1 /* 2 * Wi-Fi Direct - P2P module 3 * Copyright (c) 2009-2010, Atheros Communications 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 11 #include "common.h" 12 #include "eloop.h" 13 #include "common/defs.h" 14 #include "common/ieee802_11_defs.h" 15 #include "common/ieee802_11_common.h" 16 #include "common/wpa_ctrl.h" 17 #include "crypto/sha256.h" 18 #include "crypto/crypto.h" 19 #include "wps/wps_i.h" 20 #include "p2p_i.h" 21 #include "p2p.h" 22 23 24 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx); 25 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev); 26 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 27 const u8 *sa, const u8 *data, size_t len, 28 int rx_freq); 29 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 30 const u8 *sa, const u8 *data, 31 size_t len); 32 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx); 33 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx); 34 35 36 /* 37 * p2p_scan recovery timeout 38 * 39 * Many drivers are using 30 second timeout on scan results. Allow a bit larger 40 * timeout for this to avoid hitting P2P timeout unnecessarily. 41 */ 42 #define P2P_SCAN_TIMEOUT 35 43 44 /** 45 * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer 46 * entries will be removed 47 */ 48 #ifndef P2P_PEER_EXPIRATION_AGE 49 #define P2P_PEER_EXPIRATION_AGE 60 50 #endif /* P2P_PEER_EXPIRATION_AGE */ 51 52 53 void p2p_expire_peers(struct p2p_data *p2p) 54 { 55 struct p2p_device *dev, *n; 56 struct os_reltime now; 57 size_t i; 58 59 os_get_reltime(&now); 60 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) { 61 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec) 62 continue; 63 64 if (dev == p2p->go_neg_peer) { 65 /* 66 * GO Negotiation is in progress with the peer, so 67 * don't expire the peer entry until GO Negotiation 68 * fails or times out. 69 */ 70 continue; 71 } 72 73 if (p2p->cfg->go_connected && 74 p2p->cfg->go_connected(p2p->cfg->cb_ctx, 75 dev->info.p2p_device_addr)) { 76 /* 77 * We are connected as a client to a group in which the 78 * peer is the GO, so do not expire the peer entry. 79 */ 80 os_get_reltime(&dev->last_seen); 81 continue; 82 } 83 84 for (i = 0; i < p2p->num_groups; i++) { 85 if (p2p_group_is_client_connected( 86 p2p->groups[i], dev->info.p2p_device_addr)) 87 break; 88 } 89 if (i < p2p->num_groups) { 90 /* 91 * The peer is connected as a client in a group where 92 * we are the GO, so do not expire the peer entry. 93 */ 94 os_get_reltime(&dev->last_seen); 95 continue; 96 } 97 98 p2p_dbg(p2p, "Expiring old peer entry " MACSTR, 99 MAC2STR(dev->info.p2p_device_addr)); 100 dl_list_del(&dev->list); 101 p2p_device_free(p2p, dev); 102 } 103 } 104 105 106 static const char * p2p_state_txt(int state) 107 { 108 switch (state) { 109 case P2P_IDLE: 110 return "IDLE"; 111 case P2P_SEARCH: 112 return "SEARCH"; 113 case P2P_CONNECT: 114 return "CONNECT"; 115 case P2P_CONNECT_LISTEN: 116 return "CONNECT_LISTEN"; 117 case P2P_GO_NEG: 118 return "GO_NEG"; 119 case P2P_LISTEN_ONLY: 120 return "LISTEN_ONLY"; 121 case P2P_WAIT_PEER_CONNECT: 122 return "WAIT_PEER_CONNECT"; 123 case P2P_WAIT_PEER_IDLE: 124 return "WAIT_PEER_IDLE"; 125 case P2P_SD_DURING_FIND: 126 return "SD_DURING_FIND"; 127 case P2P_PROVISIONING: 128 return "PROVISIONING"; 129 case P2P_PD_DURING_FIND: 130 return "PD_DURING_FIND"; 131 case P2P_INVITE: 132 return "INVITE"; 133 case P2P_INVITE_LISTEN: 134 return "INVITE_LISTEN"; 135 default: 136 return "?"; 137 } 138 } 139 140 141 const char * p2p_get_state_txt(struct p2p_data *p2p) 142 { 143 return p2p_state_txt(p2p->state); 144 } 145 146 147 struct p2ps_advertisement * p2p_get_p2ps_adv_list(struct p2p_data *p2p) 148 { 149 return p2p ? p2p->p2ps_adv_list : NULL; 150 } 151 152 153 void p2p_set_intended_addr(struct p2p_data *p2p, const u8 *intended_addr) 154 { 155 if (p2p && intended_addr) 156 os_memcpy(p2p->intended_addr, intended_addr, ETH_ALEN); 157 } 158 159 160 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr) 161 { 162 struct p2p_device *dev = NULL; 163 164 if (!addr || !p2p) 165 return 0; 166 167 dev = p2p_get_device(p2p, addr); 168 if (dev) 169 return dev->wps_prov_info; 170 else 171 return 0; 172 } 173 174 175 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr) 176 { 177 struct p2p_device *dev = NULL; 178 179 if (!addr || !p2p) 180 return; 181 182 dev = p2p_get_device(p2p, addr); 183 if (dev) 184 dev->wps_prov_info = 0; 185 } 186 187 188 void p2p_set_state(struct p2p_data *p2p, int new_state) 189 { 190 p2p_dbg(p2p, "State %s -> %s", 191 p2p_state_txt(p2p->state), p2p_state_txt(new_state)); 192 p2p->state = new_state; 193 194 if (new_state == P2P_IDLE && p2p->pending_channel) { 195 p2p_dbg(p2p, "Apply change in listen channel"); 196 p2p->cfg->reg_class = p2p->pending_reg_class; 197 p2p->cfg->channel = p2p->pending_channel; 198 p2p->pending_reg_class = 0; 199 p2p->pending_channel = 0; 200 } 201 } 202 203 204 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec) 205 { 206 p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec", 207 p2p_state_txt(p2p->state), sec, usec); 208 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 209 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL); 210 } 211 212 213 void p2p_clear_timeout(struct p2p_data *p2p) 214 { 215 p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state)); 216 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 217 } 218 219 220 void p2p_go_neg_failed(struct p2p_data *p2p, int status) 221 { 222 struct p2p_go_neg_results res; 223 struct p2p_device *peer = p2p->go_neg_peer; 224 225 if (!peer) 226 return; 227 228 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL); 229 if (p2p->state != P2P_SEARCH) { 230 /* 231 * Clear timeouts related to GO Negotiation if no new p2p_find 232 * has been started. 233 */ 234 p2p_clear_timeout(p2p); 235 p2p_set_state(p2p, P2P_IDLE); 236 } 237 238 peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 239 peer->wps_method = WPS_NOT_READY; 240 peer->oob_pw_id = 0; 241 wpabuf_free(peer->go_neg_conf); 242 peer->go_neg_conf = NULL; 243 p2p->go_neg_peer = NULL; 244 245 os_memset(&res, 0, sizeof(res)); 246 res.status = status; 247 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 248 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 249 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 250 } 251 252 253 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc) 254 { 255 unsigned int r, tu; 256 int freq; 257 struct wpabuf *ies; 258 259 p2p_dbg(p2p, "Starting short listen state (state=%s)", 260 p2p_state_txt(p2p->state)); 261 262 if (p2p->pending_listen_freq) { 263 /* We have a pending p2p_listen request */ 264 p2p_dbg(p2p, "p2p_listen command pending already"); 265 return; 266 } 267 268 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 269 if (freq < 0) { 270 p2p_dbg(p2p, "Unknown regulatory class/channel"); 271 return; 272 } 273 274 if (os_get_random((u8 *) &r, sizeof(r)) < 0) 275 r = 0; 276 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) + 277 p2p->min_disc_int) * 100; 278 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu) 279 tu = p2p->max_disc_tu; 280 if (!dev_disc && tu < 100) 281 tu = 100; /* Need to wait in non-device discovery use cases */ 282 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen) 283 tu = p2p->cfg->max_listen * 1000 / 1024; 284 285 if (tu == 0) { 286 p2p_dbg(p2p, "Skip listen state since duration was 0 TU"); 287 p2p_set_timeout(p2p, 0, 0); 288 return; 289 } 290 291 ies = p2p_build_probe_resp_ies(p2p, NULL, 0); 292 if (ies == NULL) 293 return; 294 295 p2p->pending_listen_freq = freq; 296 p2p->pending_listen_sec = 0; 297 p2p->pending_listen_usec = 1024 * tu; 298 299 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000, 300 ies) < 0) { 301 p2p_dbg(p2p, "Failed to start listen mode"); 302 p2p->pending_listen_freq = 0; 303 } 304 wpabuf_free(ies); 305 } 306 307 308 int p2p_listen(struct p2p_data *p2p, unsigned int timeout) 309 { 310 int freq; 311 struct wpabuf *ies; 312 313 p2p_dbg(p2p, "Going to listen(only) state"); 314 315 if (p2p->pending_listen_freq) { 316 /* We have a pending p2p_listen request */ 317 p2p_dbg(p2p, "p2p_listen command pending already"); 318 return -1; 319 } 320 321 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 322 if (freq < 0) { 323 p2p_dbg(p2p, "Unknown regulatory class/channel"); 324 return -1; 325 } 326 327 p2p->pending_listen_sec = timeout / 1000; 328 p2p->pending_listen_usec = (timeout % 1000) * 1000; 329 330 if (p2p->p2p_scan_running) { 331 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) { 332 p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen"); 333 return 0; 334 } 335 p2p_dbg(p2p, "p2p_scan running - delay start of listen state"); 336 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN; 337 return 0; 338 } 339 340 ies = p2p_build_probe_resp_ies(p2p, NULL, 0); 341 if (ies == NULL) 342 return -1; 343 344 p2p->pending_listen_freq = freq; 345 346 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) { 347 p2p_dbg(p2p, "Failed to start listen mode"); 348 p2p->pending_listen_freq = 0; 349 wpabuf_free(ies); 350 return -1; 351 } 352 wpabuf_free(ies); 353 354 p2p_set_state(p2p, P2P_LISTEN_ONLY); 355 356 return 0; 357 } 358 359 360 static void p2p_device_clear_reported(struct p2p_data *p2p) 361 { 362 struct p2p_device *dev; 363 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 364 dev->flags &= ~P2P_DEV_REPORTED; 365 dev->sd_reqs = 0; 366 } 367 } 368 369 370 /** 371 * p2p_get_device - Fetch a peer entry 372 * @p2p: P2P module context from p2p_init() 373 * @addr: P2P Device Address of the peer 374 * Returns: Pointer to the device entry or %NULL if not found 375 */ 376 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr) 377 { 378 struct p2p_device *dev; 379 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 380 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0) 381 return dev; 382 } 383 return NULL; 384 } 385 386 387 /** 388 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address 389 * @p2p: P2P module context from p2p_init() 390 * @addr: P2P Interface Address of the peer 391 * Returns: Pointer to the device entry or %NULL if not found 392 */ 393 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p, 394 const u8 *addr) 395 { 396 struct p2p_device *dev; 397 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 398 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0) 399 return dev; 400 } 401 return NULL; 402 } 403 404 405 /** 406 * p2p_create_device - Create a peer entry 407 * @p2p: P2P module context from p2p_init() 408 * @addr: P2P Device Address of the peer 409 * Returns: Pointer to the device entry or %NULL on failure 410 * 411 * If there is already an entry for the peer, it will be returned instead of 412 * creating a new one. 413 */ 414 static struct p2p_device * p2p_create_device(struct p2p_data *p2p, 415 const u8 *addr) 416 { 417 struct p2p_device *dev, *oldest = NULL; 418 size_t count = 0; 419 420 dev = p2p_get_device(p2p, addr); 421 if (dev) 422 return dev; 423 424 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 425 count++; 426 if (oldest == NULL || 427 os_reltime_before(&dev->last_seen, &oldest->last_seen)) 428 oldest = dev; 429 } 430 if (count + 1 > p2p->cfg->max_peers && oldest) { 431 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer"); 432 dl_list_del(&oldest->list); 433 p2p_device_free(p2p, oldest); 434 } 435 436 dev = os_zalloc(sizeof(*dev)); 437 if (dev == NULL) 438 return NULL; 439 dl_list_add(&p2p->devices, &dev->list); 440 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN); 441 442 return dev; 443 } 444 445 446 static void p2p_copy_client_info(struct p2p_device *dev, 447 struct p2p_client_info *cli) 448 { 449 p2p_copy_filter_devname(dev->info.device_name, 450 sizeof(dev->info.device_name), 451 cli->dev_name, cli->dev_name_len); 452 dev->info.dev_capab = cli->dev_capab; 453 dev->info.config_methods = cli->config_methods; 454 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8); 455 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types; 456 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types, 457 dev->info.wps_sec_dev_type_list_len); 458 } 459 460 461 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr, 462 const u8 *go_interface_addr, int freq, 463 const u8 *gi, size_t gi_len, 464 struct os_reltime *rx_time) 465 { 466 struct p2p_group_info info; 467 size_t c; 468 struct p2p_device *dev; 469 470 if (gi == NULL) 471 return 0; 472 473 if (p2p_group_info_parse(gi, gi_len, &info) < 0) 474 return -1; 475 476 /* 477 * Clear old data for this group; if the devices are still in the 478 * group, the information will be restored in the loop following this. 479 */ 480 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 481 if (os_memcmp(dev->member_in_go_iface, go_interface_addr, 482 ETH_ALEN) == 0) { 483 os_memset(dev->member_in_go_iface, 0, ETH_ALEN); 484 os_memset(dev->member_in_go_dev, 0, ETH_ALEN); 485 } 486 } 487 488 for (c = 0; c < info.num_clients; c++) { 489 struct p2p_client_info *cli = &info.client[c]; 490 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr, 491 ETH_ALEN) == 0) 492 continue; /* ignore our own entry */ 493 dev = p2p_get_device(p2p, cli->p2p_device_addr); 494 if (dev) { 495 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY | 496 P2P_DEV_PROBE_REQ_ONLY)) { 497 /* 498 * Update information since we have not 499 * received this directly from the client. 500 */ 501 p2p_copy_client_info(dev, cli); 502 } else { 503 /* 504 * Need to update P2P Client Discoverability 505 * flag since it is valid only in P2P Group 506 * Info attribute. 507 */ 508 dev->info.dev_capab &= 509 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 510 dev->info.dev_capab |= 511 cli->dev_capab & 512 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 513 } 514 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 515 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 516 } 517 } else { 518 dev = p2p_create_device(p2p, cli->p2p_device_addr); 519 if (dev == NULL) 520 continue; 521 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 522 p2p_copy_client_info(dev, cli); 523 dev->oper_freq = freq; 524 p2p->cfg->dev_found(p2p->cfg->cb_ctx, 525 dev->info.p2p_device_addr, 526 &dev->info, 1); 527 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 528 } 529 530 os_memcpy(dev->interface_addr, cli->p2p_interface_addr, 531 ETH_ALEN); 532 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime)); 533 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN); 534 os_memcpy(dev->member_in_go_iface, go_interface_addr, 535 ETH_ALEN); 536 dev->flags |= P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT; 537 } 538 539 return 0; 540 } 541 542 543 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev, 544 int probe_req, const struct p2p_message *msg) 545 { 546 os_memcpy(dev->info.device_name, msg->device_name, 547 sizeof(dev->info.device_name)); 548 549 if (msg->manufacturer && 550 msg->manufacturer_len < sizeof(dev->info.manufacturer)) { 551 os_memset(dev->info.manufacturer, 0, 552 sizeof(dev->info.manufacturer)); 553 os_memcpy(dev->info.manufacturer, msg->manufacturer, 554 msg->manufacturer_len); 555 } 556 557 if (msg->model_name && 558 msg->model_name_len < sizeof(dev->info.model_name)) { 559 os_memset(dev->info.model_name, 0, 560 sizeof(dev->info.model_name)); 561 os_memcpy(dev->info.model_name, msg->model_name, 562 msg->model_name_len); 563 } 564 565 if (msg->model_number && 566 msg->model_number_len < sizeof(dev->info.model_number)) { 567 os_memset(dev->info.model_number, 0, 568 sizeof(dev->info.model_number)); 569 os_memcpy(dev->info.model_number, msg->model_number, 570 msg->model_number_len); 571 } 572 573 if (msg->serial_number && 574 msg->serial_number_len < sizeof(dev->info.serial_number)) { 575 os_memset(dev->info.serial_number, 0, 576 sizeof(dev->info.serial_number)); 577 os_memcpy(dev->info.serial_number, msg->serial_number, 578 msg->serial_number_len); 579 } 580 581 if (msg->pri_dev_type) 582 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type, 583 sizeof(dev->info.pri_dev_type)); 584 else if (msg->wps_pri_dev_type) 585 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type, 586 sizeof(dev->info.pri_dev_type)); 587 588 if (msg->wps_sec_dev_type_list) { 589 os_memcpy(dev->info.wps_sec_dev_type_list, 590 msg->wps_sec_dev_type_list, 591 msg->wps_sec_dev_type_list_len); 592 dev->info.wps_sec_dev_type_list_len = 593 msg->wps_sec_dev_type_list_len; 594 } 595 596 if (msg->capability) { 597 /* 598 * P2P Client Discoverability bit is reserved in all frames 599 * that use this function, so do not change its value here. 600 */ 601 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 602 dev->info.dev_capab |= msg->capability[0] & 603 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 604 dev->info.group_capab = msg->capability[1]; 605 } 606 607 if (msg->ext_listen_timing) { 608 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing); 609 dev->ext_listen_interval = 610 WPA_GET_LE16(msg->ext_listen_timing + 2); 611 } 612 613 if (!probe_req) { 614 u16 new_config_methods; 615 new_config_methods = msg->config_methods ? 616 msg->config_methods : msg->wps_config_methods; 617 if (new_config_methods && 618 dev->info.config_methods != new_config_methods) { 619 p2p_dbg(p2p, "Update peer " MACSTR 620 " config_methods 0x%x -> 0x%x", 621 MAC2STR(dev->info.p2p_device_addr), 622 dev->info.config_methods, 623 new_config_methods); 624 dev->info.config_methods = new_config_methods; 625 } 626 } 627 } 628 629 630 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies, 631 size_t ies_len) 632 { 633 const u8 *pos, *end; 634 u8 id, len; 635 636 wpabuf_free(dev->info.vendor_elems); 637 dev->info.vendor_elems = NULL; 638 639 end = ies + ies_len; 640 641 for (pos = ies; end - pos > 1; pos += len) { 642 id = *pos++; 643 len = *pos++; 644 645 if (len > end - pos) 646 break; 647 648 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3) 649 continue; 650 651 if (len >= 4) { 652 u32 type = WPA_GET_BE32(pos); 653 654 if (type == WPA_IE_VENDOR_TYPE || 655 type == WMM_IE_VENDOR_TYPE || 656 type == WPS_IE_VENDOR_TYPE || 657 type == P2P_IE_VENDOR_TYPE || 658 type == WFD_IE_VENDOR_TYPE) 659 continue; 660 } 661 662 /* Unknown vendor element - make raw IE data available */ 663 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0) 664 break; 665 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len); 666 } 667 } 668 669 670 static int p2p_compare_wfd_info(struct p2p_device *dev, 671 const struct p2p_message *msg) 672 { 673 if (dev->info.wfd_subelems && msg->wfd_subelems) { 674 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used) 675 return 1; 676 677 return os_memcmp(dev->info.wfd_subelems->buf, 678 msg->wfd_subelems->buf, 679 dev->info.wfd_subelems->used); 680 } 681 if (dev->info.wfd_subelems || msg->wfd_subelems) 682 return 1; 683 684 return 0; 685 } 686 687 688 /** 689 * p2p_add_device - Add peer entries based on scan results or P2P frames 690 * @p2p: P2P module context from p2p_init() 691 * @addr: Source address of Beacon or Probe Response frame (may be either 692 * P2P Device Address or P2P Interface Address) 693 * @level: Signal level (signal strength of the received frame from the peer) 694 * @freq: Frequency on which the Beacon or Probe Response frame was received 695 * @rx_time: Time when the result was received 696 * @ies: IEs from the Beacon or Probe Response frame 697 * @ies_len: Length of ies buffer in octets 698 * @scan_res: Whether this was based on scan results 699 * Returns: 0 on success, -1 on failure 700 * 701 * If the scan result is for a GO, the clients in the group will also be added 702 * to the peer table. This function can also be used with some other frames 703 * like Provision Discovery Request that contains P2P Capability and P2P Device 704 * Info attributes. 