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/ieee802_11_defs.h" 14#include "common/ieee802_11_common.h" 15#include "common/wpa_ctrl.h" 16#include "crypto/sha256.h" 17#include "crypto/crypto.h" 18#include "wps/wps_i.h" 19#include "p2p_i.h" 20#include "p2p.h" 21 22 23static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx); 24static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev); 25static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 26 const u8 *sa, const u8 *data, size_t len, 27 int rx_freq); 28static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 29 const u8 *sa, const u8 *data, 30 size_t len); 31static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx); 32static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx); 33 34 35/* 36 * p2p_scan recovery timeout 37 * 38 * Many drivers are using 30 second timeout on scan results. Allow a bit larger 39 * timeout for this to avoid hitting P2P timeout unnecessarily. 40 */ 41#define P2P_SCAN_TIMEOUT 35 42 43/** 44 * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer 45 * entries will be removed 46 */ 47#ifndef P2P_PEER_EXPIRATION_AGE 48#define P2P_PEER_EXPIRATION_AGE 60 49#endif /* P2P_PEER_EXPIRATION_AGE */ 50 51#define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2) 52 53static void p2p_expire_peers(struct p2p_data *p2p) 54{ 55 struct p2p_device *dev, *n; 56 struct os_reltime now; 57 size_t i; 58 59 os_get_reltime(&now); 60 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) { 61 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec) 62 continue; 63 64 if (dev == p2p->go_neg_peer) { 65 /* 66 * GO Negotiation is in progress with the peer, so 67 * don't expire the peer entry until GO Negotiation 68 * fails or times out. 69 */ 70 continue; 71 } 72 73 if (p2p->cfg->go_connected && 74 p2p->cfg->go_connected(p2p->cfg->cb_ctx, 75 dev->info.p2p_device_addr)) { 76 /* 77 * We are connected as a client to a group in which the 78 * peer is the GO, so do not expire the peer entry. 79 */ 80 os_get_reltime(&dev->last_seen); 81 continue; 82 } 83 84 for (i = 0; i < p2p->num_groups; i++) { 85 if (p2p_group_is_client_connected( 86 p2p->groups[i], dev->info.p2p_device_addr)) 87 break; 88 } 89 if (i < p2p->num_groups) { 90 /* 91 * The peer is connected as a client in a group where 92 * we are the GO, so do not expire the peer entry. 93 */ 94 os_get_reltime(&dev->last_seen); 95 continue; 96 } 97 98 p2p_dbg(p2p, "Expiring old peer entry " MACSTR, 99 MAC2STR(dev->info.p2p_device_addr)); 100 dl_list_del(&dev->list); 101 p2p_device_free(p2p, dev); 102 } 103} 104 105 106static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx) 107{ 108 struct p2p_data *p2p = eloop_ctx; 109 p2p_expire_peers(p2p); 110 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 111 p2p_expiration_timeout, p2p, NULL); 112} 113 114 115static const char * p2p_state_txt(int state) 116{ 117 switch (state) { 118 case P2P_IDLE: 119 return "IDLE"; 120 case P2P_SEARCH: 121 return "SEARCH"; 122 case P2P_CONNECT: 123 return "CONNECT"; 124 case P2P_CONNECT_LISTEN: 125 return "CONNECT_LISTEN"; 126 case P2P_GO_NEG: 127 return "GO_NEG"; 128 case P2P_LISTEN_ONLY: 129 return "LISTEN_ONLY"; 130 case P2P_WAIT_PEER_CONNECT: 131 return "WAIT_PEER_CONNECT"; 132 case P2P_WAIT_PEER_IDLE: 133 return "WAIT_PEER_IDLE"; 134 case P2P_SD_DURING_FIND: 135 return "SD_DURING_FIND"; 136 case P2P_PROVISIONING: 137 return "PROVISIONING"; 138 case P2P_PD_DURING_FIND: 139 return "PD_DURING_FIND"; 140 case P2P_INVITE: 141 return "INVITE"; 142 case P2P_INVITE_LISTEN: 143 return "INVITE_LISTEN"; 144 default: 145 return "?"; 146 } 147} 148 149 150const char * p2p_get_state_txt(struct p2p_data *p2p) 151{ 152 return p2p_state_txt(p2p->state); 153} 154 155 156struct p2ps_advertisement * p2p_get_p2ps_adv_list(struct p2p_data *p2p) 157{ 158 return p2p ? p2p->p2ps_adv_list : NULL; 159} 160 161 162void p2p_set_intended_addr(struct p2p_data *p2p, const u8 *intended_addr) 163{ 164 if (p2p && intended_addr) 165 os_memcpy(p2p->intended_addr, intended_addr, ETH_ALEN); 166} 167 168 169u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr) 170{ 171 struct p2p_device *dev = NULL; 172 173 if (!addr || !p2p) 174 return 0; 175 176 dev = p2p_get_device(p2p, addr); 177 if (dev) 178 return dev->wps_prov_info; 179 else 180 return 0; 181} 182 183 184void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr) 185{ 186 struct p2p_device *dev = NULL; 187 188 if (!addr || !p2p) 189 return; 190 191 dev = p2p_get_device(p2p, addr); 192 if (dev) 193 dev->wps_prov_info = 0; 194} 195 196 197void p2p_set_state(struct p2p_data *p2p, int new_state) 198{ 199 p2p_dbg(p2p, "State %s -> %s", 200 p2p_state_txt(p2p->state), p2p_state_txt(new_state)); 201 p2p->state = new_state; 202 203 if (new_state == P2P_IDLE && p2p->pending_channel) { 204 p2p_dbg(p2p, "Apply change in listen channel"); 205 p2p->cfg->reg_class = p2p->pending_reg_class; 206 p2p->cfg->channel = p2p->pending_channel; 207 p2p->pending_reg_class = 0; 208 p2p->pending_channel = 0; 209 } 210} 211 212 213void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec) 214{ 215 p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec", 216 p2p_state_txt(p2p->state), sec, usec); 217 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 218 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL); 219} 220 221 222void p2p_clear_timeout(struct p2p_data *p2p) 223{ 224 p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state)); 225 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 226} 227 228 229void p2p_go_neg_failed(struct p2p_data *p2p, int status) 230{ 231 struct p2p_go_neg_results res; 232 struct p2p_device *peer = p2p->go_neg_peer; 233 234 if (!peer) 235 return; 236 237 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL); 238 if (p2p->state != P2P_SEARCH) { 239 /* 240 * Clear timeouts related to GO Negotiation if no new p2p_find 241 * has been started. 242 */ 243 p2p_clear_timeout(p2p); 244 p2p_set_state(p2p, P2P_IDLE); 245 } 246 247 peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 248 peer->wps_method = WPS_NOT_READY; 249 peer->oob_pw_id = 0; 250 wpabuf_free(peer->go_neg_conf); 251 peer->go_neg_conf = NULL; 252 p2p->go_neg_peer = NULL; 253 254 os_memset(&res, 0, sizeof(res)); 255 res.status = status; 256 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 257 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 258 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 259} 260 261 262static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc) 263{ 264 unsigned int r, tu; 265 int freq; 266 struct wpabuf *ies; 267 268 p2p_dbg(p2p, "Starting short listen state (state=%s)", 269 p2p_state_txt(p2p->state)); 270 271 if (p2p->pending_listen_freq) { 272 /* We have a pending p2p_listen request */ 273 p2p_dbg(p2p, "p2p_listen command pending already"); 274 return; 275 } 276 277 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 278 if (freq < 0) { 279 p2p_dbg(p2p, "Unknown regulatory class/channel"); 280 return; 281 } 282 283 if (os_get_random((u8 *) &r, sizeof(r)) < 0) 284 r = 0; 285 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) + 286 p2p->min_disc_int) * 100; 287 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu) 288 tu = p2p->max_disc_tu; 289 if (!dev_disc && tu < 100) 290 tu = 100; /* Need to wait in non-device discovery use cases */ 291 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen) 292 tu = p2p->cfg->max_listen * 1000 / 1024; 293 294 if (tu == 0) { 295 p2p_dbg(p2p, "Skip listen state since duration was 0 TU"); 296 p2p_set_timeout(p2p, 0, 0); 297 return; 298 } 299 300 ies = p2p_build_probe_resp_ies(p2p, NULL, 0); 301 if (ies == NULL) 302 return; 303 304 p2p->pending_listen_freq = freq; 305 p2p->pending_listen_sec = 0; 306 p2p->pending_listen_usec = 1024 * tu; 307 308 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000, 309 ies) < 0) { 310 p2p_dbg(p2p, "Failed to start listen mode"); 311 p2p->pending_listen_freq = 0; 312 } 313 wpabuf_free(ies); 314} 315 316 317int p2p_listen(struct p2p_data *p2p, unsigned int timeout) 318{ 319 int freq; 320 struct wpabuf *ies; 321 322 p2p_dbg(p2p, "Going to listen(only) state"); 323 324 if (p2p->pending_listen_freq) { 325 /* We have a pending p2p_listen request */ 326 p2p_dbg(p2p, "p2p_listen command pending already"); 327 return -1; 328 } 329 330 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 331 if (freq < 0) { 332 p2p_dbg(p2p, "Unknown regulatory class/channel"); 333 return -1; 334 } 335 336 p2p->pending_listen_sec = timeout / 1000; 337 p2p->pending_listen_usec = (timeout % 1000) * 1000; 338 339 if (p2p->p2p_scan_running) { 340 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) { 341 p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen"); 342 return 0; 343 } 344 p2p_dbg(p2p, "p2p_scan running - delay start of listen state"); 345 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN; 346 return 0; 347 } 348 349 ies = p2p_build_probe_resp_ies(p2p, NULL, 0); 350 if (ies == NULL) 351 return -1; 352 353 p2p->pending_listen_freq = freq; 354 355 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) { 356 p2p_dbg(p2p, "Failed to start listen mode"); 357 p2p->pending_listen_freq = 0; 358 wpabuf_free(ies); 359 return -1; 360 } 361 wpabuf_free(ies); 362 363 p2p_set_state(p2p, P2P_LISTEN_ONLY); 364 365 return 0; 366} 367 368 369static void p2p_device_clear_reported(struct p2p_data *p2p) 370{ 371 struct p2p_device *dev; 372 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 373 dev->flags &= ~P2P_DEV_REPORTED; 374 dev->sd_reqs = 0; 375 } 376} 377 378 379/** 380 * p2p_get_device - Fetch a peer entry 381 * @p2p: P2P module context from p2p_init() 382 * @addr: P2P Device Address of the peer 383 * Returns: Pointer to the device entry or %NULL if not found 384 */ 385struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr) 386{ 387 struct p2p_device *dev; 388 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 389 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0) 390 return dev; 391 } 392 return NULL; 393} 394 395 396/** 397 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address 398 * @p2p: P2P module context from p2p_init() 399 * @addr: P2P Interface Address of the peer 400 * Returns: Pointer to the device entry or %NULL if not found 401 */ 402struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p, 403 const u8 *addr) 404{ 405 struct p2p_device *dev; 406 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 407 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0) 408 return dev; 409 } 410 return NULL; 411} 412 413 414/** 415 * p2p_create_device - Create a peer entry 416 * @p2p: P2P module context from p2p_init() 417 * @addr: P2P Device Address of the peer 418 * Returns: Pointer to the device entry or %NULL on failure 419 * 420 * If there is already an entry for the peer, it will be returned instead of 421 * creating a new one. 422 */ 423static struct p2p_device * p2p_create_device(struct p2p_data *p2p, 424 const u8 *addr) 425{ 426 struct p2p_device *dev, *oldest = NULL; 427 size_t count = 0; 428 429 dev = p2p_get_device(p2p, addr); 430 if (dev) 431 return dev; 432 433 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 434 count++; 435 if (oldest == NULL || 436 os_reltime_before(&dev->last_seen, &oldest->last_seen)) 437 oldest = dev; 438 } 439 if (count + 1 > p2p->cfg->max_peers && oldest) { 440 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer"); 441 dl_list_del(&oldest->list); 442 p2p_device_free(p2p, oldest); 443 } 444 445 dev = os_zalloc(sizeof(*dev)); 446 if (dev == NULL) 447 return NULL; 448 dl_list_add(&p2p->devices, &dev->list); 449 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN); 450 451 return dev; 452} 453 454 455static void p2p_copy_client_info(struct p2p_device *dev, 456 struct p2p_client_info *cli) 457{ 458 os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len); 459 dev->info.device_name[cli->dev_name_len] = '\0'; 460 dev->info.dev_capab = cli->dev_capab; 461 dev->info.config_methods = cli->config_methods; 462 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8); 463 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types; 464 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types, 465 dev->info.wps_sec_dev_type_list_len); 466} 467 468 469static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr, 470 const u8 *go_interface_addr, int freq, 471 const u8 *gi, size_t gi_len, 472 struct os_reltime *rx_time) 473{ 474 struct p2p_group_info info; 475 size_t c; 476 struct p2p_device *dev; 477 478 if (gi == NULL) 479 return 0; 480 481 if (p2p_group_info_parse(gi, gi_len, &info) < 0) 482 return -1; 483 484 /* 485 * Clear old data for this group; if the devices are still in the 486 * group, the information will be restored in the loop following this. 487 */ 488 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 489 if (os_memcmp(dev->member_in_go_iface, go_interface_addr, 490 ETH_ALEN) == 0) { 491 os_memset(dev->member_in_go_iface, 0, ETH_ALEN); 492 os_memset(dev->member_in_go_dev, 0, ETH_ALEN); 493 } 494 } 495 496 for (c = 0; c < info.num_clients; c++) { 497 struct p2p_client_info *cli = &info.client[c]; 498 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr, 499 ETH_ALEN) == 0) 500 continue; /* ignore our own entry */ 501 dev = p2p_get_device(p2p, cli->p2p_device_addr); 502 if (dev) { 503 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY | 504 P2P_DEV_PROBE_REQ_ONLY)) { 505 /* 506 * Update information since we have not 507 * received this directly from the client. 508 */ 509 p2p_copy_client_info(dev, cli); 510 } else { 511 /* 512 * Need to update P2P Client Discoverability 513 * flag since it is valid only in P2P Group 514 * Info attribute. 515 */ 516 dev->info.dev_capab &= 517 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 518 dev->info.dev_capab |= 519 cli->dev_capab & 520 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 521 } 522 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 523 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 524 } 525 } else { 526 dev = p2p_create_device(p2p, cli->p2p_device_addr); 527 if (dev == NULL) 528 continue; 529 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 530 p2p_copy_client_info(dev, cli); 531 dev->oper_freq = freq; 532 p2p->cfg->dev_found(p2p->cfg->cb_ctx, 533 dev->info.p2p_device_addr, 534 &dev->info, 1); 535 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 536 } 537 538 os_memcpy(dev->interface_addr, cli->p2p_interface_addr, 539 ETH_ALEN); 540 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime)); 541 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN); 542 os_memcpy(dev->member_in_go_iface, go_interface_addr, 543 ETH_ALEN); 544 dev->flags |= P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT; 545 } 546 547 return 0; 548} 549 550 551static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev, 552 int probe_req, const struct p2p_message *msg) 553{ 554 os_memcpy(dev->info.device_name, msg->device_name, 555 sizeof(dev->info.device_name)); 556 557 if (msg->manufacturer && 558 msg->manufacturer_len < sizeof(dev->info.manufacturer)) { 559 os_memset(dev->info.manufacturer, 0, 560 sizeof(dev->info.manufacturer)); 561 os_memcpy(dev->info.manufacturer, msg->manufacturer, 562 msg->manufacturer_len); 563 } 564 565 if (msg->model_name && 566 msg->model_name_len < sizeof(dev->info.model_name)) { 567 os_memset(dev->info.model_name, 0, 568 sizeof(dev->info.model_name)); 569 os_memcpy(dev->info.model_name, msg->model_name, 570 msg->model_name_len); 571 } 572 573 if (msg->model_number && 574 msg->model_number_len < sizeof(dev->info.model_number)) { 575 os_memset(dev->info.model_number, 0, 576 sizeof(dev->info.model_number)); 577 os_memcpy(dev->info.model_number, msg->model_number, 578 msg->model_number_len); 579 } 580 581 if (msg->serial_number && 582 msg->serial_number_len < sizeof(dev->info.serial_number)) { 583 os_memset(dev->info.serial_number, 0, 584 sizeof(dev->info.serial_number)); 585 os_memcpy(dev->info.serial_number, msg->serial_number, 586 msg->serial_number_len); 587 } 588 589 if (msg->pri_dev_type) 590 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type, 591 sizeof(dev->info.pri_dev_type)); 592 else if (msg->wps_pri_dev_type) 593 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type, 594 sizeof(dev->info.pri_dev_type)); 595 596 if (msg->wps_sec_dev_type_list) { 597 os_memcpy(dev->info.wps_sec_dev_type_list, 598 msg->wps_sec_dev_type_list, 599 msg->wps_sec_dev_type_list_len); 600 dev->info.wps_sec_dev_type_list_len = 601 msg->wps_sec_dev_type_list_len; 602 } 603 604 if (msg->capability) { 605 /* 606 * P2P Client Discoverability bit is reserved in all frames 607 * that use this function, so do not change its value here. 608 */ 609 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 610 dev->info.dev_capab |= msg->capability[0] & 611 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 612 dev->info.group_capab = msg->capability[1]; 613 } 614 615 if (msg->ext_listen_timing) { 616 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing); 617 dev->ext_listen_interval = 618 WPA_GET_LE16(msg->ext_listen_timing + 2); 619 } 620 621 if (!probe_req) { 622 u16 new_config_methods; 623 new_config_methods = msg->config_methods ? 624 msg->config_methods : msg->wps_config_methods; 625 if (new_config_methods && 626 dev->info.config_methods != new_config_methods) { 627 p2p_dbg(p2p, "Update peer " MACSTR 628 " config_methods 0x%x -> 0x%x", 629 MAC2STR(dev->info.p2p_device_addr), 630 dev->info.config_methods, 631 new_config_methods); 632 dev->info.config_methods = new_config_methods; 633 } 634 } 635} 636 637 638static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies, 639 size_t ies_len) 640{ 641 const u8 *pos, *end; 642 u8 id, len; 643 644 wpabuf_free(dev->info.vendor_elems); 645 dev->info.vendor_elems = NULL; 646 647 end = ies + ies_len; 648 649 for (pos = ies; pos + 1 < end; pos += len) { 650 id = *pos++; 651 len = *pos++; 652 653 if (pos + len > end) 654 break; 655 656 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3) 657 continue; 658 659 if (len >= 4) { 660 u32 type = WPA_GET_BE32(pos); 661 662 if (type == WPA_IE_VENDOR_TYPE || 663 type == WMM_IE_VENDOR_TYPE || 664 type == WPS_IE_VENDOR_TYPE || 665 type == P2P_IE_VENDOR_TYPE || 666 type == WFD_IE_VENDOR_TYPE) 667 continue; 668 } 669 670 /* Unknown vendor element - make raw IE data available */ 671 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0) 672 break; 673 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len); 674 } 675} 676 677 678static int p2p_compare_wfd_info(struct p2p_device *dev, 679 const struct p2p_message *msg) 680{ 681 if (dev->info.wfd_subelems && msg->wfd_subelems) { 682 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used) 683 return 1; 684 685 return os_memcmp(dev->info.wfd_subelems->buf, 686 msg->wfd_subelems->buf, 687 dev->info.wfd_subelems->used); 688 } 689 if (dev->info.wfd_subelems || msg->wfd_subelems) 690 return 1; 691 692 return 0; 693} 694 695 696/** 697 * p2p_add_device - Add peer entries based on scan results or P2P frames 698 * @p2p: P2P module context from p2p_init() 699 * @addr: Source address of Beacon or Probe Response frame (may be either 700 * P2P Device Address or P2P Interface Address) 701 * @level: Signal level (signal strength of the received frame from the peer) 702 * @freq: Frequency on which the Beacon or Probe Response frame was received 703 * @rx_time: Time when the result was received 704 * @ies: IEs from the Beacon or Probe Response frame 705 * @ies_len: Length of ies buffer in octets 706 * @scan_res: Whether this was based on scan results 707 * Returns: 0 on success, -1 on failure 708 * 709 * If the scan result is for a GO, the clients in the group will also be added 710 * to the peer table. This function can also be used with some other frames 711 * like Provision Discovery Request that contains P2P Capability and P2P Device 712 * Info attributes. 