wpa_supplicant/dbus/dbus_old.c

   1 /*
   2  * WPA Supplicant / dbus-based control interface
   3  * Copyright (c) 2006, Dan Williams <dcbw@redhat.com> and Red Hat, Inc.
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10 #include <dbus/dbus.h>
  11
  12 #include "common.h"
  13 #include "eloop.h"
  14 #include "wps/wps.h"
  15 #include "../config.h"
  16 #include "../wpa_supplicant_i.h"
  17 #include "../bss.h"
  18 #include "dbus_old.h"
  19 #include "dbus_old_handlers.h"
  20 #include "dbus_common_i.h"
  21
  22
  23 /**
  24  * wpas_dbus_decompose_object_path - Decompose an interface object path into parts
  25  * @path: The dbus object path
  26  * @network: (out) the configured network this object path refers to, if any
  27  * @bssid: (out) the scanned bssid this object path refers to, if any
  28  * Returns: The object path of the network interface this path refers to
  29  *
  30  * For a given object path, decomposes the object path into object id, network,
  31  * and BSSID parts, if those parts exist.
  32  */
  33 char * wpas_dbus_decompose_object_path(const char *path, char **network,
  34                                        char **bssid)
  35 {
  36         const unsigned int dev_path_prefix_len =
  37                 strlen(WPAS_DBUS_PATH_INTERFACES "/");
  38         char *obj_path_only;
  39         char *next_sep;
  40
  41         /* Be a bit paranoid about path */
  42         if (!path || strncmp(path, WPAS_DBUS_PATH_INTERFACES "/",
  43                              dev_path_prefix_len))
  44                 return NULL;
  45
  46         /* Ensure there's something at the end of the path */
  47         if ((path + dev_path_prefix_len)[0] == '\0')
  48                 return NULL;
  49
  50         obj_path_only = os_strdup(path);
  51         if (obj_path_only == NULL)
  52                 return NULL;
  53
  54         next_sep = strchr(obj_path_only + dev_path_prefix_len, '/');
  55         if (next_sep != NULL) {
  56                 const char *net_part = strstr(next_sep,
  57                                               WPAS_DBUS_NETWORKS_PART "/");
  58                 const char *bssid_part = strstr(next_sep,
  59                                                 WPAS_DBUS_BSSIDS_PART "/");
  60
  61                 if (network && net_part) {
  62                         /* Deal with a request for a configured network */
  63                         const char *net_name = net_part +
  64                                 strlen(WPAS_DBUS_NETWORKS_PART "/");
  65                         *network = NULL;
  66                         if (strlen(net_name))
  67                                 *network = os_strdup(net_name);
  68                 } else if (bssid && bssid_part) {
  69                         /* Deal with a request for a scanned BSSID */
  70                         const char *bssid_name = bssid_part +
  71                                 strlen(WPAS_DBUS_BSSIDS_PART "/");
  72                         if (strlen(bssid_name))
  73                                 *bssid = os_strdup(bssid_name);
  74                         else
  75                                 *bssid = NULL;
  76                 }
  77
  78                 /* Cut off interface object path before "/" */
  79                 *next_sep = '\0';
  80         }
  81
  82         return obj_path_only;
  83 }
  84
  85
  86 /**
  87  * wpas_dbus_new_invalid_iface_error - Return a new invalid interface error message
  88  * @message: Pointer to incoming dbus message this error refers to
  89  * Returns: A dbus error message
  90  *
  91  * Convenience function to create and return an invalid interface error
  92  */
  93 DBusMessage * wpas_dbus_new_invalid_iface_error(DBusMessage *message)
  94 {
  95         return dbus_message_new_error(message, WPAS_ERROR_INVALID_IFACE,
  96                                       "wpa_supplicant knows nothing about "
  97                                       "this interface.");
  98 }
  99
 100
 101 /**
 102  * wpas_dbus_new_invalid_network_error - Return a new invalid network error message
 103  * @message: Pointer to incoming dbus message this error refers to
 104  * Returns: a dbus error message
 105  *
 106  * Convenience function to create and return an invalid network error
 107  */
 108 DBusMessage * wpas_dbus_new_invalid_network_error(DBusMessage *message)
 109 {
 110         return dbus_message_new_error(message, WPAS_ERROR_INVALID_NETWORK,
 111                                       "The requested network does not exist.");
 112 }
 113
 114
 115 /**
 116  * wpas_dbus_new_invalid_bssid_error - Return a new invalid bssid error message
 117  * @message: Pointer to incoming dbus message this error refers to
 118  * Returns: a dbus error message
 119  *
 120  * Convenience function to create and return an invalid bssid error
 121  */
 122 static DBusMessage * wpas_dbus_new_invalid_bssid_error(DBusMessage *message)
 123 {
 124         return dbus_message_new_error(message, WPAS_ERROR_INVALID_BSSID,
 125                                       "The BSSID requested was invalid.");
 126 }
 127
 128
 129 /**
 130  * wpas_dispatch_network_method - dispatch messages for configured networks
 131  * @message: the incoming dbus message
 132  * @wpa_s: a network interface's data
 133  * @network_id: id of the configured network we're interested in
 134  * Returns: a reply dbus message, or a dbus error message
 135  *
 136  * This function dispatches all incoming dbus messages for configured networks.
