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_pending_full && 1014 (p2p->find_type == P2P_FIND_PROGRESSIVE || 1015 p2p->find_type == P2P_FIND_START_WITH_FULL)) { 1016 type = P2P_SCAN_FULL; 1017 p2p_dbg(p2p, "Starting search (pending full scan)"); 1018 p2p->find_pending_full = 0; 1019 } else if ((p2p->find_type == P2P_FIND_PROGRESSIVE && 1020 (freq = p2p_get_next_prog_freq(p2p)) > 0) || 1021 (p2p->find_type == P2P_FIND_START_WITH_FULL && 1022 (freq = p2p->find_specified_freq) > 0)) { 1023 type = P2P_SCAN_SOCIAL_PLUS_ONE; 1024 p2p_dbg(p2p, "Starting search (+ freq %u)", freq); 1025 } else { 1026 type = P2P_SCAN_SOCIAL; 1027 p2p_dbg(p2p, "Starting search"); 1028 } 1029 1030 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq, 1031 p2p->num_req_dev_types, p2p->req_dev_types, 1032 p2p->find_dev_id, pw_id); 1033 if (res < 0) { 1034 p2p_dbg(p2p, "Scan request schedule failed"); 1035 p2p_continue_find(p2p); 1036 } 1037} 1038 1039 1040static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx) 1041{ 1042 struct p2p_data *p2p = eloop_ctx; 1043 p2p_dbg(p2p, "Find timeout -> stop"); 1044 p2p_stop_find(p2p); 1045} 1046 1047 1048void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status) 1049{ 1050 if (status != 0) { 1051 p2p_dbg(p2p, "Scan request failed"); 1052 /* Do continue find even for the first p2p_find_scan */ 1053 p2p_continue_find(p2p); 1054 } else { 1055 p2p_dbg(p2p, "Running p2p_scan"); 1056 p2p->p2p_scan_running = 1; 1057 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 1058 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 1059 p2p, NULL); 1060 } 1061} 1062 1063 1064static int p2p_run_after_scan(struct p2p_data *p2p) 1065{ 1066 struct p2p_device *dev; 1067 enum p2p_after_scan op; 1068 1069 op = p2p->start_after_scan; 1070 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1071 switch (op) { 1072 case P2P_AFTER_SCAN_NOTHING: 1073 break; 1074 case P2P_AFTER_SCAN_LISTEN: 1075 p2p_dbg(p2p, "Start previously requested Listen state"); 1076 p2p_listen(p2p, p2p->pending_listen_sec * 1000 + 1077 p2p->pending_listen_usec / 1000); 1078 return 1; 1079 case P2P_AFTER_SCAN_CONNECT: 1080 p2p_dbg(p2p, "Start previously requested connect with " MACSTR, 1081 MAC2STR(p2p->after_scan_peer)); 1082 dev = p2p_get_device(p2p, p2p->after_scan_peer); 1083 if (dev == NULL) { 1084 p2p_dbg(p2p, "Peer not known anymore"); 1085 break; 1086 } 1087 p2p_connect_send(p2p, dev); 1088 return 1; 1089 } 1090 1091 return 0; 1092} 1093 1094 1095static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx) 1096{ 1097 struct p2p_data *p2p = eloop_ctx; 1098 int running; 1099 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running); 1100 running = p2p->p2p_scan_running; 1101 /* Make sure we recover from missed scan results callback */ 1102 p2p->p2p_scan_running = 0; 1103 1104 if (running) 1105 p2p_run_after_scan(p2p); 1106} 1107 1108 1109static void p2p_free_req_dev_types(struct p2p_data *p2p) 1110{ 1111 p2p->num_req_dev_types = 0; 1112 os_free(p2p->req_dev_types); 1113 p2p->req_dev_types = NULL; 1114} 1115 1116 1117static int p2ps_gen_hash(struct p2p_data *p2p, const char *str, u8 *hash) 1118{ 1119 u8 buf[SHA256_MAC_LEN]; 1120 char str_buf[256]; 1121 const u8 *adv_array; 1122 size_t i, adv_len; 1123 1124 if (!str || !hash) 1125 return 0; 1126 1127 if (!str[0]) { 1128 os_memcpy(hash, p2p->wild_card_hash, P2PS_HASH_LEN); 1129 return 1; 1130 } 1131 1132 adv_array = (u8 *) str_buf; 1133 adv_len = os_strlen(str); 1134 if (adv_len >= sizeof(str_buf)) 1135 return 0; 1136 1137 for (i = 0; i < adv_len; i++) { 1138 if (str[i] >= 'A' && str[i] <= 'Z') 1139 str_buf[i] = str[i] - 'A' + 'a'; 1140 else 1141 str_buf[i] = str[i]; 1142 } 1143 1144 if (sha256_vector(1, &adv_array, &adv_len, buf)) 1145 return 0; 1146 1147 os_memcpy(hash, buf, P2PS_HASH_LEN); 1148 return 1; 1149} 1150 1151 1152int p2p_find(struct p2p_data *p2p, unsigned int timeout, 1153 enum p2p_discovery_type type, 1154 unsigned int num_req_dev_types, const u8 *req_dev_types, 1155 const u8 *dev_id, unsigned int search_delay, 1156 u8 seek_count, const char **seek, int freq) 1157{ 1158 int res; 1159 struct os_reltime start; 1160 1161 p2p_dbg(p2p, "Starting find (type=%d)", type); 1162 if (p2p->p2p_scan_running) { 1163 p2p_dbg(p2p, "p2p_scan is already running"); 1164 } 1165 1166 p2p_free_req_dev_types(p2p); 1167 if (req_dev_types && num_req_dev_types) { 1168 p2p->req_dev_types = os_memdup(req_dev_types, 1169 num_req_dev_types * 1170 WPS_DEV_TYPE_LEN); 1171 if (p2p->req_dev_types == NULL) 1172 return -1; 1173 p2p->num_req_dev_types = num_req_dev_types; 1174 } 1175 1176 if (dev_id) { 1177 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN); 1178 p2p->find_dev_id = p2p->find_dev_id_buf; 1179 } else 1180 p2p->find_dev_id = NULL; 1181 1182 if (seek_count == 0 || !seek) { 1183 /* Not an ASP search */ 1184 p2p->p2ps_seek = 0; 1185 } else if (seek_count == 1 && seek && (!seek[0] || !seek[0][0])) { 1186 /* 1187 * An empty seek string means no hash values, but still an ASP 1188 * search. 1189 */ 1190 p2p_dbg(p2p, "ASP search"); 1191 p2p->p2ps_seek_count = 0; 1192 p2p->p2ps_seek = 1; 1193 } else if (seek && seek_count <= P2P_MAX_QUERY_HASH) { 1194 u8 buf[P2PS_HASH_LEN]; 1195 int i, count = 0; 1196 1197 for (i = 0; i < seek_count; i++) { 1198 if (!p2ps_gen_hash(p2p, seek[i], buf)) 1199 continue; 1200 1201 p2p_dbg(p2p, "Seek service %s hash " MACSTR, 1202 seek[i], MAC2STR(buf)); 1203 os_memcpy(&p2p->p2ps_seek_hash[count * P2PS_HASH_LEN], 1204 buf, P2PS_HASH_LEN); 1205 count++; 1206 } 1207 1208 p2p->p2ps_seek_count = count; 1209 p2p->p2ps_seek = 1; 1210 } else { 1211 p2p->p2ps_seek_count = 0; 1212 p2p->p2ps_seek = 1; 1213 } 1214 1215 /* Special case to perform wildcard search */ 1216 if (p2p->p2ps_seek_count == 0 && p2p->p2ps_seek) { 1217 p2p->p2ps_seek_count = 1; 1218 os_memcpy(&p2p->p2ps_seek_hash, p2p->wild_card_hash, 1219 P2PS_HASH_LEN); 1220 } 1221 1222 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1223 p2p_clear_timeout(p2p); 1224 if (p2p->pending_listen_freq) { 1225 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_find"); 1226 p2p->pending_listen_freq = 0; 1227 } 1228 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1229 p2p->find_pending_full = 0; 1230 p2p->find_type = type; 1231 if (freq != 2412 && freq != 2437 && freq != 2462 && freq != 60480) 1232 p2p->find_specified_freq = freq; 1233 else 1234 p2p->find_specified_freq = 0; 1235 p2p_device_clear_reported(p2p); 1236 os_memset(p2p->sd_query_no_ack, 0, ETH_ALEN); 1237 p2p_set_state(p2p, P2P_SEARCH); 1238 p2p->search_delay = search_delay; 1239 p2p->in_search_delay = 0; 1240 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1241 p2p->last_p2p_find_timeout = timeout; 1242 if (timeout) 1243 eloop_register_timeout(timeout, 0, p2p_find_timeout, 1244 p2p, NULL); 1245 os_get_reltime(&start); 1246 switch (type) { 1247 case P2P_FIND_START_WITH_FULL: 1248 if (freq > 0) { 1249 /* 1250 * Start with the specified channel and then move to 1251 * scans for social channels and this specific channel. 1252 */ 1253 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, 1254 P2P_SCAN_SPECIFIC, freq, 1255 p2p->num_req_dev_types, 1256 p2p->req_dev_types, dev_id, 1257 DEV_PW_DEFAULT); 1258 break; 1259 } 1260 /* fall through */ 1261 case P2P_FIND_PROGRESSIVE: 1262 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0, 1263 p2p->num_req_dev_types, 1264 p2p->req_dev_types, dev_id, 1265 DEV_PW_DEFAULT); 1266 break; 1267 case P2P_FIND_ONLY_SOCIAL: 1268 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0, 1269 p2p->num_req_dev_types, 1270 p2p->req_dev_types, dev_id, 1271 DEV_PW_DEFAULT); 1272 break; 1273 default: 1274 return -1; 1275 } 1276 1277 if (!res) 1278 p2p->find_start = start; 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 if (type == P2P_FIND_PROGRESSIVE || 1284 (type == P2P_FIND_START_WITH_FULL && freq == 0)) 1285 p2p->find_pending_full = 1; 1286 res = 0; /* do not report failure */ 1287 } else if (res != 0) { 1288 p2p_dbg(p2p, "Failed to start p2p_scan"); 1289 p2p_set_state(p2p, P2P_IDLE); 1290 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1291 } 1292 1293 return res; 1294} 1295 1296 1297void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq) 1298{ 1299 p2p_dbg(p2p, "Stopping find"); 1300 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1301 p2p_clear_timeout(p2p); 1302 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND) 1303 p2p->cfg->find_stopped(p2p->cfg->cb_ctx); 1304 1305 p2p->p2ps_seek_count = 0; 1306 1307 p2p_set_state(p2p, P2P_IDLE); 1308 p2p_free_req_dev_types(p2p); 1309 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1310 if (p2p->go_neg_peer) 1311 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1312 p2p->go_neg_peer = NULL; 1313 p2p->sd_peer = NULL; 1314 p2p->invite_peer = NULL; 1315 p2p_stop_listen_for_freq(p2p, freq); 1316 p2p->send_action_in_progress = 0; 1317} 1318 1319 1320void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq) 1321{ 1322 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) { 1323 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response"); 1324 return; 1325 } 1326 if (p2p->in_listen) { 1327 p2p->in_listen = 0; 1328 p2p_clear_timeout(p2p); 1329 } 1330 if (p2p->drv_in_listen) { 1331 /* 1332 * The driver may not deliver callback to p2p_listen_end() 1333 * when the operation gets canceled, so clear the internal 1334 * variable that is tracking driver state. 1335 */ 1336 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen); 1337 p2p->drv_in_listen = 0; 1338 } 1339 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1340} 1341 1342 1343void p2p_stop_listen(struct p2p_data *p2p) 1344{ 1345 if (p2p->state != P2P_LISTEN_ONLY) { 1346 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state."); 1347 return; 1348 } 1349 1350 p2p_stop_listen_for_freq(p2p, 0); 1351 p2p_set_state(p2p, P2P_IDLE); 1352} 1353 1354 1355void p2p_stop_find(struct p2p_data *p2p) 1356{ 1357 p2p->pending_listen_freq = 0; 1358 p2p_stop_find_for_freq(p2p, 0); 1359} 1360 1361 1362static int p2p_prepare_channel_pref(struct p2p_data *p2p, 1363 unsigned int force_freq, 1364 unsigned int pref_freq, int go) 1365{ 1366 u8 op_class, op_channel; 1367 unsigned int freq = force_freq ? force_freq : pref_freq; 1368 1369 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d", 1370 force_freq, pref_freq, go); 1371 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) { 1372 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq); 1373 return -1; 1374 } 1375 1376 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) && 1377 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class, 1378 op_channel))) { 1379 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P", 1380 freq, op_class, op_channel); 1381 return -1; 1382 } 1383 1384 p2p->op_reg_class = op_class; 1385 p2p->op_channel = op_channel; 1386 1387 if (force_freq) { 1388 p2p->channels.reg_classes = 1; 1389 p2p->channels.reg_class[0].channels = 1; 1390 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 1391 p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 1392 } else { 1393 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1394 sizeof(struct p2p_channels)); 1395 } 1396 1397 return 0; 1398} 1399 1400 1401static void p2p_prepare_channel_best(struct p2p_data *p2p) 1402{ 1403 u8 op_class, op_channel; 1404 const int op_classes_5ghz[] = { 124, 125, 115, 0 }; 1405 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 }; 1406 const int op_classes_vht[] = { 128, 0 }; 1407 1408 p2p_dbg(p2p, "Prepare channel best"); 1409 1410 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 && 1411 p2p_supported_freq(p2p, p2p->best_freq_overall) && 1412 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel) 1413 == 0) { 1414 p2p_dbg(p2p, "Select best overall channel as operating channel preference"); 1415 p2p->op_reg_class = op_class; 1416 p2p->op_channel = op_channel; 1417 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 && 1418 p2p_supported_freq(p2p, p2p->best_freq_5) && 1419 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel) 1420 == 0) { 1421 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference"); 1422 p2p->op_reg_class = op_class; 1423 p2p->op_channel = op_channel; 1424 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 && 1425 p2p_supported_freq(p2p, p2p->best_freq_24) && 1426 p2p_freq_to_channel(p2p->best_freq_24, &op_class, 1427 &op_channel) == 0) { 1428 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference"); 1429 p2p->op_reg_class = op_class; 1430 p2p->op_channel = op_channel; 1431 } else if (p2p->cfg->num_pref_chan > 0 && 1432 p2p_channels_includes(&p2p->cfg->channels, 1433 p2p->cfg->pref_chan[0].op_class, 1434 p2p->cfg->pref_chan[0].chan)) { 1435 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference"); 1436 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class; 1437 p2p->op_channel = p2p->cfg->pref_chan[0].chan; 1438 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht, 1439 &p2p->op_reg_class, &p2p->op_channel) == 1440 0) { 1441 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference", 1442 p2p->op_reg_class, p2p->op_channel); 1443 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40, 1444 &p2p->op_reg_class, &p2p->op_channel) == 1445 0) { 1446 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference", 1447 p2p->op_reg_class, p2p->op_channel); 1448 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz, 1449 &p2p->op_reg_class, &p2p->op_channel) == 1450 0) { 1451 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference", 1452 p2p->op_reg_class, p2p->op_channel); 1453 } else if (p2p_channels_includes(&p2p->cfg->channels, 1454 p2p->cfg->op_reg_class, 1455 p2p->cfg->op_channel)) { 1456 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference"); 1457 p2p->op_reg_class = p2p->cfg->op_reg_class; 1458 p2p->op_channel = p2p->cfg->op_channel; 1459 } else if (p2p_channel_random_social(&p2p->cfg->channels, 1460 &p2p->op_reg_class, 1461 &p2p->op_channel, 1462 NULL, NULL) == 0) { 1463 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference", 1464 p2p->op_reg_class, p2p->op_channel); 1465 } else { 1466 /* Select any random available channel from the first available 1467 * operating class */ 1468 p2p_channel_select(&p2p->cfg->channels, NULL, 1469 &p2p->op_reg_class, 1470 &p2p->op_channel); 1471 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference", 1472 p2p->op_channel, p2p->op_reg_class); 1473 } 1474 1475 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1476 sizeof(struct p2p_channels)); 1477} 1478 1479 1480/** 1481 * p2p_prepare_channel - Select operating channel for GO Negotiation or P2PS PD 1482 * @p2p: P2P module context from p2p_init() 1483 * @dev: Selected peer device 1484 * @force_freq: Forced frequency in MHz or 0 if not forced 1485 * @pref_freq: Preferred frequency in MHz or 0 if no preference 1486 * @go: Whether the local end will be forced to be GO 1487 * Returns: 0 on success, -1 on failure (channel not supported for P2P) 1488 * 1489 * This function is used to do initial operating channel selection for GO 1490 * Negotiation prior to having received peer information or for P2PS PD 1491 * signalling. The selected channel may be further optimized in 1492 * p2p_reselect_channel() once the peer information is available. 