705 */ 706 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq, 707 struct os_reltime *rx_time, int level, const u8 *ies, 708 size_t ies_len, int scan_res) 709 { 710 struct p2p_device *dev; 711 struct p2p_message msg; 712 const u8 *p2p_dev_addr; 713 int wfd_changed; 714 int i; 715 struct os_reltime time_now; 716 717 os_memset(&msg, 0, sizeof(msg)); 718 if (p2p_parse_ies(ies, ies_len, &msg)) { 719 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry"); 720 p2p_parse_free(&msg); 721 return -1; 722 } 723 724 if (msg.p2p_device_addr) 725 p2p_dev_addr = msg.p2p_device_addr; 726 else if (msg.device_id) 727 p2p_dev_addr = msg.device_id; 728 else { 729 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 730 p2p_parse_free(&msg); 731 return -1; 732 } 733 734 if (!is_zero_ether_addr(p2p->peer_filter) && 735 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) { 736 p2p_dbg(p2p, "Do not add peer filter for " MACSTR 737 " due to peer filter", MAC2STR(p2p_dev_addr)); 738 p2p_parse_free(&msg); 739 return 0; 740 } 741 742 dev = p2p_create_device(p2p, p2p_dev_addr); 743 if (dev == NULL) { 744 p2p_parse_free(&msg); 745 return -1; 746 } 747 748 if (rx_time == NULL) { 749 os_get_reltime(&time_now); 750 rx_time = &time_now; 751 } 752 753 /* 754 * Update the device entry only if the new peer 755 * entry is newer than the one previously stored, or if 756 * the device was previously seen as a P2P Client in a group 757 * and the new entry isn't older than a threshold. 758 */ 759 if (dev->last_seen.sec > 0 && 760 os_reltime_before(rx_time, &dev->last_seen) && 761 (!(dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT) || 762 os_reltime_expired(&dev->last_seen, rx_time, 763 P2P_DEV_GROUP_CLIENT_RESP_THRESHOLD))) { 764 p2p_dbg(p2p, 765 "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u flags=0x%x)", 766 (unsigned int) rx_time->sec, 767 (unsigned int) rx_time->usec, 768 (unsigned int) dev->last_seen.sec, 769 (unsigned int) dev->last_seen.usec, 770 dev->flags); 771 p2p_parse_free(&msg); 772 return -1; 773 } 774 775 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime)); 776 777 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY | 778 P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT); 779 780 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0) 781 os_memcpy(dev->interface_addr, addr, ETH_ALEN); 782 if (msg.ssid && 783 msg.ssid[1] <= sizeof(dev->oper_ssid) && 784 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 785 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 786 != 0)) { 787 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]); 788 dev->oper_ssid_len = msg.ssid[1]; 789 } 790 791 wpabuf_free(dev->info.p2ps_instance); 792 dev->info.p2ps_instance = NULL; 793 if (msg.adv_service_instance && msg.adv_service_instance_len) 794 dev->info.p2ps_instance = wpabuf_alloc_copy( 795 msg.adv_service_instance, msg.adv_service_instance_len); 796 797 if (freq >= 2412 && freq <= 2484 && msg.ds_params && 798 *msg.ds_params >= 1 && *msg.ds_params <= 14) { 799 int ds_freq; 800 if (*msg.ds_params == 14) 801 ds_freq = 2484; 802 else 803 ds_freq = 2407 + *msg.ds_params * 5; 804 if (freq != ds_freq) { 805 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz", 806 freq, ds_freq); 807 freq = ds_freq; 808 } 809 } 810 811 if (dev->listen_freq && dev->listen_freq != freq && scan_res) { 812 p2p_dbg(p2p, "Update Listen frequency based on scan results (" 813 MACSTR " %d -> %d MHz (DS param %d)", 814 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq, 815 freq, msg.ds_params ? *msg.ds_params : -1); 816 } 817 if (scan_res) { 818 dev->listen_freq = freq; 819 if (msg.group_info) 820 dev->oper_freq = freq; 821 } 822 dev->info.level = level; 823 824 p2p_copy_wps_info(p2p, dev, 0, &msg); 825 826 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 827 wpabuf_free(dev->info.wps_vendor_ext[i]); 828 dev->info.wps_vendor_ext[i] = NULL; 829 } 830 831 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 832 if (msg.wps_vendor_ext[i] == NULL) 833 break; 834 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy( 835 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]); 836 if (dev->info.wps_vendor_ext[i] == NULL) 837 break; 838 } 839 840 wfd_changed = p2p_compare_wfd_info(dev, &msg); 841 842 if (msg.wfd_subelems) { 843 wpabuf_free(dev->info.wfd_subelems); 844 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 845 } 846 847 if (scan_res) { 848 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq, 849 msg.group_info, msg.group_info_len, 850 rx_time); 851 } 852 853 p2p_parse_free(&msg); 854 855 p2p_update_peer_vendor_elems(dev, ies, ies_len); 856 857 if (dev->flags & P2P_DEV_REPORTED && !wfd_changed && 858 (!msg.adv_service_instance || 859 (dev->flags & P2P_DEV_P2PS_REPORTED))) 860 return 0; 861 862 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)", 863 freq, (unsigned int) rx_time->sec, 864 (unsigned int) rx_time->usec); 865 if (dev->flags & P2P_DEV_USER_REJECTED) { 866 p2p_dbg(p2p, "Do not report rejected device"); 867 return 0; 868 } 869 870 if (dev->info.config_methods == 0 && 871 (freq == 2412 || freq == 2437 || freq == 2462)) { 872 /* 873 * If we have only seen a Beacon frame from a GO, we do not yet 874 * know what WPS config methods it supports. Since some 875 * applications use config_methods value from P2P-DEVICE-FOUND 876 * events, postpone reporting this peer until we've fully 877 * discovered its capabilities. 878 * 879 * At least for now, do this only if the peer was detected on 880 * one of the social channels since that peer can be easily be 881 * found again and there are no limitations of having to use 882 * passive scan on this channels, so this can be done through 883 * Probe Response frame that includes the config_methods 884 * information. 885 */ 886 p2p_dbg(p2p, "Do not report peer " MACSTR 887 " with unknown config methods", MAC2STR(addr)); 888 return 0; 889 } 890 891 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 892 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 893 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 894 895 if (msg.adv_service_instance) 896 dev->flags |= P2P_DEV_P2PS_REPORTED; 897 898 return 0; 899 } 900 901 902 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev) 903 { 904 int i; 905 906 if (p2p->go_neg_peer == dev) { 907 /* 908 * If GO Negotiation is in progress, report that it has failed. 909 */ 910 p2p_go_neg_failed(p2p, -1); 911 } 912 if (p2p->invite_peer == dev) 913 p2p->invite_peer = NULL; 914 if (p2p->sd_peer == dev) 915 p2p->sd_peer = NULL; 916 if (p2p->pending_client_disc_go == dev) 917 p2p->pending_client_disc_go = NULL; 918 919 /* dev_lost() device, but only if it was previously dev_found() */ 920 if (dev->flags & P2P_DEV_REPORTED_ONCE) 921 p2p->cfg->dev_lost(p2p->cfg->cb_ctx, 922 dev->info.p2p_device_addr); 923 924 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 925 wpabuf_free(dev->info.wps_vendor_ext[i]); 926 dev->info.wps_vendor_ext[i] = NULL; 927 } 928 929 wpabuf_free(dev->info.wfd_subelems); 930 wpabuf_free(dev->info.vendor_elems); 931 wpabuf_free(dev->go_neg_conf); 932 wpabuf_free(dev->info.p2ps_instance); 933 934 os_free(dev); 935 } 936 937 938 static int p2p_get_next_prog_freq(struct p2p_data *p2p) 939 { 940 struct p2p_channels *c; 941 struct p2p_reg_class *cla; 942 size_t cl, ch; 943 int found = 0; 944 u8 reg_class; 945 u8 channel; 946 int freq; 947 948 c = &p2p->cfg->channels; 949 for (cl = 0; cl < c->reg_classes; cl++) { 950 cla = &c->reg_class[cl]; 951 if (cla->reg_class != p2p->last_prog_scan_class) 952 continue; 953 for (ch = 0; ch < cla->channels; ch++) { 954 if (cla->channel[ch] == p2p->last_prog_scan_chan) { 955 found = 1; 956 break; 957 } 958 } 959 if (found) 960 break; 961 } 962 963 if (!found) { 964 /* Start from beginning */ 965 reg_class = c->reg_class[0].reg_class; 966 channel = c->reg_class[0].channel[0]; 967 } else { 968 /* Pick the next channel */ 969 ch++; 970 if (ch == cla->channels) { 971 cl++; 972 if (cl == c->reg_classes) 973 cl = 0; 974 ch = 0; 975 } 976 reg_class = c->reg_class[cl].reg_class; 977 channel = c->reg_class[cl].channel[ch]; 978 } 979 980 freq = p2p_channel_to_freq(reg_class, channel); 981 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz", 982 reg_class, channel, freq); 983 p2p->last_prog_scan_class = reg_class; 984 p2p->last_prog_scan_chan = channel; 985 986 if (freq == 2412 || freq == 2437 || freq == 2462) 987 return 0; /* No need to add social channels */ 988 return freq; 989 } 990 991 992 static void p2p_search(struct p2p_data *p2p) 993 { 994 int freq = 0; 995 enum p2p_scan_type type; 996 u16 pw_id = DEV_PW_DEFAULT; 997 int res; 998 999 if (p2p->drv_in_listen) { 1000 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing"); 1001 return; 1002 } 1003 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1004 1005 if (p2p->find_type == P2P_FIND_PROGRESSIVE && 1006 (freq = p2p_get_next_prog_freq(p2p)) > 0) { 1007 type = P2P_SCAN_SOCIAL_PLUS_ONE; 1008 p2p_dbg(p2p, "Starting search (+ freq %u)", freq); 1009 } else { 1010 type = P2P_SCAN_SOCIAL; 1011 p2p_dbg(p2p, "Starting search"); 1012 } 1013 1014 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq, 1015 p2p->num_req_dev_types, p2p->req_dev_types, 1016 p2p->find_dev_id, pw_id); 1017 if (res < 0) { 1018 p2p_dbg(p2p, "Scan request schedule failed"); 1019 p2p_continue_find(p2p); 1020 } 1021 } 1022 1023 1024 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx) 1025 { 1026 struct p2p_data *p2p = eloop_ctx; 1027 p2p_dbg(p2p, "Find timeout -> stop"); 1028 p2p_stop_find(p2p); 1029 } 1030 1031 1032 void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status) 1033 { 1034 if (status != 0) { 1035 p2p_dbg(p2p, "Scan request failed"); 1036 /* Do continue find even for the first p2p_find_scan */ 1037 p2p_continue_find(p2p); 1038 } else { 1039 p2p_dbg(p2p, "Running p2p_scan"); 1040 p2p->p2p_scan_running = 1; 1041 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 1042 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 1043 p2p, NULL); 1044 } 1045 } 1046 1047 1048 static int p2p_run_after_scan(struct p2p_data *p2p) 1049 { 1050 struct p2p_device *dev; 1051 enum p2p_after_scan op; 1052 1053 if (p2p->after_scan_tx) { 1054 p2p->after_scan_tx_in_progress = 1; 1055 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion"); 1056 p2p->cfg->send_action(p2p->cfg->cb_ctx, 1057 p2p->after_scan_tx->freq, 1058 p2p->after_scan_tx->dst, 1059 p2p->after_scan_tx->src, 1060 p2p->after_scan_tx->bssid, 1061 (u8 *) (p2p->after_scan_tx + 1), 1062 p2p->after_scan_tx->len, 1063 p2p->after_scan_tx->wait_time); 1064 os_free(p2p->after_scan_tx); 1065 p2p->after_scan_tx = NULL; 1066 return 1; 1067 } 1068 1069 op = p2p->start_after_scan; 1070 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1071 switch (op) { 1072 case P2P_AFTER_SCAN_NOTHING: 1073 break; 1074 case P2P_AFTER_SCAN_LISTEN: 1075 p2p_dbg(p2p, "Start previously requested Listen state"); 1076 p2p_listen(p2p, p2p->pending_listen_sec * 1000 + 1077 p2p->pending_listen_usec / 1000); 1078 return 1; 1079 case P2P_AFTER_SCAN_CONNECT: 1080 p2p_dbg(p2p, "Start previously requested connect with " MACSTR, 1081 MAC2STR(p2p->after_scan_peer)); 1082 dev = p2p_get_device(p2p, p2p->after_scan_peer); 1083 if (dev == NULL) { 1084 p2p_dbg(p2p, "Peer not known anymore"); 1085 break; 1086 } 1087 p2p_connect_send(p2p, dev); 1088 return 1; 1089 } 1090 1091 return 0; 1092 } 1093 1094 1095 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx) 1096 { 1097 struct p2p_data *p2p = eloop_ctx; 1098 int running; 1099 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running); 1100 running = p2p->p2p_scan_running; 1101 /* Make sure we recover from missed scan results callback */ 1102 p2p->p2p_scan_running = 0; 1103 1104 if (running) 1105 p2p_run_after_scan(p2p); 1106 } 1107 1108 1109 static void p2p_free_req_dev_types(struct p2p_data *p2p) 1110 { 1111 p2p->num_req_dev_types = 0; 1112 os_free(p2p->req_dev_types); 1113 p2p->req_dev_types = NULL; 1114 } 1115 1116 1117 static int p2ps_gen_hash(struct p2p_data *p2p, const char *str, u8 *hash) 1118 { 1119 u8 buf[SHA256_MAC_LEN]; 1120 char str_buf[256]; 1121 const u8 *adv_array; 1122 size_t i, adv_len; 1123 1124 if (!str || !hash) 1125 return 0; 1126 1127 if (!str[0]) { 1128 os_memcpy(hash, p2p->wild_card_hash, P2PS_HASH_LEN); 1129 return 1; 1130 } 1131 1132 adv_array = (u8 *) str_buf; 1133 adv_len = os_strlen(str); 1134 if (adv_len >= sizeof(str_buf)) 1135 return 0; 1136 1137 for (i = 0; i < adv_len; i++) { 1138 if (str[i] >= 'A' && str[i] <= 'Z') 1139 str_buf[i] = str[i] - 'A' + 'a'; 1140 else 1141 str_buf[i] = str[i]; 1142 } 1143 1144 if (sha256_vector(1, &adv_array, &adv_len, buf)) 1145 return 0; 1146 1147 os_memcpy(hash, buf, P2PS_HASH_LEN); 1148 return 1; 1149 } 1150 1151 1152 int p2p_find(struct p2p_data *p2p, unsigned int timeout, 1153 enum p2p_discovery_type type, 1154 unsigned int num_req_dev_types, const u8 *req_dev_types, 1155 const u8 *dev_id, unsigned int search_delay, 1156 u8 seek_count, const char **seek, int freq) 1157 { 1158 int res; 1159 1160 p2p_dbg(p2p, "Starting find (type=%d)", type); 1161 os_get_reltime(&p2p->find_start); 1162 if (p2p->p2p_scan_running) { 1163 p2p_dbg(p2p, "p2p_scan is already running"); 1164 } 1165 1166 p2p_free_req_dev_types(p2p); 1167 if (req_dev_types && num_req_dev_types) { 1168 p2p->req_dev_types = os_malloc(num_req_dev_types * 1169 WPS_DEV_TYPE_LEN); 1170 if (p2p->req_dev_types == NULL) 1171 return -1; 1172 os_memcpy(p2p->req_dev_types, req_dev_types, 1173 num_req_dev_types * WPS_DEV_TYPE_LEN); 1174 p2p->num_req_dev_types = num_req_dev_types; 1175 } 1176 1177 if (dev_id) { 1178 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN); 1179 p2p->find_dev_id = p2p->find_dev_id_buf; 1180 } else 1181 p2p->find_dev_id = NULL; 1182 1183 if (seek_count == 0 || !seek) { 1184 /* Not an ASP search */ 1185 p2p->p2ps_seek = 0; 1186 } else if (seek_count == 1 && seek && (!seek[0] || !seek[0][0])) { 1187 /* 1188 * An empty seek string means no hash values, but still an ASP 1189 * search. 1190 */ 1191 p2p_dbg(p2p, "ASP search"); 1192 p2p->p2ps_seek_count = 0; 1193 p2p->p2ps_seek = 1; 1194 } else if (seek && seek_count <= P2P_MAX_QUERY_HASH) { 1195 u8 buf[P2PS_HASH_LEN]; 1196 int i, count = 0; 1197 1198 for (i = 0; i < seek_count; i++) { 1199 if (!p2ps_gen_hash(p2p, seek[i], buf)) 1200 continue; 1201 1202 p2p_dbg(p2p, "Seek service %s hash " MACSTR, 1203 seek[i], MAC2STR(buf)); 1204 os_memcpy(&p2p->p2ps_seek_hash[count * P2PS_HASH_LEN], 1205 buf, P2PS_HASH_LEN); 1206 count++; 1207 } 1208 1209 p2p->p2ps_seek_count = count; 1210 p2p->p2ps_seek = 1; 1211 } else { 1212 p2p->p2ps_seek_count = 0; 1213 p2p->p2ps_seek = 1; 1214 } 1215 1216 /* Special case to perform wildcard search */ 1217 if (p2p->p2ps_seek_count == 0 && p2p->p2ps_seek) { 1218 p2p->p2ps_seek_count = 1; 1219 os_memcpy(&p2p->p2ps_seek_hash, p2p->wild_card_hash, 1220 P2PS_HASH_LEN); 1221 } 1222 1223 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1224 p2p_clear_timeout(p2p); 1225 if (p2p->pending_listen_freq) { 1226 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_find"); 1227 p2p->pending_listen_freq = 0; 1228 } 1229 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1230 p2p->find_type = type; 1231 p2p_device_clear_reported(p2p); 1232 os_memset(p2p->sd_query_no_ack, 0, ETH_ALEN); 1233 p2p_set_state(p2p, P2P_SEARCH); 1234 p2p->search_delay = search_delay; 1235 p2p->in_search_delay = 0; 1236 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1237 p2p->last_p2p_find_timeout = timeout; 1238 if (timeout) 1239 eloop_register_timeout(timeout, 0, p2p_find_timeout, 1240 p2p, NULL); 1241 switch (type) { 1242 case P2P_FIND_START_WITH_FULL: 1243 if (freq > 0) { 1244 /* 1245 * Start with the specified channel and then move to 1246 * social channels only scans. 1247 */ 1248 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, 1249 P2P_SCAN_SPECIFIC, freq, 1250 p2p->num_req_dev_types, 1251 p2p->req_dev_types, dev_id, 1252 DEV_PW_DEFAULT); 1253 break; 1254 } 1255 /* fall through */ 1256 case P2P_FIND_PROGRESSIVE: 1257 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0, 1258 p2p->num_req_dev_types, 1259 p2p->req_dev_types, dev_id, 1260 DEV_PW_DEFAULT); 1261 break; 1262 case P2P_FIND_ONLY_SOCIAL: 1263 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0, 1264 p2p->num_req_dev_types, 1265 p2p->req_dev_types, dev_id, 1266 DEV_PW_DEFAULT); 1267 break; 1268 default: 1269 return -1; 1270 } 1271 1272 if (res != 0 && p2p->p2p_scan_running) { 1273 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running"); 1274 /* wait for the previous p2p_scan to complete */ 1275 res = 0; /* do not report failure */ 1276 } else if (res != 0) { 1277 p2p_dbg(p2p, "Failed to start p2p_scan"); 1278 p2p_set_state(p2p, P2P_IDLE); 1279 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1280 } 1281 1282 return res; 1283 } 1284 1285 1286 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq) 1287 { 1288 p2p_dbg(p2p, "Stopping find"); 1289 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1290 p2p_clear_timeout(p2p); 1291 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND) 1292 p2p->cfg->find_stopped(p2p->cfg->cb_ctx); 1293 1294 p2p->p2ps_seek_count = 0; 1295 1296 p2p_set_state(p2p, P2P_IDLE); 1297 p2p_free_req_dev_types(p2p); 1298 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1299 if (p2p->go_neg_peer) 1300 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1301 p2p->go_neg_peer = NULL; 1302 p2p->sd_peer = NULL; 1303 p2p->invite_peer = NULL; 1304 p2p_stop_listen_for_freq(p2p, freq); 1305 p2p->send_action_in_progress = 0; 1306 } 1307 1308 1309 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq) 1310 { 1311 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) { 1312 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response"); 1313 return; 1314 } 1315 if (p2p->in_listen) { 1316 p2p->in_listen = 0; 1317 p2p_clear_timeout(p2p); 1318 } 1319 if (p2p->drv_in_listen) { 1320 /* 1321 * The driver may not deliver callback to p2p_listen_end() 1322 * when the operation gets canceled, so clear the internal 1323 * variable that is tracking driver state. 