 137  */
 138 static DBusMessage * wpas_dispatch_network_method(DBusMessage *message,
 139                                                   struct wpa_supplicant *wpa_s,
 140                                                   int network_id)
 141 {
 142         DBusMessage *reply = NULL;
 143         const char *method = dbus_message_get_member(message);
 144         struct wpa_ssid *ssid;
 145
 146         ssid = wpa_config_get_network(wpa_s->conf, network_id);
 147         if (ssid == NULL)
 148                 return wpas_dbus_new_invalid_network_error(message);
 149
 150         if (!strcmp(method, "set"))
 151                 reply = wpas_dbus_iface_set_network(message, wpa_s, ssid);
 152         else if (!strcmp(method, "enable"))
 153                 reply = wpas_dbus_iface_enable_network(message, wpa_s, ssid);
 154         else if (!strcmp(method, "disable"))
 155                 reply = wpas_dbus_iface_disable_network(message, wpa_s, ssid);
 156
 157         return reply;
 158 }
 159
 160
 161 /**
 162  * wpas_dispatch_bssid_method - dispatch messages for scanned networks
 163  * @message: the incoming dbus message
 164  * @wpa_s: a network interface's data
 165  * @bssid: bssid of the scanned network we're interested in
 166  * Returns: a reply dbus message, or a dbus error message
 167  *
 168  * This function dispatches all incoming dbus messages for scanned networks.
 169  */
 170 static DBusMessage * wpas_dispatch_bssid_method(DBusMessage *message,
 171                                                 struct wpa_supplicant *wpa_s,
 172                                                 const char *bssid_txt)
 173 {
 174         u8 bssid[ETH_ALEN];
 175         struct wpa_bss *bss;
 176
 177         if (hexstr2bin(bssid_txt, bssid, ETH_ALEN) < 0)
 178                 return wpas_dbus_new_invalid_bssid_error(message);
 179
 180         bss = wpa_bss_get_bssid(wpa_s, bssid);
 181         if (bss == NULL)
 182                 return wpas_dbus_new_invalid_bssid_error(message);
 183
 184         /* Dispatch the method call against the scanned bssid */
 185         if (os_strcmp(dbus_message_get_member(message), "properties") == 0)
 186                 return wpas_dbus_bssid_properties(message, wpa_s, bss);
 187
 188         return NULL;
 189 }
 190
 191
 192 /**
 193  * wpas_iface_message_handler - Dispatch messages for interfaces or networks
 194  * @connection: Connection to the system message bus
 195  * @message: An incoming dbus message
 196  * @user_data: A pointer to a dbus control interface data structure
 197  * Returns: Whether or not the message was handled
 198  *
 199  * This function dispatches all incoming dbus messages for network interfaces,
 200  * or objects owned by them, such as scanned BSSIDs and configured networks.
