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