p2p.c revision 281806
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); 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); 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{ 473 struct p2p_group_info info; 474 size_t c; 475 struct p2p_device *dev; 476 477 if (gi == NULL) 478 return 0; 479 480 if (p2p_group_info_parse(gi, gi_len, &info) < 0) 481 return -1; 482 483 /* 484 * Clear old data for this group; if the devices are still in the 485 * group, the information will be restored in the loop following this. 486 */ 487 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 488 if (os_memcmp(dev->member_in_go_iface, go_interface_addr, 489 ETH_ALEN) == 0) { 490 os_memset(dev->member_in_go_iface, 0, ETH_ALEN); 491 os_memset(dev->member_in_go_dev, 0, ETH_ALEN); 492 } 493 } 494 495 for (c = 0; c < info.num_clients; c++) { 496 struct p2p_client_info *cli = &info.client[c]; 497 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr, 498 ETH_ALEN) == 0) 499 continue; /* ignore our own entry */ 500 dev = p2p_get_device(p2p, cli->p2p_device_addr); 501 if (dev) { 502 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY | 503 P2P_DEV_PROBE_REQ_ONLY)) { 504 /* 505 * Update information since we have not 506 * received this directly from the client. 507 */ 508 p2p_copy_client_info(dev, cli); 509 } else { 510 /* 511 * Need to update P2P Client Discoverability 512 * flag since it is valid only in P2P Group 513 * Info attribute. 514 */ 515 dev->info.dev_capab &= 516 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 517 dev->info.dev_capab |= 518 cli->dev_capab & 519 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 520 } 521 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 522 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 523 } 524 } else { 525 dev = p2p_create_device(p2p, cli->p2p_device_addr); 526 if (dev == NULL) 527 continue; 528 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 529 p2p_copy_client_info(dev, cli); 530 dev->oper_freq = freq; 531 p2p->cfg->dev_found(p2p->cfg->cb_ctx, 532 dev->info.p2p_device_addr, 533 &dev->info, 1); 534 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 535 } 536 537 os_memcpy(dev->interface_addr, cli->p2p_interface_addr, 538 ETH_ALEN); 539 os_get_reltime(&dev->last_seen); 540 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN); 541 os_memcpy(dev->member_in_go_iface, go_interface_addr, 542 ETH_ALEN); 543 } 544 545 return 0; 546} 547 548 549static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev, 550 int probe_req, const struct p2p_message *msg) 551{ 552 os_memcpy(dev->info.device_name, msg->device_name, 553 sizeof(dev->info.device_name)); 554 555 if (msg->manufacturer && 556 msg->manufacturer_len < sizeof(dev->info.manufacturer)) { 557 os_memset(dev->info.manufacturer, 0, 558 sizeof(dev->info.manufacturer)); 559 os_memcpy(dev->info.manufacturer, msg->manufacturer, 560 msg->manufacturer_len); 561 } 562 563 if (msg->model_name && 564 msg->model_name_len < sizeof(dev->info.model_name)) { 565 os_memset(dev->info.model_name, 0, 566 sizeof(dev->info.model_name)); 567 os_memcpy(dev->info.model_name, msg->model_name, 568 msg->model_name_len); 569 } 570 571 if (msg->model_number && 572 msg->model_number_len < sizeof(dev->info.model_number)) { 573 os_memset(dev->info.model_number, 0, 574 sizeof(dev->info.model_number)); 575 os_memcpy(dev->info.model_number, msg->model_number, 576 msg->model_number_len); 577 } 578 579 if (msg->serial_number && 580 msg->serial_number_len < sizeof(dev->info.serial_number)) { 581 os_memset(dev->info.serial_number, 0, 582 sizeof(dev->info.serial_number)); 583 os_memcpy(dev->info.serial_number, msg->serial_number, 584 msg->serial_number_len); 585 } 586 587 if (msg->pri_dev_type) 588 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type, 589 sizeof(dev->info.pri_dev_type)); 590 else if (msg->wps_pri_dev_type) 591 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type, 592 sizeof(dev->info.pri_dev_type)); 593 594 if (msg->wps_sec_dev_type_list) { 595 os_memcpy(dev->info.wps_sec_dev_type_list, 596 msg->wps_sec_dev_type_list, 597 msg->wps_sec_dev_type_list_len); 598 dev->info.wps_sec_dev_type_list_len = 599 msg->wps_sec_dev_type_list_len; 600 } 601 602 if (msg->capability) { 603 /* 604 * P2P Client Discoverability bit is reserved in all frames 605 * that use this function, so do not change its value here. 606 */ 607 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 608 dev->info.dev_capab |= msg->capability[0] & 609 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 610 dev->info.group_capab = msg->capability[1]; 611 } 612 613 if (msg->ext_listen_timing) { 614 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing); 615 dev->ext_listen_interval = 616 WPA_GET_LE16(msg->ext_listen_timing + 2); 617 } 618 619 if (!probe_req) { 620 u16 new_config_methods; 621 new_config_methods = msg->config_methods ? 622 msg->config_methods : msg->wps_config_methods; 623 if (new_config_methods && 624 dev->info.config_methods != new_config_methods) { 625 p2p_dbg(p2p, "Update peer " MACSTR 626 " config_methods 0x%x -> 0x%x", 627 MAC2STR(dev->info.p2p_device_addr), 628 dev->info.config_methods, 629 new_config_methods); 630 dev->info.config_methods = new_config_methods; 631 } 632 } 633} 634 635 636static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies, 637 size_t ies_len) 638{ 639 const u8 *pos, *end; 640 u8 id, len; 641 642 wpabuf_free(dev->info.vendor_elems); 643 dev->info.vendor_elems = NULL; 644 645 end = ies + ies_len; 646 647 for (pos = ies; pos + 1 < end; pos += len) { 648 id = *pos++; 649 len = *pos++; 650 651 if (pos + len > end) 652 break; 653 654 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3) 655 continue; 656 657 if (len >= 4) { 658 u32 type = WPA_GET_BE32(pos); 659 660 if (type == WPA_IE_VENDOR_TYPE || 661 type == WMM_IE_VENDOR_TYPE || 662 type == WPS_IE_VENDOR_TYPE || 663 type == P2P_IE_VENDOR_TYPE || 664 type == WFD_IE_VENDOR_TYPE) 665 continue; 666 } 667 668 /* Unknown vendor element - make raw IE data available */ 669 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0) 670 break; 671 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len); 672 } 673} 674 675 676static int p2p_compare_wfd_info(struct p2p_device *dev, 677 const struct p2p_message *msg) 678{ 679 if (dev->info.wfd_subelems && msg->wfd_subelems) { 680 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used) 681 return 1; 682 683 return os_memcmp(dev->info.wfd_subelems->buf, 684 msg->wfd_subelems->buf, 685 dev->info.wfd_subelems->used); 686 } 687 if (dev->info.wfd_subelems || msg->wfd_subelems) 688 return 1; 689 690 return 0; 691} 692 693 694/** 695 * p2p_add_device - Add peer entries based on scan results or P2P frames 696 * @p2p: P2P module context from p2p_init() 697 * @addr: Source address of Beacon or Probe Response frame (may be either 698 * P2P Device Address or P2P Interface Address) 699 * @level: Signal level (signal strength of the received frame from the peer) 700 * @freq: Frequency on which the Beacon or Probe Response frame was received 701 * @rx_time: Time when the result was received 702 * @ies: IEs from the Beacon or Probe Response frame 703 * @ies_len: Length of ies buffer in octets 704 * @scan_res: Whether this was based on scan results 705 * Returns: 0 on success, -1 on failure 706 * 707 * If the scan result is for a GO, the clients in the group will also be added 708 * to the peer table. This function can also be used with some other frames 709 * like Provision Discovery Request that contains P2P Capability and P2P Device 710 * Info attributes. 711 */ 712int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq, 713 struct os_reltime *rx_time, int level, const u8 *ies, 714 size_t ies_len, int scan_res) 715{ 716 struct p2p_device *dev; 717 struct p2p_message msg; 718 const u8 *p2p_dev_addr; 719 int wfd_changed; 720 int i; 721 struct os_reltime time_now; 722 723 os_memset(&msg, 0, sizeof(msg)); 724 if (p2p_parse_ies(ies, ies_len, &msg)) { 725 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry"); 726 p2p_parse_free(&msg); 727 return -1; 728 } 729 730 if (msg.p2p_device_addr) 731 p2p_dev_addr = msg.p2p_device_addr; 732 else if (msg.device_id) 733 p2p_dev_addr = msg.device_id; 734 else { 735 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 736 p2p_parse_free(&msg); 737 return -1; 738 } 739 740 if (!is_zero_ether_addr(p2p->peer_filter) && 741 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) { 742 p2p_dbg(p2p, "Do not add peer filter for " MACSTR 743 " due to peer filter", MAC2STR(p2p_dev_addr)); 744 p2p_parse_free(&msg); 745 return 0; 746 } 747 748 dev = p2p_create_device(p2p, p2p_dev_addr); 749 if (dev == NULL) { 750 p2p_parse_free(&msg); 751 return -1; 752 } 753 754 if (rx_time == NULL) { 755 os_get_reltime(&time_now); 756 rx_time = &time_now; 757 } 758 759 /* 760 * Update the device entry only if the new peer 761 * entry is newer than the one previously stored. 762 */ 763 if (dev->last_seen.sec > 0 && 764 os_reltime_before(rx_time, &dev->last_seen)) { 765 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)", 766 (unsigned int) rx_time->sec, 767 (unsigned int) rx_time->usec, 768 (unsigned int) dev->last_seen.sec, 769 (unsigned int) dev->last_seen.usec); 770 p2p_parse_free(&msg); 771 return -1; 772 } 773 774 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime)); 775 776 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 777 778 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0) 779 os_memcpy(dev->interface_addr, addr, ETH_ALEN); 780 if (msg.ssid && 781 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 782 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 783 != 0)) { 784 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]); 785 dev->oper_ssid_len = msg.ssid[1]; 786 } 787 788 if (msg.adv_service_instance && msg.adv_service_instance_len) { 789 wpabuf_free(dev->info.p2ps_instance); 790 dev->info.p2ps_instance = wpabuf_alloc_copy( 791 msg.adv_service_instance, msg.adv_service_instance_len); 792 } 793 794 if (freq >= 2412 && freq <= 2484 && msg.ds_params && 795 *msg.ds_params >= 1 && *msg.ds_params <= 14) { 796 int ds_freq; 797 if (*msg.ds_params == 14) 798 ds_freq = 2484; 799 else 800 ds_freq = 2407 + *msg.ds_params * 5; 801 if (freq != ds_freq) { 802 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz", 803 freq, ds_freq); 804 freq = ds_freq; 805 } 806 } 807 808 if (dev->listen_freq && dev->listen_freq != freq && scan_res) { 809 p2p_dbg(p2p, "Update Listen frequency based on scan results (" 810 MACSTR " %d -> %d MHz (DS param %d)", 811 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq, 812 freq, msg.ds_params ? *msg.ds_params : -1); 813 } 814 if (scan_res) { 815 dev->listen_freq = freq; 816 if (msg.group_info) 817 dev->oper_freq = freq; 818 } 819 dev->info.level = level; 820 821 p2p_copy_wps_info(p2p, dev, 0, &msg); 822 823 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 824 wpabuf_free(dev->info.wps_vendor_ext[i]); 825 dev->info.wps_vendor_ext[i] = NULL; 826 } 827 828 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 829 if (msg.wps_vendor_ext[i] == NULL) 830 break; 831 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy( 832 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]); 833 if (dev->info.wps_vendor_ext[i] == NULL) 834 break; 835 } 836 837 wfd_changed = p2p_compare_wfd_info(dev, &msg); 838 839 if (msg.wfd_subelems) { 840 wpabuf_free(dev->info.wfd_subelems); 841 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 842 } 843 844 if (scan_res) { 845 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq, 846 msg.group_info, msg.group_info_len); 847 } 848 849 p2p_parse_free(&msg); 850 851 p2p_update_peer_vendor_elems(dev, ies, ies_len); 852 853 if (dev->flags & P2P_DEV_REPORTED && !wfd_changed && 854 (!msg.adv_service_instance || 855 (dev->flags & P2P_DEV_P2PS_REPORTED))) 856 return 0; 857 858 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)", 859 freq, (unsigned int) rx_time->sec, 860 (unsigned int) rx_time->usec); 861 if (dev->flags & P2P_DEV_USER_REJECTED) { 862 p2p_dbg(p2p, "Do not report rejected device"); 863 return 0; 864 } 865 866 if (dev->info.config_methods == 0 && 867 (freq == 2412 || freq == 2437 || freq == 2462)) { 868 /* 869 * If we have only seen a Beacon frame from a GO, we do not yet 870 * know what WPS config methods it supports. Since some 871 * applications use config_methods value from P2P-DEVICE-FOUND 872 * events, postpone reporting this peer until we've fully 873 * discovered its capabilities. 874 * 875 * At least for now, do this only if the peer was detected on 876 * one of the social channels since that peer can be easily be 877 * found again and there are no limitations of having to use 878 * passive scan on this channels, so this can be done through 879 * Probe Response frame that includes the config_methods 880 * information. 881 */ 882 p2p_dbg(p2p, "Do not report peer " MACSTR 883 " with unknown config methods", MAC2STR(addr)); 884 return 0; 885 } 886 887 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 888 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 889 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 890 891 if (msg.adv_service_instance) 892 dev->flags |= P2P_DEV_P2PS_REPORTED; 893 894 return 0; 895} 896 897 898static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev) 899{ 900 int i; 901 902 if (p2p->go_neg_peer == dev) { 903 /* 904 * If GO Negotiation is in progress, report that it has failed. 905 */ 906 p2p_go_neg_failed(p2p, -1); 907 } 908 if (p2p->invite_peer == dev) 909 p2p->invite_peer = NULL; 910 if (p2p->sd_peer == dev) 911 p2p->sd_peer = NULL; 912 if (p2p->pending_client_disc_go == dev) 913 p2p->pending_client_disc_go = NULL; 914 915 /* dev_lost() device, but only if it was previously dev_found() */ 916 if (dev->flags & P2P_DEV_REPORTED_ONCE) 917 p2p->cfg->dev_lost(p2p->cfg->cb_ctx, 918 dev->info.p2p_device_addr); 919 920 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 921 wpabuf_free(dev->info.wps_vendor_ext[i]); 922 dev->info.wps_vendor_ext[i] = NULL; 923 } 924 925 wpabuf_free(dev->info.wfd_subelems); 926 wpabuf_free(dev->info.vendor_elems); 927 wpabuf_free(dev->go_neg_conf); 928 wpabuf_free(dev->info.p2ps_instance); 929 930 os_free(dev); 931} 932 933 934static int p2p_get_next_prog_freq(struct p2p_data *p2p) 935{ 936 struct p2p_channels *c; 937 struct p2p_reg_class *cla; 938 size_t cl, ch; 939 int found = 0; 940 u8 reg_class; 941 u8 channel; 942 int freq; 943 944 c = &p2p->cfg->channels; 945 for (cl = 0; cl < c->reg_classes; cl++) { 946 cla = &c->reg_class[cl]; 947 if (cla->reg_class != p2p->last_prog_scan_class) 948 continue; 949 for (ch = 0; ch < cla->channels; ch++) { 950 if (cla->channel[ch] == p2p->last_prog_scan_chan) { 951 found = 1; 952 break; 953 } 954 } 955 if (found) 956 break; 957 } 958 959 if (!found) { 960 /* Start from beginning */ 961 reg_class = c->reg_class[0].reg_class; 962 channel = c->reg_class[0].channel[0]; 963 } else { 964 /* Pick the next channel */ 965 ch++; 966 if (ch == cla->channels) { 967 cl++; 968 if (cl == c->reg_classes) 969 cl = 0; 970 ch = 0; 971 } 972 reg_class = c->reg_class[cl].reg_class; 973 channel = c->reg_class[cl].channel[ch]; 974 } 975 976 freq = p2p_channel_to_freq(reg_class, channel); 977 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz", 978 reg_class, channel, freq); 979 p2p->last_prog_scan_class = reg_class; 980 p2p->last_prog_scan_chan = channel; 981 982 if (freq == 2412 || freq == 2437 || freq == 2462) 983 return 0; /* No need to add social channels */ 984 return freq; 985} 986 987 988static void p2p_search(struct p2p_data *p2p) 989{ 990 int freq = 0; 991 enum p2p_scan_type type; 992 u16 pw_id = DEV_PW_DEFAULT; 993 int res; 994 995 if (p2p->drv_in_listen) { 996 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing"); 997 return; 998 } 999 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1000 1001 if (p2p->find_type == P2P_FIND_PROGRESSIVE && 1002 (freq = p2p_get_next_prog_freq(p2p)) > 0) { 1003 type = P2P_SCAN_SOCIAL_PLUS_ONE; 1004 p2p_dbg(p2p, "Starting search (+ freq %u)", freq); 1005 } else { 1006 type = P2P_SCAN_SOCIAL; 1007 p2p_dbg(p2p, "Starting search"); 1008 } 1009 1010 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq, 1011 p2p->num_req_dev_types, p2p->req_dev_types, 1012 p2p->find_dev_id, pw_id); 1013 if (res < 0) { 1014 p2p_dbg(p2p, "Scan request schedule failed"); 1015 p2p_continue_find(p2p); 1016 } 1017} 1018 1019 1020static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx) 1021{ 1022 struct p2p_data *p2p = eloop_ctx; 1023 p2p_dbg(p2p, "Find timeout -> stop"); 1024 p2p_stop_find(p2p); 1025} 1026 1027 1028void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status) 1029{ 1030 if (status != 0) { 1031 p2p_dbg(p2p, "Scan request failed"); 1032 /* Do continue find even for the first p2p_find_scan */ 1033 p2p_continue_find(p2p); 1034 } else { 1035 p2p_dbg(p2p, "Running p2p_scan"); 1036 p2p->p2p_scan_running = 1; 1037 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 1038 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 1039 p2p, NULL); 1040 } 1041} 1042 1043 1044static int p2p_run_after_scan(struct p2p_data *p2p) 1045{ 1046 struct p2p_device *dev; 1047 enum p2p_after_scan op; 1048 1049 if (p2p->after_scan_tx) { 1050 p2p->after_scan_tx_in_progress = 1; 1051 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion"); 1052 p2p->cfg->send_action(p2p->cfg->cb_ctx, 1053 p2p->after_scan_tx->freq, 1054 p2p->after_scan_tx->dst, 1055 p2p->after_scan_tx->src, 1056 p2p->after_scan_tx->bssid, 1057 (u8 *) (p2p->after_scan_tx + 1), 1058 p2p->after_scan_tx->len, 1059 p2p->after_scan_tx->wait_time); 1060 os_free(p2p->after_scan_tx); 1061 