p2p.c revision 293335998d38c497293b1c41f7ad8342b507d458
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 24static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx); 25static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev); 26static 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); 29static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 30 const u8 *sa, const u8 *data, 31 size_t len); 32static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx); 33static 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 53void 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 106static 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 141const char * p2p_get_state_txt(struct p2p_data *p2p) 142{ 143 return p2p_state_txt(p2p->state); 144} 145 146 147struct p2ps_advertisement * p2p_get_p2ps_adv_list(struct p2p_data *p2p) 148{ 149 return p2p ? p2p->p2ps_adv_list : NULL; 150} 151 152 153void 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 160u16 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 175void 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 188void 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 204void 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 213void 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 220void 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 253static 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 308int 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 360static 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 */ 376struct 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 */ 393struct 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 */ 414static 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 446static 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 461static 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 543static 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 630static 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 670static 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 */ 706int 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 dev_name_changed; 715 int i; 716 struct os_reltime time_now; 717 718 os_memset(&msg, 0, sizeof(msg)); 719 if (p2p_parse_ies(ies, ies_len, &msg)) { 720 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry"); 721 p2p_parse_free(&msg); 722 return -1; 723 } 724 725 if (msg.p2p_device_addr) 726 p2p_dev_addr = msg.p2p_device_addr; 727 else if (msg.device_id) 728 p2p_dev_addr = msg.device_id; 729 else { 730 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 731 p2p_parse_free(&msg); 732 return -1; 733 } 734 735 if (!is_zero_ether_addr(p2p->peer_filter) && 736 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) { 737 p2p_dbg(p2p, "Do not add peer filter for " MACSTR 738 " due to peer filter", MAC2STR(p2p_dev_addr)); 739 p2p_parse_free(&msg); 740 return 0; 741 } 742 743 dev = p2p_create_device(p2p, p2p_dev_addr); 744 if (dev == NULL) { 745 p2p_parse_free(&msg); 746 return -1; 747 } 748 749 if (rx_time == NULL) { 750 os_get_reltime(&time_now); 751 rx_time = &time_now; 752 } 753 754 /* 755 * Update the device entry only if the new peer 756 * entry is newer than the one previously stored, or if 757 * the device was previously seen as a P2P Client in a group 758 * and the new entry isn't older than a threshold. 759 */ 760 if (dev->last_seen.sec > 0 && 761 os_reltime_before(rx_time, &dev->last_seen) && 762 (!(dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT) || 763 os_reltime_expired(&dev->last_seen, rx_time, 764 P2P_DEV_GROUP_CLIENT_RESP_THRESHOLD))) { 765 p2p_dbg(p2p, 766 "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u flags=0x%x)", 767 (unsigned int) rx_time->sec, 768 (unsigned int) rx_time->usec, 769 (unsigned int) dev->last_seen.sec, 770 (unsigned int) dev->last_seen.usec, 771 dev->flags); 772 p2p_parse_free(&msg); 773 return -1; 774 } 775 776 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime)); 777 778 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY | 779 P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT); 780 781 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0) 782 os_memcpy(dev->interface_addr, addr, ETH_ALEN); 783 if (msg.ssid && 784 msg.ssid[1] <= sizeof(dev->oper_ssid) && 785 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 786 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 787 != 0)) { 788 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]); 789 dev->oper_ssid_len = msg.ssid[1]; 790 } 791 792 wpabuf_free(dev->info.p2ps_instance); 793 dev->info.p2ps_instance = NULL; 794 if (msg.adv_service_instance && msg.adv_service_instance_len) 795 dev->info.p2ps_instance = wpabuf_alloc_copy( 796 msg.adv_service_instance, msg.adv_service_instance_len); 797 798 if (freq >= 2412 && freq <= 2484 && msg.ds_params && 799 *msg.ds_params >= 1 && *msg.ds_params <= 14) { 800 int ds_freq; 801 if (*msg.ds_params == 14) 802 ds_freq = 2484; 803 else 804 ds_freq = 2407 + *msg.ds_params * 5; 805 if (freq != ds_freq) { 806 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz", 807 freq, ds_freq); 808 freq = ds_freq; 809 } 810 } 811 812 if (dev->listen_freq && dev->listen_freq != freq && scan_res) { 813 p2p_dbg(p2p, "Update Listen frequency based on scan results (" 814 MACSTR " %d -> %d MHz (DS param %d)", 815 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq, 816 freq, msg.ds_params ? *msg.ds_params : -1); 817 } 818 if (scan_res) { 819 dev->listen_freq = freq; 820 if (msg.group_info) 821 dev->oper_freq = freq; 822 } 823 dev->info.level = level; 824 825 dev_name_changed = os_strncmp(dev->info.device_name, msg.device_name, 826 WPS_DEV_NAME_MAX_LEN) != 0; 827 828 p2p_copy_wps_info(p2p, dev, 0, &msg); 829 830 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 831 wpabuf_free(dev->info.wps_vendor_ext[i]); 832 dev->info.wps_vendor_ext[i] = NULL; 833 } 834 835 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 836 if (msg.wps_vendor_ext[i] == NULL) 837 break; 838 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy( 839 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]); 840 if (dev->info.wps_vendor_ext[i] == NULL) 841 break; 842 } 843 844 wfd_changed = p2p_compare_wfd_info(dev, &msg); 845 846 if (wfd_changed) { 847 wpabuf_free(dev->info.wfd_subelems); 848 if (msg.wfd_subelems) 849 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 850 else 851 dev->info.wfd_subelems = NULL; 852 } 853 854 if (scan_res) { 855 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq, 856 msg.group_info, msg.group_info_len, 857 rx_time); 858 } 859 860 p2p_parse_free(&msg); 861 862 p2p_update_peer_vendor_elems(dev, ies, ies_len); 863 864 if (dev->flags & P2P_DEV_REPORTED && !wfd_changed && 865 !dev_name_changed && 866 (!msg.adv_service_instance || 867 (dev->flags & P2P_DEV_P2PS_REPORTED))) 868 return 0; 869 870 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)", 871 freq, (unsigned int) rx_time->sec, 872 (unsigned int) rx_time->usec); 873 if (dev->flags & P2P_DEV_USER_REJECTED) { 874 p2p_dbg(p2p, "Do not report rejected device"); 875 return 0; 876 } 877 878 if (dev->info.config_methods == 0 && 879 (freq == 2412 || freq == 2437 || freq == 2462)) { 880 /* 881 * If we have only seen a Beacon frame from a GO, we do not yet 882 * know what WPS config methods it supports. Since some 883 * applications use config_methods value from P2P-DEVICE-FOUND 884 * events, postpone reporting this peer until we've fully 885 * discovered its capabilities. 886 * 887 * At least for now, do this only if the peer was detected on 888 * one of the social channels since that peer can be easily be 889 * found again and there are no limitations of having to use 890 * passive scan on this channels, so this can be done through 891 * Probe Response frame that includes the config_methods 892 * information. 893 */ 894 p2p_dbg(p2p, "Do not report peer " MACSTR 895 " with unknown config methods", MAC2STR(addr)); 896 return 0; 897 } 898 899 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 900 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 901 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 902 903 if (msg.adv_service_instance) 904 dev->flags |= P2P_DEV_P2PS_REPORTED; 905 906 return 0; 907} 908 909 910static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev) 911{ 912 int i; 913 914 if (p2p->go_neg_peer == dev) { 915 /* 916 * If GO Negotiation is in progress, report that it has failed. 917 */ 918 p2p_go_neg_failed(p2p, -1); 919 } 920 if (p2p->invite_peer == dev) 921 p2p->invite_peer = NULL; 922 if (p2p->sd_peer == dev) 923 p2p->sd_peer = NULL; 924 if (p2p->pending_client_disc_go == dev) 925 p2p->pending_client_disc_go = NULL; 926 927 /* dev_lost() device, but only if it was previously dev_found() */ 928 if (dev->flags & P2P_DEV_REPORTED_ONCE) 929 p2p->cfg->dev_lost(p2p->cfg->cb_ctx, 930 dev->info.p2p_device_addr); 931 932 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 933 wpabuf_free(dev->info.wps_vendor_ext[i]); 934 dev->info.wps_vendor_ext[i] = NULL; 935 } 936 937 wpabuf_free(dev->info.wfd_subelems); 938 wpabuf_free(dev->info.vendor_elems); 939 wpabuf_free(dev->go_neg_conf); 940 wpabuf_free(dev->info.p2ps_instance); 941 942 os_free(dev); 943} 944 945 946static int p2p_get_next_prog_freq(struct p2p_data *p2p) 947{ 948 struct p2p_channels *c; 949 struct p2p_reg_class *cla; 950 size_t cl, ch; 951 int found = 0; 952 u8 reg_class; 953 u8 channel; 954 int freq; 955 956 c = &p2p->cfg->channels; 957 for (cl = 0; cl < c->reg_classes; cl++) { 958 cla = &c->reg_class[cl]; 959 if (cla->reg_class != p2p->last_prog_scan_class) 960 continue; 961 for (ch = 0; ch < cla->channels; ch++) { 962 if (cla->channel[ch] == p2p->last_prog_scan_chan) { 963 found = 1; 964 break; 965 } 966 } 967 if (found) 968 break; 969 } 970 971 if (!found) { 972 /* Start from beginning */ 973 reg_class = c->reg_class[0].reg_class; 974 channel = c->reg_class[0].channel[0]; 975 } else { 976 /* Pick the next channel */ 977 ch++; 978 if (ch == cla->channels) { 979 cl++; 980 if (cl == c->reg_classes) 981 cl = 0; 982 ch = 0; 983 } 984 reg_class = c->reg_class[cl].reg_class; 985 channel = c->reg_class[cl].channel[ch]; 986 } 987 988 freq = p2p_channel_to_freq(reg_class, channel); 989 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz", 990 reg_class, channel, freq); 991 p2p->last_prog_scan_class = reg_class; 992 p2p->last_prog_scan_chan = channel; 993 994 if (freq == 2412 || freq == 2437 || freq == 2462) 995 return 0; /* No need to add social channels */ 996 return freq; 997} 998 999 1000static void p2p_search(struct p2p_data *p2p) 1001{ 1002 int freq = 0; 1003 enum p2p_scan_type type; 1004 u16 pw_id = DEV_PW_DEFAULT; 1005 int res; 1006 1007 if (p2p->drv_in_listen) { 1008 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing"); 1009 return; 1010 } 1011 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1012 1013 if (p2p->find_type == P2P_FIND_PROGRESSIVE && 1014 (freq = p2p_get_next_prog_freq(p2p)) > 0) { 1015 type = P2P_SCAN_SOCIAL_PLUS_ONE; 1016 p2p_dbg(p2p, "Starting search (+ freq %u)", freq); 1017 } else { 1018 type = P2P_SCAN_SOCIAL; 1019 p2p_dbg(p2p, "Starting search"); 1020 } 1021 1022 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq, 1023 p2p->num_req_dev_types, p2p->req_dev_types, 1024 p2p->find_dev_id, pw_id); 1025 if (res < 0) { 1026 p2p_dbg(p2p, "Scan request schedule failed"); 1027 p2p_continue_find(p2p); 1028 } 1029} 1030 1031 1032static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx) 1033{ 1034 struct p2p_data *p2p = eloop_ctx; 1035 p2p_dbg(p2p, "Find timeout -> stop"); 1036 p2p_stop_find(p2p); 1037} 1038 1039 1040void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status) 1041{ 1042 if (status != 0) { 1043 p2p_dbg(p2p, "Scan request failed"); 1044 /* Do continue find even for the first p2p_find_scan */ 1045 p2p_continue_find(p2p); 1046 } else { 1047 p2p_dbg(p2p, "Running p2p_scan"); 1048 p2p->p2p_scan_running = 1; 1049 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 1050 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 1051 p2p, NULL); 1052 } 1053} 1054 1055 1056static int p2p_run_after_scan(struct p2p_data *p2p) 1057{ 1058 struct p2p_device *dev; 1059 enum p2p_after_scan op; 1060 1061 if (p2p->after_scan_tx) { 1062 p2p->after_scan_tx_in_progress = 1; 1063 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion"); 1064 p2p->cfg->send_action(p2p->cfg->cb_ctx, 1065 p2p->after_scan_tx->freq, 1066 p2p->after_scan_tx->dst, 1067 p2p->after_scan_tx->src, 1068 p2p->after_scan_tx->bssid, 1069 (u8 *) (p2p->after_scan_tx + 1), 1070 p2p->after_scan_tx->len, 1071 p2p->after_scan_tx->wait_time); 1072 os_free(p2p->after_scan_tx); 1073 p2p->after_scan_tx = NULL; 1074 return 1; 1075 } 1076 1077 op = p2p->start_after_scan; 1078 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1079 switch (op) { 1080 case P2P_AFTER_SCAN_NOTHING: 1081 break; 1082 case P2P_AFTER_SCAN_LISTEN: 1083 p2p_dbg(p2p, "Start previously requested Listen state"); 1084 p2p_listen(p2p, p2p->pending_listen_sec * 1000 + 1085 p2p->pending_listen_usec / 1000); 1086 return 1; 1087 case P2P_AFTER_SCAN_CONNECT: 1088 p2p_dbg(p2p, "Start previously requested connect with " MACSTR, 1089 MAC2STR(p2p->after_scan_peer)); 1090 dev = p2p_get_device(p2p, p2p->after_scan_peer); 1091 if (dev == NULL) { 1092 p2p_dbg(p2p, "Peer not known anymore"); 1093 break; 1094 } 1095 p2p_connect_send(p2p, dev); 1096 return 1; 1097 } 1098 1099 return 0; 1100} 1101 1102 1103static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx) 1104{ 1105 struct p2p_data *p2p = eloop_ctx; 1106 int running; 1107 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running); 1108 running = p2p->p2p_scan_running; 1109 /* Make sure we recover from missed scan results callback */ 1110 p2p->p2p_scan_running = 0; 1111 1112 if (running) 1113 p2p_run_after_scan(p2p); 1114} 1115 1116 1117static void p2p_free_req_dev_types(struct p2p_data *p2p) 1118{ 1119 p2p->num_req_dev_types = 0; 1120 os_free(p2p->req_dev_types); 1121 p2p->req_dev_types = NULL; 1122} 1123 1124 1125static int p2ps_gen_hash(struct p2p_data *p2p, const char *str, u8 *hash) 1126{ 1127 u8 buf[SHA256_MAC_LEN]; 1128 char str_buf[256]; 1129 const u8 *adv_array; 1130 size_t i, adv_len; 1131 1132 if (!str || !hash) 1133 return 0; 1134 1135 if (!str[0]) { 1136 os_memcpy(hash, p2p->wild_card_hash, P2PS_HASH_LEN); 1137 return 1; 1138 } 1139 1140 adv_array = (u8 *) str_buf; 1141 adv_len = os_strlen(str); 1142 if (adv_len >= sizeof(str_buf)) 1143 return 0; 1144 1145 for (i = 0; i < adv_len; i++) { 1146 if (str[i] >= 'A' && str[i] <= 'Z') 1147 str_buf[i] = str[i] - 'A' + 'a'; 1148 else 1149 str_buf[i] = str[i]; 1150 } 1151 1152 if (sha256_vector(1, &adv_array, &adv_len, buf)) 1153 return 0; 1154 1155 os_memcpy(hash, buf, P2PS_HASH_LEN); 1156 return 1; 1157} 1158 1159 1160int p2p_find(struct p2p_data *p2p, unsigned int timeout, 1161 enum p2p_discovery_type type, 1162 unsigned int num_req_dev_types, const u8 *req_dev_types, 1163 const u8 *dev_id, unsigned int search_delay, 1164 u8 seek_count, const char **seek, int freq) 1165{ 1166 int res; 1167 1168 p2p_dbg(p2p, "Starting find (type=%d)", type); 1169 os_get_reltime(&p2p->find_start); 1170 if (p2p->p2p_scan_running) { 1171 p2p_dbg(p2p, "p2p_scan is already running"); 1172 } 1173 1174 p2p_free_req_dev_types(p2p); 1175 if (req_dev_types && num_req_dev_types) { 1176 p2p->req_dev_types = os_malloc(num_req_dev_types * 1177 WPS_DEV_TYPE_LEN); 1178 if (p2p->req_dev_types == NULL) 1179 return -1; 1180 os_memcpy(p2p->req_dev_types, req_dev_types, 1181 num_req_dev_types * WPS_DEV_TYPE_LEN); 1182 p2p->num_req_dev_types = num_req_dev_types; 1183 } 1184 1185 if (dev_id) { 1186 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN); 1187 p2p->find_dev_id = p2p->find_dev_id_buf; 1188 } else 1189 p2p->find_dev_id = NULL; 1190 1191 if (seek_count == 0 || !seek) { 1192 /* Not an ASP search */ 1193 p2p->p2ps_seek = 0; 1194 } else if (seek_count == 1 && seek && (!seek[0] || !seek[0][0])) { 1195 /* 1196 * An empty seek string means no hash values, but still an ASP 1197 * search. 1198 */ 1199 p2p_dbg(p2p, "ASP search"); 1200 p2p->p2ps_seek_count = 0; 1201 p2p->p2ps_seek = 1; 1202 } else if (seek && seek_count <= P2P_MAX_QUERY_HASH) { 1203 u8 buf[P2PS_HASH_LEN]; 1204 int i, count = 0; 1205 1206 for (i = 0; i < seek_count; i++) { 1207 if (!p2ps_gen_hash(p2p, seek[i], buf)) 1208 continue; 1209 1210 p2p_dbg(p2p, "Seek service %s hash " MACSTR, 1211 seek[i], MAC2STR(buf)); 1212 os_memcpy(&p2p->p2ps_seek_hash[count * P2PS_HASH_LEN], 1213 buf, P2PS_HASH_LEN); 1214 count++; 1215 } 1216 1217 p2p->p2ps_seek_count = count; 1218 p2p->p2ps_seek = 1; 1219 } else { 1220 p2p->p2ps_seek_count = 0; 1221 p2p->p2ps_seek = 1; 1222 } 1223 1224 /* Special case to perform wildcard search */ 1225 if (p2p->p2ps_seek_count == 0 && p2p->p2ps_seek) { 1226 p2p->p2ps_seek_count = 1; 1227 os_memcpy(&p2p->p2ps_seek_hash, p2p->wild_card_hash, 1228 P2PS_HASH_LEN); 1229 } 1230 1231 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1232 p2p_clear_timeout(p2p); 1233 if (p2p->pending_listen_freq) { 1234 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_find"); 1235 p2p->pending_listen_freq = 0; 1236 } 1237 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1238 p2p->find_type = type; 1239 p2p_device_clear_reported(p2p); 1240 os_memset(p2p->sd_query_no_ack, 0, ETH_ALEN); 1241 p2p_set_state(p2p, P2P_SEARCH); 1242 p2p->search_delay = search_delay; 1243 p2p->in_search_delay = 0; 1244 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1245 p2p->last_p2p_find_timeout = timeout; 1246 if (timeout) 1247 eloop_register_timeout(timeout, 0, p2p_find_timeout, 1248 p2p, NULL); 1249 switch (type) { 1250 case P2P_FIND_START_WITH_FULL: 1251 if (freq > 0) { 1252 /* 1253 * Start with the specified channel and then move to 1254 * social channels only scans. 