libeap/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(
  96                 message, WPAS_ERROR_INVALID_IFACE,
  97                 "wpa_supplicant knows nothing about 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         wpa_printf(MSG_MSGDUMP, "dbus[old/iface]: %s.%s (%s) [%s]",
 220                    msg_interface, method, path,
 221                    dbus_message_get_signature(message));
 222
 223         iface_obj_path = wpas_dbus_decompose_object_path(path, &network,
 224                                                          &bssid);
 225         if (iface_obj_path == NULL) {
 226                 reply = wpas_dbus_new_invalid_iface_error(message);
 227                 goto out;
 228         }
 229
 230         /* Make sure the message's object path actually refers to the
 231          * wpa_supplicant structure it's supposed to (which is wpa_s)
 232          */
 233         if (wpa_supplicant_get_iface_by_dbus_path(wpa_s->global,
 234                                                   iface_obj_path) != wpa_s) {
 235                 reply = wpas_dbus_new_invalid_iface_error(message);
 236                 goto out;
 237         }
 238
 239         if (network && !strcmp(msg_interface, WPAS_DBUS_IFACE_NETWORK)) {
 240                 /* A method for one of this interface's configured networks */
 241                 int nid = strtoul(network, NULL, 10);
 242
 243                 if (errno != EINVAL)
 244                         reply = wpas_dispatch_network_method(message, wpa_s,
 245                                                              nid);
 246                 else
 247                         reply = wpas_dbus_new_invalid_network_error(message);
 248         } else if (bssid && !strcmp(msg_interface, WPAS_DBUS_IFACE_BSSID)) {
 249                 /* A method for one of this interface's scanned BSSIDs */
 250                 reply = wpas_dispatch_bssid_method(message, wpa_s, bssid);
 251         } else if (!strcmp(msg_interface, WPAS_DBUS_IFACE_INTERFACE)) {
 252                 /* A method for an interface only. */
 253                 if (!strcmp(method, "scan"))
 254                         reply = wpas_dbus_iface_scan(message, wpa_s);
 255                 else if (!strcmp(method, "scanResults"))
 256                         reply = wpas_dbus_iface_scan_results(message, wpa_s);
 257                 else if (!strcmp(method, "addNetwork"))
 258                         reply = wpas_dbus_iface_add_network(message, wpa_s);
 259                 else if (!strcmp(method, "removeNetwork"))
 260                         reply = wpas_dbus_iface_remove_network(message, wpa_s);
 261                 else if (!strcmp(method, "selectNetwork"))
 262                         reply = wpas_dbus_iface_select_network(message, wpa_s);
 263                 else if (!strcmp(method, "capabilities"))
 264                         reply = wpas_dbus_iface_capabilities(message, wpa_s);
 265                 else if (!strcmp(method, "disconnect"))
 266                         reply = wpas_dbus_iface_disconnect(message, wpa_s);
 267                 else if (!strcmp(method, "setAPScan"))
 268                         reply = wpas_dbus_iface_set_ap_scan(message, wpa_s);
 269                 else if (!strcmp(method, "setSmartcardModules"))
 270                         reply = wpas_dbus_iface_set_smartcard_modules(message,
 271                                                                       wpa_s);
 272                 else if (!strcmp(method, "state"))
 273                         reply = wpas_dbus_iface_get_state(message, wpa_s);
 274                 else if (!strcmp(method, "scanning"))
 275                         reply = wpas_dbus_iface_get_scanning(message, wpa_s);
 276 #ifndef CONFIG_NO_CONFIG_BLOBS
 277                 else if (!strcmp(method, "setBlobs"))
 278                         reply = wpas_dbus_iface_set_blobs(message, wpa_s);
 279                 else if (!strcmp(method, "removeBlobs"))
 280                         reply = wpas_dbus_iface_remove_blobs(message, wpa_s);
 281 #endif /* CONFIG_NO_CONFIG_BLOBS */
 282 #ifdef CONFIG_WPS
 283                 else if (os_strcmp(method, "wpsPbc") == 0)
 284                         reply = wpas_dbus_iface_wps_pbc(message, wpa_s);
 285                 else if (os_strcmp(method, "wpsPin") == 0)
 286                         reply = wpas_dbus_iface_wps_pin(message, wpa_s);
 287                 else if (os_strcmp(method, "wpsReg") == 0)
 288                         reply = wpas_dbus_iface_wps_reg(message, wpa_s);
 289 #endif /* CONFIG_WPS */
 290                 else if (os_strcmp(method, "flush") == 0)
 291                         reply = wpas_dbus_iface_flush(message, wpa_s);
 292         }
 293
 294         /* If the message was handled, send back the reply */
 295 out:
 296         if (reply) {
 297                 if (!dbus_message_get_no_reply(message))
 298                         dbus_connection_send(connection, reply, NULL);
 299                 dbus_message_unref(reply);
 300         }
 301
 302         os_free(iface_obj_path);
 303         os_free(network);
 304         os_free(bssid);
 305         return reply ? DBUS_HANDLER_RESULT_HANDLED :
 306                 DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 307 }
 308
 309
 310 /**
 311  * wpas_message_handler - dispatch incoming dbus messages
 312  * @connection: connection to the system message bus
 313  * @message: an incoming dbus message
 314  * @user_data: a pointer to a dbus control interface data structure
 315  * Returns: whether or not the message was handled
 316  *
 317  * This function dispatches all incoming dbus messages to the correct
 318  * handlers, depending on what the message's target object path is,
 319  * and what the method call is.