p2p->after_scan_tx = NULL; 1062 return 1; 1063 } 1064 1065 op = p2p->start_after_scan; 1066 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1067 switch (op) { 1068 case P2P_AFTER_SCAN_NOTHING: 1069 break; 1070 case P2P_AFTER_SCAN_LISTEN: 1071 p2p_dbg(p2p, "Start previously requested Listen state"); 1072 p2p_listen(p2p, p2p->pending_listen_sec * 1000 + 1073 p2p->pending_listen_usec / 1000); 1074 return 1; 1075 case P2P_AFTER_SCAN_CONNECT: 1076 p2p_dbg(p2p, "Start previously requested connect with " MACSTR, 1077 MAC2STR(p2p->after_scan_peer)); 1078 dev = p2p_get_device(p2p, p2p->after_scan_peer); 1079 if (dev == NULL) { 1080 p2p_dbg(p2p, "Peer not known anymore"); 1081 break; 1082 } 1083 p2p_connect_send(p2p, dev); 1084 return 1; 1085 } 1086 1087 return 0; 1088} 1089 1090 1091static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx) 1092{ 1093 struct p2p_data *p2p = eloop_ctx; 1094 int running; 1095 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running); 1096 running = p2p->p2p_scan_running; 1097 /* Make sure we recover from missed scan results callback */ 1098 p2p->p2p_scan_running = 0; 1099 1100 if (running) 1101 p2p_run_after_scan(p2p); 1102} 1103 1104 1105static void p2p_free_req_dev_types(struct p2p_data *p2p) 1106{ 1107 p2p->num_req_dev_types = 0; 1108 os_free(p2p->req_dev_types); 1109 p2p->req_dev_types = NULL; 1110} 1111 1112 1113static int p2ps_gen_hash(struct p2p_data *p2p, const char *str, u8 *hash) 1114{ 1115 u8 buf[SHA256_MAC_LEN]; 1116 char str_buf[256]; 1117 const u8 *adv_array; 1118 size_t i, adv_len; 1119 1120 if (!str || !hash) 1121 return 0; 1122 1123 if (!str[0]) { 1124 os_memcpy(hash, p2p->wild_card_hash, P2PS_HASH_LEN); 1125 return 1; 1126 } 1127 1128 adv_array = (u8 *) str_buf; 1129 adv_len = os_strlen(str); 1130 1131 for (i = 0; str[i] && i < adv_len; i++) { 1132 if (str[i] >= 'A' && str[i] <= 'Z') 1133 str_buf[i] = str[i] - 'A' + 'a'; 1134 else 1135 str_buf[i] = str[i]; 1136 } 1137 1138 if (sha256_vector(1, &adv_array, &adv_len, buf)) 1139 return 0; 1140 1141 os_memcpy(hash, buf, P2PS_HASH_LEN); 1142 return 1; 1143} 1144 1145 1146int p2p_find(struct p2p_data *p2p, unsigned int timeout, 1147 enum p2p_discovery_type type, 1148 unsigned int num_req_dev_types, const u8 *req_dev_types, 1149 const u8 *dev_id, unsigned int search_delay, 1150 u8 seek_count, const char **seek, int freq) 1151{ 1152 int res; 1153 1154 p2p_dbg(p2p, "Starting find (type=%d)", type); 1155 os_get_reltime(&p2p->find_start); 1156 if (p2p->p2p_scan_running) { 1157 p2p_dbg(p2p, "p2p_scan is already running"); 1158 } 1159 1160 p2p_free_req_dev_types(p2p); 1161 if (req_dev_types && num_req_dev_types) { 1162 p2p->req_dev_types = os_malloc(num_req_dev_types * 1163 WPS_DEV_TYPE_LEN); 1164 if (p2p->req_dev_types == NULL) 1165 return -1; 1166 os_memcpy(p2p->req_dev_types, req_dev_types, 1167 num_req_dev_types * WPS_DEV_TYPE_LEN); 1168 p2p->num_req_dev_types = num_req_dev_types; 1169 } 1170 1171 if (dev_id) { 1172 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN); 1173 p2p->find_dev_id = p2p->find_dev_id_buf; 1174 } else 1175 p2p->find_dev_id = NULL; 1176 1177 if (seek_count == 0 || !seek) { 1178 /* Not an ASP search */ 1179 p2p->p2ps_seek = 0; 1180 } else if (seek_count == 1 && seek && (!seek[0] || !seek[0][0])) { 1181 /* 1182 * An empty seek string means no hash values, but still an ASP 1183 * search. 1184 */ 1185 p2p->p2ps_seek_count = 0; 1186 p2p->p2ps_seek = 1; 1187 } else if (seek && seek_count <= P2P_MAX_QUERY_HASH) { 1188 u8 buf[P2PS_HASH_LEN]; 1189 int i; 1190 1191 p2p->p2ps_seek_count = seek_count; 1192 for (i = 0; i < seek_count; i++) { 1193 if (!p2ps_gen_hash(p2p, seek[i], buf)) 1194 continue; 1195 1196 /* If asking for wildcard, don't do others */ 1197 if (os_memcmp(buf, p2p->wild_card_hash, 1198 P2PS_HASH_LEN) == 0) { 1199 p2p->p2ps_seek_count = 0; 1200 break; 1201 } 1202 1203 os_memcpy(&p2p->query_hash[i * P2PS_HASH_LEN], buf, 1204 P2PS_HASH_LEN); 1205 } 1206 p2p->p2ps_seek = 1; 1207 } else { 1208 p2p->p2ps_seek_count = 0; 1209 p2p->p2ps_seek = 1; 1210 } 1211 1212 /* Special case to perform wildcard search */ 1213 if (p2p->p2ps_seek_count == 0 && p2p->p2ps_seek) { 1214 p2p->p2ps_seek_count = 1; 1215 os_memcpy(&p2p->query_hash, p2p->wild_card_hash, P2PS_HASH_LEN); 1216 } 1217 1218 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1219 p2p_clear_timeout(p2p); 1220 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1221 p2p->find_type = type; 1222 p2p_device_clear_reported(p2p); 1223 p2p_set_state(p2p, P2P_SEARCH); 1224 p2p->search_delay = search_delay; 1225 p2p->in_search_delay = 0; 1226 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1227 p2p->last_p2p_find_timeout = timeout; 1228 if (timeout) 1229 eloop_register_timeout(timeout, 0, p2p_find_timeout, 1230 p2p, NULL); 1231 switch (type) { 1232 case P2P_FIND_START_WITH_FULL: 1233 if (freq > 0) { 1234 /* 1235 * Start with the specified channel and then move to 1236 * social channels only scans. 1237 */ 1238 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, 1239 P2P_SCAN_SPECIFIC, freq, 1240 p2p->num_req_dev_types, 1241 p2p->req_dev_types, dev_id, 1242 DEV_PW_DEFAULT); 1243 break; 1244 } 1245 /* fall through */ 1246 case P2P_FIND_PROGRESSIVE: 1247 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0, 1248 p2p->num_req_dev_types, 1249 p2p->req_dev_types, dev_id, 1250 DEV_PW_DEFAULT); 1251 break; 1252 case P2P_FIND_ONLY_SOCIAL: 1253 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0, 1254 p2p->num_req_dev_types, 1255 p2p->req_dev_types, dev_id, 1256 DEV_PW_DEFAULT); 1257 break; 1258 default: 1259 return -1; 1260 } 1261 1262 if (res != 0 && p2p->p2p_scan_running) { 1263 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running"); 1264 /* wait for the previous p2p_scan to complete */ 1265 res = 0; /* do not report failure */ 1266 } else if (res != 0) { 1267 p2p_dbg(p2p, "Failed to start p2p_scan"); 1268 p2p_set_state(p2p, P2P_IDLE); 1269 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1270 } 1271 1272 return res; 1273} 1274 1275 1276void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq) 1277{ 1278 p2p_dbg(p2p, "Stopping find"); 1279 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1280 p2p_clear_timeout(p2p); 1281 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND) 1282 p2p->cfg->find_stopped(p2p->cfg->cb_ctx); 1283 1284 p2p->p2ps_seek_count = 0; 1285 1286 p2p_set_state(p2p, P2P_IDLE); 1287 p2p_free_req_dev_types(p2p); 1288 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1289 if (p2p->go_neg_peer) 1290 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1291 p2p->go_neg_peer = NULL; 1292 p2p->sd_peer = NULL; 1293 p2p->invite_peer = NULL; 1294 p2p_stop_listen_for_freq(p2p, freq); 1295 p2p->send_action_in_progress = 0; 1296} 1297 1298 1299void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq) 1300{ 1301 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) { 1302 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response"); 1303 return; 1304 } 1305 if (p2p->in_listen) { 1306 p2p->in_listen = 0; 1307 p2p_clear_timeout(p2p); 1308 } 1309 if (p2p->drv_in_listen) { 1310 /* 1311 * The driver may not deliver callback to p2p_listen_end() 1312 * when the operation gets canceled, so clear the internal 1313 * variable that is tracking driver state. 1314 */ 1315 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen); 1316 p2p->drv_in_listen = 0; 1317 } 1318 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1319} 1320 1321 1322void p2p_stop_listen(struct p2p_data *p2p) 1323{ 1324 if (p2p->state != P2P_LISTEN_ONLY) { 1325 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state."); 1326 return; 1327 } 1328 1329 p2p_stop_listen_for_freq(p2p, 0); 1330 p2p_set_state(p2p, P2P_IDLE); 1331} 1332 1333 1334void p2p_stop_find(struct p2p_data *p2p) 1335{ 1336 p2p->pending_listen_freq = 0; 1337 p2p_stop_find_for_freq(p2p, 0); 1338} 1339 1340 1341static int p2p_prepare_channel_pref(struct p2p_data *p2p, 1342 unsigned int force_freq, 1343 unsigned int pref_freq, int go) 1344{ 1345 u8 op_class, op_channel; 1346 unsigned int freq = force_freq ? force_freq : pref_freq; 1347 1348 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d", 1349 force_freq, pref_freq, go); 1350 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) { 1351 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq); 1352 return -1; 1353 } 1354 1355 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) && 1356 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class, 1357 op_channel))) { 1358 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P", 1359 freq, op_class, op_channel); 1360 return -1; 1361 } 1362 1363 p2p->op_reg_class = op_class; 1364 p2p->op_channel = op_channel; 1365 1366 if (force_freq) { 1367 p2p->channels.reg_classes = 1; 1368 p2p->channels.reg_class[0].channels = 1; 1369 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 1370 p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 1371 } else { 1372 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1373 sizeof(struct p2p_channels)); 1374 } 1375 1376 return 0; 1377} 1378 1379 1380static void p2p_prepare_channel_best(struct p2p_data *p2p) 1381{ 1382 u8 op_class, op_channel; 1383 const int op_classes_5ghz[] = { 124, 115, 0 }; 1384 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 }; 1385 const int op_classes_vht[] = { 128, 0 }; 1386 1387 p2p_dbg(p2p, "Prepare channel best"); 1388 1389 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 && 1390 p2p_supported_freq(p2p, p2p->best_freq_overall) && 1391 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel) 1392 == 0) { 1393 p2p_dbg(p2p, "Select best overall channel as operating channel preference"); 1394 p2p->op_reg_class = op_class; 1395 p2p->op_channel = op_channel; 1396 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 && 1397 p2p_supported_freq(p2p, p2p->best_freq_5) && 1398 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel) 1399 == 0) { 1400 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference"); 1401 p2p->op_reg_class = op_class; 1402 p2p->op_channel = op_channel; 1403 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 && 1404 p2p_supported_freq(p2p, p2p->best_freq_24) && 1405 p2p_freq_to_channel(p2p->best_freq_24, &op_class, 1406 &op_channel) == 0) { 1407 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference"); 1408 p2p->op_reg_class = op_class; 1409 p2p->op_channel = op_channel; 1410 } else if (p2p->cfg->num_pref_chan > 0 && 1411 p2p_channels_includes(&p2p->cfg->channels, 1412 p2p->cfg->pref_chan[0].op_class, 1413 p2p->cfg->pref_chan[0].chan)) { 1414 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference"); 1415 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class; 1416 p2p->op_channel = p2p->cfg->pref_chan[0].chan; 1417 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht, 1418 &p2p->op_reg_class, &p2p->op_channel) == 1419 0) { 1420 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference", 1421 p2p->op_reg_class, p2p->op_channel); 1422 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40, 1423 &p2p->op_reg_class, &p2p->op_channel) == 1424 0) { 1425 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference", 1426 p2p->op_reg_class, p2p->op_channel); 1427 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz, 1428 &p2p->op_reg_class, &p2p->op_channel) == 1429 0) { 1430 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference", 1431 p2p->op_reg_class, p2p->op_channel); 1432 } else if (p2p_channels_includes(&p2p->cfg->channels, 1433 p2p->cfg->op_reg_class, 1434 p2p->cfg->op_channel)) { 1435 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference"); 1436 p2p->op_reg_class = p2p->cfg->op_reg_class; 1437 p2p->op_channel = p2p->cfg->op_channel; 1438 } else if (p2p_channel_random_social(&p2p->cfg->channels, 1439 &p2p->op_reg_class, 1440 &p2p->op_channel) == 0) { 1441 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference", 1442 p2p->op_reg_class, p2p->op_channel); 1443 } else { 1444 /* Select any random available channel from the first available 1445 * operating class */ 1446 p2p_channel_select(&p2p->cfg->channels, NULL, 1447 &p2p->op_reg_class, 1448 &p2p->op_channel); 1449 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference", 1450 p2p->op_channel, p2p->op_reg_class); 1451 } 1452 1453 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1454 sizeof(struct p2p_channels)); 1455} 1456 1457 1458/** 1459 * p2p_prepare_channel - Select operating channel for GO Negotiation 1460 * @p2p: P2P module context from p2p_init() 1461 * @dev: Selected peer device 1462 * @force_freq: Forced frequency in MHz or 0 if not forced 1463 * @pref_freq: Preferred frequency in MHz or 0 if no preference 1464 * @go: Whether the local end will be forced to be GO 1465 * Returns: 0 on success, -1 on failure (channel not supported for P2P) 1466 * 1467 * This function is used to do initial operating channel selection for GO 1468 * Negotiation prior to having received peer information. The selected channel 1469 * may be further optimized in p2p_reselect_channel() once the peer information 1470 * is available. 1471 */ 1472int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev, 1473 unsigned int force_freq, unsigned int pref_freq, int go) 1474{ 1475 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d", 1476 force_freq, pref_freq, go); 1477 if (force_freq || pref_freq) { 1478 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) < 1479 0) 1480 return -1; 1481 } else { 1482 p2p_prepare_channel_best(p2p); 1483 } 1484 p2p_channels_dump(p2p, "prepared channels", &p2p->channels); 1485 if (go) 1486 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq); 1487 else if (!force_freq) 1488 p2p_channels_union_inplace(&p2p->channels, 1489 &p2p->cfg->cli_channels); 1490 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels); 1491 1492 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s", 1493 p2p->op_reg_class, p2p->op_channel, 1494 force_freq ? " (forced)" : ""); 1495 1496 if (force_freq) 1497 dev->flags |= P2P_DEV_FORCE_FREQ; 1498 else 1499 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1500 1501 return 0; 1502} 1503 1504 1505static void p2p_set_dev_persistent(struct p2p_device *dev, 1506 int persistent_group) 1507{ 1508 switch (persistent_group) { 1509 case 0: 1510 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP | 1511 P2P_DEV_PREFER_PERSISTENT_RECONN); 1512 break; 1513 case 1: 1514 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP; 1515 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN; 1516 break; 1517 case 2: 1518 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP | 1519 P2P_DEV_PREFER_PERSISTENT_RECONN; 1520 break; 1521 } 1522} 1523 1524 1525int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr, 1526 enum p2p_wps_method wps_method, 1527 int go_intent, const u8 *own_interface_addr, 1528 unsigned int force_freq, int persistent_group, 1529 const u8 *force_ssid, size_t force_ssid_len, 1530 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id) 1531{ 1532 struct p2p_device *dev; 1533 1534 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR 1535 " GO Intent=%d Intended Interface Address=" MACSTR 1536 " wps_method=%d persistent_group=%d pd_before_go_neg=%d " 1537 "oob_pw_id=%u", 1538 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1539 wps_method, persistent_group, pd_before_go_neg, oob_pw_id); 1540 1541 dev = p2p_get_device(p2p, peer_addr); 1542 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 1543 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR, 1544 MAC2STR(peer_addr)); 1545 return -1; 1546 } 1547 1548 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, 1549 go_intent == 15) < 0) 1550 return -1; 1551 1552 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 1553 if (!(dev->info.dev_capab & 1554 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 1555 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1556 " that is in a group and is not discoverable", 1557 MAC2STR(peer_addr)); 1558 return -1; 1559 } 1560 if (dev->oper_freq <= 0) { 1561 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1562 " with incomplete information", 1563 MAC2STR(peer_addr)); 1564 return -1; 1565 } 1566 1567 /* 1568 * First, try to connect directly. If the peer does not 1569 * acknowledge frames, assume it is sleeping and use device 1570 * discoverability via the GO at that point. 1571 */ 1572 } 1573 1574 p2p->ssid_set = 0; 1575 if (force_ssid) { 1576 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1577 force_ssid, force_ssid_len); 1578 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1579 p2p->ssid_len = force_ssid_len; 1580 p2p->ssid_set = 1; 1581 } 1582 1583 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1584 dev->flags &= ~P2P_DEV_USER_REJECTED; 1585 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 1586 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1587 if (pd_before_go_neg) 1588 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG; 1589 else { 1590 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG; 1591 /* 1592 * Assign dialog token and tie breaker here to use the same 1593 * values in each retry within the same GO Negotiation exchange. 1594 */ 1595 dev->dialog_token++; 1596 if (dev->dialog_token == 0) 1597 dev->dialog_token = 1; 1598 dev->tie_breaker = p2p->next_tie_breaker; 1599 p2p->next_tie_breaker = !p2p->next_tie_breaker; 1600 } 1601 dev->connect_reqs = 0; 1602 dev->go_neg_req_sent = 0; 1603 dev->go_state = UNKNOWN_GO; 1604 p2p_set_dev_persistent(dev, persistent_group); 1605 p2p->go_intent = go_intent; 1606 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1607 1608 if (p2p->state != P2P_IDLE) 1609 p2p_stop_find(p2p); 1610 1611 if (p2p->after_scan_tx) { 1612 /* 1613 * We need to drop the pending frame to avoid issues with the 1614 * new GO Negotiation, e.g., when the pending frame was from a 1615 * previous attempt at starting a GO Negotiation. 