1255 */ 1256 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, 1257 P2P_SCAN_SPECIFIC, freq, 1258 p2p->num_req_dev_types, 1259 p2p->req_dev_types, dev_id, 1260 DEV_PW_DEFAULT); 1261 break; 1262 } 1263 /* fall through */ 1264 case P2P_FIND_PROGRESSIVE: 1265 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0, 1266 p2p->num_req_dev_types, 1267 p2p->req_dev_types, dev_id, 1268 DEV_PW_DEFAULT); 1269 break; 1270 case P2P_FIND_ONLY_SOCIAL: 1271 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0, 1272 p2p->num_req_dev_types, 1273 p2p->req_dev_types, dev_id, 1274 DEV_PW_DEFAULT); 1275 break; 1276 default: 1277 return -1; 1278 } 1279 1280 if (res != 0 && p2p->p2p_scan_running) { 1281 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running"); 1282 /* wait for the previous p2p_scan to complete */ 1283 res = 0; /* do not report failure */ 1284 } else if (res != 0) { 1285 p2p_dbg(p2p, "Failed to start p2p_scan"); 1286 p2p_set_state(p2p, P2P_IDLE); 1287 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1288 } 1289 1290 return res; 1291} 1292 1293 1294void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq) 1295{ 1296 p2p_dbg(p2p, "Stopping find"); 1297 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1298 p2p_clear_timeout(p2p); 1299 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND) 1300 p2p->cfg->find_stopped(p2p->cfg->cb_ctx); 1301 1302 p2p->p2ps_seek_count = 0; 1303 1304 p2p_set_state(p2p, P2P_IDLE); 1305 p2p_free_req_dev_types(p2p); 1306 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1307 if (p2p->go_neg_peer) 1308 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1309 p2p->go_neg_peer = NULL; 1310 p2p->sd_peer = NULL; 1311 p2p->invite_peer = NULL; 1312 p2p_stop_listen_for_freq(p2p, freq); 1313 p2p->send_action_in_progress = 0; 1314} 1315 1316 1317void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq) 1318{ 1319 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) { 1320 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response"); 1321 return; 1322 } 1323 if (p2p->in_listen) { 1324 p2p->in_listen = 0; 1325 p2p_clear_timeout(p2p); 1326 } 1327 if (p2p->drv_in_listen) { 1328 /* 1329 * The driver may not deliver callback to p2p_listen_end() 1330 * when the operation gets canceled, so clear the internal 1331 * variable that is tracking driver state. 1332 */ 1333 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen); 1334 p2p->drv_in_listen = 0; 1335 } 1336 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1337} 1338 1339 1340void p2p_stop_listen(struct p2p_data *p2p) 1341{ 1342 if (p2p->state != P2P_LISTEN_ONLY) { 1343 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state."); 1344 return; 1345 } 1346 1347 p2p_stop_listen_for_freq(p2p, 0); 1348 p2p_set_state(p2p, P2P_IDLE); 1349} 1350 1351 1352void p2p_stop_find(struct p2p_data *p2p) 1353{ 1354 p2p->pending_listen_freq = 0; 1355 p2p_stop_find_for_freq(p2p, 0); 1356} 1357 1358 1359static int p2p_prepare_channel_pref(struct p2p_data *p2p, 1360 unsigned int force_freq, 1361 unsigned int pref_freq, int go) 1362{ 1363 u8 op_class, op_channel; 1364 unsigned int freq = force_freq ? force_freq : pref_freq; 1365 1366 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d", 1367 force_freq, pref_freq, go); 1368 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) { 1369 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq); 1370 return -1; 1371 } 1372 1373 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) && 1374 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class, 1375 op_channel))) { 1376 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P", 1377 freq, op_class, op_channel); 1378 return -1; 1379 } 1380 1381 p2p->op_reg_class = op_class; 1382 p2p->op_channel = op_channel; 1383 1384 if (force_freq) { 1385 p2p->channels.reg_classes = 1; 1386 p2p->channels.reg_class[0].channels = 1; 1387 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 1388 p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 1389 } else { 1390 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1391 sizeof(struct p2p_channels)); 1392 } 1393 1394 return 0; 1395} 1396 1397 1398static void p2p_prepare_channel_best(struct p2p_data *p2p) 1399{ 1400 u8 op_class, op_channel; 1401 const int op_classes_5ghz[] = { 124, 125, 115, 0 }; 1402 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 }; 1403 const int op_classes_vht[] = { 128, 0 }; 1404 1405 p2p_dbg(p2p, "Prepare channel best"); 1406 1407 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 && 1408 p2p_supported_freq(p2p, p2p->best_freq_overall) && 1409 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel) 1410 == 0) { 1411 p2p_dbg(p2p, "Select best overall channel as operating channel preference"); 1412 p2p->op_reg_class = op_class; 1413 p2p->op_channel = op_channel; 1414 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 && 1415 p2p_supported_freq(p2p, p2p->best_freq_5) && 1416 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel) 1417 == 0) { 1418 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference"); 1419 p2p->op_reg_class = op_class; 1420 p2p->op_channel = op_channel; 1421 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 && 1422 p2p_supported_freq(p2p, p2p->best_freq_24) && 1423 p2p_freq_to_channel(p2p->best_freq_24, &op_class, 1424 &op_channel) == 0) { 1425 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference"); 1426 p2p->op_reg_class = op_class; 1427 p2p->op_channel = op_channel; 1428 } else if (p2p->cfg->num_pref_chan > 0 && 1429 p2p_channels_includes(&p2p->cfg->channels, 1430 p2p->cfg->pref_chan[0].op_class, 1431 p2p->cfg->pref_chan[0].chan)) { 1432 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference"); 1433 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class; 1434 p2p->op_channel = p2p->cfg->pref_chan[0].chan; 1435 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht, 1436 &p2p->op_reg_class, &p2p->op_channel) == 1437 0) { 1438 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference", 1439 p2p->op_reg_class, p2p->op_channel); 1440 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40, 1441 &p2p->op_reg_class, &p2p->op_channel) == 1442 0) { 1443 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference", 1444 p2p->op_reg_class, p2p->op_channel); 1445 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz, 1446 &p2p->op_reg_class, &p2p->op_channel) == 1447 0) { 1448 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference", 1449 p2p->op_reg_class, p2p->op_channel); 1450 } else if (p2p_channels_includes(&p2p->cfg->channels, 1451 p2p->cfg->op_reg_class, 1452 p2p->cfg->op_channel)) { 1453 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference"); 1454 p2p->op_reg_class = p2p->cfg->op_reg_class; 1455 p2p->op_channel = p2p->cfg->op_channel; 1456 } else if (p2p_channel_random_social(&p2p->cfg->channels, 1457 &p2p->op_reg_class, 1458 &p2p->op_channel) == 0) { 1459 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference", 1460 p2p->op_reg_class, p2p->op_channel); 1461 } else { 1462 /* Select any random available channel from the first available 1463 * operating class */ 1464 p2p_channel_select(&p2p->cfg->channels, NULL, 1465 &p2p->op_reg_class, 1466 &p2p->op_channel); 1467 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference", 1468 p2p->op_channel, p2p->op_reg_class); 1469 } 1470 1471 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1472 sizeof(struct p2p_channels)); 1473} 1474 1475 1476/** 1477 * p2p_prepare_channel - Select operating channel for GO Negotiation or P2PS PD 1478 * @p2p: P2P module context from p2p_init() 1479 * @dev: Selected peer device 1480 * @force_freq: Forced frequency in MHz or 0 if not forced 1481 * @pref_freq: Preferred frequency in MHz or 0 if no preference 1482 * @go: Whether the local end will be forced to be GO 1483 * Returns: 0 on success, -1 on failure (channel not supported for P2P) 1484 * 1485 * This function is used to do initial operating channel selection for GO 1486 * Negotiation prior to having received peer information or for P2PS PD 1487 * signalling. The selected channel may be further optimized in 1488 * p2p_reselect_channel() once the peer information is available. 1489 */ 1490int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev, 1491 unsigned int force_freq, unsigned int pref_freq, int go) 1492{ 1493 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d", 1494 force_freq, pref_freq, go); 1495 if (force_freq || pref_freq) { 1496 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) < 1497 0) 1498 return -1; 1499 } else { 1500 p2p_prepare_channel_best(p2p); 1501 } 1502 p2p_channels_dump(p2p, "prepared channels", &p2p->channels); 1503 if (go) 1504 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq); 1505 else if (!force_freq) 1506 p2p_channels_union_inplace(&p2p->channels, 1507 &p2p->cfg->cli_channels); 1508 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels); 1509 1510 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s", 1511 p2p->op_reg_class, p2p->op_channel, 1512 force_freq ? " (forced)" : ""); 1513 1514 if (force_freq) 1515 dev->flags |= P2P_DEV_FORCE_FREQ; 1516 else 1517 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1518 1519 return 0; 1520} 1521 1522 1523static void p2p_set_dev_persistent(struct p2p_device *dev, 1524 int persistent_group) 1525{ 1526 switch (persistent_group) { 1527 case 0: 1528 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP | 1529 P2P_DEV_PREFER_PERSISTENT_RECONN); 1530 break; 1531 case 1: 1532 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP; 1533 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN; 1534 break; 1535 case 2: 1536 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP | 1537 P2P_DEV_PREFER_PERSISTENT_RECONN; 1538 break; 1539 } 1540} 1541 1542 1543int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr, 1544 enum p2p_wps_method wps_method, 1545 int go_intent, const u8 *own_interface_addr, 1546 unsigned int force_freq, int persistent_group, 1547 const u8 *force_ssid, size_t force_ssid_len, 1548 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id) 1549{ 1550 struct p2p_device *dev; 1551 1552 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR 1553 " GO Intent=%d Intended Interface Address=" MACSTR 1554 " wps_method=%d persistent_group=%d pd_before_go_neg=%d " 1555 "oob_pw_id=%u", 1556 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1557 wps_method, persistent_group, pd_before_go_neg, oob_pw_id); 1558 1559 dev = p2p_get_device(p2p, peer_addr); 1560 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 1561 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR, 1562 MAC2STR(peer_addr)); 1563 return -1; 1564 } 1565 1566 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, 1567 go_intent == 15) < 0) 1568 return -1; 1569 1570 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 1571 if (!(dev->info.dev_capab & 1572 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 1573 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1574 " that is in a group and is not discoverable", 1575 MAC2STR(peer_addr)); 1576 return -1; 1577 } 1578 if (dev->oper_freq <= 0) { 1579 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1580 " with incomplete information", 1581 MAC2STR(peer_addr)); 1582 return -1; 1583 } 1584 1585 /* 1586 * First, try to connect directly. If the peer does not 1587 * acknowledge frames, assume it is sleeping and use device 1588 * discoverability via the GO at that point. 1589 */ 1590 } 1591 1592 p2p->ssid_set = 0; 1593 if (force_ssid) { 1594 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1595 force_ssid, force_ssid_len); 1596 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1597 p2p->ssid_len = force_ssid_len; 1598 p2p->ssid_set = 1; 1599 } 1600 1601 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1602 dev->flags &= ~P2P_DEV_USER_REJECTED; 1603 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 1604 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1605 if (pd_before_go_neg) 1606 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG; 1607 else { 1608 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG; 1609 /* 1610 * Assign dialog token and tie breaker here to use the same 1611 * values in each retry within the same GO Negotiation exchange. 1612 */ 1613 dev->dialog_token++; 1614 if (dev->dialog_token == 0) 1615 dev->dialog_token = 1; 1616 dev->tie_breaker = p2p->next_tie_breaker; 1617 p2p->next_tie_breaker = !p2p->next_tie_breaker; 1618 } 1619 dev->connect_reqs = 0; 1620 dev->go_neg_req_sent = 0; 1621 dev->go_state = UNKNOWN_GO; 1622 p2p_set_dev_persistent(dev, persistent_group); 1623 p2p->go_intent = go_intent; 1624 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1625 1626 if (p2p->state != P2P_IDLE) 1627 p2p_stop_find(p2p); 1628 1629 if (p2p->after_scan_tx) { 1630 /* 1631 * We need to drop the pending frame to avoid issues with the 1632 * new GO Negotiation, e.g., when the pending frame was from a 1633 * previous attempt at starting a GO Negotiation. 1634 */ 1635 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion"); 1636 os_free(p2p->after_scan_tx); 1637 p2p->after_scan_tx = NULL; 1638 } 1639 1640 dev->wps_method = wps_method; 1641 dev->oob_pw_id = oob_pw_id; 1642 dev->status = P2P_SC_SUCCESS; 1643 1644 if (p2p->p2p_scan_running) { 1645 p2p_dbg(p2p, "p2p_scan running - delay connect send"); 1646 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT; 1647 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN); 1648 return 0; 1649 } 1650 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1651 1652 return p2p_connect_send(p2p, dev); 1653} 1654 1655 1656int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr, 1657 enum p2p_wps_method wps_method, 1658 int go_intent, const u8 *own_interface_addr, 1659 unsigned int force_freq, int persistent_group, 1660 const u8 *force_ssid, size_t force_ssid_len, 1661 unsigned int pref_freq, u16 oob_pw_id) 1662{ 1663 struct p2p_device *dev; 1664 1665 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR 1666 " GO Intent=%d Intended Interface Address=" MACSTR 1667 " wps_method=%d persistent_group=%d oob_pw_id=%u", 1668 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1669 wps_method, persistent_group, oob_pw_id); 1670 1671 dev = p2p_get_device(p2p, peer_addr); 1672 if (dev == NULL) { 1673 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR, 1674 MAC2STR(peer_addr)); 1675 return -1; 1676 } 1677 1678 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent == 1679 15) < 0) 1680 return -1; 1681 1682 p2p->ssid_set = 0; 1683 if (force_ssid) { 1684 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1685 force_ssid, force_ssid_len); 1686 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1687 p2p->ssid_len = force_ssid_len; 1688 p2p->ssid_set = 1; 1689 } 1690 1691 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1692 dev->flags &= ~P2P_DEV_USER_REJECTED; 1693 dev->go_neg_req_sent = 0; 1694 dev->go_state = UNKNOWN_GO; 1695 p2p_set_dev_persistent(dev, persistent_group); 1696 p2p->go_intent = go_intent; 1697 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1698 1699 dev->wps_method = wps_method; 1700 dev->oob_pw_id = oob_pw_id; 1701 dev->status = P2P_SC_SUCCESS; 1702 1703 return 0; 1704} 1705 1706 1707void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr, 1708 struct p2p_device *dev, struct p2p_message *msg) 1709{ 1710 os_get_reltime(&dev->last_seen); 1711 1712 p2p_copy_wps_info(p2p, dev, 0, msg); 1713 1714 if (msg->listen_channel) { 1715 int freq; 1716 freq = p2p_channel_to_freq(msg->listen_channel[3], 1717 msg->listen_channel[4]); 1718 if (freq < 0) { 1719 p2p_dbg(p2p, "Unknown peer Listen channel: " 1720 "country=%c%c(0x%02x) reg_class=%u channel=%u", 1721 msg->listen_channel[0], 1722 msg->listen_channel[1], 1723 msg->listen_channel[2], 1724 msg->listen_channel[3], 1725 msg->listen_channel[4]); 1726 } else { 1727 p2p_dbg(p2p, "Update peer " MACSTR 1728 " Listen channel: %u -> %u MHz", 1729 MAC2STR(dev->info.p2p_device_addr), 1730 dev->listen_freq, freq); 1731 dev->listen_freq = freq; 1732 } 1733 } 1734 1735 if (msg->wfd_subelems) { 1736 wpabuf_free(dev->info.wfd_subelems); 1737 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems); 1738 } 1739 1740 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 1741 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 1742 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request"); 1743 } else { 1744 p2p_dbg(p2p, "Created device entry based on GO Neg Req: " 1745 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' " 1746 "listen_freq=%d", 1747 MAC2STR(dev->info.p2p_device_addr), 1748 dev->info.dev_capab, dev->info.group_capab, 1749 dev->info.device_name, dev->listen_freq); 1750 } 1751 1752 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY; 1753 1754 if (dev->flags & P2P_DEV_USER_REJECTED) { 1755 p2p_dbg(p2p, "Do not report rejected device"); 1756 return; 1757 } 1758 1759 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 1760 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 1761 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 1762} 1763 1764 1765void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len) 1766{ 1767 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 1768 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2); 1769 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2], 1770 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len); 1771 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len; 1772} 1773 1774 1775int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params) 1776{ 1777 if (p2p->ssid_set) { 1778 os_memcpy(params->ssid, p2p->ssid, p2p->ssid_len); 1779 params->ssid_len = p2p->ssid_len; 1780 } else { 1781 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len); 1782 } 1783 p2p->ssid_set = 0; 1784 1785 