713 */ 714int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq, 715 struct os_reltime *rx_time, int level, const u8 *ies, 716 size_t ies_len, int scan_res) 717{ 718 struct p2p_device *dev; 719 struct p2p_message msg; 720 const u8 *p2p_dev_addr; 721 int wfd_changed; 722 int i; 723 struct os_reltime time_now; 724 725 os_memset(&msg, 0, sizeof(msg)); 726 if (p2p_parse_ies(ies, ies_len, &msg)) { 727 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry"); 728 p2p_parse_free(&msg); 729 return -1; 730 } 731 732 if (msg.p2p_device_addr) 733 p2p_dev_addr = msg.p2p_device_addr; 734 else if (msg.device_id) 735 p2p_dev_addr = msg.device_id; 736 else { 737 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 738 p2p_parse_free(&msg); 739 return -1; 740 } 741 742 if (!is_zero_ether_addr(p2p->peer_filter) && 743 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) { 744 p2p_dbg(p2p, "Do not add peer filter for " MACSTR 745 " due to peer filter", MAC2STR(p2p_dev_addr)); 746 p2p_parse_free(&msg); 747 return 0; 748 } 749 750 dev = p2p_create_device(p2p, p2p_dev_addr); 751 if (dev == NULL) { 752 p2p_parse_free(&msg); 753 return -1; 754 } 755 756 if (rx_time == NULL) { 757 os_get_reltime(&time_now); 758 rx_time = &time_now; 759 } 760 761 /* 762 * Update the device entry only if the new peer 763 * entry is newer than the one previously stored, or if 764 * the device was previously seen as a P2P Client in a group 765 * and the new entry isn't older than a threshold. 766 */ 767 if (dev->last_seen.sec > 0 && 768 os_reltime_before(rx_time, &dev->last_seen) && 769 (!(dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT) || 770 os_reltime_expired(&dev->last_seen, rx_time, 771 P2P_DEV_GROUP_CLIENT_RESP_THRESHOLD))) { 772 p2p_dbg(p2p, 773 "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u flags=0x%x)", 774 (unsigned int) rx_time->sec, 775 (unsigned int) rx_time->usec, 776 (unsigned int) dev->last_seen.sec, 777 (unsigned int) dev->last_seen.usec, 778 dev->flags); 779 p2p_parse_free(&msg); 780 return -1; 781 } 782 783 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime)); 784 785 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY | 786 P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT); 787 788 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0) 789 os_memcpy(dev->interface_addr, addr, ETH_ALEN); 790 if (msg.ssid && 791 msg.ssid[1] <= sizeof(dev->oper_ssid) && 792 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 793 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 794 != 0)) { 795 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]); 796 dev->oper_ssid_len = msg.ssid[1]; 797 } 798 799 if (msg.adv_service_instance && msg.adv_service_instance_len) { 800 wpabuf_free(dev->info.p2ps_instance); 801 dev->info.p2ps_instance = wpabuf_alloc_copy( 802 msg.adv_service_instance, msg.adv_service_instance_len); 803 } 804 805 if (freq >= 2412 && freq <= 2484 && msg.ds_params && 806 *msg.ds_params >= 1 && *msg.ds_params <= 14) { 807 int ds_freq; 808 if (*msg.ds_params == 14) 809 ds_freq = 2484; 810 else 811 ds_freq = 2407 + *msg.ds_params * 5; 812 if (freq != ds_freq) { 813 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz", 814 freq, ds_freq); 815 freq = ds_freq; 816 } 817 } 818 819 if (dev->listen_freq && dev->listen_freq != freq && scan_res) { 820 p2p_dbg(p2p, "Update Listen frequency based on scan results (" 821 MACSTR " %d -> %d MHz (DS param %d)", 822 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq, 823 freq, msg.ds_params ? *msg.ds_params : -1); 824 } 825 if (scan_res) { 826 dev->listen_freq = freq; 827 if (msg.group_info) 828 dev->oper_freq = freq; 829 } 830 dev->info.level = level; 831 832 p2p_copy_wps_info(p2p, dev, 0, &msg); 833 834 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 835 wpabuf_free(dev->info.wps_vendor_ext[i]); 836 dev->info.wps_vendor_ext[i] = NULL; 837 } 838 839 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 840 if (msg.wps_vendor_ext[i] == NULL) 841 break; 842 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy( 843 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]); 844 if (dev->info.wps_vendor_ext[i] == NULL) 845 break; 846 } 847 848 wfd_changed = p2p_compare_wfd_info(dev, &msg); 849 850 if (msg.wfd_subelems) { 851 wpabuf_free(dev->info.wfd_subelems); 852 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 853 } 854 855 if (scan_res) { 856 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq, 857 msg.group_info, msg.group_info_len, 858 rx_time); 859 } 860 861 p2p_parse_free(&msg); 862 863 p2p_update_peer_vendor_elems(dev, ies, ies_len); 864 865 if (dev->flags & P2P_DEV_REPORTED && !wfd_changed && 866 (!msg.adv_service_instance || 867 (dev->flags & P2P_DEV_P2PS_REPORTED))) 868 return 0; 869 870 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)", 871 freq, (unsigned int) rx_time->sec, 872 (unsigned int) rx_time->usec); 873 if (dev->flags & P2P_DEV_USER_REJECTED) { 874 p2p_dbg(p2p, "Do not report rejected device"); 875 return 0; 876 } 877 878 if (dev->info.config_methods == 0 && 879 (freq == 2412 || freq == 2437 || freq == 2462)) { 880 /* 881 * If we have only seen a Beacon frame from a GO, we do not yet 882 * know what WPS config methods it supports. Since some 883 * applications use config_methods value from P2P-DEVICE-FOUND 884 * events, postpone reporting this peer until we've fully 885 * discovered its capabilities. 886 * 887 * At least for now, do this only if the peer was detected on 888 * one of the social channels since that peer can be easily be 889 * found again and there are no limitations of having to use 890 * passive scan on this channels, so this can be done through 891 * Probe Response frame that includes the config_methods 892 * information. 893 */ 894 p2p_dbg(p2p, "Do not report peer " MACSTR 895 " with unknown config methods", MAC2STR(addr)); 896 return 0; 897 } 898 899 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 900 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 901 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 902 903 if (msg.adv_service_instance) 904 dev->flags |= P2P_DEV_P2PS_REPORTED; 905 906 return 0; 907} 908 909 910static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev) 911{ 912 int i; 913 914 if (p2p->go_neg_peer == dev) { 915 /* 916 * If GO Negotiation is in progress, report that it has failed. 917 */ 918 p2p_go_neg_failed(p2p, -1); 919 } 920 if (p2p->invite_peer == dev) 921 p2p->invite_peer = NULL; 922 if (p2p->sd_peer == dev) 923 p2p->sd_peer = NULL; 924 if (p2p->pending_client_disc_go == dev) 925 p2p->pending_client_disc_go = NULL; 926 927 /* dev_lost() device, but only if it was previously dev_found() */ 928 if (dev->flags & P2P_DEV_REPORTED_ONCE) 929 p2p->cfg->dev_lost(p2p->cfg->cb_ctx, 930 dev->info.p2p_device_addr); 931 932 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 933 wpabuf_free(dev->info.wps_vendor_ext[i]); 934 dev->info.wps_vendor_ext[i] = NULL; 935 } 936 937 wpabuf_free(dev->info.wfd_subelems); 938 wpabuf_free(dev->info.vendor_elems); 939 wpabuf_free(dev->go_neg_conf); 940 wpabuf_free(dev->info.p2ps_instance); 941 942 os_free(dev); 943} 944 945 946static int p2p_get_next_prog_freq(struct p2p_data *p2p) 947{ 948 struct p2p_channels *c; 949 struct p2p_reg_class *cla; 950 size_t cl, ch; 951 int found = 0; 952 u8 reg_class; 953 u8 channel; 954 int freq; 955 956 c = &p2p->cfg->channels; 957 for (cl = 0; cl < c->reg_classes; cl++) { 958 cla = &c->reg_class[cl]; 959 if (cla->reg_class != p2p->last_prog_scan_class) 960 continue; 961 for (ch = 0; ch < cla->channels; ch++) { 962 if (cla->channel[ch] == p2p->last_prog_scan_chan) { 963 found = 1; 964 break; 965 } 966 } 967 if (found) 968 break; 969 } 970 971 if (!found) { 972 /* Start from beginning */ 973 reg_class = c->reg_class[0].reg_class; 974 channel = c->reg_class[0].channel[0]; 975 } else { 976 /* Pick the next channel */ 977 ch++; 978 if (ch == cla->channels) { 979 cl++; 980 if (cl == c->reg_classes) 981 cl = 0; 982 ch = 0; 983 } 984 reg_class = c->reg_class[cl].reg_class; 985 channel = c->reg_class[cl].channel[ch]; 986 } 987 988 freq = p2p_channel_to_freq(reg_class, channel); 989 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz", 990 reg_class, channel, freq); 991 p2p->last_prog_scan_class = reg_class; 992 p2p->last_prog_scan_chan = channel; 993 994 if (freq == 2412 || freq == 2437 || freq == 2462) 995 return 0; /* No need to add social channels */ 996 return freq; 997} 998 999 1000static void p2p_search(struct p2p_data *p2p) 1001{ 1002 int freq = 0; 1003 enum p2p_scan_type type; 1004 u16 pw_id = DEV_PW_DEFAULT; 1005 int res; 1006 1007 if (p2p->drv_in_listen) { 1008 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing"); 1009 return; 1010 } 1011 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1012 1013 if (p2p->find_type == P2P_FIND_PROGRESSIVE && 1014 (freq = p2p_get_next_prog_freq(p2p)) > 0) { 1015 type = P2P_SCAN_SOCIAL_PLUS_ONE; 1016 p2p_dbg(p2p, "Starting search (+ freq %u)", freq); 1017 } else { 1018 type = P2P_SCAN_SOCIAL; 1019 p2p_dbg(p2p, "Starting search"); 1020 } 1021 1022 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq, 1023 p2p->num_req_dev_types, p2p->req_dev_types, 1024 p2p->find_dev_id, pw_id); 1025 if (res < 0) { 1026 p2p_dbg(p2p, "Scan request schedule failed"); 1027 p2p_continue_find(p2p); 1028 } 1029} 1030 1031 1032static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx) 1033{ 1034 struct p2p_data *p2p = eloop_ctx; 1035 p2p_dbg(p2p, "Find timeout -> stop"); 1036 p2p_stop_find(p2p); 1037} 1038 1039 1040void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status) 1041{ 1042 if (status != 0) { 1043 p2p_dbg(p2p, "Scan request failed"); 1044 /* Do continue find even for the first p2p_find_scan */ 1045 p2p_continue_find(p2p); 1046 } else { 1047 p2p_dbg(p2p, "Running p2p_scan"); 1048 p2p->p2p_scan_running = 1; 1049 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 1050 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 1051 p2p, NULL); 1052 } 1053} 1054 1055 1056static int p2p_run_after_scan(struct p2p_data *p2p) 1057{ 1058 struct p2p_device *dev; 1059 enum p2p_after_scan op; 1060 1061 if (p2p->after_scan_tx) { 1062 p2p->after_scan_tx_in_progress = 1; 1063 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion"); 1064 p2p->cfg->send_action(p2p->cfg->cb_ctx, 1065 p2p->after_scan_tx->freq, 1066 p2p->after_scan_tx->dst, 1067 p2p->after_scan_tx->src, 1068 p2p->after_scan_tx->bssid, 1069 (u8 *) (p2p->after_scan_tx + 1), 1070 p2p->after_scan_tx->len, 1071 p2p->after_scan_tx->wait_time); 1072 os_free(p2p->after_scan_tx); 1073 p2p->after_scan_tx = NULL; 1074 return 1; 1075 } 1076 1077 op = p2p->start_after_scan; 1078 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1079 switch (op) { 1080 case P2P_AFTER_SCAN_NOTHING: 1081 break; 1082 case P2P_AFTER_SCAN_LISTEN: 1083 p2p_dbg(p2p, "Start previously requested Listen state"); 1084 p2p_listen(p2p, p2p->pending_listen_sec * 1000 + 1085 p2p->pending_listen_usec / 1000); 1086 return 1; 1087 case P2P_AFTER_SCAN_CONNECT: 1088 p2p_dbg(p2p, "Start previously requested connect with " MACSTR, 1089 MAC2STR(p2p->after_scan_peer)); 1090 dev = p2p_get_device(p2p, p2p->after_scan_peer); 1091 if (dev == NULL) { 1092 p2p_dbg(p2p, "Peer not known anymore"); 1093 break; 1094 } 1095 p2p_connect_send(p2p, dev); 1096 return 1; 1097 } 1098 1099 return 0; 1100} 1101 1102 1103static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx) 1104{ 1105 struct p2p_data *p2p = eloop_ctx; 1106 int running; 1107 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running); 1108 running = p2p->p2p_scan_running; 1109 /* Make sure we recover from missed scan results callback */ 1110 p2p->p2p_scan_running = 0; 1111 1112 if (running) 1113 p2p_run_after_scan(p2p); 1114} 1115 1116 1117static void p2p_free_req_dev_types(struct p2p_data *p2p) 1118{ 1119 p2p->num_req_dev_types = 0; 1120 os_free(p2p->req_dev_types); 1121 p2p->req_dev_types = NULL; 1122} 1123 1124 1125static int p2ps_gen_hash(struct p2p_data *p2p, const char *str, u8 *hash) 1126{ 1127 u8 buf[SHA256_MAC_LEN]; 1128 char str_buf[256]; 1129 const u8 *adv_array; 1130 size_t i, adv_len; 1131 1132 if (!str || !hash) 1133 return 0; 1134 1135 if (!str[0]) { 1136 os_memcpy(hash, p2p->wild_card_hash, P2PS_HASH_LEN); 1137 return 1; 1138 } 1139 1140 adv_array = (u8 *) str_buf; 1141 adv_len = os_strlen(str); 1142 if (adv_len >= sizeof(str_buf)) 1143 return 0; 1144 1145 for (i = 0; str[i] && i < adv_len; i++) { 1146 if (str[i] >= 'A' && str[i] <= 'Z') 1147 str_buf[i] = str[i] - 'A' + 'a'; 1148 else 1149 str_buf[i] = str[i]; 1150 } 1151 1152 if (sha256_vector(1, &adv_array, &adv_len, buf)) 1153 return 0; 1154 1155 os_memcpy(hash, buf, P2PS_HASH_LEN); 1156 return 1; 1157} 1158 1159 1160int p2p_find(struct p2p_data *p2p, unsigned int timeout, 1161 enum p2p_discovery_type type, 1162 unsigned int num_req_dev_types, const u8 *req_dev_types, 1163 const u8 *dev_id, unsigned int search_delay, 1164 u8 seek_count, const char **seek, int freq) 1165{ 1166 int res; 1167 1168 p2p_dbg(p2p, "Starting find (type=%d)", type); 1169 os_get_reltime(&p2p->find_start); 1170 if (p2p->p2p_scan_running) { 1171 p2p_dbg(p2p, "p2p_scan is already running"); 1172 } 1173 1174 p2p_free_req_dev_types(p2p); 1175 if (req_dev_types && num_req_dev_types) { 1176 p2p->req_dev_types = os_malloc(num_req_dev_types * 1177 WPS_DEV_TYPE_LEN); 1178 if (p2p->req_dev_types == NULL) 1179 return -1; 1180 os_memcpy(p2p->req_dev_types, req_dev_types, 1181 num_req_dev_types * WPS_DEV_TYPE_LEN); 1182 p2p->num_req_dev_types = num_req_dev_types; 1183 } 1184 1185 if (dev_id) { 1186 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN); 1187 p2p->find_dev_id = p2p->find_dev_id_buf; 1188 } else 1189 p2p->find_dev_id = NULL; 1190 1191 if (seek_count == 0 || !seek) { 1192 /* Not an ASP search */ 1193 p2p->p2ps_seek = 0; 1194 } else if (seek_count == 1 && seek && (!seek[0] || !seek[0][0])) { 1195 /* 1196 * An empty seek string means no hash values, but still an ASP 1197 * search. 1198 */ 1199 p2p_dbg(p2p, "ASP search"); 1200 p2p->p2ps_seek_count = 0; 1201 p2p->p2ps_seek = 1; 1202 } else if (seek && seek_count <= P2P_MAX_QUERY_HASH) { 1203 u8 buf[P2PS_HASH_LEN]; 1204 int i, count = 0; 1205 1206 for (i = 0; i < seek_count; i++) { 1207 if (!p2ps_gen_hash(p2p, seek[i], buf)) 1208 continue; 1209 1210 p2p_dbg(p2p, "Seek service %s hash " MACSTR, 1211 seek[i], MAC2STR(buf)); 1212 os_memcpy(&p2p->p2ps_seek_hash[count * P2PS_HASH_LEN], 1213 buf, P2PS_HASH_LEN); 1214 count++; 1215 } 1216 1217 p2p->p2ps_seek_count = count; 1218 p2p->p2ps_seek = 1; 1219 } else { 1220 p2p->p2ps_seek_count = 0; 1221 p2p->p2ps_seek = 1; 1222 } 1223 1224 /* Special case to perform wildcard search */ 1225 if (p2p->p2ps_seek_count == 0 && p2p->p2ps_seek) { 1226 p2p->p2ps_seek_count = 1; 1227 os_memcpy(&p2p->p2ps_seek_hash, p2p->wild_card_hash, 1228 P2PS_HASH_LEN); 1229 } 1230 1231 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1232 p2p_clear_timeout(p2p); 1233 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1234 p2p->find_type = type; 1235 p2p_device_clear_reported(p2p); 1236 p2p_set_state(p2p, P2P_SEARCH); 1237 p2p->search_delay = search_delay; 1238 p2p->in_search_delay = 0; 1239 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1240 p2p->last_p2p_find_timeout = timeout; 1241 if (timeout) 1242 eloop_register_timeout(timeout, 0, p2p_find_timeout, 1243 p2p, NULL); 1244 switch (type) { 1245 case P2P_FIND_START_WITH_FULL: 1246 if (freq > 0) { 1247 /* 1248 * Start with the specified channel and then move to 1249 * social channels only scans. 1250 */ 1251 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, 1252 P2P_SCAN_SPECIFIC, freq, 1253 p2p->num_req_dev_types, 1254 p2p->req_dev_types, dev_id, 1255 DEV_PW_DEFAULT); 1256 break; 1257 } 1258 /* fall through */ 1259 case P2P_FIND_PROGRESSIVE: 1260 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0, 1261 p2p->num_req_dev_types, 1262 p2p->req_dev_types, dev_id, 1263 DEV_PW_DEFAULT); 1264 break; 1265 case P2P_FIND_ONLY_SOCIAL: 1266 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0, 1267 p2p->num_req_dev_types, 1268 p2p->req_dev_types, dev_id, 1269 DEV_PW_DEFAULT); 1270 break; 1271 default: 1272 return -1; 1273 } 1274 1275 if (res != 0 && p2p->p2p_scan_running) { 1276 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running"); 1277 /* wait for the previous p2p_scan to complete */ 1278 res = 0; /* do not report failure */ 1279 } else if (res != 0) { 1280 p2p_dbg(p2p, "Failed to start p2p_scan"); 1281 p2p_set_state(p2p, P2P_IDLE); 1282 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1283 } 1284 1285 return res; 1286} 1287 1288 1289void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq) 1290{ 1291 p2p_dbg(p2p, "Stopping find"); 1292 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1293 p2p_clear_timeout(p2p); 1294 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND) 1295 p2p->cfg->find_stopped(p2p->cfg->cb_ctx); 1296 1297 p2p->p2ps_seek_count = 0; 1298 1299 p2p_set_state(p2p, P2P_IDLE); 1300 p2p_free_req_dev_types(p2p); 1301 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1302 if (p2p->go_neg_peer) 1303 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1304 p2p->go_neg_peer = NULL; 1305 p2p->sd_peer = NULL; 1306 p2p->invite_peer = NULL; 1307 p2p_stop_listen_for_freq(p2p, freq); 1308 p2p->send_action_in_progress = 0; 1309} 1310 1311 1312void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq) 1313{ 1314 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) { 1315 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response"); 1316 return; 1317 } 1318 if (p2p->in_listen) { 1319 p2p->in_listen = 0; 1320 p2p_clear_timeout(p2p); 1321 } 1322 if (p2p->drv_in_listen) { 1323 /* 1324 * The driver may not deliver callback to p2p_listen_end() 1325 * when the operation gets canceled, so clear the internal 1326 * variable that is tracking driver state. 