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 */ 33char * 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 */ 93DBusMessage * 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 */ 108DBusMessage * 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 */ 122static 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 */ 138static 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 */ 170static 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 */ 202static 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 296out: 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 */ 316static 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 */ 371void 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 */ 402void 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 if (new_state_str == NULL || old_state_str == NULL) { 438 wpa_printf(MSG_ERROR, 439 "dbus: wpa_supplicant_dbus_notify_state_change: " 440 "Could not convert state strings"); 441 goto out; 442 } 443 444 if (!dbus_message_append_args(_signal, 445 DBUS_TYPE_STRING, &new_state_str, 446 DBUS_TYPE_STRING, &old_state_str, 447 DBUS_TYPE_INVALID)) { 448 wpa_printf(MSG_ERROR, 449 "dbus: wpa_supplicant_dbus_notify_state_change: " 450 "Not enough memory to construct state change " 451 "signal"); 452 goto out; 453 } 454 455 dbus_connection_send(iface->con, _signal, NULL); 456 457out: 458 dbus_message_unref(_signal); 459} 460 461 462/** 463 * wpa_supplicant_dbus_notify_scanning - send scanning status 464 * @wpa_s: %wpa_supplicant network interface data 465 * Returns: 0 on success, -1 on failure 466 * 467 * Notify listeners of interface scanning state changes 468 */ 469void wpa_supplicant_dbus_notify_scanning(struct wpa_supplicant *wpa_s) 470{ 471 struct wpas_dbus_priv *iface = wpa_s->global->dbus; 472 DBusMessage *_signal; 473 dbus_bool_t scanning = wpa_s->scanning ? TRUE : FALSE; 474 475 /* Do nothing if the control interface is not turned on */ 476 if (iface == NULL) 477 return; 478 479 _signal = dbus_message_new_signal(wpa_s->dbus_path, 480 WPAS_DBUS_IFACE_INTERFACE, 481 "Scanning"); 482 if (_signal == NULL) { 483 wpa_printf(MSG_ERROR, "dbus: Not enough memory to send scan " 484 "results signal"); 485 return; 486 } 487 488 if (dbus_message_append_args(_signal, 489 DBUS_TYPE_BOOLEAN, &scanning, 490 DBUS_TYPE_INVALID)) { 491 dbus_connection_send(iface->con, _signal, NULL); 492 } else { 493 wpa_printf(MSG_ERROR, "dbus: Not enough memory to construct " 494 "signal"); 495 } 496 dbus_message_unref(_signal); 497} 498 499 500#ifdef CONFIG_WPS 501void wpa_supplicant_dbus_notify_wps_cred(struct wpa_supplicant *wpa_s, 502 const struct wps_credential *cred) 503{ 504 struct wpas_dbus_priv *iface; 505 DBusMessage *_signal = NULL; 506 507 /* Do nothing if the control interface is not turned on */ 508 if (wpa_s->global == NULL) 509 return; 510 iface = wpa_s->global->dbus; 511 if (iface == NULL) 512 return; 513 514 _signal = dbus_message_new_signal(wpa_s->dbus_path, 515 WPAS_DBUS_IFACE_INTERFACE, 516 "WpsCred"); 517 if (_signal == NULL) { 518 wpa_printf(MSG_ERROR, 519 "dbus: wpa_supplicant_dbus_notify_wps_cred: " 520 "Could not create dbus signal; likely out of " 521 "memory"); 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: wpa_supplicant_dbus_notify_wps_cred: " 531 "Not enough memory to construct signal"); 532 goto out; 533 } 534 535 dbus_connection_send(iface->con, _signal, NULL); 536 537out: 538 dbus_message_unref(_signal); 539} 540#else /* CONFIG_WPS */ 541void wpa_supplicant_dbus_notify_wps_cred(struct wpa_supplicant *wpa_s, 542 const struct wps_credential *cred) 543{ 544} 545#endif /* CONFIG_WPS */ 546 547void 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) 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: wpa_supplicant_dbus_notify_certification: " 571 "Could not create dbus signal; likely out of " 572 "memory"); 573 return; 574 } 575 576 