p2p_random(params->passphrase, p2p->cfg->passphrase_len); 1786 return 0; 1787} 1788 1789 1790void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer) 1791{ 1792 struct p2p_go_neg_results res; 1793 int go = peer->go_state == LOCAL_GO; 1794 struct p2p_channels intersection; 1795 1796 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)", 1797 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer"); 1798 1799 os_memset(&res, 0, sizeof(res)); 1800 res.role_go = go; 1801 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 1802 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 1803 res.wps_method = peer->wps_method; 1804 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 1805 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 1806 res.persistent_group = 2; 1807 else 1808 res.persistent_group = 1; 1809 } 1810 1811 if (go) { 1812 /* Setup AP mode for WPS provisioning */ 1813 res.freq = p2p_channel_to_freq(p2p->op_reg_class, 1814 p2p->op_channel); 1815 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1816 res.ssid_len = p2p->ssid_len; 1817 p2p_random(res.passphrase, p2p->cfg->passphrase_len); 1818 } else { 1819 res.freq = peer->oper_freq; 1820 if (p2p->ssid_len) { 1821 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1822 res.ssid_len = p2p->ssid_len; 1823 } 1824 } 1825 1826 p2p_channels_dump(p2p, "own channels", &p2p->channels); 1827 p2p_channels_dump(p2p, "peer channels", &peer->channels); 1828 p2p_channels_intersect(&p2p->channels, &peer->channels, 1829 &intersection); 1830 if (go) { 1831 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq); 1832 p2p_channels_dump(p2p, "intersection after no-GO removal", 1833 &intersection); 1834 } 1835 1836 p2p_channels_to_freqs(&intersection, res.freq_list, 1837 P2P_MAX_CHANNELS); 1838 1839 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout; 1840 1841 p2p_clear_timeout(p2p); 1842 p2p->ssid_set = 0; 1843 peer->go_neg_req_sent = 0; 1844 peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1845 peer->wps_method = WPS_NOT_READY; 1846 peer->oob_pw_id = 0; 1847 wpabuf_free(peer->go_neg_conf); 1848 peer->go_neg_conf = NULL; 1849 1850 p2p_set_state(p2p, P2P_PROVISIONING); 1851 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 1852} 1853 1854 1855static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa, 1856 const u8 *data, size_t len, int rx_freq) 1857{ 1858 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa)); 1859 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len); 1860 1861 if (len < 1) 1862 return; 1863 1864 switch (data[0]) { 1865 case P2P_GO_NEG_REQ: 1866 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq); 1867 break; 1868 case P2P_GO_NEG_RESP: 1869 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq); 1870 break; 1871 case P2P_GO_NEG_CONF: 1872 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1); 1873 break; 1874 case P2P_INVITATION_REQ: 1875 p2p_process_invitation_req(p2p, sa, data + 1, len - 1, 1876 rx_freq); 1877 break; 1878 case P2P_INVITATION_RESP: 1879 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1); 1880 break; 1881 case P2P_PROV_DISC_REQ: 1882 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1883 break; 1884 case P2P_PROV_DISC_RESP: 1885 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1); 1886 break; 1887 case P2P_DEV_DISC_REQ: 1888 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1889 break; 1890 case P2P_DEV_DISC_RESP: 1891 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1); 1892 break; 1893 default: 1894 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d", 1895 data[0]); 1896 break; 1897 } 1898} 1899 1900 1901static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, 1902 const u8 *sa, const u8 *bssid, const u8 *data, 1903 size_t len, int freq) 1904{ 1905 if (len < 1) 1906 return; 1907 1908 switch (data[0]) { 1909 case WLAN_PA_VENDOR_SPECIFIC: 1910 data++; 1911 len--; 1912 if (len < 4) 1913 return; 1914 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1915 return; 1916 1917 data += 4; 1918 len -= 4; 1919 1920 p2p_rx_p2p_action(p2p, sa, data, len, freq); 1921 break; 1922 case WLAN_PA_GAS_INITIAL_REQ: 1923 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq); 1924 break; 1925 case WLAN_PA_GAS_INITIAL_RESP: 1926 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq); 1927 break; 1928 case WLAN_PA_GAS_COMEBACK_REQ: 1929 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq); 1930 break; 1931 case WLAN_PA_GAS_COMEBACK_RESP: 1932 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq); 1933 break; 1934 } 1935} 1936 1937 1938void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa, 1939 const u8 *bssid, u8 category, 1940 const u8 *data, size_t len, int freq) 1941{ 1942 if (category == WLAN_ACTION_PUBLIC) { 1943 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq); 1944 return; 1945 } 1946 1947 if (category != WLAN_ACTION_VENDOR_SPECIFIC) 1948 return; 1949 1950 if (len < 4) 1951 return; 1952 1953 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1954 return; 1955 data += 4; 1956 len -= 4; 1957 1958 /* P2P action frame */ 1959 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa)); 1960 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len); 1961 1962 if (len < 1) 1963 return; 1964 switch (data[0]) { 1965 case P2P_NOA: 1966 p2p_dbg(p2p, "Received P2P Action - Notice of Absence"); 1967 /* TODO */ 1968 break; 1969 case P2P_PRESENCE_REQ: 1970 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq); 1971 break; 1972 case P2P_PRESENCE_RESP: 1973 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1); 1974 break; 1975 case P2P_GO_DISC_REQ: 1976 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq); 1977 break; 1978 default: 1979 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]); 1980 break; 1981 } 1982} 1983 1984 1985static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx) 1986{ 1987 struct p2p_data *p2p = eloop_ctx; 1988 if (p2p->go_neg_peer == NULL) 1989 return; 1990 if (p2p->pending_listen_freq) { 1991 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start"); 1992 p2p->pending_listen_freq = 0; 1993 } 1994 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1995 p2p->go_neg_peer->status = P2P_SC_SUCCESS; 1996 /* 1997 * Set new timeout to make sure a previously set one does not expire 1998 * too quickly while waiting for the GO Negotiation to complete. 1999 */ 2000 p2p_set_timeout(p2p, 0, 500000); 2001 p2p_connect_send(p2p, p2p->go_neg_peer); 2002} 2003 2004 2005static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx) 2006{ 2007 struct p2p_data *p2p = eloop_ctx; 2008 if (p2p->invite_peer == NULL) 2009 return; 2010 if (p2p->pending_listen_freq) { 2011 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start"); 2012 p2p->pending_listen_freq = 0; 2013 } 2014 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 2015 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr, 2016 p2p->invite_dev_pw_id); 2017} 2018 2019 2020static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr, 2021 const u8 *ie, size_t ie_len) 2022{ 2023 struct p2p_message msg; 2024 struct p2p_device *dev; 2025 2026 os_memset(&msg, 0, sizeof(msg)); 2027 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL) 2028 { 2029 p2p_parse_free(&msg); 2030 return; /* not a P2P probe */ 2031 } 2032 2033 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 2034 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 2035 != 0) { 2036 /* The Probe Request is not part of P2P Device Discovery. It is 2037 * not known whether the source address of the frame is the P2P 2038 * Device Address or P2P Interface Address. Do not add a new 2039 * peer entry based on this frames. 2040 */ 2041 p2p_parse_free(&msg); 2042 return; 2043 } 2044 2045 dev = p2p_get_device(p2p, addr); 2046 if (dev) { 2047 if (msg.listen_channel) { 2048 int freq; 2049 2050 if (dev->country[0] == 0) 2051 os_memcpy(dev->country, msg.listen_channel, 3); 2052 2053 freq = p2p_channel_to_freq(msg.listen_channel[3], 2054 msg.listen_channel[4]); 2055 2056 if (freq > 0 && dev->listen_freq != freq) { 2057 p2p_dbg(p2p, 2058 "Updated peer " MACSTR " Listen channel (Probe Request): %d -> %d MHz", 2059 MAC2STR(addr), dev->listen_freq, freq); 2060 dev->listen_freq = freq; 2061 } 2062 } 2063 2064 os_get_reltime(&dev->last_seen); 2065 p2p_parse_free(&msg); 2066 return; /* already known */ 2067 } 2068 2069 dev = p2p_create_device(p2p, addr); 2070 if (dev == NULL) { 2071 p2p_parse_free(&msg); 2072 return; 2073 } 2074 2075 os_get_reltime(&dev->last_seen); 2076 dev->flags |= P2P_DEV_PROBE_REQ_ONLY; 2077 2078 if (msg.listen_channel) { 2079 os_memcpy(dev->country, msg.listen_channel, 3); 2080 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3], 2081 msg.listen_channel[4]); 2082 } 2083 2084 p2p_copy_wps_info(p2p, dev, 1, &msg); 2085 2086 if (msg.wfd_subelems) { 2087 wpabuf_free(dev->info.wfd_subelems); 2088 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 2089 } 2090 2091 p2p_parse_free(&msg); 2092 2093 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR 2094 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d", 2095 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab, 2096 dev->info.group_capab, dev->info.device_name, 2097 dev->listen_freq); 2098} 2099 2100 2101struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p, 2102 const u8 *addr, 2103 struct p2p_message *msg) 2104{ 2105 struct p2p_device *dev; 2106 2107 dev = p2p_get_device(p2p, addr); 2108 if (dev) { 2109 os_get_reltime(&dev->last_seen); 2110 return dev; /* already known */ 2111 } 2112 2113 dev = p2p_create_device(p2p, addr); 2114 if (dev == NULL) 2115 return NULL; 2116 2117 p2p_add_dev_info(p2p, addr, dev, msg); 2118 2119 return dev; 2120} 2121 2122 2123static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type) 2124{ 2125 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0) 2126 return 1; 2127 if (os_memcmp(dev_type, req_dev_type, 2) == 0 && 2128 WPA_GET_BE32(&req_dev_type[2]) == 0 && 2129 WPA_GET_BE16(&req_dev_type[6]) == 0) 2130 return 1; /* Category match with wildcard OUI/sub-category */ 2131 return 0; 2132} 2133 2134 2135int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[], 2136 size_t num_req_dev_type) 2137{ 2138 size_t i; 2139 for (i = 0; i < num_req_dev_type; i++) { 2140 if (dev_type_match(dev_type, req_dev_type[i])) 2141 return 1; 2142 } 2143 return 0; 2144} 2145 2146 2147/** 2148 * p2p_match_dev_type - Match local device type with requested type 2149 * @p2p: P2P module context from p2p_init() 2150 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) 2151 * Returns: 1 on match, 0 on mismatch 2152 * 2153 * This function can be used to match the Requested Device Type attribute in 2154 * WPS IE with the local device types for deciding whether to reply to a Probe 2155 * Request frame. 2156 */ 2157int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps) 2158{ 2159 struct wps_parse_attr attr; 2160 size_t i; 2161 2162 if (wps_parse_msg(wps, &attr)) 2163 return 1; /* assume no Requested Device Type attributes */ 2164 2165 if (attr.num_req_dev_type == 0) 2166 return 1; /* no Requested Device Type attributes -> match */ 2167 2168 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type, 2169 attr.num_req_dev_type)) 2170 return 1; /* Own Primary Device Type matches */ 2171 2172 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) { 2173 if (dev_type_list_match(p2p->cfg->sec_dev_type[i], 2174 attr.req_dev_type, 2175 attr.num_req_dev_type)) 2176 return 1; /* Own Secondary Device Type matches */ 2177 } 2178 2179 /* No matching device type found */ 2180 return 0; 2181} 2182 2183 2184struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p, 2185 const u8 *query_hash, 2186 u8 query_count) 2187{ 2188 struct wpabuf *buf; 2189 u8 *len; 2190 int pw_id = -1; 2191 size_t extra = 0; 2192 2193#ifdef CONFIG_WIFI_DISPLAY 2194 if (p2p->wfd_ie_probe_resp) 2195 extra = wpabuf_len(p2p->wfd_ie_probe_resp); 2196#endif /* CONFIG_WIFI_DISPLAY */ 2197 2198 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]) 2199 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]); 2200 2201 if (query_count) 2202 extra += MAX_SVC_ADV_IE_LEN; 2203 2204 buf = wpabuf_alloc(1000 + extra); 2205 if (buf == NULL) 2206 return NULL; 2207 2208 if (p2p->go_neg_peer) { 2209 /* Advertise immediate availability of WPS credential */ 2210 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method); 2211 } 2212 2213 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) { 2214 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response"); 2215 wpabuf_free(buf); 2216 return NULL; 2217 } 2218 2219#ifdef CONFIG_WIFI_DISPLAY 2220 if (p2p->wfd_ie_probe_resp) 2221 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp); 2222#endif /* CONFIG_WIFI_DISPLAY */ 2223 2224 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]) 2225 wpabuf_put_buf(buf, 2226 p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]); 2227 2228 /* P2P IE */ 2229 len = p2p_buf_add_ie_hdr(buf); 2230 p2p_buf_add_capability(buf, p2p->dev_capab & 2231 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2232 if (p2p->ext_listen_interval) 2233 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 2234 p2p->ext_listen_interval); 2235 p2p_buf_add_device_info(buf, p2p, NULL); 2236 p2p_buf_update_ie_hdr(buf, len); 2237 2238 if (query_count) { 2239 p2p_buf_add_service_instance(buf, p2p, query_count, query_hash, 2240 p2p->p2ps_adv_list); 2241 } 2242 2243 return buf; 2244} 2245 2246static int p2p_build_probe_resp_buf(struct p2p_data *p2p, struct wpabuf *buf, 2247 struct wpabuf *ies, 2248 const u8 *addr, int rx_freq) 2249{ 2250 struct ieee80211_mgmt *resp; 2251 u8 channel, op_class; 2252 2253 resp = wpabuf_put(buf, offsetof(struct ieee80211_mgmt, 2254 u.probe_resp.variable)); 2255 2256 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 2257 (WLAN_FC_STYPE_PROBE_RESP << 4)); 2258 os_memcpy(resp->da, addr, ETH_ALEN); 2259 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN); 2260 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN); 2261 resp->u.probe_resp.beacon_int = host_to_le16(100); 2262 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 2263 resp->u.probe_resp.capab_info = 2264 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE | 2265 WLAN_CAPABILITY_PRIVACY | 2266 WLAN_CAPABILITY_SHORT_SLOT_TIME); 2267 2268 wpabuf_put_u8(buf, WLAN_EID_SSID); 2269 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN); 2270 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 2271 2272 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES); 2273 wpabuf_put_u8(buf, 8); 2274 wpabuf_put_u8(buf, (60 / 5) | 0x80); 2275 wpabuf_put_u8(buf, 90 / 5); 2276 wpabuf_put_u8(buf, (120 / 5) | 0x80); 2277 wpabuf_put_u8(buf, 180 / 5); 2278 wpabuf_put_u8(buf, (240 / 5) | 0x80); 2279 wpabuf_put_u8(buf, 360 / 5); 2280 wpabuf_put_u8(buf, 480 / 5); 2281 wpabuf_put_u8(buf, 540 / 5); 2282 2283 if (!rx_freq) { 2284 channel = p2p->cfg->channel; 2285 } else if (p2p_freq_to_channel(rx_freq, &op_class, &channel)) { 2286 p2p_err(p2p, "Failed to convert freq to channel"); 2287 return -1; 2288 } 2289 2290 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS); 2291 wpabuf_put_u8(buf, 1); 2292 wpabuf_put_u8(buf, channel); 2293 2294 wpabuf_put_buf(buf, ies); 2295 2296 return 0; 2297} 2298 2299static int p2p_service_find_asp(struct p2p_data *p2p, const u8 *hash) 2300{ 2301 struct p2ps_advertisement *adv_data; 2302 int any_wfa; 2303 2304 p2p_dbg(p2p, "ASP find - ASP list: %p", p2p->p2ps_adv_list); 2305 2306 /* Wildcard org.wi-fi.wfds matches any WFA spec defined service */ 2307 any_wfa = os_memcmp(hash, p2p->wild_card_hash, P2PS_HASH_LEN) == 0; 2308 2309 adv_data = p2p->p2ps_adv_list; 2310 while (adv_data) { 2311 if (os_memcmp(hash, adv_data->hash, P2PS_HASH_LEN) == 0) 2312 return 1; /* exact hash match */ 2313 if (any_wfa && 2314 os_strncmp(adv_data->svc_name, P2PS_WILD_HASH_STR, 2315 os_strlen(P2PS_WILD_HASH_STR)) == 0) 2316 return 1; /* WFA service match */ 2317 adv_data = adv_data->next; 2318 } 2319 2320 return 0; 2321} 2322 2323 2324static enum p2p_probe_req_status 2325p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2326 const u8 *bssid, const u8 *ie, size_t ie_len, 2327 unsigned int rx_freq) 2328{ 2329 struct ieee802_11_elems elems; 2330 struct wpabuf *buf; 2331 struct p2p_message msg; 2332 struct wpabuf *ies; 2333 2334 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) == 2335 ParseFailed) { 2336 /* Ignore invalid Probe Request frames */ 2337 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it"); 2338 return P2P_PREQ_MALFORMED; 2339 } 2340 2341 if (elems.p2p == NULL) { 2342 /* not a P2P probe - ignore it */ 2343 p2p_dbg(p2p, "Not a P2P probe - ignore it"); 2344 return P2P_PREQ_NOT_P2P; 2345 } 2346 2347 if (dst && !is_broadcast_ether_addr(dst) && 2348 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2349 /* Not sent to the broadcast address or our P2P Device Address 2350 */ 2351 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it", 2352 MAC2STR(dst)); 2353 return P2P_PREQ_NOT_PROCESSED; 2354 } 2355 2356 if (bssid && !is_broadcast_ether_addr(bssid)) { 2357 /* Not sent to the Wildcard BSSID */ 2358 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it", 2359 MAC2STR(bssid)); 2360 return P2P_PREQ_NOT_PROCESSED; 2361 } 2362 2363 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN || 2364 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) != 2365 0) { 2366 /* not using P2P Wildcard SSID - ignore */ 2367 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it"); 2368 return P2P_PREQ_NOT_PROCESSED; 2369 } 2370 2371 if (supp_rates_11b_only(&elems)) { 2372 /* Indicates support for 11b rates only */ 2373 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it"); 2374 return P2P_PREQ_NOT_P2P; 2375 } 2376 2377 os_memset(&msg, 0, sizeof(msg)); 2378 if (p2p_parse_ies(ie, ie_len, &msg) < 0) { 2379 /* Could not parse