1616 */ 1617 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion"); 1618 os_free(p2p->after_scan_tx); 1619 p2p->after_scan_tx = NULL; 1620 } 1621 1622 dev->wps_method = wps_method; 1623 dev->oob_pw_id = oob_pw_id; 1624 dev->status = P2P_SC_SUCCESS; 1625 1626 if (p2p->p2p_scan_running) { 1627 p2p_dbg(p2p, "p2p_scan running - delay connect send"); 1628 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT; 1629 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN); 1630 return 0; 1631 } 1632 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1633 1634 return p2p_connect_send(p2p, dev); 1635} 1636 1637 1638int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr, 1639 enum p2p_wps_method wps_method, 1640 int go_intent, const u8 *own_interface_addr, 1641 unsigned int force_freq, int persistent_group, 1642 const u8 *force_ssid, size_t force_ssid_len, 1643 unsigned int pref_freq, u16 oob_pw_id) 1644{ 1645 struct p2p_device *dev; 1646 1647 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR 1648 " GO Intent=%d Intended Interface Address=" MACSTR 1649 " wps_method=%d persistent_group=%d oob_pw_id=%u", 1650 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1651 wps_method, persistent_group, oob_pw_id); 1652 1653 dev = p2p_get_device(p2p, peer_addr); 1654 if (dev == NULL) { 1655 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR, 1656 MAC2STR(peer_addr)); 1657 return -1; 1658 } 1659 1660 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent == 1661 15) < 0) 1662 return -1; 1663 1664 p2p->ssid_set = 0; 1665 if (force_ssid) { 1666 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1667 force_ssid, force_ssid_len); 1668 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1669 p2p->ssid_len = force_ssid_len; 1670 p2p->ssid_set = 1; 1671 } 1672 1673 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1674 dev->flags &= ~P2P_DEV_USER_REJECTED; 1675 dev->go_neg_req_sent = 0; 1676 dev->go_state = UNKNOWN_GO; 1677 p2p_set_dev_persistent(dev, persistent_group); 1678 p2p->go_intent = go_intent; 1679 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1680 1681 dev->wps_method = wps_method; 1682 dev->oob_pw_id = oob_pw_id; 1683 dev->status = P2P_SC_SUCCESS; 1684 1685 return 0; 1686} 1687 1688 1689void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr, 1690 struct p2p_device *dev, struct p2p_message *msg) 1691{ 1692 os_get_reltime(&dev->last_seen); 1693 1694 p2p_copy_wps_info(p2p, dev, 0, msg); 1695 1696 if (msg->listen_channel) { 1697 int freq; 1698 freq = p2p_channel_to_freq(msg->listen_channel[3], 1699 msg->listen_channel[4]); 1700 if (freq < 0) { 1701 p2p_dbg(p2p, "Unknown peer Listen channel: " 1702 "country=%c%c(0x%02x) reg_class=%u channel=%u", 1703 msg->listen_channel[0], 1704 msg->listen_channel[1], 1705 msg->listen_channel[2], 1706 msg->listen_channel[3], 1707 msg->listen_channel[4]); 1708 } else { 1709 p2p_dbg(p2p, "Update peer " MACSTR 1710 " Listen channel: %u -> %u MHz", 1711 MAC2STR(dev->info.p2p_device_addr), 1712 dev->listen_freq, freq); 1713 dev->listen_freq = freq; 1714 } 1715 } 1716 1717 if (msg->wfd_subelems) { 1718 wpabuf_free(dev->info.wfd_subelems); 1719 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems); 1720 } 1721 1722 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 1723 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 1724 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request"); 1725 } else { 1726 p2p_dbg(p2p, "Created device entry based on GO Neg Req: " 1727 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' " 1728 "listen_freq=%d", 1729 MAC2STR(dev->info.p2p_device_addr), 1730 dev->info.dev_capab, dev->info.group_capab, 1731 dev->info.device_name, dev->listen_freq); 1732 } 1733 1734 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY; 1735 1736 if (dev->flags & P2P_DEV_USER_REJECTED) { 1737 p2p_dbg(p2p, "Do not report rejected device"); 1738 return; 1739 } 1740 1741 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 1742 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 1743 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 1744} 1745 1746 1747void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len) 1748{ 1749 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 1750 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2); 1751 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2], 1752 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len); 1753 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len; 1754} 1755 1756 1757int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params) 1758{ 1759 if (p2p->ssid_set) { 1760 os_memcpy(params->ssid, p2p->ssid, p2p->ssid_len); 1761 params->ssid_len = p2p->ssid_len; 1762 } else { 1763 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len); 1764 } 1765 p2p->ssid_set = 0; 1766 1767 p2p_random(params->passphrase, p2p->cfg->passphrase_len); 1768 return 0; 1769} 1770 1771 1772void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer) 1773{ 1774 struct p2p_go_neg_results res; 1775 int go = peer->go_state == LOCAL_GO; 1776 struct p2p_channels intersection; 1777 1778 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)", 1779 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer"); 1780 1781 os_memset(&res, 0, sizeof(res)); 1782 res.role_go = go; 1783 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 1784 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 1785 res.wps_method = peer->wps_method; 1786 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 1787 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 1788 res.persistent_group = 2; 1789 else 1790 res.persistent_group = 1; 1791 } 1792 1793 if (go) { 1794 /* Setup AP mode for WPS provisioning */ 1795 res.freq = p2p_channel_to_freq(p2p->op_reg_class, 1796 p2p->op_channel); 1797 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1798 res.ssid_len = p2p->ssid_len; 1799 p2p_random(res.passphrase, p2p->cfg->passphrase_len); 1800 } else { 1801 res.freq = peer->oper_freq; 1802 if (p2p->ssid_len) { 1803 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1804 res.ssid_len = p2p->ssid_len; 1805 } 1806 } 1807 1808 p2p_channels_dump(p2p, "own channels", &p2p->channels); 1809 p2p_channels_dump(p2p, "peer channels", &peer->channels); 1810 p2p_channels_intersect(&p2p->channels, &peer->channels, 1811 &intersection); 1812 if (go) { 1813 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq); 1814 p2p_channels_dump(p2p, "intersection after no-GO removal", 1815 &intersection); 1816 } 1817 1818 p2p_channels_to_freqs(&intersection, res.freq_list, 1819 P2P_MAX_CHANNELS); 1820 1821 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout; 1822 1823 p2p_clear_timeout(p2p); 1824 p2p->ssid_set = 0; 1825 peer->go_neg_req_sent = 0; 1826 peer->wps_method = WPS_NOT_READY; 1827 peer->oob_pw_id = 0; 1828 wpabuf_free(peer->go_neg_conf); 1829 peer->go_neg_conf = NULL; 1830 1831 p2p_set_state(p2p, P2P_PROVISIONING); 1832 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 1833} 1834 1835 1836static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa, 1837 const u8 *data, size_t len, int rx_freq) 1838{ 1839 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa)); 1840 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len); 1841 1842 if (len < 1) 1843 return; 1844 1845 switch (data[0]) { 1846 case P2P_GO_NEG_REQ: 1847 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq); 1848 break; 1849 case P2P_GO_NEG_RESP: 1850 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq); 1851 break; 1852 case P2P_GO_NEG_CONF: 1853 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1); 1854 break; 1855 case P2P_INVITATION_REQ: 1856 p2p_process_invitation_req(p2p, sa, data + 1, len - 1, 1857 rx_freq); 1858 break; 1859 case P2P_INVITATION_RESP: 1860 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1); 1861 break; 1862 case P2P_PROV_DISC_REQ: 1863 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1864 break; 1865 case P2P_PROV_DISC_RESP: 1866 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1); 1867 break; 1868 case P2P_DEV_DISC_REQ: 1869 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1870 break; 1871 case P2P_DEV_DISC_RESP: 1872 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1); 1873 break; 1874 default: 1875 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d", 1876 data[0]); 1877 break; 1878 } 1879} 1880 1881 1882static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, 1883 const u8 *sa, const u8 *bssid, const u8 *data, 1884 size_t len, int freq) 1885{ 1886 if (len < 1) 1887 return; 1888 1889 switch (data[0]) { 1890 case WLAN_PA_VENDOR_SPECIFIC: 1891 data++; 1892 len--; 1893 if (len < 4) 1894 return; 1895 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1896 return; 1897 1898 data += 4; 1899 len -= 4; 1900 1901 p2p_rx_p2p_action(p2p, sa, data, len, freq); 1902 break; 1903 case WLAN_PA_GAS_INITIAL_REQ: 1904 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq); 1905 break; 1906 case WLAN_PA_GAS_INITIAL_RESP: 1907 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq); 1908 break; 1909 case WLAN_PA_GAS_COMEBACK_REQ: 1910 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq); 1911 break; 1912 case WLAN_PA_GAS_COMEBACK_RESP: 1913 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq); 1914 break; 1915 } 1916} 1917 1918 1919void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa, 1920 const u8 *bssid, u8 category, 1921 const u8 *data, size_t len, int freq) 1922{ 1923 if (category == WLAN_ACTION_PUBLIC) { 1924 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq); 1925 return; 1926 } 1927 1928 if (category != WLAN_ACTION_VENDOR_SPECIFIC) 1929 return; 1930 1931 if (len < 4) 1932 return; 1933 1934 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1935 return; 1936 data += 4; 1937 len -= 4; 1938 1939 /* P2P action frame */ 1940 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa)); 1941 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len); 1942 1943 if (len < 1) 1944 return; 1945 switch (data[0]) { 1946 case P2P_NOA: 1947 p2p_dbg(p2p, "Received P2P Action - Notice of Absence"); 1948 /* TODO */ 1949 break; 1950 case P2P_PRESENCE_REQ: 1951 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq); 1952 break; 1953 case P2P_PRESENCE_RESP: 1954 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1); 1955 break; 1956 case P2P_GO_DISC_REQ: 1957 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq); 1958 break; 1959 default: 1960 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]); 1961 break; 1962 } 1963} 1964 1965 1966static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx) 1967{ 1968 struct p2p_data *p2p = eloop_ctx; 1969 if (p2p->go_neg_peer == NULL) 1970 return; 1971 if (p2p->pending_listen_freq) { 1972 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start"); 1973 p2p->pending_listen_freq = 0; 1974 } 1975 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1976 p2p->go_neg_peer->status = P2P_SC_SUCCESS; 1977 /* 1978 * Set new timeout to make sure a previously set one does not expire 1979 * too quickly while waiting for the GO Negotiation to complete. 1980 */ 1981 p2p_set_timeout(p2p, 0, 500000); 1982 p2p_connect_send(p2p, p2p->go_neg_peer); 1983} 1984 1985 1986static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx) 1987{ 1988 struct p2p_data *p2p = eloop_ctx; 1989 if (p2p->invite_peer == NULL) 1990 return; 1991 if (p2p->pending_listen_freq) { 1992 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start"); 1993 p2p->pending_listen_freq = 0; 1994 } 1995 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1996 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr, 1997 p2p->invite_dev_pw_id); 1998} 1999 2000 2001static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr, 2002 const u8 *ie, size_t ie_len) 2003{ 2004 struct p2p_message msg; 2005 struct p2p_device *dev; 2006 2007 os_memset(&msg, 0, sizeof(msg)); 2008 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL) 2009 { 2010 p2p_parse_free(&msg); 2011 return; /* not a P2P probe */ 2012 } 2013 2014 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 2015 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 2016 != 0) { 2017 /* The Probe Request is not part of P2P Device Discovery. It is 2018 * not known whether the source address of the frame is the P2P 2019 * Device Address or P2P Interface Address. Do not add a new 2020 * peer entry based on this frames. 2021 */ 2022 p2p_parse_free(&msg); 2023 return; 2024 } 2025 2026 dev = p2p_get_device(p2p, addr); 2027 if (dev) { 2028 if (dev->country[0] == 0 && msg.listen_channel) 2029 os_memcpy(dev->country, msg.listen_channel, 3); 2030 os_get_reltime(&dev->last_seen); 2031 p2p_parse_free(&msg); 2032 return; /* already known */ 2033 } 2034 2035 dev = p2p_create_device(p2p, addr); 2036 if (dev == NULL) { 2037 p2p_parse_free(&msg); 2038 return; 2039 } 2040 2041 os_get_reltime(&dev->last_seen); 2042 dev->flags |= P2P_DEV_PROBE_REQ_ONLY; 2043 2044 if (msg.listen_channel) { 2045 os_memcpy(dev->country, msg.listen_channel, 3); 2046 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3], 2047 msg.listen_channel[4]); 2048 } 2049 2050 p2p_copy_wps_info(p2p, dev, 1, &msg); 2051 2052 if (msg.wfd_subelems) { 2053 wpabuf_free(dev->info.wfd_subelems); 2054 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 2055 } 2056 2057 p2p_parse_free(&msg); 2058 2059 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR 2060 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d", 2061 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab, 2062 dev->info.group_capab, dev->info.device_name, 2063 dev->listen_freq); 2064} 2065 2066 2067struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p, 2068 const u8 *addr, 2069 struct p2p_message *msg) 2070{ 2071 struct p2p_device *dev; 2072 2073 dev = p2p_get_device(p2p, addr); 2074 if (dev) { 2075 os_get_reltime(&dev->last_seen); 2076 return dev; /* already known */ 2077 } 2078 2079 dev = p2p_create_device(p2p, addr); 2080 if (dev == NULL) 2081 return NULL; 2082 2083 p2p_add_dev_info(p2p, addr, dev, msg); 2084 2085 return dev; 2086} 2087 2088 2089static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type) 2090{ 2091 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0) 2092 return 1; 2093 if (os_memcmp(dev_type, req_dev_type, 2) == 0 && 2094 WPA_GET_BE32(&req_dev_type[2]) == 0 && 2095 WPA_GET_BE16(&req_dev_type[6]) == 0) 2096 return 1; /* Category match with wildcard OUI/sub-category */ 2097 return 0; 2098} 2099 2100 2101int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[], 2102 size_t num_req_dev_type) 2103{ 2104 size_t i; 2105 for (i = 0; i < num_req_dev_type; i++) { 2106 if (dev_type_match(dev_type, req_dev_type[i])) 2107 return 1; 2108 } 2109 return 0; 2110} 2111 2112 2113/** 2114 * p2p_match_dev_type - Match local device type with requested type 2115 * @p2p: P2P module context from p2p_init() 2116 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) 2117 * Returns: 1 on match, 0 on mismatch 2118 * 2119 * This function can be used to match the Requested Device Type attribute in 2120 * WPS IE with the local device types for deciding whether to reply to a Probe 2121 * Request frame. 