 320  */
 321 static DBusHandlerResult wpas_message_handler(DBusConnection *connection,
 322         DBusMessage *message, void *user_data)
 323 {
 324         struct wpas_dbus_priv *ctrl_iface = user_data;
 325         const char *method;
 326         const char *path;
 327         const char *msg_interface;
 328         DBusMessage *reply = NULL;
 329
 330         method = dbus_message_get_member(message);
 331         path = dbus_message_get_path(message);
 332         msg_interface = dbus_message_get_interface(message);
 333         if (!method || !path || !ctrl_iface || !msg_interface)
 334                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 335
 336         wpa_printf(MSG_MSGDUMP, "dbus[old]: %s.%s (%s) [%s]",
 337                    msg_interface, method, path,
 338                    dbus_message_get_signature(message));
 339
 340         /* Validate the method interface */
 341         if (strcmp(msg_interface, WPAS_DBUS_INTERFACE) != 0)
 342                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 343
 344         if (!strcmp(path, WPAS_DBUS_PATH)) {
 345                 /* dispatch methods against our global dbus interface here */
 346                 if (!strcmp(method, "addInterface")) {
 347                         reply = wpas_dbus_global_add_interface(
 348                                 message, ctrl_iface->global);
 349                 } else if (!strcmp(method, "removeInterface")) {
 350                         reply = wpas_dbus_global_remove_interface(
 351                                 message, ctrl_iface->global);
 352                 } else if (!strcmp(method, "getInterface")) {
 353                         reply = wpas_dbus_global_get_interface(
 354                                 message, ctrl_iface->global);
 355                 } else if (!strcmp(method, "setDebugParams")) {
 356                         reply = wpas_dbus_global_set_debugparams(
 357                                 message, ctrl_iface->global);
 358                 }
 359         }
 360
 361         /* If the message was handled, send back the reply */
 362         if (reply) {
 363                 if (!dbus_message_get_no_reply(message))
 364                         dbus_connection_send(connection, reply, NULL);
 365                 dbus_message_unref(reply);
 366         }
 367
 368         return reply ? DBUS_HANDLER_RESULT_HANDLED :
 369                 DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 370 }
 371
 372
 373 /**
 374  * wpa_supplicant_dbus_notify_scan_results - Send a scan results signal
 375  * @wpa_s: %wpa_supplicant network interface data
 376  * Returns: 0 on success, -1 on failure
 377  *
 378  * Notify listeners that this interface has updated scan results.