P2P attributes */ 2380 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it"); 2381 return P2P_PREQ_NOT_P2P; 2382 } 2383 2384 if (msg.service_hash && msg.service_hash_count) { 2385 const u8 *hash = msg.service_hash; 2386 u8 i; 2387 int p2ps_svc_found = 0; 2388 2389 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", 2390 p2p->in_listen, p2p->drv_in_listen, rx_freq, 2391 p2p->cfg->channel, p2p->pending_listen_freq); 2392 2393 if (!p2p->in_listen && !p2p->drv_in_listen && 2394 p2p->pending_listen_freq && rx_freq && 2395 rx_freq != p2p->pending_listen_freq) { 2396 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", 2397 rx_freq, p2p->pending_listen_freq); 2398 p2p_parse_free(&msg); 2399 return P2P_PREQ_NOT_LISTEN; 2400 } 2401 2402 for (i = 0; i < msg.service_hash_count; i++) { 2403 if (p2p_service_find_asp(p2p, hash)) { 2404 p2p_dbg(p2p, "Service Hash match found: " 2405 MACSTR, MAC2STR(hash)); 2406 p2ps_svc_found = 1; 2407 break; 2408 } 2409 hash += P2PS_HASH_LEN; 2410 } 2411 2412 /* Probed hash unknown */ 2413 if (!p2ps_svc_found) { 2414 p2p_dbg(p2p, "No Service Hash match found"); 2415 p2p_parse_free(&msg); 2416 return P2P_PREQ_NOT_PROCESSED; 2417 } 2418 } else { 2419 /* This is not a P2PS Probe Request */ 2420 p2p_dbg(p2p, "No P2PS Hash in Probe Request"); 2421 2422 if (!p2p->in_listen || !p2p->drv_in_listen) { 2423 /* not in Listen state - ignore Probe Request */ 2424 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request", 2425 p2p->in_listen, p2p->drv_in_listen); 2426 p2p_parse_free(&msg); 2427 return P2P_PREQ_NOT_LISTEN; 2428 } 2429 } 2430 2431 if (msg.device_id && 2432 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2433 /* Device ID did not match */ 2434 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it", 2435 MAC2STR(msg.device_id)); 2436 p2p_parse_free(&msg); 2437 return P2P_PREQ_NOT_PROCESSED; 2438 } 2439 2440 /* Check Requested Device Type match */ 2441 if (msg.wps_attributes && 2442 !p2p_match_dev_type(p2p, msg.wps_attributes)) { 2443 /* No match with Requested Device Type */ 2444 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it"); 2445 p2p_parse_free(&msg); 2446 return P2P_PREQ_NOT_PROCESSED; 2447 } 2448 2449 if (!p2p->cfg->send_probe_resp) { 2450 /* Response generated elsewhere */ 2451 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response"); 2452 p2p_parse_free(&msg); 2453 return P2P_PREQ_NOT_PROCESSED; 2454 } 2455 2456 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state"); 2457 2458 /* 2459 * We do not really have a specific BSS that this frame is advertising, 2460 * so build a frame that has some information in valid format. This is 2461 * really only used for discovery purposes, not to learn exact BSS 2462 * parameters. 2463 */ 2464 ies = p2p_build_probe_resp_ies(p2p, msg.service_hash, 2465 msg.service_hash_count); 2466 p2p_parse_free(&msg); 2467 if (ies == NULL) 2468 return P2P_PREQ_NOT_PROCESSED; 2469 2470 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 2471 if (buf == NULL) { 2472 wpabuf_free(ies); 2473 return P2P_PREQ_NOT_PROCESSED; 2474 } 2475 2476 if (p2p_build_probe_resp_buf(p2p, buf, ies, addr, rx_freq)) { 2477 wpabuf_free(ies); 2478 wpabuf_free(buf); 2479 return P2P_PREQ_NOT_PROCESSED; 2480 } 2481 2482 wpabuf_free(ies); 2483 2484 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf, rx_freq); 2485 2486 wpabuf_free(buf); 2487 2488 return P2P_PREQ_PROCESSED; 2489} 2490 2491 2492enum p2p_probe_req_status 2493p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2494 const u8 *bssid, const u8 *ie, size_t ie_len, 2495 unsigned int rx_freq, int p2p_lo_started) 2496{ 2497 enum p2p_probe_req_status res; 2498 2499 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len); 2500 2501 if (p2p_lo_started) { 2502 p2p_dbg(p2p, 2503 "Probe Response is offloaded, do not reply Probe Request"); 2504 return P2P_PREQ_PROCESSED; 2505 } 2506 2507 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len, rx_freq); 2508 if (res != P2P_PREQ_PROCESSED && res != P2P_PREQ_NOT_PROCESSED) 2509 return res; 2510 2511 /* 2512 * Activate a pending GO Negotiation/Invite flow if a received Probe 2513 * Request frame is from an expected peer. Some devices may share the 2514 * same address for P2P and non-P2P STA running simultaneously. The 2515 * P2P_PREQ_PROCESSED and P2P_PREQ_NOT_PROCESSED p2p_reply_probe() 2516 * return values verified above ensure we are handling a Probe Request 2517 * frame from a P2P peer. 2518 */ 2519 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) && 2520 p2p->go_neg_peer && 2521 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN) 2522 == 0 && 2523 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 2524 /* Received a Probe Request from GO Negotiation peer */ 2525 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout"); 2526 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2527 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL); 2528 return res; 2529 } 2530 2531 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) && 2532 p2p->invite_peer && 2533 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) && 2534 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN) 2535 == 0) { 2536 /* Received a Probe Request from Invite peer */ 2537 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout"); 2538 eloop_cancel_timeout(p2p_invite_start, p2p, NULL); 2539 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL); 2540 return res; 2541 } 2542 2543 return res; 2544} 2545 2546 2547static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid, 2548 u8 *buf, size_t len, struct wpabuf *p2p_ie) 2549{ 2550 struct wpabuf *tmp; 2551 u8 *lpos; 2552 size_t tmplen; 2553 int res; 2554 u8 group_capab; 2555 struct p2p_message msg; 2556 2557 if (p2p_ie == NULL) 2558 return 0; /* WLAN AP is not a P2P manager */ 2559 2560 os_memset(&msg, 0, sizeof(msg)); 2561 if (p2p_parse_p2p_ie(p2p_ie, &msg) < 0) 2562 return 0; 2563 2564 p2p_dbg(p2p, "BSS P2P manageability %s", 2565 msg.manageability ? "enabled" : "disabled"); 2566 2567 if (!msg.manageability) 2568 return 0; 2569 2570 /* 2571 * (Re)Association Request - P2P IE 2572 * P2P Capability attribute (shall be present) 2573 * P2P Interface attribute (present if concurrent device and 2574 * P2P Management is enabled) 2575 */ 2576 tmp = wpabuf_alloc(200); 2577 if (tmp == NULL) 2578 return -1; 2579 2580 lpos = p2p_buf_add_ie_hdr(tmp); 2581 group_capab = 0; 2582 if (p2p->num_groups > 0) { 2583 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; 2584 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2585 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) && 2586 p2p->cross_connect) 2587 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 2588 } 2589 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab); 2590 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2591 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED)) 2592 p2p_buf_add_p2p_interface(tmp, p2p); 2593 p2p_buf_update_ie_hdr(tmp, lpos); 2594 2595 tmplen = wpabuf_len(tmp); 2596 if (tmplen > len) 2597 res = -1; 2598 else { 2599 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2600 res = tmplen; 2601 } 2602 wpabuf_free(tmp); 2603 2604 return res; 2605} 2606 2607 2608int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf, 2609 size_t len, int p2p_group, struct wpabuf *p2p_ie) 2610{ 2611 struct wpabuf *tmp; 2612 u8 *lpos; 2613 struct p2p_device *peer; 2614 size_t tmplen; 2615 int res; 2616 size_t extra = 0; 2617 2618 if (!p2p_group) 2619 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie); 2620 2621#ifdef CONFIG_WIFI_DISPLAY 2622 if (p2p->wfd_ie_assoc_req) 2623 extra = wpabuf_len(p2p->wfd_ie_assoc_req); 2624#endif /* CONFIG_WIFI_DISPLAY */ 2625 2626 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]) 2627 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]); 2628 2629 /* 2630 * (Re)Association Request - P2P IE 2631 * P2P Capability attribute (shall be present) 2632 * Extended Listen Timing (may be present) 2633 * P2P Device Info attribute (shall be present) 2634 */ 2635 tmp = wpabuf_alloc(200 + extra); 2636 if (tmp == NULL) 2637 return -1; 2638 2639#ifdef CONFIG_WIFI_DISPLAY 2640 if (p2p->wfd_ie_assoc_req) 2641 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req); 2642#endif /* CONFIG_WIFI_DISPLAY */ 2643 2644 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]) 2645 wpabuf_put_buf(tmp, 2646 p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]); 2647 2648 peer = bssid ? p2p_get_device(p2p, bssid) : NULL; 2649 2650 lpos = p2p_buf_add_ie_hdr(tmp); 2651 p2p_buf_add_capability(tmp, p2p->dev_capab, 0); 2652 if (p2p->ext_listen_interval) 2653 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period, 2654 p2p->ext_listen_interval); 2655 p2p_buf_add_device_info(tmp, p2p, peer); 2656 p2p_buf_update_ie_hdr(tmp, lpos); 2657 2658 tmplen = wpabuf_len(tmp); 2659 if (tmplen > len) 2660 res = -1; 2661 else { 2662 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2663 res = tmplen; 2664 } 2665 wpabuf_free(tmp); 2666 2667 return res; 2668} 2669 2670 2671int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) 2672{ 2673 struct wpabuf *p2p_ie; 2674 int ret; 2675 2676 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); 2677 if (p2p_ie == NULL) 2678 return 0; 2679 2680 ret = p2p_attr_text(p2p_ie, buf, end); 2681 wpabuf_free(p2p_ie); 2682 return ret; 2683} 2684 2685 2686struct p2ps_advertisement * 2687p2p_service_p2ps_id(struct p2p_data *p2p, u32 adv_id) 2688{ 2689 struct p2ps_advertisement *adv_data; 2690 2691 if (!p2p) 2692 return NULL; 2693 2694 adv_data = p2p->p2ps_adv_list; 2695 while (adv_data) { 2696 if (adv_data->id == adv_id) 2697 return adv_data; 2698 adv_data = adv_data->next; 2699 } 2700 2701 return NULL; 2702} 2703 2704 2705int p2p_service_del_asp(struct p2p_data *p2p, u32 adv_id) 2706{ 2707 struct p2ps_advertisement *adv_data; 2708 struct p2ps_advertisement **prior; 2709 2710 if (!p2p) 2711 return -1; 2712 2713 adv_data = p2p->p2ps_adv_list; 2714 prior = &p2p->p2ps_adv_list; 2715 while (adv_data) { 2716 if (adv_data->id == adv_id) { 2717 p2p_dbg(p2p, "Delete ASP adv_id=0x%x", adv_id); 2718 *prior = adv_data->next; 2719 os_free(adv_data); 2720 return 0; 2721 } 2722 prior = &adv_data->next; 2723 adv_data = adv_data->next; 2724 } 2725 2726 return -1; 2727} 2728 2729 2730int p2p_service_add_asp(struct p2p_data *p2p, int auto_accept, u32 adv_id, 2731 const char *adv_str, u8 svc_state, u16 config_methods, 2732 const char *svc_info, const u8 *cpt_priority) 2733{ 2734 struct p2ps_advertisement *adv_data, *tmp, **prev; 2735 u8 buf[P2PS_HASH_LEN]; 2736 size_t adv_data_len, adv_len, info_len = 0; 2737 int i; 2738 2739 if (!p2p || !adv_str || !adv_str[0] || !cpt_priority) 2740 return -1; 2741 2742 if (!(config_methods & p2p->cfg->config_methods)) { 2743 p2p_dbg(p2p, "Config methods not supported svc: 0x%x dev: 0x%x", 2744 config_methods, p2p->cfg->config_methods); 2745 return -1; 2746 } 2747 2748 if (!p2ps_gen_hash(p2p, adv_str, buf)) 2749 return -1; 2750 2751 if (svc_info) 2752 info_len = os_strlen(svc_info); 2753 adv_len = os_strlen(adv_str); 2754 adv_data_len = sizeof(struct p2ps_advertisement) + adv_len + 1 + 2755 info_len + 1; 2756 2757 adv_data = os_zalloc(adv_data_len); 2758 if (!adv_data) 2759 return -1; 2760 2761 os_memcpy(adv_data->hash, buf, P2PS_HASH_LEN); 2762 adv_data->id = adv_id; 2763 adv_data->state = svc_state; 2764 adv_data->config_methods = config_methods & p2p->cfg->config_methods; 2765 adv_data->auto_accept = (u8) auto_accept; 2766 os_memcpy(adv_data->svc_name, adv_str, adv_len); 2767 2768 for (i = 0; cpt_priority[i] && i < P2PS_FEATURE_CAPAB_CPT_MAX; i++) { 2769 adv_data->cpt_priority[i] = cpt_priority[i]; 2770 adv_data->cpt_mask |= cpt_priority[i]; 2771 } 2772 2773 if (svc_info && info_len) { 2774 adv_data->svc_info = &adv_data->svc_name[adv_len + 1]; 2775 os_memcpy(adv_data->svc_info, svc_info, info_len); 2776 } 2777 2778 /* 2779 * Group Advertisements by service string. They do not need to be 2780 * sorted, but groups allow easier Probe Response instance grouping 2781 */ 2782 tmp = p2p->p2ps_adv_list; 2783 prev = &p2p->p2ps_adv_list; 2784 while (tmp) { 2785 if (tmp->id == adv_data->id) { 2786 if (os_strcmp(tmp->svc_name, adv_data->svc_name) != 0) { 2787 os_free(adv_data); 2788 return -1; 2789 } 2790 adv_data->next = tmp->next; 2791 *prev = adv_data; 2792 os_free(tmp); 2793 goto inserted; 2794 } else { 2795 if (os_strcmp(tmp->svc_name, adv_data->svc_name) == 0) { 2796 adv_data->next = tmp->next; 2797 tmp->next = adv_data; 2798 goto inserted; 2799 } 2800 } 2801 prev = &tmp->next; 2802 tmp = tmp->next; 2803 } 2804 2805 /* No svc_name match found */ 2806 adv_data->next = p2p->p2ps_adv_list; 2807 p2p->p2ps_adv_list = adv_data; 2808 2809inserted: 2810 p2p_dbg(p2p, 2811 "Added ASP advertisement adv_id=0x%x config_methods=0x%x svc_state=0x%x adv_str='%s' cpt_mask=0x%x", 2812 adv_id, adv_data->config_methods, svc_state, adv_str, 2813 adv_data->cpt_mask); 2814 2815 return 0; 2816} 2817 2818 2819void p2p_service_flush_asp(struct p2p_data *p2p) 2820{ 2821 struct p2ps_advertisement *adv, *prev; 2822 2823 if (!p2p) 2824 return; 2825 2826 adv = p2p->p2ps_adv_list; 2827 while (adv) { 2828 prev = adv; 2829 adv = adv->next; 2830 os_free(prev); 2831 } 2832 2833 p2p->p2ps_adv_list = NULL; 2834 p2ps_prov_free(p2p); 2835 p2p_dbg(p2p, "All ASP advertisements flushed"); 2836} 2837 2838 2839int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr) 2840{ 2841 struct p2p_message msg; 2842 2843 os_memset(&msg, 0, sizeof(msg)); 2844 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 2845 return -1; 2846 2847 if (msg.p2p_device_addr) { 2848 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); 2849 return 0; 2850 } else if (msg.device_id) { 2851 os_memcpy(dev_addr, msg.device_id, ETH_ALEN); 2852 return 0; 2853 } 2854 return -1; 2855} 2856 2857 2858int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr) 2859{ 2860 struct wpabuf *p2p_ie; 2861 int ret; 2862 2863 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 2864 P2P_IE_VENDOR_TYPE); 2865 if (p2p_ie == NULL) 2866 return -1; 2867 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr); 2868 wpabuf_free(p2p_ie); 2869 return ret; 2870} 2871 2872 2873static void p2p_clear_go_neg(struct p2p_data *p2p) 2874{ 2875 p2p->go_neg_peer = NULL; 2876 p2p_clear_timeout(p2p); 2877 p2p_set_state(p2p, P2P_IDLE); 2878} 2879 2880 2881void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr) 2882{ 2883 if (p2p->go_neg_peer == NULL) { 2884 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification"); 2885 return; /* No pending Group Formation */ 2886 } 2887 2888 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) != 2889 0) { 2890 p2p_dbg(p2p, "Ignore WPS registration success notification for " 2891 MACSTR " (GO Negotiation peer " MACSTR ")", 2892 MAC2STR(mac_addr), 2893 MAC2STR(p2p->go_neg_peer->intended_addr)); 2894 return; /* Ignore unexpected peer address */ 2895 } 2896 2897 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR, 2898 MAC2STR(mac_addr)); 2899 2900 p2p_clear_go_neg(p2p); 2901} 2902 2903 2904void p2p_group_formation_failed(struct p2p_data *p2p) 2905{ 2906 if (p2p->go_neg_peer == NULL) { 2907 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification"); 2908 return; /* No pending Group Formation */ 2909 } 2910 2911 p2p_dbg(p2p, "Group Formation failed with " MACSTR, 2912 MAC2STR(p2p->go_neg_peer->intended_addr)); 2913 2914 p2p_clear_go_neg(p2p); 2915} 2916 2917 2918struct p2p_data * p2p_init(const struct p2p_config *cfg) 2919{ 2920 struct p2p_data *p2p; 2921 2922 if (cfg->max_peers < 1 || 2923 cfg->passphrase_len < 8 || cfg->passphrase_len > 63) 2924 return NULL; 2925 2926 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg)); 2927 if (p2p == NULL) 2928 return NULL; 2929 p2p->cfg = (struct p2p_config *) (p2p + 1); 2930 os_memcpy(p2p->cfg, cfg, sizeof(*cfg)); 2931 if (cfg->dev_name) 2932 p2p->cfg->dev_name = os_strdup(cfg->dev_name); 2933 if (cfg->manufacturer) 2934 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer); 2935 if (cfg->model_name) 2936 p2p->cfg->model_name = os_strdup(cfg->model_name); 2937 if (cfg->model_number) 2938 p2p->cfg->model_number = os_strdup(cfg->model_number); 2939 if (cfg->serial_number) 2940 p2p->cfg->serial_number = os_strdup(cfg->serial_number); 2941 if (cfg->pref_chan) { 2942 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan * 2943 sizeof(struct p2p_channel)); 2944 if (p2p->cfg->pref_chan) { 2945 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan, 2946 cfg->num_pref_chan * 2947 sizeof(struct p2p_channel)); 2948 } else 2949 p2p->cfg->num_pref_chan = 0; 2950 } 2951 2952 p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash); 2953 2954 p2p->min_disc_int = 1; 2955 p2p->max_disc_int = 3; 2956 p2p->max_disc_tu = -1; 2957 2958 if (os_get_random(&p2p->next_tie_breaker, 1) < 0) 2959 p2p->next_tie_breaker = 0; 2960 p2p->next_tie_breaker &= 0x01; 2961 if (cfg->sd_request) 2962 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 2963 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE; 2964 if (cfg->concurrent_operations) 2965 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER; 2966 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 2967 2968 dl_list_init(&p2p->devices); 2969 2970 p2p->go_timeout = 100; 2971 p2p->client_timeout = 20; 2972 p2p->num_p2p_sd_queries = 0; 2973 2974 p2p_dbg(p2p, "initialized"); 2975 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 2976 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 2977 2978 return p2p; 2979} 2980 2981 2982void p2p_deinit(struct p2p_data *p2p) 2983{ 2984#ifdef CONFIG_WIFI_DISPLAY 2985 wpabuf_free(p2p->wfd_ie_beacon); 2986 wpabuf_free(p2p->wfd_ie_probe_req); 2987 wpabuf_free(p2p->wfd_ie_probe_resp); 2988 wpabuf_free(p2p->wfd_ie_assoc_req); 2989 wpabuf_free(p2p->wfd_ie_invitation); 2990 