2122 */ 2123int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps) 2124{ 2125 struct wps_parse_attr attr; 2126 size_t i; 2127 2128 if (wps_parse_msg(wps, &attr)) 2129 return 1; /* assume no Requested Device Type attributes */ 2130 2131 if (attr.num_req_dev_type == 0) 2132 return 1; /* no Requested Device Type attributes -> match */ 2133 2134 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type, 2135 attr.num_req_dev_type)) 2136 return 1; /* Own Primary Device Type matches */ 2137 2138 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) { 2139 if (dev_type_list_match(p2p->cfg->sec_dev_type[i], 2140 attr.req_dev_type, 2141 attr.num_req_dev_type)) 2142 return 1; /* Own Secondary Device Type matches */ 2143 } 2144 2145 /* No matching device type found */ 2146 return 0; 2147} 2148 2149 2150struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p) 2151{ 2152 struct wpabuf *buf; 2153 u8 *len; 2154 int pw_id = -1; 2155 size_t extra = 0; 2156 2157#ifdef CONFIG_WIFI_DISPLAY 2158 if (p2p->wfd_ie_probe_resp) 2159 extra = wpabuf_len(p2p->wfd_ie_probe_resp); 2160#endif /* CONFIG_WIFI_DISPLAY */ 2161 2162 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]) 2163 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]); 2164 2165 if (p2p->query_count) 2166 extra += MAX_SVC_ADV_IE_LEN; 2167 2168 buf = wpabuf_alloc(1000 + extra); 2169 if (buf == NULL) 2170 return NULL; 2171 2172 if (p2p->go_neg_peer) { 2173 /* Advertise immediate availability of WPS credential */ 2174 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method); 2175 } 2176 2177 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) { 2178 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response"); 2179 wpabuf_free(buf); 2180 return NULL; 2181 } 2182 2183#ifdef CONFIG_WIFI_DISPLAY 2184 if (p2p->wfd_ie_probe_resp) 2185 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp); 2186#endif /* CONFIG_WIFI_DISPLAY */ 2187 2188 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]) 2189 wpabuf_put_buf(buf, 2190 p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]); 2191 2192 /* P2P IE */ 2193 len = p2p_buf_add_ie_hdr(buf); 2194 p2p_buf_add_capability(buf, p2p->dev_capab & 2195 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2196 if (p2p->ext_listen_interval) 2197 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 2198 p2p->ext_listen_interval); 2199 p2p_buf_add_device_info(buf, p2p, NULL); 2200 p2p_buf_update_ie_hdr(buf, len); 2201 2202 if (p2p->query_count) { 2203 p2p_buf_add_service_instance(buf, p2p, p2p->query_count, 2204 p2p->query_hash, 2205 p2p->p2ps_adv_list); 2206 } 2207 2208 return buf; 2209} 2210 2211 2212static int p2p_service_find_asp(struct p2p_data *p2p, const u8 *hash) 2213{ 2214 struct p2ps_advertisement *adv_data; 2215 2216 p2p_dbg(p2p, "ASP find - ASP list: %p", p2p->p2ps_adv_list); 2217 2218 /* Wildcard always matches if we have actual services */ 2219 if (os_memcmp(hash, p2p->wild_card_hash, P2PS_HASH_LEN) == 0) 2220 return p2p->p2ps_adv_list != NULL; 2221 2222 adv_data = p2p->p2ps_adv_list; 2223 while (adv_data) { 2224 p2p_dbg(p2p, "ASP hash: %x =? %x", hash[0], adv_data->hash[0]); 2225 if (os_memcmp(hash, adv_data->hash, P2PS_HASH_LEN) == 0) 2226 return 1; 2227 adv_data = adv_data->next; 2228 } 2229 2230 return 0; 2231} 2232 2233 2234static enum p2p_probe_req_status 2235p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2236 const u8 *bssid, const u8 *ie, size_t ie_len) 2237{ 2238 struct ieee802_11_elems elems; 2239 struct wpabuf *buf; 2240 struct ieee80211_mgmt *resp; 2241 struct p2p_message msg; 2242 struct wpabuf *ies; 2243 2244 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) == 2245 ParseFailed) { 2246 /* Ignore invalid Probe Request frames */ 2247 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it"); 2248 return P2P_PREQ_MALFORMED; 2249 } 2250 2251 if (elems.p2p == NULL) { 2252 /* not a P2P probe - ignore it */ 2253 p2p_dbg(p2p, "Not a P2P probe - ignore it"); 2254 return P2P_PREQ_NOT_P2P; 2255 } 2256 2257 if (dst && !is_broadcast_ether_addr(dst) && 2258 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2259 /* Not sent to the broadcast address or our P2P Device Address 2260 */ 2261 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it", 2262 MAC2STR(dst)); 2263 return P2P_PREQ_NOT_PROCESSED; 2264 } 2265 2266 if (bssid && !is_broadcast_ether_addr(bssid)) { 2267 /* Not sent to the Wildcard BSSID */ 2268 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it", 2269 MAC2STR(bssid)); 2270 return P2P_PREQ_NOT_PROCESSED; 2271 } 2272 2273 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN || 2274 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) != 2275 0) { 2276 /* not using P2P Wildcard SSID - ignore */ 2277 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it"); 2278 return P2P_PREQ_NOT_PROCESSED; 2279 } 2280 2281 if (supp_rates_11b_only(&elems)) { 2282 /* Indicates support for 11b rates only */ 2283 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it"); 2284 return P2P_PREQ_NOT_P2P; 2285 } 2286 2287 os_memset(&msg, 0, sizeof(msg)); 2288 if (p2p_parse_ies(ie, ie_len, &msg) < 0) { 2289 /* Could not parse P2P attributes */ 2290 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it"); 2291 return P2P_PREQ_NOT_P2P; 2292 } 2293 2294 p2p->p2ps_svc_found = 0; 2295 2296 if (msg.service_hash && msg.service_hash_count) { 2297 const u8 *hash = msg.service_hash; 2298 u8 *dest = p2p->query_hash; 2299 u8 i; 2300 2301 p2p->query_count = 0; 2302 for (i = 0; i < msg.service_hash_count; i++) { 2303 if (p2p_service_find_asp(p2p, hash)) { 2304 p2p->p2ps_svc_found = 1; 2305 2306 if (!os_memcmp(hash, p2p->wild_card_hash, 2307 P2PS_HASH_LEN)) { 2308 /* We found match(es) but wildcard 2309 * will return all */ 2310 p2p->query_count = 1; 2311 os_memcpy(p2p->query_hash, hash, 2312 P2PS_HASH_LEN); 2313 break; 2314 } 2315 2316 /* Save each matching hash */ 2317 if (p2p->query_count < P2P_MAX_QUERY_HASH) { 2318 os_memcpy(dest, hash, P2PS_HASH_LEN); 2319 dest += P2PS_HASH_LEN; 2320 p2p->query_count++; 2321 } else { 2322 /* We found match(es) but too many to 2323 * return all */ 2324 p2p->query_count = 0; 2325 break; 2326 } 2327 } 2328 hash += P2PS_HASH_LEN; 2329 } 2330 2331 p2p_dbg(p2p, "ASP adv found: %d", p2p->p2ps_svc_found); 2332 2333 /* Probed hash unknown */ 2334 if (!p2p->p2ps_svc_found) { 2335 p2p_parse_free(&msg); 2336 return P2P_PREQ_NOT_PROCESSED; 2337 } 2338 } else { 2339 /* This is not a P2PS Probe Request */ 2340 p2p->query_count = 0; 2341 p2p_dbg(p2p, "No P2PS Hash in Probe Request"); 2342 2343 if (!p2p->in_listen || !p2p->drv_in_listen) { 2344 /* not in Listen state - ignore Probe Request */ 2345 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request", 2346 p2p->in_listen, p2p->drv_in_listen); 2347 p2p_parse_free(&msg); 2348 return P2P_PREQ_NOT_LISTEN; 2349 } 2350 } 2351 2352 if (msg.device_id && 2353 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2354 /* Device ID did not match */ 2355 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it", 2356 MAC2STR(msg.device_id)); 2357 p2p_parse_free(&msg); 2358 return P2P_PREQ_NOT_PROCESSED; 2359 } 2360 2361 /* Check Requested Device Type match */ 2362 if (msg.wps_attributes && 2363 !p2p_match_dev_type(p2p, msg.wps_attributes)) { 2364 /* No match with Requested Device Type */ 2365 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it"); 2366 p2p_parse_free(&msg); 2367 return P2P_PREQ_NOT_PROCESSED; 2368 } 2369 p2p_parse_free(&msg); 2370 2371 if (!p2p->cfg->send_probe_resp) { 2372 /* Response generated elsewhere */ 2373 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response"); 2374 return P2P_PREQ_NOT_PROCESSED; 2375 } 2376 2377 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state"); 2378 2379 /* 2380 * We do not really have a specific BSS that this frame is advertising, 2381 * so build a frame that has some information in valid format. This is 2382 * really only used for discovery purposes, not to learn exact BSS 2383 * parameters. 2384 */ 2385 ies = p2p_build_probe_resp_ies(p2p); 2386 if (ies == NULL) 2387 return P2P_PREQ_NOT_PROCESSED; 2388 2389 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 2390 if (buf == NULL) { 2391 wpabuf_free(ies); 2392 return P2P_PREQ_NOT_PROCESSED; 2393 } 2394 2395 resp = NULL; 2396 resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp); 2397 2398 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 2399 (WLAN_FC_STYPE_PROBE_RESP << 4)); 2400 os_memcpy(resp->da, addr, ETH_ALEN); 2401 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN); 2402 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN); 2403 resp->u.probe_resp.beacon_int = host_to_le16(100); 2404 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 2405 resp->u.probe_resp.capab_info = 2406 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE | 2407 WLAN_CAPABILITY_PRIVACY | 2408 WLAN_CAPABILITY_SHORT_SLOT_TIME); 2409 2410 wpabuf_put_u8(buf, WLAN_EID_SSID); 2411 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN); 2412 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 2413 2414 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES); 2415 wpabuf_put_u8(buf, 8); 2416 wpabuf_put_u8(buf, (60 / 5) | 0x80); 2417 wpabuf_put_u8(buf, 90 / 5); 2418 wpabuf_put_u8(buf, (120 / 5) | 0x80); 2419 wpabuf_put_u8(buf, 180 / 5); 2420 wpabuf_put_u8(buf, (240 / 5) | 0x80); 2421 wpabuf_put_u8(buf, 360 / 5); 2422 wpabuf_put_u8(buf, 480 / 5); 2423 wpabuf_put_u8(buf, 540 / 5); 2424 2425 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS); 2426 wpabuf_put_u8(buf, 1); 2427 wpabuf_put_u8(buf, p2p->cfg->channel); 2428 2429 wpabuf_put_buf(buf, ies); 2430 wpabuf_free(ies); 2431 2432 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf); 2433 2434 wpabuf_free(buf); 2435 2436 return P2P_PREQ_NOT_PROCESSED; 2437} 2438 2439 2440enum p2p_probe_req_status 2441p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2442 const u8 *bssid, const u8 *ie, size_t ie_len) 2443{ 2444 enum p2p_probe_req_status res; 2445 2446 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len); 2447 2448 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len); 2449 p2p->query_count = 0; 2450 2451 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) && 2452 p2p->go_neg_peer && 2453 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN) 2454 == 0 && 2455 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 2456 /* Received a Probe Request from GO Negotiation peer */ 2457 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout"); 2458 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2459 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL); 2460 return P2P_PREQ_PROCESSED; 2461 } 2462 2463 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) && 2464 p2p->invite_peer && 2465 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) && 2466 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN) 2467 == 0) { 2468 /* Received a Probe Request from Invite peer */ 2469 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout"); 2470 eloop_cancel_timeout(p2p_invite_start, p2p, NULL); 2471 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL); 2472 return P2P_PREQ_PROCESSED; 2473 } 2474 2475 return res; 2476} 2477 2478 2479static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid, 2480 u8 *buf, size_t len, struct wpabuf *p2p_ie) 2481{ 2482 struct wpabuf *tmp; 2483 u8 *lpos; 2484 size_t tmplen; 2485 int res; 2486 u8 group_capab; 2487 2488 if (p2p_ie == NULL) 2489 return 0; /* WLAN AP is not a P2P manager */ 2490 2491 /* 2492 * (Re)Association Request - P2P IE 2493 * P2P Capability attribute (shall be present) 2494 * P2P Interface attribute (present if concurrent device and 2495 * P2P Management is enabled) 2496 */ 2497 tmp = wpabuf_alloc(200); 2498 if (tmp == NULL) 2499 return -1; 2500 2501 lpos = p2p_buf_add_ie_hdr(tmp); 2502 group_capab = 0; 2503 if (p2p->num_groups > 0) { 2504 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; 2505 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2506 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) && 2507 p2p->cross_connect) 2508 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 2509 } 2510 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab); 2511 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2512 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED)) 2513 p2p_buf_add_p2p_interface(tmp, p2p); 2514 p2p_buf_update_ie_hdr(tmp, lpos); 2515 2516 tmplen = wpabuf_len(tmp); 2517 if (tmplen > len) 2518 res = -1; 2519 else { 2520 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2521 res = tmplen; 2522 } 2523 wpabuf_free(tmp); 2524 2525 return res; 2526} 2527 2528 2529int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf, 2530 size_t len, int p2p_group, struct wpabuf *p2p_ie) 2531{ 2532 struct wpabuf *tmp; 2533 u8 *lpos; 2534 struct p2p_device *peer; 2535 size_t tmplen; 2536 int res; 2537 size_t extra = 0; 2538 2539 if (!p2p_group) 2540 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie); 2541 2542#ifdef CONFIG_WIFI_DISPLAY 2543 if (p2p->wfd_ie_assoc_req) 2544 extra = wpabuf_len(p2p->wfd_ie_assoc_req); 2545#endif /* CONFIG_WIFI_DISPLAY */ 2546 2547 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]) 2548 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]); 2549 2550 /* 2551 * (Re)Association Request - P2P IE 2552 * P2P Capability attribute (shall be present) 2553 * Extended Listen Timing (may be present) 2554 * P2P Device Info attribute (shall be present) 2555 */ 2556 tmp = wpabuf_alloc(200 + extra); 2557 if (tmp == NULL) 2558 return -1; 2559 2560#ifdef CONFIG_WIFI_DISPLAY 2561 if (p2p->wfd_ie_assoc_req) 2562 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req); 2563#endif /* CONFIG_WIFI_DISPLAY */ 2564 2565 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]) 2566 wpabuf_put_buf(tmp, 2567 p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]); 2568 2569 peer = bssid ? p2p_get_device(p2p, bssid) : NULL; 2570 2571 lpos = p2p_buf_add_ie_hdr(tmp); 2572 p2p_buf_add_capability(tmp, p2p->dev_capab, 0); 2573 if (p2p->ext_listen_interval) 2574 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period, 2575 p2p->ext_listen_interval); 2576 p2p_buf_add_device_info(tmp, p2p, peer); 2577 p2p_buf_update_ie_hdr(tmp, lpos); 2578 2579 tmplen = wpabuf_len(tmp); 2580 if (tmplen > len) 2581 res = -1; 2582 else { 2583 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2584 res = tmplen; 2585 } 2586 wpabuf_free(tmp); 2587 2588 return res; 2589} 2590 2591 2592int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) 2593{ 2594 struct wpabuf *p2p_ie; 2595 int ret; 2596 2597 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); 2598 if (p2p_ie == NULL) 2599 return 0; 2600 2601 ret = p2p_attr_text(p2p_ie, buf, end); 2602 wpabuf_free(p2p_ie); 2603 return ret; 2604} 2605 2606 2607struct p2ps_advertisement * 2608p2p_service_p2ps_id(struct p2p_data *p2p, u32 adv_id) 2609{ 2610 struct p2ps_advertisement *adv_data; 2611 2612 if (!p2p) 2613 return NULL; 2614 2615 adv_data = p2p->p2ps_adv_list; 2616 while (adv_data) { 2617 if (adv_data->id == adv_id) 2618 return adv_data; 2619 adv_data = adv_data->next; 2620 } 2621 2622 return NULL; 2623} 2624 2625 2626int p2p_service_del_asp(struct p2p_data *p2p, u32 adv_id) 2627{ 2628 struct p2ps_advertisement *adv_data; 2629 struct p2ps_advertisement **prior; 2630 2631 if (!p2p) 2632 return -1; 2633 2634 adv_data = p2p->p2ps_adv_list; 2635 prior = &p2p->p2ps_adv_list; 2636 while (adv_data) { 2637 if (adv_data->id == adv_id) { 2638 p2p_dbg(p2p, "Delete ASP adv_id=0x%x", adv_id); 2639 *prior = adv_data->next; 2640 os_free(adv_data); 2641 return 0; 2642 } 2643 prior = &adv_data->next; 2644 adv_data = adv_data->next; 2645 } 2646 2647 return -1; 2648} 2649 2650 2651int p2p_service_add_asp(struct p2p_data *p2p, int auto_accept, u32 adv_id, 2652 const char *adv_str, u8 svc_state, u16 config_methods, 2653 const char *svc_info) 2654{ 2655 struct p2ps_advertisement *adv_data, *tmp, **prev; 2656 u8 buf[P2PS_HASH_LEN]; 2657 size_t adv_data_len, adv_len, info_len = 0; 2658 2659 if (!p2p || !adv_str || !adv_str[0]) 2660 return -1; 2661 2662 if (!(config_methods & p2p->cfg->config_methods)) { 2663 p2p_dbg(p2p, "Config methods not supported svc: 0x%x dev: 0x%x", 2664 config_methods, p2p->cfg->config_methods); 2665 return -1; 2666 } 2667 2668 if (!p2ps_gen_hash(p2p, adv_str, buf)) 2669 return -1; 2670 2671 if (svc_info) 2672 info_len = os_strlen(svc_info); 2673 adv_len = os_strlen(adv_str); 2674 adv_data_len = sizeof(struct p2ps_advertisement) + adv_len + 1 + 2675 info_len + 1; 2676 2677 adv_data = os_zalloc(adv_data_len); 2678 if (!adv_data) 2679 return -1; 2680 2681 os_memcpy(adv_data->hash, buf, P2PS_HASH_LEN); 2682 adv_data->id = adv_id; 2683 adv_data->state = svc_state; 2684 adv_data->config_methods = config_methods & p2p->cfg->config_methods; 2685 adv_data->auto_accept = (u8) auto_accept; 2686 os_memcpy(adv_data->svc_name, adv_str, adv_len); 2687 2688 if (svc_info && info_len) { 2689 adv_data->svc_info = &adv_data->svc_name[adv_len + 1]; 2690 os_memcpy(adv_data->svc_info, svc_info, info_len); 2691 } 2692 2693 /* 2694 * Group Advertisements by service string. They do not need to be 2695 * sorted, but groups allow easier Probe Response instance grouping 2696 */ 2697 tmp = p2p->p2ps_adv_list; 2698 prev = &p2p->p2ps_adv_list; 2699 while (tmp) { 2700 if (tmp->id == adv_data->id) { 2701 if (os_strcmp(tmp->svc_name, adv_data->svc_name) != 0) { 2702 os_free(adv_data); 2703 return -1; 2704 } 2705 adv_data->next = tmp->next; 2706 *prev = adv_data; 2707 os_free(tmp); 2708 goto inserted; 2709 } else { 2710 if (os_strcmp(tmp->svc_name, adv_data->svc_name) == 0) { 2711 adv_data->next = tmp->next; 2712 tmp->next = adv_data; 2713 goto inserted; 2714 } 2715 } 2716 prev = &tmp->next; 2717 tmp = tmp->next; 2718 } 2719 2720 /* No svc_name match found */ 2721 adv_data->next = p2p->p2ps_adv_list; 2722 p2p->p2ps_adv_list = adv_data; 2723 2724inserted: 2725 p2p_dbg(p2p, 2726 "Added ASP advertisement adv_id=0x%x config_methods=0x%x svc_state=0x%x adv_str='%s'", 2727 adv_id, adv_data->config_methods, svc_state, adv_str); 2728 2729 return 0; 2730} 2731 2732 2733int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr) 2734{ 2735 struct p2p_message msg; 2736 2737 os_memset(&msg, 0, sizeof(msg)); 2738 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 2739 return -1; 2740 2741 if (msg.p2p_device_addr) { 2742 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); 2743 return 0; 2744 } else if (msg.device_id) { 2745 os_memcpy(dev_addr, msg.device_id, ETH_ALEN); 2746 return 0; 2747 } 2748 return -1; 2749} 2750 2751 2752int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr) 2753{ 2754 struct wpabuf *p2p_ie; 2755 int ret; 2756 2757 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 2758 P2P_IE_VENDOR_TYPE); 2759 if (p2p_ie == NULL) 2760 return -1; 2761 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr); 2762 wpabuf_free(p2p_ie); 2763 return ret; 2764} 2765 2766 2767static void p2p_clear_go_neg(struct p2p_data *p2p) 2768{ 2769 p2p->go_neg_peer = NULL; 2770 p2p_clear_timeout(p2p); 2771 p2p_set_state(p2p, P2P_IDLE); 2772} 2773 2774 2775void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr) 2776{ 2777 if (p2p->go_neg_peer == NULL) { 2778 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification"); 2779 return; /* No pending Group Formation */ 2780 } 2781 2782 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) != 2783 0) { 2784 p2p_dbg(p2p, "Ignore WPS registration success notification for " 2785 MACSTR " (GO Negotiation peer " MACSTR ")", 2786 MAC2STR(mac_addr), 2787 MAC2STR(p2p->go_neg_peer->intended_addr)); 2788 return; /* Ignore unexpected peer address */ 2789 } 2790 2791 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR, 2792 MAC2STR(mac_addr)); 2793 2794 p2p_clear_go_neg(p2p); 2795} 2796 2797 2798void p2p_group_formation_failed(struct p2p_data *p2p) 2799{ 2800 if (p2p->go_neg_peer == NULL) { 2801 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification"); 2802 return; /* No pending Group