hash = cert_hash ? cert_hash : ""; 577 cert_hex = cert ? wpabuf_head(cert) : ""; 578 cert_hex_len = cert ? wpabuf_len(cert) : 0; 579 580 if (!dbus_message_append_args(_signal, 581 DBUS_TYPE_INT32,&depth, 582 DBUS_TYPE_STRING, &subject, 583 DBUS_TYPE_STRING, &hash, 584 DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE, 585 &cert_hex, cert_hex_len, 586 DBUS_TYPE_INVALID)) { 587 wpa_printf(MSG_ERROR, 588 "dbus: wpa_supplicant_dbus_notify_certification: " 589 "Not enough memory to construct signal"); 590 goto out; 591 } 592 593 dbus_connection_send(iface->con, _signal, NULL); 594 595out: 596 dbus_message_unref(_signal); 597 598} 599 600 601/** 602 * wpa_supplicant_dbus_ctrl_iface_init - Initialize dbus control interface 603 * @global: Pointer to global data from wpa_supplicant_init() 604 * Returns: 0 on success, -1 on failure 605 * 606 * Initialize the dbus control interface and start receiving commands from 607 * external programs over the bus. 608 */ 609int wpa_supplicant_dbus_ctrl_iface_init(struct wpas_dbus_priv *iface) 610{ 611 DBusError error; 612 int ret = -1; 613 DBusObjectPathVTable wpas_vtable = { 614 NULL, &wpas_message_handler, NULL, NULL, NULL, NULL 615 }; 616 617 /* Register the message handler for the global dbus interface */ 618 if (!dbus_connection_register_object_path(iface->con, 619 WPAS_DBUS_PATH, &wpas_vtable, 620 iface)) { 621 wpa_printf(MSG_ERROR, "dbus: Could not set up message " 622 "handler"); 623 return -1; 624 } 625 626 /* Register our service with the message bus */ 627 dbus_error_init(&error); 628 switch (dbus_bus_request_name(iface->con, WPAS_DBUS_SERVICE, 629 0, &error)) { 630 case DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER: 631 ret = 0; 632 break; 633 case DBUS_REQUEST_NAME_REPLY_EXISTS: 634 case DBUS_REQUEST_NAME_REPLY_IN_QUEUE: 635 case DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER: 636 wpa_printf(MSG_ERROR, "dbus: Could not request service name: " 637 "already registered"); 638 break; 639 default: 640 wpa_printf(MSG_ERROR, "dbus: Could not request service name: " 641 "%s %s", error.name, error.message); 642 break; 643 } 644 dbus_error_free(&error); 645 646 if (ret != 0) 647 return -1; 648 649 wpa_printf(MSG_DEBUG, "Providing DBus service '" WPAS_DBUS_SERVICE 650 "'."); 651 652 return 0; 653} 654 655 656/** 657 * wpas_dbus_register_new_iface - Register a new interface with dbus 658 * @wpa_s: %wpa_supplicant interface description structure to register 659 * Returns: 0 on success, -1 on error 660 * 661 * Registers a new interface with dbus and assigns it a dbus object path. 662 */ 663int wpas_dbus_register_iface(struct wpa_supplicant *wpa_s) 664{ 665 struct wpas_dbus_priv *ctrl_iface = wpa_s->global->dbus; 666 DBusConnection * con; 667 u32 next; 668 DBusObjectPathVTable vtable = { 669 NULL, &wpas_iface_message_handler, NULL, NULL, NULL, NULL 670 }; 671 672 /* Do nothing if the control interface is not turned on */ 673 if (ctrl_iface == NULL) 674 return 0; 675 676 con = ctrl_iface->con; 677 next = ctrl_iface->next_objid++; 678 679 /* Create and set the interface's object path */ 680 wpa_s->dbus_path = os_zalloc(WPAS_DBUS_OBJECT_PATH_MAX); 681 if (wpa_s->dbus_path == NULL) 682 return -1; 683 os_snprintf(wpa_s->dbus_path, WPAS_DBUS_OBJECT_PATH_MAX, 684 WPAS_DBUS_PATH_INTERFACES "/%u", 685 next); 686 687 /* Register the message handler for the interface functions */ 688 if (!dbus_connection_register_fallback(con, wpa_s->dbus_path, &vtable, 689 wpa_s)) { 690 wpa_printf(MSG_ERROR, "dbus: Could not set up message " 691 "handler for interface %s", 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 */ 706int 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) 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 */ 735struct 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 (strcmp(wpa_s->dbus_path, path) == 0) 742 return wpa_s; 743 } 744 return NULL; 745} 746