wpabuf_free(p2p->wfd_ie_prov_disc_req); 2991 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 2992 wpabuf_free(p2p->wfd_ie_go_neg); 2993 wpabuf_free(p2p->wfd_dev_info); 2994 wpabuf_free(p2p->wfd_assoc_bssid); 2995 wpabuf_free(p2p->wfd_coupled_sink_info); 2996#endif /* CONFIG_WIFI_DISPLAY */ 2997 2998 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2999 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 3000 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL); 3001 p2p_flush(p2p); 3002 p2p_free_req_dev_types(p2p); 3003 os_free(p2p->cfg->dev_name); 3004 os_free(p2p->cfg->manufacturer); 3005 os_free(p2p->cfg->model_name); 3006 os_free(p2p->cfg->model_number); 3007 os_free(p2p->cfg->serial_number); 3008 os_free(p2p->cfg->pref_chan); 3009 os_free(p2p->groups); 3010 p2ps_prov_free(p2p); 3011 wpabuf_free(p2p->sd_resp); 3012 p2p_remove_wps_vendor_extensions(p2p); 3013 os_free(p2p->no_go_freq.range); 3014 p2p_service_flush_asp(p2p); 3015 3016 os_free(p2p); 3017} 3018 3019 3020void p2p_flush(struct p2p_data *p2p) 3021{ 3022 struct p2p_device *dev, *prev; 3023 3024 p2p_ext_listen(p2p, 0, 0); 3025 p2p_stop_find(p2p); 3026 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device, 3027 list) { 3028 dl_list_del(&dev->list); 3029 p2p_device_free(p2p, dev); 3030 } 3031 p2p_free_sd_queries(p2p); 3032 os_free(p2p->after_scan_tx); 3033 p2p->after_scan_tx = NULL; 3034 p2p->ssid_set = 0; 3035 p2ps_prov_free(p2p); 3036 p2p_reset_pending_pd(p2p); 3037} 3038 3039 3040int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr) 3041{ 3042 struct p2p_device *dev; 3043 3044 dev = p2p_get_device(p2p, addr); 3045 if (dev == NULL) 3046 return -1; 3047 3048 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr)); 3049 3050 if (p2p->go_neg_peer == dev) { 3051 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL); 3052 p2p->go_neg_peer = NULL; 3053 } 3054 3055 dev->wps_method = WPS_NOT_READY; 3056 dev->oob_pw_id = 0; 3057 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 3058 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 3059 3060 /* Check if after_scan_tx is for this peer. If so free it */ 3061 if (p2p->after_scan_tx && 3062 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) { 3063 os_free(p2p->after_scan_tx); 3064 p2p->after_scan_tx = NULL; 3065 } 3066 3067 return 0; 3068} 3069 3070 3071int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name) 3072{ 3073 os_free(p2p->cfg->dev_name); 3074 if (dev_name) { 3075 p2p->cfg->dev_name = os_strdup(dev_name); 3076 if (p2p->cfg->dev_name == NULL) 3077 return -1; 3078 } else 3079 p2p->cfg->dev_name = NULL; 3080 return 0; 3081} 3082 3083 3084int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer) 3085{ 3086 os_free(p2p->cfg->manufacturer); 3087 p2p->cfg->manufacturer = NULL; 3088 if (manufacturer) { 3089 p2p->cfg->manufacturer = os_strdup(manufacturer); 3090 if (p2p->cfg->manufacturer == NULL) 3091 return -1; 3092 } 3093 3094 return 0; 3095} 3096 3097 3098int p2p_set_model_name(struct p2p_data *p2p, const char *model_name) 3099{ 3100 os_free(p2p->cfg->model_name); 3101 p2p->cfg->model_name = NULL; 3102 if (model_name) { 3103 p2p->cfg->model_name = os_strdup(model_name); 3104 if (p2p->cfg->model_name == NULL) 3105 return -1; 3106 } 3107 3108 return 0; 3109} 3110 3111 3112int p2p_set_model_number(struct p2p_data *p2p, const char *model_number) 3113{ 3114 os_free(p2p->cfg->model_number); 3115 p2p->cfg->model_number = NULL; 3116 if (model_number) { 3117 p2p->cfg->model_number = os_strdup(model_number); 3118 if (p2p->cfg->model_number == NULL) 3119 return -1; 3120 } 3121 3122 return 0; 3123} 3124 3125 3126int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number) 3127{ 3128 os_free(p2p->cfg->serial_number); 3129 p2p->cfg->serial_number = NULL; 3130 if (serial_number) { 3131 p2p->cfg->serial_number = os_strdup(serial_number); 3132 if (p2p->cfg->serial_number == NULL) 3133 return -1; 3134 } 3135 3136 return 0; 3137} 3138 3139 3140void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods) 3141{ 3142 p2p->cfg->config_methods = config_methods; 3143} 3144 3145 3146void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid) 3147{ 3148 os_memcpy(p2p->cfg->uuid, uuid, 16); 3149} 3150 3151 3152int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type) 3153{ 3154 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8); 3155 return 0; 3156} 3157 3158 3159int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8], 3160 size_t num_dev_types) 3161{ 3162 if (num_dev_types > P2P_SEC_DEVICE_TYPES) 3163 num_dev_types = P2P_SEC_DEVICE_TYPES; 3164 p2p->cfg->num_sec_dev_types = num_dev_types; 3165 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8); 3166 return 0; 3167} 3168 3169 3170void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p) 3171{ 3172 int i; 3173 3174 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 3175 wpabuf_free(p2p->wps_vendor_ext[i]); 3176 p2p->wps_vendor_ext[i] = NULL; 3177 } 3178} 3179 3180 3181int p2p_add_wps_vendor_extension(struct p2p_data *p2p, 3182 const struct wpabuf *vendor_ext) 3183{ 3184 int i; 3185 3186 if (vendor_ext == NULL) 3187 return -1; 3188 3189 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 3190 if (p2p->wps_vendor_ext[i] == NULL) 3191 break; 3192 } 3193 if (i >= P2P_MAX_WPS_VENDOR_EXT) 3194 return -1; 3195 3196 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext); 3197 if (p2p->wps_vendor_ext[i] == NULL) 3198 return -1; 3199 3200 return 0; 3201} 3202 3203 3204int p2p_set_country(struct p2p_data *p2p, const char *country) 3205{ 3206 os_memcpy(p2p->cfg->country, country, 3); 3207 return 0; 3208} 3209 3210 3211static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev) 3212{ 3213 int res; 3214 3215 if (dev->sd_pending_bcast_queries == 0) { 3216 /* Initialize with total number of registered broadcast 3217 * SD queries. */ 3218 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries; 3219 } 3220 3221 res = p2p_start_sd(p2p, dev); 3222 if (res == -2) 3223 return -2; 3224 if (res == 0) 3225 return 1; 3226 3227 if (dev->req_config_methods && 3228 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) { 3229 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 3230 MACSTR " (config methods 0x%x)", 3231 MAC2STR(dev->info.p2p_device_addr), 3232 dev->req_config_methods); 3233 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0) 3234 return 1; 3235 } 3236 3237 return 0; 3238} 3239 3240 3241void p2p_continue_find(struct p2p_data *p2p) 3242{ 3243 struct p2p_device *dev; 3244 int found, res; 3245 3246 p2p_set_state(p2p, P2P_SEARCH); 3247 3248 /* Continue from the device following the last iteration */ 3249 found = 0; 3250 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3251 if (dev == p2p->last_p2p_find_oper) { 3252 found = 1; 3253 continue; 3254 } 3255 if (!found) 3256 continue; 3257 res = p2p_pre_find_operation(p2p, dev); 3258 if (res > 0) { 3259 p2p->last_p2p_find_oper = dev; 3260 return; 3261 } 3262 if (res == -2) 3263 goto skip_sd; 3264 } 3265 3266 /* 3267 * Wrap around to the beginning of the list and continue until the last 3268 * iteration device. 3269 */ 3270 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3271 res = p2p_pre_find_operation(p2p, dev); 3272 if (res > 0) { 3273 p2p->last_p2p_find_oper = dev; 3274 return; 3275 } 3276 if (res == -2) 3277 goto skip_sd; 3278 if (dev == p2p->last_p2p_find_oper) 3279 break; 3280 } 3281 3282skip_sd: 3283 os_memset(p2p->sd_query_no_ack, 0, ETH_ALEN); 3284 p2p_listen_in_find(p2p, 1); 3285} 3286 3287 3288static void p2p_sd_cb(struct p2p_data *p2p, int success) 3289{ 3290 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d", 3291 success); 3292 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3293 3294 if (!success) { 3295 if (p2p->sd_peer) { 3296 if (is_zero_ether_addr(p2p->sd_query_no_ack)) { 3297 os_memcpy(p2p->sd_query_no_ack, 3298 p2p->sd_peer->info.p2p_device_addr, 3299 ETH_ALEN); 3300 p2p_dbg(p2p, 3301 "First SD Query no-ACK in this search iteration: " 3302 MACSTR, MAC2STR(p2p->sd_query_no_ack)); 3303 } 3304 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3305 } 3306 p2p->sd_peer = NULL; 3307 if (p2p->state != P2P_IDLE) 3308 p2p_continue_find(p2p); 3309 return; 3310 } 3311 3312 if (p2p->sd_peer == NULL) { 3313 p2p_dbg(p2p, "No SD peer entry known"); 3314 if (p2p->state != P2P_IDLE) 3315 p2p_continue_find(p2p); 3316 return; 3317 } 3318 3319 if (p2p->sd_query && p2p->sd_query->for_all_peers) { 3320 /* Update the pending broadcast SD query count for this device 3321 */ 3322 p2p->sd_peer->sd_pending_bcast_queries--; 3323 3324 /* 3325 * If there are no pending broadcast queries for this device, 3326 * mark it as done (-1). 3327 */ 3328 if (p2p->sd_peer->sd_pending_bcast_queries == 0) 3329 p2p->sd_peer->sd_pending_bcast_queries = -1; 3330 } 3331 3332 /* Wait for response from the peer */ 3333 p2p_set_state(p2p, P2P_SD_DURING_FIND); 3334 p2p_set_timeout(p2p, 0, 200000); 3335} 3336 3337 3338/** 3339 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state 3340 * @p2p: P2P module context from p2p_init() 3341 */ 3342static void p2p_retry_pd(struct p2p_data *p2p) 3343{ 3344 struct p2p_device *dev; 3345 3346 /* 3347 * Retry the prov disc req attempt only for the peer that the user had 3348 * requested. 3349 */ 3350 3351 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3352 if (os_memcmp(p2p->pending_pd_devaddr, 3353 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3354 continue; 3355 if (!dev->req_config_methods) 3356 continue; 3357 3358 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 3359 MACSTR " (config methods 0x%x)", 3360 MAC2STR(dev->info.p2p_device_addr), 3361 dev->req_config_methods); 3362 p2p_send_prov_disc_req(p2p, dev, 3363 dev->flags & P2P_DEV_PD_FOR_JOIN, 3364 p2p->pd_force_freq); 3365 return; 3366 } 3367} 3368 3369 3370static void p2p_prov_disc_cb(struct p2p_data *p2p, int success) 3371{ 3372 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d", 3373 success); 3374 3375 /* 3376 * Postpone resetting the pending action state till after we actually 3377 * time out. This allows us to take some action like notifying any 3378 * interested parties about no response to the request. 3379 * 3380 * When the timer (below) goes off we check in IDLE, SEARCH, or 3381 * LISTEN_ONLY state, which are the only allowed states to issue a PD 3382 * requests in, if this was still pending and then raise notification. 3383 */ 3384 3385 if (!success) { 3386 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3387 3388 if (p2p->user_initiated_pd && 3389 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY)) 3390 { 3391 /* Retry request from timeout to avoid busy loops */ 3392 p2p->pending_action_state = P2P_PENDING_PD; 3393 p2p_set_timeout(p2p, 0, 50000); 3394 } else if (p2p->state != P2P_IDLE) 3395 p2p_continue_find(p2p); 3396 else if (p2p->user_initiated_pd) { 3397 p2p->pending_action_state = P2P_PENDING_PD; 3398 p2p_set_timeout(p2p, 0, 300000); 3399 } 3400 return; 3401 } 3402 3403 /* 3404 * If after PD Request the peer doesn't expect to receive PD Response 3405 * the PD Request ACK indicates a completion of the current PD. This 3406 * happens only on the advertiser side sending the follow-on PD Request 3407 * with the status different than 12 (Success: accepted by user). 3408 */ 3409 if (p2p->p2ps_prov && !p2p->p2ps_prov->pd_seeker && 3410 p2p->p2ps_prov->status != P2P_SC_SUCCESS_DEFERRED) { 3411 p2p_dbg(p2p, "P2PS PD completion on Follow-on PD Request ACK"); 3412 3413 if (p2p->send_action_in_progress) { 3414 p2p->send_action_in_progress = 0; 3415 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3416 } 3417 3418 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3419 3420 if (p2p->cfg->p2ps_prov_complete) { 3421 p2p->cfg->p2ps_prov_complete( 3422 p2p->cfg->cb_ctx, 3423 p2p->p2ps_prov->status, 3424 p2p->p2ps_prov->adv_mac, 3425 p2p->p2ps_prov->adv_mac, 3426 p2p->p2ps_prov->session_mac, 3427 NULL, p2p->p2ps_prov->adv_id, 3428 p2p->p2ps_prov->session_id, 3429 0, 0, NULL, 0, 0, 0, 3430 NULL, NULL, 0, 0, NULL, 0); 3431 } 3432 3433 if (p2p->user_initiated_pd) 3434 p2p_reset_pending_pd(p2p); 3435 3436 p2ps_prov_free(p2p); 3437 return; 3438 } 3439 3440 /* 3441 * This postponing, of resetting pending_action_state, needs to be 3442 * done only for user initiated PD requests and not internal ones. 3443 */ 3444 if (p2p->user_initiated_pd) 3445 p2p->pending_action_state = P2P_PENDING_PD; 3446 else 3447 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3448 3449 /* Wait for response from the peer */ 3450 if (p2p->state == P2P_SEARCH) 3451 p2p_set_state(p2p, P2P_PD_DURING_FIND); 3452 p2p_set_timeout(p2p, 0, 200000); 3453} 3454 3455 3456static int p2p_check_after_scan_tx_continuation(struct p2p_data *p2p) 3457{ 3458 if (p2p->after_scan_tx_in_progress) { 3459 p2p->after_scan_tx_in_progress = 0; 3460 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING && 3461 p2p_run_after_scan(p2p)) 3462 return 1; 3463 if (p2p->state == P2P_SEARCH) { 3464 p2p_dbg(p2p, "Continue find after after_scan_tx completion"); 3465 p2p_continue_find(p2p); 3466 } 3467 } 3468 3469 return 0; 3470} 3471 3472 3473static void p2p_prov_disc_resp_cb(struct p2p_data *p2p, int success) 3474{ 3475 p2p_dbg(p2p, "Provision Discovery Response TX callback: success=%d", 3476 success); 3477 3478 if (p2p->send_action_in_progress) { 3479 p2p->send_action_in_progress = 0; 3480 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3481 } 3482 3483 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3484 3485 if (!success) 3486 goto continue_search; 3487 3488 if (!p2p->cfg->prov_disc_resp_cb || 3489 p2p->cfg->prov_disc_resp_cb(p2p->cfg->cb_ctx) < 1) 3490 goto continue_search; 3491 3492 p2p_dbg(p2p, 3493 "Post-Provision Discovery operations started - do not try to continue other P2P operations"); 3494 return; 3495 3496continue_search: 3497 p2p_check_after_scan_tx_continuation(p2p); 3498} 3499 3500 3501int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq, 3502 struct os_reltime *rx_time, int level, const u8 *ies, 3503 size_t ies_len) 3504{ 3505 if (os_reltime_before(rx_time, &p2p->find_start)) { 3506 /* 3507 * The driver may have cached (e.g., in cfg80211 BSS table) the 3508 * scan results for relatively long time. To avoid reporting 3509 * stale information, update P2P peers only based on results 3510 * that have based on frames received after the last p2p_find 3511 * operation was started. 3512 */ 3513 p2p_dbg(p2p, "Ignore old scan result for " MACSTR 3514 " (rx_time=%u.%06u find_start=%u.%06u)", 3515 MAC2STR(bssid), (unsigned int) rx_time->sec, 3516 (unsigned int) rx_time->usec, 3517 (unsigned int) p2p->find_start.sec, 3518 (unsigned int) p2p->find_start.usec); 3519 return 0; 3520 } 3521 3522 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1); 3523 3524 return 0; 3525} 3526 3527 3528void p2p_scan_res_handled(struct p2p_data *p2p) 3529{ 3530 if (!p2p->p2p_scan_running) { 3531 p2p_dbg(p2p, "p2p_scan was not running, but scan results received"); 3532 } 3533 p2p->p2p_scan_running = 0; 3534 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 3535 3536 if (p2p_run_after_scan(p2p)) 3537 return; 3538 if (p2p->state == P2P_SEARCH) 3539 p2p_continue_find(p2p); 3540} 3541 3542 3543void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id, 3544 unsigned int bands) 3545{ 3546 u8 dev_capab; 3547 u8 *len; 3548 3549#ifdef CONFIG_WIFI_DISPLAY 3550 if (p2p->wfd_ie_probe_req) 3551 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req); 3552#endif /* CONFIG_WIFI_DISPLAY */ 3553 3554 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]) 3555 wpabuf_put_buf(ies, 3556 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]); 3557 3558 len = p2p_buf_add_ie_hdr(ies); 3559 3560 dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3561 3562 /* P2PS requires Probe Request frames to include SD bit */ 3563 if (p2p->p2ps_seek && p2p->p2ps_seek_count) 3564 dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 3565 3566 p2p_buf_add_capability(ies, dev_capab, 0); 3567 3568 if (dev_id) 3569 p2p_buf_add_device_id(ies, dev_id); 3570 if (p2p->cfg->reg_class && p2p->cfg->channel) 3571 p2p_buf_add_listen_channel(ies, p2p->cfg->country, 3572 p2p->cfg->reg_class, 3573 p2p->cfg->channel); 3574 if (p2p->ext_listen_interval) 3575 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period, 3576 p2p->ext_listen_interval); 3577 3578 if (bands & BAND_60_GHZ) 3579 p2p_buf_add_device_info(ies, p2p, NULL); 3580 3581 if (p2p->p2ps_seek && p2p->p2ps_seek_count) 3582 p2p_buf_add_service_hash(ies, p2p); 3583 3584 /* TODO: p2p_buf_add_operating_channel() if GO */ 3585 p2p_buf_update_ie_hdr(ies, len); 3586} 3587 3588 3589size_t p2p_scan_ie_buf_len(struct p2p_data *p2p) 3590{ 3591 size_t len = 100; 3592 3593#ifdef CONFIG_WIFI_DISPLAY 3594 if (p2p && p2p->wfd_ie_probe_req) 3595 len += wpabuf_len(p2p->wfd_ie_probe_req); 3596#endif /* CONFIG_WIFI_DISPLAY */ 3597 3598 if (p2p && p2p->vendor_elem && 3599 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]) 3600 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]); 3601 3602 return len; 3603} 3604 3605 3606int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end) 3607{ 3608 return p2p_attr_text(p2p_ie, buf, end); 3609} 3610 3611 3612static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success) 3613{ 3614 struct p2p_device *dev = p2p->go_neg_peer; 3615 int timeout; 3616 3617 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success); 3618 3619 if (dev == NULL) { 3620 p2p_dbg(p2p, "No pending GO Negotiation"); 3621 return; 3622 } 3623 3624 if (success) { 3625 if (dev->flags & P2P_DEV_USER_REJECTED) { 3626 p2p_set_state(p2p, P2P_IDLE); 3627 return; 3628 } 3629 } else if (dev->go_neg_req_sent) { 3630 /* Cancel the increment from p2p_connect_send() on failure */ 3631 dev->go_neg_req_sent--; 3632 } 3633 3634 if (!success && 3635 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) && 3636 !is_zero_ether_addr(dev->member_in_go_dev)) { 3637 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO", 3638 MAC2STR(dev->info.p2p_device_addr)); 3639 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3640 p2p_send_dev_disc_req(p2p, dev); 3641 return; 3642 } 3643 3644 /* 3645 * Use P2P find, if needed, to find the other device from its listen 3646 * channel. 