1327 */ 1328 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen); 1329 p2p->drv_in_listen = 0; 1330 } 1331 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1332} 1333 1334 1335void p2p_stop_listen(struct p2p_data *p2p) 1336{ 1337 if (p2p->state != P2P_LISTEN_ONLY) { 1338 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state."); 1339 return; 1340 } 1341 1342 p2p_stop_listen_for_freq(p2p, 0); 1343 p2p_set_state(p2p, P2P_IDLE); 1344} 1345 1346 1347void p2p_stop_find(struct p2p_data *p2p) 1348{ 1349 p2p->pending_listen_freq = 0; 1350 p2p_stop_find_for_freq(p2p, 0); 1351} 1352 1353 1354static int p2p_prepare_channel_pref(struct p2p_data *p2p, 1355 unsigned int force_freq, 1356 unsigned int pref_freq, int go) 1357{ 1358 u8 op_class, op_channel; 1359 unsigned int freq = force_freq ? force_freq : pref_freq; 1360 1361 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d", 1362 force_freq, pref_freq, go); 1363 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) { 1364 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq); 1365 return -1; 1366 } 1367 1368 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) && 1369 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class, 1370 op_channel))) { 1371 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P", 1372 freq, op_class, op_channel); 1373 return -1; 1374 } 1375 1376 p2p->op_reg_class = op_class; 1377 p2p->op_channel = op_channel; 1378 1379 if (force_freq) { 1380 p2p->channels.reg_classes = 1; 1381 p2p->channels.reg_class[0].channels = 1; 1382 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 1383 p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 1384 } else { 1385 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1386 sizeof(struct p2p_channels)); 1387 } 1388 1389 return 0; 1390} 1391 1392 1393static void p2p_prepare_channel_best(struct p2p_data *p2p) 1394{ 1395 u8 op_class, op_channel; 1396 const int op_classes_5ghz[] = { 124, 125, 115, 0 }; 1397 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 }; 1398 const int op_classes_vht[] = { 128, 0 }; 1399 1400 p2p_dbg(p2p, "Prepare channel best"); 1401 1402 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 && 1403 p2p_supported_freq(p2p, p2p->best_freq_overall) && 1404 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel) 1405 == 0) { 1406 p2p_dbg(p2p, "Select best overall channel as operating channel preference"); 1407 p2p->op_reg_class = op_class; 1408 p2p->op_channel = op_channel; 1409 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 && 1410 p2p_supported_freq(p2p, p2p->best_freq_5) && 1411 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel) 1412 == 0) { 1413 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference"); 1414 p2p->op_reg_class = op_class; 1415 p2p->op_channel = op_channel; 1416 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 && 1417 p2p_supported_freq(p2p, p2p->best_freq_24) && 1418 p2p_freq_to_channel(p2p->best_freq_24, &op_class, 1419 &op_channel) == 0) { 1420 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference"); 1421 p2p->op_reg_class = op_class; 1422 p2p->op_channel = op_channel; 1423 } else if (p2p->cfg->num_pref_chan > 0 && 1424 p2p_channels_includes(&p2p->cfg->channels, 1425 p2p->cfg->pref_chan[0].op_class, 1426 p2p->cfg->pref_chan[0].chan)) { 1427 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference"); 1428 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class; 1429 p2p->op_channel = p2p->cfg->pref_chan[0].chan; 1430 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht, 1431 &p2p->op_reg_class, &p2p->op_channel) == 1432 0) { 1433 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference", 1434 p2p->op_reg_class, p2p->op_channel); 1435 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40, 1436 &p2p->op_reg_class, &p2p->op_channel) == 1437 0) { 1438 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference", 1439 p2p->op_reg_class, p2p->op_channel); 1440 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz, 1441 &p2p->op_reg_class, &p2p->op_channel) == 1442 0) { 1443 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference", 1444 p2p->op_reg_class, p2p->op_channel); 1445 } else if (p2p_channels_includes(&p2p->cfg->channels, 1446 p2p->cfg->op_reg_class, 1447 p2p->cfg->op_channel)) { 1448 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference"); 1449 p2p->op_reg_class = p2p->cfg->op_reg_class; 1450 p2p->op_channel = p2p->cfg->op_channel; 1451 } else if (p2p_channel_random_social(&p2p->cfg->channels, 1452 &p2p->op_reg_class, 1453 &p2p->op_channel) == 0) { 1454 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference", 1455 p2p->op_reg_class, p2p->op_channel); 1456 } else { 1457 /* Select any random available channel from the first available 1458 * operating class */ 1459 p2p_channel_select(&p2p->cfg->channels, NULL, 1460 &p2p->op_reg_class, 1461 &p2p->op_channel); 1462 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference", 1463 p2p->op_channel, p2p->op_reg_class); 1464 } 1465 1466 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1467 sizeof(struct p2p_channels)); 1468} 1469 1470 1471/** 1472 * p2p_prepare_channel - Select operating channel for GO Negotiation 1473 * @p2p: P2P module context from p2p_init() 1474 * @dev: Selected peer device 1475 * @force_freq: Forced frequency in MHz or 0 if not forced 1476 * @pref_freq: Preferred frequency in MHz or 0 if no preference 1477 * @go: Whether the local end will be forced to be GO 1478 * Returns: 0 on success, -1 on failure (channel not supported for P2P) 1479 * 1480 * This function is used to do initial operating channel selection for GO 1481 * Negotiation prior to having received peer information. The selected channel 1482 * may be further optimized in p2p_reselect_channel() once the peer information 1483 * is available. 1484 */ 1485int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev, 1486 unsigned int force_freq, unsigned int pref_freq, int go) 1487{ 1488 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d", 1489 force_freq, pref_freq, go); 1490 if (force_freq || pref_freq) { 1491 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) < 1492 0) 1493 return -1; 1494 } else { 1495 p2p_prepare_channel_best(p2p); 1496 } 1497 p2p_channels_dump(p2p, "prepared channels", &p2p->channels); 1498 if (go) 1499 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq); 1500 else if (!force_freq) 1501 p2p_channels_union_inplace(&p2p->channels, 1502 &p2p->cfg->cli_channels); 1503 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels); 1504 1505 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s", 1506 p2p->op_reg_class, p2p->op_channel, 1507 force_freq ? " (forced)" : ""); 1508 1509 if (force_freq) 1510 dev->flags |= P2P_DEV_FORCE_FREQ; 1511 else 1512 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1513 1514 return 0; 1515} 1516 1517 1518static void p2p_set_dev_persistent(struct p2p_device *dev, 1519 int persistent_group) 1520{ 1521 switch (persistent_group) { 1522 case 0: 1523 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP | 1524 P2P_DEV_PREFER_PERSISTENT_RECONN); 1525 break; 1526 case 1: 1527 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP; 1528 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN; 1529 break; 1530 case 2: 1531 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP | 1532 P2P_DEV_PREFER_PERSISTENT_RECONN; 1533 break; 1534 } 1535} 1536 1537 1538int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr, 1539 enum p2p_wps_method wps_method, 1540 int go_intent, const u8 *own_interface_addr, 1541 unsigned int force_freq, int persistent_group, 1542 const u8 *force_ssid, size_t force_ssid_len, 1543 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id) 1544{ 1545 struct p2p_device *dev; 1546 1547 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR 1548 " GO Intent=%d Intended Interface Address=" MACSTR 1549 " wps_method=%d persistent_group=%d pd_before_go_neg=%d " 1550 "oob_pw_id=%u", 1551 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1552 wps_method, persistent_group, pd_before_go_neg, oob_pw_id); 1553 1554 dev = p2p_get_device(p2p, peer_addr); 1555 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 1556 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR, 1557 MAC2STR(peer_addr)); 1558 return -1; 1559 } 1560 1561 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, 1562 go_intent == 15) < 0) 1563 return -1; 1564 1565 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 1566 if (!(dev->info.dev_capab & 1567 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 1568 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1569 " that is in a group and is not discoverable", 1570 MAC2STR(peer_addr)); 1571 return -1; 1572 } 1573 if (dev->oper_freq <= 0) { 1574 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1575 " with incomplete information", 1576 MAC2STR(peer_addr)); 1577 return -1; 1578 } 1579 1580 /* 1581 * First, try to connect directly. If the peer does not 1582 * acknowledge frames, assume it is sleeping and use device 1583 * discoverability via the GO at that point. 1584 */ 1585 } 1586 1587 p2p->ssid_set = 0; 1588 if (force_ssid) { 1589 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1590 force_ssid, force_ssid_len); 1591 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1592 p2p->ssid_len = force_ssid_len; 1593 p2p->ssid_set = 1; 1594 } 1595 1596 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1597 dev->flags &= ~P2P_DEV_USER_REJECTED; 1598 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 1599 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1600 if (pd_before_go_neg) 1601 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG; 1602 else { 1603 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG; 1604 /* 1605 * Assign dialog token and tie breaker here to use the same 1606 * values in each retry within the same GO Negotiation exchange. 1607 */ 1608 dev->dialog_token++; 1609 if (dev->dialog_token == 0) 1610 dev->dialog_token = 1; 1611 dev->tie_breaker = p2p->next_tie_breaker; 1612 p2p->next_tie_breaker = !p2p->next_tie_breaker; 1613 } 1614 dev->connect_reqs = 0; 1615 dev->go_neg_req_sent = 0; 1616 dev->go_state = UNKNOWN_GO; 1617 p2p_set_dev_persistent(dev, persistent_group); 1618 p2p->go_intent = go_intent; 1619 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1620 1621 if (p2p->state != P2P_IDLE) 1622 p2p_stop_find(p2p); 1623 1624 if (p2p->after_scan_tx) { 1625 /* 1626 * We need to drop the pending frame to avoid issues with the 1627 * new GO Negotiation, e.g., when the pending frame was from a 1628 * previous attempt at starting a GO Negotiation. 1629 */ 1630 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion"); 1631 os_free(p2p->after_scan_tx); 1632 p2p->after_scan_tx = NULL; 1633 } 1634 1635 dev->wps_method = wps_method; 1636 dev->oob_pw_id = oob_pw_id; 1637 dev->status = P2P_SC_SUCCESS; 1638 1639 if (p2p->p2p_scan_running) { 1640 p2p_dbg(p2p, "p2p_scan running - delay connect send"); 1641 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT; 1642 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN); 1643 return 0; 1644 } 1645 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1646 1647 return p2p_connect_send(p2p, dev); 1648} 1649 1650 1651int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr, 1652 enum p2p_wps_method wps_method, 1653 int go_intent, const u8 *own_interface_addr, 1654 unsigned int force_freq, int persistent_group, 1655 const u8 *force_ssid, size_t force_ssid_len, 1656 unsigned int pref_freq, u16 oob_pw_id) 1657{ 1658 struct p2p_device *dev; 1659 1660 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR 1661 " GO Intent=%d Intended Interface Address=" MACSTR 1662 " wps_method=%d persistent_group=%d oob_pw_id=%u", 1663 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1664 wps_method, persistent_group, oob_pw_id); 1665 1666 dev = p2p_get_device(p2p, peer_addr); 1667 if (dev == NULL) { 1668 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR, 1669 MAC2STR(peer_addr)); 1670 return -1; 1671 } 1672 1673 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent == 1674 15) < 0) 1675 return -1; 1676 1677 p2p->ssid_set = 0; 1678 if (force_ssid) { 1679 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1680 force_ssid, force_ssid_len); 1681 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1682 p2p->ssid_len = force_ssid_len; 1683 p2p->ssid_set = 1; 1684 } 1685 1686 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1687 dev->flags &= ~P2P_DEV_USER_REJECTED; 1688 dev->go_neg_req_sent = 0; 1689 dev->go_state = UNKNOWN_GO; 1690 p2p_set_dev_persistent(dev, persistent_group); 1691 p2p->go_intent = go_intent; 1692 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1693 1694 dev->wps_method = wps_method; 1695 dev->oob_pw_id = oob_pw_id; 1696 dev->status = P2P_SC_SUCCESS; 1697 1698 return 0; 1699} 1700 1701 1702void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr, 1703 struct p2p_device *dev, struct p2p_message *msg) 1704{ 1705 os_get_reltime(&dev->last_seen); 1706 1707 p2p_copy_wps_info(p2p, dev, 0, msg); 1708 1709 if (msg->listen_channel) { 1710 int freq; 1711 freq = p2p_channel_to_freq(msg->listen_channel[3], 1712 msg->listen_channel[4]); 1713 if (freq < 0) { 1714 p2p_dbg(p2p, "Unknown peer Listen channel: " 1715 "country=%c%c(0x%02x) reg_class=%u channel=%u", 1716 msg->listen_channel[0], 1717 msg->listen_channel[1], 1718 msg->listen_channel[2], 1719 msg->listen_channel[3], 1720 msg->listen_channel[4]); 1721 } else { 1722 p2p_dbg(p2p, "Update peer " MACSTR 1723 " Listen channel: %u -> %u MHz", 1724 MAC2STR(dev->info.p2p_device_addr), 1725 dev->listen_freq, freq); 1726 dev->listen_freq = freq; 1727 } 1728 } 1729 1730 if (msg->wfd_subelems) { 1731 wpabuf_free(dev->info.wfd_subelems); 1732 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems); 1733 } 1734 1735 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 1736 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 1737 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request"); 1738 } else { 1739 p2p_dbg(p2p, "Created device entry based on GO Neg Req: " 1740 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' " 1741 "listen_freq=%d", 1742 MAC2STR(dev->info.p2p_device_addr), 1743 dev->info.dev_capab, dev->info.group_capab, 1744 dev->info.device_name, dev->listen_freq); 1745 } 1746 1747 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY; 1748 1749 if (dev->flags & P2P_DEV_USER_REJECTED) { 1750 p2p_dbg(p2p, "Do not report rejected device"); 1751 return; 1752 } 1753 1754 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 1755 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 1756 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 1757} 1758 1759 1760void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len) 1761{ 1762 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 1763 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2); 1764 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2], 1765 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len); 1766 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len; 1767} 1768 1769 1770int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params) 1771{ 1772 if (p2p->ssid_set) { 1773 os_memcpy(params->ssid, p2p->ssid, p2p->ssid_len); 1774 params->ssid_len = p2p->ssid_len; 1775 } else { 1776 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len); 1777 } 1778 p2p->ssid_set = 0; 1779 1780 p2p_random(params->passphrase, p2p->cfg->passphrase_len); 1781 return 0; 1782} 1783 1784 1785void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer) 1786{ 1787 struct p2p_go_neg_results res; 1788 int go = peer->go_state == LOCAL_GO; 1789 struct p2p_channels intersection; 1790 1791 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)", 1792 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer"); 1793 1794 os_memset(&res, 0, sizeof(res)); 1795 res.role_go = go; 1796 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 1797 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 1798 res.wps_method = peer->wps_method; 1799 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 1800 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 1801 res.persistent_group = 2; 1802 else 1803 res.persistent_group = 1; 1804 } 1805 1806 if (go) { 1807 /* Setup AP mode for WPS provisioning */ 1808 res.freq = p2p_channel_to_freq(p2p->op_reg_class, 1809 p2p->op_channel); 1810 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1811 res.ssid_len = p2p->ssid_len; 1812 p2p_random(res.passphrase, p2p->cfg->passphrase_len); 1813 } else { 1814 res.freq = peer->oper_freq; 1815 if (p2p->ssid_len) { 1816 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1817 res.ssid_len = p2p->ssid_len; 1818 } 1819 } 1820 1821 p2p_channels_dump(p2p, "own channels", &p2p->channels); 1822 p2p_channels_dump(p2p, "peer channels", &peer->channels); 1823 p2p_channels_intersect(&p2p->channels, &peer->channels, 1824 &intersection); 1825 if (go) { 1826 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq); 1827 p2p_channels_dump(p2p, "intersection after no-GO removal", 1828 &intersection); 1829 } 1830 1831 p2p_channels_to_freqs(&intersection, res.freq_list, 1832 P2P_MAX_CHANNELS); 1833 1834 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout; 1835 1836 p2p_clear_timeout(p2p); 1837 p2p->ssid_set = 0; 1838 peer->go_neg_req_sent = 0; 1839 peer->wps_method = WPS_NOT_READY; 1840 peer->oob_pw_id = 0; 1841 wpabuf_free(peer->go_neg_conf); 1842 peer->go_neg_conf = NULL; 1843 1844 p2p_set_state(p2p, P2P_PROVISIONING); 1845 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 1846} 1847 1848 1849static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa, 1850 const u8 *data, size_t len, int rx_freq) 1851{ 1852 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa)); 1853 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len); 1854 1855 if (len < 1) 1856 return; 1857 1858 switch (data[0]) { 1859 case P2P_GO_NEG_REQ: 1860 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq); 1861 break; 1862 case P2P_GO_NEG_RESP: 1863 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq); 1864 break; 1865 case P2P_GO_NEG_CONF: 1866 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1); 1867 break; 1868 case P2P_INVITATION_REQ: 1869 p2p_process_invitation_req(p2p, sa, data + 1, len - 1, 1870 rx_freq); 1871 break; 1872 case P2P_INVITATION_RESP: 1873 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1); 1874 break; 1875 case P2P_PROV_DISC_REQ: 1876 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1877 break; 1878 case P2P_PROV_DISC_RESP: 1879 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1); 1880 break; 1881 case P2P_DEV_DISC_REQ: 1882 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1883 break; 1884 case P2P_DEV_DISC_RESP: 1885 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1); 1886 break; 1887 default: 1888 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d", 1889 data[0]); 1890 break; 1891 } 1892} 1893 1894 1895static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, 1896 const u8 *sa, const u8 *bssid, const u8 *data, 1897 size_t len, int freq) 1898{ 1899 if (len < 1) 1900 return; 1901 1902 switch (data[0]) { 1903 case WLAN_PA_VENDOR_SPECIFIC: 1904 data++; 1905 len--; 1906 if (len < 4) 1907 return; 1908 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1909 return; 1910 1911 data += 4; 1912 len -= 4; 1913 1914 p2p_rx_p2p_action(p2p, sa, data, len, freq); 1915 break; 1916 case WLAN_PA_GAS_INITIAL_REQ: 1917 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq); 1918 break; 1919 case WLAN_PA_GAS_INITIAL_RESP: 1920 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq); 1921 break; 1922 case WLAN_PA_GAS_COMEBACK_REQ: 1923 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq); 1924 break; 1925 case WLAN_PA_GAS_COMEBACK_RESP: 1926 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq); 1927 break; 1928 } 1929} 1930 1931 1932void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa, 1933 const u8 *bssid, u8 category, 1934 const u8 *data, size_t len, int freq) 1935{ 1936 if (category == WLAN_ACTION_PUBLIC) { 1937 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq); 1938 return; 1939 } 1940 1941 if (category != WLAN_ACTION_VENDOR_SPECIFIC) 1942 return; 1943 1944 if (len < 4) 1945 return; 1946 1947 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1948 return; 1949 data += 4; 1950 len -= 4; 1951 1952 /* P2P action frame */ 1953 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa)); 1954 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len); 1955 1956 if (len < 1) 1957 return; 1958 switch (data[0]) { 1959 case P2P_NOA: 1960 p2p_dbg(p2p, "Received P2P Action - Notice of Absence"); 1961 /* TODO */ 1962 break; 1963 case P2P_PRESENCE_REQ: 1964 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq); 1965 break; 1966 case P2P_PRESENCE_RESP: 1967 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1); 1968 break; 1969 case P2P_GO_DISC_REQ: 1970 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq); 1971 break; 1972 default: 1973 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]); 1974 break; 1975 } 1976} 1977 1978 1979static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx) 1980{ 1981 struct p2p_data *p2p = eloop_ctx; 1982 if (p2p->go_neg_peer == NULL) 1983 return; 1984 if (p2p->pending_listen_freq) { 1985 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start"); 1986 p2p->pending_listen_freq = 0; 1987 } 1988 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1989 p2p->go_neg_peer->status = P2P_SC_SUCCESS; 1990 /* 1991 * Set new timeout to make sure a previously set one does not expire 1992 * too quickly while waiting for the GO Negotiation to complete. 