Formation */ 2803 } 2804 2805 p2p_dbg(p2p, "Group Formation failed with " MACSTR, 2806 MAC2STR(p2p->go_neg_peer->intended_addr)); 2807 2808 p2p_clear_go_neg(p2p); 2809} 2810 2811 2812struct p2p_data * p2p_init(const struct p2p_config *cfg) 2813{ 2814 struct p2p_data *p2p; 2815 2816 if (cfg->max_peers < 1 || 2817 cfg->passphrase_len < 8 || cfg->passphrase_len > 63) 2818 return NULL; 2819 2820 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg)); 2821 if (p2p == NULL) 2822 return NULL; 2823 p2p->cfg = (struct p2p_config *) (p2p + 1); 2824 os_memcpy(p2p->cfg, cfg, sizeof(*cfg)); 2825 if (cfg->dev_name) 2826 p2p->cfg->dev_name = os_strdup(cfg->dev_name); 2827 if (cfg->manufacturer) 2828 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer); 2829 if (cfg->model_name) 2830 p2p->cfg->model_name = os_strdup(cfg->model_name); 2831 if (cfg->model_number) 2832 p2p->cfg->model_number = os_strdup(cfg->model_number); 2833 if (cfg->serial_number) 2834 p2p->cfg->serial_number = os_strdup(cfg->serial_number); 2835 if (cfg->pref_chan) { 2836 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan * 2837 sizeof(struct p2p_channel)); 2838 if (p2p->cfg->pref_chan) { 2839 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan, 2840 cfg->num_pref_chan * 2841 sizeof(struct p2p_channel)); 2842 } else 2843 p2p->cfg->num_pref_chan = 0; 2844 } 2845 2846 p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash); 2847 2848 p2p->min_disc_int = 1; 2849 p2p->max_disc_int = 3; 2850 p2p->max_disc_tu = -1; 2851 2852 if (os_get_random(&p2p->next_tie_breaker, 1) < 0) 2853 p2p->next_tie_breaker = 0; 2854 p2p->next_tie_breaker &= 0x01; 2855 if (cfg->sd_request) 2856 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 2857 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE; 2858 if (cfg->concurrent_operations) 2859 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER; 2860 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 2861 2862 dl_list_init(&p2p->devices); 2863 2864 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 2865 p2p_expiration_timeout, p2p, NULL); 2866 2867 p2p->go_timeout = 100; 2868 p2p->client_timeout = 20; 2869 p2p->num_p2p_sd_queries = 0; 2870 2871 p2p_dbg(p2p, "initialized"); 2872 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 2873 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 2874 2875 return p2p; 2876} 2877 2878 2879void p2p_deinit(struct p2p_data *p2p) 2880{ 2881 struct p2ps_advertisement *adv, *prev; 2882 2883#ifdef CONFIG_WIFI_DISPLAY 2884 wpabuf_free(p2p->wfd_ie_beacon); 2885 wpabuf_free(p2p->wfd_ie_probe_req); 2886 wpabuf_free(p2p->wfd_ie_probe_resp); 2887 wpabuf_free(p2p->wfd_ie_assoc_req); 2888 wpabuf_free(p2p->wfd_ie_invitation); 2889 wpabuf_free(p2p->wfd_ie_prov_disc_req); 2890 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 2891 wpabuf_free(p2p->wfd_ie_go_neg); 2892 wpabuf_free(p2p->wfd_dev_info); 2893 wpabuf_free(p2p->wfd_assoc_bssid); 2894 wpabuf_free(p2p->wfd_coupled_sink_info); 2895#endif /* CONFIG_WIFI_DISPLAY */ 2896 2897 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL); 2898 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 2899 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2900 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2901 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL); 2902 p2p_flush(p2p); 2903 p2p_free_req_dev_types(p2p); 2904 os_free(p2p->cfg->dev_name); 2905 os_free(p2p->cfg->manufacturer); 2906 os_free(p2p->cfg->model_name); 2907 os_free(p2p->cfg->model_number); 2908 os_free(p2p->cfg->serial_number); 2909 os_free(p2p->cfg->pref_chan); 2910 os_free(p2p->groups); 2911 os_free(p2p->p2ps_prov); 2912 wpabuf_free(p2p->sd_resp); 2913 os_free(p2p->after_scan_tx); 2914 p2p_remove_wps_vendor_extensions(p2p); 2915 os_free(p2p->no_go_freq.range); 2916 2917 adv = p2p->p2ps_adv_list; 2918 while (adv) { 2919 prev = adv; 2920 adv = adv->next; 2921 os_free(prev); 2922 } 2923 2924 os_free(p2p); 2925} 2926 2927 2928void p2p_flush(struct p2p_data *p2p) 2929{ 2930 struct p2p_device *dev, *prev; 2931 p2p_stop_find(p2p); 2932 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device, 2933 list) { 2934 dl_list_del(&dev->list); 2935 p2p_device_free(p2p, dev); 2936 } 2937 p2p_free_sd_queries(p2p); 2938 os_free(p2p->after_scan_tx); 2939 p2p->after_scan_tx = NULL; 2940} 2941 2942 2943int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr) 2944{ 2945 struct p2p_device *dev; 2946 2947 dev = p2p_get_device(p2p, addr); 2948 if (dev == NULL) 2949 return -1; 2950 2951 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr)); 2952 2953 if (p2p->go_neg_peer == dev) { 2954 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL); 2955 p2p->go_neg_peer = NULL; 2956 } 2957 2958 dev->wps_method = WPS_NOT_READY; 2959 dev->oob_pw_id = 0; 2960 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 2961 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 2962 2963 /* Check if after_scan_tx is for this peer. If so free it */ 2964 if (p2p->after_scan_tx && 2965 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) { 2966 os_free(p2p->after_scan_tx); 2967 p2p->after_scan_tx = NULL; 2968 } 2969 2970 return 0; 2971} 2972 2973 2974int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name) 2975{ 2976 os_free(p2p->cfg->dev_name); 2977 if (dev_name) { 2978 p2p->cfg->dev_name = os_strdup(dev_name); 2979 if (p2p->cfg->dev_name == NULL) 2980 return -1; 2981 } else 2982 p2p->cfg->dev_name = NULL; 2983 return 0; 2984} 2985 2986 2987int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer) 2988{ 2989 os_free(p2p->cfg->manufacturer); 2990 p2p->cfg->manufacturer = NULL; 2991 if (manufacturer) { 2992 p2p->cfg->manufacturer = os_strdup(manufacturer); 2993 if (p2p->cfg->manufacturer == NULL) 2994 return -1; 2995 } 2996 2997 return 0; 2998} 2999 3000 3001int p2p_set_model_name(struct p2p_data *p2p, const char *model_name) 3002{ 3003 os_free(p2p->cfg->model_name); 3004 p2p->cfg->model_name = NULL; 3005 if (model_name) { 3006 p2p->cfg->model_name = os_strdup(model_name); 3007 if (p2p->cfg->model_name == NULL) 3008 return -1; 3009 } 3010 3011 return 0; 3012} 3013 3014 3015int p2p_set_model_number(struct p2p_data *p2p, const char *model_number) 3016{ 3017 os_free(p2p->cfg->model_number); 3018 p2p->cfg->model_number = NULL; 3019 if (model_number) { 3020 p2p->cfg->model_number = os_strdup(model_number); 3021 if (p2p->cfg->model_number == NULL) 3022 return -1; 3023 } 3024 3025 return 0; 3026} 3027 3028 3029int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number) 3030{ 3031 os_free(p2p->cfg->serial_number); 3032 p2p->cfg->serial_number = NULL; 3033 if (serial_number) { 3034 p2p->cfg->serial_number = os_strdup(serial_number); 3035 if (p2p->cfg->serial_number == NULL) 3036 return -1; 3037 } 3038 3039 return 0; 3040} 3041 3042 3043void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods) 3044{ 3045 p2p->cfg->config_methods = config_methods; 3046} 3047 3048 3049void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid) 3050{ 3051 os_memcpy(p2p->cfg->uuid, uuid, 16); 3052} 3053 3054 3055int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type) 3056{ 3057 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8); 3058 return 0; 3059} 3060 3061 3062int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8], 3063 size_t num_dev_types) 3064{ 3065 if (num_dev_types > P2P_SEC_DEVICE_TYPES) 3066 num_dev_types = P2P_SEC_DEVICE_TYPES; 3067 p2p->cfg->num_sec_dev_types = num_dev_types; 3068 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8); 3069 return 0; 3070} 3071 3072 3073void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p) 3074{ 3075 int i; 3076 3077 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 3078 wpabuf_free(p2p->wps_vendor_ext[i]); 3079 p2p->wps_vendor_ext[i] = NULL; 3080 } 3081} 3082 3083 3084int p2p_add_wps_vendor_extension(struct p2p_data *p2p, 3085 const struct wpabuf *vendor_ext) 3086{ 3087 int i; 3088 3089 if (vendor_ext == NULL) 3090 return -1; 3091 3092 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 3093 if (p2p->wps_vendor_ext[i] == NULL) 3094 break; 3095 } 3096 if (i >= P2P_MAX_WPS_VENDOR_EXT) 3097 return -1; 3098 3099 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext); 3100 if (p2p->wps_vendor_ext[i] == NULL) 3101 return -1; 3102 3103 return 0; 3104} 3105 3106 3107int p2p_set_country(struct p2p_data *p2p, const char *country) 3108{ 3109 os_memcpy(p2p->cfg->country, country, 3); 3110 return 0; 3111} 3112 3113 3114static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev) 3115{ 3116 if (dev->sd_pending_bcast_queries == 0) { 3117 /* Initialize with total number of registered broadcast 3118 * SD queries. */ 3119 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries; 3120 } 3121 3122 if (p2p_start_sd(p2p, dev) == 0) 3123 return 1; 3124 3125 if (dev->req_config_methods && 3126 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) { 3127 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 3128 MACSTR " (config methods 0x%x)", 3129 MAC2STR(dev->info.p2p_device_addr), 3130 dev->req_config_methods); 3131 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0) 3132 return 1; 3133 } 3134 3135 return 0; 3136} 3137 3138 3139void p2p_continue_find(struct p2p_data *p2p) 3140{ 3141 struct p2p_device *dev; 3142 int found; 3143 3144 p2p_set_state(p2p, P2P_SEARCH); 3145 3146 /* Continue from the device following the last iteration */ 3147 found = 0; 3148 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3149 if (dev == p2p->last_p2p_find_oper) { 3150 found = 1; 3151 continue; 3152 } 3153 if (!found) 3154 continue; 3155 if (p2p_pre_find_operation(p2p, dev) > 0) { 3156 p2p->last_p2p_find_oper = dev; 3157 return; 3158 } 3159 } 3160 3161 /* 3162 * Wrap around to the beginning of the list and continue until the last 3163 * iteration device. 3164 */ 3165 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3166 if (p2p_pre_find_operation(p2p, dev) > 0) { 3167 p2p->last_p2p_find_oper = dev; 3168 return; 3169 } 3170 if (dev == p2p->last_p2p_find_oper) 3171 break; 3172 } 3173 3174 p2p_listen_in_find(p2p, 1); 3175} 3176 3177 3178static void p2p_sd_cb(struct p2p_data *p2p, int success) 3179{ 3180 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d", 3181 success); 3182 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3183 3184 if (!success) { 3185 if (p2p->sd_peer) 3186 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3187 p2p->sd_peer = NULL; 3188 if (p2p->state != P2P_IDLE) 3189 p2p_continue_find(p2p); 3190 return; 3191 } 3192 3193 if (p2p->sd_peer == NULL) { 3194 p2p_dbg(p2p, "No SD peer entry known"); 3195 if (p2p->state != P2P_IDLE) 3196 p2p_continue_find(p2p); 3197 return; 3198 } 3199 3200 if (p2p->sd_query && p2p->sd_query->for_all_peers) { 3201 /* Update the pending broadcast SD query count for this device 3202 */ 3203 p2p->sd_peer->sd_pending_bcast_queries--; 3204 3205 /* 3206 * If there are no pending broadcast queries for this device, 3207 * mark it as done (-1). 3208 */ 3209 if (p2p->sd_peer->sd_pending_bcast_queries == 0) 3210 p2p->sd_peer->sd_pending_bcast_queries = -1; 3211 } 3212 3213 /* Wait for response from the peer */ 3214 p2p_set_state(p2p, P2P_SD_DURING_FIND); 3215 p2p_set_timeout(p2p, 0, 200000); 3216} 3217 3218 3219/** 3220 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state 3221 * @p2p: P2P module context from p2p_init() 3222 */ 3223static void p2p_retry_pd(struct p2p_data *p2p) 3224{ 3225 struct p2p_device *dev; 3226 3227 /* 3228 * Retry the prov disc req attempt only for the peer that the user had 3229 * requested. 3230 */ 3231 3232 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3233 if (os_memcmp(p2p->pending_pd_devaddr, 3234 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3235 continue; 3236 if (!dev->req_config_methods) 3237 continue; 3238 3239 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 3240 MACSTR " (config methods 0x%x)", 3241 MAC2STR(dev->info.p2p_device_addr), 3242 dev->req_config_methods); 3243 p2p_send_prov_disc_req(p2p, dev, 3244 dev->flags & P2P_DEV_PD_FOR_JOIN, 3245 p2p->pd_force_freq); 3246 return; 3247 } 3248} 3249 3250 3251static void p2p_prov_disc_cb(struct p2p_data *p2p, int success) 3252{ 3253 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d", 3254 success); 3255 3256 /* 3257 * Postpone resetting the pending action state till after we actually 3258 * time out. This allows us to take some action like notifying any 3259 * interested parties about no response to the request. 3260 * 3261 * When the timer (below) goes off we check in IDLE, SEARCH, or 3262 * LISTEN_ONLY state, which are the only allowed states to issue a PD 3263 * requests in, if this was still pending and then raise notification. 3264 */ 3265 3266 if (!success) { 3267 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3268 3269 if (p2p->user_initiated_pd && 3270 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY)) 3271 { 3272 /* Retry request from timeout to avoid busy loops */ 3273 p2p->pending_action_state = P2P_PENDING_PD; 3274 p2p_set_timeout(p2p, 0, 50000); 3275 } else if (p2p->state != P2P_IDLE) 3276 p2p_continue_find(p2p); 3277 else if (p2p->user_initiated_pd) { 3278 p2p->pending_action_state = P2P_PENDING_PD; 3279 p2p_set_timeout(p2p, 0, 300000); 3280 } 3281 return; 3282 } 3283 3284 /* 3285 * This postponing, of resetting pending_action_state, needs to be 3286 * done only for user initiated PD requests and not internal ones. 3287 */ 3288 if (p2p->user_initiated_pd) 3289 p2p->pending_action_state = P2P_PENDING_PD; 3290 else 3291 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3292 3293 /* Wait for response from the peer */ 3294 if (p2p->state == P2P_SEARCH) 3295 p2p_set_state(p2p, P2P_PD_DURING_FIND); 3296 p2p_set_timeout(p2p, 0, 200000); 3297} 3298 3299 3300static int p2p_check_after_scan_tx_continuation(struct p2p_data *p2p) 3301{ 3302 if (p2p->after_scan_tx_in_progress) { 3303 p2p->after_scan_tx_in_progress = 0; 3304 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING && 3305 p2p_run_after_scan(p2p)) 3306 return 1; 3307 if (p2p->state == P2P_SEARCH) { 3308 p2p_dbg(p2p, "Continue find after after_scan_tx completion"); 3309 p2p_continue_find(p2p); 3310 } 3311 } 3312 3313 return 0; 3314} 3315 3316 3317static void p2p_prov_disc_resp_cb(struct p2p_data *p2p, int success) 3318{ 3319 p2p_dbg(p2p, "Provision Discovery Response TX callback: success=%d", 3320 success); 3321 3322 if (p2p->send_action_in_progress) { 3323 p2p->send_action_in_progress = 0; 3324 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3325 } 3326 3327 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3328 3329 if (!success) 3330 goto continue_search; 3331 3332 if (!p2p->cfg->prov_disc_resp_cb || 3333 p2p->cfg->prov_disc_resp_cb(p2p->cfg->cb_ctx) < 1) 3334 goto continue_search; 3335 3336 p2p_dbg(p2p, 3337 "Post-Provision Discovery operations started - do not try to continue other P2P operations"); 3338 return; 3339 3340continue_search: 3341 p2p_check_after_scan_tx_continuation(p2p); 3342} 3343 3344 3345int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq, 3346 struct os_reltime *rx_time, int level, const u8 *ies, 3347 size_t ies_len) 3348{ 3349 if (os_reltime_before(rx_time, &p2p->find_start)) { 3350 /* 3351 * The driver may have cached (e.g., in cfg80211 BSS table) the 3352 * scan results for relatively long time. To avoid reporting 3353 * stale information, update P2P peers only based on results 3354 * that have based on frames received after the last p2p_find 3355 * operation was started. 3356 */ 3357 p2p_dbg(p2p, "Ignore old scan result for " MACSTR 3358 " (rx_time=%u.%06u)", 3359 MAC2STR(bssid), (unsigned int) rx_time->sec, 3360 (unsigned int) rx_time->usec); 3361 return 0; 3362 } 3363 3364 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1); 3365 3366 return 0; 3367} 3368 3369 3370void p2p_scan_res_handled(struct p2p_data *p2p) 3371{ 3372 if (!p2p->p2p_scan_running) { 3373 p2p_dbg(p2p, "p2p_scan was not running, but scan results received"); 3374 } 3375 p2p->p2p_scan_running = 0; 3376 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 3377 3378 if (p2p_run_after_scan(p2p)) 3379 return; 3380 if (p2p->state == P2P_SEARCH) 3381 p2p_continue_find(p2p); 3382} 3383 3384 3385void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id) 3386{ 3387 u8 dev_capab; 3388 u8 *len; 3389 3390#ifdef CONFIG_WIFI_DISPLAY 3391 if (p2p->wfd_ie_probe_req) 3392 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req); 3393#endif /* CONFIG_WIFI_DISPLAY */ 3394 3395 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]) 3396 wpabuf_put_buf(ies, 3397 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]); 3398 3399 len = p2p_buf_add_ie_hdr(ies); 3400 3401 dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3402 3403 /* P2PS requires Probe Request frames to include SD bit */ 3404 if (p2p->p2ps_seek && p2p->p2ps_seek_count) 3405 dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 3406 3407 p2p_buf_add_capability(ies, dev_capab, 0); 3408 3409 if (dev_id) 3410 p2p_buf_add_device_id(ies, dev_id); 3411 if (p2p->cfg->reg_class && p2p->cfg->channel) 3412 p2p_buf_add_listen_channel(ies, p2p->cfg->country, 3413 p2p->cfg->reg_class, 3414 p2p->cfg->channel); 3415 if (p2p->ext_listen_interval) 3416 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period, 3417 p2p->ext_listen_interval); 3418 3419 if (p2p->p2ps_seek && p2p->p2ps_seek_count) 3420 p2p_buf_add_service_hash(ies, p2p); 3421 3422 /* TODO: p2p_buf_add_operating_channel() if GO */ 3423 p2p_buf_update_ie_hdr(ies, len); 3424} 3425 3426 3427size_t p2p_scan_ie_buf_len(struct p2p_data *p2p) 3428{ 3429 size_t len = 100; 3430 3431#ifdef CONFIG_WIFI_DISPLAY 3432 if (p2p && p2p->wfd_ie_probe_req) 3433 len += wpabuf_len(p2p->wfd_ie_probe_req); 3434#endif /* CONFIG_WIFI_DISPLAY */ 3435 3436 if (p2p && p2p->vendor_elem && 3437 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]) 3438 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]); 3439 3440 return len; 3441} 3442 3443 3444int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end) 3445{ 3446 return p2p_attr_text(p2p_ie, buf, end); 3447} 3448 3449 3450static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success) 3451{ 3452 struct p2p_device *dev = p2p->go_neg_peer; 3453 int timeout; 3454 3455 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success); 3456 3457 if (dev == NULL) { 3458 p2p_dbg(p2p, "No pending GO Negotiation"); 3459 return; 3460 } 3461 3462 if (success) { 3463 if (dev->flags & P2P_DEV_USER_REJECTED) { 3464 p2p_set_state(p2p, P2P_IDLE); 3465 return; 3466 } 3467 } else if (dev->go_neg_req_sent) { 3468 /* Cancel the increment from p2p_connect_send() on failure */ 3469 dev->go_neg_req_sent--; 3470 } 3471 3472 if (!success && 3473 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) && 3474 !is_zero_ether_addr(dev->member_in_go_dev)) { 3475 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO", 3476 MAC2STR(dev->info.p2p_device_addr)); 3477 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3478 p2p_send_dev_disc_req(p2p, dev); 3479 return; 3480 } 3481 3482 /* 3483 * Use P2P find, if needed, to find the other device from its listen 3484 * channel. 