 201  */
 202 static DBusHandlerResult wpas_iface_message_handler(DBusConnection *connection,
 203                                                     DBusMessage *message,
 204                                                     void *user_data)
 205 {
 206         struct wpa_supplicant *wpa_s = user_data;
 207         const char *method = dbus_message_get_member(message);
 208         const char *path = dbus_message_get_path(message);
 209         const char *msg_interface = dbus_message_get_interface(message);
 210         char *iface_obj_path = NULL;
 211         char *network = NULL;
 212         char *bssid = NULL;
 213         DBusMessage *reply = NULL;
 214
 215         /* Caller must specify a message interface */
 216         if (!msg_interface)
 217                 goto out;
 218
 219         iface_obj_path = wpas_dbus_decompose_object_path(path, &network,
 220                                                          &bssid);
 221         if (iface_obj_path == NULL) {
 222                 reply = wpas_dbus_new_invalid_iface_error(message);
 223                 goto out;
 224         }
 225
 226         /* Make sure the message's object path actually refers to the
 227          * wpa_supplicant structure it's supposed to (which is wpa_s)
 228          */
 229         if (wpa_supplicant_get_iface_by_dbus_path(wpa_s->global,
 230                                                   iface_obj_path) != wpa_s) {
 231                 reply = wpas_dbus_new_invalid_iface_error(message);
 232                 goto out;
 233         }
 234
 235         if (network && !strcmp(msg_interface, WPAS_DBUS_IFACE_NETWORK)) {
 236                 /* A method for one of this interface's configured networks */
 237                 int nid = strtoul(network, NULL, 10);
 238                 if (errno != EINVAL)
 239                         reply = wpas_dispatch_network_method(message, wpa_s,
 240                                                              nid);
 241                 else
 242                         reply = wpas_dbus_new_invalid_network_error(message);
 243         } else if (bssid && !strcmp(msg_interface, WPAS_DBUS_IFACE_BSSID)) {
 244                 /* A method for one of this interface's scanned BSSIDs */
 245                 reply = wpas_dispatch_bssid_method(message, wpa_s, bssid);
 246         } else if (!strcmp(msg_interface, WPAS_DBUS_IFACE_INTERFACE)) {
 247                 /* A method for an interface only. */
 248                 if (!strcmp(method, "scan"))
 249                         reply = wpas_dbus_iface_scan(message, wpa_s);
 250                 else if (!strcmp(method, "scanResults"))
 251                         reply = wpas_dbus_iface_scan_results(message, wpa_s);
 252                 else if (!strcmp(method, "addNetwork"))
 253                         reply = wpas_dbus_iface_add_network(message, wpa_s);
 254                 else if (!strcmp(method, "removeNetwork"))
 255                         reply = wpas_dbus_iface_remove_network(message, wpa_s);
 256                 else if (!strcmp(method, "selectNetwork"))
 257                         reply = wpas_dbus_iface_select_network(message, wpa_s);
 258                 else if (!strcmp(method, "capabilities"))
 259                         reply = wpas_dbus_iface_capabilities(message, wpa_s);
 260                 else if (!strcmp(method, "disconnect"))
 261                         reply = wpas_dbus_iface_disconnect(message, wpa_s);
 262                 else if (!strcmp(method, "setAPScan"))
 263                         reply = wpas_dbus_iface_set_ap_scan(message, wpa_s);
 264                 else if (!strcmp(method, "setSmartcardModules"))
 265                         reply = wpas_dbus_iface_set_smartcard_modules(message,
 266                                                                       wpa_s);
 267                 else if (!strcmp(method, "state"))
 268                         reply = wpas_dbus_iface_get_state(message, wpa_s);
 269                 else if (!strcmp(method, "scanning"))
 270                         reply = wpas_dbus_iface_get_scanning(message, wpa_s);
 271 #ifndef CONFIG_NO_CONFIG_BLOBS
 272                 else if (!strcmp(method, "setBlobs"))
 273                         reply = wpas_dbus_iface_set_blobs(message, wpa_s);
 274                 else if (!strcmp(method, "removeBlobs"))
 275                         reply = wpas_dbus_iface_remove_blobs(message, wpa_s);
 276 #endif /* CONFIG_NO_CONFIG_BLOBS */
 277 #ifdef CONFIG_WPS
 278                 else if (!os_strcmp(method, "wpsPbc"))
 279                         reply = wpas_dbus_iface_wps_pbc(message, wpa_s);
 280                 else if (!os_strcmp(method, "wpsPin"))
 281                         reply = wpas_dbus_iface_wps_pin(message, wpa_s);
 282                 else if (!os_strcmp(method, "wpsReg"))
 283                         reply = wpas_dbus_iface_wps_reg(message, wpa_s);
 284 #endif /* CONFIG_WPS */
 285                 else if (!os_strcmp(method, "flush"))
 286                         reply = wpas_dbus_iface_flush(message, wpa_s);
 287         }
 288
 289         /* If the message was handled, send back the reply */
 290         if (reply) {
 291                 if (!dbus_message_get_no_reply(message))
 292                         dbus_connection_send(connection, reply, NULL);
 293                 dbus_message_unref(reply);
 294         }
 295
 296 out:
 297         os_free(iface_obj_path);
 298         os_free(network);
 299         os_free(bssid);
 300         return reply ? DBUS_HANDLER_RESULT_HANDLED :
 301                 DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 302 }
 303
 304
 305 /**
 306  * wpas_message_handler - dispatch incoming dbus messages
 307  * @connection: connection to the system message bus
 308  * @message: an incoming dbus message
 309  * @user_data: a pointer to a dbus control interface data structure
 310  * Returns: whether or not the message was handled
 311  *
 312  * This function dispatches all incoming dbus messages to the correct
 313  * handlers, depending on what the message's target object path is,
 314  * and what the method call is.