3647 */ 3648 p2p_set_state(p2p, P2P_CONNECT); 3649 timeout = success ? 500000 : 100000; 3650 if (!success && p2p->go_neg_peer && 3651 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) { 3652 unsigned int r; 3653 /* 3654 * Peer is expected to wait our response and we will skip the 3655 * listen phase. Add some randomness to the wait time here to 3656 * make it less likely to hit cases where we could end up in 3657 * sync with peer not listening. 3658 */ 3659 if (os_get_random((u8 *) &r, sizeof(r)) < 0) 3660 r = 0; 3661 timeout += r % 100000; 3662 } 3663 p2p_set_timeout(p2p, 0, timeout); 3664} 3665 3666 3667static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success) 3668{ 3669 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d", 3670 success); 3671 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) { 3672 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore"); 3673 return; 3674 } 3675 p2p_set_state(p2p, P2P_CONNECT); 3676 p2p_set_timeout(p2p, 0, 500000); 3677} 3678 3679 3680static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success, 3681 const u8 *addr) 3682{ 3683 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success); 3684 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) { 3685 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status); 3686 return; 3687 } 3688 3689 if (success) { 3690 struct p2p_device *dev; 3691 dev = p2p_get_device(p2p, addr); 3692 if (dev && 3693 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) 3694 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE; 3695 } 3696 3697 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND) 3698 p2p_continue_find(p2p); 3699} 3700 3701 3702static void p2p_go_neg_conf_cb(struct p2p_data *p2p, 3703 enum p2p_send_action_result result) 3704{ 3705 struct p2p_device *dev; 3706 3707 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result); 3708 if (result == P2P_SEND_ACTION_FAILED) { 3709 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3710 p2p_go_neg_failed(p2p, -1); 3711 return; 3712 } 3713 3714 dev = p2p->go_neg_peer; 3715 3716 if (result == P2P_SEND_ACTION_NO_ACK) { 3717 /* 3718 * Retry GO Negotiation Confirmation 3719 * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive 3720 * ACK for confirmation. 3721 */ 3722 if (dev && dev->go_neg_conf && 3723 dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) { 3724 p2p_dbg(p2p, "GO Negotiation Confirm retry %d", 3725 dev->go_neg_conf_sent); 3726 p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM; 3727 if (p2p_send_action(p2p, dev->go_neg_conf_freq, 3728 dev->info.p2p_device_addr, 3729 p2p->cfg->dev_addr, 3730 dev->info.p2p_device_addr, 3731 wpabuf_head(dev->go_neg_conf), 3732 wpabuf_len(dev->go_neg_conf), 0) >= 3733 0) { 3734 dev->go_neg_conf_sent++; 3735 return; 3736 } 3737 p2p_dbg(p2p, "Failed to re-send Action frame"); 3738 3739 /* 3740 * Continue with the assumption that the first attempt 3741 * went through and just the ACK frame was lost. 3742 */ 3743 } 3744 3745 /* 3746 * It looks like the TX status for GO Negotiation Confirm is 3747 * often showing failure even when the peer has actually 3748 * received the frame. Since the peer may change channels 3749 * immediately after having received the frame, we may not see 3750 * an Ack for retries, so just dropping a single frame may 3751 * trigger this. To allow the group formation to succeed if the 3752 * peer did indeed receive the frame, continue regardless of 3753 * the TX status. 3754 */ 3755 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported"); 3756 } 3757 3758 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3759 3760 if (dev == NULL) 3761 return; 3762 3763 p2p_go_complete(p2p, dev); 3764} 3765 3766 3767void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 3768 const u8 *src, const u8 *bssid, 3769 enum p2p_send_action_result result) 3770{ 3771 enum p2p_pending_action_state state; 3772 int success; 3773 3774 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR 3775 " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)", 3776 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), 3777 MAC2STR(bssid), result, p2p_state_txt(p2p->state)); 3778 success = result == P2P_SEND_ACTION_SUCCESS; 3779 state = p2p->pending_action_state; 3780 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3781 switch (state) { 3782 case P2P_NO_PENDING_ACTION: 3783 if (p2p->send_action_in_progress) { 3784 p2p->send_action_in_progress = 0; 3785 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3786 } 3787 p2p_check_after_scan_tx_continuation(p2p); 3788 break; 3789 case P2P_PENDING_GO_NEG_REQUEST: 3790 p2p_go_neg_req_cb(p2p, success); 3791 break; 3792 case P2P_PENDING_GO_NEG_RESPONSE: 3793 p2p_go_neg_resp_cb(p2p, success); 3794 break; 3795 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE: 3796 p2p_go_neg_resp_failure_cb(p2p, success, dst); 3797 break; 3798 case P2P_PENDING_GO_NEG_CONFIRM: 3799 p2p_go_neg_conf_cb(p2p, result); 3800 break; 3801 case P2P_PENDING_SD: 3802 p2p_sd_cb(p2p, success); 3803 break; 3804 case P2P_PENDING_PD: 3805 p2p_prov_disc_cb(p2p, success); 3806 break; 3807 case P2P_PENDING_PD_RESPONSE: 3808 p2p_prov_disc_resp_cb(p2p, success); 3809 break; 3810 case P2P_PENDING_INVITATION_REQUEST: 3811 p2p_invitation_req_cb(p2p, success); 3812 break; 3813 case P2P_PENDING_INVITATION_RESPONSE: 3814 p2p_invitation_resp_cb(p2p, success); 3815 if (p2p->inv_status != P2P_SC_SUCCESS) 3816 p2p_check_after_scan_tx_continuation(p2p); 3817 break; 3818 case P2P_PENDING_DEV_DISC_REQUEST: 3819 p2p_dev_disc_req_cb(p2p, success); 3820 break; 3821 case P2P_PENDING_DEV_DISC_RESPONSE: 3822 p2p_dev_disc_resp_cb(p2p, success); 3823 break; 3824 case P2P_PENDING_GO_DISC_REQ: 3825 p2p_go_disc_req_cb(p2p, success); 3826 break; 3827 } 3828 3829 p2p->after_scan_tx_in_progress = 0; 3830} 3831 3832 3833void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq, 3834 unsigned int duration) 3835{ 3836 if (freq == p2p->pending_client_disc_freq) { 3837 p2p_dbg(p2p, "Client discoverability remain-awake completed"); 3838 p2p->pending_client_disc_freq = 0; 3839 return; 3840 } 3841 3842 if (freq != p2p->pending_listen_freq) { 3843 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)", 3844 freq, duration, p2p->pending_listen_freq); 3845 return; 3846 } 3847 3848 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback", 3849 p2p->pending_listen_sec, p2p->pending_listen_usec, 3850 p2p->pending_listen_freq); 3851 p2p->in_listen = 1; 3852 p2p->drv_in_listen = freq; 3853 if (p2p->pending_listen_sec || p2p->pending_listen_usec) { 3854 /* 3855 * Add 20 msec extra wait to avoid race condition with driver 3856 * remain-on-channel end event, i.e., give driver more time to 3857 * complete the operation before our timeout expires. 3858 */ 3859 p2p_set_timeout(p2p, p2p->pending_listen_sec, 3860 p2p->pending_listen_usec + 20000); 3861 } 3862 3863 p2p->pending_listen_freq = 0; 3864} 3865 3866 3867int p2p_listen_end(struct p2p_data *p2p, unsigned int freq) 3868{ 3869 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq); 3870 p2p->drv_in_listen = 0; 3871 if (p2p->in_listen) 3872 return 0; /* Internal timeout will trigger the next step */ 3873 3874 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) { 3875 if (p2p->go_neg_peer->connect_reqs >= 120) { 3876 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3877 p2p_go_neg_failed(p2p, -1); 3878 return 0; 3879 } 3880 3881 p2p_set_state(p2p, P2P_CONNECT); 3882 p2p_connect_send(p2p, p2p->go_neg_peer); 3883 return 1; 3884 } else if (p2p->state == P2P_SEARCH) { 3885 if (p2p->p2p_scan_running) { 3886 /* 3887 * Search is already in progress. This can happen if 3888 * an Action frame RX is reported immediately after 3889 * the end of a remain-on-channel operation and the 3890 * response frame to that is sent using an offchannel 3891 * operation while in p2p_find. Avoid an attempt to 3892 * restart a scan here. 3893 */ 3894 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one"); 3895 return 1; 3896 } 3897 if (p2p->pending_listen_freq) { 3898 /* 3899 * Better wait a bit if the driver is unable to start 3900 * offchannel operation for some reason. p2p_search() 3901 * will be started from internal timeout. 3902 */ 3903 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop"); 3904 p2p_set_timeout(p2p, 0, 100000); 3905 return 1; 3906 } 3907 if (p2p->search_delay) { 3908 p2p_dbg(p2p, "Delay search operation by %u ms", 3909 p2p->search_delay); 3910 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3911 (p2p->search_delay % 1000) * 1000); 3912 return 1; 3913 } 3914 p2p_search(p2p); 3915 return 1; 3916 } 3917 3918 return 0; 3919} 3920 3921 3922static void p2p_timeout_connect(struct p2p_data *p2p) 3923{ 3924 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3925 if (p2p->go_neg_peer && 3926 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 3927 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed"); 3928 p2p_go_neg_failed(p2p, -1); 3929 return; 3930 } 3931 if (p2p->go_neg_peer && 3932 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) && 3933 p2p->go_neg_peer->connect_reqs < 120) { 3934 p2p_dbg(p2p, "Peer expected to wait our response - skip listen"); 3935 p2p_connect_send(p2p, p2p->go_neg_peer); 3936 return; 3937 } 3938 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) { 3939 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)"); 3940 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3941 p2p_set_timeout(p2p, 0, 30000); 3942 return; 3943 } 3944 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3945 p2p_listen_in_find(p2p, 0); 3946} 3947 3948 3949static void p2p_timeout_connect_listen(struct p2p_data *p2p) 3950{ 3951 if (p2p->go_neg_peer) { 3952 if (p2p->drv_in_listen) { 3953 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete"); 3954 return; 3955 } 3956 3957 if (p2p->go_neg_peer->connect_reqs >= 120) { 3958 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3959 p2p_go_neg_failed(p2p, -1); 3960 return; 3961 } 3962 3963 p2p_set_state(p2p, P2P_CONNECT); 3964 p2p_connect_send(p2p, p2p->go_neg_peer); 3965 } else 3966 p2p_set_state(p2p, P2P_IDLE); 3967} 3968 3969 3970static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p) 3971{ 3972 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 3973 3974 if (p2p->cfg->is_concurrent_session_active && 3975 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx)) 3976 p2p_set_timeout(p2p, 0, 500000); 3977 else 3978 p2p_set_timeout(p2p, 0, 200000); 3979} 3980 3981 3982static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p) 3983{ 3984 struct p2p_device *dev = p2p->go_neg_peer; 3985 3986 if (dev == NULL) { 3987 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait"); 3988 return; 3989 } 3990 3991 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation"); 3992 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT); 3993 p2p_listen_in_find(p2p, 0); 3994} 3995 3996 3997static void p2p_timeout_sd_during_find(struct p2p_data *p2p) 3998{ 3999 p2p_dbg(p2p, "Service Discovery Query timeout"); 4000 if (p2p->sd_peer) { 4001 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 4002 p2p->sd_peer = NULL; 4003 } 4004 p2p_continue_find(p2p); 4005} 4006 4007 4008static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p) 4009{ 4010 p2p_dbg(p2p, "Provision Discovery Request timeout"); 4011 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 4012 p2p_continue_find(p2p); 4013} 4014 4015 4016static void p2p_timeout_prov_disc_req(struct p2p_data *p2p) 4017{ 4018 u32 adv_id = 0; 4019 u8 *adv_mac = NULL; 4020 4021 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 4022 4023 /* 4024 * For user initiated PD requests that we have not gotten any responses 4025 * for while in IDLE state, we retry them a couple of times before 4026 * giving up. 4027 */ 4028 if (!p2p->user_initiated_pd) 4029 return; 4030 4031 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout"); 4032 4033 if (p2p->pd_retries) { 4034 p2p->pd_retries--; 4035 p2p_retry_pd(p2p); 4036 } else { 4037 struct p2p_device *dev; 4038 int for_join = 0; 4039 4040 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 4041 if (os_memcmp(p2p->pending_pd_devaddr, 4042 dev->info.p2p_device_addr, ETH_ALEN) != 0) 4043 continue; 4044 if (dev->req_config_methods && 4045 (dev->flags & P2P_DEV_PD_FOR_JOIN)) 4046 for_join = 1; 4047 } 4048 4049 if (p2p->p2ps_prov) { 4050 adv_id = p2p->p2ps_prov->adv_id; 4051 adv_mac = p2p->p2ps_prov->adv_mac; 4052 } 4053 4054 if (p2p->cfg->prov_disc_fail) 4055 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, 4056 p2p->pending_pd_devaddr, 4057 for_join ? 4058 P2P_PROV_DISC_TIMEOUT_JOIN : 4059 P2P_PROV_DISC_TIMEOUT, 4060 adv_id, adv_mac, NULL); 4061 p2p_reset_pending_pd(p2p); 4062 } 4063} 4064 4065 4066static void p2p_timeout_invite(struct p2p_data *p2p) 4067{ 4068 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 4069 p2p_set_state(p2p, P2P_INVITE_LISTEN); 4070 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 4071 /* 4072 * Better remain on operating channel instead of listen channel 4073 * when running a group. 4074 */ 4075 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel"); 4076 p2p_set_timeout(p2p, 0, 100000); 4077 return; 4078 } 4079 p2p_listen_in_find(p2p, 0); 4080} 4081 4082 4083static void p2p_timeout_invite_listen(struct p2p_data *p2p) 4084{ 4085 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) { 4086 p2p_set_state(p2p, P2P_INVITE); 4087 p2p_invite_send(p2p, p2p->invite_peer, 4088 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id); 4089 } else { 4090 if (p2p->invite_peer) { 4091 p2p_dbg(p2p, "Invitation Request retry limit reached"); 4092 if (p2p->cfg->invitation_result) 4093 p2p->cfg->invitation_result( 4094 p2p->cfg->cb_ctx, -1, NULL, NULL, 4095 p2p->invite_peer->info.p2p_device_addr, 4096 0, 0); 4097 } 4098 p2p_set_state(p2p, P2P_IDLE); 4099 } 4100} 4101 4102 4103static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx) 4104{ 4105 struct p2p_data *p2p = eloop_ctx; 4106 4107 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state)); 4108 4109 p2p->in_listen = 0; 4110 if (p2p->drv_in_listen) { 4111 p2p_dbg(p2p, "Driver is still in listen state - stop it"); 4112 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 4113 } 4114 4115 switch (p2p->state) { 4116 case P2P_IDLE: 4117 /* Check if we timed out waiting for PD req */ 4118 if (p2p->pending_action_state == P2P_PENDING_PD) 4119 p2p_timeout_prov_disc_req(p2p); 4120 break; 4121 case P2P_SEARCH: 4122 /* Check if we timed out waiting for PD req */ 4123 if (p2p->pending_action_state == P2P_PENDING_PD) 4124 p2p_timeout_prov_disc_req(p2p); 4125 if (p2p->search_delay && !p2p->in_search_delay) { 4126 p2p_dbg(p2p, "Delay search operation by %u ms", 4127 p2p->search_delay); 4128 p2p->in_search_delay = 1; 4129 p2p_set_timeout(p2p, p2p->search_delay / 1000, 4130 (p2p->search_delay % 1000) * 1000); 4131 break; 4132 } 4133 p2p->in_search_delay = 0; 4134 p2p_search(p2p); 4135 break; 4136 case P2P_CONNECT: 4137 p2p_timeout_connect(p2p); 4138 break; 4139 case P2P_CONNECT_LISTEN: 4140 p2p_timeout_connect_listen(p2p); 4141 break; 4142 case P2P_GO_NEG: 4143 break; 4144 case P2P_LISTEN_ONLY: 4145 /* Check if we timed out waiting for PD req */ 4146 if (p2p->pending_action_state == P2P_PENDING_PD) 4147 p2p_timeout_prov_disc_req(p2p); 4148 4149 if (p2p->ext_listen_only) { 4150 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed"); 4151 p2p->ext_listen_only = 0; 4152 p2p_set_state(p2p, P2P_IDLE); 4153 } 4154 break; 4155 case P2P_WAIT_PEER_CONNECT: 4156 p2p_timeout_wait_peer_connect(p2p); 4157 break; 4158 case P2P_WAIT_PEER_IDLE: 4159 p2p_timeout_wait_peer_idle(p2p); 4160 break; 4161 case P2P_SD_DURING_FIND: 4162 p2p_timeout_sd_during_find(p2p); 4163 break; 4164 case P2P_PROVISIONING: 4165 break; 4166 case P2P_PD_DURING_FIND: 4167 p2p_timeout_prov_disc_during_find(p2p); 4168 break; 4169 case P2P_INVITE: 4170 p2p_timeout_invite(p2p); 4171 break; 4172 case P2P_INVITE_LISTEN: 4173 p2p_timeout_invite_listen(p2p); 4174 break; 4175 } 4176} 4177 4178 4179int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr) 4180{ 4181 struct p2p_device *dev; 4182 4183 dev = p2p_get_device(p2p, peer_addr); 4184 p2p_dbg(p2p, "Local request to reject connection attempts by peer " 4185 MACSTR, MAC2STR(peer_addr)); 4186 if (dev == NULL) { 4187 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr)); 4188 return -1; 4189 } 4190 dev->status = P2P_SC_FAIL_REJECTED_BY_USER; 4191 dev->flags |= P2P_DEV_USER_REJECTED; 4192 return 0; 4193} 4194 4195 4196const char * p2p_wps_method_text(enum p2p_wps_method method) 4197{ 4198 switch (method) { 4199 case WPS_NOT_READY: 4200 return "not-ready"; 4201 case WPS_PIN_DISPLAY: 4202 return "Display"; 4203 case WPS_PIN_KEYPAD: 4204 return "Keypad"; 4205 case WPS_PBC: 4206 return "PBC"; 4207 case WPS_NFC: 4208 return "NFC"; 4209 case WPS_P2PS: 4210 return "P2PS"; 4211 } 4212 4213 return "??"; 4214} 4215 4216 4217static const char * p2p_go_state_text(enum p2p_go_state go_state) 4218{ 4219 switch (go_state) { 4220 case UNKNOWN_GO: 4221 return "unknown"; 4222 case LOCAL_GO: 4223 return "local"; 4224 case REMOTE_GO: 4225 return "remote"; 4226 } 4227 4228 return "??"; 4229} 4230 4231 4232const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p, 4233 const u8 *addr, int next) 4234{ 4235 struct p2p_device *dev; 4236 4237 if (addr) 4238 dev = p2p_get_device(p2p, addr); 4239 else 4240 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4241 4242 if (dev && next) { 4243 dev = dl_list_first(&dev->list, struct p2p_device, list); 4244 if (&dev->list == &p2p->devices) 4245 dev = NULL; 4246 } 4247 4248 if (dev == NULL) 4249 return NULL; 4250 4251 return &dev->info; 4252} 4253 4254 4255int p2p_get_peer_info_txt(const struct p2p_peer_info *info, 4256 char *buf, size_t buflen) 4257{ 4258 struct p2p_device *dev; 4259 int res; 4260 char *pos, *end; 4261 struct os_reltime now; 4262 4263 if (info == NULL) 4264 return -1; 4265 4266 dev = (struct p2p_device *) (((u8 *) info) - 4267 offsetof(struct p2p_device, info)); 4268 4269 pos = buf; 4270 end = buf + buflen; 4271 4272 os_get_reltime(&now); 4273 res = os_snprintf(pos, end - pos, 4274 "age=%d\n" 4275 "listen_freq=%d\n" 4276 "wps_method=%s\n" 4277 "interface_addr=" MACSTR "\n" 4278 "member_in_go_dev=" MACSTR "\n" 4279 "member_in_go_iface=" MACSTR "\n" 4280 "go_neg_req_sent=%d\n" 4281 "go_state=%s\n" 4282 "dialog_token=%u\n" 4283 "intended_addr=" MACSTR "\n" 4284 "country=%c%c\n" 4285 "oper_freq=%d\n" 4286 "req_config_methods=0x%x\n" 4287 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n" 4288 "status=%d\n" 4289 "invitation_reqs=%u\n", 4290 (int) (now.sec - dev->last_seen.sec), 4291 dev->listen_freq, 4292 p2p_wps_method_text(dev->wps_method), 4293 MAC2STR(dev->interface_addr), 4294 MAC2STR(dev->member_in_go_dev), 4295 MAC2STR(dev->member_in_go_iface), 4296 dev->go_neg_req_sent, 4297 p2p_go_state_text(dev->go_state), 4298 dev->dialog_token, 4299 MAC2STR(dev->intended_addr), 4300 dev->country[0] ? dev->country[0] : '_', 4301 dev->country[1] ? dev->country[1] : '_', 4302 dev->oper_freq, 4303 dev->req_config_methods, 4304 dev->flags & P2P_DEV_PROBE_REQ_ONLY ? 