1993 */ 1994 p2p_set_timeout(p2p, 0, 500000); 1995 p2p_connect_send(p2p, p2p->go_neg_peer); 1996} 1997 1998 1999static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx) 2000{ 2001 struct p2p_data *p2p = eloop_ctx; 2002 if (p2p->invite_peer == NULL) 2003 return; 2004 if (p2p->pending_listen_freq) { 2005 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start"); 2006 p2p->pending_listen_freq = 0; 2007 } 2008 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 2009 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr, 2010 p2p->invite_dev_pw_id); 2011} 2012 2013 2014static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr, 2015 const u8 *ie, size_t ie_len) 2016{ 2017 struct p2p_message msg; 2018 struct p2p_device *dev; 2019 2020 os_memset(&msg, 0, sizeof(msg)); 2021 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL) 2022 { 2023 p2p_parse_free(&msg); 2024 return; /* not a P2P probe */ 2025 } 2026 2027 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 2028 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 2029 != 0) { 2030 /* The Probe Request is not part of P2P Device Discovery. It is 2031 * not known whether the source address of the frame is the P2P 2032 * Device Address or P2P Interface Address. Do not add a new 2033 * peer entry based on this frames. 2034 */ 2035 p2p_parse_free(&msg); 2036 return; 2037 } 2038 2039 dev = p2p_get_device(p2p, addr); 2040 if (dev) { 2041 if (dev->country[0] == 0 && msg.listen_channel) 2042 os_memcpy(dev->country, msg.listen_channel, 3); 2043 os_get_reltime(&dev->last_seen); 2044 p2p_parse_free(&msg); 2045 return; /* already known */ 2046 } 2047 2048 dev = p2p_create_device(p2p, addr); 2049 if (dev == NULL) { 2050 p2p_parse_free(&msg); 2051 return; 2052 } 2053 2054 os_get_reltime(&dev->last_seen); 2055 dev->flags |= P2P_DEV_PROBE_REQ_ONLY; 2056 2057 if (msg.listen_channel) { 2058 os_memcpy(dev->country, msg.listen_channel, 3); 2059 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3], 2060 msg.listen_channel[4]); 2061 } 2062 2063 p2p_copy_wps_info(p2p, dev, 1, &msg); 2064 2065 if (msg.wfd_subelems) { 2066 wpabuf_free(dev->info.wfd_subelems); 2067 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 2068 } 2069 2070 p2p_parse_free(&msg); 2071 2072 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR 2073 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d", 2074 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab, 2075 dev->info.group_capab, dev->info.device_name, 2076 dev->listen_freq); 2077} 2078 2079 2080struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p, 2081 const u8 *addr, 2082 struct p2p_message *msg) 2083{ 2084 struct p2p_device *dev; 2085 2086 dev = p2p_get_device(p2p, addr); 2087 if (dev) { 2088 os_get_reltime(&dev->last_seen); 2089 return dev; /* already known */ 2090 } 2091 2092 dev = p2p_create_device(p2p, addr); 2093 if (dev == NULL) 2094 return NULL; 2095 2096 p2p_add_dev_info(p2p, addr, dev, msg); 2097 2098 return dev; 2099} 2100 2101 2102static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type) 2103{ 2104 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0) 2105 return 1; 2106 if (os_memcmp(dev_type, req_dev_type, 2) == 0 && 2107 WPA_GET_BE32(&req_dev_type[2]) == 0 && 2108 WPA_GET_BE16(&req_dev_type[6]) == 0) 2109 return 1; /* Category match with wildcard OUI/sub-category */ 2110 return 0; 2111} 2112 2113 2114int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[], 2115 size_t num_req_dev_type) 2116{ 2117 size_t i; 2118 for (i = 0; i < num_req_dev_type; i++) { 2119 if (dev_type_match(dev_type, req_dev_type[i])) 2120 return 1; 2121 } 2122 return 0; 2123} 2124 2125 2126/** 2127 * p2p_match_dev_type - Match local device type with requested type 2128 * @p2p: P2P module context from p2p_init() 2129 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) 2130 * Returns: 1 on match, 0 on mismatch 2131 * 2132 * This function can be used to match the Requested Device Type attribute in 2133 * WPS IE with the local device types for deciding whether to reply to a Probe 2134 * Request frame. 2135 */ 2136int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps) 2137{ 2138 struct wps_parse_attr attr; 2139 size_t i; 2140 2141 if (wps_parse_msg(wps, &attr)) 2142 return 1; /* assume no Requested Device Type attributes */ 2143 2144 if (attr.num_req_dev_type == 0) 2145 return 1; /* no Requested Device Type attributes -> match */ 2146 2147 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type, 2148 attr.num_req_dev_type)) 2149 return 1; /* Own Primary Device Type matches */ 2150 2151 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) { 2152 if (dev_type_list_match(p2p->cfg->sec_dev_type[i], 2153 attr.req_dev_type, 2154 attr.num_req_dev_type)) 2155 return 1; /* Own Secondary Device Type matches */ 2156 } 2157 2158 /* No matching device type found */ 2159 return 0; 2160} 2161 2162 2163struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p, 2164 const u8 *query_hash, 2165 u8 query_count) 2166{ 2167 struct wpabuf *buf; 2168 u8 *len; 2169 int pw_id = -1; 2170 size_t extra = 0; 2171 2172#ifdef CONFIG_WIFI_DISPLAY 2173 if (p2p->wfd_ie_probe_resp) 2174 extra = wpabuf_len(p2p->wfd_ie_probe_resp); 2175#endif /* CONFIG_WIFI_DISPLAY */ 2176 2177 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]) 2178 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]); 2179 2180 if (query_count) 2181 extra += MAX_SVC_ADV_IE_LEN; 2182 2183 buf = wpabuf_alloc(1000 + extra); 2184 if (buf == NULL) 2185 return NULL; 2186 2187 if (p2p->go_neg_peer) { 2188 /* Advertise immediate availability of WPS credential */ 2189 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method); 2190 } 2191 2192 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) { 2193 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response"); 2194 wpabuf_free(buf); 2195 return NULL; 2196 } 2197 2198#ifdef CONFIG_WIFI_DISPLAY 2199 if (p2p->wfd_ie_probe_resp) 2200 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp); 2201#endif /* CONFIG_WIFI_DISPLAY */ 2202 2203 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]) 2204 wpabuf_put_buf(buf, 2205 p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]); 2206 2207 /* P2P IE */ 2208 len = p2p_buf_add_ie_hdr(buf); 2209 p2p_buf_add_capability(buf, p2p->dev_capab & 2210 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2211 if (p2p->ext_listen_interval) 2212 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 2213 p2p->ext_listen_interval); 2214 p2p_buf_add_device_info(buf, p2p, NULL); 2215 p2p_buf_update_ie_hdr(buf, len); 2216 2217 if (query_count) { 2218 p2p_buf_add_service_instance(buf, p2p, query_count, query_hash, 2219 p2p->p2ps_adv_list); 2220 } 2221 2222 return buf; 2223} 2224 2225 2226static int p2p_service_find_asp(struct p2p_data *p2p, const u8 *hash) 2227{ 2228 struct p2ps_advertisement *adv_data; 2229 int any_wfa; 2230 2231 p2p_dbg(p2p, "ASP find - ASP list: %p", p2p->p2ps_adv_list); 2232 2233 /* Wildcard org.wi-fi.wfds matches any WFA spec defined service */ 2234 any_wfa = os_memcmp(hash, p2p->wild_card_hash, P2PS_HASH_LEN) == 0; 2235 2236 adv_data = p2p->p2ps_adv_list; 2237 while (adv_data) { 2238 if (os_memcmp(hash, adv_data->hash, P2PS_HASH_LEN) == 0) 2239 return 1; /* exact hash match */ 2240 if (any_wfa && 2241 os_strncmp(adv_data->svc_name, P2PS_WILD_HASH_STR, 2242 os_strlen(P2PS_WILD_HASH_STR)) == 0) 2243 return 1; /* WFA service match */ 2244 adv_data = adv_data->next; 2245 } 2246 2247 return 0; 2248} 2249 2250 2251static enum p2p_probe_req_status 2252p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2253 const u8 *bssid, const u8 *ie, size_t ie_len, 2254 unsigned int rx_freq) 2255{ 2256 struct ieee802_11_elems elems; 2257 struct wpabuf *buf; 2258 struct ieee80211_mgmt *resp; 2259 struct p2p_message msg; 2260 struct wpabuf *ies; 2261 u8 channel, op_class; 2262 2263 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) == 2264 ParseFailed) { 2265 /* Ignore invalid Probe Request frames */ 2266 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it"); 2267 return P2P_PREQ_MALFORMED; 2268 } 2269 2270 if (elems.p2p == NULL) { 2271 /* not a P2P probe - ignore it */ 2272 p2p_dbg(p2p, "Not a P2P probe - ignore it"); 2273 return P2P_PREQ_NOT_P2P; 2274 } 2275 2276 if (dst && !is_broadcast_ether_addr(dst) && 2277 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2278 /* Not sent to the broadcast address or our P2P Device Address 2279 */ 2280 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it", 2281 MAC2STR(dst)); 2282 return P2P_PREQ_NOT_PROCESSED; 2283 } 2284 2285 if (bssid && !is_broadcast_ether_addr(bssid)) { 2286 /* Not sent to the Wildcard BSSID */ 2287 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it", 2288 MAC2STR(bssid)); 2289 return P2P_PREQ_NOT_PROCESSED; 2290 } 2291 2292 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN || 2293 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) != 2294 0) { 2295 /* not using P2P Wildcard SSID - ignore */ 2296 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it"); 2297 return P2P_PREQ_NOT_PROCESSED; 2298 } 2299 2300 if (supp_rates_11b_only(&elems)) { 2301 /* Indicates support for 11b rates only */ 2302 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it"); 2303 return P2P_PREQ_NOT_P2P; 2304 } 2305 2306 os_memset(&msg, 0, sizeof(msg)); 2307 if (p2p_parse_ies(ie, ie_len, &msg) < 0) { 2308 /* Could not parse P2P attributes */ 2309 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it"); 2310 return P2P_PREQ_NOT_P2P; 2311 } 2312 2313 if (msg.service_hash && msg.service_hash_count) { 2314 const u8 *hash = msg.service_hash; 2315 u8 i; 2316 int p2ps_svc_found = 0; 2317 2318 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", 2319 p2p->in_listen, p2p->drv_in_listen, rx_freq, 2320 p2p->cfg->channel, p2p->pending_listen_freq); 2321 2322 if (!p2p->in_listen && !p2p->drv_in_listen && 2323 p2p->pending_listen_freq && rx_freq && 2324 rx_freq != p2p->pending_listen_freq) { 2325 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", 2326 rx_freq, p2p->pending_listen_freq); 2327 p2p_parse_free(&msg); 2328 return P2P_PREQ_NOT_LISTEN; 2329 } 2330 2331 for (i = 0; i < msg.service_hash_count; i++) { 2332 if (p2p_service_find_asp(p2p, hash)) { 2333 p2p_dbg(p2p, "Service Hash match found: " 2334 MACSTR, MAC2STR(hash)); 2335 p2ps_svc_found = 1; 2336 break; 2337 } 2338 hash += P2PS_HASH_LEN; 2339 } 2340 2341 /* Probed hash unknown */ 2342 if (!p2ps_svc_found) { 2343 p2p_dbg(p2p, "No Service Hash match found"); 2344 p2p_parse_free(&msg); 2345 return P2P_PREQ_NOT_PROCESSED; 2346 } 2347 } else { 2348 /* This is not a P2PS Probe Request */ 2349 p2p_dbg(p2p, "No P2PS Hash in Probe Request"); 2350 2351 if (!p2p->in_listen || !p2p->drv_in_listen) { 2352 /* not in Listen state - ignore Probe Request */ 2353 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request", 2354 p2p->in_listen, p2p->drv_in_listen); 2355 p2p_parse_free(&msg); 2356 return P2P_PREQ_NOT_LISTEN; 2357 } 2358 } 2359 2360 if (msg.device_id && 2361 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2362 /* Device ID did not match */ 2363 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it", 2364 MAC2STR(msg.device_id)); 2365 p2p_parse_free(&msg); 2366 return P2P_PREQ_NOT_PROCESSED; 2367 } 2368 2369 /* Check Requested Device Type match */ 2370 if (msg.wps_attributes && 2371 !p2p_match_dev_type(p2p, msg.wps_attributes)) { 2372 /* No match with Requested Device Type */ 2373 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it"); 2374 p2p_parse_free(&msg); 2375 return P2P_PREQ_NOT_PROCESSED; 2376 } 2377 2378 if (!p2p->cfg->send_probe_resp) { 2379 /* Response generated elsewhere */ 2380 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response"); 2381 p2p_parse_free(&msg); 2382 return P2P_PREQ_NOT_PROCESSED; 2383 } 2384 2385 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state"); 2386 2387 /* 2388 * We do not really have a specific BSS that this frame is advertising, 2389 * so build a frame that has some information in valid format. This is 2390 * really only used for discovery purposes, not to learn exact BSS 2391 * parameters. 2392 */ 2393 ies = p2p_build_probe_resp_ies(p2p, msg.service_hash, 2394 msg.service_hash_count); 2395 p2p_parse_free(&msg); 2396 if (ies == NULL) 2397 return P2P_PREQ_NOT_PROCESSED; 2398 2399 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 2400 if (buf == NULL) { 2401 wpabuf_free(ies); 2402 return P2P_PREQ_NOT_PROCESSED; 2403 } 2404 2405 resp = wpabuf_put(buf, offsetof(struct ieee80211_mgmt, 2406 u.probe_resp.variable)); 2407 2408 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 2409 (WLAN_FC_STYPE_PROBE_RESP << 4)); 2410 os_memcpy(resp->da, addr, ETH_ALEN); 2411 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN); 2412 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN); 2413 resp->u.probe_resp.beacon_int = host_to_le16(100); 2414 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 2415 resp->u.probe_resp.capab_info = 2416 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE | 2417 WLAN_CAPABILITY_PRIVACY | 2418 WLAN_CAPABILITY_SHORT_SLOT_TIME); 2419 2420 wpabuf_put_u8(buf, WLAN_EID_SSID); 2421 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN); 2422 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 2423 2424 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES); 2425 wpabuf_put_u8(buf, 8); 2426 wpabuf_put_u8(buf, (60 / 5) | 0x80); 2427 wpabuf_put_u8(buf, 90 / 5); 2428 wpabuf_put_u8(buf, (120 / 5) | 0x80); 2429 wpabuf_put_u8(buf, 180 / 5); 2430 wpabuf_put_u8(buf, (240 / 5) | 0x80); 2431 wpabuf_put_u8(buf, 360 / 5); 2432 wpabuf_put_u8(buf, 480 / 5); 2433 wpabuf_put_u8(buf, 540 / 5); 2434 2435 if (!rx_freq) { 2436 channel = p2p->cfg->channel; 2437 } else if (p2p_freq_to_channel(rx_freq, &op_class, &channel)) { 2438 wpabuf_free(ies); 2439 wpabuf_free(buf); 2440 return P2P_PREQ_NOT_PROCESSED; 2441 } 2442 2443 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS); 2444 wpabuf_put_u8(buf, 1); 2445 wpabuf_put_u8(buf, channel); 2446 2447 wpabuf_put_buf(buf, ies); 2448 wpabuf_free(ies); 2449 2450 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf, rx_freq); 2451 2452 wpabuf_free(buf); 2453 2454 return P2P_PREQ_PROCESSED; 2455} 2456 2457 2458enum p2p_probe_req_status 2459p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2460 const u8 *bssid, const u8 *ie, size_t ie_len, 2461 unsigned int rx_freq) 2462{ 2463 enum p2p_probe_req_status res; 2464 2465 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len); 2466 2467 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len, rx_freq); 2468 if (res != P2P_PREQ_PROCESSED && res != P2P_PREQ_NOT_PROCESSED) 2469 return res; 2470 2471 /* 2472 * Activate a pending GO Negotiation/Invite flow if a received Probe 2473 * Request frame is from an expected peer. Some devices may share the 2474 * same address for P2P and non-P2P STA running simultaneously. The 2475 * P2P_PREQ_PROCESSED and P2P_PREQ_NOT_PROCESSED p2p_reply_probe() 2476 * return values verified above ensure we are handling a Probe Request 2477 * frame from a P2P peer. 2478 */ 2479 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) && 2480 p2p->go_neg_peer && 2481 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN) 2482 == 0 && 2483 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 2484 /* Received a Probe Request from GO Negotiation peer */ 2485 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout"); 2486 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2487 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL); 2488 return res; 2489 } 2490 2491 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) && 2492 p2p->invite_peer && 2493 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) && 2494 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN) 2495 == 0) { 2496 /* Received a Probe Request from Invite peer */ 2497 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout"); 2498 eloop_cancel_timeout(p2p_invite_start, p2p, NULL); 2499 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL); 2500 return res; 2501 } 2502 2503 return res; 2504} 2505 2506 2507static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid, 2508 u8 *buf, size_t len, struct wpabuf *p2p_ie) 2509{ 2510 struct wpabuf *tmp; 2511 u8 *lpos; 2512 size_t tmplen; 2513 int res; 2514 u8 group_capab; 2515 struct p2p_message msg; 2516 2517 if (p2p_ie == NULL) 2518 return 0; /* WLAN AP is not a P2P manager */ 2519 2520 os_memset(&msg, 0, sizeof(msg)); 2521 if (p2p_parse_p2p_ie(p2p_ie, &msg) < 0) 2522 return 0; 2523 2524 p2p_dbg(p2p, "BSS P2P manageability %s", 2525 msg.manageability ? "enabled" : "disabled"); 2526 2527 if (!msg.manageability) 2528 return 0; 2529 2530 /* 2531 * (Re)Association Request - P2P IE 2532 * P2P Capability attribute (shall be present) 2533 * P2P Interface attribute (present if concurrent device and 2534 * P2P Management is enabled) 2535 */ 2536 tmp = wpabuf_alloc(200); 2537 if (tmp == NULL) 2538 return -1; 2539 2540 lpos = p2p_buf_add_ie_hdr(tmp); 2541 group_capab = 0; 2542 if (p2p->num_groups > 0) { 2543 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; 2544 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2545 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) && 2546 p2p->cross_connect) 2547 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 2548 } 2549 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab); 2550 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2551 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED)) 2552 p2p_buf_add_p2p_interface(tmp, p2p); 2553 p2p_buf_update_ie_hdr(tmp, lpos); 2554 2555 tmplen = wpabuf_len(tmp); 2556 if (tmplen > len) 2557 res = -1; 2558 else { 2559 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2560 res = tmplen; 2561 } 2562 wpabuf_free(tmp); 2563 2564 return res; 2565} 2566 2567 2568int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf, 2569 size_t len, int p2p_group, struct wpabuf *p2p_ie) 2570{ 2571 struct wpabuf *tmp; 2572 u8 *lpos; 2573 struct p2p_device *peer; 2574 size_t tmplen; 2575 int res; 2576 size_t extra = 0; 2577 2578 if (!p2p_group) 2579 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie); 2580 2581#ifdef CONFIG_WIFI_DISPLAY 2582 if (p2p->wfd_ie_assoc_req) 2583 extra = wpabuf_len(p2p->wfd_ie_assoc_req); 2584#endif /* CONFIG_WIFI_DISPLAY */ 2585 2586 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]) 2587 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]); 2588 2589 /* 2590 * (Re)Association Request - P2P IE 2591 * P2P Capability attribute (shall be present) 2592 * Extended Listen Timing (may be present) 2593 * P2P Device Info attribute (shall be present) 2594 */ 2595 tmp = wpabuf_alloc(200 + extra); 2596 if (tmp == NULL) 2597 return -1; 2598 2599#ifdef CONFIG_WIFI_DISPLAY 2600 if (p2p->wfd_ie_assoc_req) 2601 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req); 2602#endif /* CONFIG_WIFI_DISPLAY */ 2603 2604 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]) 2605 wpabuf_put_buf(tmp, 2606 p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]); 2607 2608 peer = bssid ? p2p_get_device(p2p, bssid) : NULL; 2609 2610 lpos = p2p_buf_add_ie_hdr(tmp); 2611 p2p_buf_add_capability(tmp, p2p->dev_capab, 0); 2612 if (p2p->ext_listen_interval) 2613 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period, 2614 p2p->ext_listen_interval); 2615 p2p_buf_add_device_info(tmp, p2p, peer); 2616 p2p_buf_update_ie_hdr(tmp, lpos); 2617 2618 tmplen = wpabuf_len(tmp); 2619 if (tmplen > len) 2620 res = -1; 2621 else { 2622 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2623 res = tmplen; 2624 } 2625 wpabuf_free(tmp); 2626 2627 return res; 2628} 2629 2630 2631int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) 2632{ 2633 struct wpabuf *p2p_ie; 2634 int ret; 2635 2636 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); 2637 if (p2p_ie == NULL) 2638 return 0; 2639 2640 ret = p2p_attr_text(p2p_ie, buf, end); 2641 wpabuf_free(p2p_ie); 2642 return ret; 2643} 2644 2645 2646struct p2ps_advertisement * 2647p2p_service_p2ps_id(struct p2p_data *p2p, u32 adv_id) 2648{ 2649 struct p2ps_advertisement *adv_data; 2650 2651 if (!p2p) 2652 return NULL; 2653 2654 adv_data = p2p->p2ps_adv_list; 2655 while (adv_data) { 2656 if (adv_data->id == adv_id) 2657 return adv_data; 2658 adv_data = adv_data->next; 2659 } 2660 2661 return NULL; 2662} 2663 2664 2665int p2p_service_del_asp(struct p2p_data *p2p, u32 adv_id) 2666{ 2667 struct p2ps_advertisement *adv_data; 2668 struct p2ps_advertisement **prior; 2669 2670 if (!p2p) 2671 return -1; 2672 2673 adv_data = p2p->p2ps_adv_list; 2674 prior = &p2p->p2ps_adv_list; 2675 while (adv_data) { 2676 if (adv_data->id == adv_id) { 2677 p2p_dbg(p2p, "Delete ASP adv_id=0x%x", adv_id); 2678 *prior = adv_data->next; 2679 os_free(adv_data); 2680 return 0; 2681 } 2682 prior = &adv_data->next; 2683 adv_data = adv_data->next; 2684 } 2685 2686 return -1; 2687} 2688 2689 2690int p2p_service_add_asp(struct p2p_data *p2p, int auto_accept, u32 adv_id, 2691 const char *adv_str, u8 svc_state, u16 config_methods, 2692 const char *svc_info) 2693{ 2694 struct p2ps_advertisement *adv_data, *tmp, **prev; 2695 u8 buf[P2PS_HASH_LEN]; 2696 size_t adv_data_len, adv_len, info_len = 0; 2697 2698 if (!p2p || !adv_str || !adv_str[0]) 2699 return -1; 2700 2701 if (!