1324 */ 1325 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen); 1326 p2p->drv_in_listen = 0; 1327 } 1328 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1329 } 1330 1331 1332 void p2p_stop_listen(struct p2p_data *p2p) 1333 { 1334 if (p2p->state != P2P_LISTEN_ONLY) { 1335 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state."); 1336 return; 1337 } 1338 1339 p2p_stop_listen_for_freq(p2p, 0); 1340 p2p_set_state(p2p, P2P_IDLE); 1341 } 1342 1343 1344 void p2p_stop_find(struct p2p_data *p2p) 1345 { 1346 p2p->pending_listen_freq = 0; 1347 p2p_stop_find_for_freq(p2p, 0); 1348 } 1349 1350 1351 static int p2p_prepare_channel_pref(struct p2p_data *p2p, 1352 unsigned int force_freq, 1353 unsigned int pref_freq, int go) 1354 { 1355 u8 op_class, op_channel; 1356 unsigned int freq = force_freq ? force_freq : pref_freq; 1357 1358 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d", 1359 force_freq, pref_freq, go); 1360 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) { 1361 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq); 1362 return -1; 1363 } 1364 1365 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) && 1366 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class, 1367 op_channel))) { 1368 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P", 1369 freq, op_class, op_channel); 1370 return -1; 1371 } 1372 1373 p2p->op_reg_class = op_class; 1374 p2p->op_channel = op_channel; 1375 1376 if (force_freq) { 1377 p2p->channels.reg_classes = 1; 1378 p2p->channels.reg_class[0].channels = 1; 1379 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 1380 p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 1381 } else { 1382 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1383 sizeof(struct p2p_channels)); 1384 } 1385 1386 return 0; 1387 } 1388 1389 1390 static void p2p_prepare_channel_best(struct p2p_data *p2p) 1391 { 1392 u8 op_class, op_channel; 1393 const int op_classes_5ghz[] = { 124, 125, 115, 0 }; 1394 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 }; 1395 const int op_classes_vht[] = { 128, 0 }; 1396 1397 p2p_dbg(p2p, "Prepare channel best"); 1398 1399 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 && 1400 p2p_supported_freq(p2p, p2p->best_freq_overall) && 1401 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel) 1402 == 0) { 1403 p2p_dbg(p2p, "Select best overall channel as operating channel preference"); 1404 p2p->op_reg_class = op_class; 1405 p2p->op_channel = op_channel; 1406 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 && 1407 p2p_supported_freq(p2p, p2p->best_freq_5) && 1408 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel) 1409 == 0) { 1410 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference"); 1411 p2p->op_reg_class = op_class; 1412 p2p->op_channel = op_channel; 1413 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 && 1414 p2p_supported_freq(p2p, p2p->best_freq_24) && 1415 p2p_freq_to_channel(p2p->best_freq_24, &op_class, 1416 &op_channel) == 0) { 1417 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference"); 1418 p2p->op_reg_class = op_class; 1419 p2p->op_channel = op_channel; 1420 } else if (p2p->cfg->num_pref_chan > 0 && 1421 p2p_channels_includes(&p2p->cfg->channels, 1422 p2p->cfg->pref_chan[0].op_class, 1423 p2p->cfg->pref_chan[0].chan)) { 1424 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference"); 1425 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class; 1426 p2p->op_channel = p2p->cfg->pref_chan[0].chan; 1427 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht, 1428 &p2p->op_reg_class, &p2p->op_channel) == 1429 0) { 1430 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference", 1431 p2p->op_reg_class, p2p->op_channel); 1432 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40, 1433 &p2p->op_reg_class, &p2p->op_channel) == 1434 0) { 1435 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference", 1436 p2p->op_reg_class, p2p->op_channel); 1437 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz, 1438 &p2p->op_reg_class, &p2p->op_channel) == 1439 0) { 1440 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference", 1441 p2p->op_reg_class, p2p->op_channel); 1442 } else if (p2p_channels_includes(&p2p->cfg->channels, 1443 p2p->cfg->op_reg_class, 1444 p2p->cfg->op_channel)) { 1445 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference"); 1446 p2p->op_reg_class = p2p->cfg->op_reg_class; 1447 p2p->op_channel = p2p->cfg->op_channel; 1448 } else if (p2p_channel_random_social(&p2p->cfg->channels, 1449 &p2p->op_reg_class, 1450 &p2p->op_channel) == 0) { 1451 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference", 1452 p2p->op_reg_class, p2p->op_channel); 1453 } else { 1454 /* Select any random available channel from the first available 1455 * operating class */ 1456 p2p_channel_select(&p2p->cfg->channels, NULL, 1457 &p2p->op_reg_class, 1458 &p2p->op_channel); 1459 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference", 1460 p2p->op_channel, p2p->op_reg_class); 1461 } 1462 1463 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1464 sizeof(struct p2p_channels)); 1465 } 1466 1467 1468 /** 1469 * p2p_prepare_channel - Select operating channel for GO Negotiation or P2PS PD 1470 * @p2p: P2P module context from p2p_init() 1471 * @dev: Selected peer device 1472 * @force_freq: Forced frequency in MHz or 0 if not forced 1473 * @pref_freq: Preferred frequency in MHz or 0 if no preference 1474 * @go: Whether the local end will be forced to be GO 1475 * Returns: 0 on success, -1 on failure (channel not supported for P2P) 1476 * 1477 * This function is used to do initial operating channel selection for GO 1478 * Negotiation prior to having received peer information or for P2PS PD 1479 * signalling. The selected channel may be further optimized in 1480 * p2p_reselect_channel() once the peer information is available. 1481 */ 1482 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev, 1483 unsigned int force_freq, unsigned int pref_freq, int go) 1484 { 1485 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d", 1486 force_freq, pref_freq, go); 1487 if (force_freq || pref_freq) { 1488 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) < 1489 0) 1490 return -1; 1491 } else { 1492 p2p_prepare_channel_best(p2p); 1493 } 1494 p2p_channels_dump(p2p, "prepared channels", &p2p->channels); 1495 if (go) 1496 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq); 1497 else if (!force_freq) 1498 p2p_channels_union_inplace(&p2p->channels, 1499 &p2p->cfg->cli_channels); 1500 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels); 1501 1502 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s", 1503 p2p->op_reg_class, p2p->op_channel, 1504 force_freq ? " (forced)" : ""); 1505 1506 if (force_freq) 1507 dev->flags |= P2P_DEV_FORCE_FREQ; 1508 else 1509 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1510 1511 return 0; 1512 } 1513 1514 1515 static void p2p_set_dev_persistent(struct p2p_device *dev, 1516 int persistent_group) 1517 { 1518 switch (persistent_group) { 1519 case 0: 1520 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP | 1521 P2P_DEV_PREFER_PERSISTENT_RECONN); 1522 break; 1523 case 1: 1524 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP; 1525 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN; 1526 break; 1527 case 2: 1528 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP | 1529 P2P_DEV_PREFER_PERSISTENT_RECONN; 1530 break; 1531 } 1532 } 1533 1534 1535 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr, 1536 enum p2p_wps_method wps_method, 1537 int go_intent, const u8 *own_interface_addr, 1538 unsigned int force_freq, int persistent_group, 1539 const u8 *force_ssid, size_t force_ssid_len, 1540 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id) 1541 { 1542 struct p2p_device *dev; 1543 1544 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR 1545 " GO Intent=%d Intended Interface Address=" MACSTR 1546 " wps_method=%d persistent_group=%d pd_before_go_neg=%d " 1547 "oob_pw_id=%u", 1548 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1549 wps_method, persistent_group, pd_before_go_neg, oob_pw_id); 1550 1551 dev = p2p_get_device(p2p, peer_addr); 1552 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 1553 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR, 1554 MAC2STR(peer_addr)); 1555 return -1; 1556 } 1557 1558 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, 1559 go_intent == 15) < 0) 1560 return -1; 1561 1562 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 1563 if (!(dev->info.dev_capab & 1564 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 1565 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1566 " that is in a group and is not discoverable", 1567 MAC2STR(peer_addr)); 1568 return -1; 1569 } 1570 if (dev->oper_freq <= 0) { 1571 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1572 " with incomplete information", 1573 MAC2STR(peer_addr)); 1574 return -1; 1575 } 1576 1577 /* 1578 * First, try to connect directly. If the peer does not 1579 * acknowledge frames, assume it is sleeping and use device 1580 * discoverability via the GO at that point. 1581 */ 1582 } 1583 1584 p2p->ssid_set = 0; 1585 if (force_ssid) { 1586 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1587 force_ssid, force_ssid_len); 1588 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1589 p2p->ssid_len = force_ssid_len; 1590 p2p->ssid_set = 1; 1591 } 1592 1593 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1594 dev->flags &= ~P2P_DEV_USER_REJECTED; 1595 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 1596 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1597 if (pd_before_go_neg) 1598 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG; 1599 else { 1600 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG; 1601 /* 1602 * Assign dialog token and tie breaker here to use the same 1603 * values in each retry within the same GO Negotiation exchange. 1604 */ 1605 dev->dialog_token++; 1606 if (dev->dialog_token == 0) 1607 dev->dialog_token = 1; 1608 dev->tie_breaker = p2p->next_tie_breaker; 1609 p2p->next_tie_breaker = !p2p->next_tie_breaker; 1610 } 1611 dev->connect_reqs = 0; 1612 dev->go_neg_req_sent = 0; 1613 dev->go_state = UNKNOWN_GO; 1614 p2p_set_dev_persistent(dev, persistent_group); 1615 p2p->go_intent = go_intent; 1616 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1617 1618 if (p2p->state != P2P_IDLE) 1619 p2p_stop_find(p2p); 1620 1621 if (p2p->after_scan_tx) { 1622 /* 1623 * We need to drop the pending frame to avoid issues with the 1624 * new GO Negotiation, e.g., when the pending frame was from a 1625 * previous attempt at starting a GO Negotiation. 1626 */ 1627 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion"); 1628 os_free(p2p->after_scan_tx); 1629 p2p->after_scan_tx = NULL; 1630 } 1631 1632 dev->wps_method = wps_method; 1633 dev->oob_pw_id = oob_pw_id; 1634 dev->status = P2P_SC_SUCCESS; 1635 1636 if (p2p->p2p_scan_running) { 1637 p2p_dbg(p2p, "p2p_scan running - delay connect send"); 1638 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT; 1639 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN); 1640 return 0; 1641 } 1642 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1643 1644 return p2p_connect_send(p2p, dev); 1645 } 1646 1647 1648 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr, 1649 enum p2p_wps_method wps_method, 1650 int go_intent, const u8 *own_interface_addr, 1651 unsigned int force_freq, int persistent_group, 1652 const u8 *force_ssid, size_t force_ssid_len, 1653 unsigned int pref_freq, u16 oob_pw_id) 1654 { 1655 struct p2p_device *dev; 1656 1657 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR 1658 " GO Intent=%d Intended Interface Address=" MACSTR 1659 " wps_method=%d persistent_group=%d oob_pw_id=%u", 1660 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1661 wps_method, persistent_group, oob_pw_id); 1662 1663 dev = p2p_get_device(p2p, peer_addr); 1664 if (dev == NULL) { 1665 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR, 1666 MAC2STR(peer_addr)); 1667 return -1; 1668 } 1669 1670 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent == 1671 15) < 0) 1672 return -1; 1673 1674 p2p->ssid_set = 0; 1675 if (force_ssid) { 1676 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1677 force_ssid, force_ssid_len); 1678 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1679 p2p->ssid_len = force_ssid_len; 1680 p2p->ssid_set = 1; 1681 } 1682 1683 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1684 dev->flags &= ~P2P_DEV_USER_REJECTED; 1685 dev->go_neg_req_sent = 0; 1686 dev->go_state = UNKNOWN_GO; 1687 p2p_set_dev_persistent(dev, persistent_group); 1688 p2p->go_intent = go_intent; 1689 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1690 1691 dev->wps_method = wps_method; 1692 dev->oob_pw_id = oob_pw_id; 1693 dev->status = P2P_SC_SUCCESS; 1694 1695 return 0; 1696 } 1697 1698 1699 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr, 1700 struct p2p_device *dev, struct p2p_message *msg) 1701 { 1702 os_get_reltime(&dev->last_seen); 1703 1704 p2p_copy_wps_info(p2p, dev, 0, msg); 1705 1706 if (msg->listen_channel) { 1707 int freq; 1708 freq = p2p_channel_to_freq(msg->listen_channel[3], 1709 msg->listen_channel[4]); 1710 if (freq < 0) { 1711 p2p_dbg(p2p, "Unknown peer Listen channel: " 1712 "country=%c%c(0x%02x) reg_class=%u channel=%u", 1713 msg->listen_channel[0], 1714 msg->listen_channel[1], 1715 msg->listen_channel[2], 1716 msg->listen_channel[3], 1717 msg->listen_channel[4]); 1718 } else { 1719 p2p_dbg(p2p, "Update peer " MACSTR 1720 " Listen channel: %u -> %u MHz", 1721 MAC2STR(dev->info.p2p_device_addr), 1722 dev->listen_freq, freq); 1723 dev->listen_freq = freq; 1724 } 1725 } 1726 1727 if (msg->wfd_subelems) { 1728 wpabuf_free(dev->info.wfd_subelems); 1729 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems); 1730 } 1731 1732 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 1733 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 1734 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request"); 1735 } else { 1736 p2p_dbg(p2p, "Created device entry based on GO Neg Req: " 1737 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' " 1738 "listen_freq=%d", 1739 MAC2STR(dev->info.p2p_device_addr), 1740 dev->info.dev_capab, dev->info.group_capab, 1741 dev->info.device_name, dev->listen_freq); 1742 } 1743 1744 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY; 1745 1746 if (dev->flags & P2P_DEV_USER_REJECTED) { 1747 p2p_dbg(p2p, "Do not report rejected device"); 1748 return; 1749 } 1750 1751 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 1752 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 1753 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 1754 } 1755 1756 1757 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len) 1758 { 1759 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 1760 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2); 1761 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2], 1762 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len); 1763 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len; 1764 } 1765 1766 1767 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params) 1768 { 1769 if (p2p->ssid_set) { 1770 os_memcpy(params->ssid, p2p->ssid, p2p->ssid_len); 1771 params->ssid_len = p2p->ssid_len; 1772 } else { 1773 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len); 1774 } 1775 p2p->ssid_set = 0; 1776 1777 p2p_random(params->passphrase, p2p->cfg->passphrase_len); 1778 return 0; 1779 } 1780 1781 1782 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer) 1783 { 1784 struct p2p_go_neg_results res; 1785 int go = peer->go_state == LOCAL_GO; 1786 struct p2p_channels intersection; 1787 1788 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)", 1789 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer"); 1790 1791 os_memset(&res, 0, sizeof(res)); 1792 res.role_go = go; 1793 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 1794 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 1795 res.wps_method = peer->wps_method; 1796 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 1797 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 1798 res.persistent_group = 2; 1799 else 1800 res.persistent_group = 1; 1801 } 1802 1803 if (go) { 1804 /* Setup AP mode for WPS provisioning */ 1805 res.freq = p2p_channel_to_freq(p2p->op_reg_class, 1806 p2p->op_channel); 1807 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1808 res.ssid_len = p2p->ssid_len; 1809 p2p_random(res.passphrase, p2p->cfg->passphrase_len); 1810 } else { 1811 res.freq = peer->oper_freq; 1812 if (p2p->ssid_len) { 1813 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1814 res.ssid_len = p2p->ssid_len; 1815 } 1816 } 1817 1818 p2p_channels_dump(p2p, "own channels", &p2p->channels); 1819 p2p_channels_dump(p2p, "peer channels", &peer->channels); 1820 p2p_channels_intersect(&p2p->channels, &peer->channels, 1821 &intersection); 1822 if (go) { 1823 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq); 1824 p2p_channels_dump(p2p, "intersection after no-GO removal", 1825 &intersection); 1826 } 1827 1828 p2p_channels_to_freqs(&intersection, res.freq_list, 1829 P2P_MAX_CHANNELS); 1830 1831 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout; 1832 1833 p2p_clear_timeout(p2p); 1834 p2p->ssid_set = 0; 1835 peer->go_neg_req_sent = 0; 1836 peer->wps_method = WPS_NOT_READY; 1837 peer->oob_pw_id = 0; 1838 wpabuf_free(peer->go_neg_conf); 1839 peer->go_neg_conf = NULL; 1840 1841 p2p_set_state(p2p, P2P_PROVISIONING); 1842 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 1843 } 1844 1845 1846 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa, 1847 const u8 *data, size_t len, int rx_freq) 1848 { 1849 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa)); 1850 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len); 1851 1852 if (len < 1) 1853 return; 1854 1855 switch (data[0]) { 1856 case P2P_GO_NEG_REQ: 1857 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq); 1858 break; 1859 case P2P_GO_NEG_RESP: 1860 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq); 1861 break; 1862 case P2P_GO_NEG_CONF: 1863 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1); 1864 break; 1865 case P2P_INVITATION_REQ: 1866 p2p_process_invitation_req(p2p, sa, data + 1, len - 1, 1867 rx_freq); 1868 break; 1869 case P2P_INVITATION_RESP: 1870 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1); 1871 break; 1872 case P2P_PROV_DISC_REQ: 1873 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1874 break; 1875 case P2P_PROV_DISC_RESP: 1876 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1); 1877 break; 1878 case P2P_DEV_DISC_REQ: 1879 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1880 break; 1881 case P2P_DEV_DISC_RESP: 1882 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1); 1883 break; 1884 default: 1885 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d", 1886 data[0]); 1887 break; 1888 } 1889 } 1890 1891 1892 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, 1893 const u8 *sa, const u8 *bssid, const u8 *data, 1894 size_t len, int freq) 1895 { 1896 if (len < 1) 1897 return; 1898 1899 switch (data[0]) { 1900 case WLAN_PA_VENDOR_SPECIFIC: 1901 data++; 1902 len--; 1903 if (len < 4) 1904 return; 1905 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1906 return; 1907 1908 data += 4; 1909 len -= 4; 1910 1911 p2p_rx_p2p_action(p2p, sa, data, len, freq); 1912 break; 1913 case WLAN_PA_GAS_INITIAL_REQ: 1914 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq); 1915 break; 1916 case WLAN_PA_GAS_INITIAL_RESP: 1917 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq); 1918 break; 1919 case WLAN_PA_GAS_COMEBACK_REQ: 1920 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq); 1921 break; 1922 case WLAN_PA_GAS_COMEBACK_RESP: 1923 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq); 1924 break; 1925 } 1926 } 1927 1928 1929 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa, 1930 const u8 *bssid, u8 category, 1931 const u8 *data, size_t len, int freq) 1932 { 1933 if (category == WLAN_ACTION_PUBLIC) { 1934 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq); 1935 return; 1936 } 1937 1938 if (category != WLAN_ACTION_VENDOR_SPECIFIC) 1939 return; 1940 1941 if (len < 4) 1942 return; 1943 1944 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1945 return; 1946 data += 4; 1947 len -= 4; 1948 1949 /* P2P action frame */ 1950 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa)); 1951 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len); 1952 1953 if (len < 1) 1954 return; 1955 switch (data[0]) { 1956 case P2P_NOA: 1957 p2p_dbg(p2p, "Received P2P Action - Notice of Absence"); 1958 /* TODO */ 1959 break; 1960 case P2P_PRESENCE_REQ: 1961 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq); 1962 break; 1963 case P2P_PRESENCE_RESP: 1964 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1); 1965 break; 1966 case P2P_GO_DISC_REQ: 1967 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq); 1968 break; 1969 default: 1970 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]); 1971 break; 1972 } 1973 } 1974 1975 1976 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx) 1977 { 1978 struct p2p_data *p2p = eloop_ctx; 1979 if (p2p->go_neg_peer == NULL) 1980 return; 1981 if (p2p->pending_listen_freq) { 1982 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start"); 1983 p2p->pending_listen_freq = 0; 1984 } 1985 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1986 p2p->go_neg_peer->status = P2P_SC_SUCCESS; 1987 /* 1988 * Set new timeout to make sure a previously set one does not expire 1989 * too quickly while waiting for the GO Negotiation to complete. 