1493 */ 1494int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev, 1495 unsigned int force_freq, unsigned int pref_freq, int go) 1496{ 1497 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d", 1498 force_freq, pref_freq, go); 1499 if (force_freq || pref_freq) { 1500 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) < 1501 0) 1502 return -1; 1503 } else { 1504 p2p_prepare_channel_best(p2p); 1505 } 1506 p2p_channels_dump(p2p, "prepared channels", &p2p->channels); 1507 if (go) 1508 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq); 1509 else if (!force_freq) 1510 p2p_channels_union_inplace(&p2p->channels, 1511 &p2p->cfg->cli_channels); 1512 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels); 1513 1514 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s", 1515 p2p->op_reg_class, p2p->op_channel, 1516 force_freq ? " (forced)" : ""); 1517 1518 if (force_freq) 1519 dev->flags |= P2P_DEV_FORCE_FREQ; 1520 else 1521 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1522 1523 return 0; 1524} 1525 1526 1527static void p2p_set_dev_persistent(struct p2p_device *dev, 1528 int persistent_group) 1529{ 1530 switch (persistent_group) { 1531 case 0: 1532 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP | 1533 P2P_DEV_PREFER_PERSISTENT_RECONN); 1534 break; 1535 case 1: 1536 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP; 1537 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN; 1538 break; 1539 case 2: 1540 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP | 1541 P2P_DEV_PREFER_PERSISTENT_RECONN; 1542 break; 1543 } 1544} 1545 1546 1547int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr, 1548 enum p2p_wps_method wps_method, 1549 int go_intent, const u8 *own_interface_addr, 1550 unsigned int force_freq, int persistent_group, 1551 const u8 *force_ssid, size_t force_ssid_len, 1552 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id) 1553{ 1554 struct p2p_device *dev; 1555 1556 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR 1557 " GO Intent=%d Intended Interface Address=" MACSTR 1558 " wps_method=%d persistent_group=%d pd_before_go_neg=%d " 1559 "oob_pw_id=%u", 1560 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1561 wps_method, persistent_group, pd_before_go_neg, oob_pw_id); 1562 1563 dev = p2p_get_device(p2p, peer_addr); 1564 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 1565 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR, 1566 MAC2STR(peer_addr)); 1567 return -1; 1568 } 1569 1570 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, 1571 go_intent == 15) < 0) 1572 return -1; 1573 1574 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 1575 if (!(dev->info.dev_capab & 1576 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 1577 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1578 " that is in a group and is not discoverable", 1579 MAC2STR(peer_addr)); 1580 return -1; 1581 } 1582 if (dev->oper_freq <= 0) { 1583 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1584 " with incomplete information", 1585 MAC2STR(peer_addr)); 1586 return -1; 1587 } 1588 1589 /* 1590 * First, try to connect directly. If the peer does not 1591 * acknowledge frames, assume it is sleeping and use device 1592 * discoverability via the GO at that point. 1593 */ 1594 } 1595 1596 p2p->ssid_set = 0; 1597 if (force_ssid) { 1598 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1599 force_ssid, force_ssid_len); 1600 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1601 p2p->ssid_len = force_ssid_len; 1602 p2p->ssid_set = 1; 1603 } 1604 1605 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1606 dev->flags &= ~P2P_DEV_USER_REJECTED; 1607 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 1608 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1609 if (pd_before_go_neg) 1610 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG; 1611 else { 1612 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG; 1613 /* 1614 * Assign dialog token and tie breaker here to use the same 1615 * values in each retry within the same GO Negotiation exchange. 1616 */ 1617 dev->dialog_token++; 1618 if (dev->dialog_token == 0) 1619 dev->dialog_token = 1; 1620 dev->tie_breaker = p2p->next_tie_breaker; 1621 p2p->next_tie_breaker = !p2p->next_tie_breaker; 1622 } 1623 dev->connect_reqs = 0; 1624 dev->go_neg_req_sent = 0; 1625 dev->go_state = UNKNOWN_GO; 1626 p2p_set_dev_persistent(dev, persistent_group); 1627 p2p->go_intent = go_intent; 1628 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1629 1630 if (p2p->state != P2P_IDLE) 1631 p2p_stop_find(p2p); 1632 1633 dev->wps_method = wps_method; 1634 dev->oob_pw_id = oob_pw_id; 1635 dev->status = P2P_SC_SUCCESS; 1636 1637 if (p2p->p2p_scan_running) { 1638 p2p_dbg(p2p, "p2p_scan running - delay connect send"); 1639 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT; 1640 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN); 1641 return 0; 1642 } 1643 1644 return p2p_connect_send(p2p, dev); 1645} 1646 1647 1648int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr, 1649 enum p2p_wps_method wps_method, 1650 int go_intent, const u8 *own_interface_addr, 1651 unsigned int force_freq, int persistent_group, 1652 const u8 *force_ssid, size_t force_ssid_len, 1653 unsigned int pref_freq, u16 oob_pw_id) 1654{ 1655 struct p2p_device *dev; 1656 1657 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR 1658 " GO Intent=%d Intended Interface Address=" MACSTR 1659 " wps_method=%d persistent_group=%d oob_pw_id=%u", 1660 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1661 wps_method, persistent_group, oob_pw_id); 1662 1663 dev = p2p_get_device(p2p, peer_addr); 1664 if (dev == NULL) { 1665 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR, 1666 MAC2STR(peer_addr)); 1667 return -1; 1668 } 1669 1670 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent == 1671 15) < 0) 1672 return -1; 1673 1674 p2p->ssid_set = 0; 1675 if (force_ssid) { 1676 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1677 force_ssid, force_ssid_len); 1678 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1679 p2p->ssid_len = force_ssid_len; 1680 p2p->ssid_set = 1; 1681 } 1682 1683 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1684 dev->flags &= ~P2P_DEV_USER_REJECTED; 1685 dev->go_neg_req_sent = 0; 1686 dev->go_state = UNKNOWN_GO; 1687 p2p_set_dev_persistent(dev, persistent_group); 1688 p2p->go_intent = go_intent; 1689 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1690 1691 dev->wps_method = wps_method; 1692 dev->oob_pw_id = oob_pw_id; 1693 dev->status = P2P_SC_SUCCESS; 1694 1695 return 0; 1696} 1697 1698 1699void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr, 1700 struct p2p_device *dev, struct p2p_message *msg) 1701{ 1702 os_get_reltime(&dev->last_seen); 1703 1704 p2p_copy_wps_info(p2p, dev, 0, msg); 1705 1706 if (msg->listen_channel) { 1707 int freq; 1708 freq = p2p_channel_to_freq(msg->listen_channel[3], 1709 msg->listen_channel[4]); 1710 if (freq < 0) { 1711 p2p_dbg(p2p, "Unknown peer Listen channel: " 1712 "country=%c%c(0x%02x) reg_class=%u channel=%u", 1713 msg->listen_channel[0], 1714 msg->listen_channel[1], 1715 msg->listen_channel[2], 1716 msg->listen_channel[3], 1717 msg->listen_channel[4]); 1718 } else { 1719 p2p_dbg(p2p, "Update peer " MACSTR 1720 " Listen channel: %u -> %u MHz", 1721 MAC2STR(dev->info.p2p_device_addr), 1722 dev->listen_freq, freq); 1723 dev->listen_freq = freq; 1724 } 1725 } 1726 1727 if (msg->wfd_subelems) { 1728 wpabuf_free(dev->info.wfd_subelems); 1729 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems); 1730 } 1731 1732 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 1733 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 1734 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request"); 1735 } else { 1736 p2p_dbg(p2p, "Created device entry based on GO Neg Req: " 1737 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' " 1738 "listen_freq=%d", 1739 MAC2STR(dev->info.p2p_device_addr), 1740 dev->info.dev_capab, dev->info.group_capab, 1741 dev->info.device_name, dev->listen_freq); 1742 } 1743 1744 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY; 1745 1746 if (dev->flags & P2P_DEV_USER_REJECTED) { 1747 p2p_dbg(p2p, "Do not report rejected device"); 1748 return; 1749 } 1750 1751 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 1752 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 1753 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 1754} 1755 1756 1757void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len) 1758{ 1759 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 1760 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2); 1761 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2], 1762 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len); 1763 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len; 1764} 1765 1766 1767int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params) 1768{ 1769 if (p2p->ssid_set) { 1770 os_memcpy(params->ssid, p2p->ssid, p2p->ssid_len); 1771 params->ssid_len = p2p->ssid_len; 1772 } else { 1773 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len); 1774 } 1775 p2p->ssid_set = 0; 1776 1777 p2p_random(params->passphrase, p2p->cfg->passphrase_len); 1778 return 0; 1779} 1780 1781 1782void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer) 1783{ 1784 struct p2p_go_neg_results res; 1785 int go = peer->go_state == LOCAL_GO; 1786 struct p2p_channels intersection; 1787 1788 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)", 1789 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer"); 1790 1791 os_memset(&res, 0, sizeof(res)); 1792 res.role_go = go; 1793 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 1794 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 1795 res.wps_method = peer->wps_method; 1796 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 1797 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 1798 res.persistent_group = 2; 1799 else 1800 res.persistent_group = 1; 1801 } 1802 1803 if (go) { 1804 /* Setup AP mode for WPS provisioning */ 1805 res.freq = p2p_channel_to_freq(p2p->op_reg_class, 1806 p2p->op_channel); 1807 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1808 res.ssid_len = p2p->ssid_len; 1809 p2p_random(res.passphrase, p2p->cfg->passphrase_len); 1810 } else { 1811 res.freq = peer->oper_freq; 1812 if (p2p->ssid_len) { 1813 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1814 res.ssid_len = p2p->ssid_len; 1815 } 1816 } 1817 1818 p2p_channels_dump(p2p, "own channels", &p2p->channels); 1819 p2p_channels_dump(p2p, "peer channels", &peer->channels); 1820 p2p_channels_intersect(&p2p->channels, &peer->channels, 1821 &intersection); 1822 if (go) { 1823 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq); 1824 p2p_channels_dump(p2p, "intersection after no-GO removal", 1825 &intersection); 1826 } 1827 1828 p2p_channels_to_freqs(&intersection, res.freq_list, 1829 P2P_MAX_CHANNELS); 1830 1831 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout; 1832 1833 p2p_clear_timeout(p2p); 1834 p2p->ssid_set = 0; 1835 peer->go_neg_req_sent = 0; 1836 peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1837 peer->wps_method = WPS_NOT_READY; 1838 peer->oob_pw_id = 0; 1839 wpabuf_free(peer->go_neg_conf); 1840 peer->go_neg_conf = NULL; 1841 1842 p2p_set_state(p2p, P2P_PROVISIONING); 1843 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 1844} 1845 1846 1847static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa, 1848 const u8 *data, size_t len, int rx_freq) 1849{ 1850 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa)); 1851 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len); 1852 1853 if (len < 1) 1854 return; 1855 1856 switch (data[0]) { 1857 case P2P_GO_NEG_REQ: 1858 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq); 1859 break; 1860 case P2P_GO_NEG_RESP: 1861 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq); 1862 break; 1863 case P2P_GO_NEG_CONF: 1864 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1); 1865 break; 1866 case P2P_INVITATION_REQ: 1867 p2p_process_invitation_req(p2p, sa, data + 1, len - 1, 1868 rx_freq); 1869 break; 1870 case P2P_INVITATION_RESP: 1871 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1); 1872 break; 1873 case P2P_PROV_DISC_REQ: 1874 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1875 break; 1876 case P2P_PROV_DISC_RESP: 1877 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1); 1878 break; 1879 case P2P_DEV_DISC_REQ: 1880 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1881 break; 1882 case P2P_DEV_DISC_RESP: 1883 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1); 1884 break; 1885 default: 1886 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d", 1887 data[0]); 1888 break; 1889 } 1890} 1891 1892 1893static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, 1894 const u8 *sa, const u8 *bssid, const u8 *data, 1895 size_t len, int freq) 1896{ 1897 if (len < 1) 1898 return; 1899 1900 switch (data[0]) { 1901 case WLAN_PA_VENDOR_SPECIFIC: 1902 data++; 1903 len--; 1904 if (len < 4) 1905 return; 1906 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1907 return; 1908 1909 data += 4; 1910 len -= 4; 1911 1912 p2p_rx_p2p_action(p2p, sa, data, len, freq); 1913 break; 1914 case WLAN_PA_GAS_INITIAL_REQ: 1915 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq); 1916 break; 1917 case WLAN_PA_GAS_INITIAL_RESP: 1918 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq); 1919 break; 1920 case WLAN_PA_GAS_COMEBACK_REQ: 1921 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq); 1922 break; 1923 case WLAN_PA_GAS_COMEBACK_RESP: 1924 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq); 1925 break; 1926 } 1927} 1928 1929 1930void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa, 1931 const u8 *bssid, u8 category, 1932 const u8 *data, size_t len, int freq) 1933{ 1934 if (category == WLAN_ACTION_PUBLIC) { 1935 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq); 1936 return; 1937 } 1938 1939 if (category != WLAN_ACTION_VENDOR_SPECIFIC) 1940 return; 1941 1942 if (len < 4) 1943 return; 1944 1945 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1946 return; 1947 data += 4; 1948 len -= 4; 1949 1950 /* P2P action frame */ 1951 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa)); 1952 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len); 1953 1954 if (len < 1) 1955 return; 1956 switch (data[0]) { 1957 case P2P_NOA: 1958 p2p_dbg(p2p, "Received P2P Action - Notice of Absence"); 1959 /* TODO */ 1960 break; 1961 case P2P_PRESENCE_REQ: 1962 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq); 1963 break; 1964 case P2P_PRESENCE_RESP: 1965 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1); 1966 break; 1967 case P2P_GO_DISC_REQ: 1968 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq); 1969 break; 1970 default: 1971 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]); 1972 break; 1973 } 1974} 1975 1976 1977static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx) 1978{ 1979 struct p2p_data *p2p = eloop_ctx; 1980 if (p2p->go_neg_peer == NULL) 1981 return; 1982 if (p2p->pending_listen_freq) { 1983 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start"); 1984 p2p->pending_listen_freq = 0; 1985 } 1986 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1987 p2p->go_neg_peer->status = P2P_SC_SUCCESS; 1988 /* 1989 * Set new timeout to make sure a previously set one does not expire 1990 * too quickly while waiting for the GO Negotiation to complete. 1991 */ 1992 p2p_set_timeout(p2p, 0, 500000); 1993 p2p_connect_send(p2p, p2p->go_neg_peer); 1994} 1995 1996 1997static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx) 1998{ 1999 struct p2p_data *p2p = eloop_ctx; 2000 if (p2p->invite_peer == NULL) 2001 return; 2002 if (p2p->pending_listen_freq) { 2003 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start"); 2004 p2p->pending_listen_freq = 0; 2005 } 2006 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 2007 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr, 2008 p2p->invite_dev_pw_id); 2009} 2010 2011 2012static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr, 2013 const u8 *ie, size_t ie_len) 2014{ 2015 struct p2p_message msg; 2016 struct p2p_device *dev; 2017 2018 os_memset(&msg, 0, sizeof(msg)); 2019 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL) 2020 { 2021 p2p_parse_free(&msg); 2022 return; /* not a P2P probe */ 2023 } 2024 2025 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 2026 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 2027 != 0) { 2028 /* The Probe Request is not part of P2P Device Discovery. It is 2029 * not known whether the source address of the frame is the P2P 2030 * Device Address or P2P Interface Address. Do not add a new 2031 * peer entry based on this frames. 