(config_methods & p2p->cfg->config_methods)) { 2702 p2p_dbg(p2p, "Config methods not supported svc: 0x%x dev: 0x%x", 2703 config_methods, p2p->cfg->config_methods); 2704 return -1; 2705 } 2706 2707 if (!p2ps_gen_hash(p2p, adv_str, buf)) 2708 return -1; 2709 2710 if (svc_info) 2711 info_len = os_strlen(svc_info); 2712 adv_len = os_strlen(adv_str); 2713 adv_data_len = sizeof(struct p2ps_advertisement) + adv_len + 1 + 2714 info_len + 1; 2715 2716 adv_data = os_zalloc(adv_data_len); 2717 if (!adv_data) 2718 return -1; 2719 2720 os_memcpy(adv_data->hash, buf, P2PS_HASH_LEN); 2721 adv_data->id = adv_id; 2722 adv_data->state = svc_state; 2723 adv_data->config_methods = config_methods & p2p->cfg->config_methods; 2724 adv_data->auto_accept = (u8) auto_accept; 2725 os_memcpy(adv_data->svc_name, adv_str, adv_len); 2726 2727 if (svc_info && info_len) { 2728 adv_data->svc_info = &adv_data->svc_name[adv_len + 1]; 2729 os_memcpy(adv_data->svc_info, svc_info, info_len); 2730 } 2731 2732 /* 2733 * Group Advertisements by service string. They do not need to be 2734 * sorted, but groups allow easier Probe Response instance grouping 2735 */ 2736 tmp = p2p->p2ps_adv_list; 2737 prev = &p2p->p2ps_adv_list; 2738 while (tmp) { 2739 if (tmp->id == adv_data->id) { 2740 if (os_strcmp(tmp->svc_name, adv_data->svc_name) != 0) { 2741 os_free(adv_data); 2742 return -1; 2743 } 2744 adv_data->next = tmp->next; 2745 *prev = adv_data; 2746 os_free(tmp); 2747 goto inserted; 2748 } else { 2749 if (os_strcmp(tmp->svc_name, adv_data->svc_name) == 0) { 2750 adv_data->next = tmp->next; 2751 tmp->next = adv_data; 2752 goto inserted; 2753 } 2754 } 2755 prev = &tmp->next; 2756 tmp = tmp->next; 2757 } 2758 2759 /* No svc_name match found */ 2760 adv_data->next = p2p->p2ps_adv_list; 2761 p2p->p2ps_adv_list = adv_data; 2762 2763inserted: 2764 p2p_dbg(p2p, 2765 "Added ASP advertisement adv_id=0x%x config_methods=0x%x svc_state=0x%x adv_str='%s'", 2766 adv_id, adv_data->config_methods, svc_state, adv_str); 2767 2768 return 0; 2769} 2770 2771 2772void p2p_service_flush_asp(struct p2p_data *p2p) 2773{ 2774 struct p2ps_advertisement *adv, *prev; 2775 2776 if (!p2p) 2777 return; 2778 2779 adv = p2p->p2ps_adv_list; 2780 while (adv) { 2781 prev = adv; 2782 adv = adv->next; 2783 os_free(prev); 2784 } 2785 2786 p2p->p2ps_adv_list = NULL; 2787 p2p_dbg(p2p, "All ASP advertisements flushed"); 2788} 2789 2790 2791int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr) 2792{ 2793 struct p2p_message msg; 2794 2795 os_memset(&msg, 0, sizeof(msg)); 2796 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 2797 return -1; 2798 2799 if (msg.p2p_device_addr) { 2800 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); 2801 return 0; 2802 } else if (msg.device_id) { 2803 os_memcpy(dev_addr, msg.device_id, ETH_ALEN); 2804 return 0; 2805 } 2806 return -1; 2807} 2808 2809 2810int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr) 2811{ 2812 struct wpabuf *p2p_ie; 2813 int ret; 2814 2815 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 2816 P2P_IE_VENDOR_TYPE); 2817 if (p2p_ie == NULL) 2818 return -1; 2819 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr); 2820 wpabuf_free(p2p_ie); 2821 return ret; 2822} 2823 2824 2825static void p2p_clear_go_neg(struct p2p_data *p2p) 2826{ 2827 p2p->go_neg_peer = NULL; 2828 p2p_clear_timeout(p2p); 2829 p2p_set_state(p2p, P2P_IDLE); 2830} 2831 2832 2833void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr) 2834{ 2835 if (p2p->go_neg_peer == NULL) { 2836 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification"); 2837 return; /* No pending Group Formation */ 2838 } 2839 2840 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) != 2841 0) { 2842 p2p_dbg(p2p, "Ignore WPS registration success notification for " 2843 MACSTR " (GO Negotiation peer " MACSTR ")", 2844 MAC2STR(mac_addr), 2845 MAC2STR(p2p->go_neg_peer->intended_addr)); 2846 return; /* Ignore unexpected peer address */ 2847 } 2848 2849 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR, 2850 MAC2STR(mac_addr)); 2851 2852 p2p_clear_go_neg(p2p); 2853} 2854 2855 2856void p2p_group_formation_failed(struct p2p_data *p2p) 2857{ 2858 if (p2p->go_neg_peer == NULL) { 2859 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification"); 2860 return; /* No pending Group Formation */ 2861 } 2862 2863 p2p_dbg(p2p, "Group Formation failed with " MACSTR, 2864 MAC2STR(p2p->go_neg_peer->intended_addr)); 2865 2866 p2p_clear_go_neg(p2p); 2867} 2868 2869 2870struct p2p_data * p2p_init(const struct p2p_config *cfg) 2871{ 2872 struct p2p_data *p2p; 2873 2874 if (cfg->max_peers < 1 || 2875 cfg->passphrase_len < 8 || cfg->passphrase_len > 63) 2876 return NULL; 2877 2878 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg)); 2879 if (p2p == NULL) 2880 return NULL; 2881 p2p->cfg = (struct p2p_config *) (p2p + 1); 2882 os_memcpy(p2p->cfg, cfg, sizeof(*cfg)); 2883 if (cfg->dev_name) 2884 p2p->cfg->dev_name = os_strdup(cfg->dev_name); 2885 if (cfg->manufacturer) 2886 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer); 2887 if (cfg->model_name) 2888 p2p->cfg->model_name = os_strdup(cfg->model_name); 2889 if (cfg->model_number) 2890 p2p->cfg->model_number = os_strdup(cfg->model_number); 2891 if (cfg->serial_number) 2892 p2p->cfg->serial_number = os_strdup(cfg->serial_number); 2893 if (cfg->pref_chan) { 2894 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan * 2895 sizeof(struct p2p_channel)); 2896 if (p2p->cfg->pref_chan) { 2897 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan, 2898 cfg->num_pref_chan * 2899 sizeof(struct p2p_channel)); 2900 } else 2901 p2p->cfg->num_pref_chan = 0; 2902 } 2903 2904 p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash); 2905 2906 p2p->min_disc_int = 1; 2907 p2p->max_disc_int = 3; 2908 p2p->max_disc_tu = -1; 2909 2910 if (os_get_random(&p2p->next_tie_breaker, 1) < 0) 2911 p2p->next_tie_breaker = 0; 2912 p2p->next_tie_breaker &= 0x01; 2913 if (cfg->sd_request) 2914 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 2915 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE; 2916 if (cfg->concurrent_operations) 2917 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER; 2918 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 2919 2920 dl_list_init(&p2p->devices); 2921 2922 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 2923 p2p_expiration_timeout, p2p, NULL); 2924 2925 p2p->go_timeout = 100; 2926 p2p->client_timeout = 20; 2927 p2p->num_p2p_sd_queries = 0; 2928 2929 p2p_dbg(p2p, "initialized"); 2930 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 2931 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 2932 2933 return p2p; 2934} 2935 2936 2937void p2p_deinit(struct p2p_data *p2p) 2938{ 2939#ifdef CONFIG_WIFI_DISPLAY 2940 wpabuf_free(p2p->wfd_ie_beacon); 2941 wpabuf_free(p2p->wfd_ie_probe_req); 2942 wpabuf_free(p2p->wfd_ie_probe_resp); 2943 wpabuf_free(p2p->wfd_ie_assoc_req); 2944 wpabuf_free(p2p->wfd_ie_invitation); 2945 wpabuf_free(p2p->wfd_ie_prov_disc_req); 2946 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 2947 wpabuf_free(p2p->wfd_ie_go_neg); 2948 wpabuf_free(p2p->wfd_dev_info); 2949 wpabuf_free(p2p->wfd_assoc_bssid); 2950 wpabuf_free(p2p->wfd_coupled_sink_info); 2951#endif /* CONFIG_WIFI_DISPLAY */ 2952 2953 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL); 2954 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 2955 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2956 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2957 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL); 2958 p2p_flush(p2p); 2959 p2p_free_req_dev_types(p2p); 2960 os_free(p2p->cfg->dev_name); 2961 os_free(p2p->cfg->manufacturer); 2962 os_free(p2p->cfg->model_name); 2963 os_free(p2p->cfg->model_number); 2964 os_free(p2p->cfg->serial_number); 2965 os_free(p2p->cfg->pref_chan); 2966 os_free(p2p->groups); 2967 p2ps_prov_free(p2p); 2968 wpabuf_free(p2p->sd_resp); 2969 os_free(p2p->after_scan_tx); 2970 p2p_remove_wps_vendor_extensions(p2p); 2971 os_free(p2p->no_go_freq.range); 2972 p2p_service_flush_asp(p2p); 2973 2974 os_free(p2p); 2975} 2976 2977 2978void p2p_flush(struct p2p_data *p2p) 2979{ 2980 struct p2p_device *dev, *prev; 2981 p2p_stop_find(p2p); 2982 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device, 2983 list) { 2984 dl_list_del(&dev->list); 2985 p2p_device_free(p2p, dev); 2986 } 2987 p2p_free_sd_queries(p2p); 2988 os_free(p2p->after_scan_tx); 2989 p2p->after_scan_tx = NULL; 2990} 2991 2992 2993int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr) 2994{ 2995 struct p2p_device *dev; 2996 2997 dev = p2p_get_device(p2p, addr); 2998 if (dev == NULL) 2999 return -1; 3000 3001 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr)); 3002 3003 if (p2p->go_neg_peer == dev) { 3004 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL); 3005 p2p->go_neg_peer = NULL; 3006 } 3007 3008 dev->wps_method = WPS_NOT_READY; 3009 dev->oob_pw_id = 0; 3010 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 3011 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 3012 3013 /* Check if after_scan_tx is for this peer. If so free it */ 3014 if (p2p->after_scan_tx && 3015 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) { 3016 os_free(p2p->after_scan_tx); 3017 p2p->after_scan_tx = NULL; 3018 } 3019 3020 return 0; 3021} 3022 3023 3024int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name) 3025{ 3026 os_free(p2p->cfg->dev_name); 3027 if (dev_name) { 3028 p2p->cfg->dev_name = os_strdup(dev_name); 3029 if (p2p->cfg->dev_name == NULL) 3030 return -1; 3031 } else 3032 p2p->cfg->dev_name = NULL; 3033 return 0; 3034} 3035 3036 3037int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer) 3038{ 3039 os_free(p2p->cfg->manufacturer); 3040 p2p->cfg->manufacturer = NULL; 3041 if (manufacturer) { 3042 p2p->cfg->manufacturer = os_strdup(manufacturer); 3043 if (p2p->cfg->manufacturer == NULL) 3044 return -1; 3045 } 3046 3047 return 0; 3048} 3049 3050 3051int p2p_set_model_name(struct p2p_data *p2p, const char *model_name) 3052{ 3053 os_free(p2p->cfg->model_name); 3054 p2p->cfg->model_name = NULL; 3055 if (model_name) { 3056 p2p->cfg->model_name = os_strdup(model_name); 3057 if (p2p->cfg->model_name == NULL) 3058 return -1; 3059 } 3060 3061 return 0; 3062} 3063 3064 3065int p2p_set_model_number(struct p2p_data *p2p, const char *model_number) 3066{ 3067 os_free(p2p->cfg->model_number); 3068 p2p->cfg->model_number = NULL; 3069 if (model_number) { 3070 p2p->cfg->model_number = os_strdup(model_number); 3071 if (p2p->cfg->model_number == NULL) 3072 return -1; 3073 } 3074 3075 return 0; 3076} 3077 3078 3079int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number) 3080{ 3081 os_free(p2p->cfg->serial_number); 3082 p2p->cfg->serial_number = NULL; 3083 if (serial_number) { 3084 p2p->cfg->serial_number = os_strdup(serial_number); 3085 if (p2p->cfg->serial_number == NULL) 3086 return -1; 3087 } 3088 3089 return 0; 3090} 3091 3092 3093void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods) 3094{ 3095 p2p->cfg->config_methods = config_methods; 3096} 3097 3098 3099void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid) 3100{ 3101 os_memcpy(p2p->cfg->uuid, uuid, 16); 3102} 3103 3104 3105int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type) 3106{ 3107 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8); 3108 return 0; 3109} 3110 3111 3112int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8], 3113 size_t num_dev_types) 3114{ 3115 if (num_dev_types > P2P_SEC_DEVICE_TYPES) 3116 num_dev_types = P2P_SEC_DEVICE_TYPES; 3117 p2p->cfg->num_sec_dev_types = num_dev_types; 3118 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8); 3119 return 0; 3120} 3121 3122 3123void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p) 3124{ 3125 int i; 3126 3127 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 3128 wpabuf_free(p2p->wps_vendor_ext[i]); 3129 p2p->wps_vendor_ext[i] = NULL; 3130 } 3131} 3132 3133 3134int p2p_add_wps_vendor_extension(struct p2p_data *p2p, 3135 const struct wpabuf *vendor_ext) 3136{ 3137 int i; 3138 3139 if (vendor_ext == NULL) 3140 return -1; 3141 3142 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 3143 if (p2p->wps_vendor_ext[i] == NULL) 3144 break; 3145 } 3146 if (i >= P2P_MAX_WPS_VENDOR_EXT) 3147 return -1; 3148 3149 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext); 3150 if (p2p->wps_vendor_ext[i] == NULL) 3151 return -1; 3152 3153 return 0; 3154} 3155 3156 3157int p2p_set_country(struct p2p_data *p2p, const char *country) 3158{ 3159 os_memcpy(p2p->cfg->country, country, 3); 3160 return 0; 3161} 3162 3163 3164static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev) 3165{ 3166 if (dev->sd_pending_bcast_queries == 0) { 3167 /* Initialize with total number of registered broadcast 3168 * SD queries. */ 3169 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries; 3170 } 3171 3172 if (p2p_start_sd(p2p, dev) == 0) 3173 return 1; 3174 3175 if (dev->req_config_methods && 3176 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) { 3177 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 3178 MACSTR " (config methods 0x%x)", 3179 MAC2STR(dev->info.p2p_device_addr), 3180 dev->req_config_methods); 3181 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0) 3182 return 1; 3183 } 3184 3185 return 0; 3186} 3187 3188 3189void p2p_continue_find(struct p2p_data *p2p) 3190{ 3191 struct p2p_device *dev; 3192 int found; 3193 3194 p2p_set_state(p2p, P2P_SEARCH); 3195 3196 /* Continue from the device following the last iteration */ 3197 found = 0; 3198 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3199 if (dev == p2p->last_p2p_find_oper) { 3200 found = 1; 3201 continue; 3202 } 3203 if (!found) 3204 continue; 3205 if (p2p_pre_find_operation(p2p, dev) > 0) { 3206 p2p->last_p2p_find_oper = dev; 3207 return; 3208 } 3209 } 3210 3211 /* 3212 * Wrap around to the beginning of the list and continue until the last 3213 * iteration device. 3214 */ 3215 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3216 if (p2p_pre_find_operation(p2p, dev) > 0) { 3217 p2p->last_p2p_find_oper = dev; 3218 return; 3219 } 3220 if (dev == p2p->last_p2p_find_oper) 3221 break; 3222 } 3223 3224 p2p_listen_in_find(p2p, 1); 3225} 3226 3227 3228static void p2p_sd_cb(struct p2p_data *p2p, int success) 3229{ 3230 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d", 3231 success); 3232 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3233 3234 if (!success) { 3235 if (p2p->sd_peer) 3236 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3237 p2p->sd_peer = NULL; 3238 if (p2p->state != P2P_IDLE) 3239 p2p_continue_find(p2p); 3240 return; 3241 } 3242 3243 if (p2p->sd_peer == NULL) { 3244 p2p_dbg(p2p, "No SD peer entry known"); 3245 if (p2p->state != P2P_IDLE) 3246 p2p_continue_find(p2p); 3247 return; 3248 } 3249 3250 if (p2p->sd_query && p2p->sd_query->for_all_peers) { 3251 /* Update the pending broadcast SD query count for this device 3252 */ 3253 p2p->sd_peer->sd_pending_bcast_queries--; 3254 3255 /* 3256 * If there are no pending broadcast queries for this device, 3257 * mark it as done (-1). 3258 */ 3259 if (p2p->sd_peer->sd_pending_bcast_queries == 0) 3260 p2p->sd_peer->sd_pending_bcast_queries = -1; 3261 } 3262 3263 /* Wait for response from the peer */ 3264 p2p_set_state(p2p, P2P_SD_DURING_FIND); 3265 p2p_set_timeout(p2p, 0, 200000); 3266} 3267 3268 3269/** 3270 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state 3271 * @p2p: P2P module context from p2p_init() 3272 */ 3273static void p2p_retry_pd(struct p2p_data *p2p) 3274{ 3275 struct p2p_device *dev; 3276 3277 /* 3278 * Retry the prov disc req attempt only for the peer that the user had 3279 * requested. 3280 */ 3281 3282 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3283 if (os_memcmp(p2p->pending_pd_devaddr, 3284 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3285 continue; 3286 if (!dev->req_config_methods) 3287 continue; 3288 3289 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 3290 MACSTR " (config methods 0x%x)", 3291 MAC2STR(dev->info.p2p_device_addr), 3292 dev->req_config_methods); 3293 p2p_send_prov_disc_req(p2p, dev, 3294 dev->flags & P2P_DEV_PD_FOR_JOIN, 3295 p2p->pd_force_freq); 3296 return; 3297 } 3298} 3299 3300 3301static void p2p_prov_disc_cb(struct p2p_data *p2p, int success) 3302{ 3303 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d", 3304 success); 3305 3306 /* 3307 * Postpone resetting the pending action state till after we actually 3308 * time out. This allows us to take some action like notifying any 3309 * interested parties about no response to the request. 