p2p.c revision 216983bceec7c450951e2fbcd076b5c75d432e57
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) 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 case P2P_FIND_PROGRESSIVE: 1234 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0, 1235 p2p->num_req_dev_types, 1236 p2p->req_dev_types, dev_id, 1237 DEV_PW_DEFAULT); 1238 break; 1239 case P2P_FIND_ONLY_SOCIAL: 1240 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0, 1241 p2p->num_req_dev_types, 1242 p2p->req_dev_types, dev_id, 1243 DEV_PW_DEFAULT); 1244 break; 1245 default: 1246 return -1; 1247 } 1248 1249 if (res != 0 && p2p->p2p_scan_running) { 1250 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running"); 1251 /* wait for the previous p2p_scan to complete */ 1252 res = 0; /* do not report failure */ 1253 } else if (res != 0) { 1254 p2p_dbg(p2p, "Failed to start p2p_scan"); 1255 p2p_set_state(p2p, P2P_IDLE); 1256 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1257 } 1258 1259 return res; 1260} 1261 1262 1263void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq) 1264{ 1265 p2p_dbg(p2p, "Stopping find"); 1266 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1267 p2p_clear_timeout(p2p); 1268 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND) 1269 p2p->cfg->find_stopped(p2p->cfg->cb_ctx); 1270 1271 p2p->p2ps_seek_count = 0; 1272 1273 p2p_set_state(p2p, P2P_IDLE); 1274 p2p_free_req_dev_types(p2p); 1275 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1276 if (p2p->go_neg_peer) 1277 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1278 p2p->go_neg_peer = NULL; 1279 p2p->sd_peer = NULL; 1280 p2p->invite_peer = NULL; 1281 p2p_stop_listen_for_freq(p2p, freq); 1282} 1283 1284 1285void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq) 1286{ 1287 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) { 1288 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response"); 1289 return; 1290 } 1291 if (p2p->in_listen) { 1292 p2p->in_listen = 0; 1293 p2p_clear_timeout(p2p); 1294 } 1295 if (p2p->drv_in_listen) { 1296 /* 1297 * The driver may not deliver callback to p2p_listen_end() 1298 * when the operation gets canceled, so clear the internal 1299 * variable that is tracking driver state. 1300 */ 1301 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen); 1302 p2p->drv_in_listen = 0; 1303 } 1304 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1305} 1306 1307 1308void p2p_stop_listen(struct p2p_data *p2p) 1309{ 1310 if (p2p->state != P2P_LISTEN_ONLY) { 1311 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state."); 1312 return; 1313 } 1314 1315 p2p_stop_listen_for_freq(p2p, 0); 1316 p2p_set_state(p2p, P2P_IDLE); 1317} 1318 1319 1320void p2p_stop_find(struct p2p_data *p2p) 1321{ 1322 p2p->pending_listen_freq = 0; 1323 p2p_stop_find_for_freq(p2p, 0); 1324} 1325 1326 1327static int p2p_prepare_channel_pref(struct p2p_data *p2p, 1328 unsigned int force_freq, 1329 unsigned int pref_freq, int go) 1330{ 1331 u8 op_class, op_channel; 1332 unsigned int freq = force_freq ? force_freq : pref_freq; 1333 1334 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d", 1335 force_freq, pref_freq, go); 1336 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) { 1337 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq); 1338 return -1; 1339 } 1340 1341 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) && 1342 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class, 1343 op_channel))) { 1344 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P", 1345 freq, op_class, op_channel); 1346 return -1; 1347 } 1348 1349 p2p->op_reg_class = op_class; 1350 p2p->op_channel = op_channel; 1351 1352 if (force_freq) { 1353 p2p->channels.reg_classes = 1; 1354 p2p->channels.reg_class[0].channels = 1; 1355 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 1356 p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 1357 } else { 1358 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1359 sizeof(struct p2p_channels)); 1360 } 1361 1362 return 0; 1363} 1364 1365 1366static void p2p_prepare_channel_best(struct p2p_data *p2p) 1367{ 1368 u8 op_class, op_channel; 1369 const int op_classes_5ghz[] = { 124, 115, 0 }; 1370 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 }; 1371 const int op_classes_vht[] = { 128, 0 }; 1372 1373 p2p_dbg(p2p, "Prepare channel best"); 1374 1375 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 && 1376 p2p_supported_freq(p2p, p2p->best_freq_overall) && 1377 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel) 1378 == 0) { 1379 p2p_dbg(p2p, "Select best overall channel as operating channel preference"); 1380 p2p->op_reg_class = op_class; 1381 p2p->op_channel = op_channel; 1382 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 && 1383 p2p_supported_freq(p2p, p2p->best_freq_5) && 1384 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel) 1385 == 0) { 1386 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference"); 1387 p2p->op_reg_class = op_class; 1388 p2p->op_channel = op_channel; 1389 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 && 1390 p2p_supported_freq(p2p, p2p->best_freq_24) && 1391 p2p_freq_to_channel(p2p->best_freq_24, &op_class, 1392 &op_channel) == 0) { 1393 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference"); 1394 p2p->op_reg_class = op_class; 1395 p2p->op_channel = op_channel; 1396 } else if (p2p->cfg->num_pref_chan > 0 && 1397 p2p_channels_includes(&p2p->cfg->channels, 1398 p2p->cfg->pref_chan[0].op_class, 1399 p2p->cfg->pref_chan[0].chan)) { 1400 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference"); 1401 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class; 1402 p2p->op_channel = p2p->cfg->pref_chan[0].chan; 1403 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht, 1404 &p2p->op_reg_class, &p2p->op_channel) == 1405 0) { 1406 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference", 1407 p2p->op_reg_class, p2p->op_channel); 1408 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40, 1409 &p2p->op_reg_class, &p2p->op_channel) == 1410 