2032 */ 2033 p2p_parse_free(&msg); 2034 return; 2035 } 2036 2037 dev = p2p_get_device(p2p, addr); 2038 if (dev) { 2039 if (msg.listen_channel) { 2040 int freq; 2041 2042 if (dev->country[0] == 0) 2043 os_memcpy(dev->country, msg.listen_channel, 3); 2044 2045 freq = p2p_channel_to_freq(msg.listen_channel[3], 2046 msg.listen_channel[4]); 2047 2048 if (freq > 0 && dev->listen_freq != freq) { 2049 p2p_dbg(p2p, 2050 "Updated peer " MACSTR " Listen channel (Probe Request): %d -> %d MHz", 2051 MAC2STR(addr), dev->listen_freq, freq); 2052 dev->listen_freq = freq; 2053 } 2054 } 2055 2056 os_get_reltime(&dev->last_seen); 2057 p2p_parse_free(&msg); 2058 return; /* already known */ 2059 } 2060 2061 dev = p2p_create_device(p2p, addr); 2062 if (dev == NULL) { 2063 p2p_parse_free(&msg); 2064 return; 2065 } 2066 2067 os_get_reltime(&dev->last_seen); 2068 dev->flags |= P2P_DEV_PROBE_REQ_ONLY; 2069 2070 if (msg.listen_channel) { 2071 os_memcpy(dev->country, msg.listen_channel, 3); 2072 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3], 2073 msg.listen_channel[4]); 2074 } 2075 2076 p2p_copy_wps_info(p2p, dev, 1, &msg); 2077 2078 if (msg.wfd_subelems) { 2079 wpabuf_free(dev->info.wfd_subelems); 2080 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 2081 } 2082 2083 p2p_parse_free(&msg); 2084 2085 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR 2086 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d", 2087 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab, 2088 dev->info.group_capab, dev->info.device_name, 2089 dev->listen_freq); 2090} 2091 2092 2093struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p, 2094 const u8 *addr, 2095 struct p2p_message *msg) 2096{ 2097 struct p2p_device *dev; 2098 2099 dev = p2p_get_device(p2p, addr); 2100 if (dev) { 2101 os_get_reltime(&dev->last_seen); 2102 return dev; /* already known */ 2103 } 2104 2105 dev = p2p_create_device(p2p, addr); 2106 if (dev == NULL) 2107 return NULL; 2108 2109 p2p_add_dev_info(p2p, addr, dev, msg); 2110 2111 return dev; 2112} 2113 2114 2115static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type) 2116{ 2117 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0) 2118 return 1; 2119 if (os_memcmp(dev_type, req_dev_type, 2) == 0 && 2120 WPA_GET_BE32(&req_dev_type[2]) == 0 && 2121 WPA_GET_BE16(&req_dev_type[6]) == 0) 2122 return 1; /* Category match with wildcard OUI/sub-category */ 2123 return 0; 2124} 2125 2126 2127int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[], 2128 size_t num_req_dev_type) 2129{ 2130 size_t i; 2131 for (i = 0; i < num_req_dev_type; i++) { 2132 if (dev_type_match(dev_type, req_dev_type[i])) 2133 return 1; 2134 } 2135 return 0; 2136} 2137 2138 2139/** 2140 * p2p_match_dev_type - Match local device type with requested type 2141 * @p2p: P2P module context from p2p_init() 2142 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) 2143 * Returns: 1 on match, 0 on mismatch 2144 * 2145 * This function can be used to match the Requested Device Type attribute in 2146 * WPS IE with the local device types for deciding whether to reply to a Probe 2147 * Request frame. 2148 */ 2149int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps) 2150{ 2151 struct wps_parse_attr attr; 2152 size_t i; 2153 2154 if (wps_parse_msg(wps, &attr)) 2155 return 1; /* assume no Requested Device Type attributes */ 2156 2157 if (attr.num_req_dev_type == 0) 2158 return 1; /* no Requested Device Type attributes -> match */ 2159 2160 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type, 2161 attr.num_req_dev_type)) 2162 return 1; /* Own Primary Device Type matches */ 2163 2164 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) { 2165 if (dev_type_list_match(p2p->cfg->sec_dev_type[i], 2166 attr.req_dev_type, 2167 attr.num_req_dev_type)) 2168 return 1; /* Own Secondary Device Type matches */ 2169 } 2170 2171 /* No matching device type found */ 2172 return 0; 2173} 2174 2175 2176struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p, 2177 const u8 *query_hash, 2178 u8 query_count) 2179{ 2180 struct wpabuf *buf; 2181 u8 *len; 2182 int pw_id = -1; 2183 size_t extra = 0; 2184 2185#ifdef CONFIG_WIFI_DISPLAY 2186 if (p2p->wfd_ie_probe_resp) 2187 extra = wpabuf_len(p2p->wfd_ie_probe_resp); 2188#endif /* CONFIG_WIFI_DISPLAY */ 2189 2190 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]) 2191 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]); 2192 2193 if (query_count) 2194 extra += MAX_SVC_ADV_IE_LEN; 2195 2196 buf = wpabuf_alloc(1000 + extra); 2197 if (buf == NULL) 2198 return NULL; 2199 2200 if (p2p->go_neg_peer) { 2201 /* Advertise immediate availability of WPS credential */ 2202 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method); 2203 } 2204 2205 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) { 2206 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response"); 2207 wpabuf_free(buf); 2208 return NULL; 2209 } 2210 2211#ifdef CONFIG_WIFI_DISPLAY 2212 if (p2p->wfd_ie_probe_resp) 2213 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp); 2214#endif /* CONFIG_WIFI_DISPLAY */ 2215 2216 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]) 2217 wpabuf_put_buf(buf, 2218 p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]); 2219 2220 /* P2P IE */ 2221 len = p2p_buf_add_ie_hdr(buf); 2222 p2p_buf_add_capability(buf, p2p->dev_capab & 2223 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2224 if (p2p->ext_listen_interval) 2225 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 2226 p2p->ext_listen_interval); 2227 p2p_buf_add_device_info(buf, p2p, NULL); 2228 p2p_buf_update_ie_hdr(buf, len); 2229 2230 if (query_count) { 2231 p2p_buf_add_service_instance(buf, p2p, query_count, query_hash, 2232 p2p->p2ps_adv_list); 2233 } 2234 2235 return buf; 2236} 2237 2238static int p2p_build_probe_resp_buf(struct p2p_data *p2p, struct wpabuf *buf, 2239 struct wpabuf *ies, 2240 const u8 *addr, int rx_freq) 2241{ 2242 struct ieee80211_mgmt *resp; 2243 u8 channel, op_class; 2244 2245 resp = wpabuf_put(buf, offsetof(struct ieee80211_mgmt, 2246 u.probe_resp.variable)); 2247 2248 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 2249 (WLAN_FC_STYPE_PROBE_RESP << 4)); 2250 os_memcpy(resp->da, addr, ETH_ALEN); 2251 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN); 2252 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN); 2253 resp->u.probe_resp.beacon_int = host_to_le16(100); 2254 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 2255 resp->u.probe_resp.capab_info = 2256 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE | 2257 WLAN_CAPABILITY_PRIVACY | 2258 WLAN_CAPABILITY_SHORT_SLOT_TIME); 2259 2260 wpabuf_put_u8(buf, WLAN_EID_SSID); 2261 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN); 2262 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 2263 2264 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES); 2265 wpabuf_put_u8(buf, 8); 2266 wpabuf_put_u8(buf, (60 / 5) | 0x80); 2267 wpabuf_put_u8(buf, 90 / 5); 2268 wpabuf_put_u8(buf, (120 / 5) | 0x80); 2269 wpabuf_put_u8(buf, 180 / 5); 2270 wpabuf_put_u8(buf, (240 / 5) | 0x80); 2271 wpabuf_put_u8(buf, 360 / 5); 2272 wpabuf_put_u8(buf, 480 / 5); 2273 wpabuf_put_u8(buf, 540 / 5); 2274 2275 if (!rx_freq) { 2276 channel = p2p->cfg->channel; 2277 } else if (p2p_freq_to_channel(rx_freq, &op_class, &channel)) { 2278 p2p_err(p2p, "Failed to convert freq to channel"); 2279 return -1; 2280 } 2281 2282 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS); 2283 wpabuf_put_u8(buf, 1); 2284 wpabuf_put_u8(buf, channel); 2285 2286 wpabuf_put_buf(buf, ies); 2287 2288 return 0; 2289} 2290 2291static int p2p_service_find_asp(struct p2p_data *p2p, const u8 *hash) 2292{ 2293 struct p2ps_advertisement *adv_data; 2294 int any_wfa; 2295 2296 p2p_dbg(p2p, "ASP find - ASP list: %p", p2p->p2ps_adv_list); 2297 2298 /* Wildcard org.wi-fi.wfds matches any WFA spec defined service */ 2299 any_wfa = os_memcmp(hash, p2p->wild_card_hash, P2PS_HASH_LEN) == 0; 2300 2301 adv_data = p2p->p2ps_adv_list; 2302 while (adv_data) { 2303 if (os_memcmp(hash, adv_data->hash, P2PS_HASH_LEN) == 0) 2304 return 1; /* exact hash match */ 2305 if (any_wfa && 2306 os_strncmp(adv_data->svc_name, P2PS_WILD_HASH_STR, 2307 os_strlen(P2PS_WILD_HASH_STR)) == 0) 2308 return 1; /* WFA service match */ 2309 adv_data = adv_data->next; 2310 } 2311 2312 return 0; 2313} 2314 2315 2316static enum p2p_probe_req_status 2317p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2318 const u8 *bssid, const u8 *ie, size_t ie_len, 2319 unsigned int rx_freq) 2320{ 2321 struct ieee802_11_elems elems; 2322 struct wpabuf *buf; 2323 struct p2p_message msg; 2324 struct wpabuf *ies; 2325 2326 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) == 2327 ParseFailed) { 2328 /* Ignore invalid Probe Request frames */ 2329 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it"); 2330 return P2P_PREQ_MALFORMED; 2331 } 2332 2333 if (elems.p2p == NULL) { 2334 /* not a P2P probe - ignore it */ 2335 p2p_dbg(p2p, "Not a P2P probe - ignore it"); 2336 return P2P_PREQ_NOT_P2P; 2337 } 2338 2339 if (dst && !is_broadcast_ether_addr(dst) && 2340 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2341 /* Not sent to the broadcast address or our P2P Device Address 2342 */ 2343 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it", 2344 MAC2STR(dst)); 2345 return P2P_PREQ_NOT_PROCESSED; 2346 } 2347 2348 if (bssid && !is_broadcast_ether_addr(bssid)) { 2349 /* Not sent to the Wildcard BSSID */ 2350 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it", 2351 MAC2STR(bssid)); 2352 return P2P_PREQ_NOT_PROCESSED; 2353 } 2354 2355 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN || 2356 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) != 2357 0) { 2358 /* not using P2P Wildcard SSID - ignore */ 2359 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it"); 2360 return P2P_PREQ_NOT_PROCESSED; 2361 } 2362 2363 if (supp_rates_11b_only(&elems)) { 2364 /* Indicates support for 11b rates only */ 2365 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it"); 2366 return P2P_PREQ_NOT_P2P; 2367 } 2368 2369 os_memset(&msg, 0, sizeof(msg)); 2370 if (p2p_parse_ies(ie, ie_len, &msg) < 0) { 2371 /* Could not parse P2P attributes */ 2372 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it"); 2373 return P2P_PREQ_NOT_P2P; 2374 } 2375 2376 if (msg.service_hash && msg.service_hash_count) { 2377 const u8 *hash = msg.service_hash; 2378 u8 i; 2379 int p2ps_svc_found = 0; 2380 2381 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", 2382 p2p->in_listen, p2p->drv_in_listen, rx_freq, 2383 p2p->cfg->channel, p2p->pending_listen_freq); 2384 2385 if (!p2p->in_listen && !p2p->drv_in_listen && 2386 p2p->pending_listen_freq && rx_freq && 2387 rx_freq != p2p->pending_listen_freq) { 2388 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", 2389 rx_freq, p2p->pending_listen_freq); 2390 p2p_parse_free(&msg); 2391 return P2P_PREQ_NOT_LISTEN; 2392 } 2393 2394 for (i = 0; i < msg.service_hash_count; i++) { 2395 if (p2p_service_find_asp(p2p, hash)) { 2396 p2p_dbg(p2p, "Service Hash match found: " 2397 MACSTR, MAC2STR(hash)); 2398 p2ps_svc_found = 1; 2399 break; 2400 } 2401 hash += P2PS_HASH_LEN; 2402 } 2403 2404 /* Probed hash unknown */ 2405 if (!p2ps_svc_found) { 2406 p2p_dbg(p2p, "No Service Hash match found"); 2407 p2p_parse_free(&msg); 2408 return P2P_PREQ_NOT_PROCESSED; 2409 } 2410 } else { 2411 /* This is not a P2PS Probe Request */ 2412 p2p_dbg(p2p, "No P2PS Hash in Probe Request"); 2413 2414 if (!p2p->in_listen || !p2p->drv_in_listen) { 2415 /* not in Listen state - ignore Probe Request */ 2416 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request", 2417 p2p->in_listen, p2p->drv_in_listen); 2418 p2p_parse_free(&msg); 2419 return P2P_PREQ_NOT_LISTEN; 2420 } 2421 } 2422 2423 if (msg.device_id && 2424 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2425 /* Device ID did not match */ 2426 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it", 2427 MAC2STR(msg.device_id)); 2428 p2p_parse_free(&msg); 2429 return P2P_PREQ_NOT_PROCESSED; 2430 } 2431 2432 /* Check Requested Device Type match */ 2433 if (msg.wps_attributes && 2434 !p2p_match_dev_type(p2p, msg.wps_attributes)) { 2435 /* No match with Requested Device Type */ 2436 p2p_dbg(p2p, "Probe Req requested Device Type did not match - ignore it"); 2437 p2p_parse_free(&msg); 2438 return P2P_PREQ_NOT_PROCESSED; 2439 } 2440 2441 if (!p2p->cfg->send_probe_resp) { 2442 /* Response generated elsewhere */ 2443 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response"); 2444 p2p_parse_free(&msg); 2445 return P2P_PREQ_NOT_PROCESSED; 2446 } 2447 2448 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state"); 2449 2450 /* 2451 * We do not really have a specific BSS that this frame is advertising, 2452 * so build a frame that has some information in valid format. This is 2453 * really only used for discovery purposes, not to learn exact BSS 2454 * parameters. 2455 */ 2456 ies = p2p_build_probe_resp_ies(p2p, msg.service_hash, 2457 msg.service_hash_count); 2458 p2p_parse_free(&msg); 2459 if (ies == NULL) 2460 return P2P_PREQ_NOT_PROCESSED; 2461 2462 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 2463 if (buf == NULL) { 2464 wpabuf_free(ies); 2465 return P2P_PREQ_NOT_PROCESSED; 2466 } 2467 2468 if (p2p_build_probe_resp_buf(p2p, buf, ies, addr, rx_freq)) { 2469 wpabuf_free(ies); 2470 wpabuf_free(buf); 2471 return P2P_PREQ_NOT_PROCESSED; 2472 } 2473 2474 wpabuf_free(ies); 2475 2476 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf, rx_freq); 2477 2478 wpabuf_free(buf); 2479 2480 return P2P_PREQ_PROCESSED; 2481} 2482 2483 2484enum p2p_probe_req_status 2485p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2486 const u8 *bssid, const u8 *ie, size_t ie_len, 2487 unsigned int rx_freq, int p2p_lo_started) 2488{ 2489 enum p2p_probe_req_status res; 2490 2491 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len); 2492 2493 if (p2p_lo_started) { 2494 p2p_dbg(p2p, 2495 "Probe Response is offloaded, do not reply Probe Request"); 2496 return P2P_PREQ_PROCESSED; 2497 } 2498 2499 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len, rx_freq); 2500 if (res != P2P_PREQ_PROCESSED && res != P2P_PREQ_NOT_PROCESSED) 2501 return res; 2502 2503 /* 2504 * Activate a pending GO Negotiation/Invite flow if a received Probe 2505 * Request frame is from an expected peer. Some devices may share the 2506 * same address for P2P and non-P2P STA running simultaneously. The 2507 * P2P_PREQ_PROCESSED and P2P_PREQ_NOT_PROCESSED p2p_reply_probe() 2508 * return values verified above ensure we are handling a Probe Request 2509 * frame from a P2P peer. 2510 */ 2511 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) && 2512 p2p->go_neg_peer && 2513 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN) 2514 == 0 && 2515 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 2516 /* Received a Probe Request from GO Negotiation peer */ 2517 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout"); 2518 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2519 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL); 2520 return res; 2521 } 2522 2523 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) && 2524 p2p->invite_peer && 2525 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) && 2526 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN) 2527 == 0) { 2528 /* Received a Probe Request from Invite peer */ 2529 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout"); 2530 eloop_cancel_timeout(p2p_invite_start, p2p, NULL); 2531 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL); 2532 return res; 2533 } 2534 2535 return res; 2536} 2537 2538 2539static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid, 2540 u8 *buf, size_t len, struct wpabuf *p2p_ie) 2541{ 2542 struct wpabuf *tmp; 2543 u8 *lpos; 2544 size_t tmplen; 2545 int res; 2546 u8 group_capab; 2547 struct p2p_message msg; 2548 2549 if (p2p_ie == NULL) 2550 return 0; /* WLAN AP is not a P2P manager */ 2551 2552 os_memset(&msg, 0, sizeof(msg)); 2553 if (p2p_parse_p2p_ie(p2p_ie, &msg) < 0) 2554 return 0; 2555 2556 p2p_dbg(p2p, "BSS P2P manageability %s", 2557 msg.manageability ? "enabled" : "disabled"); 2558 2559 if (!msg.manageability) 2560 return 0; 2561 2562 /* 2563 * (Re)Association Request - P2P IE 2564 * P2P Capability attribute (shall be present) 2565 * P2P Interface attribute (present if concurrent device and 2566 * P2P Management is enabled) 2567 */ 2568 tmp = wpabuf_alloc(200); 2569 if (tmp == NULL) 2570 return -1; 2571 2572 lpos = p2p_buf_add_ie_hdr(tmp); 2573 group_capab = 0; 2574 if (p2p->num_groups > 0) { 2575 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; 2576 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2577 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) && 2578 p2p->cross_connect) 2579 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 2580 } 2581 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab); 2582 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2583 