 315  */
 316 static DBusHandlerResult wpas_message_handler(DBusConnection *connection,
 317         DBusMessage *message, void *user_data)
 318 {
 319         struct wpas_dbus_priv *ctrl_iface = user_data;
 320         const char *method;
 321         const char *path;
 322         const char *msg_interface;
 323         DBusMessage *reply = NULL;
 324
 325         method = dbus_message_get_member(message);
 326         path = dbus_message_get_path(message);
 327         msg_interface = dbus_message_get_interface(message);
 328         if (!method || !path || !ctrl_iface || !msg_interface)
 329                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 330
 331         /* Validate the method interface */
 332         if (strcmp(msg_interface, WPAS_DBUS_INTERFACE) != 0)
 333                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 334
 335         if (!strcmp(path, WPAS_DBUS_PATH)) {
 336                 /* dispatch methods against our global dbus interface here */
 337                 if (!strcmp(method, "addInterface")) {
 338                         reply = wpas_dbus_global_add_interface(
 339                                 message, ctrl_iface->global);
 340                 } else if (!strcmp(method, "removeInterface")) {
 341                         reply = wpas_dbus_global_remove_interface(
 342                                 message, ctrl_iface->global);
 343                 } else if (!strcmp(method, "getInterface")) {
 344                         reply = wpas_dbus_global_get_interface(
 345                                 message, ctrl_iface->global);
 346                 } else if (!strcmp(method, "setDebugParams")) {
 347                         reply = wpas_dbus_global_set_debugparams(
 348                                 message, ctrl_iface->global);
 349                 }
 350         }
 351
 352         /* If the message was handled, send back the reply */
 353         if (reply) {
 354                 if (!dbus_message_get_no_reply(message))
 355                         dbus_connection_send(connection, reply, NULL);
 356                 dbus_message_unref(reply);
 357         }
 358
 359         return reply ? DBUS_HANDLER_RESULT_HANDLED :
 360                 DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 361 }
 362
 363
 364 /**
 365  * wpa_supplicant_dbus_notify_scan_results - Send a scan results signal
 366  * @wpa_s: %wpa_supplicant network interface data
 367  * Returns: 0 on success, -1 on failure
 368  *
 369  * Notify listeners that this interface has updated scan results.