1990 */ 1991 p2p_set_timeout(p2p, 0, 500000); 1992 p2p_connect_send(p2p, p2p->go_neg_peer); 1993 } 1994 1995 1996 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx) 1997 { 1998 struct p2p_data *p2p = eloop_ctx; 1999 if (p2p->invite_peer == NULL) 2000 return; 2001 if (p2p->pending_listen_freq) { 2002 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start"); 2003 p2p->pending_listen_freq = 0; 2004 } 2005 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 2006 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr, 2007 p2p->invite_dev_pw_id); 2008 } 2009 2010 2011 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr, 2012 const u8 *ie, size_t ie_len) 2013 { 2014 struct p2p_message msg; 2015 struct p2p_device *dev; 2016 2017 os_memset(&msg, 0, sizeof(msg)); 2018 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL) 2019 { 2020 p2p_parse_free(&msg); 2021 return; /* not a P2P probe */ 2022 } 2023 2024 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 2025 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 2026 != 0) { 2027 /* The Probe Request is not part of P2P Device Discovery. It is 2028 * not known whether the source address of the frame is the P2P 2029 * Device Address or P2P Interface Address. Do not add a new 2030 * peer entry based on this frames. 2031 */ 2032 p2p_parse_free(&msg); 2033 return; 2034 } 2035 2036 dev = p2p_get_device(p2p, addr); 2037 if (dev) { 2038 if (msg.listen_channel) { 2039 int freq; 2040 2041 if (dev->country[0] == 0) 2042 os_memcpy(dev->country, msg.listen_channel, 3); 2043 2044 freq = p2p_channel_to_freq(msg.listen_channel[3], 2045 msg.listen_channel[4]); 2046 2047 if (freq > 0 && dev->listen_freq != freq) { 2048 p2p_dbg(p2p, 2049 "Updated peer " MACSTR " Listen channel (Probe Request): %d -> %d MHz", 2050 MAC2STR(addr), dev->listen_freq, freq); 2051 dev->listen_freq = freq; 2052 } 2053 } 2054 2055 os_get_reltime(&dev->last_seen); 2056 p2p_parse_free(&msg); 2057 return; /* already known */ 2058 } 2059 2060 dev = p2p_create_device(p2p, addr); 2061 if (dev == NULL) { 2062 p2p_parse_free(&msg); 2063 return; 2064 } 2065 2066 os_get_reltime(&dev->last_seen); 2067 dev->flags |= P2P_DEV_PROBE_REQ_ONLY; 2068 2069 if (msg.listen_channel) { 2070 os_memcpy(dev->country, msg.listen_channel, 3); 2071 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3], 2072 msg.listen_channel[4]); 2073 } 2074 2075 p2p_copy_wps_info(p2p, dev, 1, &msg); 2076 2077 if (msg.wfd_subelems) { 2078 wpabuf_free(dev->info.wfd_subelems); 2079 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 2080 } 2081 2082 p2p_parse_free(&msg); 2083 2084 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR 2085 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d", 2086 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab, 2087 dev->info.group_capab, dev->info.device_name, 2088 dev->listen_freq); 2089 } 2090 2091 2092 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p, 2093 const u8 *addr, 2094 struct p2p_message *msg) 2095 { 2096 struct p2p_device *dev; 2097 2098 dev = p2p_get_device(p2p, addr); 2099 if (dev) { 2100 os_get_reltime(&dev->last_seen); 2101 return dev; /* already known */ 2102 } 2103 2104 dev = p2p_create_device(p2p, addr); 2105 if (dev == NULL) 2106 return NULL; 2107 2108 p2p_add_dev_info(p2p, addr, dev, msg); 2109 2110 return dev; 2111 } 2112 2113 2114 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type) 2115 { 2116 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0) 2117 return 1; 2118 if (os_memcmp(dev_type, req_dev_type, 2) == 0 && 2119 WPA_GET_BE32(&req_dev_type[2]) == 0 && 2120 WPA_GET_BE16(&req_dev_type[6]) == 0) 2121 return 1; /* Category match with wildcard OUI/sub-category */ 2122 return 0; 2123 } 2124 2125 2126 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[], 2127 size_t num_req_dev_type) 2128 { 2129 size_t i; 2130 for (i = 0; i < num_req_dev_type; i++) { 2131 if (dev_type_match(dev_type, req_dev_type[i])) 2132 return 1; 2133 } 2134 return 0; 2135 } 2136 2137 2138 /** 2139 * p2p_match_dev_type - Match local device type with requested type 2140 * @p2p: P2P module context from p2p_init() 2141 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) 2142 * Returns: 1 on match, 0 on mismatch 2143 * 2144 * This function can be used to match the Requested Device Type attribute in 2145 * WPS IE with the local device types for deciding whether to reply to a Probe 2146 * Request frame. 2147 */ 2148 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps) 2149 { 2150 struct wps_parse_attr attr; 2151 size_t i; 2152 2153 if (wps_parse_msg(wps, &attr)) 2154 return 1; /* assume no Requested Device Type attributes */ 2155 2156 if (attr.num_req_dev_type == 0) 2157 return 1; /* no Requested Device Type attributes -> match */ 2158 2159 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type, 2160 attr.num_req_dev_type)) 2161 return 1; /* Own Primary Device Type matches */ 2162 2163 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) { 2164 if (dev_type_list_match(p2p->cfg->sec_dev_type[i], 2165 attr.req_dev_type, 2166 attr.num_req_dev_type)) 2167 return 1; /* Own Secondary Device Type matches */ 2168 } 2169 2170 /* No matching device type found */ 2171 return 0; 2172 } 2173 2174 2175 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p, 2176 const u8 *query_hash, 2177 u8 query_count) 2178 { 2179 struct wpabuf *buf; 2180 u8 *len; 2181 int pw_id = -1; 2182 size_t extra = 0; 2183 2184 #ifdef CONFIG_WIFI_DISPLAY 2185 if (p2p->wfd_ie_probe_resp) 2186 extra = wpabuf_len(p2p->wfd_ie_probe_resp); 2187 #endif /* CONFIG_WIFI_DISPLAY */ 2188 2189 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]) 2190 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]); 2191 2192 if (query_count) 2193 extra += MAX_SVC_ADV_IE_LEN; 2194 2195 buf = wpabuf_alloc(1000 + extra); 2196 if (buf == NULL) 2197 return NULL; 2198 2199 if (p2p->go_neg_peer) { 2200 /* Advertise immediate availability of WPS credential */ 2201 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method); 2202 } 2203 2204 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) { 2205 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response"); 2206 wpabuf_free(buf); 2207 return NULL; 2208 } 2209 2210 #ifdef CONFIG_WIFI_DISPLAY 2211 if (p2p->wfd_ie_probe_resp) 2212 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp); 2213 #endif /* CONFIG_WIFI_DISPLAY */ 2214 2215 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]) 2216 wpabuf_put_buf(buf, 2217 p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]); 2218 2219 /* P2P IE */ 2220 len = p2p_buf_add_ie_hdr(buf); 2221 p2p_buf_add_capability(buf, p2p->dev_capab & 2222 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2223 if (p2p->ext_listen_interval) 2224 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 2225 p2p->ext_listen_interval); 2226 p2p_buf_add_device_info(buf, p2p, NULL); 2227 p2p_buf_update_ie_hdr(buf, len); 2228 2229 if (query_count) { 2230 p2p_buf_add_service_instance(buf, p2p, query_count, query_hash, 2231 p2p->p2ps_adv_list); 2232 } 2233 2234 return buf; 2235 } 2236 2237 static int p2p_build_probe_resp_buf(struct p2p_data *p2p, struct wpabuf *buf, 2238 struct wpabuf *ies, 2239 const u8 *addr, int rx_freq) 2240 { 2241 struct ieee80211_mgmt *resp; 2242 u8 channel, op_class; 2243 2244 resp = wpabuf_put(buf, offsetof(struct ieee80211_mgmt, 2245 u.probe_resp.variable)); 2246 2247 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 2248 (WLAN_FC_STYPE_PROBE_RESP << 4)); 2249 os_memcpy(resp->da, addr, ETH_ALEN); 2250 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN); 2251 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN); 2252 resp->u.probe_resp.beacon_int = host_to_le16(100); 2253 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 2254 resp->u.probe_resp.capab_info = 2255 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE | 2256 WLAN_CAPABILITY_PRIVACY | 2257 WLAN_CAPABILITY_SHORT_SLOT_TIME); 2258 2259 wpabuf_put_u8(buf, WLAN_EID_SSID); 2260 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN); 2261 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 2262 2263 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES); 2264 wpabuf_put_u8(buf, 8); 2265 wpabuf_put_u8(buf, (60 / 5) | 0x80); 2266 wpabuf_put_u8(buf, 90 / 5); 2267 wpabuf_put_u8(buf, (120 / 5) | 0x80); 2268 wpabuf_put_u8(buf, 180 / 5); 2269 wpabuf_put_u8(buf, (240 / 5) | 0x80); 2270 wpabuf_put_u8(buf, 360 / 5); 2271 wpabuf_put_u8(buf, 480 / 5); 2272 wpabuf_put_u8(buf, 540 / 5); 2273 2274 if (!rx_freq) { 2275 channel = p2p->cfg->channel; 2276 } else if (p2p_freq_to_channel(rx_freq, &op_class, &channel)) { 2277 p2p_err(p2p, "Failed to convert freq to channel"); 2278 return -1; 2279 } 2280 2281 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS); 2282 wpabuf_put_u8(buf, 1); 2283 wpabuf_put_u8(buf, channel); 2284 2285 wpabuf_put_buf(buf, ies); 2286 2287 return 0; 2288 } 2289 2290 static int p2p_service_find_asp(struct p2p_data *p2p, const u8 *hash) 2291 { 2292 struct p2ps_advertisement *adv_data; 2293 int any_wfa; 2294 2295 p2p_dbg(p2p, "ASP find - ASP list: %p", p2p->p2ps_adv_list); 2296 2297 /* Wildcard org.wi-fi.wfds matches any WFA spec defined service */ 2298 any_wfa = os_memcmp(hash, p2p->wild_card_hash, P2PS_HASH_LEN) == 0; 2299 2300 adv_data = p2p->p2ps_adv_list; 2301 while (adv_data) { 2302 if (os_memcmp(hash, adv_data->hash, P2PS_HASH_LEN) == 0) 2303 return 1; /* exact hash match */ 2304 if (any_wfa && 2305 os_strncmp(adv_data->svc_name, P2PS_WILD_HASH_STR, 2306 os_strlen(P2PS_WILD_HASH_STR)) == 0) 2307 return 1; /* WFA service match */ 2308 adv_data = adv_data->next; 2309 } 2310 2311 return 0; 2312 } 2313 2314 2315 static enum p2p_probe_req_status 2316 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2317 const u8 *bssid, const u8 *ie, size_t ie_len, 2318 unsigned int rx_freq) 2319 { 2320 struct ieee802_11_elems elems; 2321 struct wpabuf *buf; 2322 struct p2p_message msg; 2323 struct wpabuf *ies; 2324 2325 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) == 2326 ParseFailed) { 2327 /* Ignore invalid Probe Request frames */ 2328 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it"); 2329 return P2P_PREQ_MALFORMED; 2330 } 2331 2332 if (elems.p2p == NULL) { 2333 /* not a P2P probe - ignore it */ 2334 p2p_dbg(p2p, "Not a P2P probe - ignore it"); 2335 return P2P_PREQ_NOT_P2P; 2336 } 2337 2338 if (dst && !is_broadcast_ether_addr(dst) && 2339 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2340 /* Not sent to the broadcast address or our P2P Device Address 2341 */ 2342 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it", 2343 MAC2STR(dst)); 2344 return P2P_PREQ_NOT_PROCESSED; 2345 } 2346 2347 if (bssid && !is_broadcast_ether_addr(bssid)) { 2348 /* Not sent to the Wildcard BSSID */ 2349 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it", 2350 MAC2STR(bssid)); 2351 return P2P_PREQ_NOT_PROCESSED; 2352 } 2353 2354 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN || 2355 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) != 2356 0) { 2357 /* not using P2P Wildcard SSID - ignore */ 2358 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it"); 2359 return P2P_PREQ_NOT_PROCESSED; 2360 } 2361 2362 if (supp_rates_11b_only(&elems)) { 2363 /* Indicates support for 11b rates only */ 2364 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it"); 2365 return P2P_PREQ_NOT_P2P; 2366 } 2367 2368 os_memset(&msg, 0, sizeof(msg)); 2369 if (p2p_parse_ies(ie, ie_len, &msg) < 0) { 2370 /* Could not parse P2P attributes */ 2371 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it"); 2372 return P2P_PREQ_NOT_P2P; 2373 } 2374 2375 if (msg.service_hash && msg.service_hash_count) { 2376 const u8 *hash = msg.service_hash; 2377 u8 i; 2378 int p2ps_svc_found = 0; 2379 2380 p2p_dbg(p2p, "in_listen=%d drv_in_listen=%d when received P2PS Probe Request at %u MHz; own Listen channel %u, pending listen freq %u MHz", 2381 p2p->in_listen, p2p->drv_in_listen, rx_freq, 2382 p2p->cfg->channel, p2p->pending_listen_freq); 2383 2384 if (!p2p->in_listen && !p2p->drv_in_listen && 2385 p2p->pending_listen_freq && rx_freq && 2386 rx_freq != p2p->pending_listen_freq) { 2387 p2p_dbg(p2p, "Do not reply to Probe Request frame that was received on %u MHz while waiting to start Listen state on %u MHz", 2388 rx_freq, p2p->pending_listen_freq); 2389 p2p_parse_free(&msg); 2390 return P2P_PREQ_NOT_LISTEN; 2391 } 2392 2393 for (i = 0; i < msg.service_hash_count; i++) { 2394 if (p2p_service_find_asp(p2p, hash)) { 2395 p2p_dbg(p2p, "Service Hash match found: " 2396 MACSTR, MAC2STR(hash)); 2397 p2ps_svc_found = 1; 2398 break; 2399 } 2400 hash += P2PS_HASH_LEN; 2401 } 2402 2403 /* Probed hash unknown */ 2404 if (!p2ps_svc_found) { 2405 p2p_dbg(p2p, "No Service Hash match found"); 2406 p2p_parse_free(&msg); 2407 return P2P_PREQ_NOT_PROCESSED; 2408 } 2409 } else { 2410 /* This is not a P2PS Probe Request */ 2411 p2p_dbg(p2p, "No P2PS Hash in Probe Request"); 2412 2413 if (!p2p->in_listen || !p2p->drv_in_listen) { 2414 /* not in Listen state - ignore Probe Request */ 2415 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request", 2416 p2p->in_listen, p2p->drv_in_listen); 2417 p2p_parse_free(&msg); 2418 return P2P_PREQ_NOT_LISTEN; 2419 } 2420 } 2421 2422 if (msg.device_id && 2423 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2424 /* Device ID did not match */ 2425 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it", 2426 MAC2STR(msg.device_id)); 2427 p2p_parse_free(&msg); 2428 return P2P_PREQ_NOT_PROCESSED; 2429 } 2430 2431 /* Check Requested Device Type match */ 2432 if (msg.wps_attributes && 2433 !p2p_match_dev_type(p2p, msg.wps_attributes)) { 2434 /* No match with Requested Device Type */ 2435 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it"); 2436 p2p_parse_free(&msg); 2437 return P2P_PREQ_NOT_PROCESSED; 2438 } 2439 2440 if (!p2p->cfg->send_probe_resp) { 2441 /* Response generated elsewhere */ 2442 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response"); 2443 p2p_parse_free(&msg); 2444 return P2P_PREQ_NOT_PROCESSED; 2445 } 2446 2447 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state"); 2448 2449 /* 2450 * We do not really have a specific BSS that this frame is advertising, 2451 * so build a frame that has some information in valid format. This is 2452 * really only used for discovery purposes, not to learn exact BSS 2453 * parameters. 2454 */ 2455 ies = p2p_build_probe_resp_ies(p2p, msg.service_hash, 2456 msg.service_hash_count); 2457 p2p_parse_free(&msg); 2458 if (ies == NULL) 2459 return P2P_PREQ_NOT_PROCESSED; 2460 2461 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 2462 if (buf == NULL) { 2463 wpabuf_free(ies); 2464 return P2P_PREQ_NOT_PROCESSED; 2465 } 2466 2467 if (p2p_build_probe_resp_buf(p2p, buf, ies, addr, rx_freq)) { 2468 wpabuf_free(ies); 2469 wpabuf_free(buf); 2470 return P2P_PREQ_NOT_PROCESSED; 2471 } 2472 2473 wpabuf_free(ies); 2474 2475 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf, rx_freq); 2476 2477 wpabuf_free(buf); 2478 2479 return P2P_PREQ_PROCESSED; 2480 } 2481 2482 2483 enum p2p_probe_req_status 2484 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2485 const u8 *bssid, const u8 *ie, size_t ie_len, 2486 unsigned int rx_freq, int p2p_lo_started) 2487 { 2488 enum p2p_probe_req_status res; 2489 2490 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len); 2491 2492 if (p2p_lo_started) { 2493 p2p_dbg(p2p, 2494 "Probe Response is offloaded, do not reply Probe Request"); 2495 return P2P_PREQ_PROCESSED; 2496 } 2497 2498 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len, rx_freq); 2499 if (res != P2P_PREQ_PROCESSED && res != P2P_PREQ_NOT_PROCESSED) 2500 return res; 2501 2502 /* 2503 * Activate a pending GO Negotiation/Invite flow if a received Probe 2504 * Request frame is from an expected peer. Some devices may share the 2505 * same address for P2P and non-P2P STA running simultaneously. The 2506 * P2P_PREQ_PROCESSED and P2P_PREQ_NOT_PROCESSED p2p_reply_probe() 2507 * return values verified above ensure we are handling a Probe Request 2508 * frame from a P2P peer. 2509 */ 2510 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) && 2511 p2p->go_neg_peer && 2512 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN) 2513 == 0 && 2514 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 2515 /* Received a Probe Request from GO Negotiation peer */ 2516 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout"); 2517 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2518 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL); 2519 return res; 2520 } 2521 2522 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) && 2523 p2p->invite_peer && 2524 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) && 2525 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN) 2526 == 0) { 2527 /* Received a Probe Request from Invite peer */ 2528 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout"); 2529 eloop_cancel_timeout(p2p_invite_start, p2p, NULL); 2530 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL); 2531 return res; 2532 } 2533 2534 return res; 2535 } 2536 2537 2538 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid, 2539 u8 *buf, size_t len, struct wpabuf *p2p_ie) 2540 { 2541 struct wpabuf *tmp; 2542 u8 *lpos; 2543 size_t tmplen; 2544 int res; 2545 u8 group_capab; 2546 struct p2p_message msg; 2547 2548 if (p2p_ie == NULL) 2549 return 0; /* WLAN AP is not a P2P manager */ 2550 2551 os_memset(&msg, 0, sizeof(msg)); 2552 if (p2p_parse_p2p_ie(p2p_ie, &msg) < 0) 2553 return 0; 2554 2555 p2p_dbg(p2p, "BSS P2P manageability %s", 2556 msg.manageability ? "enabled" : "disabled"); 2557 2558 if (!msg.manageability) 2559 return 0; 2560 2561 /* 2562 * (Re)Association Request - P2P IE 2563 * P2P Capability attribute (shall be present) 2564 * P2P Interface attribute (present if concurrent device and 2565 * P2P Management is enabled) 2566 */ 2567 tmp = wpabuf_alloc(200); 2568 if (tmp == NULL) 2569 return -1; 2570 2571 lpos = p2p_buf_add_ie_hdr(tmp); 2572 group_capab = 0; 2573 if (p2p->num_groups > 0) { 2574 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; 2575 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2576 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) && 2577 p2p->cross_connect) 2578 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 2579 } 2580 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab); 2581 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2582 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED)) 2583 p2p_buf_add_p2p_interface(tmp, p2p); 2584 p2p_buf_update_ie_hdr(tmp, lpos); 2585 2586 tmplen = wpabuf_len(tmp); 2587 if (tmplen > len) 2588 res = -1; 2589 else { 2590 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2591 res = tmplen; 2592 } 2593 wpabuf_free(tmp); 2594 2595 return res; 2596 } 2597 2598 2599 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf, 2600 size_t len, int p2p_group, struct wpabuf *p2p_ie) 2601 { 2602 struct wpabuf *tmp; 2603 u8 *lpos; 2604 struct p2p_device *peer; 2605 size_t tmplen; 2606 int res; 2607 size_t extra = 0; 2608 2609 if (!p2p_group) 2610 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie); 2611 2612 #ifdef CONFIG_WIFI_DISPLAY 2613 if (p2p->wfd_ie_assoc_req) 2614 extra = wpabuf_len(p2p->wfd_ie_assoc_req); 2615 #endif /* CONFIG_WIFI_DISPLAY */ 2616 2617 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]) 2618 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]); 2619 2620 /* 2621 * (Re)Association Request - P2P IE 2622 * P2P Capability attribute (shall be present) 2623 * Extended Listen Timing (may be present) 2624 * P2P Device Info attribute (shall be present) 2625 */ 2626 tmp = wpabuf_alloc(200 + extra); 2627 if (tmp == NULL) 2628 return -1; 2629 2630 #ifdef CONFIG_WIFI_DISPLAY 2631 if (p2p->wfd_ie_assoc_req) 2632 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req); 2633 #endif /* CONFIG_WIFI_DISPLAY */ 2634 2635 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]) 2636 wpabuf_put_buf(tmp, 2637 p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]); 2638 2639 peer = bssid ? p2p_get_device(p2p, bssid) : NULL; 2640 2641 lpos = p2p_buf_add_ie_hdr(tmp); 2642 p2p_buf_add_capability(tmp, p2p->dev_capab, 0); 2643 if (p2p->ext_listen_interval) 2644 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period, 2645 p2p->ext_listen_interval); 2646 p2p_buf_add_device_info(tmp, p2p, peer); 2647 p2p_buf_update_ie_hdr(tmp, lpos); 2648 2649 tmplen = wpabuf_len(tmp); 2650 if (tmplen > len) 2651 res = -1; 2652 else { 2653 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2654 res = tmplen; 2655 } 2656 wpabuf_free(tmp); 2657 2658 return res; 2659 } 2660 2661 2662 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) 2663 { 2664 struct wpabuf *p2p_ie; 2665 int ret; 2666 2667 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); 2668 if (p2p_ie == NULL) 2669 return 0; 2670 2671 ret = p2p_attr_text(p2p_ie, buf, end); 2672 wpabuf_free(p2p_ie); 2673 return ret; 2674 } 2675 2676 2677 struct p2ps_advertisement * 2678 p2p_service_p2ps_id(struct p2p_data *p2p, u32 adv_id) 2679 { 2680 struct p2ps_advertisement *adv_data; 2681 2682 if (!p2p) 2683 return NULL; 2684 2685 adv_data = p2p->p2ps_adv_list; 2686 while (adv_data) { 2687 if (adv_data->id == adv_id) 2688 return adv_data; 2689 adv_data = adv_data->next; 2690 } 2691 2692 return NULL; 2693 } 2694 2695 2696 int p2p_service_del_asp(struct p2p_data *p2p, u32 adv_id) 2697 { 2698 struct p2ps_advertisement *adv_data; 2699 struct p2ps_advertisement **prior; 2700 2701 if (!p2p) 2702 return -1; 2703 2704 adv_data = p2p->p2ps_adv_list; 2705 prior = &p2p->p2ps_adv_list; 2706 while (adv_data) { 2707 if (adv_data->id == adv_id) { 2708 p2p_dbg(p2p, "Delete ASP adv_id=0x%x", adv_id); 2709 *prior = adv_data->next; 2710 os_free(adv_data); 2711 return 0; 2712 } 2713 prior = &adv_data->next; 2714 adv_data = adv_data->next; 2715 } 2716 2717 return -1; 2718 } 2719 2720 2721 int p2p_service_add_asp(struct p2p_data *p2p, int auto_accept, u32 adv_id, 2722 const char *adv_str, u8 svc_state, u16 config_methods, 2723 const char *svc_info, const u8 *cpt_priority) 2724 { 2725 struct p2ps_advertisement *adv_data, *tmp, **prev; 2726 u8 buf[P2PS_HASH_LEN]; 2727 size_t adv_data_len, adv_len, info_len = 0; 2728 int i; 2729 2730 if (!p2p || !adv_str || !adv_str[0] || !cpt_priority) 2731 return -1; 2732 2733 if (!