3485 */ 3486 p2p_set_state(p2p, P2P_CONNECT); 3487 timeout = success ? 500000 : 100000; 3488 if (!success && p2p->go_neg_peer && 3489 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) { 3490 unsigned int r; 3491 /* 3492 * Peer is expected to wait our response and we will skip the 3493 * listen phase. Add some randomness to the wait time here to 3494 * make it less likely to hit cases where we could end up in 3495 * sync with peer not listening. 3496 */ 3497 if (os_get_random((u8 *) &r, sizeof(r)) < 0) 3498 r = 0; 3499 timeout += r % 100000; 3500 } 3501 p2p_set_timeout(p2p, 0, timeout); 3502} 3503 3504 3505static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success) 3506{ 3507 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d", 3508 success); 3509 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) { 3510 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore"); 3511 return; 3512 } 3513 p2p_set_state(p2p, P2P_CONNECT); 3514 p2p_set_timeout(p2p, 0, 500000); 3515} 3516 3517 3518static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success, 3519 const u8 *addr) 3520{ 3521 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success); 3522 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) { 3523 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status); 3524 return; 3525 } 3526 3527 if (success) { 3528 struct p2p_device *dev; 3529 dev = p2p_get_device(p2p, addr); 3530 if (dev && 3531 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) 3532 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE; 3533 } 3534 3535 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND) 3536 p2p_continue_find(p2p); 3537} 3538 3539 3540static void p2p_go_neg_conf_cb(struct p2p_data *p2p, 3541 enum p2p_send_action_result result) 3542{ 3543 struct p2p_device *dev; 3544 3545 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result); 3546 if (result == P2P_SEND_ACTION_FAILED) { 3547 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3548 p2p_go_neg_failed(p2p, -1); 3549 return; 3550 } 3551 3552 dev = p2p->go_neg_peer; 3553 3554 if (result == P2P_SEND_ACTION_NO_ACK) { 3555 /* 3556 * Retry GO Negotiation Confirmation 3557 * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive 3558 * ACK for confirmation. 3559 */ 3560 if (dev && dev->go_neg_conf && 3561 dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) { 3562 p2p_dbg(p2p, "GO Negotiation Confirm retry %d", 3563 dev->go_neg_conf_sent); 3564 p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM; 3565 if (p2p_send_action(p2p, dev->go_neg_conf_freq, 3566 dev->info.p2p_device_addr, 3567 p2p->cfg->dev_addr, 3568 dev->info.p2p_device_addr, 3569 wpabuf_head(dev->go_neg_conf), 3570 wpabuf_len(dev->go_neg_conf), 0) >= 3571 0) { 3572 dev->go_neg_conf_sent++; 3573 return; 3574 } 3575 p2p_dbg(p2p, "Failed to re-send Action frame"); 3576 3577 /* 3578 * Continue with the assumption that the first attempt 3579 * went through and just the ACK frame was lost. 3580 */ 3581 } 3582 3583 /* 3584 * It looks like the TX status for GO Negotiation Confirm is 3585 * often showing failure even when the peer has actually 3586 * received the frame. Since the peer may change channels 3587 * immediately after having received the frame, we may not see 3588 * an Ack for retries, so just dropping a single frame may 3589 * trigger this. To allow the group formation to succeed if the 3590 * peer did indeed receive the frame, continue regardless of 3591 * the TX status. 3592 */ 3593 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported"); 3594 } 3595 3596 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3597 3598 if (dev == NULL) 3599 return; 3600 3601 p2p_go_complete(p2p, dev); 3602} 3603 3604 3605void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 3606 const u8 *src, const u8 *bssid, 3607 enum p2p_send_action_result result) 3608{ 3609 enum p2p_pending_action_state state; 3610 int success; 3611 3612 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR 3613 " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)", 3614 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), 3615 MAC2STR(bssid), result, p2p_state_txt(p2p->state)); 3616 success = result == P2P_SEND_ACTION_SUCCESS; 3617 state = p2p->pending_action_state; 3618 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3619 switch (state) { 3620 case P2P_NO_PENDING_ACTION: 3621 if (p2p->send_action_in_progress) { 3622 p2p->send_action_in_progress = 0; 3623 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3624 } 3625 p2p_check_after_scan_tx_continuation(p2p); 3626 break; 3627 case P2P_PENDING_GO_NEG_REQUEST: 3628 p2p_go_neg_req_cb(p2p, success); 3629 break; 3630 case P2P_PENDING_GO_NEG_RESPONSE: 3631 p2p_go_neg_resp_cb(p2p, success); 3632 break; 3633 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE: 3634 p2p_go_neg_resp_failure_cb(p2p, success, dst); 3635 break; 3636 case P2P_PENDING_GO_NEG_CONFIRM: 3637 p2p_go_neg_conf_cb(p2p, result); 3638 break; 3639 case P2P_PENDING_SD: 3640 p2p_sd_cb(p2p, success); 3641 break; 3642 case P2P_PENDING_PD: 3643 p2p_prov_disc_cb(p2p, success); 3644 break; 3645 case P2P_PENDING_PD_RESPONSE: 3646 p2p_prov_disc_resp_cb(p2p, success); 3647 break; 3648 case P2P_PENDING_INVITATION_REQUEST: 3649 p2p_invitation_req_cb(p2p, success); 3650 break; 3651 case P2P_PENDING_INVITATION_RESPONSE: 3652 p2p_invitation_resp_cb(p2p, success); 3653 break; 3654 case P2P_PENDING_DEV_DISC_REQUEST: 3655 p2p_dev_disc_req_cb(p2p, success); 3656 break; 3657 case P2P_PENDING_DEV_DISC_RESPONSE: 3658 p2p_dev_disc_resp_cb(p2p, success); 3659 break; 3660 case P2P_PENDING_GO_DISC_REQ: 3661 p2p_go_disc_req_cb(p2p, success); 3662 break; 3663 } 3664 3665 p2p->after_scan_tx_in_progress = 0; 3666} 3667 3668 3669void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq, 3670 unsigned int duration) 3671{ 3672 if (freq == p2p->pending_client_disc_freq) { 3673 p2p_dbg(p2p, "Client discoverability remain-awake completed"); 3674 p2p->pending_client_disc_freq = 0; 3675 return; 3676 } 3677 3678 if (freq != p2p->pending_listen_freq) { 3679 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)", 3680 freq, duration, p2p->pending_listen_freq); 3681 return; 3682 } 3683 3684 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback", 3685 p2p->pending_listen_sec, p2p->pending_listen_usec, 3686 p2p->pending_listen_freq); 3687 p2p->in_listen = 1; 3688 p2p->drv_in_listen = freq; 3689 if (p2p->pending_listen_sec || p2p->pending_listen_usec) { 3690 /* 3691 * Add 20 msec extra wait to avoid race condition with driver 3692 * remain-on-channel end event, i.e., give driver more time to 3693 * complete the operation before our timeout expires. 3694 */ 3695 p2p_set_timeout(p2p, p2p->pending_listen_sec, 3696 p2p->pending_listen_usec + 20000); 3697 } 3698 3699 p2p->pending_listen_freq = 0; 3700} 3701 3702 3703int p2p_listen_end(struct p2p_data *p2p, unsigned int freq) 3704{ 3705 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq); 3706 p2p->drv_in_listen = 0; 3707 if (p2p->in_listen) 3708 return 0; /* Internal timeout will trigger the next step */ 3709 3710 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) { 3711 if (p2p->go_neg_peer->connect_reqs >= 120) { 3712 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3713 p2p_go_neg_failed(p2p, -1); 3714 return 0; 3715 } 3716 3717 p2p_set_state(p2p, P2P_CONNECT); 3718 p2p_connect_send(p2p, p2p->go_neg_peer); 3719 return 1; 3720 } else if (p2p->state == P2P_SEARCH) { 3721 if (p2p->p2p_scan_running) { 3722 /* 3723 * Search is already in progress. This can happen if 3724 * an Action frame RX is reported immediately after 3725 * the end of a remain-on-channel operation and the 3726 * response frame to that is sent using an offchannel 3727 * operation while in p2p_find. Avoid an attempt to 3728 * restart a scan here. 3729 */ 3730 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one"); 3731 return 1; 3732 } 3733 if (p2p->pending_listen_freq) { 3734 /* 3735 * Better wait a bit if the driver is unable to start 3736 * offchannel operation for some reason. p2p_search() 3737 * will be started from internal timeout. 3738 */ 3739 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop"); 3740 p2p_set_timeout(p2p, 0, 100000); 3741 return 1; 3742 } 3743 if (p2p->search_delay) { 3744 p2p_dbg(p2p, "Delay search operation by %u ms", 3745 p2p->search_delay); 3746 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3747 (p2p->search_delay % 1000) * 1000); 3748 return 1; 3749 } 3750 p2p_search(p2p); 3751 return 1; 3752 } 3753 3754 return 0; 3755} 3756 3757 3758static void p2p_timeout_connect(struct p2p_data *p2p) 3759{ 3760 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3761 if (p2p->go_neg_peer && 3762 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 3763 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed"); 3764 p2p_go_neg_failed(p2p, -1); 3765 return; 3766 } 3767 if (p2p->go_neg_peer && 3768 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) && 3769 p2p->go_neg_peer->connect_reqs < 120) { 3770 p2p_dbg(p2p, "Peer expected to wait our response - skip listen"); 3771 p2p_connect_send(p2p, p2p->go_neg_peer); 3772 return; 3773 } 3774 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) { 3775 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)"); 3776 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3777 p2p_set_timeout(p2p, 0, 30000); 3778 return; 3779 } 3780 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3781 p2p_listen_in_find(p2p, 0); 3782} 3783 3784 3785static void p2p_timeout_connect_listen(struct p2p_data *p2p) 3786{ 3787 if (p2p->go_neg_peer) { 3788 if (p2p->drv_in_listen) { 3789 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete"); 3790 return; 3791 } 3792 3793 if (p2p->go_neg_peer->connect_reqs >= 120) { 3794 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3795 p2p_go_neg_failed(p2p, -1); 3796 return; 3797 } 3798 3799 p2p_set_state(p2p, P2P_CONNECT); 3800 p2p_connect_send(p2p, p2p->go_neg_peer); 3801 } else 3802 p2p_set_state(p2p, P2P_IDLE); 3803} 3804 3805 3806static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p) 3807{ 3808 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 3809 3810 if (p2p->cfg->is_concurrent_session_active && 3811 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx)) 3812 p2p_set_timeout(p2p, 0, 500000); 3813 else 3814 p2p_set_timeout(p2p, 0, 200000); 3815} 3816 3817 3818static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p) 3819{ 3820 struct p2p_device *dev = p2p->go_neg_peer; 3821 3822 if (dev == NULL) { 3823 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait"); 3824 return; 3825 } 3826 3827 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation"); 3828 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT); 3829 p2p_listen_in_find(p2p, 0); 3830} 3831 3832 3833static void p2p_timeout_sd_during_find(struct p2p_data *p2p) 3834{ 3835 p2p_dbg(p2p, "Service Discovery Query timeout"); 3836 if (p2p->sd_peer) { 3837 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3838 p2p->sd_peer = NULL; 3839 } 3840 p2p_continue_find(p2p); 3841} 3842 3843 3844static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p) 3845{ 3846 p2p_dbg(p2p, "Provision Discovery Request timeout"); 3847 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3848 p2p_continue_find(p2p); 3849} 3850 3851 3852static void p2p_timeout_prov_disc_req(struct p2p_data *p2p) 3853{ 3854 u32 adv_id = 0; 3855 u8 *adv_mac = NULL; 3856 3857 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3858 3859 /* 3860 * For user initiated PD requests that we have not gotten any responses 3861 * for while in IDLE state, we retry them a couple of times before 3862 * giving up. 3863 */ 3864 if (!p2p->user_initiated_pd) 3865 return; 3866 3867 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout"); 3868 3869 if (p2p->pd_retries) { 3870 p2p->pd_retries--; 3871 p2p_retry_pd(p2p); 3872 } else { 3873 struct p2p_device *dev; 3874 int for_join = 0; 3875 3876 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3877 if (os_memcmp(p2p->pending_pd_devaddr, 3878 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3879 continue; 3880 if (dev->req_config_methods && 3881 (dev->flags & P2P_DEV_PD_FOR_JOIN)) 3882 for_join = 1; 3883 } 3884 3885 if (p2p->p2ps_prov) { 3886 adv_id = p2p->p2ps_prov->adv_id; 3887 adv_mac = p2p->p2ps_prov->adv_mac; 3888 } 3889 3890 if (p2p->cfg->prov_disc_fail) 3891 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, 3892 p2p->pending_pd_devaddr, 3893 for_join ? 3894 P2P_PROV_DISC_TIMEOUT_JOIN : 3895 P2P_PROV_DISC_TIMEOUT, 3896 adv_id, adv_mac, NULL); 3897 p2p_reset_pending_pd(p2p); 3898 } 3899} 3900 3901 3902static void p2p_timeout_invite(struct p2p_data *p2p) 3903{ 3904 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3905 p2p_set_state(p2p, P2P_INVITE_LISTEN); 3906 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 3907 /* 3908 * Better remain on operating channel instead of listen channel 3909 * when running a group. 3910 */ 3911 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel"); 3912 p2p_set_timeout(p2p, 0, 100000); 3913 return; 3914 } 3915 p2p_listen_in_find(p2p, 0); 3916} 3917 3918 3919static void p2p_timeout_invite_listen(struct p2p_data *p2p) 3920{ 3921 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) { 3922 p2p_set_state(p2p, P2P_INVITE); 3923 p2p_invite_send(p2p, p2p->invite_peer, 3924 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id); 3925 } else { 3926 if (p2p->invite_peer) { 3927 p2p_dbg(p2p, "Invitation Request retry limit reached"); 3928 if (p2p->cfg->invitation_result) 3929 p2p->cfg->invitation_result( 3930 p2p->cfg->cb_ctx, -1, NULL, NULL, 3931 p2p->invite_peer->info.p2p_device_addr, 3932 0, 0); 3933 } 3934 p2p_set_state(p2p, P2P_IDLE); 3935 } 3936} 3937 3938 3939static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx) 3940{ 3941 struct p2p_data *p2p = eloop_ctx; 3942 3943 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state)); 3944 3945 p2p->in_listen = 0; 3946 if (p2p->drv_in_listen) { 3947 p2p_dbg(p2p, "Driver is still in listen state - stop it"); 3948 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 3949 } 3950 3951 switch (p2p->state) { 3952 case P2P_IDLE: 3953 /* Check if we timed out waiting for PD req */ 3954 if (p2p->pending_action_state == P2P_PENDING_PD) 3955 p2p_timeout_prov_disc_req(p2p); 3956 break; 3957 case P2P_SEARCH: 3958 /* Check if we timed out waiting for PD req */ 3959 if (p2p->pending_action_state == P2P_PENDING_PD) 3960 p2p_timeout_prov_disc_req(p2p); 3961 if (p2p->search_delay && !p2p->in_search_delay) { 3962 p2p_dbg(p2p, "Delay search operation by %u ms", 3963 p2p->search_delay); 3964 p2p->in_search_delay = 1; 3965 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3966 (p2p->search_delay % 1000) * 1000); 3967 break; 3968 } 3969 p2p->in_search_delay = 0; 3970 p2p_search(p2p); 3971 break; 3972 case P2P_CONNECT: 3973 p2p_timeout_connect(p2p); 3974 break; 3975 case P2P_CONNECT_LISTEN: 3976 p2p_timeout_connect_listen(p2p); 3977 break; 3978 case P2P_GO_NEG: 3979 break; 3980 case P2P_LISTEN_ONLY: 3981 /* Check if we timed out waiting for PD req */ 3982 if (p2p->pending_action_state == P2P_PENDING_PD) 3983 p2p_timeout_prov_disc_req(p2p); 3984 3985 if (p2p->ext_listen_only) { 3986 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed"); 3987 p2p->ext_listen_only = 0; 3988 p2p_set_state(p2p, P2P_IDLE); 3989 } 3990 break; 3991 case P2P_WAIT_PEER_CONNECT: 3992 p2p_timeout_wait_peer_connect(p2p); 3993 break; 3994 case P2P_WAIT_PEER_IDLE: 3995 p2p_timeout_wait_peer_idle(p2p); 3996 break; 3997 case P2P_SD_DURING_FIND: 3998 p2p_timeout_sd_during_find(p2p); 3999 break; 4000 case P2P_PROVISIONING: 4001 break; 4002 case P2P_PD_DURING_FIND: 4003 p2p_timeout_prov_disc_during_find(p2p); 4004 break; 4005 case P2P_INVITE: 4006 p2p_timeout_invite(p2p); 4007 break; 4008 case P2P_INVITE_LISTEN: 4009 p2p_timeout_invite_listen(p2p); 4010 break; 4011 } 4012} 4013 4014 4015int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr) 4016{ 4017 struct p2p_device *dev; 4018 4019 dev = p2p_get_device(p2p, peer_addr); 4020 p2p_dbg(p2p, "Local request to reject connection attempts by peer " 4021 MACSTR, MAC2STR(peer_addr)); 4022 if (dev == NULL) { 4023 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr)); 