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED)) 2584 p2p_buf_add_p2p_interface(tmp, p2p); 2585 p2p_buf_update_ie_hdr(tmp, lpos); 2586 2587 tmplen = wpabuf_len(tmp); 2588 if (tmplen > len) 2589 res = -1; 2590 else { 2591 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2592 res = tmplen; 2593 } 2594 wpabuf_free(tmp); 2595 2596 return res; 2597} 2598 2599 2600int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf, 2601 size_t len, int p2p_group, struct wpabuf *p2p_ie) 2602{ 2603 struct wpabuf *tmp; 2604 u8 *lpos; 2605 struct p2p_device *peer; 2606 size_t tmplen; 2607 int res; 2608 size_t extra = 0; 2609 2610 if (!p2p_group) 2611 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie); 2612 2613#ifdef CONFIG_WIFI_DISPLAY 2614 if (p2p->wfd_ie_assoc_req) 2615 extra = wpabuf_len(p2p->wfd_ie_assoc_req); 2616#endif /* CONFIG_WIFI_DISPLAY */ 2617 2618 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]) 2619 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]); 2620 2621 /* 2622 * (Re)Association Request - P2P IE 2623 * P2P Capability attribute (shall be present) 2624 * Extended Listen Timing (may be present) 2625 * P2P Device Info attribute (shall be present) 2626 */ 2627 tmp = wpabuf_alloc(200 + extra); 2628 if (tmp == NULL) 2629 return -1; 2630 2631#ifdef CONFIG_WIFI_DISPLAY 2632 if (p2p->wfd_ie_assoc_req) 2633 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req); 2634#endif /* CONFIG_WIFI_DISPLAY */ 2635 2636 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]) 2637 wpabuf_put_buf(tmp, 2638 p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]); 2639 2640 peer = bssid ? p2p_get_device(p2p, bssid) : NULL; 2641 2642 lpos = p2p_buf_add_ie_hdr(tmp); 2643 p2p_buf_add_capability(tmp, p2p->dev_capab, 0); 2644 if (p2p->ext_listen_interval) 2645 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period, 2646 p2p->ext_listen_interval); 2647 p2p_buf_add_device_info(tmp, p2p, peer); 2648 p2p_buf_update_ie_hdr(tmp, lpos); 2649 2650 tmplen = wpabuf_len(tmp); 2651 if (tmplen > len) 2652 res = -1; 2653 else { 2654 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2655 res = tmplen; 2656 } 2657 wpabuf_free(tmp); 2658 2659 return res; 2660} 2661 2662 2663int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) 2664{ 2665 struct wpabuf *p2p_ie; 2666 int ret; 2667 2668 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); 2669 if (p2p_ie == NULL) 2670 return 0; 2671 2672 ret = p2p_attr_text(p2p_ie, buf, end); 2673 wpabuf_free(p2p_ie); 2674 return ret; 2675} 2676 2677 2678struct p2ps_advertisement * 2679p2p_service_p2ps_id(struct p2p_data *p2p, u32 adv_id) 2680{ 2681 struct p2ps_advertisement *adv_data; 2682 2683 if (!p2p) 2684 return NULL; 2685 2686 adv_data = p2p->p2ps_adv_list; 2687 while (adv_data) { 2688 if (adv_data->id == adv_id) 2689 return adv_data; 2690 adv_data = adv_data->next; 2691 } 2692 2693 return NULL; 2694} 2695 2696 2697int p2p_service_del_asp(struct p2p_data *p2p, u32 adv_id) 2698{ 2699 struct p2ps_advertisement *adv_data; 2700 struct p2ps_advertisement **prior; 2701 2702 if (!p2p) 2703 return -1; 2704 2705 adv_data = p2p->p2ps_adv_list; 2706 prior = &p2p->p2ps_adv_list; 2707 while (adv_data) { 2708 if (adv_data->id == adv_id) { 2709 p2p_dbg(p2p, "Delete ASP adv_id=0x%x", adv_id); 2710 *prior = adv_data->next; 2711 os_free(adv_data); 2712 return 0; 2713 } 2714 prior = &adv_data->next; 2715 adv_data = adv_data->next; 2716 } 2717 2718 return -1; 2719} 2720 2721 2722int p2p_service_add_asp(struct p2p_data *p2p, int auto_accept, u32 adv_id, 2723 const char *adv_str, u8 svc_state, u16 config_methods, 2724 const char *svc_info, const u8 *cpt_priority) 2725{ 2726 struct p2ps_advertisement *adv_data, *tmp, **prev; 2727 u8 buf[P2PS_HASH_LEN]; 2728 size_t adv_data_len, adv_len, info_len = 0; 2729 int i; 2730 2731 if (!p2p || !adv_str || !adv_str[0] || !cpt_priority) 2732 return -1; 2733 2734 if (!(config_methods & p2p->cfg->config_methods)) { 2735 p2p_dbg(p2p, "Config methods not supported svc: 0x%x dev: 0x%x", 2736 config_methods, p2p->cfg->config_methods); 2737 return -1; 2738 } 2739 2740 if (!p2ps_gen_hash(p2p, adv_str, buf)) 2741 return -1; 2742 2743 if (svc_info) 2744 info_len = os_strlen(svc_info); 2745 adv_len = os_strlen(adv_str); 2746 adv_data_len = sizeof(struct p2ps_advertisement) + adv_len + 1 + 2747 info_len + 1; 2748 2749 adv_data = os_zalloc(adv_data_len); 2750 if (!adv_data) 2751 return -1; 2752 2753 os_memcpy(adv_data->hash, buf, P2PS_HASH_LEN); 2754 adv_data->id = adv_id; 2755 adv_data->state = svc_state; 2756 adv_data->config_methods = config_methods & p2p->cfg->config_methods; 2757 adv_data->auto_accept = (u8) auto_accept; 2758 os_memcpy(adv_data->svc_name, adv_str, adv_len); 2759 2760 for (i = 0; cpt_priority[i] && i < P2PS_FEATURE_CAPAB_CPT_MAX; i++) { 2761 adv_data->cpt_priority[i] = cpt_priority[i]; 2762 adv_data->cpt_mask |= cpt_priority[i]; 2763 } 2764 2765 if (svc_info && info_len) { 2766 adv_data->svc_info = &adv_data->svc_name[adv_len + 1]; 2767 os_memcpy(adv_data->svc_info, svc_info, info_len); 2768 } 2769 2770 /* 2771 * Group Advertisements by service string. They do not need to be 2772 * sorted, but groups allow easier Probe Response instance grouping 2773 */ 2774 tmp = p2p->p2ps_adv_list; 2775 prev = &p2p->p2ps_adv_list; 2776 while (tmp) { 2777 if (tmp->id == adv_data->id) { 2778 if (os_strcmp(tmp->svc_name, adv_data->svc_name) != 0) { 2779 os_free(adv_data); 2780 return -1; 2781 } 2782 adv_data->next = tmp->next; 2783 *prev = adv_data; 2784 os_free(tmp); 2785 goto inserted; 2786 } else { 2787 if (os_strcmp(tmp->svc_name, adv_data->svc_name) == 0) { 2788 adv_data->next = tmp->next; 2789 tmp->next = adv_data; 2790 goto inserted; 2791 } 2792 } 2793 prev = &tmp->next; 2794 tmp = tmp->next; 2795 } 2796 2797 /* No svc_name match found */ 2798 adv_data->next = p2p->p2ps_adv_list; 2799 p2p->p2ps_adv_list = adv_data; 2800 2801inserted: 2802 p2p_dbg(p2p, 2803 "Added ASP advertisement adv_id=0x%x config_methods=0x%x svc_state=0x%x adv_str='%s' cpt_mask=0x%x", 2804 adv_id, adv_data->config_methods, svc_state, adv_str, 2805 adv_data->cpt_mask); 2806 2807 return 0; 2808} 2809 2810 2811void p2p_service_flush_asp(struct p2p_data *p2p) 2812{ 2813 struct p2ps_advertisement *adv, *prev; 2814 2815 if (!p2p) 2816 return; 2817 2818 adv = p2p->p2ps_adv_list; 2819 while (adv) { 2820 prev = adv; 2821 adv = adv->next; 2822 os_free(prev); 2823 } 2824 2825 p2p->p2ps_adv_list = NULL; 2826 p2ps_prov_free(p2p); 2827 p2p_dbg(p2p, "All ASP advertisements flushed"); 2828} 2829 2830 2831int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr) 2832{ 2833 struct p2p_message msg; 2834 2835 os_memset(&msg, 0, sizeof(msg)); 2836 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 2837 return -1; 2838 2839 if (msg.p2p_device_addr) { 2840 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); 2841 return 0; 2842 } else if (msg.device_id) { 2843 os_memcpy(dev_addr, msg.device_id, ETH_ALEN); 2844 return 0; 2845 } 2846 return -1; 2847} 2848 2849 2850int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr) 2851{ 2852 struct wpabuf *p2p_ie; 2853 int ret; 2854 2855 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 2856 P2P_IE_VENDOR_TYPE); 2857 if (p2p_ie == NULL) 2858 return -1; 2859 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr); 2860 wpabuf_free(p2p_ie); 2861 return ret; 2862} 2863 2864 2865static void p2p_clear_go_neg(struct p2p_data *p2p) 2866{ 2867 p2p->go_neg_peer = NULL; 2868 p2p_clear_timeout(p2p); 2869 p2p_set_state(p2p, P2P_IDLE); 2870} 2871 2872 2873void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr) 2874{ 2875 if (p2p->go_neg_peer == NULL) { 2876 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification"); 2877 return; /* No pending Group Formation */ 2878 } 2879 2880 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) != 2881 0) { 2882 p2p_dbg(p2p, "Ignore WPS registration success notification for " 2883 MACSTR " (GO Negotiation peer " MACSTR ")", 2884 MAC2STR(mac_addr), 2885 MAC2STR(p2p->go_neg_peer->intended_addr)); 2886 return; /* Ignore unexpected peer address */ 2887 } 2888 2889 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR, 2890 MAC2STR(mac_addr)); 2891 2892 p2p_clear_go_neg(p2p); 2893} 2894 2895 2896void p2p_group_formation_failed(struct p2p_data *p2p) 2897{ 2898 if (p2p->go_neg_peer == NULL) { 2899 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification"); 2900 return; /* No pending Group Formation */ 2901 } 2902 2903 p2p_dbg(p2p, "Group Formation failed with " MACSTR, 2904 MAC2STR(p2p->go_neg_peer->intended_addr)); 2905 2906 p2p_clear_go_neg(p2p); 2907} 2908 2909 2910struct p2p_data * p2p_init(const struct p2p_config *cfg) 2911{ 2912 struct p2p_data *p2p; 2913 2914 if (cfg->max_peers < 1 || 2915 cfg->passphrase_len < 8 || cfg->passphrase_len > 63) 2916 return NULL; 2917 2918 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg)); 2919 if (p2p == NULL) 2920 return NULL; 2921 p2p->cfg = (struct p2p_config *) (p2p + 1); 2922 os_memcpy(p2p->cfg, cfg, sizeof(*cfg)); 2923 if (cfg->dev_name) 2924 p2p->cfg->dev_name = os_strdup(cfg->dev_name); 2925 if (cfg->manufacturer) 2926 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer); 2927 if (cfg->model_name) 2928 p2p->cfg->model_name = os_strdup(cfg->model_name); 2929 if (cfg->model_number) 2930 p2p->cfg->model_number = os_strdup(cfg->model_number); 2931 if (cfg->serial_number) 2932 p2p->cfg->serial_number = os_strdup(cfg->serial_number); 2933 if (cfg->pref_chan) { 2934 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan * 2935 sizeof(struct p2p_channel)); 2936 if (p2p->cfg->pref_chan) { 2937 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan, 2938 cfg->num_pref_chan * 2939 sizeof(struct p2p_channel)); 2940 } else 2941 p2p->cfg->num_pref_chan = 0; 2942 } 2943 2944 p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash); 2945 2946 p2p->min_disc_int = 1; 2947 p2p->max_disc_int = 3; 2948 p2p->max_disc_tu = -1; 2949 2950 if (os_get_random(&p2p->next_tie_breaker, 1) < 0) 2951 p2p->next_tie_breaker = 0; 2952 p2p->next_tie_breaker &= 0x01; 2953 if (cfg->sd_request) 2954 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 2955 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE; 2956 if (cfg->concurrent_operations) 2957 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER; 2958 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 2959 2960 dl_list_init(&p2p->devices); 2961 2962 p2p->go_timeout = 100; 2963 p2p->client_timeout = 20; 2964 p2p->num_p2p_sd_queries = 0; 2965 2966 p2p_dbg(p2p, "initialized"); 2967 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 2968 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 2969 2970 return p2p; 2971} 2972 2973 2974void p2p_deinit(struct p2p_data *p2p) 2975{ 2976#ifdef CONFIG_WIFI_DISPLAY 2977 wpabuf_free(p2p->wfd_ie_beacon); 2978 wpabuf_free(p2p->wfd_ie_probe_req); 2979 wpabuf_free(p2p->wfd_ie_probe_resp); 2980 wpabuf_free(p2p->wfd_ie_assoc_req); 2981 wpabuf_free(p2p->wfd_ie_invitation); 2982 wpabuf_free(p2p->wfd_ie_prov_disc_req); 2983 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 2984 wpabuf_free(p2p->wfd_ie_go_neg); 2985 wpabuf_free(p2p->wfd_dev_info); 2986 wpabuf_free(p2p->wfd_assoc_bssid); 2987 wpabuf_free(p2p->wfd_coupled_sink_info); 2988 wpabuf_free(p2p->wfd_r2_dev_info); 2989#endif /* CONFIG_WIFI_DISPLAY */ 2990 2991 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2992 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2993 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL); 2994 p2p_flush(p2p); 2995 p2p_free_req_dev_types(p2p); 2996 os_free(p2p->cfg->dev_name); 2997 os_free(p2p->cfg->manufacturer); 2998 os_free(p2p->cfg->model_name); 2999 os_free(p2p->cfg->model_number); 3000 os_free(p2p->cfg->serial_number); 3001 os_free(p2p->cfg->pref_chan); 3002 os_free(p2p->groups); 3003 p2ps_prov_free(p2p); 3004 wpabuf_free(p2p->sd_resp); 3005 p2p_remove_wps_vendor_extensions(p2p); 3006 os_free(p2p->no_go_freq.range); 3007 p2p_service_flush_asp(p2p); 3008 3009 os_free(p2p); 3010} 3011 3012 3013void p2p_flush(struct p2p_data *p2p) 3014{ 3015 struct p2p_device *dev, *prev; 3016 3017 p2p_ext_listen(p2p, 0, 0); 3018 p2p_stop_find(p2p); 3019 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device, 3020 list) { 3021 dl_list_del(&dev->list); 3022 p2p_device_free(p2p, dev); 3023 } 3024 p2p_free_sd_queries(p2p); 3025 p2p->ssid_set = 0; 3026 p2ps_prov_free(p2p); 3027 p2p_reset_pending_pd(p2p); 3028 p2p->override_pref_op_class = 0; 3029 p2p->override_pref_channel = 0; 3030} 3031 3032 3033int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr) 3034{ 3035 struct p2p_device *dev; 3036 3037 dev = p2p_get_device(p2p, addr); 3038 if (dev == NULL) 3039 return -1; 3040 3041 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr)); 3042 3043 if (p2p->go_neg_peer == dev) { 3044 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL); 3045 p2p->go_neg_peer = NULL; 3046 } 3047 3048 dev->wps_method = WPS_NOT_READY; 3049 dev->oob_pw_id = 0; 3050 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 3051 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 3052 3053 return 0; 3054} 3055 3056 3057int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name) 3058{ 3059 os_free(p2p->cfg->dev_name); 3060 if (dev_name) { 3061 p2p->cfg->dev_name = os_strdup(dev_name); 3062 if (p2p->cfg->dev_name == NULL) 3063 return -1; 3064 } else 3065 p2p->cfg->dev_name = NULL; 3066 return 0; 3067} 3068 3069 3070int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer) 3071{ 3072 os_free(p2p->cfg->manufacturer); 3073 p2p->cfg->manufacturer = NULL; 3074 if (manufacturer) { 3075 p2p->cfg->manufacturer = os_strdup(manufacturer); 3076 if (p2p->cfg->manufacturer == NULL) 3077 return -1; 3078 } 3079 3080 return 0; 3081} 3082 3083 3084int p2p_set_model_name(struct p2p_data *p2p, const char *model_name) 3085{ 3086 os_free(p2p->cfg->model_name); 3087 p2p->cfg->model_name = NULL; 3088 if (model_name) { 3089 p2p->cfg->model_name = os_strdup(model_name); 3090 if (p2p->cfg->model_name == NULL) 3091 return -1; 3092 } 3093 3094 return 0; 3095} 3096 3097 3098int p2p_set_model_number(struct p2p_data *p2p, const char *model_number) 3099{ 3100 os_free(p2p->cfg->model_number); 3101 p2p->cfg->model_number = NULL; 3102 if (model_number) { 3103 p2p->cfg->model_number = os_strdup(model_number); 3104 if (p2p->cfg->model_number == NULL) 3105 return -1; 3106 } 3107 3108 return 0; 3109} 3110 3111 3112int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number) 3113{ 3114 os_free(p2p->cfg->serial_number); 3115 p2p->cfg->serial_number = NULL; 3116 if (serial_number) { 3117 p2p->cfg->serial_number = os_strdup(serial_number); 3118 if (p2p->cfg->serial_number == NULL) 3119 return -1; 3120 } 3121 3122 return 0; 3123} 3124 3125 3126void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods) 3127{ 3128 p2p->cfg->config_methods = config_methods; 3129} 3130 3131 3132void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid) 3133{ 3134 os_memcpy(p2p->cfg->uuid, uuid, 16); 3135} 3136 3137 3138int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type) 3139{ 3140 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8); 3141 return 0; 3142} 3143 3144 3145int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8], 3146 size_t num_dev_types) 3147{ 3148 if (num_dev_types > P2P_SEC_DEVICE_TYPES) 3149 num_dev_types = P2P_SEC_DEVICE_TYPES; 3150 p2p->cfg->num_sec_dev_types = num_dev_types; 3151 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8); 3152 return 0; 3153} 3154 3155 3156void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p) 3157{ 3158 int i; 3159 3160 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 3161 wpabuf_free(p2p->wps_vendor_ext[i]); 3162 p2p->wps_vendor_ext[i] = NULL; 3163 } 3164} 3165 3166 3167int p2p_add_wps_vendor_extension(struct p2p_data *p2p, 3168 const struct wpabuf *vendor_ext) 3169{ 3170 int i; 3171 3172 if (vendor_ext == NULL) 3173 return -1; 3174 3175 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 3176 if (p2p->wps_vendor_ext[i] == NULL) 3177 break; 3178 } 3179 if (i >= P2P_MAX_WPS_VENDOR_EXT) 3180 return -1; 3181 3182 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext); 3183 if (p2p->wps_vendor_ext[i] == NULL) 3184 return -1; 3185 3186 return 0; 3187} 3188 3189 3190int p2p_set_country(struct p2p_data *p2p, const char *country) 3191{ 3192 os_memcpy(p2p->cfg->country, country, 3); 3193 return 0; 3194} 3195 3196 3197static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev) 3198{ 3199 int res; 3200 3201 if (dev->sd_pending_bcast_queries == 0) { 3202 /* Initialize with total number of registered broadcast 3203 * SD queries. */ 3204 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries; 3205 } 3206 3207 res = p2p_start_sd(p2p, dev); 3208 if (res == -2) 3209 return -2; 3210 if (res == 0) 3211 return 1; 3212 3213 if (dev->req_config_methods && 3214 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) { 3215 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 3216 MACSTR " (config methods 0x%x)", 3217 MAC2STR(dev->info.p2p_device_addr), 3218 dev->req_config_methods); 3219 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0) 3220 return 1; 3221 } 3222 3223 return 0; 3224} 3225 3226 3227void p2p_continue_find(struct p2p_data *p2p) 3228{ 3229 struct p2p_device *dev; 3230 int found, res; 3231 3232 p2p_set_state(p2p, P2P_SEARCH); 3233 3234 /* Continue from the device following the last iteration */ 3235 found = 0; 3236 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3237 if (dev == p2p->last_p2p_find_oper) { 3238 found = 1; 3239 continue; 3240 } 3241 if (!found) 3242 continue; 3243 res = p2p_pre_find_operation(p2p, dev); 3244 if (res > 0) { 3245 p2p->last_p2p_find_oper = dev; 3246 return; 3247 } 3248 if (res == -2) 3249 goto skip_sd; 3250 } 3251 3252 /* 3253 * Wrap around to the beginning of the list and continue until the last 3254 * iteration device. 