(config_methods & p2p->cfg->config_methods)) { 2734 p2p_dbg(p2p, "Config methods not supported svc: 0x%x dev: 0x%x", 2735 config_methods, p2p->cfg->config_methods); 2736 return -1; 2737 } 2738 2739 if (!p2ps_gen_hash(p2p, adv_str, buf)) 2740 return -1; 2741 2742 if (svc_info) 2743 info_len = os_strlen(svc_info); 2744 adv_len = os_strlen(adv_str); 2745 adv_data_len = sizeof(struct p2ps_advertisement) + adv_len + 1 + 2746 info_len + 1; 2747 2748 adv_data = os_zalloc(adv_data_len); 2749 if (!adv_data) 2750 return -1; 2751 2752 os_memcpy(adv_data->hash, buf, P2PS_HASH_LEN); 2753 adv_data->id = adv_id; 2754 adv_data->state = svc_state; 2755 adv_data->config_methods = config_methods & p2p->cfg->config_methods; 2756 adv_data->auto_accept = (u8) auto_accept; 2757 os_memcpy(adv_data->svc_name, adv_str, adv_len); 2758 2759 for (i = 0; cpt_priority[i] && i < P2PS_FEATURE_CAPAB_CPT_MAX; i++) { 2760 adv_data->cpt_priority[i] = cpt_priority[i]; 2761 adv_data->cpt_mask |= cpt_priority[i]; 2762 } 2763 2764 if (svc_info && info_len) { 2765 adv_data->svc_info = &adv_data->svc_name[adv_len + 1]; 2766 os_memcpy(adv_data->svc_info, svc_info, info_len); 2767 } 2768 2769 /* 2770 * Group Advertisements by service string. They do not need to be 2771 * sorted, but groups allow easier Probe Response instance grouping 2772 */ 2773 tmp = p2p->p2ps_adv_list; 2774 prev = &p2p->p2ps_adv_list; 2775 while (tmp) { 2776 if (tmp->id == adv_data->id) { 2777 if (os_strcmp(tmp->svc_name, adv_data->svc_name) != 0) { 2778 os_free(adv_data); 2779 return -1; 2780 } 2781 adv_data->next = tmp->next; 2782 *prev = adv_data; 2783 os_free(tmp); 2784 goto inserted; 2785 } else { 2786 if (os_strcmp(tmp->svc_name, adv_data->svc_name) == 0) { 2787 adv_data->next = tmp->next; 2788 tmp->next = adv_data; 2789 goto inserted; 2790 } 2791 } 2792 prev = &tmp->next; 2793 tmp = tmp->next; 2794 } 2795 2796 /* No svc_name match found */ 2797 adv_data->next = p2p->p2ps_adv_list; 2798 p2p->p2ps_adv_list = adv_data; 2799 2800 inserted: 2801 p2p_dbg(p2p, 2802 "Added ASP advertisement adv_id=0x%x config_methods=0x%x svc_state=0x%x adv_str='%s' cpt_mask=0x%x", 2803 adv_id, adv_data->config_methods, svc_state, adv_str, 2804 adv_data->cpt_mask); 2805 2806 return 0; 2807 } 2808 2809 2810 void p2p_service_flush_asp(struct p2p_data *p2p) 2811 { 2812 struct p2ps_advertisement *adv, *prev; 2813 2814 if (!p2p) 2815 return; 2816 2817 adv = p2p->p2ps_adv_list; 2818 while (adv) { 2819 prev = adv; 2820 adv = adv->next; 2821 os_free(prev); 2822 } 2823 2824 p2p->p2ps_adv_list = NULL; 2825 p2p_dbg(p2p, "All ASP advertisements flushed"); 2826 } 2827 2828 2829 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr) 2830 { 2831 struct p2p_message msg; 2832 2833 os_memset(&msg, 0, sizeof(msg)); 2834 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 2835 return -1; 2836 2837 if (msg.p2p_device_addr) { 2838 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); 2839 return 0; 2840 } else if (msg.device_id) { 2841 os_memcpy(dev_addr, msg.device_id, ETH_ALEN); 2842 return 0; 2843 } 2844 return -1; 2845 } 2846 2847 2848 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr) 2849 { 2850 struct wpabuf *p2p_ie; 2851 int ret; 2852 2853 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 2854 P2P_IE_VENDOR_TYPE); 2855 if (p2p_ie == NULL) 2856 return -1; 2857 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr); 2858 wpabuf_free(p2p_ie); 2859 return ret; 2860 } 2861 2862 2863 static void p2p_clear_go_neg(struct p2p_data *p2p) 2864 { 2865 p2p->go_neg_peer = NULL; 2866 p2p_clear_timeout(p2p); 2867 p2p_set_state(p2p, P2P_IDLE); 2868 } 2869 2870 2871 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr) 2872 { 2873 if (p2p->go_neg_peer == NULL) { 2874 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification"); 2875 return; /* No pending Group Formation */ 2876 } 2877 2878 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) != 2879 0) { 2880 p2p_dbg(p2p, "Ignore WPS registration success notification for " 2881 MACSTR " (GO Negotiation peer " MACSTR ")", 2882 MAC2STR(mac_addr), 2883 MAC2STR(p2p->go_neg_peer->intended_addr)); 2884 return; /* Ignore unexpected peer address */ 2885 } 2886 2887 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR, 2888 MAC2STR(mac_addr)); 2889 2890 p2p_clear_go_neg(p2p); 2891 } 2892 2893 2894 void p2p_group_formation_failed(struct p2p_data *p2p) 2895 { 2896 if (p2p->go_neg_peer == NULL) { 2897 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification"); 2898 return; /* No pending Group Formation */ 2899 } 2900 2901 p2p_dbg(p2p, "Group Formation failed with " MACSTR, 2902 MAC2STR(p2p->go_neg_peer->intended_addr)); 2903 2904 p2p_clear_go_neg(p2p); 2905 } 2906 2907 2908 struct p2p_data * p2p_init(const struct p2p_config *cfg) 2909 { 2910 struct p2p_data *p2p; 2911 2912 if (cfg->max_peers < 1 || 2913 cfg->passphrase_len < 8 || cfg->passphrase_len > 63) 2914 return NULL; 2915 2916 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg)); 2917 if (p2p == NULL) 2918 return NULL; 2919 p2p->cfg = (struct p2p_config *) (p2p + 1); 2920 os_memcpy(p2p->cfg, cfg, sizeof(*cfg)); 2921 if (cfg->dev_name) 2922 p2p->cfg->dev_name = os_strdup(cfg->dev_name); 2923 if (cfg->manufacturer) 2924 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer); 2925 if (cfg->model_name) 2926 p2p->cfg->model_name = os_strdup(cfg->model_name); 2927 if (cfg->model_number) 2928 p2p->cfg->model_number = os_strdup(cfg->model_number); 2929 if (cfg->serial_number) 2930 p2p->cfg->serial_number = os_strdup(cfg->serial_number); 2931 if (cfg->pref_chan) { 2932 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan * 2933 sizeof(struct p2p_channel)); 2934 if (p2p->cfg->pref_chan) { 2935 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan, 2936 cfg->num_pref_chan * 2937 sizeof(struct p2p_channel)); 2938 } else 2939 p2p->cfg->num_pref_chan = 0; 2940 } 2941 2942 p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash); 2943 2944 p2p->min_disc_int = 1; 2945 p2p->max_disc_int = 3; 2946 p2p->max_disc_tu = -1; 2947 2948 if (os_get_random(&p2p->next_tie_breaker, 1) < 0) 2949 p2p->next_tie_breaker = 0; 2950 p2p->next_tie_breaker &= 0x01; 2951 if (cfg->sd_request) 2952 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 2953 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE; 2954 if (cfg->concurrent_operations) 2955 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER; 2956 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 2957 2958 dl_list_init(&p2p->devices); 2959 2960 p2p->go_timeout = 100; 2961 p2p->client_timeout = 20; 2962 p2p->num_p2p_sd_queries = 0; 2963 2964 p2p_dbg(p2p, "initialized"); 2965 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 2966 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 2967 2968 return p2p; 2969 } 2970 2971 2972 void p2p_deinit(struct p2p_data *p2p) 2973 { 2974 #ifdef CONFIG_WIFI_DISPLAY 2975 wpabuf_free(p2p->wfd_ie_beacon); 2976 wpabuf_free(p2p->wfd_ie_probe_req); 2977 wpabuf_free(p2p->wfd_ie_probe_resp); 2978 wpabuf_free(p2p->wfd_ie_assoc_req); 2979 wpabuf_free(p2p->wfd_ie_invitation); 2980 wpabuf_free(p2p->wfd_ie_prov_disc_req); 2981 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 2982 wpabuf_free(p2p->wfd_ie_go_neg); 2983 wpabuf_free(p2p->wfd_dev_info); 2984 wpabuf_free(p2p->wfd_assoc_bssid); 2985 wpabuf_free(p2p->wfd_coupled_sink_info); 2986 #endif /* CONFIG_WIFI_DISPLAY */ 2987 2988 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2989 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2990 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL); 2991 p2p_flush(p2p); 2992 p2p_free_req_dev_types(p2p); 2993 os_free(p2p->cfg->dev_name); 2994 os_free(p2p->cfg->manufacturer); 2995 os_free(p2p->cfg->model_name); 2996 os_free(p2p->cfg->model_number); 2997 os_free(p2p->cfg->serial_number); 2998 os_free(p2p->cfg->pref_chan); 2999 os_free(p2p->groups); 3000 p2ps_prov_free(p2p); 3001 wpabuf_free(p2p->sd_resp); 3002 p2p_remove_wps_vendor_extensions(p2p); 3003 os_free(p2p->no_go_freq.range); 3004 p2p_service_flush_asp(p2p); 3005 3006 os_free(p2p); 3007 } 3008 3009 3010 void p2p_flush(struct p2p_data *p2p) 3011 { 3012 struct p2p_device *dev, *prev; 3013 3014 p2p_ext_listen(p2p, 0, 0); 3015 p2p_stop_find(p2p); 3016 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device, 3017 list) { 3018 dl_list_del(&dev->list); 3019 p2p_device_free(p2p, dev); 3020 } 3021 p2p_free_sd_queries(p2p); 3022 os_free(p2p->after_scan_tx); 3023 p2p->after_scan_tx = NULL; 3024 p2p->ssid_set = 0; 3025 } 3026 3027 3028 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr) 3029 { 3030 struct p2p_device *dev; 3031 3032 dev = p2p_get_device(p2p, addr); 3033 if (dev == NULL) 3034 return -1; 3035 3036 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr)); 3037 3038 if (p2p->go_neg_peer == dev) { 3039 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL); 3040 p2p->go_neg_peer = NULL; 3041 } 3042 3043 dev->wps_method = WPS_NOT_READY; 3044 dev->oob_pw_id = 0; 3045 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 3046 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 3047 3048 /* Check if after_scan_tx is for this peer. If so free it */ 3049 if (p2p->after_scan_tx && 3050 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) { 3051 os_free(p2p->after_scan_tx); 3052 p2p->after_scan_tx = NULL; 3053 } 3054 3055 return 0; 3056 } 3057 3058 3059 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name) 3060 { 3061 os_free(p2p->cfg->dev_name); 3062 if (dev_name) { 3063 p2p->cfg->dev_name = os_strdup(dev_name); 3064 if (p2p->cfg->dev_name == NULL) 3065 return -1; 3066 } else 3067 p2p->cfg->dev_name = NULL; 3068 return 0; 3069 } 3070 3071 3072 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer) 3073 { 3074 os_free(p2p->cfg->manufacturer); 3075 p2p->cfg->manufacturer = NULL; 3076 if (manufacturer) { 3077 p2p->cfg->manufacturer = os_strdup(manufacturer); 3078 if (p2p->cfg->manufacturer == NULL) 3079 return -1; 3080 } 3081 3082 return 0; 3083 } 3084 3085 3086 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name) 3087 { 3088 os_free(p2p->cfg->model_name); 3089 p2p->cfg->model_name = NULL; 3090 if (model_name) { 3091 p2p->cfg->model_name = os_strdup(model_name); 3092 if (p2p->cfg->model_name == NULL) 3093 return -1; 3094 } 3095 3096 return 0; 3097 } 3098 3099 3100 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number) 3101 { 3102 os_free(p2p->cfg->model_number); 3103 p2p->cfg->model_number = NULL; 3104 if (model_number) { 3105 p2p->cfg->model_number = os_strdup(model_number); 3106 if (p2p->cfg->model_number == NULL) 3107 return -1; 3108 } 3109 3110 return 0; 3111 } 3112 3113 3114 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number) 3115 { 3116 os_free(p2p->cfg->serial_number); 3117 p2p->cfg->serial_number = NULL; 3118 if (serial_number) { 3119 p2p->cfg->serial_number = os_strdup(serial_number); 3120 if (p2p->cfg->serial_number == NULL) 3121 return -1; 3122 } 3123 3124 return 0; 3125 } 3126 3127 3128 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods) 3129 { 3130 p2p->cfg->config_methods = config_methods; 3131 } 3132 3133 3134 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid) 3135 { 3136 os_memcpy(p2p->cfg->uuid, uuid, 16); 3137 } 3138 3139 3140 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type) 3141 { 3142 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8); 3143 return 0; 3144 } 3145 3146 3147 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8], 3148 size_t num_dev_types) 3149 { 3150 if (num_dev_types > P2P_SEC_DEVICE_TYPES) 3151 num_dev_types = P2P_SEC_DEVICE_TYPES; 3152 p2p->cfg->num_sec_dev_types = num_dev_types; 3153 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8); 3154 return 0; 3155 } 3156 3157 3158 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p) 3159 { 3160 int i; 3161 3162 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 3163 wpabuf_free(p2p->wps_vendor_ext[i]); 3164 p2p->wps_vendor_ext[i] = NULL; 3165 } 3166 } 3167 3168 3169 int p2p_add_wps_vendor_extension(struct p2p_data *p2p, 3170 const struct wpabuf *vendor_ext) 3171 { 3172 int i; 3173 3174 if (vendor_ext == NULL) 3175 return -1; 3176 3177 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 3178 if (p2p->wps_vendor_ext[i] == NULL) 3179 break; 3180 } 3181 if (i >= P2P_MAX_WPS_VENDOR_EXT) 3182 return -1; 3183 3184 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext); 3185 if (p2p->wps_vendor_ext[i] == NULL) 3186 return -1; 3187 3188 return 0; 3189 } 3190 3191 3192 int p2p_set_country(struct p2p_data *p2p, const char *country) 3193 { 3194 os_memcpy(p2p->cfg->country, country, 3); 3195 return 0; 3196 } 3197 3198 3199 static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev) 3200 { 3201 int res; 3202 3203 if (dev->sd_pending_bcast_queries == 0) { 3204 /* Initialize with total number of registered broadcast 3205 * SD queries. */ 3206 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries; 3207 } 3208 3209 res = p2p_start_sd(p2p, dev); 3210 if (res == -2) 3211 return -2; 3212 if (res == 0) 3213 return 1; 3214 3215 if (dev->req_config_methods && 3216 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) { 3217 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 3218 MACSTR " (config methods 0x%x)", 3219 MAC2STR(dev->info.p2p_device_addr), 3220 dev->req_config_methods); 3221 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0) 3222 return 1; 3223 } 3224 3225 return 0; 3226 } 3227 3228 3229 void p2p_continue_find(struct p2p_data *p2p) 3230 { 3231 struct p2p_device *dev; 3232 int found, res; 3233 3234 p2p_set_state(p2p, P2P_SEARCH); 3235 3236 /* Continue from the device following the last iteration */ 3237 found = 0; 3238 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3239 if (dev == p2p->last_p2p_find_oper) { 3240 found = 1; 3241 continue; 3242 } 3243 if (!found) 3244 continue; 3245 res = p2p_pre_find_operation(p2p, dev); 3246 if (res > 0) { 3247 p2p->last_p2p_find_oper = dev; 3248 return; 3249 } 3250 if (res == -2) 3251 goto skip_sd; 3252 } 3253 3254 /* 3255 * Wrap around to the beginning of the list and continue until the last 3256 * iteration device. 3257 */ 3258 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3259 res = p2p_pre_find_operation(p2p, dev); 3260 if (res > 0) { 3261 p2p->last_p2p_find_oper = dev; 3262 return; 3263 } 3264 if (res == -2) 3265 goto skip_sd; 3266 if (dev == p2p->last_p2p_find_oper) 3267 break; 3268 } 3269 3270 skip_sd: 3271 os_memset(p2p->sd_query_no_ack, 0, ETH_ALEN); 3272 p2p_listen_in_find(p2p, 1); 3273 } 3274 3275 3276 static void p2p_sd_cb(struct p2p_data *p2p, int success) 3277 { 3278 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d", 3279 success); 3280 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3281 3282 if (!success) { 3283 if (p2p->sd_peer) { 3284 if (is_zero_ether_addr(p2p->sd_query_no_ack)) { 3285 os_memcpy(p2p->sd_query_no_ack, 3286 p2p->sd_peer->info.p2p_device_addr, 3287 ETH_ALEN); 3288 p2p_dbg(p2p, 3289 "First SD Query no-ACK in this search iteration: " 3290 MACSTR, MAC2STR(p2p->sd_query_no_ack)); 3291 } 3292 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3293 } 3294 p2p->sd_peer = NULL; 3295 if (p2p->state != P2P_IDLE) 3296 p2p_continue_find(p2p); 3297 return; 3298 } 3299 3300 if (p2p->sd_peer == NULL) { 3301 p2p_dbg(p2p, "No SD peer entry known"); 3302 if (p2p->state != P2P_IDLE) 3303 p2p_continue_find(p2p); 3304 return; 3305 } 3306 3307 if (p2p->sd_query && p2p->sd_query->for_all_peers) { 3308 /* Update the pending broadcast SD query count for this device 3309 */ 3310 p2p->sd_peer->sd_pending_bcast_queries--; 3311 3312 /* 3313 * If there are no pending broadcast queries for this device, 3314 * mark it as done (-1). 3315 */ 3316 if (p2p->sd_peer->sd_pending_bcast_queries == 0) 3317 p2p->sd_peer->sd_pending_bcast_queries = -1; 3318 } 3319 3320 /* Wait for response from the peer */ 3321 p2p_set_state(p2p, P2P_SD_DURING_FIND); 3322 p2p_set_timeout(p2p, 0, 200000); 3323 } 3324 3325 3326 /** 3327 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state 3328 * @p2p: P2P module context from p2p_init() 3329 */ 3330 static void p2p_retry_pd(struct p2p_data *p2p) 3331 { 3332 struct p2p_device *dev; 3333 3334 /* 3335 * Retry the prov disc req attempt only for the peer that the user had 3336 * requested. 3337 */ 3338 3339 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3340 if (os_memcmp(p2p->pending_pd_devaddr, 3341 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3342 continue; 3343 if (!dev->req_config_methods) 3344 continue; 3345 3346 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 3347 MACSTR " (config methods 0x%x)", 3348 MAC2STR(dev->info.p2p_device_addr), 3349 dev->req_config_methods); 3350 p2p_send_prov_disc_req(p2p, dev, 3351 dev->flags & P2P_DEV_PD_FOR_JOIN, 3352 p2p->pd_force_freq); 3353 return; 3354 } 3355 } 3356 3357 3358 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success) 3359 { 3360 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d", 3361 success); 3362 3363 /* 3364 * Postpone resetting the pending action state till after we actually 3365 * time out. This allows us to take some action like notifying any 3366 * interested parties about no response to the request. 3367 * 3368 * When the timer (below) goes off we check in IDLE, SEARCH, or 3369 * LISTEN_ONLY state, which are the only allowed states to issue a PD 3370 * requests in, if this was still pending and then raise notification. 3371 */ 3372 3373 if (!success) { 3374 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3375 3376 if (p2p->user_initiated_pd && 3377 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY)) 3378 { 3379 /* Retry request from timeout to avoid busy loops */ 3380 p2p->pending_action_state = P2P_PENDING_PD; 3381 p2p_set_timeout(p2p, 0, 50000); 3382 } else if (p2p->state != P2P_IDLE) 3383 p2p_continue_find(p2p); 3384 else if (p2p->user_initiated_pd) { 3385 p2p->pending_action_state = P2P_PENDING_PD; 3386 p2p_set_timeout(p2p, 0, 300000); 3387 } 3388 return; 3389 } 3390 3391 /* 3392 * If after PD Request the peer doesn't expect to receive PD Response 3393 * the PD Request ACK indicates a completion of the current PD. This 3394 * happens only on the advertiser side sending the follow-on PD Request 3395 * with the status different than 12 (Success: accepted by user). 