder));
 351         g_variant_builder_unref(builder);
 352
 353         g_dbus_connection_call(connection,
 354                         SUPPLICANT_SERVICE,
 355                         if_path,
 356                         SUPPLICANT_INTERFACE ".Interface",
 357                         "Scan",
 358                         message,
 359                         NULL,
 360                         G_DBUS_CALL_FLAGS_NONE,
 361                         NETCONFIG_DBUS_REPLY_TIMEOUT,
 362                         netdbus_get_cancellable(),
 363                         NULL,
 364                         NULL);
 365
 366         netconfig_is_device_scanning = TRUE;
 367
 368         g_variant_unref(message);
 369         /* Clear bss_info_list for the next scan result */
 370         if (bssid_info_list) {
 371                 g_slist_free_full(bssid_info_list, g_free);
 372                 bssid_info_list = NULL;
 373         }
 374
 375         netconfig_is_bssid_scan_aborted = FALSE;
 376
 377         return 0;
 378 }
 379
 380 static void __netconfig_wifi_interface_create_result(
 381                 GObject *source_object, GAsyncResult *res, gpointer user_data)
 382 {
 383         GVariant *message;
 384         gchar *path = NULL;
 385         GDBusConnection *conn = NULL;
 386         GError *error = NULL;
 387
 388         conn = G_DBUS_CONNECTION(source_object);
 389
 390         message = g_dbus_connection_call_finish(conn, res, &error);
 391         if (error == NULL) {
 392                 g_variant_get(message, "(o)", &path);
 393
 394                 if (path) {
 395                         __netconfig_wifi_bssid_request_scan(path);
 396                         g_free(path);
 397                 }
 398         } else if (NULL != strstr(error->message, ".InterfaceExists")) {
 399                 INFO("Error Message %s %s", error->message, path);
 400                 g_variant_get(message, "(o)", &path);
 401                 if (path) {
 402                         __netconfig_wifi_bssid_request_scan(path);
 403                         g_free(path);
 404                 } else
 405                         __netconfig_wifi_bssid_request_scan(NULL);
 406         } else {
 407                 ERR("Failed to create interface, Error: %d[%s]", error->code, error->message);
 408                 __netconfig_set_bssid_scan_mode(FALSE);
 409                 wifi_power_driver_and_supplicant(FALSE);
 410         }
 411
 412         g_variant_unref(message);
 413 }
 414
 415 static int  __netconfig_wifi_bssid_create_interface(void)
 416 {
 417         GDBusConnection *connection = NULL;
 418         GVariant *message = NULL;
 419         GVariantBuilder *builder = NULL;
 420         const char *key = "Ifname";
 421         const char *val = WIFI_IFNAME;
 422
 423         connection = netdbus_get_connection();
 424         if (connection == NULL) {
 425                 DBG("Failed to get GDBusconnection");
 426                 return -EIO;
 427         }
 428
 429         builder = g_variant_builder_new(G_VARIANT_TYPE("a{sv}"));
 430         g_variant_builder_add(builder, "{sv}", key, g_variant_new_string(val));
 431         message = g_variant_new("(@a{sv})", g_variant_builder_end(builder));
 432
 433         g_dbus_connection_call(connection,
 434                         SUPPLICANT_SERVICE,
 435                         SUPPLICANT_PATH,
 436                         SUPPLICANT_INTERFACE,
 437                         "CreateInterface",
 438                         message,
 439                         NULL,
 440                         G_DBUS_CALL_FLAGS_NONE,
 441                         NETCONFIG_DBUS_REPLY_TIMEOUT,
 442                         netdbus_get_cancellable(),
 443                         (GAsyncReadyCallback) __netconfig_wifi_interface_create_result,
 444                         NULL);
 445
 446         g_variant_unref(message);
 447
 448         return 0;
 449 }
 450
 451 static int __netconfig_wifi_bssid_scan(void)
 452 {
 453         int err = 0;
 454         wifi_tech_state_e wifi_tech_state;
 455
 456         if (netconfig_is_device_scanning == TRUE)
 457                 return -EINPROGRESS;
 458
 459         wifi_tech_state = wifi_state_get_technology_state();
 460         if (wifi_tech_state <= NETCONFIG_WIFI_TECH_OFF)
 461                 err = wifi_power_driver_and_supplicant(TRUE);
 462
 463         if (err < 0 && err != -EALREADY)
 464                 return err;
 465
 466         netconfig_is_device_scanning = TRUE;
 467
 468         DBG("BSSID scan requested");
 469         if (wifi_tech_state >= NETCONFIG_WIFI_TECH_POWERED) {
 470                 if (netconfig_wifi_get_scanning() == TRUE)
 471                         return -EINPROGRESS;
 472
 473                 netconfig_wifi_bgscan_start(TRUE);
 474
 475                 if (wifi_tech_state == NETCONFIG_WIFI_TECH_CONNECTED)
 476                         __netconfig_wifi_bssid_request_scan(NULL);
 477         } else {
 478                 err = __netconfig_wifi_bssid_create_interface();
 479         }
 480
 481         return err;
 482 }
 483
 484 gboolean handle_request_bssid_scan(Wifi *wifi, GDBusMethodInvocation *context)
 485 {
 486         int err, enabled = 0;
 487         wifi_tech_state_e tech_state;
 488
 489         g_return_val_if_fail(wifi != NULL, FALSE);
 490
 491         if (netconfig_is_wifi_tethering_on() == TRUE) {
 492                 ERR("Wi-Fi Tethering is enabled");
 493                 netconfig_error_dbus_method_return(context, NETCONFIG_ERROR_NO_SERVICE, "TetheringEnabled");
 494                 return -EBUSY;
 495         }
 496
 497 #if !defined TIZEN_WEARABLE
 498         if (netconfig_wifi_is_bgscan_paused()) {
 499                 ERR("Scan is paused");
 500                 netconfig_error_dbus_method_return(context, NETCONFIG_ERROR_NO_SERVICE, "ScanPaused");
 501                 return FALSE;
 502         }
 503 #endif
 504
 505         tech_state = wifi_state_get_technology_state();
 506         if (tech_state <= NETCONFIG_WIFI_TECH_OFF) {
 507 #if !defined TIZEN_WEARABLE
 508                 enabled = 1;
 509 #else
 510                 enabled = 0;
 511 #endif
 512
 513                 if (enabled == 0) {
 514                         netconfig_error_permission_denied(context);
 515                         return FALSE;
 516                 }
 517         }
 518
 519         __netconfig_set_bssid_scan_mode(TRUE);
 520
 521         err = __netconfig_wifi_bssid_scan();
 522         if (err < 0) {
 523                 if (err == -EINPROGRESS)
 524                         netconfig_error_inprogress(context);
 525                 else
 526                         netconfig_error_wifi_driver_failed(context);
 527
 528                 return FALSE;
 529         }
 530
 531         wifi_complete_request_bssid_scan(wifi, context);
 532         return TRUE;
 533 }