3255 */ 3256 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 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 if (dev == p2p->last_p2p_find_oper) 3265 break; 3266 } 3267 3268skip_sd: 3269 os_memset(p2p->sd_query_no_ack, 0, ETH_ALEN); 3270 p2p_listen_in_find(p2p, 1); 3271} 3272 3273 3274static void p2p_sd_cb(struct p2p_data *p2p, int success) 3275{ 3276 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d", 3277 success); 3278 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3279 3280 if (!success) { 3281 if (p2p->sd_peer) { 3282 if (is_zero_ether_addr(p2p->sd_query_no_ack)) { 3283 os_memcpy(p2p->sd_query_no_ack, 3284 p2p->sd_peer->info.p2p_device_addr, 3285 ETH_ALEN); 3286 p2p_dbg(p2p, 3287 "First SD Query no-ACK in this search iteration: " 3288 MACSTR, MAC2STR(p2p->sd_query_no_ack)); 3289 } 3290 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3291 } 3292 p2p->sd_peer = NULL; 3293 if (p2p->state != P2P_IDLE) 3294 p2p_continue_find(p2p); 3295 return; 3296 } 3297 3298 if (p2p->sd_peer == NULL) { 3299 p2p_dbg(p2p, "No SD peer entry known"); 3300 if (p2p->state != P2P_IDLE) 3301 p2p_continue_find(p2p); 3302 return; 3303 } 3304 3305 if (p2p->sd_query && p2p->sd_query->for_all_peers) { 3306 /* Update the pending broadcast SD query count for this device 3307 */ 3308 p2p->sd_peer->sd_pending_bcast_queries--; 3309 3310 /* 3311 * If there are no pending broadcast queries for this device, 3312 * mark it as done (-1). 3313 */ 3314 if (p2p->sd_peer->sd_pending_bcast_queries == 0) 3315 p2p->sd_peer->sd_pending_bcast_queries = -1; 3316 } 3317 3318 /* Wait for response from the peer */ 3319 p2p_set_state(p2p, P2P_SD_DURING_FIND); 3320 p2p_set_timeout(p2p, 0, 200000); 3321} 3322 3323 3324/** 3325 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state 3326 * @p2p: P2P module context from p2p_init() 3327 */ 3328static void p2p_retry_pd(struct p2p_data *p2p) 3329{ 3330 struct p2p_device *dev; 3331 3332 /* 3333 * Retry the prov disc req attempt only for the peer that the user had 3334 * requested. 3335 */ 3336 3337 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3338 if (os_memcmp(p2p->pending_pd_devaddr, 3339 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3340 continue; 3341 if (!dev->req_config_methods) 3342 continue; 3343 3344 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 3345 MACSTR " (config methods 0x%x)", 3346 MAC2STR(dev->info.p2p_device_addr), 3347 dev->req_config_methods); 3348 p2p_send_prov_disc_req(p2p, dev, 3349 dev->flags & P2P_DEV_PD_FOR_JOIN, 3350 p2p->pd_force_freq); 3351 return; 3352 } 3353} 3354 3355 3356static void p2p_prov_disc_cb(struct p2p_data *p2p, int success) 3357{ 3358 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d", 3359 success); 3360 3361 /* 3362 * Postpone resetting the pending action state till after we actually 3363 * time out. This allows us to take some action like notifying any 3364 * interested parties about no response to the request. 3365 * 3366 * When the timer (below) goes off we check in IDLE, SEARCH, or 3367 * LISTEN_ONLY state, which are the only allowed states to issue a PD 3368 * requests in, if this was still pending and then raise notification. 3369 */ 3370 3371 if (!success) { 3372 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3373 3374 if (p2p->user_initiated_pd && 3375 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY)) 3376 { 3377 /* Retry request from timeout to avoid busy loops */ 3378 p2p->pending_action_state = P2P_PENDING_PD; 3379 p2p_set_timeout(p2p, 0, 50000); 3380 } else if (p2p->state != P2P_IDLE) 3381 p2p_continue_find(p2p); 3382 else if (p2p->user_initiated_pd) { 3383 p2p->pending_action_state = P2P_PENDING_PD; 3384 p2p_set_timeout(p2p, 0, 300000); 3385 } 3386 return; 3387 } 3388 3389 /* 3390 * If after PD Request the peer doesn't expect to receive PD Response 3391 * the PD Request ACK indicates a completion of the current PD. This 3392 * happens only on the advertiser side sending the follow-on PD Request 3393 * with the status different than 12 (Success: accepted by user). 3394 */ 3395 if (p2p->p2ps_prov && !p2p->p2ps_prov->pd_seeker && 3396 p2p->p2ps_prov->status != P2P_SC_SUCCESS_DEFERRED) { 3397 p2p_dbg(p2p, "P2PS PD completion on Follow-on PD Request ACK"); 3398 3399 if (p2p->send_action_in_progress) { 3400 p2p->send_action_in_progress = 0; 3401 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3402 } 3403 3404 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3405 3406 if (p2p->cfg->p2ps_prov_complete) { 3407 p2p->cfg->p2ps_prov_complete( 3408 p2p->cfg->cb_ctx, 3409 p2p->p2ps_prov->status, 3410 p2p->p2ps_prov->adv_mac, 3411 p2p->p2ps_prov->adv_mac, 3412 p2p->p2ps_prov->session_mac, 3413 NULL, p2p->p2ps_prov->adv_id, 3414 p2p->p2ps_prov->session_id, 3415 0, 0, NULL, 0, 0, 0, 3416 NULL, NULL, 0, 0, NULL, 0); 3417 } 3418 3419 if (p2p->user_initiated_pd) 3420 p2p_reset_pending_pd(p2p); 3421 3422 p2ps_prov_free(p2p); 3423 return; 3424 } 3425 3426 /* 3427 * This postponing, of resetting pending_action_state, needs to be 3428 * done only for user initiated PD requests and not internal ones. 3429 */ 3430 if (p2p->user_initiated_pd) 3431 p2p->pending_action_state = P2P_PENDING_PD; 3432 else 3433 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3434 3435 /* Wait for response from the peer */ 3436 if (p2p->state == P2P_SEARCH) 3437 p2p_set_state(p2p, P2P_PD_DURING_FIND); 3438 p2p_set_timeout(p2p, 0, 200000); 3439} 3440 3441 3442static void p2p_prov_disc_resp_cb(struct p2p_data *p2p, int success) 3443{ 3444 p2p_dbg(p2p, "Provision Discovery Response TX callback: success=%d", 3445 success); 3446 3447 if (p2p->send_action_in_progress) { 3448 p2p->send_action_in_progress = 0; 3449 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3450 } 3451 3452 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3453 3454 if (!success) 3455 return; 3456 3457 if (!p2p->cfg->prov_disc_resp_cb || 3458 p2p->cfg->prov_disc_resp_cb(p2p->cfg->cb_ctx) < 1) 3459 return; 3460 3461 p2p_dbg(p2p, 3462 "Post-Provision Discovery operations started - do not try to continue other P2P operations"); 3463} 3464 3465 3466int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq, 3467 struct os_reltime *rx_time, int level, const u8 *ies, 3468 size_t ies_len) 3469{ 3470 if (os_reltime_before(rx_time, &p2p->find_start)) { 3471 /* 3472 * The driver may have cached (e.g., in cfg80211 BSS table) the 3473 * scan results for relatively long time. To avoid reporting 3474 * stale information, update P2P peers only based on results 3475 * that have based on frames received after the last p2p_find 3476 * operation was started. 3477 */ 3478 p2p_dbg(p2p, "Ignore old scan result for " MACSTR 3479 " (rx_time=%u.%06u find_start=%u.%06u)", 3480 MAC2STR(bssid), (unsigned int) rx_time->sec, 3481 (unsigned int) rx_time->usec, 3482 (unsigned int) p2p->find_start.sec, 3483 (unsigned int) p2p->find_start.usec); 3484 return 0; 3485 } 3486 3487 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1); 3488 3489 return 0; 3490} 3491 3492 3493void p2p_scan_res_handled(struct p2p_data *p2p) 3494{ 3495 if (!p2p->p2p_scan_running) { 3496 p2p_dbg(p2p, "p2p_scan was not running, but scan results received"); 3497 } 3498 p2p->p2p_scan_running = 0; 3499 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 3500 3501 if (p2p_run_after_scan(p2p)) 3502 return; 3503 if (p2p->state == P2P_SEARCH) 3504 p2p_continue_find(p2p); 3505} 3506 3507 3508void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id, 3509 unsigned int bands) 3510{ 3511 u8 dev_capab; 3512 u8 *len; 3513 3514#ifdef CONFIG_WIFI_DISPLAY 3515 if (p2p->wfd_ie_probe_req) 3516 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req); 3517#endif /* CONFIG_WIFI_DISPLAY */ 3518 3519 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]) 3520 wpabuf_put_buf(ies, 3521 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]); 3522 3523 len = p2p_buf_add_ie_hdr(ies); 3524 3525 dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3526 3527 /* P2PS requires Probe Request frames to include SD bit */ 3528 if (p2p->p2ps_seek && p2p->p2ps_seek_count) 3529 dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 3530 3531 p2p_buf_add_capability(ies, dev_capab, 0); 3532 3533 if (dev_id) 3534 p2p_buf_add_device_id(ies, dev_id); 3535 if (p2p->cfg->reg_class && p2p->cfg->channel) 3536 p2p_buf_add_listen_channel(ies, p2p->cfg->country, 3537 p2p->cfg->reg_class, 3538 p2p->cfg->channel); 3539 if (p2p->ext_listen_interval) 3540 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period, 3541 p2p->ext_listen_interval); 3542 3543 if (bands & BAND_60_GHZ) 3544 p2p_buf_add_device_info(ies, p2p, NULL); 3545 3546 if (p2p->p2ps_seek && p2p->p2ps_seek_count) 3547 p2p_buf_add_service_hash(ies, p2p); 3548 3549 /* TODO: p2p_buf_add_operating_channel() if GO */ 3550 p2p_buf_update_ie_hdr(ies, len); 3551} 3552 3553 3554size_t p2p_scan_ie_buf_len(struct p2p_data *p2p) 3555{ 3556 size_t len = 100; 3557 3558#ifdef CONFIG_WIFI_DISPLAY 3559 if (p2p && p2p->wfd_ie_probe_req) 3560 len += wpabuf_len(p2p->wfd_ie_probe_req); 3561#endif /* CONFIG_WIFI_DISPLAY */ 3562 3563 if (p2p && p2p->vendor_elem && 3564 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]) 3565 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]); 3566 3567 return len; 3568} 3569 3570 3571int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end) 3572{ 3573 return p2p_attr_text(p2p_ie, buf, end); 3574} 3575 3576 3577static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success) 3578{ 3579 struct p2p_device *dev = p2p->go_neg_peer; 3580 int timeout; 3581 3582 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success); 3583 3584 if (dev == NULL) { 3585 p2p_dbg(p2p, "No pending GO Negotiation"); 3586 return; 3587 } 3588 3589 if (success) { 3590 if (dev->flags & P2P_DEV_USER_REJECTED) { 3591 p2p_set_state(p2p, P2P_IDLE); 3592 return; 3593 } 3594 } else if (dev->go_neg_req_sent) { 3595 /* Cancel the increment from p2p_connect_send() on failure */ 3596 dev->go_neg_req_sent--; 3597 } 3598 3599 if (!success && 3600 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) && 3601 !is_zero_ether_addr(dev->member_in_go_dev)) { 3602 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO", 3603 MAC2STR(dev->info.p2p_device_addr)); 3604 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3605 p2p_send_dev_disc_req(p2p, dev); 3606 return; 3607 } 3608 3609 /* 3610 * Use P2P find, if needed, to find the other device from its listen 3611 * channel. 3612 */ 3613 p2p_set_state(p2p, P2P_CONNECT); 3614 timeout = success ? 500000 : 100000; 3615 if (!success && p2p->go_neg_peer && 3616 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) { 3617 unsigned int r; 3618 /* 3619 * Peer is expected to wait our response and we will skip the 3620 * listen phase. Add some randomness to the wait time here to 3621 * make it less likely to hit cases where we could end up in 3622 * sync with peer not listening. 3623 */ 3624 if (os_get_random((u8 *) &r, sizeof(r)) < 0) 3625 r = 0; 3626 timeout += r % 100000; 3627 } 3628 p2p_set_timeout(p2p, 0, timeout); 3629} 3630 3631 3632static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success) 3633{ 3634 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d", 3635 success); 3636 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) { 3637 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore"); 3638 return; 3639 } 3640 p2p_set_state(p2p, P2P_CONNECT); 3641 p2p_set_timeout(p2p, 0, 500000); 3642} 3643 3644 3645static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success, 3646 const u8 *addr) 3647{ 3648 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success); 3649 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) { 3650 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status); 3651 return; 3652 } 3653 3654 if (success) { 3655 struct p2p_device *dev; 3656 dev = p2p_get_device(p2p, addr); 3657 if (dev && 3658 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) 3659 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE; 3660 } 3661 3662 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND) 3663 p2p_continue_find(p2p); 3664} 3665 3666 3667static void p2p_go_neg_conf_cb(struct p2p_data *p2p, 3668 enum p2p_send_action_result result) 3669{ 3670 struct p2p_device *dev; 3671 3672 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result); 3673 if (result == P2P_SEND_ACTION_FAILED) { 3674 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3675 p2p_go_neg_failed(p2p, -1); 3676 return; 3677 } 3678 3679 dev = p2p->go_neg_peer; 3680 3681 if (result == P2P_SEND_ACTION_NO_ACK) { 3682 /* 3683 * Retry GO Negotiation Confirmation 3684 * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive 3685 * ACK for confirmation. 3686 */ 3687 if (dev && dev->go_neg_conf && 3688 dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) { 3689 p2p_dbg(p2p, "GO Negotiation Confirm retry %d", 3690 dev->go_neg_conf_sent); 3691 p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM; 3692 if (p2p_send_action(p2p, dev->go_neg_conf_freq, 3693 dev->info.p2p_device_addr, 3694 p2p->cfg->dev_addr, 3695 dev->info.p2p_device_addr, 3696 wpabuf_head(dev->go_neg_conf), 3697 wpabuf_len(dev->go_neg_conf), 0) >= 3698 0) { 3699 dev->go_neg_conf_sent++; 3700 return; 3701 } 3702 p2p_dbg(p2p, "Failed to re-send Action frame"); 3703 3704 /* 3705 * Continue with the assumption that the first attempt 3706 * went through and just the ACK frame was lost. 3707 */ 3708 } 3709 3710 /* 3711 * It looks like the TX status for GO Negotiation Confirm is 3712 * often showing failure even when the peer has actually 3713 * received the frame. Since the peer may change channels 3714 * immediately after having received the frame, we may not see 3715 * an Ack for retries, so just dropping a single frame may 3716 * trigger this. To allow the group formation to succeed if the 3717 * peer did indeed receive the frame, continue regardless of 3718 * the TX status. 