3396 */ 3397 if (p2p->p2ps_prov && !p2p->p2ps_prov->pd_seeker && 3398 p2p->p2ps_prov->status != P2P_SC_SUCCESS_DEFERRED) { 3399 p2p_dbg(p2p, "P2PS PD completion on Follow-on PD Request ACK"); 3400 3401 if (p2p->send_action_in_progress) { 3402 p2p->send_action_in_progress = 0; 3403 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3404 } 3405 3406 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3407 3408 if (p2p->cfg->p2ps_prov_complete) { 3409 p2p->cfg->p2ps_prov_complete( 3410 p2p->cfg->cb_ctx, 3411 p2p->p2ps_prov->status, 3412 p2p->p2ps_prov->adv_mac, 3413 p2p->p2ps_prov->adv_mac, 3414 p2p->p2ps_prov->session_mac, 3415 NULL, p2p->p2ps_prov->adv_id, 3416 p2p->p2ps_prov->session_id, 3417 0, 0, NULL, 0, 0, 0, 3418 NULL, NULL, 0, 0, NULL, 0); 3419 } 3420 3421 if (p2p->user_initiated_pd) 3422 p2p_reset_pending_pd(p2p); 3423 3424 p2ps_prov_free(p2p); 3425 return; 3426 } 3427 3428 /* 3429 * This postponing, of resetting pending_action_state, needs to be 3430 * done only for user initiated PD requests and not internal ones. 3431 */ 3432 if (p2p->user_initiated_pd) 3433 p2p->pending_action_state = P2P_PENDING_PD; 3434 else 3435 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3436 3437 /* Wait for response from the peer */ 3438 if (p2p->state == P2P_SEARCH) 3439 p2p_set_state(p2p, P2P_PD_DURING_FIND); 3440 p2p_set_timeout(p2p, 0, 200000); 3441 } 3442 3443 3444 static int p2p_check_after_scan_tx_continuation(struct p2p_data *p2p) 3445 { 3446 if (p2p->after_scan_tx_in_progress) { 3447 p2p->after_scan_tx_in_progress = 0; 3448 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING && 3449 p2p_run_after_scan(p2p)) 3450 return 1; 3451 if (p2p->state == P2P_SEARCH) { 3452 p2p_dbg(p2p, "Continue find after after_scan_tx completion"); 3453 p2p_continue_find(p2p); 3454 } 3455 } 3456 3457 return 0; 3458 } 3459 3460 3461 static void p2p_prov_disc_resp_cb(struct p2p_data *p2p, int success) 3462 { 3463 p2p_dbg(p2p, "Provision Discovery Response TX callback: success=%d", 3464 success); 3465 3466 if (p2p->send_action_in_progress) { 3467 p2p->send_action_in_progress = 0; 3468 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3469 } 3470 3471 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3472 3473 if (!success) 3474 goto continue_search; 3475 3476 if (!p2p->cfg->prov_disc_resp_cb || 3477 p2p->cfg->prov_disc_resp_cb(p2p->cfg->cb_ctx) < 1) 3478 goto continue_search; 3479 3480 p2p_dbg(p2p, 3481 "Post-Provision Discovery operations started - do not try to continue other P2P operations"); 3482 return; 3483 3484 continue_search: 3485 p2p_check_after_scan_tx_continuation(p2p); 3486 } 3487 3488 3489 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq, 3490 struct os_reltime *rx_time, int level, const u8 *ies, 3491 size_t ies_len) 3492 { 3493 if (os_reltime_before(rx_time, &p2p->find_start)) { 3494 /* 3495 * The driver may have cached (e.g., in cfg80211 BSS table) the 3496 * scan results for relatively long time. To avoid reporting 3497 * stale information, update P2P peers only based on results 3498 * that have based on frames received after the last p2p_find 3499 * operation was started. 3500 */ 3501 p2p_dbg(p2p, "Ignore old scan result for " MACSTR 3502 " (rx_time=%u.%06u find_start=%u.%06u)", 3503 MAC2STR(bssid), (unsigned int) rx_time->sec, 3504 (unsigned int) rx_time->usec, 3505 (unsigned int) p2p->find_start.sec, 3506 (unsigned int) p2p->find_start.usec); 3507 return 0; 3508 } 3509 3510 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1); 3511 3512 return 0; 3513 } 3514 3515 3516 void p2p_scan_res_handled(struct p2p_data *p2p) 3517 { 3518 if (!p2p->p2p_scan_running) { 3519 p2p_dbg(p2p, "p2p_scan was not running, but scan results received"); 3520 } 3521 p2p->p2p_scan_running = 0; 3522 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 3523 3524 if (p2p_run_after_scan(p2p)) 3525 return; 3526 if (p2p->state == P2P_SEARCH) 3527 p2p_continue_find(p2p); 3528 } 3529 3530 3531 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id, 3532 unsigned int bands) 3533 { 3534 u8 dev_capab; 3535 u8 *len; 3536 3537 #ifdef CONFIG_WIFI_DISPLAY 3538 if (p2p->wfd_ie_probe_req) 3539 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req); 3540 #endif /* CONFIG_WIFI_DISPLAY */ 3541 3542 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]) 3543 wpabuf_put_buf(ies, 3544 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]); 3545 3546 len = p2p_buf_add_ie_hdr(ies); 3547 3548 dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3549 3550 /* P2PS requires Probe Request frames to include SD bit */ 3551 if (p2p->p2ps_seek && p2p->p2ps_seek_count) 3552 dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 3553 3554 p2p_buf_add_capability(ies, dev_capab, 0); 3555 3556 if (dev_id) 3557 p2p_buf_add_device_id(ies, dev_id); 3558 if (p2p->cfg->reg_class && p2p->cfg->channel) 3559 p2p_buf_add_listen_channel(ies, p2p->cfg->country, 3560 p2p->cfg->reg_class, 3561 p2p->cfg->channel); 3562 if (p2p->ext_listen_interval) 3563 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period, 3564 p2p->ext_listen_interval); 3565 3566 if (bands & BAND_60_GHZ) 3567 p2p_buf_add_device_info(ies, p2p, NULL); 3568 3569 if (p2p->p2ps_seek && p2p->p2ps_seek_count) 3570 p2p_buf_add_service_hash(ies, p2p); 3571 3572 /* TODO: p2p_buf_add_operating_channel() if GO */ 3573 p2p_buf_update_ie_hdr(ies, len); 3574 } 3575 3576 3577 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p) 3578 { 3579 size_t len = 100; 3580 3581 #ifdef CONFIG_WIFI_DISPLAY 3582 if (p2p && p2p->wfd_ie_probe_req) 3583 len += wpabuf_len(p2p->wfd_ie_probe_req); 3584 #endif /* CONFIG_WIFI_DISPLAY */ 3585 3586 if (p2p && p2p->vendor_elem && 3587 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]) 3588 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]); 3589 3590 return len; 3591 } 3592 3593 3594 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end) 3595 { 3596 return p2p_attr_text(p2p_ie, buf, end); 3597 } 3598 3599 3600 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success) 3601 { 3602 struct p2p_device *dev = p2p->go_neg_peer; 3603 int timeout; 3604 3605 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success); 3606 3607 if (dev == NULL) { 3608 p2p_dbg(p2p, "No pending GO Negotiation"); 3609 return; 3610 } 3611 3612 if (success) { 3613 if (dev->flags & P2P_DEV_USER_REJECTED) { 3614 p2p_set_state(p2p, P2P_IDLE); 3615 return; 3616 } 3617 } else if (dev->go_neg_req_sent) { 3618 /* Cancel the increment from p2p_connect_send() on failure */ 3619 dev->go_neg_req_sent--; 3620 } 3621 3622 if (!success && 3623 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) && 3624 !is_zero_ether_addr(dev->member_in_go_dev)) { 3625 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO", 3626 MAC2STR(dev->info.p2p_device_addr)); 3627 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3628 p2p_send_dev_disc_req(p2p, dev); 3629 return; 3630 } 3631 3632 /* 3633 * Use P2P find, if needed, to find the other device from its listen 3634 * channel. 3635 */ 3636 p2p_set_state(p2p, P2P_CONNECT); 3637 timeout = success ? 500000 : 100000; 3638 if (!success && p2p->go_neg_peer && 3639 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) { 3640 unsigned int r; 3641 /* 3642 * Peer is expected to wait our response and we will skip the 3643 * listen phase. Add some randomness to the wait time here to 3644 * make it less likely to hit cases where we could end up in 3645 * sync with peer not listening. 3646 */ 3647 if (os_get_random((u8 *) &r, sizeof(r)) < 0) 3648 r = 0; 3649 timeout += r % 100000; 3650 } 3651 p2p_set_timeout(p2p, 0, timeout); 3652 } 3653 3654 3655 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success) 3656 { 3657 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d", 3658 success); 3659 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) { 3660 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore"); 3661 return; 3662 } 3663 p2p_set_state(p2p, P2P_CONNECT); 3664 p2p_set_timeout(p2p, 0, 500000); 3665 } 3666 3667 3668 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success, 3669 const u8 *addr) 3670 { 3671 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success); 3672 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) { 3673 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status); 3674 return; 3675 } 3676 3677 if (success) { 3678 struct p2p_device *dev; 3679 dev = p2p_get_device(p2p, addr); 3680 if (dev && 3681 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) 3682 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE; 3683 } 3684 3685 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND) 3686 p2p_continue_find(p2p); 3687 } 3688 3689 3690 static void p2p_go_neg_conf_cb(struct p2p_data *p2p, 3691 enum p2p_send_action_result result) 3692 { 3693 struct p2p_device *dev; 3694 3695 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result); 3696 if (result == P2P_SEND_ACTION_FAILED) { 3697 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3698 p2p_go_neg_failed(p2p, -1); 3699 return; 3700 } 3701 3702 dev = p2p->go_neg_peer; 3703 3704 if (result == P2P_SEND_ACTION_NO_ACK) { 3705 /* 3706 * Retry GO Negotiation Confirmation 3707 * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive 3708 * ACK for confirmation. 3709 */ 3710 if (dev && dev->go_neg_conf && 3711 dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) { 3712 p2p_dbg(p2p, "GO Negotiation Confirm retry %d", 3713 dev->go_neg_conf_sent); 3714 p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM; 3715 if (p2p_send_action(p2p, dev->go_neg_conf_freq, 3716 dev->info.p2p_device_addr, 3717 p2p->cfg->dev_addr, 3718 dev->info.p2p_device_addr, 3719 wpabuf_head(dev->go_neg_conf), 3720 wpabuf_len(dev->go_neg_conf), 0) >= 3721 0) { 3722 dev->go_neg_conf_sent++; 3723 return; 3724 } 3725 p2p_dbg(p2p, "Failed to re-send Action frame"); 3726 3727 /* 3728 * Continue with the assumption that the first attempt 3729 * went through and just the ACK frame was lost. 3730 */ 3731 } 3732 3733 /* 3734 * It looks like the TX status for GO Negotiation Confirm is 3735 * often showing failure even when the peer has actually 3736 * received the frame. Since the peer may change channels 3737 * immediately after having received the frame, we may not see 3738 * an Ack for retries, so just dropping a single frame may 3739 * trigger this. To allow the group formation to succeed if the 3740 * peer did indeed receive the frame, continue regardless of 3741 * the TX status. 3742 */ 3743 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported"); 3744 } 3745 3746 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3747 3748 if (dev == NULL) 3749 return; 3750 3751 p2p_go_complete(p2p, dev); 3752 } 3753 3754 3755 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 3756 const u8 *src, const u8 *bssid, 3757 enum p2p_send_action_result result) 3758 { 3759 enum p2p_pending_action_state state; 3760 int success; 3761 3762 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR 3763 " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)", 3764 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), 3765 MAC2STR(bssid), result, p2p_state_txt(p2p->state)); 3766 success = result == P2P_SEND_ACTION_SUCCESS; 3767 state = p2p->pending_action_state; 3768 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3769 switch (state) { 3770 case P2P_NO_PENDING_ACTION: 3771 if (p2p->send_action_in_progress) { 3772 p2p->send_action_in_progress = 0; 3773 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3774 } 3775 p2p_check_after_scan_tx_continuation(p2p); 3776 break; 3777 case P2P_PENDING_GO_NEG_REQUEST: 3778 p2p_go_neg_req_cb(p2p, success); 3779 break; 3780 case P2P_PENDING_GO_NEG_RESPONSE: 3781 p2p_go_neg_resp_cb(p2p, success); 3782 break; 3783 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE: 3784 p2p_go_neg_resp_failure_cb(p2p, success, dst); 3785 break; 3786 case P2P_PENDING_GO_NEG_CONFIRM: 3787 p2p_go_neg_conf_cb(p2p, result); 3788 break; 3789 case P2P_PENDING_SD: 3790 p2p_sd_cb(p2p, success); 3791 break; 3792 case P2P_PENDING_PD: 3793 p2p_prov_disc_cb(p2p, success); 3794 break; 3795 case P2P_PENDING_PD_RESPONSE: 3796 p2p_prov_disc_resp_cb(p2p, success); 3797 break; 3798 case P2P_PENDING_INVITATION_REQUEST: 3799 p2p_invitation_req_cb(p2p, success); 3800 break; 3801 case P2P_PENDING_INVITATION_RESPONSE: 3802 p2p_invitation_resp_cb(p2p, success); 3803 if (p2p->inv_status != P2P_SC_SUCCESS) 3804 p2p_check_after_scan_tx_continuation(p2p); 3805 break; 3806 case P2P_PENDING_DEV_DISC_REQUEST: 3807 p2p_dev_disc_req_cb(p2p, success); 3808 break; 3809 case P2P_PENDING_DEV_DISC_RESPONSE: 3810 p2p_dev_disc_resp_cb(p2p, success); 3811 break; 3812 case P2P_PENDING_GO_DISC_REQ: 3813 p2p_go_disc_req_cb(p2p, success); 3814 break; 3815 } 3816 3817 p2p->after_scan_tx_in_progress = 0; 3818 } 3819 3820 3821 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq, 3822 unsigned int duration) 3823 { 3824 if (freq == p2p->pending_client_disc_freq) { 3825 p2p_dbg(p2p, "Client discoverability remain-awake completed"); 3826 p2p->pending_client_disc_freq = 0; 3827 return; 3828 } 3829 3830 if (freq != p2p->pending_listen_freq) { 3831 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)", 3832 freq, duration, p2p->pending_listen_freq); 3833 return; 3834 } 3835 3836 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback", 3837 p2p->pending_listen_sec, p2p->pending_listen_usec, 3838 p2p->pending_listen_freq); 3839 p2p->in_listen = 1; 3840 p2p->drv_in_listen = freq; 3841 if (p2p->pending_listen_sec || p2p->pending_listen_usec) { 3842 /* 3843 * Add 20 msec extra wait to avoid race condition with driver 3844 * remain-on-channel end event, i.e., give driver more time to 3845 * complete the operation before our timeout expires. 3846 */ 3847 p2p_set_timeout(p2p, p2p->pending_listen_sec, 3848 p2p->pending_listen_usec + 20000); 3849 } 3850 3851 p2p->pending_listen_freq = 0; 3852 } 3853 3854 3855 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq) 3856 { 3857 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq); 3858 p2p->drv_in_listen = 0; 3859 if (p2p->in_listen) 3860 return 0; /* Internal timeout will trigger the next step */ 3861 3862 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) { 3863 if (p2p->go_neg_peer->connect_reqs >= 120) { 3864 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3865 p2p_go_neg_failed(p2p, -1); 3866 return 0; 3867 } 3868 3869 p2p_set_state(p2p, P2P_CONNECT); 3870 p2p_connect_send(p2p, p2p->go_neg_peer); 3871 return 1; 3872 } else if (p2p->state == P2P_SEARCH) { 3873 if (p2p->p2p_scan_running) { 3874 /* 3875 * Search is already in progress. This can happen if 3876 * an Action frame RX is reported immediately after 3877 * the end of a remain-on-channel operation and the 3878 * response frame to that is sent using an offchannel 3879 * operation while in p2p_find. Avoid an attempt to 3880 * restart a scan here. 3881 */ 3882 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one"); 3883 return 1; 3884 } 3885 if (p2p->pending_listen_freq) { 3886 /* 3887 * Better wait a bit if the driver is unable to start 3888 * offchannel operation for some reason. p2p_search() 3889 * will be started from internal timeout. 3890 */ 3891 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop"); 3892 p2p_set_timeout(p2p, 0, 100000); 3893 return 1; 3894 } 3895 if (p2p->search_delay) { 3896 p2p_dbg(p2p, "Delay search operation by %u ms", 3897 p2p->search_delay); 3898 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3899 (p2p->search_delay % 1000) * 1000); 3900 return 1; 3901 } 3902 p2p_search(p2p); 3903 return 1; 3904 } 3905 3906 return 0; 3907 } 3908 3909 3910 static void p2p_timeout_connect(struct p2p_data *p2p) 3911 { 3912 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3913 if (p2p->go_neg_peer && 3914 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 3915 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed"); 3916 p2p_go_neg_failed(p2p, -1); 3917 return; 3918 } 3919 if (p2p->go_neg_peer && 3920 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) && 3921 p2p->go_neg_peer->connect_reqs < 120) { 3922 p2p_dbg(p2p, "Peer expected to wait our response - skip listen"); 3923 p2p_connect_send(p2p, p2p->go_neg_peer); 3924 return; 3925 } 3926 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) { 3927 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)"); 3928 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3929 p2p_set_timeout(p2p, 0, 30000); 3930 return; 3931 } 3932 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3933 p2p_listen_in_find(p2p, 0); 3934 } 3935 3936 3937 static void p2p_timeout_connect_listen(struct p2p_data *p2p) 3938 { 3939 if (p2p->go_neg_peer) { 3940 if (p2p->drv_in_listen) { 3941 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete"); 3942 return; 3943 } 3944 3945 if (p2p->go_neg_peer->connect_reqs >= 120) { 3946 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3947 p2p_go_neg_failed(p2p, -1); 3948 return; 3949 } 3950 3951 p2p_set_state(p2p, P2P_CONNECT); 3952 p2p_connect_send(p2p, p2p->go_neg_peer); 3953 } else 3954 p2p_set_state(p2p, P2P_IDLE); 3955 } 3956 3957 3958 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p) 3959 { 3960 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 3961 3962 if (p2p->cfg->is_concurrent_session_active && 3963 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx)) 3964 p2p_set_timeout(p2p, 0, 500000); 3965 else 3966 p2p_set_timeout(p2p, 0, 200000); 3967 } 3968 3969 3970 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p) 3971 { 3972 struct p2p_device *dev = p2p->go_neg_peer; 3973 3974 if (dev == NULL) { 3975 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait"); 3976 return; 3977 } 3978 3979 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation"); 3980 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT); 3981 p2p_listen_in_find(p2p, 0); 3982 } 3983 3984 3985 static void p2p_timeout_sd_during_find(struct p2p_data *p2p) 3986 { 3987 p2p_dbg(p2p, "Service Discovery Query timeout"); 3988 if (p2p->sd_peer) { 3989 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3990 p2p->sd_peer = NULL; 3991 } 3992 p2p_continue_find(p2p); 3993 } 3994 3995 3996 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p) 3997 { 3998 p2p_dbg(p2p, "Provision Discovery Request timeout"); 3999 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 4000 p2p_continue_find(p2p); 4001 } 4002 4003 4004 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p) 4005 { 4006 u32 adv_id = 0; 4007 u8 *adv_mac = NULL; 4008 4009 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 4010 4011 /* 4012 * For user initiated PD requests that we have not gotten any responses 4013 * for while in IDLE state, we retry them a couple of times before 4014 * giving up. 4015 */ 4016 if (!p2p->user_initiated_pd) 4017 return; 4018 4019 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout"); 4020 4021 if (p2p->pd_retries) { 4022 p2p->pd_retries--; 4023 p2p_retry_pd(p2p); 4024 } else { 4025 struct p2p_device *dev; 4026 int for_join = 0; 4027 4028 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 4029 if (os_memcmp(p2p->pending_pd_devaddr, 4030 dev->info.p2p_device_addr, ETH_ALEN) != 0) 4031 continue; 4032 if (dev->req_config_methods && 4033 (dev->flags & P2P_DEV_PD_FOR_JOIN)) 4034 for_join = 1; 4035 } 4036 4037 if (p2p->p2ps_prov) { 4038 adv_id = p2p->p2ps_prov->adv_id; 4039 adv_mac = p2p->p2ps_prov->adv_mac; 4040 } 4041 4042 if (p2p->cfg->prov_disc_fail) 4043 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, 4044 p2p->pending_pd_devaddr, 4045 for_join ? 4046 P2P_PROV_DISC_TIMEOUT_JOIN : 4047 P2P_PROV_DISC_TIMEOUT, 4048 adv_id, adv_mac, NULL); 4049 p2p_reset_pending_pd(p2p); 4050 } 4051 } 4052 4053 4054 static void p2p_timeout_invite(struct p2p_data *p2p) 4055 { 4056 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 4057 p2p_set_state(p2p, P2P_INVITE_LISTEN); 4058 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 4059 /* 4060 * Better remain on operating channel instead of listen channel 4061 * when running a group. 