 379  */
 380 void wpa_supplicant_dbus_notify_scan_results(struct wpa_supplicant *wpa_s)
 381 {
 382         struct wpas_dbus_priv *iface = wpa_s->global->dbus;
 383         DBusMessage *_signal;
 384
 385         /* Do nothing if the control interface is not turned on */
 386         if (iface == NULL || !wpa_s->dbus_path)
 387                 return;
 388
 389         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 390                                           WPAS_DBUS_IFACE_INTERFACE,
 391                                           "ScanResultsAvailable");
 392         if (_signal == NULL) {
 393                 wpa_printf(MSG_ERROR,
 394                            "dbus: Not enough memory to send scan results signal");
 395                 return;
 396         }
 397         dbus_connection_send(iface->con, _signal, NULL);
 398         dbus_message_unref(_signal);
 399 }
 400
 401
 402 /**
 403  * wpa_supplicant_dbus_notify_state_change - Send a state change signal
 404  * @wpa_s: %wpa_supplicant network interface data
 405  * @new_state: new state wpa_supplicant is entering
 406  * @old_state: old state wpa_supplicant is leaving
 407  * Returns: 0 on success, -1 on failure
 408  *
 409  * Notify listeners that wpa_supplicant has changed state
 410  */
 411 void wpa_supplicant_dbus_notify_state_change(struct wpa_supplicant *wpa_s,
 412                                              enum wpa_states new_state,
 413                                              enum wpa_states old_state)
 414 {
 415         struct wpas_dbus_priv *iface;
 416         DBusMessage *_signal = NULL;
 417         const char *new_state_str, *old_state_str;
 418
 419         if (wpa_s->dbus_path == NULL)
 420                 return; /* Skip signal since D-Bus setup is not yet ready */
 421
 422         /* Do nothing if the control interface is not turned on */
 423         if (wpa_s->global == NULL)
 424                 return;
 425         iface = wpa_s->global->dbus;
 426         if (iface == NULL)
 427                 return;
 428
 429         /* Only send signal if state really changed */
 430         if (new_state == old_state)
 431                 return;
 432
 433         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 434                                           WPAS_DBUS_IFACE_INTERFACE,
 435                                           "StateChange");
 436         if (_signal == NULL) {
 437                 wpa_printf(MSG_ERROR,
 438                            "dbus: %s: could not create dbus signal; likely out of memory",
 439                            __func__);
 440                 return;
 441         }
 442
 443         new_state_str = wpa_supplicant_state_txt(new_state);
 444         old_state_str = wpa_supplicant_state_txt(old_state);
 445
 446         if (!dbus_message_append_args(_signal,
 447                                       DBUS_TYPE_STRING, &new_state_str,
 448                                       DBUS_TYPE_STRING, &old_state_str,
 449                                       DBUS_TYPE_INVALID)) {
 450                 wpa_printf(MSG_ERROR,
 451                            "dbus: %s: Not enough memory to construct state change signal",
 452                            __func__);
 453                 goto out;
 454         }
 455
 456         dbus_connection_send(iface->con, _signal, NULL);
 457
 458 out:
 459         dbus_message_unref(_signal);
 460 }
 461
 462
 463 /**
 464  * wpa_supplicant_dbus_notify_scanning - send scanning status
 465  * @wpa_s: %wpa_supplicant network interface data
 466  * Returns: 0 on success, -1 on failure
 467  *
 468  * Notify listeners of interface scanning state changes
 469  */
 470 void wpa_supplicant_dbus_notify_scanning(struct wpa_supplicant *wpa_s)
 471 {
 472         struct wpas_dbus_priv *iface = wpa_s->global->dbus;
 473         DBusMessage *_signal;
 474         dbus_bool_t scanning = wpa_s->scanning ? TRUE : FALSE;
 475
 476         /* Do nothing if the control interface is not turned on */
 477         if (iface == NULL || !wpa_s->dbus_path)
 478                 return;
 479
 480         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 481                                           WPAS_DBUS_IFACE_INTERFACE,
 482                                           "Scanning");
 483         if (_signal == NULL) {
 484                 wpa_printf(MSG_ERROR,
 485                            "dbus: Not enough memory to send scan results signal");
 486                 return;
 487         }
 488
 489         if (dbus_message_append_args(_signal,
 490                                      DBUS_TYPE_BOOLEAN, &scanning,
 491                                      DBUS_TYPE_INVALID)) {
 492                 dbus_connection_send(iface->con, _signal, NULL);