4305 "[PROBE_REQ_ONLY]" : "", 4306 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "", 4307 dev->flags & P2P_DEV_NOT_YET_READY ? 4308 "[NOT_YET_READY]" : "", 4309 dev->flags & P2P_DEV_PD_PEER_DISPLAY ? 4310 "[PD_PEER_DISPLAY]" : "", 4311 dev->flags & P2P_DEV_PD_PEER_KEYPAD ? 4312 "[PD_PEER_KEYPAD]" : "", 4313 dev->flags & P2P_DEV_PD_PEER_P2PS ? 4314 "[PD_PEER_P2PS]" : "", 4315 dev->flags & P2P_DEV_USER_REJECTED ? 4316 "[USER_REJECTED]" : "", 4317 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ? 4318 "[PEER_WAITING_RESPONSE]" : "", 4319 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ? 4320 "[PREFER_PERSISTENT_GROUP]" : "", 4321 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ? 4322 "[WAIT_GO_NEG_RESPONSE]" : "", 4323 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ? 4324 "[WAIT_GO_NEG_CONFIRM]" : "", 4325 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ? 4326 "[GROUP_CLIENT_ONLY]" : "", 4327 dev->flags & P2P_DEV_FORCE_FREQ ? 4328 "[FORCE_FREQ]" : "", 4329 dev->flags & P2P_DEV_PD_FOR_JOIN ? 4330 "[PD_FOR_JOIN]" : "", 4331 dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT ? 4332 "[LAST_SEEN_AS_GROUP_CLIENT]" : "", 4333 dev->status, 4334 dev->invitation_reqs); 4335 if (os_snprintf_error(end - pos, res)) 4336 return pos - buf; 4337 pos += res; 4338 4339 if (dev->ext_listen_period) { 4340 res = os_snprintf(pos, end - pos, 4341 "ext_listen_period=%u\n" 4342 "ext_listen_interval=%u\n", 4343 dev->ext_listen_period, 4344 dev->ext_listen_interval); 4345 if (os_snprintf_error(end - pos, res)) 4346 return pos - buf; 4347 pos += res; 4348 } 4349 4350 if (dev->oper_ssid_len) { 4351 res = os_snprintf(pos, end - pos, 4352 "oper_ssid=%s\n", 4353 wpa_ssid_txt(dev->oper_ssid, 4354 dev->oper_ssid_len)); 4355 if (os_snprintf_error(end - pos, res)) 4356 return pos - buf; 4357 pos += res; 4358 } 4359 4360#ifdef CONFIG_WIFI_DISPLAY 4361 if (dev->info.wfd_subelems) { 4362 res = os_snprintf(pos, end - pos, "wfd_subelems="); 4363 if (os_snprintf_error(end - pos, res)) 4364 return pos - buf; 4365 pos += res; 4366 4367 pos += wpa_snprintf_hex(pos, end - pos, 4368 wpabuf_head(dev->info.wfd_subelems), 4369 wpabuf_len(dev->info.wfd_subelems)); 4370 4371 res = os_snprintf(pos, end - pos, "\n"); 4372 if (os_snprintf_error(end - pos, res)) 4373 return pos - buf; 4374 pos += res; 4375 } 4376#endif /* CONFIG_WIFI_DISPLAY */ 4377 4378 return pos - buf; 4379} 4380 4381 4382int p2p_peer_known(struct p2p_data *p2p, const u8 *addr) 4383{ 4384 return p2p_get_device(p2p, addr) != NULL; 4385} 4386 4387 4388void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled) 4389{ 4390 if (enabled) { 4391 p2p_dbg(p2p, "Client discoverability enabled"); 4392 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 4393 } else { 4394 p2p_dbg(p2p, "Client discoverability disabled"); 4395 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 4396 } 4397} 4398 4399 4400static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1, 4401 u32 duration2, u32 interval2) 4402{ 4403 struct wpabuf *req; 4404 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL; 4405 u8 *len; 4406 4407 req = wpabuf_alloc(100); 4408 if (req == NULL) 4409 return NULL; 4410 4411 if (duration1 || interval1) { 4412 os_memset(&desc1, 0, sizeof(desc1)); 4413 desc1.count_type = 1; 4414 desc1.duration = duration1; 4415 desc1.interval = interval1; 4416 ptr1 = &desc1; 4417 4418 if (duration2 || interval2) { 4419 os_memset(&desc2, 0, sizeof(desc2)); 4420 desc2.count_type = 2; 4421 desc2.duration = duration2; 4422 desc2.interval = interval2; 4423 ptr2 = &desc2; 4424 } 4425 } 4426 4427 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1); 4428 len = p2p_buf_add_ie_hdr(req); 4429 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2); 4430 p2p_buf_update_ie_hdr(req, len); 4431 4432 return req; 4433} 4434 4435 4436int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr, 4437 const u8 *own_interface_addr, unsigned int freq, 4438 u32 duration1, u32 interval1, u32 duration2, 4439 u32 interval2) 4440{ 4441 struct wpabuf *req; 4442 4443 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR 4444 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u " 4445 "dur2=%u int2=%u", 4446 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr), 4447 freq, duration1, interval1, duration2, interval2); 4448 4449 req = p2p_build_presence_req(duration1, interval1, duration2, 4450 interval2); 4451 if (req == NULL) 4452 return -1; 4453 4454 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 4455 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr, 4456 go_interface_addr, 4457 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 4458 p2p_dbg(p2p, "Failed to send Action frame"); 4459 } 4460 wpabuf_free(req); 4461 4462 return 0; 4463} 4464 4465 4466static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa, 4467 size_t noa_len, u8 dialog_token) 4468{ 4469 struct wpabuf *resp; 4470 u8 *len; 4471 4472 resp = wpabuf_alloc(100 + noa_len); 4473 if (resp == NULL) 4474 return NULL; 4475 4476 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token); 4477 len = p2p_buf_add_ie_hdr(resp); 4478 p2p_buf_add_status(resp, status); 4479 if (noa) { 4480 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE); 4481 wpabuf_put_le16(resp, noa_len); 4482 wpabuf_put_data(resp, noa, noa_len); 4483 } else 4484 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL); 4485 p2p_buf_update_ie_hdr(resp, len); 4486 4487 return resp; 4488} 4489 4490 4491static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 4492 const u8 *sa, const u8 *data, size_t len, 4493 int rx_freq) 4494{ 4495 struct p2p_message msg; 4496 u8 status; 4497 struct wpabuf *resp; 4498 size_t g; 4499 struct p2p_group *group = NULL; 4500 int parsed = 0; 4501 u8 noa[50]; 4502 int noa_len; 4503 4504 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request"); 4505 4506 for (g = 0; g < p2p->num_groups; g++) { 4507 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]), 4508 ETH_ALEN) == 0) { 4509 group = p2p->groups[g]; 4510 break; 4511 } 4512 } 4513 if (group == NULL) { 4514 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group " 4515 MACSTR, MAC2STR(da)); 4516 return; 4517 } 4518 4519 if (p2p_parse(data, len, &msg) < 0) { 4520 p2p_dbg(p2p, "Failed to parse P2P Presence Request"); 4521 status = P2P_SC_FAIL_INVALID_PARAMS; 4522 goto fail; 4523 } 4524 parsed = 1; 4525 4526 if (msg.noa == NULL) { 4527 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request"); 4528 status = P2P_SC_FAIL_INVALID_PARAMS; 4529 goto fail; 4530 } 4531 4532 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len); 4533 4534fail: 4535 if (p2p->cfg->get_noa) 4536 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa, 4537 sizeof(noa)); 4538 else 4539 noa_len = -1; 4540 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL, 4541 noa_len > 0 ? noa_len : 0, 4542 msg.dialog_token); 4543 if (parsed) 4544 p2p_parse_free(&msg); 4545 if (resp == NULL) 4546 return; 4547 4548 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 4549 if (p2p_send_action(p2p, rx_freq, sa, da, da, 4550 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 4551 p2p_dbg(p2p, "Failed to send Action frame"); 4552 } 4553 wpabuf_free(resp); 4554} 4555 4556 4557static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 4558 const u8 *sa, const u8 *data, size_t len) 4559{ 4560 struct p2p_message msg; 4561 4562 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response"); 4563 4564 if (p2p_parse(data, len, &msg) < 0) { 4565 p2p_dbg(p2p, "Failed to parse P2P Presence Response"); 4566 return; 4567 } 4568 4569 if (msg.status == NULL || msg.noa == NULL) { 4570 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response"); 4571 p2p_parse_free(&msg); 4572 return; 4573 } 4574 4575 if (p2p->cfg->presence_resp) { 4576 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status, 4577 msg.noa, msg.noa_len); 4578 } 4579 4580 if (*msg.status) { 4581 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u", 4582 *msg.status); 4583 p2p_parse_free(&msg); 4584 return; 4585 } 4586 4587 p2p_dbg(p2p, "P2P Presence Request was accepted"); 4588 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA", 4589 msg.noa, msg.noa_len); 4590 /* TODO: process NoA */ 4591 p2p_parse_free(&msg); 4592} 4593 4594 4595static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx) 4596{ 4597 struct p2p_data *p2p = eloop_ctx; 4598 4599 if (p2p->ext_listen_interval) { 4600 /* Schedule next extended listen timeout */ 4601 eloop_register_timeout(p2p->ext_listen_interval_sec, 4602 p2p->ext_listen_interval_usec, 4603 p2p_ext_listen_timeout, p2p, NULL); 4604 } 4605 4606 if ((p2p->cfg->is_p2p_in_progress && 4607 p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) || 4608 (p2p->pending_action_state == P2P_PENDING_PD && 4609 p2p->pd_retries > 0)) { 4610 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)", 4611 p2p_state_txt(p2p->state)); 4612 return; 4613 } 4614 4615 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) { 4616 /* 4617 * This should not really happen, but it looks like the Listen 4618 * command may fail is something else (e.g., a scan) was 4619 * running at an inconvenient time. As a workaround, allow new 4620 * Extended Listen operation to be started. 4621 */ 4622 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again"); 4623 p2p->ext_listen_only = 0; 4624 p2p_set_state(p2p, P2P_IDLE); 4625 } 4626 4627 if (p2p->state != P2P_IDLE) { 4628 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state)); 4629 return; 4630 } 4631 4632 p2p_dbg(p2p, "Extended Listen timeout"); 4633 p2p->ext_listen_only = 1; 4634 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) { 4635 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing"); 4636 p2p->ext_listen_only = 0; 4637 } 4638} 4639 4640 4641int p2p_ext_listen(struct p2p_data *p2p, unsigned int period, 4642 unsigned int interval) 4643{ 4644 if (period > 65535 || interval > 65535 || period > interval || 4645 (period == 0 && interval > 0) || (period > 0 && interval == 0)) { 4646 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u", 4647 period, interval); 4648 return -1; 4649 } 4650 4651 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 4652 4653 if (interval == 0) { 4654 p2p_dbg(p2p, "Disabling Extended Listen Timing"); 4655 p2p->ext_listen_period = 0; 4656 p2p->ext_listen_interval = 0; 4657 return 0; 4658 } 4659 4660 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec", 4661 period, interval); 4662 p2p->ext_listen_period = period; 4663 p2p->ext_listen_interval = interval; 4664 p2p->ext_listen_interval_sec = interval / 1000; 4665 p2p->ext_listen_interval_usec = (interval % 1000) * 1000; 4666 4667 eloop_register_timeout(p2p->ext_listen_interval_sec, 4668 p2p->ext_listen_interval_usec, 4669 p2p_ext_listen_timeout, p2p, NULL); 4670 4671 return 0; 4672} 4673 4674 4675void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 4676 const u8 *ie, size_t ie_len) 4677{ 4678 struct p2p_message msg; 4679 4680 if (bssid == NULL || ie == NULL) 4681 return; 4682 4683 os_memset(&msg, 0, sizeof(msg)); 4684 if (p2p_parse_ies(ie, ie_len, &msg)) 4685 return; 4686 if (msg.minor_reason_code == NULL) { 4687 p2p_parse_free(&msg); 4688 return; 4689 } 4690 4691 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR 4692 " reason_code=%u minor_reason_code=%u", 4693 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4694 4695 p2p_parse_free(&msg); 4696} 4697 4698 4699void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 4700 const u8 *ie, size_t ie_len) 4701{ 4702 struct p2p_message msg; 4703 4704 if (bssid == NULL || ie == NULL) 4705 return; 4706 4707 os_memset(&msg, 0, sizeof(msg)); 4708 if (p2p_parse_ies(ie, ie_len, &msg)) 4709 return; 4710 if (msg.minor_reason_code == NULL) { 4711 p2p_parse_free(&msg); 4712 return; 4713 } 4714 4715 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR 4716 " reason_code=%u minor_reason_code=%u", 4717 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4718 4719 p2p_parse_free(&msg); 4720} 4721 4722 4723void p2p_set_managed_oper(struct p2p_data *p2p, int enabled) 4724{ 4725 if (enabled) { 4726 p2p_dbg(p2p, "Managed P2P Device operations enabled"); 4727 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED; 4728 } else { 4729 p2p_dbg(p2p, "Managed P2P Device operations disabled"); 4730 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED; 4731 } 4732} 4733 4734 4735int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class, 4736 u8 *op_channel) 4737{ 4738 return p2p_channel_random_social(&p2p->channels, op_class, op_channel); 4739} 4740 4741 4742int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel, 4743 u8 forced) 4744{ 4745 if (p2p_channel_to_freq(reg_class, channel) < 0) 4746 return -1; 4747 4748 /* 4749 * Listen channel was set in configuration or set by control interface; 4750 * cannot override it. 4751 */ 4752 if (p2p->cfg->channel_forced && forced == 0) { 4753 p2p_dbg(p2p, 4754 "Listen channel was previously configured - do not override based on optimization"); 4755 return -1; 4756 } 4757 4758 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u", 4759 reg_class, channel); 4760 4761 if (p2p->state == P2P_IDLE) { 4762 p2p->cfg->reg_class = reg_class; 4763 p2p->cfg->channel = channel; 4764 p2p->cfg->channel_forced = forced; 4765 } else { 4766 p2p_dbg(p2p, "Defer setting listen channel"); 4767 p2p->pending_reg_class = reg_class; 4768 p2p->pending_channel = channel; 4769 p2p->pending_channel_forced = forced; 4770 } 4771 4772 return 0; 4773} 4774 4775 4776u8 p2p_get_listen_channel(struct p2p_data *p2p) 4777{ 4778 return p2p->cfg->channel; 4779} 4780 4781 4782int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len) 4783{ 4784 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len)); 4785 if (postfix == NULL) { 4786 p2p->cfg->ssid_postfix_len = 0; 4787 return 0; 4788 } 4789 if (len > sizeof(p2p->cfg->ssid_postfix)) 4790 return -1; 4791 os_memcpy(p2p->cfg->ssid_postfix, postfix, len); 4792 p2p->cfg->ssid_postfix_len = len; 4793 return 0; 4794} 4795 4796 4797int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel, 4798 int cfg_op_channel) 4799{ 4800 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0) 4801 return -1; 4802 4803 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u", 4804 op_reg_class, op_channel); 4805 p2p->cfg->op_reg_class = op_reg_class; 4806 p2p->cfg->op_channel = op_channel; 4807 p2p->cfg->cfg_op_channel = cfg_op_channel; 4808 return 0; 4809} 4810 4811 4812int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan, 4813 const struct p2p_channel *pref_chan) 4814{ 4815 struct p2p_channel *n; 4816 4817 if (pref_chan) { 4818 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel)); 4819 if (n == NULL) 4820 return -1; 4821 os_memcpy(n, pref_chan, 4822 num_pref_chan * sizeof(struct p2p_channel)); 4823 } else 4824 n = NULL; 4825 4826 os_free(p2p->cfg->pref_chan); 4827 p2p->cfg->pref_chan = n; 4828 p2p->cfg->num_pref_chan = num_pref_chan; 4829 4830 return 0; 4831} 4832 4833 4834int p2p_set_no_go_freq(struct p2p_data *p2p, 4835 const struct wpa_freq_range_list *list) 4836{ 4837 struct wpa_freq_range *tmp; 4838 4839 if (list == NULL || list->num == 0) { 4840 os_free(p2p->no_go_freq.range); 4841 p2p->no_go_freq.range = NULL; 4842 p2p->no_go_freq.num = 0; 4843 return 0; 4844 } 4845 4846 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range)); 4847 if (tmp == NULL) 4848 return -1; 4849 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range)); 4850 os_free(p2p->no_go_freq.range); 4851 p2p->no_go_freq.range = tmp; 4852 p2p->no_go_freq.num = list->num; 4853 p2p_dbg(p2p, "Updated no GO chan list"); 4854 4855 return 0; 4856} 4857 4858 4859int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr, 4860 u8 *iface_addr) 4861{ 4862 struct p2p_device *dev = p2p_get_device(p2p, dev_addr); 4863 if (dev == NULL || is_zero_ether_addr(dev->interface_addr)) 4864 return -1; 4865 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN); 4866 return 0; 4867} 4868 4869 4870int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr, 4871 u8 *dev_addr) 4872{ 4873 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4874 if (dev == NULL) 