3310 * 3311 * When the timer (below) goes off we check in IDLE, SEARCH, or 3312 * LISTEN_ONLY state, which are the only allowed states to issue a PD 3313 * requests in, if this was still pending and then raise notification. 3314 */ 3315 3316 if (!success) { 3317 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3318 3319 if (p2p->user_initiated_pd && 3320 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY)) 3321 { 3322 /* Retry request from timeout to avoid busy loops */ 3323 p2p->pending_action_state = P2P_PENDING_PD; 3324 p2p_set_timeout(p2p, 0, 50000); 3325 } else if (p2p->state != P2P_IDLE) 3326 p2p_continue_find(p2p); 3327 else if (p2p->user_initiated_pd) { 3328 p2p->pending_action_state = P2P_PENDING_PD; 3329 p2p_set_timeout(p2p, 0, 300000); 3330 } 3331 return; 3332 } 3333 3334 /* 3335 * This postponing, of resetting pending_action_state, needs to be 3336 * done only for user initiated PD requests and not internal ones. 3337 */ 3338 if (p2p->user_initiated_pd) 3339 p2p->pending_action_state = P2P_PENDING_PD; 3340 else 3341 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3342 3343 /* Wait for response from the peer */ 3344 if (p2p->state == P2P_SEARCH) 3345 p2p_set_state(p2p, P2P_PD_DURING_FIND); 3346 p2p_set_timeout(p2p, 0, 200000); 3347} 3348 3349 3350static int p2p_check_after_scan_tx_continuation(struct p2p_data *p2p) 3351{ 3352 if (p2p->after_scan_tx_in_progress) { 3353 p2p->after_scan_tx_in_progress = 0; 3354 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING && 3355 p2p_run_after_scan(p2p)) 3356 return 1; 3357 if (p2p->state == P2P_SEARCH) { 3358 p2p_dbg(p2p, "Continue find after after_scan_tx completion"); 3359 p2p_continue_find(p2p); 3360 } 3361 } 3362 3363 return 0; 3364} 3365 3366 3367static void p2p_prov_disc_resp_cb(struct p2p_data *p2p, int success) 3368{ 3369 p2p_dbg(p2p, "Provision Discovery Response TX callback: success=%d", 3370 success); 3371 3372 if (p2p->send_action_in_progress) { 3373 p2p->send_action_in_progress = 0; 3374 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3375 } 3376 3377 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3378 3379 if (!success) 3380 goto continue_search; 3381 3382 if (!p2p->cfg->prov_disc_resp_cb || 3383 p2p->cfg->prov_disc_resp_cb(p2p->cfg->cb_ctx) < 1) 3384 goto continue_search; 3385 3386 p2p_dbg(p2p, 3387 "Post-Provision Discovery operations started - do not try to continue other P2P operations"); 3388 return; 3389 3390continue_search: 3391 p2p_check_after_scan_tx_continuation(p2p); 3392} 3393 3394 3395int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq, 3396 struct os_reltime *rx_time, int level, const u8 *ies, 3397 size_t ies_len) 3398{ 3399 if (os_reltime_before(rx_time, &p2p->find_start)) { 3400 /* 3401 * The driver may have cached (e.g., in cfg80211 BSS table) the 3402 * scan results for relatively long time. To avoid reporting 3403 * stale information, update P2P peers only based on results 3404 * that have based on frames received after the last p2p_find 3405 * operation was started. 3406 */ 3407 p2p_dbg(p2p, "Ignore old scan result for " MACSTR 3408 " (rx_time=%u.%06u)", 3409 MAC2STR(bssid), (unsigned int) rx_time->sec, 3410 (unsigned int) rx_time->usec); 3411 return 0; 3412 } 3413 3414 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1); 3415 3416 return 0; 3417} 3418 3419 3420void p2p_scan_res_handled(struct p2p_data *p2p) 3421{ 3422 if (!p2p->p2p_scan_running) { 3423 p2p_dbg(p2p, "p2p_scan was not running, but scan results received"); 3424 } 3425 p2p->p2p_scan_running = 0; 3426 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 3427 3428 if (p2p_run_after_scan(p2p)) 3429 return; 3430 if (p2p->state == P2P_SEARCH) 3431 p2p_continue_find(p2p); 3432} 3433 3434 3435void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id) 3436{ 3437 u8 dev_capab; 3438 u8 *len; 3439 3440#ifdef CONFIG_WIFI_DISPLAY 3441 if (p2p->wfd_ie_probe_req) 3442 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req); 3443#endif /* CONFIG_WIFI_DISPLAY */ 3444 3445 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]) 3446 wpabuf_put_buf(ies, 3447 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]); 3448 3449 len = p2p_buf_add_ie_hdr(ies); 3450 3451 dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3452 3453 /* P2PS requires Probe Request frames to include SD bit */ 3454 if (p2p->p2ps_seek && p2p->p2ps_seek_count) 3455 dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 3456 3457 p2p_buf_add_capability(ies, dev_capab, 0); 3458 3459 if (dev_id) 3460 p2p_buf_add_device_id(ies, dev_id); 3461 if (p2p->cfg->reg_class && p2p->cfg->channel) 3462 p2p_buf_add_listen_channel(ies, p2p->cfg->country, 3463 p2p->cfg->reg_class, 3464 p2p->cfg->channel); 3465 if (p2p->ext_listen_interval) 3466 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period, 3467 p2p->ext_listen_interval); 3468 3469 if (p2p->p2ps_seek && p2p->p2ps_seek_count) 3470 p2p_buf_add_service_hash(ies, p2p); 3471 3472 /* TODO: p2p_buf_add_operating_channel() if GO */ 3473 p2p_buf_update_ie_hdr(ies, len); 3474} 3475 3476 3477size_t p2p_scan_ie_buf_len(struct p2p_data *p2p) 3478{ 3479 size_t len = 100; 3480 3481#ifdef CONFIG_WIFI_DISPLAY 3482 if (p2p && p2p->wfd_ie_probe_req) 3483 len += wpabuf_len(p2p->wfd_ie_probe_req); 3484#endif /* CONFIG_WIFI_DISPLAY */ 3485 3486 if (p2p && p2p->vendor_elem && 3487 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]) 3488 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]); 3489 3490 return len; 3491} 3492 3493 3494int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end) 3495{ 3496 return p2p_attr_text(p2p_ie, buf, end); 3497} 3498 3499 3500static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success) 3501{ 3502 struct p2p_device *dev = p2p->go_neg_peer; 3503 int timeout; 3504 3505 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success); 3506 3507 if (dev == NULL) { 3508 p2p_dbg(p2p, "No pending GO Negotiation"); 3509 return; 3510 } 3511 3512 if (success) { 3513 if (dev->flags & P2P_DEV_USER_REJECTED) { 3514 p2p_set_state(p2p, P2P_IDLE); 3515 return; 3516 } 3517 } else if (dev->go_neg_req_sent) { 3518 /* Cancel the increment from p2p_connect_send() on failure */ 3519 dev->go_neg_req_sent--; 3520 } 3521 3522 if (!success && 3523 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) && 3524 !is_zero_ether_addr(dev->member_in_go_dev)) { 3525 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO", 3526 MAC2STR(dev->info.p2p_device_addr)); 3527 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3528 p2p_send_dev_disc_req(p2p, dev); 3529 return; 3530 } 3531 3532 /* 3533 * Use P2P find, if needed, to find the other device from its listen 3534 * channel. 3535 */ 3536 p2p_set_state(p2p, P2P_CONNECT); 3537 timeout = success ? 500000 : 100000; 3538 if (!success && p2p->go_neg_peer && 3539 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) { 3540 unsigned int r; 3541 /* 3542 * Peer is expected to wait our response and we will skip the 3543 * listen phase. Add some randomness to the wait time here to 3544 * make it less likely to hit cases where we could end up in 3545 * sync with peer not listening. 3546 */ 3547 if (os_get_random((u8 *) &r, sizeof(r)) < 0) 3548 r = 0; 3549 timeout += r % 100000; 3550 } 3551 p2p_set_timeout(p2p, 0, timeout); 3552} 3553 3554 3555static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success) 3556{ 3557 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d", 3558 success); 3559 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) { 3560 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore"); 3561 return; 3562 } 3563 p2p_set_state(p2p, P2P_CONNECT); 3564 p2p_set_timeout(p2p, 0, 500000); 3565} 3566 3567 3568static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success, 3569 const u8 *addr) 3570{ 3571 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success); 3572 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) { 3573 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status); 3574 return; 3575 } 3576 3577 if (success) { 3578 struct p2p_device *dev; 3579 dev = p2p_get_device(p2p, addr); 3580 if (dev && 3581 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) 3582 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE; 3583 } 3584 3585 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND) 3586 p2p_continue_find(p2p); 3587} 3588 3589 3590static void p2p_go_neg_conf_cb(struct p2p_data *p2p, 3591 enum p2p_send_action_result result) 3592{ 3593 struct p2p_device *dev; 3594 3595 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result); 3596 if (result == P2P_SEND_ACTION_FAILED) { 3597 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3598 p2p_go_neg_failed(p2p, -1); 3599 return; 3600 } 3601 3602 dev = p2p->go_neg_peer; 3603 3604 if (result == P2P_SEND_ACTION_NO_ACK) { 3605 /* 3606 * Retry GO Negotiation Confirmation 3607 * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive 3608 * ACK for confirmation. 3609 */ 3610 if (dev && dev->go_neg_conf && 3611 dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) { 3612 p2p_dbg(p2p, "GO Negotiation Confirm retry %d", 3613 dev->go_neg_conf_sent); 3614 p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM; 3615 if (p2p_send_action(p2p, dev->go_neg_conf_freq, 3616 dev->info.p2p_device_addr, 3617 p2p->cfg->dev_addr, 3618 dev->info.p2p_device_addr, 3619 wpabuf_head(dev->go_neg_conf), 3620 wpabuf_len(dev->go_neg_conf), 0) >= 3621 0) { 3622 dev->go_neg_conf_sent++; 3623 return; 3624 } 3625 p2p_dbg(p2p, "Failed to re-send Action frame"); 3626 3627 /* 3628 * Continue with the assumption that the first attempt 3629 * went through and just the ACK frame was lost. 3630 */ 3631 } 3632 3633 /* 3634 * It looks like the TX status for GO Negotiation Confirm is 3635 * often showing failure even when the peer has actually 3636 * received the frame. Since the peer may change channels 3637 * immediately after having received the frame, we may not see 3638 * an Ack for retries, so just dropping a single frame may 3639 * trigger this. To allow the group formation to succeed if the 3640 * peer did indeed receive the frame, continue regardless of 3641 * the TX status. 3642 */ 3643 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported"); 3644 } 3645 3646 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3647 3648 if (dev == NULL) 3649 return; 3650 3651 p2p_go_complete(p2p, dev); 3652} 3653 3654 3655void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 3656 const u8 *src, const u8 *bssid, 3657 enum p2p_send_action_result result) 3658{ 3659 enum p2p_pending_action_state state; 3660 int success; 3661 3662 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR 3663 " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)", 3664 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), 3665 MAC2STR(bssid), result, p2p_state_txt(p2p->state)); 3666 success = result == P2P_SEND_ACTION_SUCCESS; 3667 state = p2p->pending_action_state; 3668 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3669 switch (state) { 3670 case P2P_NO_PENDING_ACTION: 3671 if (p2p->send_action_in_progress) { 3672 p2p->send_action_in_progress = 0; 3673 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3674 } 3675 p2p_check_after_scan_tx_continuation(p2p); 3676 break; 3677 case P2P_PENDING_GO_NEG_REQUEST: 3678 p2p_go_neg_req_cb(p2p, success); 3679 break; 3680 case P2P_PENDING_GO_NEG_RESPONSE: 3681 p2p_go_neg_resp_cb(p2p, success); 3682 break; 3683 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE: 3684 p2p_go_neg_resp_failure_cb(p2p, success, dst); 3685 break; 3686 case P2P_PENDING_GO_NEG_CONFIRM: 3687 p2p_go_neg_conf_cb(p2p, result); 3688 break; 3689 case P2P_PENDING_SD: 3690 p2p_sd_cb(p2p, success); 3691 break; 3692 case P2P_PENDING_PD: 3693 p2p_prov_disc_cb(p2p, success); 3694 break; 3695 case P2P_PENDING_PD_RESPONSE: 3696 p2p_prov_disc_resp_cb(p2p, success); 3697 break; 3698 case P2P_PENDING_INVITATION_REQUEST: 3699 p2p_invitation_req_cb(p2p, success); 3700 break; 3701 case P2P_PENDING_INVITATION_RESPONSE: 3702 p2p_invitation_resp_cb(p2p, success); 3703 break; 3704 case P2P_PENDING_DEV_DISC_REQUEST: 3705 p2p_dev_disc_req_cb(p2p, success); 3706 break; 3707 case P2P_PENDING_DEV_DISC_RESPONSE: 3708 p2p_dev_disc_resp_cb(p2p, success); 3709 break; 3710 case P2P_PENDING_GO_DISC_REQ: 3711 p2p_go_disc_req_cb(p2p, success); 3712 break; 3713 } 3714 3715 p2p->after_scan_tx_in_progress = 0; 3716} 3717 3718 3719void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq, 3720 unsigned int duration) 3721{ 3722 if (freq == p2p->pending_client_disc_freq) { 3723 p2p_dbg(p2p, "Client discoverability remain-awake completed"); 3724 p2p->pending_client_disc_freq = 0; 3725 return; 3726 } 3727 3728 if (freq != p2p->pending_listen_freq) { 3729 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)", 3730 freq, duration, p2p->pending_listen_freq); 3731 return; 3732 } 3733 3734 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback", 3735 p2p->pending_listen_sec, p2p->pending_listen_usec, 3736 p2p->pending_listen_freq); 3737 p2p->in_listen = 1; 3738 p2p->drv_in_listen = freq; 3739 if (p2p->pending_listen_sec || p2p->pending_listen_usec) { 3740 /* 3741 * Add 20 msec extra wait to avoid race condition with driver 3742 * remain-on-channel end event, i.e., give driver more time to 3743 * complete the operation before our timeout expires. 3744 */ 3745 p2p_set_timeout(p2p, p2p->pending_listen_sec, 3746 p2p->pending_listen_usec + 20000); 3747 } 3748 3749 p2p->pending_listen_freq = 0; 3750} 3751 3752 3753int p2p_listen_end(struct p2p_data *p2p, unsigned int freq) 3754{ 3755 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq); 3756 p2p->drv_in_listen = 0; 3757 if (p2p->in_listen) 3758 return 0; /* Internal timeout will trigger the next step */ 3759 3760 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) { 3761 if (p2p->go_neg_peer->connect_reqs >= 120) { 3762 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3763 p2p_go_neg_failed(p2p, -1); 3764 return 0; 3765 } 3766 3767 p2p_set_state(p2p, P2P_CONNECT); 3768 p2p_connect_send(p2p, p2p->go_neg_peer); 3769 return 1; 3770 } else if (p2p->state == P2P_SEARCH) { 3771 if (p2p->p2p_scan_running) { 3772 /* 3773 * Search is already in progress. This can happen if 3774 * an Action frame RX is reported immediately after 3775 * the end of a remain-on-channel operation and the 3776 * response frame to that is sent using an offchannel 3777 * operation while in p2p_find. Avoid an attempt to 3778 * restart a scan here. 3779 */ 3780 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one"); 3781 return 1; 3782 } 3783 if (p2p->pending_listen_freq) { 3784 /* 3785 * Better wait a bit if the driver is unable to start 3786 * offchannel operation for some reason. p2p_search() 3787 * will be started from internal timeout. 3788 */ 3789 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop"); 3790 p2p_set_timeout(p2p, 0, 100000); 3791 return 1; 3792 } 3793 if (p2p->search_delay) { 3794 p2p_dbg(p2p, "Delay search operation by %u ms", 3795 p2p->search_delay); 3796 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3797 (p2p->search_delay % 1000) * 1000); 3798 return 1; 3799 } 3800 p2p_search(p2p); 3801 return 1; 3802 } 3803 3804 return 0; 3805} 3806 3807 3808static void p2p_timeout_connect(struct p2p_data *p2p) 3809{ 3810 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3811 if (p2p->go_neg_peer && 3812 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 3813 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed"); 3814 p2p_go_neg_failed(p2p, -1); 3815 return; 3816 } 3817 if (p2p->go_neg_peer && 3818 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) && 3819 p2p->go_neg_peer->connect_reqs < 120) { 3820 p2p_dbg(p2p, "Peer expected to wait our response - skip listen"); 3821 p2p_connect_send(p2p, p2p->go_neg_peer); 3822 return; 3823 } 3824 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) { 3825 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)"); 3826 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3827 p2p_set_timeout(p2p, 0, 30000); 3828 return; 3829 } 3830 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3831 p2p_listen_in_find(p2p, 0); 3832} 3833 3834 3835static void p2p_timeout_connect_listen(struct p2p_data *p2p) 3836{ 3837 if (p2p->go_neg_peer) { 3838 if (p2p->drv_in_listen) { 3839 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete"); 3840 return; 3841 } 3842 3843 if (p2p->go_neg_peer->connect_reqs >= 120) { 3844 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3845 p2p_go_neg_failed(p2p, -1); 3846 return; 3847 } 3848 3849 p2p_set_state(p2p, P2P_CONNECT); 3850 p2p_connect_send(p2p, p2p->go_neg_peer); 3851 } else 3852 p2p_set_state(p2p, P2P_IDLE); 3853} 3854 3855 3856static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p) 3857{ 3858 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 3859 3860 if (p2p->cfg->is_concurrent_session_active && 3861 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx)) 3862 p2p_set_timeout(p2p, 0, 500000); 3863 else 3864 p2p_set_timeout(p2p, 0, 200000); 3865} 3866 3867 3868static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p) 3869{ 3870 struct p2p_device *dev = p2p->go_neg_peer; 3871 3872 if (dev == NULL) { 3873 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait"); 3874 return; 3875 } 3876 3877 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation"); 3878 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT); 3879 p2p_listen_in_find(p2p, 0); 3880} 3881 3882 3883static void p2p_timeout_sd_during_find(struct p2p_data *p2p) 3884{ 3885 p2p_dbg(p2p, "Service Discovery Query timeout"); 3886 if (p2p->sd_peer) { 3887 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3888 p2p->sd_peer = NULL; 3889 } 3890 p2p_continue_find(p2p); 3891} 3892 3893 3894static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p) 3895{ 3896 p2p_dbg(p2p, "Provision Discovery Request timeout"); 3897 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3898 p2p_continue_find(p2p); 3899} 3900 3901 3902static void p2p_timeout_prov_disc_req(struct p2p_data *p2p) 3903{ 3904 u32 adv_id = 0; 3905 u8 *adv_mac = NULL; 3906 3907 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3908 3909 /* 3910 * For user initiated PD requests that we have not gotten any responses 3911 * for while in IDLE state, we retry them a couple of times before 3912 * giving up. 3913 */ 3914 if (!p2p->user_initiated_pd) 3915 return; 3916 3917 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout"); 3918 3919 if (p2p->pd_retries) { 3920 p2p->pd_retries--; 3921 p2p_retry_pd(p2p); 3922 } else { 3923 struct p2p_device *dev; 3924 int for_join = 0; 3925 3926 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3927 if (os_memcmp(p2p->pending_pd_devaddr, 3928 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3929 continue; 3930 if (dev->req_config_methods && 3931 (dev->flags & P2P_DEV_PD_FOR_JOIN)) 3932 for_join = 1; 3933 } 3934 3935 if (p2p->p2ps_prov) { 3936 adv_id = p2p->p2ps_prov->adv_id; 3937 adv_mac = p2p->p2ps_prov->adv_mac; 3938 } 3939 3940 if (p2p->cfg->prov_disc_fail) 3941 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, 3942 p2p->pending_pd_devaddr, 3943 for_join ? 3944 P2P_PROV_DISC_TIMEOUT_JOIN : 3945 P2P_PROV_DISC_TIMEOUT, 3946 adv_id, adv_mac, NULL); 3947 p2p_reset_pending_pd(p2p); 3948 } 3949} 3950 3951 3952static void p2p_timeout_invite(struct p2p_data *p2p) 3953{ 3954 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3955 p2p_set_state(p2p, P2P_INVITE_LISTEN); 3956 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 3957 /* 3958 * Better remain on operating channel instead of listen channel 3959 * when running a group. 