4062 */ 4063 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel"); 4064 p2p_set_timeout(p2p, 0, 100000); 4065 return; 4066 } 4067 p2p_listen_in_find(p2p, 0); 4068 } 4069 4070 4071 static void p2p_timeout_invite_listen(struct p2p_data *p2p) 4072 { 4073 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) { 4074 p2p_set_state(p2p, P2P_INVITE); 4075 p2p_invite_send(p2p, p2p->invite_peer, 4076 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id); 4077 } else { 4078 if (p2p->invite_peer) { 4079 p2p_dbg(p2p, "Invitation Request retry limit reached"); 4080 if (p2p->cfg->invitation_result) 4081 p2p->cfg->invitation_result( 4082 p2p->cfg->cb_ctx, -1, NULL, NULL, 4083 p2p->invite_peer->info.p2p_device_addr, 4084 0, 0); 4085 } 4086 p2p_set_state(p2p, P2P_IDLE); 4087 } 4088 } 4089 4090 4091 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx) 4092 { 4093 struct p2p_data *p2p = eloop_ctx; 4094 4095 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state)); 4096 4097 p2p->in_listen = 0; 4098 if (p2p->drv_in_listen) { 4099 p2p_dbg(p2p, "Driver is still in listen state - stop it"); 4100 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 4101 } 4102 4103 switch (p2p->state) { 4104 case P2P_IDLE: 4105 /* Check if we timed out waiting for PD req */ 4106 if (p2p->pending_action_state == P2P_PENDING_PD) 4107 p2p_timeout_prov_disc_req(p2p); 4108 break; 4109 case P2P_SEARCH: 4110 /* Check if we timed out waiting for PD req */ 4111 if (p2p->pending_action_state == P2P_PENDING_PD) 4112 p2p_timeout_prov_disc_req(p2p); 4113 if (p2p->search_delay && !p2p->in_search_delay) { 4114 p2p_dbg(p2p, "Delay search operation by %u ms", 4115 p2p->search_delay); 4116 p2p->in_search_delay = 1; 4117 p2p_set_timeout(p2p, p2p->search_delay / 1000, 4118 (p2p->search_delay % 1000) * 1000); 4119 break; 4120 } 4121 p2p->in_search_delay = 0; 4122 p2p_search(p2p); 4123 break; 4124 case P2P_CONNECT: 4125 p2p_timeout_connect(p2p); 4126 break; 4127 case P2P_CONNECT_LISTEN: 4128 p2p_timeout_connect_listen(p2p); 4129 break; 4130 case P2P_GO_NEG: 4131 break; 4132 case P2P_LISTEN_ONLY: 4133 /* Check if we timed out waiting for PD req */ 4134 if (p2p->pending_action_state == P2P_PENDING_PD) 4135 p2p_timeout_prov_disc_req(p2p); 4136 4137 if (p2p->ext_listen_only) { 4138 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed"); 4139 p2p->ext_listen_only = 0; 4140 p2p_set_state(p2p, P2P_IDLE); 4141 } 4142 break; 4143 case P2P_WAIT_PEER_CONNECT: 4144 p2p_timeout_wait_peer_connect(p2p); 4145 break; 4146 case P2P_WAIT_PEER_IDLE: 4147 p2p_timeout_wait_peer_idle(p2p); 4148 break; 4149 case P2P_SD_DURING_FIND: 4150 p2p_timeout_sd_during_find(p2p); 4151 break; 4152 case P2P_PROVISIONING: 4153 break; 4154 case P2P_PD_DURING_FIND: 4155 p2p_timeout_prov_disc_during_find(p2p); 4156 break; 4157 case P2P_INVITE: 4158 p2p_timeout_invite(p2p); 4159 break; 4160 case P2P_INVITE_LISTEN: 4161 p2p_timeout_invite_listen(p2p); 4162 break; 4163 } 4164 } 4165 4166 4167 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr) 4168 { 4169 struct p2p_device *dev; 4170 4171 dev = p2p_get_device(p2p, peer_addr); 4172 p2p_dbg(p2p, "Local request to reject connection attempts by peer " 4173 MACSTR, MAC2STR(peer_addr)); 4174 if (dev == NULL) { 4175 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr)); 4176 return -1; 4177 } 4178 dev->status = P2P_SC_FAIL_REJECTED_BY_USER; 4179 dev->flags |= P2P_DEV_USER_REJECTED; 4180 return 0; 4181 } 4182 4183 4184 const char * p2p_wps_method_text(enum p2p_wps_method method) 4185 { 4186 switch (method) { 4187 case WPS_NOT_READY: 4188 return "not-ready"; 4189 case WPS_PIN_DISPLAY: 4190 return "Display"; 4191 case WPS_PIN_KEYPAD: 4192 return "Keypad"; 4193 case WPS_PBC: 4194 return "PBC"; 4195 case WPS_NFC: 4196 return "NFC"; 4197 case WPS_P2PS: 4198 return "P2PS"; 4199 } 4200 4201 return "??"; 4202 } 4203 4204 4205 static const char * p2p_go_state_text(enum p2p_go_state go_state) 4206 { 4207 switch (go_state) { 4208 case UNKNOWN_GO: 4209 return "unknown"; 4210 case LOCAL_GO: 4211 return "local"; 4212 case REMOTE_GO: 4213 return "remote"; 4214 } 4215 4216 return "??"; 4217 } 4218 4219 4220 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p, 4221 const u8 *addr, int next) 4222 { 4223 struct p2p_device *dev; 4224 4225 if (addr) 4226 dev = p2p_get_device(p2p, addr); 4227 else 4228 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4229 4230 if (dev && next) { 4231 dev = dl_list_first(&dev->list, struct p2p_device, list); 4232 if (&dev->list == &p2p->devices) 4233 dev = NULL; 4234 } 4235 4236 if (dev == NULL) 4237 return NULL; 4238 4239 return &dev->info; 4240 } 4241 4242 4243 int p2p_get_peer_info_txt(const struct p2p_peer_info *info, 4244 char *buf, size_t buflen) 4245 { 4246 struct p2p_device *dev; 4247 int res; 4248 char *pos, *end; 4249 struct os_reltime now; 4250 4251 if (info == NULL) 4252 return -1; 4253 4254 dev = (struct p2p_device *) (((u8 *) info) - 4255 offsetof(struct p2p_device, info)); 4256 4257 pos = buf; 4258 end = buf + buflen; 4259 4260 os_get_reltime(&now); 4261 res = os_snprintf(pos, end - pos, 4262 "age=%d\n" 4263 "listen_freq=%d\n" 4264 "wps_method=%s\n" 4265 "interface_addr=" MACSTR "\n" 4266 "member_in_go_dev=" MACSTR "\n" 4267 "member_in_go_iface=" MACSTR "\n" 4268 "go_neg_req_sent=%d\n" 4269 "go_state=%s\n" 4270 "dialog_token=%u\n" 4271 "intended_addr=" MACSTR "\n" 4272 "country=%c%c\n" 4273 "oper_freq=%d\n" 4274 "req_config_methods=0x%x\n" 4275 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n" 4276 "status=%d\n" 4277 "invitation_reqs=%u\n", 4278 (int) (now.sec - dev->last_seen.sec), 4279 dev->listen_freq, 4280 p2p_wps_method_text(dev->wps_method), 4281 MAC2STR(dev->interface_addr), 4282 MAC2STR(dev->member_in_go_dev), 4283 MAC2STR(dev->member_in_go_iface), 4284 dev->go_neg_req_sent, 4285 p2p_go_state_text(dev->go_state), 4286 dev->dialog_token, 4287 MAC2STR(dev->intended_addr), 4288 dev->country[0] ? dev->country[0] : '_', 4289 dev->country[1] ? dev->country[1] : '_', 4290 dev->oper_freq, 4291 dev->req_config_methods, 4292 dev->flags & P2P_DEV_PROBE_REQ_ONLY ? 4293 "[PROBE_REQ_ONLY]" : "", 4294 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "", 4295 dev->flags & P2P_DEV_NOT_YET_READY ? 4296 "[NOT_YET_READY]" : "", 4297 dev->flags & P2P_DEV_PD_PEER_DISPLAY ? 4298 "[PD_PEER_DISPLAY]" : "", 4299 dev->flags & P2P_DEV_PD_PEER_KEYPAD ? 4300 "[PD_PEER_KEYPAD]" : "", 4301 dev->flags & P2P_DEV_PD_PEER_P2PS ? 4302 "[PD_PEER_P2PS]" : "", 4303 dev->flags & P2P_DEV_USER_REJECTED ? 4304 "[USER_REJECTED]" : "", 4305 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ? 4306 "[PEER_WAITING_RESPONSE]" : "", 4307 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ? 4308 "[PREFER_PERSISTENT_GROUP]" : "", 4309 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ? 4310 "[WAIT_GO_NEG_RESPONSE]" : "", 4311 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ? 4312 "[WAIT_GO_NEG_CONFIRM]" : "", 4313 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ? 4314 "[GROUP_CLIENT_ONLY]" : "", 4315 dev->flags & P2P_DEV_FORCE_FREQ ? 4316 "[FORCE_FREQ]" : "", 4317 dev->flags & P2P_DEV_PD_FOR_JOIN ? 4318 "[PD_FOR_JOIN]" : "", 4319 dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT ? 4320 "[LAST_SEEN_AS_GROUP_CLIENT]" : "", 4321 dev->status, 4322 dev->invitation_reqs); 4323 if (os_snprintf_error(end - pos, res)) 4324 return pos - buf; 4325 pos += res; 4326 4327 if (dev->ext_listen_period) { 4328 res = os_snprintf(pos, end - pos, 4329 "ext_listen_period=%u\n" 4330 "ext_listen_interval=%u\n", 4331 dev->ext_listen_period, 4332 dev->ext_listen_interval); 4333 if (os_snprintf_error(end - pos, res)) 4334 return pos - buf; 4335 pos += res; 4336 } 4337 4338 if (dev->oper_ssid_len) { 4339 res = os_snprintf(pos, end - pos, 4340 "oper_ssid=%s\n", 4341 wpa_ssid_txt(dev->oper_ssid, 4342 dev->oper_ssid_len)); 4343 if (os_snprintf_error(end - pos, res)) 4344 return pos - buf; 4345 pos += res; 4346 } 4347 4348 #ifdef CONFIG_WIFI_DISPLAY 4349 if (dev->info.wfd_subelems) { 4350 res = os_snprintf(pos, end - pos, "wfd_subelems="); 4351 if (os_snprintf_error(end - pos, res)) 4352 return pos - buf; 4353 pos += res; 4354 4355 pos += wpa_snprintf_hex(pos, end - pos, 4356 wpabuf_head(dev->info.wfd_subelems), 4357 wpabuf_len(dev->info.wfd_subelems)); 4358 4359 res = os_snprintf(pos, end - pos, "\n"); 4360 if (os_snprintf_error(end - pos, res)) 4361 return pos - buf; 4362 pos += res; 4363 } 4364 #endif /* CONFIG_WIFI_DISPLAY */ 4365 4366 return pos - buf; 4367 } 4368 4369 4370 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr) 4371 { 4372 return p2p_get_device(p2p, addr) != NULL; 4373 } 4374 4375 4376 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled) 4377 { 4378 if (enabled) { 4379 p2p_dbg(p2p, "Client discoverability enabled"); 4380 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 4381 } else { 4382 p2p_dbg(p2p, "Client discoverability disabled"); 4383 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 4384 } 4385 } 4386 4387 4388 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1, 4389 u32 duration2, u32 interval2) 4390 { 4391 struct wpabuf *req; 4392 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL; 4393 u8 *len; 4394 4395 req = wpabuf_alloc(100); 4396 if (req == NULL) 4397 return NULL; 4398 4399 if (duration1 || interval1) { 4400 os_memset(&desc1, 0, sizeof(desc1)); 4401 desc1.count_type = 1; 4402 desc1.duration = duration1; 4403 desc1.interval = interval1; 4404 ptr1 = &desc1; 4405 4406 if (duration2 || interval2) { 4407 os_memset(&desc2, 0, sizeof(desc2)); 4408 desc2.count_type = 2; 4409 desc2.duration = duration2; 4410 desc2.interval = interval2; 4411 ptr2 = &desc2; 4412 } 4413 } 4414 4415 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1); 4416 len = p2p_buf_add_ie_hdr(req); 4417 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2); 4418 p2p_buf_update_ie_hdr(req, len); 4419 4420 return req; 4421 } 4422 4423 4424 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr, 4425 const u8 *own_interface_addr, unsigned int freq, 4426 u32 duration1, u32 interval1, u32 duration2, 4427 u32 interval2) 4428 { 4429 struct wpabuf *req; 4430 4431 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR 4432 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u " 4433 "dur2=%u int2=%u", 4434 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr), 4435 freq, duration1, interval1, duration2, interval2); 4436 4437 req = p2p_build_presence_req(duration1, interval1, duration2, 4438 interval2); 4439 if (req == NULL) 4440 return -1; 4441 4442 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 4443 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr, 4444 go_interface_addr, 4445 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 4446 p2p_dbg(p2p, "Failed to send Action frame"); 4447 } 4448 wpabuf_free(req); 4449 4450 return 0; 4451 } 4452 4453 4454 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa, 4455 size_t noa_len, u8 dialog_token) 4456 { 4457 struct wpabuf *resp; 4458 u8 *len; 4459 4460 resp = wpabuf_alloc(100 + noa_len); 4461 if (resp == NULL) 4462 return NULL; 4463 4464 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token); 4465 len = p2p_buf_add_ie_hdr(resp); 4466 p2p_buf_add_status(resp, status); 4467 if (noa) { 4468 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE); 4469 wpabuf_put_le16(resp, noa_len); 4470 wpabuf_put_data(resp, noa, noa_len); 4471 } else 4472 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL); 4473 p2p_buf_update_ie_hdr(resp, len); 4474 4475 return resp; 4476 } 4477 4478 4479 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 4480 const u8 *sa, const u8 *data, size_t len, 4481 int rx_freq) 4482 { 4483 struct p2p_message msg; 4484 u8 status; 4485 struct wpabuf *resp; 4486 size_t g; 4487 struct p2p_group *group = NULL; 4488 int parsed = 0; 4489 u8 noa[50]; 4490 int noa_len; 4491 4492 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request"); 4493 4494 for (g = 0; g < p2p->num_groups; g++) { 4495 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]), 4496 ETH_ALEN) == 0) { 4497 group = p2p->groups[g]; 4498 break; 4499 } 4500 } 4501 if (group == NULL) { 4502 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group " 4503 MACSTR, MAC2STR(da)); 4504 return; 4505 } 4506 4507 if (p2p_parse(data, len, &msg) < 0) { 4508 p2p_dbg(p2p, "Failed to parse P2P Presence Request"); 4509 status = P2P_SC_FAIL_INVALID_PARAMS; 4510 goto fail; 4511 } 4512 parsed = 1; 4513 4514 if (msg.noa == NULL) { 4515 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request"); 4516 status = P2P_SC_FAIL_INVALID_PARAMS; 4517 goto fail; 4518 } 4519 4520 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len); 4521 4522 fail: 4523 if (p2p->cfg->get_noa) 4524 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa, 4525 sizeof(noa)); 4526 else 4527 noa_len = -1; 4528 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL, 4529 noa_len > 0 ? noa_len : 0, 4530 msg.dialog_token); 4531 if (parsed) 4532 p2p_parse_free(&msg); 4533 if (resp == NULL) 4534 return; 4535 4536 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 4537 if (p2p_send_action(p2p, rx_freq, sa, da, da, 4538 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 4539 p2p_dbg(p2p, "Failed to send Action frame"); 4540 } 4541 wpabuf_free(resp); 4542 } 4543 4544 4545 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 4546 const u8 *sa, const u8 *data, size_t len) 4547 { 4548 struct p2p_message msg; 4549 4550 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response"); 4551 4552 if (p2p_parse(data, len, &msg) < 0) { 4553 p2p_dbg(p2p, "Failed to parse P2P Presence Response"); 4554 return; 4555 } 4556 4557 if (msg.status == NULL || msg.noa == NULL) { 4558 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response"); 4559 p2p_parse_free(&msg); 4560 return; 4561 } 4562 4563 if (p2p->cfg->presence_resp) { 4564 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status, 4565 msg.noa, msg.noa_len); 4566 } 4567 4568 if (*msg.status) { 4569 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u", 4570 *msg.status); 4571 p2p_parse_free(&msg); 4572 return; 4573 } 4574 4575 p2p_dbg(p2p, "P2P Presence Request was accepted"); 4576 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA", 4577 msg.noa, msg.noa_len); 4578 /* TODO: process NoA */ 4579 p2p_parse_free(&msg); 4580 } 4581 4582 4583 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx) 4584 { 4585 struct p2p_data *p2p = eloop_ctx; 4586 4587 if (p2p->ext_listen_interval) { 4588 /* Schedule next extended listen timeout */ 4589 eloop_register_timeout(p2p->ext_listen_interval_sec, 4590 p2p->ext_listen_interval_usec, 4591 p2p_ext_listen_timeout, p2p, NULL); 4592 } 4593 4594 if ((p2p->cfg->is_p2p_in_progress && 4595 p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) || 4596 (p2p->pending_action_state == P2P_PENDING_PD && 4597 p2p->pd_retries > 0)) { 4598 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)", 4599 p2p_state_txt(p2p->state)); 4600 return; 4601 } 4602 4603 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) { 4604 /* 4605 * This should not really happen, but it looks like the Listen 4606 * command may fail is something else (e.g., a scan) was 4607 * running at an inconvenient time. As a workaround, allow new 4608 * Extended Listen operation to be started. 4609 */ 4610 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again"); 4611 p2p->ext_listen_only = 0; 4612 p2p_set_state(p2p, P2P_IDLE); 4613 } 4614 4615 if (p2p->state != P2P_IDLE) { 4616 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state)); 4617 return; 4618 } 4619 4620 p2p_dbg(p2p, "Extended Listen timeout"); 4621 p2p->ext_listen_only = 1; 4622 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) { 4623 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing"); 4624 p2p->ext_listen_only = 0; 4625 } 4626 } 4627 4628 4629 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period, 4630 unsigned int interval) 4631 { 4632 if (period > 65535 || interval > 65535 || period > interval || 4633 (period == 0 && interval > 0) || (period > 0 && interval == 0)) { 4634 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u", 4635 period, interval); 4636 return -1; 4637 } 4638 4639 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 4640 4641 if (interval == 0) { 4642 p2p_dbg(p2p, "Disabling Extended Listen Timing"); 4643 p2p->ext_listen_period = 0; 4644 p2p->ext_listen_interval = 0; 4645 return 0; 4646 } 4647 4648 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec", 4649 period, interval); 4650 p2p->ext_listen_period = period; 4651 p2p->ext_listen_interval = interval; 4652 p2p->ext_listen_interval_sec = interval / 1000; 4653 p2p->ext_listen_interval_usec = (interval % 1000) * 1000; 4654 4655 eloop_register_timeout(p2p->ext_listen_interval_sec, 4656 p2p->ext_listen_interval_usec, 4657 p2p_ext_listen_timeout, p2p, NULL); 4658 4659 return 0; 4660 } 4661 4662 4663 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 4664 const u8 *ie, size_t ie_len) 4665 { 4666 struct p2p_message msg; 4667 4668 if (bssid == NULL || ie == NULL) 4669 return; 4670 4671 os_memset(&msg, 0, sizeof(msg)); 4672 if (p2p_parse_ies(ie, ie_len, &msg)) 4673 return; 4674 if (msg.minor_reason_code == NULL) { 4675 p2p_parse_free(&msg); 4676 return; 4677 } 4678 4679 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR 4680 " reason_code=%u minor_reason_code=%u", 4681 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4682 4683 p2p_parse_free(&msg); 4684 } 4685 4686 4687 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 4688 const u8 *ie, size_t ie_len) 4689 { 4690 struct p2p_message msg; 4691 4692 if (bssid == NULL || ie == NULL) 4693 return; 4694 4695 os_memset(&msg, 0, sizeof(msg)); 4696 if (p2p_parse_ies(ie, ie_len, &msg)) 4697 return; 4698 if (msg.minor_reason_code == NULL) { 4699 p2p_parse_free(&msg); 4700 return; 4701 } 4702 4703 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR 4704 " reason_code=%u minor_reason_code=%u", 4705 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4706 4707 p2p_parse_free(&msg); 4708 } 4709 4710 4711 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled) 4712 { 4713 if (enabled) { 4714 p2p_dbg(p2p, "Managed P2P Device operations enabled"); 4715 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED; 4716 } else { 4717 p2p_dbg(p2p, "Managed P2P Device operations disabled"); 4718 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED; 4719 } 4720 } 4721 4722 4723 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class, 4724 u8 *op_channel) 4725 { 4726 return p2p_channel_random_social(&p2p->channels, op_class, op_channel); 4727 } 4728 4729 4730 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel, 4731 u8 forced) 4732 { 4733 if (p2p_channel_to_freq(reg_class, channel) < 0) 4734 return -1; 4735 4736 /* 4737 * Listen channel was set in configuration or set by control interface; 4738 * cannot override it. 4739 */ 4740 if (p2p->cfg->channel_forced && forced == 0) { 4741 p2p_dbg(p2p, 4742 "Listen channel was previously configured - do not override based on optimization"); 4743 return -1; 4744 } 4745 4746 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u", 4747 reg_class, channel); 4748 4749 if (p2p->state == P2P_IDLE) { 4750 p2p->cfg->reg_class = reg_class; 4751 p2p->cfg->channel = channel; 4752 p2p->cfg->channel_forced = forced; 4753 } else { 4754 p2p_dbg(p2p, "Defer setting listen channel"); 4755 p2p->pending_reg_class = reg_class; 4756 p2p->pending_channel = channel; 4757 p2p->pending_channel_forced = forced; 4758 } 4759 4760 return 0; 4761 } 4762 4763 4764 u8 p2p_get_listen_channel(struct p2p_data *p2p) 4765 { 4766 return p2p->cfg->channel; 4767 } 4768 4769 4770 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len) 4771 { 4772 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len)); 4773 if (postfix == NULL) { 4774 p2p->cfg->ssid_postfix_len = 0; 4775 return 0; 4776 } 4777 if (len > sizeof(p2p->cfg->ssid_postfix)) 4778 return -1; 4779 os_memcpy(p2p->cfg->ssid_postfix, postfix, len); 