3719 */ 3720 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported"); 3721 } 3722 3723 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3724 3725 if (dev == NULL) 3726 return; 3727 3728 p2p_go_complete(p2p, dev); 3729} 3730 3731 3732void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 3733 const u8 *src, const u8 *bssid, 3734 enum p2p_send_action_result result) 3735{ 3736 enum p2p_pending_action_state state; 3737 int success; 3738 3739 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR 3740 " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)", 3741 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), 3742 MAC2STR(bssid), result, p2p_state_txt(p2p->state)); 3743 success = result == P2P_SEND_ACTION_SUCCESS; 3744 state = p2p->pending_action_state; 3745 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3746 switch (state) { 3747 case P2P_NO_PENDING_ACTION: 3748 if (p2p->send_action_in_progress) { 3749 p2p->send_action_in_progress = 0; 3750 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3751 } 3752 break; 3753 case P2P_PENDING_GO_NEG_REQUEST: 3754 p2p_go_neg_req_cb(p2p, success); 3755 break; 3756 case P2P_PENDING_GO_NEG_RESPONSE: 3757 p2p_go_neg_resp_cb(p2p, success); 3758 break; 3759 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE: 3760 p2p_go_neg_resp_failure_cb(p2p, success, dst); 3761 break; 3762 case P2P_PENDING_GO_NEG_CONFIRM: 3763 p2p_go_neg_conf_cb(p2p, result); 3764 break; 3765 case P2P_PENDING_SD: 3766 p2p_sd_cb(p2p, success); 3767 break; 3768 case P2P_PENDING_PD: 3769 p2p_prov_disc_cb(p2p, success); 3770 break; 3771 case P2P_PENDING_PD_RESPONSE: 3772 p2p_prov_disc_resp_cb(p2p, success); 3773 break; 3774 case P2P_PENDING_INVITATION_REQUEST: 3775 p2p_invitation_req_cb(p2p, success); 3776 break; 3777 case P2P_PENDING_INVITATION_RESPONSE: 3778 p2p_invitation_resp_cb(p2p, success); 3779 break; 3780 case P2P_PENDING_DEV_DISC_REQUEST: 3781 p2p_dev_disc_req_cb(p2p, success); 3782 break; 3783 case P2P_PENDING_DEV_DISC_RESPONSE: 3784 p2p_dev_disc_resp_cb(p2p, success); 3785 break; 3786 case P2P_PENDING_GO_DISC_REQ: 3787 p2p_go_disc_req_cb(p2p, success); 3788 break; 3789 } 3790} 3791 3792 3793void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq, 3794 unsigned int duration) 3795{ 3796 if (freq == p2p->pending_client_disc_freq) { 3797 p2p_dbg(p2p, "Client discoverability remain-awake completed"); 3798 p2p->pending_client_disc_freq = 0; 3799 return; 3800 } 3801 3802 if (freq != p2p->pending_listen_freq) { 3803 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)", 3804 freq, duration, p2p->pending_listen_freq); 3805 return; 3806 } 3807 3808 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback", 3809 p2p->pending_listen_sec, p2p->pending_listen_usec, 3810 p2p->pending_listen_freq); 3811 p2p->in_listen = 1; 3812 p2p->drv_in_listen = freq; 3813 if (p2p->pending_listen_sec || p2p->pending_listen_usec) { 3814 /* 3815 * Add 20 msec extra wait to avoid race condition with driver 3816 * remain-on-channel end event, i.e., give driver more time to 3817 * complete the operation before our timeout expires. 3818 */ 3819 p2p_set_timeout(p2p, p2p->pending_listen_sec, 3820 p2p->pending_listen_usec + 20000); 3821 } 3822 3823 p2p->pending_listen_freq = 0; 3824} 3825 3826 3827int p2p_listen_end(struct p2p_data *p2p, unsigned int freq) 3828{ 3829 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq); 3830 p2p->drv_in_listen = 0; 3831 if (p2p->in_listen) 3832 return 0; /* Internal timeout will trigger the next step */ 3833 3834 if (p2p->state == P2P_WAIT_PEER_CONNECT && p2p->go_neg_peer && 3835 p2p->pending_listen_freq) { 3836 /* 3837 * Better wait a bit if the driver is unable to start 3838 * offchannel operation for some reason to continue with 3839 * P2P_WAIT_PEER_(IDLE/CONNECT) state transitions. 3840 */ 3841 p2p_dbg(p2p, 3842 "Listen operation did not seem to start - delay idle phase to avoid busy loop"); 3843 p2p_set_timeout(p2p, 0, 100000); 3844 return 1; 3845 } 3846 3847 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) { 3848 if (p2p->go_neg_peer->connect_reqs >= 120) { 3849 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3850 p2p_go_neg_failed(p2p, -1); 3851 return 0; 3852 } 3853 3854 p2p_set_state(p2p, P2P_CONNECT); 3855 p2p_connect_send(p2p, p2p->go_neg_peer); 3856 return 1; 3857 } else if (p2p->state == P2P_SEARCH) { 3858 if (p2p->p2p_scan_running) { 3859 /* 3860 * Search is already in progress. This can happen if 3861 * an Action frame RX is reported immediately after 3862 * the end of a remain-on-channel operation and the 3863 * response frame to that is sent using an offchannel 3864 * operation while in p2p_find. Avoid an attempt to 3865 * restart a scan here. 3866 */ 3867 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one"); 3868 return 1; 3869 } 3870 if (p2p->pending_listen_freq) { 3871 /* 3872 * Better wait a bit if the driver is unable to start 3873 * offchannel operation for some reason. p2p_search() 3874 * will be started from internal timeout. 3875 */ 3876 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop"); 3877 p2p_set_timeout(p2p, 0, 100000); 3878 return 1; 3879 } 3880 if (p2p->search_delay) { 3881 p2p_dbg(p2p, "Delay search operation by %u ms", 3882 p2p->search_delay); 3883 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3884 (p2p->search_delay % 1000) * 1000); 3885 return 1; 3886 } 3887 p2p_search(p2p); 3888 return 1; 3889 } 3890 3891 return 0; 3892} 3893 3894 3895static void p2p_timeout_connect(struct p2p_data *p2p) 3896{ 3897 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3898 if (p2p->go_neg_peer && 3899 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 3900 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed"); 3901 p2p_go_neg_failed(p2p, -1); 3902 return; 3903 } 3904 if (p2p->go_neg_peer && 3905 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) && 3906 p2p->go_neg_peer->connect_reqs < 120) { 3907 p2p_dbg(p2p, "Peer expected to wait our response - skip listen"); 3908 p2p_connect_send(p2p, p2p->go_neg_peer); 3909 return; 3910 } 3911 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) { 3912 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)"); 3913 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3914 p2p_set_timeout(p2p, 0, 30000); 3915 return; 3916 } 3917 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3918 p2p_listen_in_find(p2p, 0); 3919} 3920 3921 3922static void p2p_timeout_connect_listen(struct p2p_data *p2p) 3923{ 3924 if (p2p->go_neg_peer) { 3925 if (p2p->drv_in_listen) { 3926 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete"); 3927 return; 3928 } 3929 3930 if (p2p->go_neg_peer->connect_reqs >= 120) { 3931 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3932 p2p_go_neg_failed(p2p, -1); 3933 return; 3934 } 3935 3936 p2p_set_state(p2p, P2P_CONNECT); 3937 p2p_connect_send(p2p, p2p->go_neg_peer); 3938 } else 3939 p2p_set_state(p2p, P2P_IDLE); 3940} 3941 3942 3943static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p) 3944{ 3945 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 3946 3947 if (p2p->cfg->is_concurrent_session_active && 3948 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx)) 3949 p2p_set_timeout(p2p, 0, 500000); 3950 else 3951 p2p_set_timeout(p2p, 0, 200000); 3952} 3953 3954 3955static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p) 3956{ 3957 struct p2p_device *dev = p2p->go_neg_peer; 3958 3959 if (dev == NULL) { 3960 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait"); 3961 return; 3962 } 3963 3964 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation"); 3965 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT); 3966 p2p_listen_in_find(p2p, 0); 3967} 3968 3969 3970static void p2p_timeout_sd_during_find(struct p2p_data *p2p) 3971{ 3972 p2p_dbg(p2p, "Service Discovery Query timeout"); 3973 if (p2p->sd_peer) { 3974 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3975 p2p->sd_peer = NULL; 3976 } 3977 p2p_continue_find(p2p); 3978} 3979 3980 3981static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p) 3982{ 3983 p2p_dbg(p2p, "Provision Discovery Request timeout"); 3984 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3985 p2p_continue_find(p2p); 3986} 3987 3988 3989static void p2p_timeout_prov_disc_req(struct p2p_data *p2p) 3990{ 3991 u32 adv_id = 0; 3992 u8 *adv_mac = NULL; 3993 3994 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3995 3996 /* 3997 * For user initiated PD requests that we have not gotten any responses 3998 * for while in IDLE state, we retry them a couple of times before 3999 * giving up. 4000 */ 4001 if (!p2p->user_initiated_pd) 4002 return; 4003 4004 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout"); 4005 4006 if (p2p->pd_retries) { 4007 p2p->pd_retries--; 4008 p2p_retry_pd(p2p); 4009 } else { 4010 struct p2p_device *dev; 4011 int for_join = 0; 4012 4013 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 4014 if (os_memcmp(p2p->pending_pd_devaddr, 4015 dev->info.p2p_device_addr, ETH_ALEN) != 0) 4016 continue; 4017 if (dev->req_config_methods && 4018 (dev->flags & P2P_DEV_PD_FOR_JOIN)) 4019 for_join = 1; 4020 } 4021 4022 if (p2p->p2ps_prov) { 4023 adv_id = p2p->p2ps_prov->adv_id; 4024 adv_mac = p2p->p2ps_prov->adv_mac; 4025 } 4026 4027 if (p2p->cfg->prov_disc_fail) 4028 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, 4029 p2p->pending_pd_devaddr, 4030 for_join ? 4031 P2P_PROV_DISC_TIMEOUT_JOIN : 4032 P2P_PROV_DISC_TIMEOUT, 4033 adv_id, adv_mac, NULL); 4034 p2p_reset_pending_pd(p2p); 4035 } 4036} 4037 4038 4039static void p2p_timeout_invite(struct p2p_data *p2p) 4040{ 4041 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 4042 p2p_set_state(p2p, P2P_INVITE_LISTEN); 4043 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 4044 /* 4045 * Better remain on operating channel instead of listen channel 4046 * when running a group. 4047 */ 4048 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel"); 4049 p2p_set_timeout(p2p, 0, 100000); 4050 return; 4051 } 4052 p2p_listen_in_find(p2p, 0); 4053} 4054 4055 4056static void p2p_timeout_invite_listen(struct p2p_data *p2p) 4057{ 4058 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) { 4059 p2p_set_state(p2p, P2P_INVITE); 4060 p2p_invite_send(p2p, p2p->invite_peer, 4061 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id); 4062 } else { 4063 if (p2p->invite_peer) { 4064 p2p_dbg(p2p, "Invitation Request retry limit reached"); 4065 if (p2p->cfg->invitation_result) 4066 p2p->cfg->invitation_result( 4067 p2p->cfg->cb_ctx, -1, NULL, NULL, 4068 p2p->invite_peer->info.p2p_device_addr, 4069 0, 0); 4070 } 4071 p2p_set_state(p2p, P2P_IDLE); 4072 } 4073} 4074 4075 4076static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx) 4077{ 4078 struct p2p_data *p2p = eloop_ctx; 4079 4080 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state)); 4081 4082 p2p->in_listen = 0; 4083 if (p2p->drv_in_listen) { 4084 p2p_dbg(p2p, "Driver is still in listen state - stop it"); 4085 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 4086 } 4087 4088 switch (p2p->state) { 4089 case P2P_IDLE: 4090 /* Check if we timed out waiting for PD req */ 4091 if (p2p->pending_action_state == P2P_PENDING_PD) 4092 p2p_timeout_prov_disc_req(p2p); 4093 break; 4094 case P2P_SEARCH: 4095 /* Check if we timed out waiting for PD req */ 4096 if (p2p->pending_action_state == P2P_PENDING_PD) 4097 p2p_timeout_prov_disc_req(p2p); 4098 if (p2p->search_delay && !p2p->in_search_delay) { 4099 p2p_dbg(p2p, "Delay search operation by %u ms", 4100 p2p->search_delay); 4101 p2p->in_search_delay = 1; 4102 p2p_set_timeout(p2p, p2p->search_delay / 1000, 4103 (p2p->search_delay % 1000) * 1000); 4104 break; 4105 } 4106 p2p->in_search_delay = 0; 4107 p2p_search(p2p); 4108 break; 4109 case P2P_CONNECT: 4110 p2p_timeout_connect(p2p); 4111 break; 4112 case P2P_CONNECT_LISTEN: 4113 p2p_timeout_connect_listen(p2p); 4114 break; 4115 case P2P_GO_NEG: 4116 break; 4117 case P2P_LISTEN_ONLY: 4118 /* Check if we timed out waiting for PD req */ 4119 if (p2p->pending_action_state == P2P_PENDING_PD) 4120 p2p_timeout_prov_disc_req(p2p); 4121 4122 if (p2p->ext_listen_only) { 4123 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed"); 4124 p2p->ext_listen_only = 0; 4125 p2p_set_state(p2p, P2P_IDLE); 4126 } 4127 break; 4128 case P2P_WAIT_PEER_CONNECT: 4129 p2p_timeout_wait_peer_connect(p2p); 4130 break; 4131 case P2P_WAIT_PEER_IDLE: 4132 p2p_timeout_wait_peer_idle(p2p); 4133 break; 4134 case P2P_SD_DURING_FIND: 4135 p2p_timeout_sd_during_find(p2p); 4136 break; 4137 case P2P_PROVISIONING: 4138 break; 4139 case P2P_PD_DURING_FIND: 4140 p2p_timeout_prov_disc_during_find(p2p); 4141 break; 4142 case P2P_INVITE: 4143 p2p_timeout_invite(p2p); 4144 break; 4145 case P2P_INVITE_LISTEN: 4146 p2p_timeout_invite_listen(p2p); 4147 break; 4148 } 4149} 4150 4151 4152int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr) 4153{ 4154 struct p2p_device *dev; 4155 4156 dev = p2p_get_device(p2p, peer_addr); 4157 p2p_dbg(p2p, "Local request to reject connection attempts by peer " 4158 MACSTR, MAC2STR(peer_addr)); 4159 if (dev == NULL) { 4160 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr)); 4161 return -1; 4162 } 4163 dev->status = P2P_SC_FAIL_REJECTED_BY_USER; 4164 dev->flags |= P2P_DEV_USER_REJECTED; 4165 return 0; 4166} 4167 4168 4169const char * p2p_wps_method_text(enum p2p_wps_method method) 4170{ 4171 switch (method) { 4172 case WPS_NOT_READY: 4173 return "not-ready"; 4174 case WPS_PIN_DISPLAY: 4175 return "Display"; 4176 case WPS_PIN_KEYPAD: 4177 return "Keypad"; 4178 case WPS_PBC: 4179 return "PBC"; 4180 case WPS_NFC: 4181 return "NFC"; 4182 case WPS_P2PS: 4183 return "P2PS"; 4184 } 4185 4186 return "??"; 4187} 4188 4189 4190static const char * p2p_go_state_text(enum p2p_go_state go_state) 4191{ 4192 switch (go_state) { 4193 case UNKNOWN_GO: 4194 return "unknown"; 4195 case LOCAL_GO: 4196 return "local"; 4197 case REMOTE_GO: 4198 return "remote"; 4199 } 4200 4201 return "??"; 4202} 4203 4204 4205const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p, 4206 const u8 *addr, int next) 4207{ 4208 struct p2p_device *dev; 4209 4210 if (addr) 4211 dev = p2p_get_device(p2p, addr); 4212 else 4213 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4214 4215 if (dev && next) { 4216 dev = dl_list_first(&dev->list, struct p2p_device, list); 4217 if (&dev->list == &p2p->devices) 4218 dev = NULL; 4219 } 4220 4221 if (dev == NULL) 4222 return NULL; 4223 4224 return &dev->info; 4225} 4226 4227 4228int p2p_get_peer_info_txt(const struct p2p_peer_info *info, 4229 char *buf, size_t buflen) 4230{ 4231 struct p2p_device *dev; 4232 int res; 4233 char *pos, *end; 4234 struct os_reltime now; 4235 4236 if (info == NULL) 4237 return -1; 4238 4239 dev = (struct p2p_device *) (((u8 *) info) - 4240 offsetof(struct p2p_device, info)); 4241 4242 pos = buf; 4243 end = buf + buflen; 4244 4245 os_get_reltime(&now); 4246 res = os_snprintf(pos, end - pos, 4247 "age=%d\n" 4248 "listen_freq=%d\n" 4249 "wps_method=%s\n" 4250 "interface_addr=" MACSTR "\n" 4251 "member_in_go_dev=" MACSTR "\n" 4252 "member_in_go_iface=" MACSTR "\n" 4253 "go_neg_req_sent=%d\n" 4254 "go_state=%s\n" 4255 "dialog_token=%u\n" 4256 "intended_addr=" MACSTR "\n" 4257 "country=%c%c\n" 4258 "oper_freq=%d\n" 4259 "req_config_methods=0x%x\n" 4260 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n" 4261 "status=%d\n" 4262 "invitation_reqs=%u\n", 4263 (int) (now.sec - dev->last_seen.sec), 4264 dev->listen_freq, 4265 p2p_wps_method_text(dev->wps_method), 4266 MAC2STR(dev->interface_addr), 4267 MAC2STR(dev->member_in_go_dev), 4268 MAC2STR(dev->member_in_go_iface), 4269 dev->go_neg_req_sent, 4270 p2p_go_state_text(dev->go_state), 4271 dev->dialog_token, 4272 MAC2STR(dev->intended_addr), 4273 dev->country[0] ? dev->country[0] : '_', 4274 dev->country[1] ? dev->country[1] : '_', 4275 dev->oper_freq, 4276 dev->req_config_methods, 4277 dev->flags & P2P_DEV_PROBE_REQ_ONLY ? 4278 "[PROBE_REQ_ONLY]" : "", 4279 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "", 4280 dev->flags & P2P_DEV_NOT_YET_READY ? 4281 "[NOT_YET_READY]" : "", 4282 dev->flags & P2P_DEV_PD_PEER_DISPLAY ? 4283 "[PD_PEER_DISPLAY]" : "", 4284 dev->flags & P2P_DEV_PD_PEER_KEYPAD ? 4285 "[PD_PEER_KEYPAD]" : "", 4286 dev->flags & P2P_DEV_PD_PEER_P2PS ? 4287 "[PD_PEER_P2PS]" : "", 4288 dev->flags & P2P_DEV_USER_REJECTED ? 4289 "[USER_REJECTED]" : "", 4290 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ? 4291 "[PEER_WAITING_RESPONSE]" : "", 4292 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ? 4293 "[PREFER_PERSISTENT_GROUP]" : "", 4294 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ? 4295 "[WAIT_GO_NEG_RESPONSE]" : "", 4296 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ? 4297 "[WAIT_GO_NEG_CONFIRM]" : "", 4298 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ? 4299 "[GROUP_CLIENT_ONLY]" : "", 4300 dev->flags & P2P_DEV_FORCE_FREQ ? 4301 "[FORCE_FREQ]" : "", 4302 dev->flags & P2P_DEV_PD_FOR_JOIN ? 4303 "[PD_FOR_JOIN]" : "", 4304 dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT ? 