 370  */
 371 void wpa_supplicant_dbus_notify_scan_results(struct wpa_supplicant *wpa_s)
 372 {
 373         struct wpas_dbus_priv *iface = wpa_s->global->dbus;
 374         DBusMessage *_signal;
 375
 376         /* Do nothing if the control interface is not turned on */
 377         if (iface == NULL)
 378                 return;
 379
 380         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 381                                           WPAS_DBUS_IFACE_INTERFACE,
 382                                           "ScanResultsAvailable");
 383         if (_signal == NULL) {
 384                 wpa_printf(MSG_ERROR, "dbus: Not enough memory to send scan "
 385                            "results signal");
 386                 return;
 387         }
 388         dbus_connection_send(iface->con, _signal, NULL);
 389         dbus_message_unref(_signal);
 390 }
 391
 392
 393 /**
 394  * wpa_supplicant_dbus_notify_state_change - Send a state change signal
 395  * @wpa_s: %wpa_supplicant network interface data
 396  * @new_state: new state wpa_supplicant is entering
 397  * @old_state: old state wpa_supplicant is leaving
 398  * Returns: 0 on success, -1 on failure
 399  *
 400  * Notify listeners that wpa_supplicant has changed state
 401  */
 402 void wpa_supplicant_dbus_notify_state_change(struct wpa_supplicant *wpa_s,
 403                                              enum wpa_states new_state,
 404                                              enum wpa_states old_state)
 405 {
 406         struct wpas_dbus_priv *iface;
 407         DBusMessage *_signal = NULL;
 408         const char *new_state_str, *old_state_str;
 409
 410         if (wpa_s->dbus_path == NULL)
 411                 return; /* Skip signal since D-Bus setup is not yet ready */
 412
 413         /* Do nothing if the control interface is not turned on */
 414         if (wpa_s->global == NULL)
 415                 return;
 416         iface = wpa_s->global->dbus;
 417         if (iface == NULL)
 418                 return;
 419
 420         /* Only send signal if state really changed */
 421         if (new_state == old_state)
 422                 return;
 423
 424         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 425                                           WPAS_DBUS_IFACE_INTERFACE,
 426                                           "StateChange");
 427         if (_signal == NULL) {
 428                 wpa_printf(MSG_ERROR,
 429                            "dbus: wpa_supplicant_dbus_notify_state_change: "
 430                            "could not create dbus signal; likely out of "
 431                            "memory");
 432                 return;
 433         }
 434
 435         new_state_str = wpa_supplicant_state_txt(new_state);
 436         old_state_str = wpa_supplicant_state_txt(old_state);
 437
 438         if (!dbus_message_append_args(_signal,
 439                                       DBUS_TYPE_STRING, &new_state_str,
 440                                       DBUS_TYPE_STRING, &old_state_str,
 441                                       DBUS_TYPE_INVALID)) {
 442                 wpa_printf(MSG_ERROR,
 443                            "dbus: wpa_supplicant_dbus_notify_state_change: "
 444                            "Not enough memory to construct state change "
 445                            "signal");
 446                 goto out;
 447         }
 448
 449         dbus_connection_send(iface->con, _signal, NULL);
 450
 451 out:
 452         dbus_message_unref(_signal);
 453 }
 454
 455
 456 /**
 457  * wpa_supplicant_dbus_notify_scanning - send scanning status
 458  * @wpa_s: %wpa_supplicant network interface data
 459  * Returns: 0 on success, -1 on failure
 460  *
 461  * Notify listeners of interface scanning state changes
 462  */
 463 void wpa_supplicant_dbus_notify_scanning(struct wpa_supplicant *wpa_s)
 464 {
 465         struct wpas_dbus_priv *iface = wpa_s->global->dbus;
 466         DBusMessage *_signal;
 467         dbus_bool_t scanning = wpa_s->scanning ? TRUE : FALSE;
 468
 469         /* Do nothing if the control interface is not turned on */
 470         if (iface == NULL)
 471                 return;
 472
 473         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 474                                           WPAS_DBUS_IFACE_INTERFACE,
 475                                           "Scanning");
 476         if (_signal == NULL) {
 477                 wpa_printf(MSG_ERROR, "dbus: Not enough memory to send scan "
 478                            "results signal");
 479                 return;
 480         }
 481
 482         if (dbus_message_append_args(_signal,
 483                                      DBUS_TYPE_BOOLEAN, &scanning,
 484                                      DBUS_TYPE_INVALID)) {
 485                 dbus_connection_send(iface->con, _signal, NULL);