4875 return -1; 4876 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN); 4877 return 0; 4878} 4879 4880 4881void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr) 4882{ 4883 os_memcpy(p2p->peer_filter, addr, ETH_ALEN); 4884 if (is_zero_ether_addr(p2p->peer_filter)) 4885 p2p_dbg(p2p, "Disable peer filter"); 4886 else 4887 p2p_dbg(p2p, "Enable peer filter for " MACSTR, 4888 MAC2STR(p2p->peer_filter)); 4889} 4890 4891 4892void p2p_set_cross_connect(struct p2p_data *p2p, int enabled) 4893{ 4894 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled"); 4895 if (p2p->cross_connect == enabled) 4896 return; 4897 p2p->cross_connect = enabled; 4898 /* TODO: may need to tear down any action group where we are GO(?) */ 4899} 4900 4901 4902int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr) 4903{ 4904 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4905 if (dev == NULL) 4906 return -1; 4907 if (dev->oper_freq <= 0) 4908 return -1; 4909 return dev->oper_freq; 4910} 4911 4912 4913void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled) 4914{ 4915 p2p_dbg(p2p, "Intra BSS distribution %s", 4916 enabled ? "enabled" : "disabled"); 4917 p2p->cfg->p2p_intra_bss = enabled; 4918} 4919 4920 4921void p2p_update_channel_list(struct p2p_data *p2p, 4922 const struct p2p_channels *chan, 4923 const struct p2p_channels *cli_chan) 4924{ 4925 p2p_dbg(p2p, "Update channel list"); 4926 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels)); 4927 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 4928 os_memcpy(&p2p->cfg->cli_channels, cli_chan, 4929 sizeof(struct p2p_channels)); 4930 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 4931} 4932 4933 4934int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 4935 const u8 *src, const u8 *bssid, const u8 *buf, 4936 size_t len, unsigned int wait_time) 4937{ 4938 if (p2p->p2p_scan_running) { 4939 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes"); 4940 if (p2p->after_scan_tx) { 4941 p2p_dbg(p2p, "Dropped previous pending Action frame TX"); 4942 os_free(p2p->after_scan_tx); 4943 } 4944 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) + 4945 len); 4946 if (p2p->after_scan_tx == NULL) 4947 return -1; 4948 p2p->after_scan_tx->freq = freq; 4949 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN); 4950 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN); 4951 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN); 4952 p2p->after_scan_tx->len = len; 4953 p2p->after_scan_tx->wait_time = wait_time; 4954 os_memcpy(p2p->after_scan_tx + 1, buf, len); 4955 return 0; 4956 } 4957 4958 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid, 4959 buf, len, wait_time); 4960} 4961 4962 4963void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5, 4964 int freq_overall) 4965{ 4966 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d", 4967 freq_24, freq_5, freq_overall); 4968 p2p->best_freq_24 = freq_24; 4969 p2p->best_freq_5 = freq_5; 4970 p2p->best_freq_overall = freq_overall; 4971} 4972 4973 4974void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq) 4975{ 4976 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq); 4977 p2p->own_freq_preference = freq; 4978} 4979 4980 4981const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p) 4982{ 4983 if (p2p == NULL || p2p->go_neg_peer == NULL) 4984 return NULL; 4985 return p2p->go_neg_peer->info.p2p_device_addr; 4986} 4987 4988 4989const struct p2p_peer_info * 4990p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next) 4991{ 4992 struct p2p_device *dev; 4993 4994 if (addr) { 4995 dev = p2p_get_device(p2p, addr); 4996 if (!dev) 4997 return NULL; 4998 4999 if (!next) { 5000 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 5001 return NULL; 5002 5003 return &dev->info; 5004 } else { 5005 do { 5006 dev = dl_list_first(&dev->list, 5007 struct p2p_device, 5008 list); 5009 if (!dev || &dev->list == &p2p->devices) 5010 return NULL; 5011 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY); 5012 } 5013 } else { 5014 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 5015 if (!dev) 5016 return NULL; 5017 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 5018 dev = dl_list_first(&dev->list, 5019 struct p2p_device, 5020 list); 5021 if (!dev || &dev->list == &p2p->devices) 5022 return NULL; 5023 } 5024 } 5025 5026 return &dev->info; 5027} 5028 5029 5030int p2p_in_progress(struct p2p_data *p2p) 5031{ 5032 if (p2p == NULL) 5033 return 0; 5034 if (p2p->state == P2P_SEARCH) 5035 return 2; 5036 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING; 5037} 5038 5039 5040void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout, 5041 u8 client_timeout) 5042{ 5043 if (p2p) { 5044 p2p->go_timeout = go_timeout; 5045 p2p->client_timeout = client_timeout; 5046 } 5047} 5048 5049 5050#ifdef CONFIG_WIFI_DISPLAY 5051 5052static void p2p_update_wfd_ie_groups(struct p2p_data *p2p) 5053{ 5054 size_t g; 5055 struct p2p_group *group; 5056 5057 for (g = 0; g < p2p->num_groups; g++) { 5058 group = p2p->groups[g]; 5059 p2p_group_force_beacon_update_ies(group); 5060 } 5061} 5062 5063 5064int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie) 5065{ 5066 wpabuf_free(p2p->wfd_ie_beacon); 5067 p2p->wfd_ie_beacon = ie; 5068 p2p_update_wfd_ie_groups(p2p); 5069 return 0; 5070} 5071 5072 5073int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie) 5074{ 5075 wpabuf_free(p2p->wfd_ie_probe_req); 5076 p2p->wfd_ie_probe_req = ie; 5077 return 0; 5078} 5079 5080 5081int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie) 5082{ 5083 wpabuf_free(p2p->wfd_ie_probe_resp); 5084 p2p->wfd_ie_probe_resp = ie; 5085 p2p_update_wfd_ie_groups(p2p); 5086 return 0; 5087} 5088 5089 5090int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie) 5091{ 5092 wpabuf_free(p2p->wfd_ie_assoc_req); 5093 p2p->wfd_ie_assoc_req = ie; 5094 return 0; 5095} 5096 5097 5098int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie) 5099{ 5100 wpabuf_free(p2p->wfd_ie_invitation); 5101 p2p->wfd_ie_invitation = ie; 5102 return 0; 5103} 5104 5105 5106int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie) 5107{ 5108 wpabuf_free(p2p->wfd_ie_prov_disc_req); 5109 p2p->wfd_ie_prov_disc_req = ie; 5110 return 0; 5111} 5112 5113 5114int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie) 5115{ 5116 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 5117 p2p->wfd_ie_prov_disc_resp = ie; 5118 return 0; 5119} 5120 5121 5122int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie) 5123{ 5124 wpabuf_free(p2p->wfd_ie_go_neg); 5125 p2p->wfd_ie_go_neg = ie; 5126 return 0; 5127} 5128 5129 5130int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem) 5131{ 5132 wpabuf_free(p2p->wfd_dev_info); 5133 if (elem) { 5134 p2p->wfd_dev_info = wpabuf_dup(elem); 5135 if (p2p->wfd_dev_info == NULL) 5136 return -1; 5137 } else 5138 p2p->wfd_dev_info = NULL; 5139 5140 return 0; 5141} 5142 5143 5144int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem) 5145{ 5146 wpabuf_free(p2p->wfd_assoc_bssid); 5147 if (elem) { 5148 p2p->wfd_assoc_bssid = wpabuf_dup(elem); 5149 if (p2p->wfd_assoc_bssid == NULL) 5150 return -1; 5151 } else 5152 p2p->wfd_assoc_bssid = NULL; 5153 5154 return 0; 5155} 5156 5157 5158int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p, 5159 const struct wpabuf *elem) 5160{ 5161 wpabuf_free(p2p->wfd_coupled_sink_info); 5162 if (elem) { 5163 p2p->wfd_coupled_sink_info = wpabuf_dup(elem); 5164 if (p2p->wfd_coupled_sink_info == NULL) 5165 return -1; 5166 } else 5167 p2p->wfd_coupled_sink_info = NULL; 5168 5169 return 0; 5170} 5171 5172#endif /* CONFIG_WIFI_DISPLAY */ 5173 5174 5175int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int, 5176 int max_disc_tu) 5177{ 5178 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0) 5179 return -1; 5180 5181 p2p->min_disc_int = min_disc_int; 5182 p2p->max_disc_int = max_disc_int; 5183 p2p->max_disc_tu = max_disc_tu; 5184 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d", 5185 min_disc_int, max_disc_int, max_disc_tu); 5186 5187 return 0; 5188} 5189 5190 5191void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...) 5192{ 5193 va_list ap; 5194 char buf[500]; 5195 5196 if (!p2p->cfg->debug_print) 5197 return; 5198 5199 va_start(ap, fmt); 5200 vsnprintf(buf, sizeof(buf), fmt, ap); 5201 buf[sizeof(buf) - 1] = '\0'; 5202 va_end(ap); 5203 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf); 5204} 5205 5206 5207void p2p_info(struct p2p_data *p2p, const char *fmt, ...) 5208{ 5209 va_list ap; 5210 char buf[500]; 5211 5212 if (!p2p->cfg->debug_print) 5213 return; 5214 5215 va_start(ap, fmt); 5216 vsnprintf(buf, sizeof(buf), fmt, ap); 5217 buf[sizeof(buf) - 1] = '\0'; 5218 va_end(ap); 5219 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf); 5220} 5221 5222 5223void p2p_err(struct p2p_data *p2p, const char *fmt, ...) 5224{ 5225 va_list ap; 5226 char buf[500]; 5227 5228 if (!p2p->cfg->debug_print) 5229 return; 5230 5231 va_start(ap, fmt); 5232 vsnprintf(buf, sizeof(buf), fmt, ap); 5233 buf[sizeof(buf) - 1] = '\0'; 5234 va_end(ap); 5235 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf); 5236} 5237 5238 5239void p2p_loop_on_known_peers(struct p2p_data *p2p, 5240 void (*peer_callback)(struct p2p_peer_info *peer, 5241 void *user_data), 5242 void *user_data) 5243{ 5244 struct p2p_device *dev, *n; 5245 5246 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) { 5247 peer_callback(&dev->info, user_data); 5248 } 5249} 5250 5251 5252#ifdef CONFIG_WPS_NFC 5253 5254static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p, 5255 int client_freq, 5256 const u8 *go_dev_addr, 5257 const u8 *ssid, size_t ssid_len) 5258{ 5259 struct wpabuf *buf; 5260 u8 op_class, channel; 5261 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP; 5262 5263 buf = wpabuf_alloc(1000); 5264 if (buf == NULL) 5265 return NULL; 5266 5267 op_class = p2p->cfg->reg_class; 5268 channel = p2p->cfg->channel; 5269 5270 p2p_buf_add_capability(buf, p2p->dev_capab & 5271 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 5272 p2p_buf_add_device_info(buf, p2p, NULL); 5273 5274 if (p2p->num_groups > 0) { 5275 int freq = p2p_group_get_freq(p2p->groups[0]); 5276 role = P2P_GO_IN_A_GROUP; 5277 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) { 5278 p2p_dbg(p2p, 5279 "Unknown GO operating frequency %d MHz for NFC handover", 5280 freq); 5281 wpabuf_free(buf); 5282 return NULL; 5283 } 5284 } else if (client_freq > 0) { 5285 role = P2P_CLIENT_IN_A_GROUP; 5286 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) { 5287 p2p_dbg(p2p, 5288 "Unknown client operating frequency %d MHz for NFC handover", 5289 client_freq); 5290 wpabuf_free(buf); 5291 return NULL; 5292 } 5293 } 5294 5295 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class, 5296 channel, role); 5297 5298 if (p2p->num_groups > 0) { 5299 /* Limit number of clients to avoid very long message */ 5300 p2p_buf_add_group_info(p2p->groups[0], buf, 5); 5301 p2p_group_buf_add_id(p2p->groups[0], buf); 5302 } else if (client_freq > 0 && 5303 go_dev_addr && !is_zero_ether_addr(go_dev_addr) && 5304 ssid && ssid_len > 0) { 5305 /* 5306 * Add the optional P2P Group ID to indicate in which group this 5307 * device is a P2P Client. 5308 */ 5309 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len); 5310 } 5311 5312 return buf; 5313} 5314 5315 5316struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p, 5317 int client_freq, 5318 const u8 *go_dev_addr, 5319 const u8 *ssid, size_t ssid_len) 5320{ 5321 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 5322 ssid_len); 5323} 5324 5325 5326struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p, 5327 int client_freq, 5328 const u8 *go_dev_addr, 5329 const u8 *ssid, size_t ssid_len) 5330{ 5331 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 5332 ssid_len); 5333} 5334 5335 5336int p2p_process_nfc_connection_handover(struct p2p_data *p2p, 5337 struct p2p_nfc_params *params) 5338{ 5339 struct p2p_message msg; 5340 struct p2p_device *dev; 5341 const u8 *p2p_dev_addr; 5342 int freq; 5343 enum p2p_role_indication role; 5344 5345 params->next_step = NO_ACTION; 5346 5347 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len, 5348 params->p2p_attr, params->p2p_len, &msg)) { 5349 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC"); 5350 p2p_parse_free(&msg); 5351 return -1; 5352 } 5353 5354 if (msg.p2p_device_addr) 5355 p2p_dev_addr = msg.p2p_device_addr; 5356 else if (msg.device_id) 5357 p2p_dev_addr = msg.device_id; 5358 else { 5359 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 5360 p2p_parse_free(&msg); 5361 return -1; 5362 } 5363 5364 if (msg.oob_dev_password) { 5365 os_memcpy(params->oob_dev_pw, msg.oob_dev_password, 5366 msg.oob_dev_password_len); 5367 params->oob_dev_pw_len = msg.oob_dev_password_len; 5368 } 5369 5370 dev = p2p_create_device(p2p, p2p_dev_addr); 5371 if (dev == NULL) { 5372 p2p_parse_free(&msg); 5373 return -1; 5374 } 5375 5376 params->peer = &dev->info; 5377 5378 os_get_reltime(&dev->last_seen); 5379 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 5380 p2p_copy_wps_info(p2p, dev, 0, &msg); 5381 5382 if (!msg.oob_go_neg_channel) { 5383 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included"); 5384 p2p_parse_free(&msg); 5385 return -1; 5386 } 5387 5388 if (msg.oob_go_neg_channel[3] == 0 && 5389 msg.oob_go_neg_channel[4] == 0) 5390 freq = 0; 5391 else 5392 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3], 5393 msg.oob_go_neg_channel[4]); 5394 if (freq < 0) { 5395 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel"); 5396 p2p_parse_free(&msg); 5397 return -1; 5398 } 5399 role = msg.oob_go_neg_channel[5]; 5400 5401 if (role == P2P_GO_IN_A_GROUP) { 5402 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq); 5403 params->go_freq = freq; 5404 } else if (role == P2P_CLIENT_IN_A_GROUP) { 5405 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz", 5406 freq); 5407 params->go_freq = freq; 5408 } else 5409 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq); 5410 dev->oob_go_neg_freq = freq; 5411 5412 if (!params->sel && role != P2P_GO_IN_A_GROUP) { 5413 freq = p2p_channel_to_freq(p2p->cfg->reg_class, 5414 p2p->cfg->channel); 5415 if (freq < 0) { 5416 p2p_dbg(p2p, "Own listen channel not known"); 5417 p2p_parse_free(&msg); 5418 return -1; 5419 } 5420 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq); 5421 dev->oob_go_neg_freq = freq; 5422 } 5423 5424 if (msg.group_id) { 5425 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN); 5426 params->go_ssid_len = msg.group_id_len - ETH_ALEN; 5427 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN, 5428 params->go_ssid_len); 5429 } 5430 5431 if (dev->flags & P2P_DEV_USER_REJECTED) { 5432 p2p_dbg(p2p, "Do not report rejected device"); 5433 p2p_parse_free(&msg); 5434 return 0; 5435 } 5436 5437 if (!(dev->flags & P2P_DEV_REPORTED)) { 5438 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info, 5439 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 5440 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 5441 } 5442 p2p_parse_free(&msg); 5443 5444 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0) 5445 params->next_step = BOTH_GO; 5446 else if (role == P2P_GO_IN_A_GROUP) 5447 params->next_step = JOIN_GROUP; 5448 else if (role == P2P_CLIENT_IN_A_GROUP) { 5449 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 5450 params->next_step = PEER_CLIENT; 5451 } else if (p2p->num_groups > 0) 5452 params->next_step = AUTH_JOIN; 5453 else if (params->sel) 5454 params->next_step = INIT_GO_NEG; 5455 else 5456 params->next_step = RESP_GO_NEG; 5457 5458 return 0; 5459} 5460 5461 5462void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id, 5463 int go_intent, 5464 const u8 *own_interface_addr) 5465{ 5466 5467 p2p->authorized_oob_dev_pw_id = dev_pw_id; 5468 if (dev_pw_id == 0) { 5469 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover"); 5470 return; 5471 } 5472 5473 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover", 5474 dev_pw_id); 5475 5476 p2p->go_intent = go_intent; 5477 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 5478} 5479 5480#endif /* CONFIG_WPS_NFC */ 5481 5482 5483int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len) 5484{ 5485 if (len < 8 || len > 63) 5486 return -1; 5487 p2p->cfg->passphrase_len = len; 5488 return 0; 5489} 5490 5491 5492void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem) 5493{ 5494 p2p->vendor_elem = vendor_elem; 5495} 5496 5497 5498void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx) 5499{ 5500 struct p2p_data *p2p = eloop_ctx; 5501 5502 p2p_dbg(p2p, 5503 "Timeout on waiting peer to become ready for GO Negotiation"); 5504 p2p_go_neg_failed(p2p, -1); 5505} 5506 5507 5508void p2p_set_own_pref_freq_list(struct p2p_data *p2p, 5509 const unsigned int *pref_freq_list, 5510 unsigned int size) 5511{ 5512 unsigned int i; 5513 5514 if (size > P2P_MAX_PREF_CHANNELS) 5515 size = P2P_MAX_PREF_CHANNELS; 5516 p2p->num_pref_freq = size; 5517 for (i = 0; i < size; i++) { 5518 p2p->pref_freq_list[i] = pref_freq_list[i]; 5519 p2p_dbg(p2p, "Own preferred frequency list[%u]=%u MHz", 5520 i, p2p->pref_freq_list[i]); 5521 } 5522} 5523 5524 5525struct wpabuf * p2p_build_probe_resp_template(struct p2p_data *p2p, 5526 unsigned int freq) 5527{ 5528 struct wpabuf *ies, *buf; 5529 u8 addr[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 5530 int ret; 5531 5532 ies = p2p_build_probe_resp_ies(p2p, NULL, 0); 5533 if (!ies) { 5534 wpa_printf(MSG_ERROR, 5535 "CTRL: Failed to build Probe Response IEs"); 5536 return NULL; 5537 } 5538 5539 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 5540 if (!buf) { 5541 wpabuf_free(ies); 5542 return NULL; 5543 } 5544 5545 ret = p2p_build_probe_resp_buf(p2p, buf, ies, addr, freq); 5546 wpabuf_free(ies); 5547 if (ret) { 5548 wpabuf_free(buf); 5549 return NULL; 5550 } 5551 5552 return buf; 5553} 5554