3960 */ 3961 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel"); 3962 p2p_set_timeout(p2p, 0, 100000); 3963 return; 3964 } 3965 p2p_listen_in_find(p2p, 0); 3966} 3967 3968 3969static void p2p_timeout_invite_listen(struct p2p_data *p2p) 3970{ 3971 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) { 3972 p2p_set_state(p2p, P2P_INVITE); 3973 p2p_invite_send(p2p, p2p->invite_peer, 3974 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id); 3975 } else { 3976 if (p2p->invite_peer) { 3977 p2p_dbg(p2p, "Invitation Request retry limit reached"); 3978 if (p2p->cfg->invitation_result) 3979 p2p->cfg->invitation_result( 3980 p2p->cfg->cb_ctx, -1, NULL, NULL, 3981 p2p->invite_peer->info.p2p_device_addr, 3982 0, 0); 3983 } 3984 p2p_set_state(p2p, P2P_IDLE); 3985 } 3986} 3987 3988 3989static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx) 3990{ 3991 struct p2p_data *p2p = eloop_ctx; 3992 3993 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state)); 3994 3995 p2p->in_listen = 0; 3996 if (p2p->drv_in_listen) { 3997 p2p_dbg(p2p, "Driver is still in listen state - stop it"); 3998 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 3999 } 4000 4001 switch (p2p->state) { 4002 case P2P_IDLE: 4003 /* Check if we timed out waiting for PD req */ 4004 if (p2p->pending_action_state == P2P_PENDING_PD) 4005 p2p_timeout_prov_disc_req(p2p); 4006 break; 4007 case P2P_SEARCH: 4008 /* Check if we timed out waiting for PD req */ 4009 if (p2p->pending_action_state == P2P_PENDING_PD) 4010 p2p_timeout_prov_disc_req(p2p); 4011 if (p2p->search_delay && !p2p->in_search_delay) { 4012 p2p_dbg(p2p, "Delay search operation by %u ms", 4013 p2p->search_delay); 4014 p2p->in_search_delay = 1; 4015 p2p_set_timeout(p2p, p2p->search_delay / 1000, 4016 (p2p->search_delay % 1000) * 1000); 4017 break; 4018 } 4019 p2p->in_search_delay = 0; 4020 p2p_search(p2p); 4021 break; 4022 case P2P_CONNECT: 4023 p2p_timeout_connect(p2p); 4024 break; 4025 case P2P_CONNECT_LISTEN: 4026 p2p_timeout_connect_listen(p2p); 4027 break; 4028 case P2P_GO_NEG: 4029 break; 4030 case P2P_LISTEN_ONLY: 4031 /* Check if we timed out waiting for PD req */ 4032 if (p2p->pending_action_state == P2P_PENDING_PD) 4033 p2p_timeout_prov_disc_req(p2p); 4034 4035 if (p2p->ext_listen_only) { 4036 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed"); 4037 p2p->ext_listen_only = 0; 4038 p2p_set_state(p2p, P2P_IDLE); 4039 } 4040 break; 4041 case P2P_WAIT_PEER_CONNECT: 4042 p2p_timeout_wait_peer_connect(p2p); 4043 break; 4044 case P2P_WAIT_PEER_IDLE: 4045 p2p_timeout_wait_peer_idle(p2p); 4046 break; 4047 case P2P_SD_DURING_FIND: 4048 p2p_timeout_sd_during_find(p2p); 4049 break; 4050 case P2P_PROVISIONING: 4051 break; 4052 case P2P_PD_DURING_FIND: 4053 p2p_timeout_prov_disc_during_find(p2p); 4054 break; 4055 case P2P_INVITE: 4056 p2p_timeout_invite(p2p); 4057 break; 4058 case P2P_INVITE_LISTEN: 4059 p2p_timeout_invite_listen(p2p); 4060 break; 4061 } 4062} 4063 4064 4065int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr) 4066{ 4067 struct p2p_device *dev; 4068 4069 dev = p2p_get_device(p2p, peer_addr); 4070 p2p_dbg(p2p, "Local request to reject connection attempts by peer " 4071 MACSTR, MAC2STR(peer_addr)); 4072 if (dev == NULL) { 4073 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr)); 4074 return -1; 4075 } 4076 dev->status = P2P_SC_FAIL_REJECTED_BY_USER; 4077 dev->flags |= P2P_DEV_USER_REJECTED; 4078 return 0; 4079} 4080 4081 4082const char * p2p_wps_method_text(enum p2p_wps_method method) 4083{ 4084 switch (method) { 4085 case WPS_NOT_READY: 4086 return "not-ready"; 4087 case WPS_PIN_DISPLAY: 4088 return "Display"; 4089 case WPS_PIN_KEYPAD: 4090 return "Keypad"; 4091 case WPS_PBC: 4092 return "PBC"; 4093 case WPS_NFC: 4094 return "NFC"; 4095 case WPS_P2PS: 4096 return "P2PS"; 4097 } 4098 4099 return "??"; 4100} 4101 4102 4103static const char * p2p_go_state_text(enum p2p_go_state go_state) 4104{ 4105 switch (go_state) { 4106 case UNKNOWN_GO: 4107 return "unknown"; 4108 case LOCAL_GO: 4109 return "local"; 4110 case REMOTE_GO: 4111 return "remote"; 4112 } 4113 4114 return "??"; 4115} 4116 4117 4118const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p, 4119 const u8 *addr, int next) 4120{ 4121 struct p2p_device *dev; 4122 4123 if (addr) 4124 dev = p2p_get_device(p2p, addr); 4125 else 4126 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4127 4128 if (dev && next) { 4129 dev = dl_list_first(&dev->list, struct p2p_device, list); 4130 if (&dev->list == &p2p->devices) 4131 dev = NULL; 4132 } 4133 4134 if (dev == NULL) 4135 return NULL; 4136 4137 return &dev->info; 4138} 4139 4140 4141int p2p_get_peer_info_txt(const struct p2p_peer_info *info, 4142 char *buf, size_t buflen) 4143{ 4144 struct p2p_device *dev; 4145 int res; 4146 char *pos, *end; 4147 struct os_reltime now; 4148 4149 if (info == NULL) 4150 return -1; 4151 4152 dev = (struct p2p_device *) (((u8 *) info) - 4153 offsetof(struct p2p_device, info)); 4154 4155 pos = buf; 4156 end = buf + buflen; 4157 4158 os_get_reltime(&now); 4159 res = os_snprintf(pos, end - pos, 4160 "age=%d\n" 4161 "listen_freq=%d\n" 4162 "wps_method=%s\n" 4163 "interface_addr=" MACSTR "\n" 4164 "member_in_go_dev=" MACSTR "\n" 4165 "member_in_go_iface=" MACSTR "\n" 4166 "go_neg_req_sent=%d\n" 4167 "go_state=%s\n" 4168 "dialog_token=%u\n" 4169 "intended_addr=" MACSTR "\n" 4170 "country=%c%c\n" 4171 "oper_freq=%d\n" 4172 "req_config_methods=0x%x\n" 4173 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n" 4174 "status=%d\n" 4175 "invitation_reqs=%u\n", 4176 (int) (now.sec - dev->last_seen.sec), 4177 dev->listen_freq, 4178 p2p_wps_method_text(dev->wps_method), 4179 MAC2STR(dev->interface_addr), 4180 MAC2STR(dev->member_in_go_dev), 4181 MAC2STR(dev->member_in_go_iface), 4182 dev->go_neg_req_sent, 4183 p2p_go_state_text(dev->go_state), 4184 dev->dialog_token, 4185 MAC2STR(dev->intended_addr), 4186 dev->country[0] ? dev->country[0] : '_', 4187 dev->country[1] ? dev->country[1] : '_', 4188 dev->oper_freq, 4189 dev->req_config_methods, 4190 dev->flags & P2P_DEV_PROBE_REQ_ONLY ? 4191 "[PROBE_REQ_ONLY]" : "", 4192 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "", 4193 dev->flags & P2P_DEV_NOT_YET_READY ? 4194 "[NOT_YET_READY]" : "", 4195 dev->flags & P2P_DEV_PD_PEER_DISPLAY ? 4196 "[PD_PEER_DISPLAY]" : "", 4197 dev->flags & P2P_DEV_PD_PEER_KEYPAD ? 4198 "[PD_PEER_KEYPAD]" : "", 4199 dev->flags & P2P_DEV_PD_PEER_P2PS ? 4200 "[PD_PEER_P2PS]" : "", 4201 dev->flags & P2P_DEV_USER_REJECTED ? 4202 "[USER_REJECTED]" : "", 4203 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ? 4204 "[PEER_WAITING_RESPONSE]" : "", 4205 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ? 4206 "[PREFER_PERSISTENT_GROUP]" : "", 4207 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ? 4208 "[WAIT_GO_NEG_RESPONSE]" : "", 4209 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ? 4210 "[WAIT_GO_NEG_CONFIRM]" : "", 4211 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ? 4212 "[GROUP_CLIENT_ONLY]" : "", 4213 dev->flags & P2P_DEV_FORCE_FREQ ? 4214 "[FORCE_FREQ]" : "", 4215 dev->flags & P2P_DEV_PD_FOR_JOIN ? 4216 "[PD_FOR_JOIN]" : "", 4217 dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT ? 4218 "[LAST_SEEN_AS_GROUP_CLIENT]" : "", 4219 dev->status, 4220 dev->invitation_reqs); 4221 if (os_snprintf_error(end - pos, res)) 4222 return pos - buf; 4223 pos += res; 4224 4225 if (dev->ext_listen_period) { 4226 res = os_snprintf(pos, end - pos, 4227 "ext_listen_period=%u\n" 4228 "ext_listen_interval=%u\n", 4229 dev->ext_listen_period, 4230 dev->ext_listen_interval); 4231 if (os_snprintf_error(end - pos, res)) 4232 return pos - buf; 4233 pos += res; 4234 } 4235 4236 if (dev->oper_ssid_len) { 4237 res = os_snprintf(pos, end - pos, 4238 "oper_ssid=%s\n", 4239 wpa_ssid_txt(dev->oper_ssid, 4240 dev->oper_ssid_len)); 4241 if (os_snprintf_error(end - pos, res)) 4242 return pos - buf; 4243 pos += res; 4244 } 4245 4246#ifdef CONFIG_WIFI_DISPLAY 4247 if (dev->info.wfd_subelems) { 4248 res = os_snprintf(pos, end - pos, "wfd_subelems="); 4249 if (os_snprintf_error(end - pos, res)) 4250 return pos - buf; 4251 pos += res; 4252 4253 pos += wpa_snprintf_hex(pos, end - pos, 4254 wpabuf_head(dev->info.wfd_subelems), 4255 wpabuf_len(dev->info.wfd_subelems)); 4256 4257 res = os_snprintf(pos, end - pos, "\n"); 4258 if (os_snprintf_error(end - pos, res)) 4259 return pos - buf; 4260 pos += res; 4261 } 4262#endif /* CONFIG_WIFI_DISPLAY */ 4263 4264 return pos - buf; 4265} 4266 4267 4268int p2p_peer_known(struct p2p_data *p2p, const u8 *addr) 4269{ 4270 return p2p_get_device(p2p, addr) != NULL; 4271} 4272 4273 4274void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled) 4275{ 4276 if (enabled) { 4277 p2p_dbg(p2p, "Client discoverability enabled"); 4278 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 4279 } else { 4280 p2p_dbg(p2p, "Client discoverability disabled"); 4281 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 4282 } 4283} 4284 4285 4286static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1, 4287 u32 duration2, u32 interval2) 4288{ 4289 struct wpabuf *req; 4290 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL; 4291 u8 *len; 4292 4293 req = wpabuf_alloc(100); 4294 if (req == NULL) 4295 return NULL; 4296 4297 if (duration1 || interval1) { 4298 os_memset(&desc1, 0, sizeof(desc1)); 4299 desc1.count_type = 1; 4300 desc1.duration = duration1; 4301 desc1.interval = interval1; 4302 ptr1 = &desc1; 4303 4304 if (duration2 || interval2) { 4305 os_memset(&desc2, 0, sizeof(desc2)); 4306 desc2.count_type = 2; 4307 desc2.duration = duration2; 4308 desc2.interval = interval2; 4309 ptr2 = &desc2; 4310 } 4311 } 4312 4313 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1); 4314 len = p2p_buf_add_ie_hdr(req); 4315 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2); 4316 p2p_buf_update_ie_hdr(req, len); 4317 4318 return req; 4319} 4320 4321 4322int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr, 4323 const u8 *own_interface_addr, unsigned int freq, 4324 u32 duration1, u32 interval1, u32 duration2, 4325 u32 interval2) 4326{ 4327 struct wpabuf *req; 4328 4329 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR 4330 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u " 4331 "dur2=%u int2=%u", 4332 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr), 4333 freq, duration1, interval1, duration2, interval2); 4334 4335 req = p2p_build_presence_req(duration1, interval1, duration2, 4336 interval2); 4337 if (req == NULL) 4338 return -1; 4339 4340 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 4341 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr, 4342 go_interface_addr, 4343 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 4344 p2p_dbg(p2p, "Failed to send Action frame"); 4345 } 4346 wpabuf_free(req); 4347 4348 return 0; 4349} 4350 4351 4352static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa, 4353 size_t noa_len, u8 dialog_token) 4354{ 4355 struct wpabuf *resp; 4356 u8 *len; 4357 4358 resp = wpabuf_alloc(100 + noa_len); 4359 if (resp == NULL) 4360 return NULL; 4361 4362 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token); 4363 len = p2p_buf_add_ie_hdr(resp); 4364 p2p_buf_add_status(resp, status); 4365 if (noa) { 4366 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE); 4367 wpabuf_put_le16(resp, noa_len); 4368 wpabuf_put_data(resp, noa, noa_len); 4369 } else 4370 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL); 4371 p2p_buf_update_ie_hdr(resp, len); 4372 4373 return resp; 4374} 4375 4376 4377static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 4378 const u8 *sa, const u8 *data, size_t len, 4379 int rx_freq) 4380{ 4381 struct p2p_message msg; 4382 u8 status; 4383 struct wpabuf *resp; 4384 size_t g; 4385 struct p2p_group *group = NULL; 4386 int parsed = 0; 4387 u8 noa[50]; 4388 int noa_len; 4389 4390 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request"); 4391 4392 for (g = 0; g < p2p->num_groups; g++) { 4393 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]), 4394 ETH_ALEN) == 0) { 4395 group = p2p->groups[g]; 4396 break; 4397 } 4398 } 4399 if (group == NULL) { 4400 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group " 4401 MACSTR, MAC2STR(da)); 4402 return; 4403 } 4404 4405 if (p2p_parse(data, len, &msg) < 0) { 4406 p2p_dbg(p2p, "Failed to parse P2P Presence Request"); 4407 status = P2P_SC_FAIL_INVALID_PARAMS; 4408 goto fail; 4409 } 4410 parsed = 1; 4411 4412 if (msg.noa == NULL) { 4413 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request"); 4414 status = P2P_SC_FAIL_INVALID_PARAMS; 4415 goto fail; 4416 } 4417 4418 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len); 4419 4420fail: 4421 if (p2p->cfg->get_noa) 4422 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa, 4423 sizeof(noa)); 4424 else 4425 noa_len = -1; 4426 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL, 4427 noa_len > 0 ? noa_len : 0, 4428 msg.dialog_token); 4429 if (parsed) 4430 p2p_parse_free(&msg); 4431 if (resp == NULL) 4432 return; 4433 4434 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 4435 if (p2p_send_action(p2p, rx_freq, sa, da, da, 4436 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 4437 p2p_dbg(p2p, "Failed to send Action frame"); 4438 } 4439 wpabuf_free(resp); 4440} 4441 4442 4443static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 4444 const u8 *sa, const u8 *data, size_t len) 4445{ 4446 struct p2p_message msg; 4447 4448 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response"); 4449 4450 if (p2p_parse(data, len, &msg) < 0) { 4451 p2p_dbg(p2p, "Failed to parse P2P Presence Response"); 4452 return; 4453 } 4454 4455 if (msg.status == NULL || msg.noa == NULL) { 4456 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response"); 4457 p2p_parse_free(&msg); 4458 return; 4459 } 4460 4461 if (p2p->cfg->presence_resp) { 4462 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status, 4463 msg.noa, msg.noa_len); 4464 } 4465 4466 if (*msg.status) { 4467 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u", 4468 *msg.status); 4469 p2p_parse_free(&msg); 4470 return; 4471 } 4472 4473 p2p_dbg(p2p, "P2P Presence Request was accepted"); 4474 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA", 4475 msg.noa, msg.noa_len); 4476 /* TODO: process NoA */ 4477 p2p_parse_free(&msg); 4478} 4479 4480 4481static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx) 4482{ 4483 struct p2p_data *p2p = eloop_ctx; 4484 4485 if (p2p->ext_listen_interval) { 4486 /* Schedule next extended listen timeout */ 4487 eloop_register_timeout(p2p->ext_listen_interval_sec, 4488 p2p->ext_listen_interval_usec, 4489 p2p_ext_listen_timeout, p2p, NULL); 4490 } 4491 4492 if ((p2p->cfg->is_p2p_in_progress && 4493 p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) || 4494 (p2p->pending_action_state == P2P_PENDING_PD && 4495 p2p->pd_retries > 0)) { 4496 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)", 4497 p2p_state_txt(p2p->state)); 4498 return; 4499 } 4500 4501 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) { 4502 /* 4503 * This should not really happen, but it looks like the Listen 4504 * command may fail is something else (e.g., a scan) was 4505 * running at an inconvenient time. As a workaround, allow new 4506 * Extended Listen operation to be started. 4507 */ 4508 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again"); 4509 p2p->ext_listen_only = 0; 4510 p2p_set_state(p2p, P2P_IDLE); 4511 } 4512 4513 if (p2p->state != P2P_IDLE) { 4514 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state)); 4515 return; 4516 } 4517 4518 p2p_dbg(p2p, "Extended Listen timeout"); 4519 p2p->ext_listen_only = 1; 4520 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) { 4521 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing"); 4522 p2p->ext_listen_only = 0; 4523 } 4524} 4525 4526 4527int p2p_ext_listen(struct p2p_data *p2p, unsigned int period, 4528 unsigned int interval) 4529{ 4530 if (period > 65535 || interval > 65535 || period > interval || 4531 (period == 0 && interval > 0) || (period > 0 && interval == 0)) { 4532 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u", 4533 period, interval); 4534 return -1; 4535 } 4536 4537 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 4538 4539 if (interval == 0) { 4540 p2p_dbg(p2p, "Disabling Extended Listen Timing"); 4541 p2p->ext_listen_period = 0; 4542 p2p->ext_listen_interval = 0; 4543 return 0; 4544 } 4545 4546 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec", 4547 period, interval); 4548 p2p->ext_listen_period = period; 4549 p2p->ext_listen_interval = interval; 4550 p2p->ext_listen_interval_sec = interval / 1000; 4551 p2p->ext_listen_interval_usec = (interval % 1000) * 1000; 4552 4553 eloop_register_timeout(p2p->ext_listen_interval_sec, 4554 p2p->ext_listen_interval_usec, 4555 p2p_ext_listen_timeout, p2p, NULL); 4556 4557 return 0; 4558} 4559 4560 4561void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 4562 const u8 *ie, size_t ie_len) 4563{ 4564 struct p2p_message msg; 4565 4566 if (bssid == NULL || ie == NULL) 4567 return; 4568 4569 os_memset(&msg, 0, sizeof(msg)); 4570 if (p2p_parse_ies(ie, ie_len, &msg)) 4571 return; 4572 if (msg.minor_reason_code == NULL) { 4573 p2p_parse_free(&msg); 4574 return; 4575 } 4576 4577 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR 4578 " reason_code=%u minor_reason_code=%u", 4579 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4580 4581 p2p_parse_free(&msg); 4582} 4583 4584 4585void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 4586 const u8 *ie, size_t ie_len) 4587{ 4588 struct p2p_message msg; 4589 4590 if (bssid == NULL || ie == NULL) 4591 return; 4592 4593 os_memset(&msg, 0, sizeof(msg)); 4594 if (p2p_parse_ies(ie, ie_len, &msg)) 4595 return; 4596 if (msg.minor_reason_code == NULL) { 4597 p2p_parse_free(&msg); 4598 return; 4599 } 4600 4601 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR 4602 " reason_code=%u minor_reason_code=%u", 4603 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4604 4605 p2p_parse_free(&msg); 4606} 4607 4608 4609void p2p_set_managed_oper(struct p2p_data *p2p, int enabled) 4610{ 4611 if (enabled) { 4612 p2p_dbg(p2p, "Managed P2P Device operations enabled"); 4613 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED; 4614 } else { 4615 p2p_dbg(p2p, "Managed P2P Device operations disabled"); 4616 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED; 4617 } 4618} 4619 4620 4621int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class, 4622 u8 *op_channel) 4623{ 4624 return p2p_channel_random_social(&p2p->channels, op_class, op_channel); 4625} 4626 4627 4628int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel, 4629 u8 forced) 4630{ 4631 if (p2p_channel_to_freq(reg_class, channel) < 0) 4632 return -1; 4633 4634 /* 4635 * Listen channel was set in configuration or set by control interface; 4636 * cannot override it. 4637 */ 4638 if (p2p->cfg->channel_forced && forced == 0) { 4639 p2p_dbg(p2p, 4640 "Listen channel was previously configured - do not override based on optimization"); 4641 return -1; 4642 } 4643 4644 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u", 4645 reg_class, channel); 4646 4647 if (p2p->state == P2P_IDLE) { 4648 p2p->cfg->reg_class = reg_class; 4649 p2p->cfg->channel = channel; 4650 p2p->cfg->channel_forced = forced; 4651 } else { 4652 