 486         } else {
 487                 wpa_printf(MSG_ERROR, "dbus: Not enough memory to construct "
 488                            "signal");
 489         }
 490         dbus_message_unref(_signal);
 491 }
 492
 493
 494 #ifdef CONFIG_WPS
 495 void wpa_supplicant_dbus_notify_wps_cred(struct wpa_supplicant *wpa_s,
 496                                          const struct wps_credential *cred)
 497 {
 498         struct wpas_dbus_priv *iface;
 499         DBusMessage *_signal = NULL;
 500
 501         /* Do nothing if the control interface is not turned on */
 502         if (wpa_s->global == NULL)
 503                 return;
 504         iface = wpa_s->global->dbus;
 505         if (iface == NULL)
 506                 return;
 507
 508         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 509                                           WPAS_DBUS_IFACE_INTERFACE,
 510                                           "WpsCred");
 511         if (_signal == NULL) {
 512                 wpa_printf(MSG_ERROR,
 513                            "dbus: wpa_supplicant_dbus_notify_wps_cred: "
 514                            "Could not create dbus signal; likely out of "
 515                            "memory");
 516                 return;
 517         }
 518
 519         if (!dbus_message_append_args(_signal,
 520                                       DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
 521                                       &cred->cred_attr, cred->cred_attr_len,
 522                                       DBUS_TYPE_INVALID)) {
 523                 wpa_printf(MSG_ERROR,
 524                            "dbus: wpa_supplicant_dbus_notify_wps_cred: "
 525                            "Not enough memory to construct signal");
 526                 goto out;
 527         }
 528
 529         dbus_connection_send(iface->con, _signal, NULL);
 530
 531 out:
 532         dbus_message_unref(_signal);
 533 }
 534 #else /* CONFIG_WPS */
 535 void wpa_supplicant_dbus_notify_wps_cred(struct wpa_supplicant *wpa_s,
 536                                          const struct wps_credential *cred)
 537 {
 538 }
 539 #endif /* CONFIG_WPS */
 540
 541 void wpa_supplicant_dbus_notify_certification(struct wpa_supplicant *wpa_s,
 542                                               int depth, const char *subject,
 543                                               const char *cert_hash,
 544                                               const struct wpabuf *cert)
 545 {
 546         struct wpas_dbus_priv *iface;
 547         DBusMessage *_signal = NULL;
 548         const char *hash;
 549         const char *cert_hex;
 550         int cert_hex_len;
 551
 552         /* Do nothing if the control interface is not turned on */
 553         if (wpa_s->global == NULL)
 554                 return;
 555         iface = wpa_s->global->dbus;
 556         if (iface == NULL)
 557                 return;
 558
 559         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 560                                           WPAS_DBUS_IFACE_INTERFACE,
 561                                           "Certification");
 562         if (_signal == NULL) {
 563                 wpa_printf(MSG_ERROR,
 564                            "dbus: wpa_supplicant_dbus_notify_certification: "
 565                            "Could not create dbus signal; likely out of "
 566                            "memory");
 567                 return;
 568         }
 569
 570         hash = cert_hash ? cert_hash : "";
 571         cert_hex = cert ? wpabuf_head(cert) : "";
 572         cert_hex_len = cert ? wpabuf_len(cert) : 0;
 573
 574         if (!dbus_message_append_args(_signal,
 575                                       DBUS_TYPE_INT32,&depth,
 576                                       DBUS_TYPE_STRING, &subject,
 577                                       DBUS_TYPE_STRING, &hash,
 578                                       DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
 579                                       &cert_hex, cert_hex_len,
 580                                       DBUS_TYPE_INVALID)) {
 581                 wpa_printf(MSG_ERROR,
 582                            "dbus: wpa_supplicant_dbus_notify_certification: "
 583                            "Not enough memory to construct signal");
 584                 goto out;
 585         }
 586
 587         dbus_connection_send(iface->con, _signal, NULL);
 588
 589 out:
 590         dbus_message_unref(_signal);
 591
 592 }
 593
 594
 595 /**
 596  * wpa_supplicant_dbus_ctrl_iface_init - Initialize dbus control interface
 597  * @global: Pointer to global data from wpa_supplicant_init()
 598  * Returns: 0 on success, -1 on failure
 599  *
 600  * Initialize the dbus control interface and start receiving commands from
 601  * external programs over the bus.