 493         } else {
 494                 wpa_printf(MSG_ERROR,
 495                            "dbus: Not enough memory to construct signal");
 496         }
 497         dbus_message_unref(_signal);
 498 }
 499
 500
 501 #ifdef CONFIG_WPS
 502 void wpa_supplicant_dbus_notify_wps_cred(struct wpa_supplicant *wpa_s,
 503                                          const struct wps_credential *cred)
 504 {
 505         struct wpas_dbus_priv *iface;
 506         DBusMessage *_signal = NULL;
 507
 508         /* Do nothing if the control interface is not turned on */
 509         if (wpa_s->global == NULL)
 510                 return;
 511         iface = wpa_s->global->dbus;
 512         if (iface == NULL || !wpa_s->dbus_path)
 513                 return;
 514
 515         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 516                                           WPAS_DBUS_IFACE_INTERFACE,
 517                                           "WpsCred");
 518         if (_signal == NULL) {
 519                 wpa_printf(MSG_ERROR,
 520                            "dbus: %s: Could not create dbus signal; likely out of memory",
 521                            __func__);
 522                 return;
 523         }
 524
 525         if (!dbus_message_append_args(_signal,
 526                                       DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
 527                                       &cred->cred_attr, cred->cred_attr_len,
 528                                       DBUS_TYPE_INVALID)) {
 529                 wpa_printf(MSG_ERROR,
 530                            "dbus: %s: Not enough memory to construct signal",
 531                            __func__);
 532                 goto out;
 533         }
 534
 535         dbus_connection_send(iface->con, _signal, NULL);
 536
 537 out:
 538         dbus_message_unref(_signal);
 539 }
 540 #else /* CONFIG_WPS */
 541 void wpa_supplicant_dbus_notify_wps_cred(struct wpa_supplicant *wpa_s,
 542                                          const struct wps_credential *cred)
 543 {
 544 }
 545 #endif /* CONFIG_WPS */
 546
 547 void wpa_supplicant_dbus_notify_certification(struct wpa_supplicant *wpa_s,
 548                                               int depth, const char *subject,
 549                                               const char *cert_hash,
 550                                               const struct wpabuf *cert)
 551 {
 552         struct wpas_dbus_priv *iface;
 553         DBusMessage *_signal = NULL;
 554         const char *hash;
 555         const char *cert_hex;
 556         int cert_hex_len;
 557
 558         /* Do nothing if the control interface is not turned on */
 559         if (wpa_s->global == NULL)
 560                 return;
 561         iface = wpa_s->global->dbus;
 562         if (iface == NULL || !wpa_s->dbus_path)
 563                 return;
 564
 565         _signal = dbus_message_new_signal(wpa_s->dbus_path,
 566                                           WPAS_DBUS_IFACE_INTERFACE,
 567                                           "Certification");
 568         if (_signal == NULL) {
 569                 wpa_printf(MSG_ERROR,
 570                            "dbus: %s: Could not create dbus signal; likely out of memory",
 571                            __func__);
 572                 return;
 573         }
 574
 575         hash = cert_hash ? cert_hash : "";
 576         cert_hex = cert ? wpabuf_head(cert) : "";
 577         cert_hex_len = cert ? wpabuf_len(cert) : 0;
 578
 579         if (!dbus_message_append_args(_signal,
 580                                       DBUS_TYPE_INT32, &depth,
 581                                       DBUS_TYPE_STRING, &subject,
 582                                       DBUS_TYPE_STRING, &hash,
 583                                       DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
 584                                       &cert_hex, cert_hex_len,
 585                                       DBUS_TYPE_INVALID)) {
 586                 wpa_printf(MSG_ERROR,
 587                            "dbus: %s: Not enough memory to construct signal",
 588                            __func__);
 589                 goto out;
 590         }
 591
 592         dbus_connection_send(iface->con, _signal, NULL);
 593
 594 out:
 595         dbus_message_unref(_signal);
 596
 597 }
 598
 599
 600 /**
 601  * wpa_supplicant_dbus_ctrl_iface_init - Initialize dbus control interface
 602  * @global: Pointer to global data from wpa_supplicant_init()
 603  * Returns: 0 on success, -1 on failure
 604  *
 605  * Initialize the dbus control interface and start receiving commands from
 606  * external programs over the bus.