p2p_dbg(p2p, "Defer setting listen channel"); 4653 p2p->pending_reg_class = reg_class; 4654 p2p->pending_channel = channel; 4655 p2p->pending_channel_forced = forced; 4656 } 4657 4658 return 0; 4659} 4660 4661 4662u8 p2p_get_listen_channel(struct p2p_data *p2p) 4663{ 4664 return p2p->cfg->channel; 4665} 4666 4667 4668int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len) 4669{ 4670 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len)); 4671 if (postfix == NULL) { 4672 p2p->cfg->ssid_postfix_len = 0; 4673 return 0; 4674 } 4675 if (len > sizeof(p2p->cfg->ssid_postfix)) 4676 return -1; 4677 os_memcpy(p2p->cfg->ssid_postfix, postfix, len); 4678 p2p->cfg->ssid_postfix_len = len; 4679 return 0; 4680} 4681 4682 4683int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel, 4684 int cfg_op_channel) 4685{ 4686 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0) 4687 return -1; 4688 4689 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u", 4690 op_reg_class, op_channel); 4691 p2p->cfg->op_reg_class = op_reg_class; 4692 p2p->cfg->op_channel = op_channel; 4693 p2p->cfg->cfg_op_channel = cfg_op_channel; 4694 return 0; 4695} 4696 4697 4698int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan, 4699 const struct p2p_channel *pref_chan) 4700{ 4701 struct p2p_channel *n; 4702 4703 if (pref_chan) { 4704 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel)); 4705 if (n == NULL) 4706 return -1; 4707 os_memcpy(n, pref_chan, 4708 num_pref_chan * sizeof(struct p2p_channel)); 4709 } else 4710 n = NULL; 4711 4712 os_free(p2p->cfg->pref_chan); 4713 p2p->cfg->pref_chan = n; 4714 p2p->cfg->num_pref_chan = num_pref_chan; 4715 4716 return 0; 4717} 4718 4719 4720int p2p_set_no_go_freq(struct p2p_data *p2p, 4721 const struct wpa_freq_range_list *list) 4722{ 4723 struct wpa_freq_range *tmp; 4724 4725 if (list == NULL || list->num == 0) { 4726 os_free(p2p->no_go_freq.range); 4727 p2p->no_go_freq.range = NULL; 4728 p2p->no_go_freq.num = 0; 4729 return 0; 4730 } 4731 4732 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range)); 4733 if (tmp == NULL) 4734 return -1; 4735 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range)); 4736 os_free(p2p->no_go_freq.range); 4737 p2p->no_go_freq.range = tmp; 4738 p2p->no_go_freq.num = list->num; 4739 p2p_dbg(p2p, "Updated no GO chan list"); 4740 4741 return 0; 4742} 4743 4744 4745int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr, 4746 u8 *iface_addr) 4747{ 4748 struct p2p_device *dev = p2p_get_device(p2p, dev_addr); 4749 if (dev == NULL || is_zero_ether_addr(dev->interface_addr)) 4750 return -1; 4751 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN); 4752 return 0; 4753} 4754 4755 4756int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr, 4757 u8 *dev_addr) 4758{ 4759 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4760 if (dev == NULL) 4761 return -1; 4762 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN); 4763 return 0; 4764} 4765 4766 4767void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr) 4768{ 4769 os_memcpy(p2p->peer_filter, addr, ETH_ALEN); 4770 if (is_zero_ether_addr(p2p->peer_filter)) 4771 p2p_dbg(p2p, "Disable peer filter"); 4772 else 4773 p2p_dbg(p2p, "Enable peer filter for " MACSTR, 4774 MAC2STR(p2p->peer_filter)); 4775} 4776 4777 4778void p2p_set_cross_connect(struct p2p_data *p2p, int enabled) 4779{ 4780 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled"); 4781 if (p2p->cross_connect == enabled) 4782 return; 4783 p2p->cross_connect = enabled; 4784 /* TODO: may need to tear down any action group where we are GO(?) */ 4785} 4786 4787 4788int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr) 4789{ 4790 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4791 if (dev == NULL) 4792 return -1; 4793 if (dev->oper_freq <= 0) 4794 return -1; 4795 return dev->oper_freq; 4796} 4797 4798 4799void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled) 4800{ 4801 p2p_dbg(p2p, "Intra BSS distribution %s", 4802 enabled ? "enabled" : "disabled"); 4803 p2p->cfg->p2p_intra_bss = enabled; 4804} 4805 4806 4807void p2p_update_channel_list(struct p2p_data *p2p, 4808 const struct p2p_channels *chan, 4809 const struct p2p_channels *cli_chan) 4810{ 4811 p2p_dbg(p2p, "Update channel list"); 4812 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels)); 4813 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 4814 os_memcpy(&p2p->cfg->cli_channels, cli_chan, 4815 sizeof(struct p2p_channels)); 4816 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 4817} 4818 4819 4820int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 4821 const u8 *src, const u8 *bssid, const u8 *buf, 4822 size_t len, unsigned int wait_time) 4823{ 4824 if (p2p->p2p_scan_running) { 4825 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes"); 4826 if (p2p->after_scan_tx) { 4827 p2p_dbg(p2p, "Dropped previous pending Action frame TX"); 4828 os_free(p2p->after_scan_tx); 4829 } 4830 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) + 4831 len); 4832 if (p2p->after_scan_tx == NULL) 4833 return -1; 4834 p2p->after_scan_tx->freq = freq; 4835 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN); 4836 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN); 4837 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN); 4838 p2p->after_scan_tx->len = len; 4839 p2p->after_scan_tx->wait_time = wait_time; 4840 os_memcpy(p2p->after_scan_tx + 1, buf, len); 4841 return 0; 4842 } 4843 4844 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid, 4845 buf, len, wait_time); 4846} 4847 4848 4849void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5, 4850 int freq_overall) 4851{ 4852 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d", 4853 freq_24, freq_5, freq_overall); 4854 p2p->best_freq_24 = freq_24; 4855 p2p->best_freq_5 = freq_5; 4856 p2p->best_freq_overall = freq_overall; 4857} 4858 4859 4860void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq) 4861{ 4862 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq); 4863 p2p->own_freq_preference = freq; 4864} 4865 4866 4867const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p) 4868{ 4869 if (p2p == NULL || p2p->go_neg_peer == NULL) 4870 return NULL; 4871 return p2p->go_neg_peer->info.p2p_device_addr; 4872} 4873 4874 4875const struct p2p_peer_info * 4876p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next) 4877{ 4878 struct p2p_device *dev; 4879 4880 if (addr) { 4881 dev = p2p_get_device(p2p, addr); 4882 if (!dev) 4883 return NULL; 4884 4885 if (!next) { 4886 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 4887 return NULL; 4888 4889 return &dev->info; 4890 } else { 4891 do { 4892 dev = dl_list_first(&dev->list, 4893 struct p2p_device, 4894 list); 4895 if (!dev || &dev->list == &p2p->devices) 4896 return NULL; 4897 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY); 4898 } 4899 } else { 4900 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4901 if (!dev) 4902 return NULL; 4903 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 4904 dev = dl_list_first(&dev->list, 4905 struct p2p_device, 4906 list); 4907 if (!dev || &dev->list == &p2p->devices) 4908 return NULL; 4909 } 4910 } 4911 4912 return &dev->info; 4913} 4914 4915 4916int p2p_in_progress(struct p2p_data *p2p) 4917{ 4918 if (p2p == NULL) 4919 return 0; 4920 if (p2p->state == P2P_SEARCH) 4921 return 2; 4922 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING; 4923} 4924 4925 4926void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout, 4927 u8 client_timeout) 4928{ 4929 if (p2p) { 4930 p2p->go_timeout = go_timeout; 4931 p2p->client_timeout = client_timeout; 4932 } 4933} 4934 4935 4936#ifdef CONFIG_WIFI_DISPLAY 4937 4938static void p2p_update_wfd_ie_groups(struct p2p_data *p2p) 4939{ 4940 size_t g; 4941 struct p2p_group *group; 4942 4943 for (g = 0; g < p2p->num_groups; g++) { 4944 group = p2p->groups[g]; 4945 p2p_group_force_beacon_update_ies(group); 4946 } 4947} 4948 4949 4950int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie) 4951{ 4952 wpabuf_free(p2p->wfd_ie_beacon); 4953 p2p->wfd_ie_beacon = ie; 4954 p2p_update_wfd_ie_groups(p2p); 4955 return 0; 4956} 4957 4958 4959int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie) 4960{ 4961 wpabuf_free(p2p->wfd_ie_probe_req); 4962 p2p->wfd_ie_probe_req = ie; 4963 return 0; 4964} 4965 4966 4967int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie) 4968{ 4969 wpabuf_free(p2p->wfd_ie_probe_resp); 4970 p2p->wfd_ie_probe_resp = ie; 4971 p2p_update_wfd_ie_groups(p2p); 4972 return 0; 4973} 4974 4975 4976int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie) 4977{ 4978 wpabuf_free(p2p->wfd_ie_assoc_req); 4979 p2p->wfd_ie_assoc_req = ie; 4980 return 0; 4981} 4982 4983 4984int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie) 4985{ 4986 wpabuf_free(p2p->wfd_ie_invitation); 4987 p2p->wfd_ie_invitation = ie; 4988 return 0; 4989} 4990 4991 4992int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie) 4993{ 4994 wpabuf_free(p2p->wfd_ie_prov_disc_req); 4995 p2p->wfd_ie_prov_disc_req = ie; 4996 return 0; 4997} 4998 4999 5000int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie) 5001{ 5002 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 5003 p2p->wfd_ie_prov_disc_resp = ie; 5004 return 0; 5005} 5006 5007 5008int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie) 5009{ 5010 wpabuf_free(p2p->wfd_ie_go_neg); 5011 p2p->wfd_ie_go_neg = ie; 5012 return 0; 5013} 5014 5015 5016int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem) 5017{ 5018 wpabuf_free(p2p->wfd_dev_info); 5019 if (elem) { 5020 p2p->wfd_dev_info = wpabuf_dup(elem); 5021 if (p2p->wfd_dev_info == NULL) 5022 return -1; 5023 } else 5024 p2p->wfd_dev_info = NULL; 5025 5026 return 0; 5027} 5028 5029 5030int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem) 5031{ 5032 wpabuf_free(p2p->wfd_assoc_bssid); 5033 if (elem) { 5034 p2p->wfd_assoc_bssid = wpabuf_dup(elem); 5035 if (p2p->wfd_assoc_bssid == NULL) 5036 return -1; 5037 } else 5038 p2p->wfd_assoc_bssid = NULL; 5039 5040 return 0; 5041} 5042 5043 5044int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p, 5045 const struct wpabuf *elem) 5046{ 5047 wpabuf_free(p2p->wfd_coupled_sink_info); 5048 if (elem) { 5049 p2p->wfd_coupled_sink_info = wpabuf_dup(elem); 5050 if (p2p->wfd_coupled_sink_info == NULL) 5051 return -1; 5052 } else 5053 p2p->wfd_coupled_sink_info = NULL; 5054 5055 return 0; 5056} 5057 5058#endif /* CONFIG_WIFI_DISPLAY */ 5059 5060 5061int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int, 5062 int max_disc_tu) 5063{ 5064 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0) 5065 return -1; 5066 5067 p2p->min_disc_int = min_disc_int; 5068 p2p->max_disc_int = max_disc_int; 5069 p2p->max_disc_tu = max_disc_tu; 5070 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d", 5071 min_disc_int, max_disc_int, max_disc_tu); 5072 5073 return 0; 5074} 5075 5076 5077void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...) 5078{ 5079 va_list ap; 5080 char buf[500]; 5081 5082 if (!p2p->cfg->debug_print) 5083 return; 5084 5085 va_start(ap, fmt); 5086 vsnprintf(buf, sizeof(buf), fmt, ap); 5087 buf[sizeof(buf) - 1] = '\0'; 5088 va_end(ap); 5089 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf); 5090} 5091 5092 5093void p2p_info(struct p2p_data *p2p, const char *fmt, ...) 5094{ 5095 va_list ap; 5096 char buf[500]; 5097 5098 if (!p2p->cfg->debug_print) 5099 return; 5100 5101 va_start(ap, fmt); 5102 vsnprintf(buf, sizeof(buf), fmt, ap); 5103 buf[sizeof(buf) - 1] = '\0'; 5104 va_end(ap); 5105 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf); 5106} 5107 5108 5109void p2p_err(struct p2p_data *p2p, const char *fmt, ...) 5110{ 5111 va_list ap; 5112 char buf[500]; 5113 5114 if (!p2p->cfg->debug_print) 5115 return; 5116 5117 va_start(ap, fmt); 5118 vsnprintf(buf, sizeof(buf), fmt, ap); 5119 buf[sizeof(buf) - 1] = '\0'; 5120 va_end(ap); 5121 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf); 5122} 5123 5124 5125void p2p_loop_on_known_peers(struct p2p_data *p2p, 5126 void (*peer_callback)(struct p2p_peer_info *peer, 5127 void *user_data), 5128 void *user_data) 5129{ 5130 struct p2p_device *dev, *n; 5131 5132 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) { 5133 peer_callback(&dev->info, user_data); 5134 } 5135} 5136 5137 5138#ifdef CONFIG_WPS_NFC 5139 5140static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p, 5141 int client_freq, 5142 const u8 *go_dev_addr, 5143 const u8 *ssid, size_t ssid_len) 5144{ 5145 struct wpabuf *buf; 5146 u8 op_class, channel; 5147 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP; 5148 5149 buf = wpabuf_alloc(1000); 5150 if (buf == NULL) 5151 return NULL; 5152 5153 op_class = p2p->cfg->reg_class; 5154 channel = p2p->cfg->channel; 5155 5156 p2p_buf_add_capability(buf, p2p->dev_capab & 5157 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 5158 p2p_buf_add_device_info(buf, p2p, NULL); 5159 5160 if (p2p->num_groups > 0) { 5161 int freq = p2p_group_get_freq(p2p->groups[0]); 5162 role = P2P_GO_IN_A_GROUP; 5163 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) { 5164 p2p_dbg(p2p, 5165 "Unknown GO operating frequency %d MHz for NFC handover", 5166 freq); 5167 wpabuf_free(buf); 5168 return NULL; 5169 } 5170 } else if (client_freq > 0) { 5171 role = P2P_CLIENT_IN_A_GROUP; 5172 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) { 5173 p2p_dbg(p2p, 5174 "Unknown client operating frequency %d MHz for NFC handover", 5175 client_freq); 5176 wpabuf_free(buf); 5177 return NULL; 5178 } 5179 } 5180 5181 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class, 5182 channel, role); 5183 5184 if (p2p->num_groups > 0) { 5185 /* Limit number of clients to avoid very long message */ 5186 p2p_buf_add_group_info(p2p->groups[0], buf, 5); 5187 p2p_group_buf_add_id(p2p->groups[0], buf); 5188 } else if (client_freq > 0 && 5189 go_dev_addr && !is_zero_ether_addr(go_dev_addr) && 5190 ssid && ssid_len > 0) { 5191 /* 5192 * Add the optional P2P Group ID to indicate in which group this 5193 * device is a P2P Client. 5194 */ 5195 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len); 5196 } 5197 5198 return buf; 5199} 5200 5201 5202struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p, 5203 int client_freq, 5204 const u8 *go_dev_addr, 5205 const u8 *ssid, size_t ssid_len) 5206{ 5207 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 5208 ssid_len); 5209} 5210 5211 5212struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p, 5213 int client_freq, 5214 const u8 *go_dev_addr, 5215 const u8 *ssid, size_t ssid_len) 5216{ 5217 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 5218 ssid_len); 5219} 5220 5221 5222int p2p_process_nfc_connection_handover(struct p2p_data *p2p, 5223 struct p2p_nfc_params *params) 5224{ 5225 struct p2p_message msg; 5226 struct p2p_device *dev; 5227 const u8 *p2p_dev_addr; 5228 int freq; 5229 enum p2p_role_indication role; 5230 5231 params->next_step = NO_ACTION; 5232 5233 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len, 5234 params->p2p_attr, params->p2p_len, &msg)) { 5235 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC"); 5236 p2p_parse_free(&msg); 5237 return -1; 5238 } 5239 5240 if (msg.p2p_device_addr) 5241 p2p_dev_addr = msg.p2p_device_addr; 5242 else if (msg.device_id) 5243 p2p_dev_addr = msg.device_id; 5244 else { 5245 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 5246 p2p_parse_free(&msg); 5247 return -1; 5248 } 5249 5250 if (msg.oob_dev_password) { 5251 os_memcpy(params->oob_dev_pw, msg.oob_dev_password, 5252 msg.oob_dev_password_len); 5253 params->oob_dev_pw_len = msg.oob_dev_password_len; 5254 } 5255 5256 dev = p2p_create_device(p2p, p2p_dev_addr); 5257 if (dev == NULL) { 5258 p2p_parse_free(&msg); 5259 return -1; 5260 } 5261 5262 params->peer = &dev->info; 5263 5264 os_get_reltime(&dev->last_seen); 5265 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 5266 p2p_copy_wps_info(p2p, dev, 0, &msg); 5267 5268 if (!msg.oob_go_neg_channel) { 5269 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included"); 5270 p2p_parse_free(&msg); 5271 return -1; 5272 } 5273 5274 if (msg.oob_go_neg_channel[3] == 0 && 5275 msg.oob_go_neg_channel[4] == 0) 5276 freq = 0; 5277 else 5278 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3], 5279 msg.oob_go_neg_channel[4]); 5280 if (freq < 0) { 5281 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel"); 5282 p2p_parse_free(&msg); 5283 return -1; 5284 } 5285 role = msg.oob_go_neg_channel[5]; 5286 5287 if (role == P2P_GO_IN_A_GROUP) { 5288 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq); 5289 params->go_freq = freq; 5290 } else if (role == P2P_CLIENT_IN_A_GROUP) { 5291 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz", 5292 freq); 5293 params->go_freq = freq; 5294 } else 5295 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq); 5296 dev->oob_go_neg_freq = freq; 5297 5298 if (!params->sel && role != P2P_GO_IN_A_GROUP) { 5299 freq = p2p_channel_to_freq(p2p->cfg->reg_class, 5300 p2p->cfg->channel); 5301 if (freq < 0) { 5302 p2p_dbg(p2p, "Own listen channel not known"); 5303 p2p_parse_free(&msg); 5304 return -1; 5305 } 5306 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq); 5307 dev->oob_go_neg_freq = freq; 5308 } 5309 5310 if (msg.group_id) { 5311 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN); 5312 params->go_ssid_len = msg.group_id_len - ETH_ALEN; 5313 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN, 5314 params->go_ssid_len); 5315 } 5316 5317 if (dev->flags & P2P_DEV_USER_REJECTED) { 5318 p2p_dbg(p2p, "Do not report rejected device"); 5319 p2p_parse_free(&msg); 5320 return 0; 5321 } 5322 5323 if (!(dev->flags & P2P_DEV_REPORTED)) { 5324 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info, 5325 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 5326 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 5327 } 5328 p2p_parse_free(&msg); 5329 5330 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0) 5331 params->next_step = BOTH_GO; 5332 else if (role == P2P_GO_IN_A_GROUP) 5333 params->next_step = JOIN_GROUP; 5334 else if (role == P2P_CLIENT_IN_A_GROUP) { 5335 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 5336 params->next_step = PEER_CLIENT; 5337 } else if (p2p->num_groups > 0) 5338 params->next_step = AUTH_JOIN; 5339 else if (params->sel) 5340 params->next_step = INIT_GO_NEG; 5341 else 5342 params->next_step = RESP_GO_NEG; 5343 5344 return 0; 5345} 5346 5347 5348void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id, 5349 int go_intent, 5350 const u8 *own_interface_addr) 5351{ 5352 5353 p2p->authorized_oob_dev_pw_id = dev_pw_id; 5354 if (dev_pw_id == 0) { 5355 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover"); 5356 return; 5357 } 5358 5359 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover", 5360 dev_pw_id); 5361 5362 p2p->go_intent = go_intent; 5363 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 5364} 5365 5366#endif /* CONFIG_WPS_NFC */ 5367 5368 5369int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len) 5370{ 5371 if (len < 8 || len > 63) 5372 return -1; 5373 p2p->cfg->passphrase_len = len; 5374 return 0; 5375} 5376 5377 5378void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem) 5379{ 5380 p2p->vendor_elem = vendor_elem; 5381} 5382 5383 5384void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx) 5385{ 5386 struct p2p_data *p2p = eloop_ctx; 5387 5388 p2p_dbg(p2p, 5389 "Timeout on waiting peer to become ready for GO Negotiation"); 5390 p2p_go_neg_failed(p2p, -1); 5391} 5392