 602  */
 603 int wpa_supplicant_dbus_ctrl_iface_init(struct wpas_dbus_priv *iface)
 604 {
 605         DBusError error;
 606         int ret = -1;
 607         DBusObjectPathVTable wpas_vtable = {
 608                 NULL, &wpas_message_handler, NULL, NULL, NULL, NULL
 609         };
 610
 611         /* Register the message handler for the global dbus interface */
 612         if (!dbus_connection_register_object_path(iface->con,
 613                                                   WPAS_DBUS_PATH, &wpas_vtable,
 614                                                   iface)) {
 615                 wpa_printf(MSG_ERROR, "dbus: Could not set up message "
 616                            "handler");
 617                 return -1;
 618         }
 619
 620         /* Register our service with the message bus */
 621         dbus_error_init(&error);
 622         switch (dbus_bus_request_name(iface->con, WPAS_DBUS_SERVICE,
 623                                       0, &error)) {
 624         case DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER:
 625                 ret = 0;
 626                 break;
 627         case DBUS_REQUEST_NAME_REPLY_EXISTS:
 628         case DBUS_REQUEST_NAME_REPLY_IN_QUEUE:
 629         case DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER:
 630                 wpa_printf(MSG_ERROR, "dbus: Could not request service name: "
 631                            "already registered");
 632                 break;
 633         default:
 634                 wpa_printf(MSG_ERROR, "dbus: Could not request service name: "
 635                            "%s %s", error.name, error.message);
 636                 break;
 637         }
 638         dbus_error_free(&error);
 639
 640         if (ret != 0)
 641                 return -1;
 642
 643         wpa_printf(MSG_DEBUG, "Providing DBus service '" WPAS_DBUS_SERVICE
 644                    "'.");
 645
 646         return 0;
 647 }
 648
 649
 650 /**
 651  * wpas_dbus_register_new_iface - Register a new interface with dbus
 652  * @wpa_s: %wpa_supplicant interface description structure to register
 653  * Returns: 0 on success, -1 on error
 654  *
 655  * Registers a new interface with dbus and assigns it a dbus object path.
 656  */
 657 int wpas_dbus_register_iface(struct wpa_supplicant *wpa_s)
 658 {
 659         struct wpas_dbus_priv *ctrl_iface = wpa_s->global->dbus;
 660         DBusConnection * con;
 661         u32 next;
 662         DBusObjectPathVTable vtable = {
 663                 NULL, &wpas_iface_message_handler, NULL, NULL, NULL, NULL
 664         };
 665
 666         /* Do nothing if the control interface is not turned on */
 667         if (ctrl_iface == NULL)
 668                 return 0;
 669
 670         con = ctrl_iface->con;
 671         next = ctrl_iface->next_objid++;
 672
 673         /* Create and set the interface's object path */
 674         wpa_s->dbus_path = os_zalloc(WPAS_DBUS_OBJECT_PATH_MAX);
 675         if (wpa_s->dbus_path == NULL)
 676                 return -1;
 677         os_snprintf(wpa_s->dbus_path, WPAS_DBUS_OBJECT_PATH_MAX,
 678                     WPAS_DBUS_PATH_INTERFACES "/%u",
 679                     next);
 680
 681         /* Register the message handler for the interface functions */
 682         if (!dbus_connection_register_fallback(con, wpa_s->dbus_path, &vtable,
 683                                                wpa_s)) {
 684                 wpa_printf(MSG_ERROR, "dbus: Could not set up message "
 685                            "handler for interface %s", wpa_s->ifname);
 686                 return -1;
 687         }
 688
 689         return 0;
 690 }
 691
 692
 693 /**
 694  * wpas_dbus_unregister_iface - Unregister an interface from dbus
 695  * @wpa_s: wpa_supplicant interface structure
 696  * Returns: 0 on success, -1 on failure
 697  *
 698  * Unregisters the interface with dbus
 699  */
 700 int wpas_dbus_unregister_iface(struct wpa_supplicant *wpa_s)
 701 {
 702         struct wpas_dbus_priv *ctrl_iface;
 703         DBusConnection *con;
 704
 705         /* Do nothing if the control interface is not turned on */
 706         if (wpa_s == NULL || wpa_s->global == NULL)
 707                 return 0;
 708         ctrl_iface = wpa_s->global->dbus;
 709         if (ctrl_iface == NULL)
 710                 return 0;
 711
 712         con = ctrl_iface->con;
 713         if (!dbus_connection_unregister_object_path(con, wpa_s->dbus_path))
 714                 return -1;
 715
 716         os_free(wpa_s->dbus_path);
 717         wpa_s->dbus_path = NULL;
 718
 719         return 0;
 720 }
 721
 722
 723 /**
 724  * wpa_supplicant_get_iface_by_dbus_path - Get a new network interface
 725  * @global: Pointer to global data from wpa_supplicant_init()
 726  * @path: Pointer to a dbus object path representing an interface
 727  * Returns: Pointer to the interface or %NULL if not found
 728  */
 729 struct wpa_supplicant * wpa_supplicant_get_iface_by_dbus_path(
 730         struct wpa_global *global, const char *path)
 731 {
 732         struct wpa_supplicant *wpa_s;
 733
 734         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
 735                 if (strcmp(wpa_s->dbus_path, path) == 0)
 736                         return wpa_s;
 737         }
 738         return NULL;
 739 }