4305 "[LAST_SEEN_AS_GROUP_CLIENT]" : "", 4306 dev->status, 4307 dev->invitation_reqs); 4308 if (os_snprintf_error(end - pos, res)) 4309 return pos - buf; 4310 pos += res; 4311 4312 if (dev->ext_listen_period) { 4313 res = os_snprintf(pos, end - pos, 4314 "ext_listen_period=%u\n" 4315 "ext_listen_interval=%u\n", 4316 dev->ext_listen_period, 4317 dev->ext_listen_interval); 4318 if (os_snprintf_error(end - pos, res)) 4319 return pos - buf; 4320 pos += res; 4321 } 4322 4323 if (dev->oper_ssid_len) { 4324 res = os_snprintf(pos, end - pos, 4325 "oper_ssid=%s\n", 4326 wpa_ssid_txt(dev->oper_ssid, 4327 dev->oper_ssid_len)); 4328 if (os_snprintf_error(end - pos, res)) 4329 return pos - buf; 4330 pos += res; 4331 } 4332 4333#ifdef CONFIG_WIFI_DISPLAY 4334 if (dev->info.wfd_subelems) { 4335 res = os_snprintf(pos, end - pos, "wfd_subelems="); 4336 if (os_snprintf_error(end - pos, res)) 4337 return pos - buf; 4338 pos += res; 4339 4340 pos += wpa_snprintf_hex(pos, end - pos, 4341 wpabuf_head(dev->info.wfd_subelems), 4342 wpabuf_len(dev->info.wfd_subelems)); 4343 4344 res = os_snprintf(pos, end - pos, "\n"); 4345 if (os_snprintf_error(end - pos, res)) 4346 return pos - buf; 4347 pos += res; 4348 } 4349#endif /* CONFIG_WIFI_DISPLAY */ 4350 4351 return pos - buf; 4352} 4353 4354 4355int p2p_peer_known(struct p2p_data *p2p, const u8 *addr) 4356{ 4357 return p2p_get_device(p2p, addr) != NULL; 4358} 4359 4360 4361void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled) 4362{ 4363 if (enabled) { 4364 p2p_dbg(p2p, "Client discoverability enabled"); 4365 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 4366 } else { 4367 p2p_dbg(p2p, "Client discoverability disabled"); 4368 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 4369 } 4370} 4371 4372 4373static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1, 4374 u32 duration2, u32 interval2) 4375{ 4376 struct wpabuf *req; 4377 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL; 4378 u8 *len; 4379 4380 req = wpabuf_alloc(100); 4381 if (req == NULL) 4382 return NULL; 4383 4384 if (duration1 || interval1) { 4385 os_memset(&desc1, 0, sizeof(desc1)); 4386 desc1.count_type = 1; 4387 desc1.duration = duration1; 4388 desc1.interval = interval1; 4389 ptr1 = &desc1; 4390 4391 if (duration2 || interval2) { 4392 os_memset(&desc2, 0, sizeof(desc2)); 4393 desc2.count_type = 2; 4394 desc2.duration = duration2; 4395 desc2.interval = interval2; 4396 ptr2 = &desc2; 4397 } 4398 } 4399 4400 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1); 4401 len = p2p_buf_add_ie_hdr(req); 4402 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2); 4403 p2p_buf_update_ie_hdr(req, len); 4404 4405 return req; 4406} 4407 4408 4409int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr, 4410 const u8 *own_interface_addr, unsigned int freq, 4411 u32 duration1, u32 interval1, u32 duration2, 4412 u32 interval2) 4413{ 4414 struct wpabuf *req; 4415 4416 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR 4417 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u " 4418 "dur2=%u int2=%u", 4419 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr), 4420 freq, duration1, interval1, duration2, interval2); 4421 4422 req = p2p_build_presence_req(duration1, interval1, duration2, 4423 interval2); 4424 if (req == NULL) 4425 return -1; 4426 4427 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 4428 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr, 4429 go_interface_addr, 4430 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 4431 p2p_dbg(p2p, "Failed to send Action frame"); 4432 } 4433 wpabuf_free(req); 4434 4435 return 0; 4436} 4437 4438 4439static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa, 4440 size_t noa_len, u8 dialog_token) 4441{ 4442 struct wpabuf *resp; 4443 u8 *len; 4444 4445 resp = wpabuf_alloc(100 + noa_len); 4446 if (resp == NULL) 4447 return NULL; 4448 4449 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token); 4450 len = p2p_buf_add_ie_hdr(resp); 4451 p2p_buf_add_status(resp, status); 4452 if (noa) { 4453 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE); 4454 wpabuf_put_le16(resp, noa_len); 4455 wpabuf_put_data(resp, noa, noa_len); 4456 } else 4457 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL); 4458 p2p_buf_update_ie_hdr(resp, len); 4459 4460 return resp; 4461} 4462 4463 4464static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 4465 const u8 *sa, const u8 *data, size_t len, 4466 int rx_freq) 4467{ 4468 struct p2p_message msg; 4469 u8 status; 4470 struct wpabuf *resp; 4471 size_t g; 4472 struct p2p_group *group = NULL; 4473 int parsed = 0; 4474 u8 noa[50]; 4475 int noa_len; 4476 4477 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request"); 4478 4479 for (g = 0; g < p2p->num_groups; g++) { 4480 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]), 4481 ETH_ALEN) == 0) { 4482 group = p2p->groups[g]; 4483 break; 4484 } 4485 } 4486 if (group == NULL) { 4487 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group " 4488 MACSTR, MAC2STR(da)); 4489 return; 4490 } 4491 4492 if (p2p_parse(data, len, &msg) < 0) { 4493 p2p_dbg(p2p, "Failed to parse P2P Presence Request"); 4494 status = P2P_SC_FAIL_INVALID_PARAMS; 4495 goto fail; 4496 } 4497 parsed = 1; 4498 4499 if (msg.noa == NULL) { 4500 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request"); 4501 status = P2P_SC_FAIL_INVALID_PARAMS; 4502 goto fail; 4503 } 4504 4505 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len); 4506 4507fail: 4508 if (p2p->cfg->get_noa) 4509 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa, 4510 sizeof(noa)); 4511 else 4512 noa_len = -1; 4513 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL, 4514 noa_len > 0 ? noa_len : 0, 4515 msg.dialog_token); 4516 if (parsed) 4517 p2p_parse_free(&msg); 4518 if (resp == NULL) 4519 return; 4520 4521 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 4522 if (p2p_send_action(p2p, rx_freq, sa, da, da, 4523 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 4524 p2p_dbg(p2p, "Failed to send Action frame"); 4525 } 4526 wpabuf_free(resp); 4527} 4528 4529 4530static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 4531 const u8 *sa, const u8 *data, size_t len) 4532{ 4533 struct p2p_message msg; 4534 4535 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response"); 4536 4537 if (p2p_parse(data, len, &msg) < 0) { 4538 p2p_dbg(p2p, "Failed to parse P2P Presence Response"); 4539 return; 4540 } 4541 4542 if (msg.status == NULL || msg.noa == NULL) { 4543 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response"); 4544 p2p_parse_free(&msg); 4545 return; 4546 } 4547 4548 if (p2p->cfg->presence_resp) { 4549 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status, 4550 msg.noa, msg.noa_len); 4551 } 4552 4553 if (*msg.status) { 4554 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u", 4555 *msg.status); 4556 p2p_parse_free(&msg); 4557 return; 4558 } 4559 4560 p2p_dbg(p2p, "P2P Presence Request was accepted"); 4561 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA", 4562 msg.noa, msg.noa_len); 4563 /* TODO: process NoA */ 4564 p2p_parse_free(&msg); 4565} 4566 4567 4568static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx) 4569{ 4570 struct p2p_data *p2p = eloop_ctx; 4571 4572 if (p2p->ext_listen_interval) { 4573 /* Schedule next extended listen timeout */ 4574 eloop_register_timeout(p2p->ext_listen_interval_sec, 4575 p2p->ext_listen_interval_usec, 4576 p2p_ext_listen_timeout, p2p, NULL); 4577 } 4578 4579 if ((p2p->cfg->is_p2p_in_progress && 4580 p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) || 4581 (p2p->pending_action_state == P2P_PENDING_PD && 4582 p2p->pd_retries > 0)) { 4583 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)", 4584 p2p_state_txt(p2p->state)); 4585 return; 4586 } 4587 4588 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) { 4589 /* 4590 * This should not really happen, but it looks like the Listen 4591 * command may fail is something else (e.g., a scan) was 4592 * running at an inconvenient time. As a workaround, allow new 4593 * Extended Listen operation to be started. 4594 */ 4595 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again"); 4596 p2p->ext_listen_only = 0; 4597 p2p_set_state(p2p, P2P_IDLE); 4598 } 4599 4600 if (p2p->state != P2P_IDLE) { 4601 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state)); 4602 return; 4603 } 4604 4605 p2p_dbg(p2p, "Extended Listen timeout"); 4606 p2p->ext_listen_only = 1; 4607 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) { 4608 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing"); 4609 p2p->ext_listen_only = 0; 4610 } 4611} 4612 4613 4614int p2p_ext_listen(struct p2p_data *p2p, unsigned int period, 4615 unsigned int interval) 4616{ 4617 if (period > 65535 || interval > 65535 || period > interval || 4618 (period == 0 && interval > 0) || (period > 0 && interval == 0)) { 4619 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u", 4620 period, interval); 4621 return -1; 4622 } 4623 4624 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 4625 4626 if (interval == 0) { 4627 p2p_dbg(p2p, "Disabling Extended Listen Timing"); 4628 p2p->ext_listen_period = 0; 4629 p2p->ext_listen_interval = 0; 4630 return 0; 4631 } 4632 4633 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec", 4634 period, interval); 4635 p2p->ext_listen_period = period; 4636 p2p->ext_listen_interval = interval; 4637 p2p->ext_listen_interval_sec = interval / 1000; 4638 p2p->ext_listen_interval_usec = (interval % 1000) * 1000; 4639 4640 eloop_register_timeout(p2p->ext_listen_interval_sec, 4641 p2p->ext_listen_interval_usec, 4642 p2p_ext_listen_timeout, p2p, NULL); 4643 4644 return 0; 4645} 4646 4647 4648void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 4649 const u8 *ie, size_t ie_len) 4650{ 4651 struct p2p_message msg; 4652 4653 if (bssid == NULL || ie == NULL) 4654 return; 4655 4656 os_memset(&msg, 0, sizeof(msg)); 4657 if (p2p_parse_ies(ie, ie_len, &msg)) 4658 return; 4659 if (msg.minor_reason_code == NULL) { 4660 p2p_parse_free(&msg); 4661 return; 4662 } 4663 4664 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR 4665 " reason_code=%u minor_reason_code=%u", 4666 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4667 4668 p2p_parse_free(&msg); 4669} 4670 4671 4672void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 4673 const u8 *ie, size_t ie_len) 4674{ 4675 struct p2p_message msg; 4676 4677 if (bssid == NULL || ie == NULL) 4678 return; 4679 4680 os_memset(&msg, 0, sizeof(msg)); 4681 if (p2p_parse_ies(ie, ie_len, &msg)) 4682 return; 4683 if (msg.minor_reason_code == NULL) { 4684 p2p_parse_free(&msg); 4685 return; 4686 } 4687 4688 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR 4689 " reason_code=%u minor_reason_code=%u", 4690 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4691 4692 p2p_parse_free(&msg); 4693} 4694 4695 4696void p2p_set_managed_oper(struct p2p_data *p2p, int enabled) 4697{ 4698 if (enabled) { 4699 p2p_dbg(p2p, "Managed P2P Device operations enabled"); 4700 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED; 4701 } else { 4702 p2p_dbg(p2p, "Managed P2P Device operations disabled"); 4703 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED; 4704 } 4705} 4706 4707 4708int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class, 4709 u8 *op_channel, 4710 struct wpa_freq_range_list *avoid_list, 4711 struct wpa_freq_range_list *disallow_list) 4712{ 4713 return p2p_channel_random_social(&p2p->channels, op_class, op_channel, 4714 avoid_list, disallow_list); 4715} 4716 4717 4718int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel, 4719 u8 forced) 4720{ 4721 if (p2p_channel_to_freq(reg_class, channel) < 0) 4722 return -1; 4723 4724 /* 4725 * Listen channel was set in configuration or set by control interface; 4726 * cannot override it. 4727 */ 4728 if (p2p->cfg->channel_forced && forced == 0) { 4729 p2p_dbg(p2p, 4730 "Listen channel was previously configured - do not override based on optimization"); 4731 return -1; 4732 } 4733 4734 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u", 4735 reg_class, channel); 4736 4737 if (p2p->state == P2P_IDLE) { 4738 p2p->cfg->reg_class = reg_class; 4739 p2p->cfg->channel = channel; 4740 p2p->cfg->channel_forced = forced; 4741 } else { 4742 p2p_dbg(p2p, "Defer setting listen channel"); 4743 p2p->pending_reg_class = reg_class; 4744 p2p->pending_channel = channel; 4745 p2p->pending_channel_forced = forced; 4746 } 4747 4748 return 0; 4749} 4750 4751 4752u8 p2p_get_listen_channel(struct p2p_data *p2p) 4753{ 4754 return p2p->cfg->channel; 4755} 4756 4757 4758int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len) 4759{ 4760 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len)); 4761 if (postfix == NULL) { 4762 p2p->cfg->ssid_postfix_len = 0; 4763 return 0; 4764 } 4765 if (len > sizeof(p2p->cfg->ssid_postfix)) 4766 return -1; 4767 os_memcpy(p2p->cfg->ssid_postfix, postfix, len); 4768 p2p->cfg->ssid_postfix_len = len; 4769 return 0; 4770} 4771 4772 4773int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel, 4774 int cfg_op_channel) 4775{ 4776 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0) 4777 return -1; 4778 4779 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u", 4780 op_reg_class, op_channel); 4781 p2p->cfg->op_reg_class = op_reg_class; 4782 p2p->cfg->op_channel = op_channel; 4783 p2p->cfg->cfg_op_channel = cfg_op_channel; 4784 return 0; 4785} 4786 4787 4788int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan, 4789 const struct p2p_channel *pref_chan) 4790{ 4791 struct p2p_channel *n; 4792 4793 if (pref_chan) { 4794 n = os_memdup(pref_chan, 4795 num_pref_chan * sizeof(struct p2p_channel)); 4796 if (n == NULL) 4797 return -1; 4798 } else 4799 n = NULL; 4800 4801 os_free(p2p->cfg->pref_chan); 4802 p2p->cfg->pref_chan = n; 4803 p2p->cfg->num_pref_chan = num_pref_chan; 4804 4805 return 0; 4806} 4807 4808 4809int p2p_set_no_go_freq(struct p2p_data *p2p, 4810 const struct wpa_freq_range_list *list) 4811{ 4812 struct wpa_freq_range *tmp; 4813 4814 if (list == NULL || list->num == 0) { 4815 os_free(p2p->no_go_freq.range); 4816 p2p->no_go_freq.range = NULL; 4817 p2p->no_go_freq.num = 0; 4818 return 0; 4819 } 4820 4821 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range)); 4822 if (tmp == NULL) 4823 return -1; 4824 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range)); 4825 os_free(p2p->no_go_freq.range); 4826 p2p->no_go_freq.range = tmp; 4827 p2p->no_go_freq.num = list->num; 4828 p2p_dbg(p2p, "Updated no GO chan list"); 4829 4830 return 0; 4831} 4832 4833 4834int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr, 4835 u8 *iface_addr) 4836{ 4837 struct p2p_device *dev = p2p_get_device(p2p, dev_addr); 4838 if (dev == NULL || is_zero_ether_addr(dev->interface_addr)) 4839 return -1; 4840 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN); 4841 return 0; 4842} 4843 4844 4845int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr, 4846 u8 *dev_addr) 4847{ 4848 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4849 if (dev == NULL) 4850 return -1; 4851 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN); 4852 return 0; 4853} 4854 4855 4856void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr) 4857{ 4858 os_memcpy(p2p->peer_filter, addr, ETH_ALEN); 4859 if (is_zero_ether_addr(p2p->peer_filter)) 4860 p2p_dbg(p2p, "Disable peer filter"); 4861 else 4862 p2p_dbg(p2p, "Enable peer filter for " MACSTR, 4863 MAC2STR(p2p->peer_filter)); 4864} 4865 4866 4867void p2p_set_cross_connect(struct p2p_data *p2p, int enabled) 4868{ 4869 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled"); 4870 if (p2p->cross_connect == enabled) 4871 return; 4872 p2p->cross_connect = enabled; 4873 /* TODO: may need to tear down any action group where we are GO(?) */ 4874} 4875 4876 4877int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr) 4878{ 4879 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4880 if (dev == NULL) 4881 return -1; 4882 if (dev->oper_freq <= 0) 4883 return -1; 4884 return dev->oper_freq; 4885} 4886 4887 4888void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled) 4889{ 4890 p2p_dbg(p2p, "Intra BSS distribution %s", 4891 enabled ? "enabled" : "disabled"); 4892 p2p->cfg->p2p_intra_bss = enabled; 4893} 4894 4895 4896void p2p_update_channel_list(struct p2p_data *p2p, 4897 const struct p2p_channels *chan, 4898 const struct p2p_channels *cli_chan) 4899{ 4900 p2p_dbg(p2p, "Update channel list"); 4901 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels)); 4902 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 4903 os_memcpy(&p2p->cfg->cli_channels, cli_chan, 4904 