4780 p2p->cfg->ssid_postfix_len = len; 4781 return 0; 4782 } 4783 4784 4785 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel, 4786 int cfg_op_channel) 4787 { 4788 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0) 4789 return -1; 4790 4791 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u", 4792 op_reg_class, op_channel); 4793 p2p->cfg->op_reg_class = op_reg_class; 4794 p2p->cfg->op_channel = op_channel; 4795 p2p->cfg->cfg_op_channel = cfg_op_channel; 4796 return 0; 4797 } 4798 4799 4800 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan, 4801 const struct p2p_channel *pref_chan) 4802 { 4803 struct p2p_channel *n; 4804 4805 if (pref_chan) { 4806 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel)); 4807 if (n == NULL) 4808 return -1; 4809 os_memcpy(n, pref_chan, 4810 num_pref_chan * sizeof(struct p2p_channel)); 4811 } else 4812 n = NULL; 4813 4814 os_free(p2p->cfg->pref_chan); 4815 p2p->cfg->pref_chan = n; 4816 p2p->cfg->num_pref_chan = num_pref_chan; 4817 4818 return 0; 4819 } 4820 4821 4822 int p2p_set_no_go_freq(struct p2p_data *p2p, 4823 const struct wpa_freq_range_list *list) 4824 { 4825 struct wpa_freq_range *tmp; 4826 4827 if (list == NULL || list->num == 0) { 4828 os_free(p2p->no_go_freq.range); 4829 p2p->no_go_freq.range = NULL; 4830 p2p->no_go_freq.num = 0; 4831 return 0; 4832 } 4833 4834 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range)); 4835 if (tmp == NULL) 4836 return -1; 4837 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range)); 4838 os_free(p2p->no_go_freq.range); 4839 p2p->no_go_freq.range = tmp; 4840 p2p->no_go_freq.num = list->num; 4841 p2p_dbg(p2p, "Updated no GO chan list"); 4842 4843 return 0; 4844 } 4845 4846 4847 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr, 4848 u8 *iface_addr) 4849 { 4850 struct p2p_device *dev = p2p_get_device(p2p, dev_addr); 4851 if (dev == NULL || is_zero_ether_addr(dev->interface_addr)) 4852 return -1; 4853 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN); 4854 return 0; 4855 } 4856 4857 4858 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr, 4859 u8 *dev_addr) 4860 { 4861 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4862 if (dev == NULL) 4863 return -1; 4864 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN); 4865 return 0; 4866 } 4867 4868 4869 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr) 4870 { 4871 os_memcpy(p2p->peer_filter, addr, ETH_ALEN); 4872 if (is_zero_ether_addr(p2p->peer_filter)) 4873 p2p_dbg(p2p, "Disable peer filter"); 4874 else 4875 p2p_dbg(p2p, "Enable peer filter for " MACSTR, 4876 MAC2STR(p2p->peer_filter)); 4877 } 4878 4879 4880 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled) 4881 { 4882 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled"); 4883 if (p2p->cross_connect == enabled) 4884 return; 4885 p2p->cross_connect = enabled; 4886 /* TODO: may need to tear down any action group where we are GO(?) */ 4887 } 4888 4889 4890 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr) 4891 { 4892 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4893 if (dev == NULL) 4894 return -1; 4895 if (dev->oper_freq <= 0) 4896 return -1; 4897 return dev->oper_freq; 4898 } 4899 4900 4901 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled) 4902 { 4903 p2p_dbg(p2p, "Intra BSS distribution %s", 4904 enabled ? "enabled" : "disabled"); 4905 p2p->cfg->p2p_intra_bss = enabled; 4906 } 4907 4908 4909 void p2p_update_channel_list(struct p2p_data *p2p, 4910 const struct p2p_channels *chan, 4911 const struct p2p_channels *cli_chan) 4912 { 4913 p2p_dbg(p2p, "Update channel list"); 4914 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels)); 4915 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 4916 os_memcpy(&p2p->cfg->cli_channels, cli_chan, 4917 sizeof(struct p2p_channels)); 4918 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 4919 } 4920 4921 4922 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 4923 const u8 *src, const u8 *bssid, const u8 *buf, 4924 size_t len, unsigned int wait_time) 4925 { 4926 if (p2p->p2p_scan_running) { 4927 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes"); 4928 if (p2p->after_scan_tx) { 4929 p2p_dbg(p2p, "Dropped previous pending Action frame TX"); 4930 os_free(p2p->after_scan_tx); 4931 } 4932 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) + 4933 len); 4934 if (p2p->after_scan_tx == NULL) 4935 return -1; 4936 p2p->after_scan_tx->freq = freq; 4937 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN); 4938 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN); 4939 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN); 4940 p2p->after_scan_tx->len = len; 4941 p2p->after_scan_tx->wait_time = wait_time; 4942 os_memcpy(p2p->after_scan_tx + 1, buf, len); 4943 return 0; 4944 } 4945 4946 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid, 4947 buf, len, wait_time); 4948 } 4949 4950 4951 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5, 4952 int freq_overall) 4953 { 4954 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d", 4955 freq_24, freq_5, freq_overall); 4956 p2p->best_freq_24 = freq_24; 4957 p2p->best_freq_5 = freq_5; 4958 p2p->best_freq_overall = freq_overall; 4959 } 4960 4961 4962 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq) 4963 { 4964 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq); 4965 p2p->own_freq_preference = freq; 4966 } 4967 4968 4969 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p) 4970 { 4971 if (p2p == NULL || p2p->go_neg_peer == NULL) 4972 return NULL; 4973 return p2p->go_neg_peer->info.p2p_device_addr; 4974 } 4975 4976 4977 const struct p2p_peer_info * 4978 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next) 4979 { 4980 struct p2p_device *dev; 4981 4982 if (addr) { 4983 dev = p2p_get_device(p2p, addr); 4984 if (!dev) 4985 return NULL; 4986 4987 if (!next) { 4988 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 4989 return NULL; 4990 4991 return &dev->info; 4992 } else { 4993 do { 4994 dev = dl_list_first(&dev->list, 4995 struct p2p_device, 4996 list); 4997 if (!dev || &dev->list == &p2p->devices) 4998 return NULL; 4999 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY); 5000 } 5001 } else { 5002 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 5003 if (!dev) 5004 return NULL; 5005 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 5006 dev = dl_list_first(&dev->list, 5007 struct p2p_device, 5008 list); 5009 if (!dev || &dev->list == &p2p->devices) 5010 return NULL; 5011 } 5012 } 5013 5014 return &dev->info; 5015 } 5016 5017 5018 int p2p_in_progress(struct p2p_data *p2p) 5019 { 5020 if (p2p == NULL) 5021 return 0; 5022 if (p2p->state == P2P_SEARCH) 5023 return 2; 5024 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING; 5025 } 5026 5027 5028 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout, 5029 u8 client_timeout) 5030 { 5031 if (p2p) { 5032 p2p->go_timeout = go_timeout; 5033 p2p->client_timeout = client_timeout; 5034 } 5035 } 5036 5037 5038 #ifdef CONFIG_WIFI_DISPLAY 5039 5040 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p) 5041 { 5042 size_t g; 5043 struct p2p_group *group; 5044 5045 for (g = 0; g < p2p->num_groups; g++) { 5046 group = p2p->groups[g]; 5047 p2p_group_force_beacon_update_ies(group); 5048 } 5049 } 5050 5051 5052 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie) 5053 { 5054 wpabuf_free(p2p->wfd_ie_beacon); 5055 p2p->wfd_ie_beacon = ie; 5056 p2p_update_wfd_ie_groups(p2p); 5057 return 0; 5058 } 5059 5060 5061 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie) 5062 { 5063 wpabuf_free(p2p->wfd_ie_probe_req); 5064 p2p->wfd_ie_probe_req = ie; 5065 return 0; 5066 } 5067 5068 5069 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie) 5070 { 5071 wpabuf_free(p2p->wfd_ie_probe_resp); 5072 p2p->wfd_ie_probe_resp = ie; 5073 p2p_update_wfd_ie_groups(p2p); 5074 return 0; 5075 } 5076 5077 5078 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie) 5079 { 5080 wpabuf_free(p2p->wfd_ie_assoc_req); 5081 p2p->wfd_ie_assoc_req = ie; 5082 return 0; 5083 } 5084 5085 5086 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie) 5087 { 5088 wpabuf_free(p2p->wfd_ie_invitation); 5089 p2p->wfd_ie_invitation = ie; 5090 return 0; 5091 } 5092 5093 5094 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie) 5095 { 5096 wpabuf_free(p2p->wfd_ie_prov_disc_req); 5097 p2p->wfd_ie_prov_disc_req = ie; 5098 return 0; 5099 } 5100 5101 5102 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie) 5103 { 5104 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 5105 p2p->wfd_ie_prov_disc_resp = ie; 5106 return 0; 5107 } 5108 5109 5110 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie) 5111 { 5112 wpabuf_free(p2p->wfd_ie_go_neg); 5113 p2p->wfd_ie_go_neg = ie; 5114 return 0; 5115 } 5116 5117 5118 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem) 5119 { 5120 wpabuf_free(p2p->wfd_dev_info); 5121 if (elem) { 5122 p2p->wfd_dev_info = wpabuf_dup(elem); 5123 if (p2p->wfd_dev_info == NULL) 5124 return -1; 5125 } else 5126 p2p->wfd_dev_info = NULL; 5127 5128 return 0; 5129 } 5130 5131 5132 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem) 5133 { 5134 wpabuf_free(p2p->wfd_assoc_bssid); 5135 if (elem) { 5136 p2p->wfd_assoc_bssid = wpabuf_dup(elem); 5137 if (p2p->wfd_assoc_bssid == NULL) 5138 return -1; 5139 } else 5140 p2p->wfd_assoc_bssid = NULL; 5141 5142 return 0; 5143 } 5144 5145 5146 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p, 5147 const struct wpabuf *elem) 5148 { 5149 wpabuf_free(p2p->wfd_coupled_sink_info); 5150 if (elem) { 5151 p2p->wfd_coupled_sink_info = wpabuf_dup(elem); 5152 if (p2p->wfd_coupled_sink_info == NULL) 5153 return -1; 5154 } else 5155 p2p->wfd_coupled_sink_info = NULL; 5156 5157 return 0; 5158 } 5159 5160 #endif /* CONFIG_WIFI_DISPLAY */ 5161 5162 5163 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int, 5164 int max_disc_tu) 5165 { 5166 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0) 5167 return -1; 5168 5169 p2p->min_disc_int = min_disc_int; 5170 p2p->max_disc_int = max_disc_int; 5171 p2p->max_disc_tu = max_disc_tu; 5172 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d", 5173 min_disc_int, max_disc_int, max_disc_tu); 5174 5175 return 0; 5176 } 5177 5178 5179 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...) 5180 { 5181 va_list ap; 5182 char buf[500]; 5183 5184 if (!p2p->cfg->debug_print) 5185 return; 5186 5187 va_start(ap, fmt); 5188 vsnprintf(buf, sizeof(buf), fmt, ap); 5189 buf[sizeof(buf) - 1] = '\0'; 5190 va_end(ap); 5191 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf); 5192 } 5193 5194 5195 void p2p_info(struct p2p_data *p2p, const char *fmt, ...) 5196 { 5197 va_list ap; 5198 char buf[500]; 5199 5200 if (!p2p->cfg->debug_print) 5201 return; 5202 5203 va_start(ap, fmt); 5204 vsnprintf(buf, sizeof(buf), fmt, ap); 5205 buf[sizeof(buf) - 1] = '\0'; 5206 va_end(ap); 5207 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf); 5208 } 5209 5210 5211 void p2p_err(struct p2p_data *p2p, const char *fmt, ...) 5212 { 5213 va_list ap; 5214 char buf[500]; 5215 5216 if (!p2p->cfg->debug_print) 5217 return; 5218 5219 va_start(ap, fmt); 5220 vsnprintf(buf, sizeof(buf), fmt, ap); 5221 buf[sizeof(buf) - 1] = '\0'; 5222 va_end(ap); 5223 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf); 5224 } 5225 5226 5227 void p2p_loop_on_known_peers(struct p2p_data *p2p, 5228 void (*peer_callback)(struct p2p_peer_info *peer, 5229 void *user_data), 5230 void *user_data) 5231 { 5232 struct p2p_device *dev, *n; 5233 5234 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) { 5235 peer_callback(&dev->info, user_data); 5236 } 5237 } 5238 5239 5240 #ifdef CONFIG_WPS_NFC 5241 5242 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p, 5243 int client_freq, 5244 const u8 *go_dev_addr, 5245 const u8 *ssid, size_t ssid_len) 5246 { 5247 struct wpabuf *buf; 5248 u8 op_class, channel; 5249 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP; 5250 5251 buf = wpabuf_alloc(1000); 5252 if (buf == NULL) 5253 return NULL; 5254 5255 op_class = p2p->cfg->reg_class; 5256 channel = p2p->cfg->channel; 5257 5258 p2p_buf_add_capability(buf, p2p->dev_capab & 5259 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 5260 p2p_buf_add_device_info(buf, p2p, NULL); 5261 5262 if (p2p->num_groups > 0) { 5263 int freq = p2p_group_get_freq(p2p->groups[0]); 5264 role = P2P_GO_IN_A_GROUP; 5265 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) { 5266 p2p_dbg(p2p, 5267 "Unknown GO operating frequency %d MHz for NFC handover", 5268 freq); 5269 wpabuf_free(buf); 5270 return NULL; 5271 } 5272 } else if (client_freq > 0) { 5273 role = P2P_CLIENT_IN_A_GROUP; 5274 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) { 5275 p2p_dbg(p2p, 5276 "Unknown client operating frequency %d MHz for NFC handover", 5277 client_freq); 5278 wpabuf_free(buf); 5279 return NULL; 5280 } 5281 } 5282 5283 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class, 5284 channel, role); 5285 5286 if (p2p->num_groups > 0) { 5287 /* Limit number of clients to avoid very long message */ 5288 p2p_buf_add_group_info(p2p->groups[0], buf, 5); 5289 p2p_group_buf_add_id(p2p->groups[0], buf); 5290 } else if (client_freq > 0 && 5291 go_dev_addr && !is_zero_ether_addr(go_dev_addr) && 5292 ssid && ssid_len > 0) { 5293 /* 5294 * Add the optional P2P Group ID to indicate in which group this 5295 * device is a P2P Client. 5296 */ 5297 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len); 5298 } 5299 5300 return buf; 5301 } 5302 5303 5304 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p, 5305 int client_freq, 5306 const u8 *go_dev_addr, 5307 const u8 *ssid, size_t ssid_len) 5308 { 5309 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 5310 ssid_len); 5311 } 5312 5313 5314 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p, 5315 int client_freq, 5316 const u8 *go_dev_addr, 5317 const u8 *ssid, size_t ssid_len) 5318 { 5319 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 5320 ssid_len); 5321 } 5322 5323 5324 int p2p_process_nfc_connection_handover(struct p2p_data *p2p, 5325 struct p2p_nfc_params *params) 5326 { 5327 struct p2p_message msg; 5328 struct p2p_device *dev; 5329 const u8 *p2p_dev_addr; 5330 int freq; 5331 enum p2p_role_indication role; 5332 5333 params->next_step = NO_ACTION; 5334 5335 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len, 5336 params->p2p_attr, params->p2p_len, &msg)) { 5337 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC"); 5338 p2p_parse_free(&msg); 5339 return -1; 5340 } 5341 5342 if (msg.p2p_device_addr) 5343 p2p_dev_addr = msg.p2p_device_addr; 5344 else if (msg.device_id) 5345 p2p_dev_addr = msg.device_id; 5346 else { 5347 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 5348 p2p_parse_free(&msg); 5349 return -1; 5350 } 5351 5352 if (msg.oob_dev_password) { 5353 os_memcpy(params->oob_dev_pw, msg.oob_dev_password, 5354 msg.oob_dev_password_len); 5355 params->oob_dev_pw_len = msg.oob_dev_password_len; 5356 } 5357 5358 dev = p2p_create_device(p2p, p2p_dev_addr); 5359 if (dev == NULL) { 5360 p2p_parse_free(&msg); 5361 return -1; 5362 } 5363 5364 params->peer = &dev->info; 5365 5366 os_get_reltime(&dev->last_seen); 5367 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 5368 p2p_copy_wps_info(p2p, dev, 0, &msg); 5369 5370 if (!msg.oob_go_neg_channel) { 5371 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included"); 5372 p2p_parse_free(&msg); 5373 return -1; 5374 } 5375 5376 if (msg.oob_go_neg_channel[3] == 0 && 5377 msg.oob_go_neg_channel[4] == 0) 5378 freq = 0; 5379 else 5380 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3], 5381 msg.oob_go_neg_channel[4]); 5382 if (freq < 0) { 5383 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel"); 5384 p2p_parse_free(&msg); 5385 return -1; 5386 } 5387 role = msg.oob_go_neg_channel[5]; 5388 5389 if (role == P2P_GO_IN_A_GROUP) { 5390 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq); 5391 params->go_freq = freq; 5392 } else if (role == P2P_CLIENT_IN_A_GROUP) { 5393 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz", 5394 freq); 5395 params->go_freq = freq; 5396 } else 5397 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq); 5398 dev->oob_go_neg_freq = freq; 5399 5400 if (!params->sel && role != P2P_GO_IN_A_GROUP) { 5401 freq = p2p_channel_to_freq(p2p->cfg->reg_class, 5402 p2p->cfg->channel); 5403 if (freq < 0) { 5404 p2p_dbg(p2p, "Own listen channel not known"); 5405 p2p_parse_free(&msg); 5406 return -1; 5407 } 5408 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq); 5409 dev->oob_go_neg_freq = freq; 5410 } 5411 5412 if (msg.group_id) { 5413 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN); 5414 params->go_ssid_len = msg.group_id_len - ETH_ALEN; 5415 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN, 5416 params->go_ssid_len); 5417 } 5418 5419 if (dev->flags & P2P_DEV_USER_REJECTED) { 5420 p2p_dbg(p2p, "Do not report rejected device"); 5421 p2p_parse_free(&msg); 5422 return 0; 5423 } 5424 5425 if (!(dev->flags & P2P_DEV_REPORTED)) { 5426 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info, 5427 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 5428 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 5429 } 5430 p2p_parse_free(&msg); 5431 5432 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0) 5433 params->next_step = BOTH_GO; 5434 else if (role == P2P_GO_IN_A_GROUP) 5435 params->next_step = JOIN_GROUP; 5436 else if (role == P2P_CLIENT_IN_A_GROUP) { 5437 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 5438 params->next_step = PEER_CLIENT; 5439 } else if (p2p->num_groups > 0) 5440 params->next_step = AUTH_JOIN; 5441 else if (params->sel) 5442 params->next_step = INIT_GO_NEG; 5443 else 5444 params->next_step = RESP_GO_NEG; 5445 5446 return 0; 5447 } 5448 5449 5450 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id, 5451 int go_intent, 5452 const u8 *own_interface_addr) 5453 { 5454 5455 p2p->authorized_oob_dev_pw_id = dev_pw_id; 5456 if (dev_pw_id == 0) { 5457 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover"); 5458 return; 5459 } 5460 5461 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover", 5462 dev_pw_id); 5463 5464 p2p->go_intent = go_intent; 5465 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 5466 } 5467 5468 #endif /* CONFIG_WPS_NFC */ 5469 5470 5471 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len) 5472 { 5473 if (len < 8 || len > 63) 5474 return -1; 5475 p2p->cfg->passphrase_len = len; 5476 return 0; 5477 } 5478 5479 5480 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem) 5481 { 5482 p2p->vendor_elem = vendor_elem; 5483 } 5484 5485 5486 void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx) 5487 { 5488 struct p2p_data *p2p = eloop_ctx; 5489 5490 p2p_dbg(p2p, 5491 "Timeout on waiting peer to become ready for GO Negotiation"); 5492 p2p_go_neg_failed(p2p, -1); 5493 } 5494 5495 5496 void p2p_set_own_pref_freq_list(struct p2p_data *p2p, 5497 const unsigned int *pref_freq_list, 5498 unsigned int size) 5499 { 5500 unsigned int i; 5501 5502 if (size > P2P_MAX_PREF_CHANNELS) 5503 size = P2P_MAX_PREF_CHANNELS; 5504 p2p->num_pref_freq = size; 5505 for (i = 0; i < size; i++) { 5506 p2p->pref_freq_list[i] = pref_freq_list[i]; 5507 p2p_dbg(p2p, "Own preferred frequency list[%u]=%u MHz", 5508 i, p2p->pref_freq_list[i]); 5509 } 5510 } 5511 5512 5513 struct wpabuf * p2p_build_probe_resp_template(struct p2p_data *p2p, 5514 unsigned int freq) 5515 { 5516 struct wpabuf *ies, *buf; 5517 u8 addr[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 5518 int ret; 5519 5520 ies = p2p_build_probe_resp_ies(p2p, NULL, 0); 5521 if (!ies) { 5522 wpa_printf(MSG_ERROR, 5523 "CTRL: Failed to build Probe Response IEs"); 5524 return NULL; 5525 } 5526 5527 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 5528 if (!buf) { 5529 wpabuf_free(ies); 5530 return NULL; 5531 } 5532 5533 ret = p2p_build_probe_resp_buf(p2p, buf, ies, addr, freq); 5534 wpabuf_free(ies); 5535 if (ret) { 5536 wpabuf_free(buf); 5537 return NULL; 5538 } 5539 5540 return buf; 5541 } 5542