4024 return -1; 4025 } 4026 dev->status = P2P_SC_FAIL_REJECTED_BY_USER; 4027 dev->flags |= P2P_DEV_USER_REJECTED; 4028 return 0; 4029} 4030 4031 4032const char * p2p_wps_method_text(enum p2p_wps_method method) 4033{ 4034 switch (method) { 4035 case WPS_NOT_READY: 4036 return "not-ready"; 4037 case WPS_PIN_DISPLAY: 4038 return "Display"; 4039 case WPS_PIN_KEYPAD: 4040 return "Keypad"; 4041 case WPS_PBC: 4042 return "PBC"; 4043 case WPS_NFC: 4044 return "NFC"; 4045 case WPS_P2PS: 4046 return "P2PS"; 4047 } 4048 4049 return "??"; 4050} 4051 4052 4053static const char * p2p_go_state_text(enum p2p_go_state go_state) 4054{ 4055 switch (go_state) { 4056 case UNKNOWN_GO: 4057 return "unknown"; 4058 case LOCAL_GO: 4059 return "local"; 4060 case REMOTE_GO: 4061 return "remote"; 4062 } 4063 4064 return "??"; 4065} 4066 4067 4068const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p, 4069 const u8 *addr, int next) 4070{ 4071 struct p2p_device *dev; 4072 4073 if (addr) 4074 dev = p2p_get_device(p2p, addr); 4075 else 4076 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4077 4078 if (dev && next) { 4079 dev = dl_list_first(&dev->list, struct p2p_device, list); 4080 if (&dev->list == &p2p->devices) 4081 dev = NULL; 4082 } 4083 4084 if (dev == NULL) 4085 return NULL; 4086 4087 return &dev->info; 4088} 4089 4090 4091int p2p_get_peer_info_txt(const struct p2p_peer_info *info, 4092 char *buf, size_t buflen) 4093{ 4094 struct p2p_device *dev; 4095 int res; 4096 char *pos, *end; 4097 struct os_reltime now; 4098 4099 if (info == NULL) 4100 return -1; 4101 4102 dev = (struct p2p_device *) (((u8 *) info) - 4103 offsetof(struct p2p_device, info)); 4104 4105 pos = buf; 4106 end = buf + buflen; 4107 4108 os_get_reltime(&now); 4109 res = os_snprintf(pos, end - pos, 4110 "age=%d\n" 4111 "listen_freq=%d\n" 4112 "wps_method=%s\n" 4113 "interface_addr=" MACSTR "\n" 4114 "member_in_go_dev=" MACSTR "\n" 4115 "member_in_go_iface=" MACSTR "\n" 4116 "go_neg_req_sent=%d\n" 4117 "go_state=%s\n" 4118 "dialog_token=%u\n" 4119 "intended_addr=" MACSTR "\n" 4120 "country=%c%c\n" 4121 "oper_freq=%d\n" 4122 "req_config_methods=0x%x\n" 4123 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n" 4124 "status=%d\n" 4125 "invitation_reqs=%u\n", 4126 (int) (now.sec - dev->last_seen.sec), 4127 dev->listen_freq, 4128 p2p_wps_method_text(dev->wps_method), 4129 MAC2STR(dev->interface_addr), 4130 MAC2STR(dev->member_in_go_dev), 4131 MAC2STR(dev->member_in_go_iface), 4132 dev->go_neg_req_sent, 4133 p2p_go_state_text(dev->go_state), 4134 dev->dialog_token, 4135 MAC2STR(dev->intended_addr), 4136 dev->country[0] ? dev->country[0] : '_', 4137 dev->country[1] ? dev->country[1] : '_', 4138 dev->oper_freq, 4139 dev->req_config_methods, 4140 dev->flags & P2P_DEV_PROBE_REQ_ONLY ? 4141 "[PROBE_REQ_ONLY]" : "", 4142 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "", 4143 dev->flags & P2P_DEV_NOT_YET_READY ? 4144 "[NOT_YET_READY]" : "", 4145 dev->flags & P2P_DEV_PD_PEER_DISPLAY ? 4146 "[PD_PEER_DISPLAY]" : "", 4147 dev->flags & P2P_DEV_PD_PEER_KEYPAD ? 4148 "[PD_PEER_KEYPAD]" : "", 4149 dev->flags & P2P_DEV_PD_PEER_P2PS ? 4150 "[PD_PEER_P2PS]" : "", 4151 dev->flags & P2P_DEV_USER_REJECTED ? 4152 "[USER_REJECTED]" : "", 4153 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ? 4154 "[PEER_WAITING_RESPONSE]" : "", 4155 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ? 4156 "[PREFER_PERSISTENT_GROUP]" : "", 4157 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ? 4158 "[WAIT_GO_NEG_RESPONSE]" : "", 4159 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ? 4160 "[WAIT_GO_NEG_CONFIRM]" : "", 4161 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ? 4162 "[GROUP_CLIENT_ONLY]" : "", 4163 dev->flags & P2P_DEV_FORCE_FREQ ? 4164 "[FORCE_FREQ]" : "", 4165 dev->flags & P2P_DEV_PD_FOR_JOIN ? 4166 "[PD_FOR_JOIN]" : "", 4167 dev->status, 4168 dev->invitation_reqs); 4169 if (os_snprintf_error(end - pos, res)) 4170 return pos - buf; 4171 pos += res; 4172 4173 if (dev->ext_listen_period) { 4174 res = os_snprintf(pos, end - pos, 4175 "ext_listen_period=%u\n" 4176 "ext_listen_interval=%u\n", 4177 dev->ext_listen_period, 4178 dev->ext_listen_interval); 4179 if (os_snprintf_error(end - pos, res)) 4180 return pos - buf; 4181 pos += res; 4182 } 4183 4184 if (dev->oper_ssid_len) { 4185 res = os_snprintf(pos, end - pos, 4186 "oper_ssid=%s\n", 4187 wpa_ssid_txt(dev->oper_ssid, 4188 dev->oper_ssid_len)); 4189 if (os_snprintf_error(end - pos, res)) 4190 return pos - buf; 4191 pos += res; 4192 } 4193 4194#ifdef CONFIG_WIFI_DISPLAY 4195 if (dev->info.wfd_subelems) { 4196 res = os_snprintf(pos, end - pos, "wfd_subelems="); 4197 if (os_snprintf_error(end - pos, res)) 4198 return pos - buf; 4199 pos += res; 4200 4201 pos += wpa_snprintf_hex(pos, end - pos, 4202 wpabuf_head(dev->info.wfd_subelems), 4203 wpabuf_len(dev->info.wfd_subelems)); 4204 4205 res = os_snprintf(pos, end - pos, "\n"); 4206 if (os_snprintf_error(end - pos, res)) 4207 return pos - buf; 4208 pos += res; 4209 } 4210#endif /* CONFIG_WIFI_DISPLAY */ 4211 4212 return pos - buf; 4213} 4214 4215 4216int p2p_peer_known(struct p2p_data *p2p, const u8 *addr) 4217{ 4218 return p2p_get_device(p2p, addr) != NULL; 4219} 4220 4221 4222void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled) 4223{ 4224 if (enabled) { 4225 p2p_dbg(p2p, "Client discoverability enabled"); 4226 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 4227 } else { 4228 p2p_dbg(p2p, "Client discoverability disabled"); 4229 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 4230 } 4231} 4232 4233 4234static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1, 4235 u32 duration2, u32 interval2) 4236{ 4237 struct wpabuf *req; 4238 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL; 4239 u8 *len; 4240 4241 req = wpabuf_alloc(100); 4242 if (req == NULL) 4243 return NULL; 4244 4245 if (duration1 || interval1) { 4246 os_memset(&desc1, 0, sizeof(desc1)); 4247 desc1.count_type = 1; 4248 desc1.duration = duration1; 4249 desc1.interval = interval1; 4250 ptr1 = &desc1; 4251 4252 if (duration2 || interval2) { 4253 os_memset(&desc2, 0, sizeof(desc2)); 4254 desc2.count_type = 2; 4255 desc2.duration = duration2; 4256 desc2.interval = interval2; 4257 ptr2 = &desc2; 4258 } 4259 } 4260 4261 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1); 4262 len = p2p_buf_add_ie_hdr(req); 4263 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2); 4264 p2p_buf_update_ie_hdr(req, len); 4265 4266 return req; 4267} 4268 4269 4270int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr, 4271 const u8 *own_interface_addr, unsigned int freq, 4272 u32 duration1, u32 interval1, u32 duration2, 4273 u32 interval2) 4274{ 4275 struct wpabuf *req; 4276 4277 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR 4278 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u " 4279 "dur2=%u int2=%u", 4280 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr), 4281 freq, duration1, interval1, duration2, interval2); 4282 4283 req = p2p_build_presence_req(duration1, interval1, duration2, 4284 interval2); 4285 if (req == NULL) 4286 return -1; 4287 4288 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 4289 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr, 4290 go_interface_addr, 4291 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 4292 p2p_dbg(p2p, "Failed to send Action frame"); 4293 } 4294 wpabuf_free(req); 4295 4296 return 0; 4297} 4298 4299 4300static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa, 4301 size_t noa_len, u8 dialog_token) 4302{ 4303 struct wpabuf *resp; 4304 u8 *len; 4305 4306 resp = wpabuf_alloc(100 + noa_len); 4307 if (resp == NULL) 4308 return NULL; 4309 4310 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token); 4311 len = p2p_buf_add_ie_hdr(resp); 4312 p2p_buf_add_status(resp, status); 4313 if (noa) { 4314 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE); 4315 wpabuf_put_le16(resp, noa_len); 4316 wpabuf_put_data(resp, noa, noa_len); 4317 } else 4318 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL); 4319 p2p_buf_update_ie_hdr(resp, len); 4320 4321 return resp; 4322} 4323 4324 4325static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 4326 const u8 *sa, const u8 *data, size_t len, 4327 int rx_freq) 4328{ 4329 struct p2p_message msg; 4330 u8 status; 4331 struct wpabuf *resp; 4332 size_t g; 4333 struct p2p_group *group = NULL; 4334 int parsed = 0; 4335 u8 noa[50]; 4336 int noa_len; 4337 4338 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request"); 4339 4340 for (g = 0; g < p2p->num_groups; g++) { 4341 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]), 4342 ETH_ALEN) == 0) { 4343 group = p2p->groups[g]; 4344 break; 4345 } 4346 } 4347 if (group == NULL) { 4348 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group " 4349 MACSTR, MAC2STR(da)); 4350 return; 4351 } 4352 4353 if (p2p_parse(data, len, &msg) < 0) { 4354 p2p_dbg(p2p, "Failed to parse P2P Presence Request"); 4355 status = P2P_SC_FAIL_INVALID_PARAMS; 4356 goto fail; 4357 } 4358 parsed = 1; 4359 4360 if (msg.noa == NULL) { 4361 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request"); 4362 status = P2P_SC_FAIL_INVALID_PARAMS; 4363 goto fail; 4364 } 4365 4366 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len); 4367 4368fail: 4369 if (p2p->cfg->get_noa) 4370 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa, 4371 sizeof(noa)); 4372 else 4373 noa_len = -1; 4374 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL, 4375 noa_len > 0 ? noa_len : 0, 4376 msg.dialog_token); 4377 if (parsed) 4378 p2p_parse_free(&msg); 4379 if (resp == NULL) 4380 return; 4381 4382 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 4383 if (p2p_send_action(p2p, rx_freq, sa, da, da, 4384 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 4385 p2p_dbg(p2p, "Failed to send Action frame"); 4386 } 4387 wpabuf_free(resp); 4388} 4389 4390 4391static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 4392 const u8 *sa, const u8 *data, size_t len) 4393{ 4394 struct p2p_message msg; 4395 4396 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response"); 4397 4398 if (p2p_parse(data, len, &msg) < 0) { 4399 p2p_dbg(p2p, "Failed to parse P2P Presence Response"); 4400 return; 4401 } 4402 4403 if (msg.status == NULL || msg.noa == NULL) { 4404 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response"); 4405 p2p_parse_free(&msg); 4406 return; 4407 } 4408 4409 if (p2p->cfg->presence_resp) { 4410 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status, 4411 msg.noa, msg.noa_len); 4412 } 4413 4414 if (*msg.status) { 4415 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u", 4416 *msg.status); 4417 p2p_parse_free(&msg); 4418 return; 4419 } 4420 4421 p2p_dbg(p2p, "P2P Presence Request was accepted"); 4422 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA", 4423 msg.noa, msg.noa_len); 4424 /* TODO: process NoA */ 4425 p2p_parse_free(&msg); 4426} 4427 4428 4429static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx) 4430{ 4431 struct p2p_data *p2p = eloop_ctx; 4432 4433 if (p2p->ext_listen_interval) { 4434 /* Schedule next extended listen timeout */ 4435 eloop_register_timeout(p2p->ext_listen_interval_sec, 4436 p2p->ext_listen_interval_usec, 4437 p2p_ext_listen_timeout, p2p, NULL); 4438 } 4439 4440 if ((p2p->cfg->is_p2p_in_progress && 4441 p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) || 4442 (p2p->pending_action_state == P2P_PENDING_PD && 4443 p2p->pd_retries > 0)) { 4444 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)", 4445 p2p_state_txt(p2p->state)); 4446 return; 4447 } 4448 4449 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) { 4450 /* 4451 * This should not really happen, but it looks like the Listen 4452 * command may fail is something else (e.g., a scan) was 4453 * running at an inconvenient time. As a workaround, allow new 4454 * Extended Listen operation to be started. 4455 */ 4456 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again"); 4457 p2p->ext_listen_only = 0; 4458 p2p_set_state(p2p, P2P_IDLE); 4459 } 4460 4461 if (p2p->state != P2P_IDLE) { 4462 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state)); 4463 return; 4464 } 4465 4466 p2p_dbg(p2p, "Extended Listen timeout"); 4467 p2p->ext_listen_only = 1; 4468 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) { 4469 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing"); 4470 p2p->ext_listen_only = 0; 4471 } 4472} 4473 4474 4475int p2p_ext_listen(struct p2p_data *p2p, unsigned int period, 4476 unsigned int interval) 4477{ 4478 if (period > 65535 || interval > 65535 || period > interval || 4479 (period == 0 && interval > 0) || (period > 0 && interval == 0)) { 4480 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u", 4481 period, interval); 4482 return -1; 4483 } 4484 4485 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 4486 4487 if (interval == 0) { 4488 p2p_dbg(p2p, "Disabling Extended Listen Timing"); 4489 p2p->ext_listen_period = 0; 4490 p2p->ext_listen_interval = 0; 4491 return 0; 4492 } 4493 4494 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec", 4495 period, interval); 4496 p2p->ext_listen_period = period; 4497 p2p->ext_listen_interval = interval; 4498 p2p->ext_listen_interval_sec = interval / 1000; 4499 p2p->ext_listen_interval_usec = (interval % 1000) * 1000; 4500 4501 eloop_register_timeout(p2p->ext_listen_interval_sec, 4502 p2p->ext_listen_interval_usec, 4503 p2p_ext_listen_timeout, p2p, NULL); 4504 4505 return 0; 4506} 4507 4508 4509void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 4510 const u8 *ie, size_t ie_len) 4511{ 4512 struct p2p_message msg; 4513 4514 if (bssid == NULL || ie == NULL) 4515 return; 4516 4517 os_memset(&msg, 0, sizeof(msg)); 4518 if (p2p_parse_ies(ie, ie_len, &msg)) 4519 return; 4520 if (msg.minor_reason_code == NULL) { 4521 p2p_parse_free(&msg); 4522 return; 4523 } 4524 4525 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR 4526 " reason_code=%u minor_reason_code=%u", 4527 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4528 4529 p2p_parse_free(&msg); 4530} 4531 4532 4533void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 4534 const u8 *ie, size_t ie_len) 4535{ 4536 struct p2p_message msg; 4537 4538 if (bssid == NULL || ie == NULL) 4539 return; 4540 4541 os_memset(&msg, 0, sizeof(msg)); 4542 if (p2p_parse_ies(ie, ie_len, &msg)) 4543 return; 4544 if (msg.minor_reason_code == NULL) { 4545 p2p_parse_free(&msg); 4546 return; 4547 } 4548 4549 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR 4550 " reason_code=%u minor_reason_code=%u", 4551 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4552 4553 p2p_parse_free(&msg); 4554} 4555 4556 4557void p2p_set_managed_oper(struct p2p_data *p2p, int enabled) 4558{ 4559 if (enabled) { 4560 p2p_dbg(p2p, "Managed P2P Device operations enabled"); 4561 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED; 4562 } else { 4563 p2p_dbg(p2p, "Managed P2P Device operations disabled"); 4564 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED; 4565 } 4566} 4567 4568 4569int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class, 4570 u8 *op_channel) 4571{ 4572 return p2p_channel_random_social(&p2p->channels, op_class, op_channel); 4573} 4574 4575 4576int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel, 4577 u8 forced) 4578{ 4579 if (p2p_channel_to_freq(reg_class, channel) < 0) 4580 return -1; 4581 4582 /* 4583 * Listen channel was set in configuration or set by control interface; 4584 * cannot override it. 4585 */ 4586 if (p2p->cfg->channel_forced && forced == 0) { 4587 p2p_dbg(p2p, 4588 "Listen channel was previously configured - do not override based on optimization"); 4589 return -1; 4590 } 4591 4592 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u", 4593 reg_class, channel); 4594 4595 if (p2p->state == P2P_IDLE) { 4596 p2p->cfg->reg_class = reg_class; 4597 p2p->cfg->channel = channel; 4598 p2p->cfg->channel_forced = forced; 4599 } else { 4600 p2p_dbg(p2p, "Defer setting listen channel"); 4601 p2p->pending_reg_class = reg_class; 4602 p2p->pending_channel = channel; 4603 p2p->pending_channel_forced = forced; 4604 } 4605 4606 return 0; 4607} 4608 4609 4610u8 p2p_get_listen_channel(struct p2p_data *p2p) 4611{ 4612 return p2p->cfg->channel; 4613} 4614 4615 4616int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len) 4617{ 4618 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len)); 4619 if (postfix == NULL) { 4620 p2p->cfg->ssid_postfix_len = 0; 4621 return 0; 4622 } 4623 if (len > sizeof(p2p->cfg->ssid_postfix)) 4624 return -1; 4625 os_memcpy(p2p->cfg->ssid_postfix, postfix, len); 4626 p2p->cfg->ssid_postfix_len = len; 4627 return 0; 4628} 4629 4630 4631int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel, 4632 int cfg_op_channel) 4633{ 4634 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0) 4635 return -1; 4636 4637 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u", 4638 op_reg_class, op_channel); 4639 p2p->cfg->op_reg_class = op_reg_class; 4640 p2p->cfg->op_channel = op_channel; 4641 p2p->cfg->cfg_op_channel = cfg_op_channel; 4642 return 0; 4643} 4644 4645 4646int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan, 4647 const struct p2p_channel *pref_chan) 4648{ 4649 struct p2p_channel *n; 4650 4651 if (pref_chan) { 4652 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel)); 4653 if (n == NULL) 4654 return -1; 4655 os_memcpy(n, pref_chan, 4656 num_pref_chan * sizeof(struct p2p_channel)); 4657 } else 4658 n = NULL; 4659 4660 os_free(p2p->cfg->pref_chan); 4661 p2p->cfg->pref_chan = n; 4662 p2p->cfg->num_pref_chan = num_pref_chan; 4663 4664 return 0; 4665} 4666 4667 4668int p2p_set_no_go_freq(struct