 607  */
 608 int wpa_supplicant_dbus_ctrl_iface_init(struct wpas_dbus_priv *iface)
 609 {
 610         DBusError error;
 611         int ret = -1;
 612         DBusObjectPathVTable wpas_vtable = {
 613                 NULL, &wpas_message_handler, NULL, NULL, NULL, NULL
 614         };
 615
 616         /* Register the message handler for the global dbus interface */
 617         if (!dbus_connection_register_object_path(iface->con,
 618                                                   WPAS_DBUS_PATH, &wpas_vtable,
 619                                                   iface)) {
 620                 wpa_printf(MSG_ERROR, "dbus: Could not set up message handler");
 621                 return -1;
 622         }
 623
 624         /* Register our service with the message bus */
 625         dbus_error_init(&error);
 626         switch (dbus_bus_request_name(iface->con, WPAS_DBUS_SERVICE,
 627                                       0, &error)) {
 628         case DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER:
 629                 ret = 0;
 630                 break;
 631         case DBUS_REQUEST_NAME_REPLY_EXISTS:
 632         case DBUS_REQUEST_NAME_REPLY_IN_QUEUE:
 633         case DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER:
 634                 wpa_printf(MSG_ERROR,
 635                            "dbus: Could not request service name: already registered");
 636                 break;
 637         default:
 638                 wpa_printf(MSG_ERROR,
 639                            "dbus: Could not request service name: %s %s",
 640                            error.name, error.message);
 641                 break;
 642         }
 643         dbus_error_free(&error);
 644
 645         if (ret != 0)
 646                 return -1;
 647
 648         wpa_printf(MSG_DEBUG, "Providing DBus service '" WPAS_DBUS_SERVICE
 649                    "'.");
 650
 651         return 0;
 652 }
 653
 654
 655 /**
 656  * wpas_dbus_register_new_iface - Register a new interface with dbus
 657  * @wpa_s: %wpa_supplicant interface description structure to register
 658  * Returns: 0 on success, -1 on error
 659  *
 660  * Registers a new interface with dbus and assigns it a dbus object path.
 661  */
 662 int wpas_dbus_register_iface(struct wpa_supplicant *wpa_s)
 663 {
 664         struct wpas_dbus_priv *ctrl_iface = wpa_s->global->dbus;
 665         DBusConnection * con;
 666         u32 next;
 667         DBusObjectPathVTable vtable = {
 668                 NULL, &wpas_iface_message_handler, NULL, NULL, NULL, NULL
 669         };
 670
 671         /* Do nothing if the control interface is not turned on */
 672         if (ctrl_iface == NULL)
 673                 return 0;
 674
 675         con = ctrl_iface->con;
 676         next = ctrl_iface->next_objid++;
 677
 678         /* Create and set the interface's object path */
 679         wpa_s->dbus_path = os_zalloc(WPAS_DBUS_OBJECT_PATH_MAX);
 680         if (wpa_s->dbus_path == NULL)
 681                 return -1;
 682         os_snprintf(wpa_s->dbus_path, WPAS_DBUS_OBJECT_PATH_MAX,
 683                     WPAS_DBUS_PATH_INTERFACES "/%u",
 684                     next);
 685
 686         /* Register the message handler for the interface functions */
 687         if (!dbus_connection_register_fallback(con, wpa_s->dbus_path, &vtable,
 688                                                wpa_s)) {
 689                 wpa_printf(MSG_ERROR,
 690                            "dbus: Could not set up message handler for interface %s",
 691                            wpa_s->ifname);
 692                 return -1;
 693         }
 694
 695         return 0;
 696 }
 697
 698
 699 /**
 700  * wpas_dbus_unregister_iface - Unregister an interface from dbus
 701  * @wpa_s: wpa_supplicant interface structure
 702  * Returns: 0 on success, -1 on failure
 703  *
 704  * Unregisters the interface with dbus
 705  */
 706 int wpas_dbus_unregister_iface(struct wpa_supplicant *wpa_s)
 707 {
 708         struct wpas_dbus_priv *ctrl_iface;
 709         DBusConnection *con;
 710
 711         /* Do nothing if the control interface is not turned on */
 712         if (wpa_s == NULL || wpa_s->global == NULL)
 713                 return 0;
 714         ctrl_iface = wpa_s->global->dbus;
 715         if (ctrl_iface == NULL || wpa_s->dbus_path == NULL)
 716                 return 0;
 717
 718         con = ctrl_iface->con;
 719         if (!dbus_connection_unregister_object_path(con, wpa_s->dbus_path))
 720                 return -1;
 721
 722         os_free(wpa_s->dbus_path);
 723         wpa_s->dbus_path = NULL;
 724
 725         return 0;
 726 }
 727
 728
 729 /**
 730  * wpa_supplicant_get_iface_by_dbus_path - Get a new network interface
 731  * @global: Pointer to global data from wpa_supplicant_init()
 732  * @path: Pointer to a dbus object path representing an interface
 733  * Returns: Pointer to the interface or %NULL if not found
 734  */
 735 struct wpa_supplicant * wpa_supplicant_get_iface_by_dbus_path(
 736         struct wpa_global *global, const char *path)
 737 {
 738         struct wpa_supplicant *wpa_s;
 739
 740         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
 741                 if (wpa_s->dbus_path && strcmp(wpa_s->dbus_path, path) == 0)
 742                         return wpa_s;
 743         }
 744         return NULL;
 745 }