sizeof(struct p2p_channels)); 4905 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 4906} 4907 4908 4909int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 4910 const u8 *src, const u8 *bssid, const u8 *buf, 4911 size_t len, unsigned int wait_time) 4912{ 4913 int res, scheduled; 4914 4915 res = p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid, 4916 buf, len, wait_time, &scheduled); 4917 if (res == 0 && scheduled && p2p->in_listen && freq > 0 && 4918 (unsigned int) p2p->drv_in_listen != freq) { 4919 p2p_dbg(p2p, 4920 "Stop listen on %d MHz to allow a frame to be sent immediately on %d MHz", 4921 p2p->drv_in_listen, freq); 4922 p2p_stop_listen_for_freq(p2p, freq); 4923 } 4924 return res; 4925} 4926 4927 4928void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5, 4929 int freq_overall) 4930{ 4931 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d", 4932 freq_24, freq_5, freq_overall); 4933 p2p->best_freq_24 = freq_24; 4934 p2p->best_freq_5 = freq_5; 4935 p2p->best_freq_overall = freq_overall; 4936} 4937 4938 4939void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq) 4940{ 4941 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq); 4942 p2p->own_freq_preference = freq; 4943} 4944 4945 4946const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p) 4947{ 4948 if (p2p == NULL || p2p->go_neg_peer == NULL) 4949 return NULL; 4950 return p2p->go_neg_peer->info.p2p_device_addr; 4951} 4952 4953 4954const struct p2p_peer_info * 4955p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next) 4956{ 4957 struct p2p_device *dev; 4958 4959 if (addr) { 4960 dev = p2p_get_device(p2p, addr); 4961 if (!dev) 4962 return NULL; 4963 4964 if (!next) { 4965 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 4966 return NULL; 4967 4968 return &dev->info; 4969 } else { 4970 do { 4971 dev = dl_list_first(&dev->list, 4972 struct p2p_device, 4973 list); 4974 if (!dev || &dev->list == &p2p->devices) 4975 return NULL; 4976 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY); 4977 } 4978 } else { 4979 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4980 if (!dev) 4981 return NULL; 4982 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 4983 dev = dl_list_first(&dev->list, 4984 struct p2p_device, 4985 list); 4986 if (!dev || &dev->list == &p2p->devices) 4987 return NULL; 4988 } 4989 } 4990 4991 return &dev->info; 4992} 4993 4994 4995int p2p_in_progress(struct p2p_data *p2p) 4996{ 4997 if (p2p == NULL) 4998 return 0; 4999 if (p2p->state == P2P_SEARCH) 5000 return 2; 5001 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING; 5002} 5003 5004 5005void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout, 5006 u8 client_timeout) 5007{ 5008 if (p2p) { 5009 p2p->go_timeout = go_timeout; 5010 p2p->client_timeout = client_timeout; 5011 } 5012} 5013 5014 5015#ifdef CONFIG_WIFI_DISPLAY 5016 5017static void p2p_update_wfd_ie_groups(struct p2p_data *p2p) 5018{ 5019 size_t g; 5020 struct p2p_group *group; 5021 5022 for (g = 0; g < p2p->num_groups; g++) { 5023 group = p2p->groups[g]; 5024 p2p_group_force_beacon_update_ies(group); 5025 } 5026} 5027 5028 5029int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie) 5030{ 5031 wpabuf_free(p2p->wfd_ie_beacon); 5032 p2p->wfd_ie_beacon = ie; 5033 p2p_update_wfd_ie_groups(p2p); 5034 return 0; 5035} 5036 5037 5038int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie) 5039{ 5040 wpabuf_free(p2p->wfd_ie_probe_req); 5041 p2p->wfd_ie_probe_req = ie; 5042 return 0; 5043} 5044 5045 5046int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie) 5047{ 5048 wpabuf_free(p2p->wfd_ie_probe_resp); 5049 p2p->wfd_ie_probe_resp = ie; 5050 p2p_update_wfd_ie_groups(p2p); 5051 return 0; 5052} 5053 5054 5055int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie) 5056{ 5057 wpabuf_free(p2p->wfd_ie_assoc_req); 5058 p2p->wfd_ie_assoc_req = ie; 5059 return 0; 5060} 5061 5062 5063int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie) 5064{ 5065 wpabuf_free(p2p->wfd_ie_invitation); 5066 p2p->wfd_ie_invitation = ie; 5067 return 0; 5068} 5069 5070 5071int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie) 5072{ 5073 wpabuf_free(p2p->wfd_ie_prov_disc_req); 5074 p2p->wfd_ie_prov_disc_req = ie; 5075 return 0; 5076} 5077 5078 5079int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie) 5080{ 5081 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 5082 p2p->wfd_ie_prov_disc_resp = ie; 5083 return 0; 5084} 5085 5086 5087int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie) 5088{ 5089 wpabuf_free(p2p->wfd_ie_go_neg); 5090 p2p->wfd_ie_go_neg = ie; 5091 return 0; 5092} 5093 5094 5095int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem) 5096{ 5097 wpabuf_free(p2p->wfd_dev_info); 5098 if (elem) { 5099 p2p->wfd_dev_info = wpabuf_dup(elem); 5100 if (p2p->wfd_dev_info == NULL) 5101 return -1; 5102 } else 5103 p2p->wfd_dev_info = NULL; 5104 5105 return 0; 5106} 5107 5108 5109int p2p_set_wfd_r2_dev_info(struct p2p_data *p2p, const struct wpabuf *elem) 5110{ 5111 wpabuf_free(p2p->wfd_r2_dev_info); 5112 if (elem) { 5113 p2p->wfd_r2_dev_info = wpabuf_dup(elem); 5114 if (p2p->wfd_r2_dev_info == NULL) 5115 return -1; 5116 } else 5117 p2p->wfd_r2_dev_info = NULL; 5118 5119 return 0; 5120} 5121 5122 5123int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem) 5124{ 5125 wpabuf_free(p2p->wfd_assoc_bssid); 5126 if (elem) { 5127 p2p->wfd_assoc_bssid = wpabuf_dup(elem); 5128 if (p2p->wfd_assoc_bssid == NULL) 5129 return -1; 5130 } else 5131 p2p->wfd_assoc_bssid = NULL; 5132 5133 return 0; 5134} 5135 5136 5137int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p, 5138 const struct wpabuf *elem) 5139{ 5140 wpabuf_free(p2p->wfd_coupled_sink_info); 5141 if (elem) { 5142 p2p->wfd_coupled_sink_info = wpabuf_dup(elem); 5143 if (p2p->wfd_coupled_sink_info == NULL) 5144 return -1; 5145 } else 5146 p2p->wfd_coupled_sink_info = NULL; 5147 5148 return 0; 5149} 5150 5151#endif /* CONFIG_WIFI_DISPLAY */ 5152 5153 5154int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int, 5155 int max_disc_tu) 5156{ 5157 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0) 5158 return -1; 5159 5160 p2p->min_disc_int = min_disc_int; 5161 p2p->max_disc_int = max_disc_int; 5162 p2p->max_disc_tu = max_disc_tu; 5163 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d", 5164 min_disc_int, max_disc_int, max_disc_tu); 5165 5166 return 0; 5167} 5168 5169 5170void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...) 5171{ 5172 va_list ap; 5173 char buf[500]; 5174 5175 if (!p2p->cfg->debug_print) 5176 return; 5177 5178 va_start(ap, fmt); 5179 vsnprintf(buf, sizeof(buf), fmt, ap); 5180 buf[sizeof(buf) - 1] = '\0'; 5181 va_end(ap); 5182 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf); 5183} 5184 5185 5186void p2p_info(struct p2p_data *p2p, const char *fmt, ...) 5187{ 5188 va_list ap; 5189 char buf[500]; 5190 5191 if (!p2p->cfg->debug_print) 5192 return; 5193 5194 va_start(ap, fmt); 5195 vsnprintf(buf, sizeof(buf), fmt, ap); 5196 buf[sizeof(buf) - 1] = '\0'; 5197 va_end(ap); 5198 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf); 5199} 5200 5201 5202void p2p_err(struct p2p_data *p2p, const char *fmt, ...) 5203{ 5204 va_list ap; 5205 char buf[500]; 5206 5207 if (!p2p->cfg->debug_print) 5208 return; 5209 5210 va_start(ap, fmt); 5211 vsnprintf(buf, sizeof(buf), fmt, ap); 5212 buf[sizeof(buf) - 1] = '\0'; 5213 va_end(ap); 5214 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf); 5215} 5216 5217 5218void p2p_loop_on_known_peers(struct p2p_data *p2p, 5219 void (*peer_callback)(struct p2p_peer_info *peer, 5220 void *user_data), 5221 void *user_data) 5222{ 5223 struct p2p_device *dev, *n; 5224 5225 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) { 5226 peer_callback(&dev->info, user_data); 5227 } 5228} 5229 5230 5231#ifdef CONFIG_WPS_NFC 5232 5233static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p, 5234 int client_freq, 5235 const u8 *go_dev_addr, 5236 const u8 *ssid, size_t ssid_len) 5237{ 5238 struct wpabuf *buf; 5239 u8 op_class, channel; 5240 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP; 5241 5242 buf = wpabuf_alloc(1000); 5243 if (buf == NULL) 5244 return NULL; 5245 5246 op_class = p2p->cfg->reg_class; 5247 channel = p2p->cfg->channel; 5248 5249 p2p_buf_add_capability(buf, p2p->dev_capab & 5250 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 5251 p2p_buf_add_device_info(buf, p2p, NULL); 5252 5253 if (p2p->num_groups > 0) { 5254 int freq = p2p_group_get_freq(p2p->groups[0]); 5255 role = P2P_GO_IN_A_GROUP; 5256 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) { 5257 p2p_dbg(p2p, 5258 "Unknown GO operating frequency %d MHz for NFC handover", 5259 freq); 5260 wpabuf_free(buf); 5261 return NULL; 5262 } 5263 } else if (client_freq > 0) { 5264 role = P2P_CLIENT_IN_A_GROUP; 5265 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) { 5266 p2p_dbg(p2p, 5267 "Unknown client operating frequency %d MHz for NFC handover", 5268 client_freq); 5269 wpabuf_free(buf); 5270 return NULL; 5271 } 5272 } 5273 5274 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class, 5275 channel, role); 5276 5277 if (p2p->num_groups > 0) { 5278 /* Limit number of clients to avoid very long message */ 5279 p2p_buf_add_group_info(p2p->groups[0], buf, 5); 5280 p2p_group_buf_add_id(p2p->groups[0], buf); 5281 } else if (client_freq > 0 && 5282 go_dev_addr && !is_zero_ether_addr(go_dev_addr) && 5283 ssid && ssid_len > 0) { 5284 /* 5285 * Add the optional P2P Group ID to indicate in which group this 5286 * device is a P2P Client. 5287 */ 5288 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len); 5289 } 5290 5291 return buf; 5292} 5293 5294 5295struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p, 5296 int client_freq, 5297 const u8 *go_dev_addr, 5298 const u8 *ssid, size_t ssid_len) 5299{ 5300 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 5301 ssid_len); 5302} 5303 5304 5305struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p, 5306 int client_freq, 5307 const u8 *go_dev_addr, 5308 const u8 *ssid, size_t ssid_len) 5309{ 5310 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 5311 ssid_len); 5312} 5313 5314 5315int p2p_process_nfc_connection_handover(struct p2p_data *p2p, 5316 struct p2p_nfc_params *params) 5317{ 5318 struct p2p_message msg; 5319 struct p2p_device *dev; 5320 const u8 *p2p_dev_addr; 5321 int freq; 5322 enum p2p_role_indication role; 5323 5324 params->next_step = NO_ACTION; 5325 5326 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len, 5327 params->p2p_attr, params->p2p_len, &msg)) { 5328 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC"); 5329 p2p_parse_free(&msg); 5330 return -1; 5331 } 5332 5333 if (msg.p2p_device_addr) 5334 p2p_dev_addr = msg.p2p_device_addr; 5335 else if (msg.device_id) 5336 p2p_dev_addr = msg.device_id; 5337 else { 5338 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 5339 p2p_parse_free(&msg); 5340 return -1; 5341 } 5342 5343 if (msg.oob_dev_password) { 5344 os_memcpy(params->oob_dev_pw, msg.oob_dev_password, 5345 msg.oob_dev_password_len); 5346 params->oob_dev_pw_len = msg.oob_dev_password_len; 5347 } 5348 5349 dev = p2p_create_device(p2p, p2p_dev_addr); 5350 if (dev == NULL) { 5351 p2p_parse_free(&msg); 5352 return -1; 5353 } 5354 5355 params->peer = &dev->info; 5356 5357 os_get_reltime(&dev->last_seen); 5358 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 5359 p2p_copy_wps_info(p2p, dev, 0, &msg); 5360 5361 if (!msg.oob_go_neg_channel) { 5362 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included"); 5363 p2p_parse_free(&msg); 5364 return -1; 5365 } 5366 5367 if (msg.oob_go_neg_channel[3] == 0 && 5368 msg.oob_go_neg_channel[4] == 0) 5369 freq = 0; 5370 else 5371 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3], 5372 msg.oob_go_neg_channel[4]); 5373 if (freq < 0) { 5374 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel"); 5375 p2p_parse_free(&msg); 5376 return -1; 5377 } 5378 role = msg.oob_go_neg_channel[5]; 5379 5380 if (role == P2P_GO_IN_A_GROUP) { 5381 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq); 5382 params->go_freq = freq; 5383 } else if (role == P2P_CLIENT_IN_A_GROUP) { 5384 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz", 5385 freq); 5386 params->go_freq = freq; 5387 } else 5388 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq); 5389 dev->oob_go_neg_freq = freq; 5390 5391 if (!params->sel && role != P2P_GO_IN_A_GROUP) { 5392 freq = p2p_channel_to_freq(p2p->cfg->reg_class, 5393 p2p->cfg->channel); 5394 if (freq < 0) { 5395 p2p_dbg(p2p, "Own listen channel not known"); 5396 p2p_parse_free(&msg); 5397 return -1; 5398 } 5399 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq); 5400 dev->oob_go_neg_freq = freq; 5401 } 5402 5403 if (msg.group_id) { 5404 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN); 5405 params->go_ssid_len = msg.group_id_len - ETH_ALEN; 5406 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN, 5407 params->go_ssid_len); 5408 } 5409 5410 if (dev->flags & P2P_DEV_USER_REJECTED) { 5411 p2p_dbg(p2p, "Do not report rejected device"); 5412 p2p_parse_free(&msg); 5413 return 0; 5414 } 5415 5416 if (!(dev->flags & P2P_DEV_REPORTED)) { 5417 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info, 5418 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 5419 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 5420 } 5421 p2p_parse_free(&msg); 5422 5423 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0) 5424 params->next_step = BOTH_GO; 5425 else if (role == P2P_GO_IN_A_GROUP) 5426 params->next_step = JOIN_GROUP; 5427 else if (role == P2P_CLIENT_IN_A_GROUP) { 5428 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 5429 params->next_step = PEER_CLIENT; 5430 } else if (p2p->num_groups > 0) 5431 params->next_step = AUTH_JOIN; 5432 else if (params->sel) 5433 params->next_step = INIT_GO_NEG; 5434 else 5435 params->next_step = RESP_GO_NEG; 5436 5437 return 0; 5438} 5439 5440 5441void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id, 5442 int go_intent, 5443 const u8 *own_interface_addr) 5444{ 5445 5446 p2p->authorized_oob_dev_pw_id = dev_pw_id; 5447 if (dev_pw_id == 0) { 5448 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover"); 5449 return; 5450 } 5451 5452 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover", 5453 dev_pw_id); 5454 5455 p2p->go_intent = go_intent; 5456 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 5457} 5458 5459#endif /* CONFIG_WPS_NFC */ 5460 5461 5462int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len) 5463{ 5464 if (len < 8 || len > 63) 5465 return -1; 5466 p2p->cfg->passphrase_len = len; 5467 return 0; 5468} 5469 5470 5471void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem) 5472{ 5473 p2p->vendor_elem = vendor_elem; 5474} 5475 5476 5477void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx) 5478{ 5479 struct p2p_data *p2p = eloop_ctx; 5480 5481 p2p_dbg(p2p, 5482 "Timeout on waiting peer to become ready for GO Negotiation"); 5483 p2p_go_neg_failed(p2p, -1); 5484} 5485 5486 5487void p2p_set_own_pref_freq_list(struct p2p_data *p2p, 5488 const unsigned int *pref_freq_list, 5489 unsigned int size) 5490{ 5491 unsigned int i; 5492 5493 if (size > P2P_MAX_PREF_CHANNELS) 5494 size = P2P_MAX_PREF_CHANNELS; 5495 p2p->num_pref_freq = size; 5496 for (i = 0; i < size; i++) { 5497 p2p->pref_freq_list[i] = pref_freq_list[i]; 5498 p2p_dbg(p2p, "Own preferred frequency list[%u]=%u MHz", 5499 i, p2p->pref_freq_list[i]); 5500 } 5501} 5502 5503 5504void p2p_set_override_pref_op_chan(struct p2p_data *p2p, u8 op_class, 5505 u8 chan) 5506{ 5507 p2p->override_pref_op_class = op_class; 5508 p2p->override_pref_channel = chan; 5509} 5510 5511 5512struct wpabuf * p2p_build_probe_resp_template(struct p2p_data *p2p, 5513 unsigned int freq) 5514{ 5515 struct wpabuf *ies, *buf; 5516 u8 addr[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 5517 int ret; 5518 5519 ies = p2p_build_probe_resp_ies(p2p, NULL, 0); 5520 if (!ies) { 5521 wpa_printf(MSG_ERROR, 5522 "CTRL: Failed to build Probe Response IEs"); 5523 return NULL; 5524 } 5525 5526 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 5527 if (!buf) { 5528 wpabuf_free(ies); 5529 return NULL; 5530 } 5531 5532 ret = p2p_build_probe_resp_buf(p2p, buf, ies, addr, freq); 5533 wpabuf_free(ies); 5534 if (ret) { 5535 wpabuf_free(buf); 5536 return NULL; 5537 } 5538 5539 return buf; 5540} 5541