p2p_data *p2p, 4669 const struct wpa_freq_range_list *list) 4670{ 4671 struct wpa_freq_range *tmp; 4672 4673 if (list == NULL || list->num == 0) { 4674 os_free(p2p->no_go_freq.range); 4675 p2p->no_go_freq.range = NULL; 4676 p2p->no_go_freq.num = 0; 4677 return 0; 4678 } 4679 4680 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range)); 4681 if (tmp == NULL) 4682 return -1; 4683 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range)); 4684 os_free(p2p->no_go_freq.range); 4685 p2p->no_go_freq.range = tmp; 4686 p2p->no_go_freq.num = list->num; 4687 p2p_dbg(p2p, "Updated no GO chan list"); 4688 4689 return 0; 4690} 4691 4692 4693int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr, 4694 u8 *iface_addr) 4695{ 4696 struct p2p_device *dev = p2p_get_device(p2p, dev_addr); 4697 if (dev == NULL || is_zero_ether_addr(dev->interface_addr)) 4698 return -1; 4699 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN); 4700 return 0; 4701} 4702 4703 4704int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr, 4705 u8 *dev_addr) 4706{ 4707 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4708 if (dev == NULL) 4709 return -1; 4710 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN); 4711 return 0; 4712} 4713 4714 4715void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr) 4716{ 4717 os_memcpy(p2p->peer_filter, addr, ETH_ALEN); 4718 if (is_zero_ether_addr(p2p->peer_filter)) 4719 p2p_dbg(p2p, "Disable peer filter"); 4720 else 4721 p2p_dbg(p2p, "Enable peer filter for " MACSTR, 4722 MAC2STR(p2p->peer_filter)); 4723} 4724 4725 4726void p2p_set_cross_connect(struct p2p_data *p2p, int enabled) 4727{ 4728 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled"); 4729 if (p2p->cross_connect == enabled) 4730 return; 4731 p2p->cross_connect = enabled; 4732 /* TODO: may need to tear down any action group where we are GO(?) */ 4733} 4734 4735 4736int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr) 4737{ 4738 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4739 if (dev == NULL) 4740 return -1; 4741 if (dev->oper_freq <= 0) 4742 return -1; 4743 return dev->oper_freq; 4744} 4745 4746 4747void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled) 4748{ 4749 p2p_dbg(p2p, "Intra BSS distribution %s", 4750 enabled ? "enabled" : "disabled"); 4751 p2p->cfg->p2p_intra_bss = enabled; 4752} 4753 4754 4755void p2p_update_channel_list(struct p2p_data *p2p, 4756 const struct p2p_channels *chan, 4757 const struct p2p_channels *cli_chan) 4758{ 4759 p2p_dbg(p2p, "Update channel list"); 4760 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels)); 4761 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 4762 os_memcpy(&p2p->cfg->cli_channels, cli_chan, 4763 sizeof(struct p2p_channels)); 4764 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 4765} 4766 4767 4768int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 4769 const u8 *src, const u8 *bssid, const u8 *buf, 4770 size_t len, unsigned int wait_time) 4771{ 4772 if (p2p->p2p_scan_running) { 4773 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes"); 4774 if (p2p->after_scan_tx) { 4775 p2p_dbg(p2p, "Dropped previous pending Action frame TX"); 4776 os_free(p2p->after_scan_tx); 4777 } 4778 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) + 4779 len); 4780 if (p2p->after_scan_tx == NULL) 4781 return -1; 4782 p2p->after_scan_tx->freq = freq; 4783 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN); 4784 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN); 4785 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN); 4786 p2p->after_scan_tx->len = len; 4787 p2p->after_scan_tx->wait_time = wait_time; 4788 os_memcpy(p2p->after_scan_tx + 1, buf, len); 4789 return 0; 4790 } 4791 4792 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid, 4793 buf, len, wait_time); 4794} 4795 4796 4797void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5, 4798 int freq_overall) 4799{ 4800 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d", 4801 freq_24, freq_5, freq_overall); 4802 p2p->best_freq_24 = freq_24; 4803 p2p->best_freq_5 = freq_5; 4804 p2p->best_freq_overall = freq_overall; 4805} 4806 4807 4808void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq) 4809{ 4810 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq); 4811 p2p->own_freq_preference = freq; 4812} 4813 4814 4815const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p) 4816{ 4817 if (p2p == NULL || p2p->go_neg_peer == NULL) 4818 return NULL; 4819 return p2p->go_neg_peer->info.p2p_device_addr; 4820} 4821 4822 4823const struct p2p_peer_info * 4824p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next) 4825{ 4826 struct p2p_device *dev; 4827 4828 if (addr) { 4829 dev = p2p_get_device(p2p, addr); 4830 if (!dev) 4831 return NULL; 4832 4833 if (!next) { 4834 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 4835 return NULL; 4836 4837 return &dev->info; 4838 } else { 4839 do { 4840 dev = dl_list_first(&dev->list, 4841 struct p2p_device, 4842 list); 4843 if (!dev || &dev->list == &p2p->devices) 4844 return NULL; 4845 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY); 4846 } 4847 } else { 4848 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4849 if (!dev) 4850 return NULL; 4851 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 4852 dev = dl_list_first(&dev->list, 4853 struct p2p_device, 4854 list); 4855 if (!dev || &dev->list == &p2p->devices) 4856 return NULL; 4857 } 4858 } 4859 4860 return &dev->info; 4861} 4862 4863 4864int p2p_in_progress(struct p2p_data *p2p) 4865{ 4866 if (p2p == NULL) 4867 return 0; 4868 if (p2p->state == P2P_SEARCH) 4869 return 2; 4870 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING; 4871} 4872 4873 4874void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout, 4875 u8 client_timeout) 4876{ 4877 if (p2p) { 4878 p2p->go_timeout = go_timeout; 4879 p2p->client_timeout = client_timeout; 4880 } 4881} 4882 4883 4884#ifdef CONFIG_WIFI_DISPLAY 4885 4886static void p2p_update_wfd_ie_groups(struct p2p_data *p2p) 4887{ 4888 size_t g; 4889 struct p2p_group *group; 4890 4891 for (g = 0; g < p2p->num_groups; g++) { 4892 group = p2p->groups[g]; 4893 p2p_group_force_beacon_update_ies(group); 4894 } 4895} 4896 4897 4898int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie) 4899{ 4900 wpabuf_free(p2p->wfd_ie_beacon); 4901 p2p->wfd_ie_beacon = ie; 4902 p2p_update_wfd_ie_groups(p2p); 4903 return 0; 4904} 4905 4906 4907int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie) 4908{ 4909 wpabuf_free(p2p->wfd_ie_probe_req); 4910 p2p->wfd_ie_probe_req = ie; 4911 return 0; 4912} 4913 4914 4915int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie) 4916{ 4917 wpabuf_free(p2p->wfd_ie_probe_resp); 4918 p2p->wfd_ie_probe_resp = ie; 4919 p2p_update_wfd_ie_groups(p2p); 4920 return 0; 4921} 4922 4923 4924int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie) 4925{ 4926 wpabuf_free(p2p->wfd_ie_assoc_req); 4927 p2p->wfd_ie_assoc_req = ie; 4928 return 0; 4929} 4930 4931 4932int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie) 4933{ 4934 wpabuf_free(p2p->wfd_ie_invitation); 4935 p2p->wfd_ie_invitation = ie; 4936 return 0; 4937} 4938 4939 4940int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie) 4941{ 4942 wpabuf_free(p2p->wfd_ie_prov_disc_req); 4943 p2p->wfd_ie_prov_disc_req = ie; 4944 return 0; 4945} 4946 4947 4948int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie) 4949{ 4950 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 4951 p2p->wfd_ie_prov_disc_resp = ie; 4952 return 0; 4953} 4954 4955 4956int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie) 4957{ 4958 wpabuf_free(p2p->wfd_ie_go_neg); 4959 p2p->wfd_ie_go_neg = ie; 4960 return 0; 4961} 4962 4963 4964int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem) 4965{ 4966 wpabuf_free(p2p->wfd_dev_info); 4967 if (elem) { 4968 p2p->wfd_dev_info = wpabuf_dup(elem); 4969 if (p2p->wfd_dev_info == NULL) 4970 return -1; 4971 } else 4972 p2p->wfd_dev_info = NULL; 4973 4974 return 0; 4975} 4976 4977 4978int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem) 4979{ 4980 wpabuf_free(p2p->wfd_assoc_bssid); 4981 if (elem) { 4982 p2p->wfd_assoc_bssid = wpabuf_dup(elem); 4983 if (p2p->wfd_assoc_bssid == NULL) 4984 return -1; 4985 } else 4986 p2p->wfd_assoc_bssid = NULL; 4987 4988 return 0; 4989} 4990 4991 4992int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p, 4993 const struct wpabuf *elem) 4994{ 4995 wpabuf_free(p2p->wfd_coupled_sink_info); 4996 if (elem) { 4997 p2p->wfd_coupled_sink_info = wpabuf_dup(elem); 4998 if (p2p->wfd_coupled_sink_info == NULL) 4999 return -1; 5000 } else 5001 p2p->wfd_coupled_sink_info = NULL; 5002 5003 return 0; 5004} 5005 5006#endif /* CONFIG_WIFI_DISPLAY */ 5007 5008 5009int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int, 5010 int max_disc_tu) 5011{ 5012 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0) 5013 return -1; 5014 5015 p2p->min_disc_int = min_disc_int; 5016 p2p->max_disc_int = max_disc_int; 5017 p2p->max_disc_tu = max_disc_tu; 5018 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d", 5019 min_disc_int, max_disc_int, max_disc_tu); 5020 5021 return 0; 5022} 5023 5024 5025void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...) 5026{ 5027 va_list ap; 5028 char buf[500]; 5029 5030 if (!p2p->cfg->debug_print) 5031 return; 5032 5033 va_start(ap, fmt); 5034 vsnprintf(buf, sizeof(buf), fmt, ap); 5035 buf[sizeof(buf) - 1] = '\0'; 5036 va_end(ap); 5037 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf); 5038} 5039 5040 5041void p2p_info(struct p2p_data *p2p, const char *fmt, ...) 5042{ 5043 va_list ap; 5044 char buf[500]; 5045 5046 if (!p2p->cfg->debug_print) 5047 return; 5048 5049 va_start(ap, fmt); 5050 vsnprintf(buf, sizeof(buf), fmt, ap); 5051 buf[sizeof(buf) - 1] = '\0'; 5052 va_end(ap); 5053 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf); 5054} 5055 5056 5057void p2p_err(struct p2p_data *p2p, const char *fmt, ...) 5058{ 5059 va_list ap; 5060 char buf[500]; 5061 5062 if (!p2p->cfg->debug_print) 5063 return; 5064 5065 va_start(ap, fmt); 5066 vsnprintf(buf, sizeof(buf), fmt, ap); 5067 buf[sizeof(buf) - 1] = '\0'; 5068 va_end(ap); 5069 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf); 5070} 5071 5072 5073void p2p_loop_on_known_peers(struct p2p_data *p2p, 5074 void (*peer_callback)(struct p2p_peer_info *peer, 5075 void *user_data), 5076 void *user_data) 5077{ 5078 struct p2p_device *dev, *n; 5079 5080 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) { 5081 peer_callback(&dev->info, user_data); 5082 } 5083} 5084 5085 5086#ifdef CONFIG_WPS_NFC 5087 5088static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p, 5089 int client_freq, 5090 const u8 *go_dev_addr, 5091 const u8 *ssid, size_t ssid_len) 5092{ 5093 struct wpabuf *buf; 5094 u8 op_class, channel; 5095 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP; 5096 5097 buf = wpabuf_alloc(1000); 5098 if (buf == NULL) 5099 return NULL; 5100 5101 op_class = p2p->cfg->reg_class; 5102 channel = p2p->cfg->channel; 5103 5104 p2p_buf_add_capability(buf, p2p->dev_capab & 5105 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 5106 p2p_buf_add_device_info(buf, p2p, NULL); 5107 5108 if (p2p->num_groups > 0) { 5109 int freq = p2p_group_get_freq(p2p->groups[0]); 5110 role = P2P_GO_IN_A_GROUP; 5111 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) { 5112 p2p_dbg(p2p, 5113 "Unknown GO operating frequency %d MHz for NFC handover", 5114 freq); 5115 wpabuf_free(buf); 5116 return NULL; 5117 } 5118 } else if (client_freq > 0) { 5119 role = P2P_CLIENT_IN_A_GROUP; 5120 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) { 5121 p2p_dbg(p2p, 5122 "Unknown client operating frequency %d MHz for NFC handover", 5123 client_freq); 5124 wpabuf_free(buf); 5125 return NULL; 5126 } 5127 } 5128 5129 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class, 5130 channel, role); 5131 5132 if (p2p->num_groups > 0) { 5133 /* Limit number of clients to avoid very long message */ 5134 p2p_buf_add_group_info(p2p->groups[0], buf, 5); 5135 p2p_group_buf_add_id(p2p->groups[0], buf); 5136 } else if (client_freq > 0 && 5137 go_dev_addr && !is_zero_ether_addr(go_dev_addr) && 5138 ssid && ssid_len > 0) { 5139 /* 5140 * Add the optional P2P Group ID to indicate in which group this 5141 * device is a P2P Client. 5142 */ 5143 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len); 5144 } 5145 5146 return buf; 5147} 5148 5149 5150struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p, 5151 int client_freq, 5152 const u8 *go_dev_addr, 5153 const u8 *ssid, size_t ssid_len) 5154{ 5155 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 5156 ssid_len); 5157} 5158 5159 5160struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p, 5161 int client_freq, 5162 const u8 *go_dev_addr, 5163 const u8 *ssid, size_t ssid_len) 5164{ 5165 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 5166 ssid_len); 5167} 5168 5169 5170int p2p_process_nfc_connection_handover(struct p2p_data *p2p, 5171 struct p2p_nfc_params *params) 5172{ 5173 struct p2p_message msg; 5174 struct p2p_device *dev; 5175 const u8 *p2p_dev_addr; 5176 int freq; 5177 enum p2p_role_indication role; 5178 5179 params->next_step = NO_ACTION; 5180 5181 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len, 5182 params->p2p_attr, params->p2p_len, &msg)) { 5183 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC"); 5184 p2p_parse_free(&msg); 5185 return -1; 5186 } 5187 5188 if (msg.p2p_device_addr) 5189 p2p_dev_addr = msg.p2p_device_addr; 5190 else if (msg.device_id) 5191 p2p_dev_addr = msg.device_id; 5192 else { 5193 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 5194 p2p_parse_free(&msg); 5195 return -1; 5196 } 5197 5198 if (msg.oob_dev_password) { 5199 os_memcpy(params->oob_dev_pw, msg.oob_dev_password, 5200 msg.oob_dev_password_len); 5201 params->oob_dev_pw_len = msg.oob_dev_password_len; 5202 } 5203 5204 dev = p2p_create_device(p2p, p2p_dev_addr); 5205 if (dev == NULL) { 5206 p2p_parse_free(&msg); 5207 return -1; 5208 } 5209 5210 params->peer = &dev->info; 5211 5212 os_get_reltime(&dev->last_seen); 5213 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 5214 p2p_copy_wps_info(p2p, dev, 0, &msg); 5215 5216 if (!msg.oob_go_neg_channel) { 5217 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included"); 5218 return -1; 5219 } 5220 5221 if (msg.oob_go_neg_channel[3] == 0 && 5222 msg.oob_go_neg_channel[4] == 0) 5223 freq = 0; 5224 else 5225 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3], 5226 msg.oob_go_neg_channel[4]); 5227 if (freq < 0) { 5228 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel"); 5229 return -1; 5230 } 5231 role = msg.oob_go_neg_channel[5]; 5232 5233 if (role == P2P_GO_IN_A_GROUP) { 5234 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq); 5235 params->go_freq = freq; 5236 } else if (role == P2P_CLIENT_IN_A_GROUP) { 5237 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz", 5238 freq); 5239 params->go_freq = freq; 5240 } else 5241 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq); 5242 dev->oob_go_neg_freq = freq; 5243 5244 if (!params->sel && role != P2P_GO_IN_A_GROUP) { 5245 freq = p2p_channel_to_freq(p2p->cfg->reg_class, 5246 p2p->cfg->channel); 5247 if (freq < 0) { 5248 p2p_dbg(p2p, "Own listen channel not known"); 5249 return -1; 5250 } 5251 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq); 5252 dev->oob_go_neg_freq = freq; 5253 } 5254 5255 if (msg.group_id) { 5256 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN); 5257 params->go_ssid_len = msg.group_id_len - ETH_ALEN; 5258 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN, 5259 params->go_ssid_len); 5260 } 5261 5262 if (dev->flags & P2P_DEV_USER_REJECTED) { 5263 p2p_dbg(p2p, "Do not report rejected device"); 5264 p2p_parse_free(&msg); 5265 return 0; 5266 } 5267 5268 if (!(dev->flags & P2P_DEV_REPORTED)) { 5269 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info, 5270 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 5271 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 5272 } 5273 p2p_parse_free(&msg); 5274 5275 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0) 5276 params->next_step = BOTH_GO; 5277 else if (role == P2P_GO_IN_A_GROUP) 5278 params->next_step = JOIN_GROUP; 5279 else if (role == P2P_CLIENT_IN_A_GROUP) { 5280 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 5281 params->next_step = PEER_CLIENT; 5282 } else if (p2p->num_groups > 0) 5283 params->next_step = AUTH_JOIN; 5284 else if (params->sel) 5285 params->next_step = INIT_GO_NEG; 5286 else 5287 params->next_step = RESP_GO_NEG; 5288 5289 return 0; 5290} 5291 5292 5293void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id, 5294 int go_intent, 5295 const u8 *own_interface_addr) 5296{ 5297 5298 p2p->authorized_oob_dev_pw_id = dev_pw_id; 5299 if (dev_pw_id == 0) { 5300 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover"); 5301 return; 5302 } 5303 5304 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover", 5305 dev_pw_id); 5306 5307 p2p->go_intent = go_intent; 5308 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 5309} 5310 5311#endif /* CONFIG_WPS_NFC */ 5312 5313 5314int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len) 5315{ 5316 if (len < 8 || len > 63) 5317 return -1; 5318 p2p->cfg->passphrase_len = len; 5319 return 0; 5320} 5321 5322 5323void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem) 5324{ 5325 p2p->vendor_elem = vendor_elem; 5326} 5327 5328 5329void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx) 5330{ 5331 struct p2p_data *p2p = eloop_ctx; 5332 5333 p2p_dbg(p2p, 5334 "Timeout on waiting peer to become ready for GO Negotiation"); 5335 p2p_go_neg_failed(p2p, -1); 5336} 5337