0) { 1411 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference", 1412 p2p->op_reg_class, p2p->op_channel); 1413 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz, 1414 &p2p->op_reg_class, &p2p->op_channel) == 1415 0) { 1416 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference", 1417 p2p->op_reg_class, p2p->op_channel); 1418 } else if (p2p_channels_includes(&p2p->cfg->channels, 1419 p2p->cfg->op_reg_class, 1420 p2p->cfg->op_channel)) { 1421 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference"); 1422 p2p->op_reg_class = p2p->cfg->op_reg_class; 1423 p2p->op_channel = p2p->cfg->op_channel; 1424 } else if (p2p_channel_random_social(&p2p->cfg->channels, 1425 &p2p->op_reg_class, 1426 &p2p->op_channel) == 0) { 1427 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference", 1428 p2p->op_reg_class, p2p->op_channel); 1429 } else { 1430 /* Select any random available channel from the first available 1431 * operating class */ 1432 p2p_channel_select(&p2p->cfg->channels, NULL, 1433 &p2p->op_reg_class, 1434 &p2p->op_channel); 1435 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference", 1436 p2p->op_channel, p2p->op_reg_class); 1437 } 1438 1439 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1440 sizeof(struct p2p_channels)); 1441} 1442 1443 1444/** 1445 * p2p_prepare_channel - Select operating channel for GO Negotiation 1446 * @p2p: P2P module context from p2p_init() 1447 * @dev: Selected peer device 1448 * @force_freq: Forced frequency in MHz or 0 if not forced 1449 * @pref_freq: Preferred frequency in MHz or 0 if no preference 1450 * @go: Whether the local end will be forced to be GO 1451 * Returns: 0 on success, -1 on failure (channel not supported for P2P) 1452 * 1453 * This function is used to do initial operating channel selection for GO 1454 * Negotiation prior to having received peer information. The selected channel 1455 * may be further optimized in p2p_reselect_channel() once the peer information 1456 * is available. 1457 */ 1458int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev, 1459 unsigned int force_freq, unsigned int pref_freq, int go) 1460{ 1461 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d", 1462 force_freq, pref_freq, go); 1463 if (force_freq || pref_freq) { 1464 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) < 1465 0) 1466 return -1; 1467 } else { 1468 p2p_prepare_channel_best(p2p); 1469 } 1470 p2p_channels_dump(p2p, "prepared channels", &p2p->channels); 1471 if (go) 1472 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq); 1473 else if (!force_freq) 1474 p2p_channels_union_inplace(&p2p->channels, 1475 &p2p->cfg->cli_channels); 1476 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels); 1477 1478 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s", 1479 p2p->op_reg_class, p2p->op_channel, 1480 force_freq ? " (forced)" : ""); 1481 1482 if (force_freq) 1483 dev->flags |= P2P_DEV_FORCE_FREQ; 1484 else 1485 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1486 1487 return 0; 1488} 1489 1490 1491static void p2p_set_dev_persistent(struct p2p_device *dev, 1492 int persistent_group) 1493{ 1494 switch (persistent_group) { 1495 case 0: 1496 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP | 1497 P2P_DEV_PREFER_PERSISTENT_RECONN); 1498 break; 1499 case 1: 1500 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP; 1501 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN; 1502 break; 1503 case 2: 1504 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP | 1505 P2P_DEV_PREFER_PERSISTENT_RECONN; 1506 break; 1507 } 1508} 1509 1510 1511int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr, 1512 enum p2p_wps_method wps_method, 1513 int go_intent, const u8 *own_interface_addr, 1514 unsigned int force_freq, int persistent_group, 1515 const u8 *force_ssid, size_t force_ssid_len, 1516 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id) 1517{ 1518 struct p2p_device *dev; 1519 1520 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR 1521 " GO Intent=%d Intended Interface Address=" MACSTR 1522 " wps_method=%d persistent_group=%d pd_before_go_neg=%d " 1523 "oob_pw_id=%u", 1524 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1525 wps_method, persistent_group, pd_before_go_neg, oob_pw_id); 1526 1527 dev = p2p_get_device(p2p, peer_addr); 1528 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 1529 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR, 1530 MAC2STR(peer_addr)); 1531 return -1; 1532 } 1533 1534 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, 1535 go_intent == 15) < 0) 1536 return -1; 1537 1538 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 1539 if (!(dev->info.dev_capab & 1540 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 1541 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1542 " that is in a group and is not discoverable", 1543 MAC2STR(peer_addr)); 1544 return -1; 1545 } 1546 if (dev->oper_freq <= 0) { 1547 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1548 " with incomplete information", 1549 MAC2STR(peer_addr)); 1550 return -1; 1551 } 1552 1553 /* 1554 * First, try to connect directly. If the peer does not 1555 * acknowledge frames, assume it is sleeping and use device 1556 * discoverability via the GO at that point. 1557 */ 1558 } 1559 1560 p2p->ssid_set = 0; 1561 if (force_ssid) { 1562 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1563 force_ssid, force_ssid_len); 1564 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1565 p2p->ssid_len = force_ssid_len; 1566 p2p->ssid_set = 1; 1567 } 1568 1569 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1570 dev->flags &= ~P2P_DEV_USER_REJECTED; 1571 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 1572 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1573 if (pd_before_go_neg) 1574 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG; 1575 else { 1576 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG; 1577 /* 1578 * Assign dialog token and tie breaker here to use the same 1579 * values in each retry within the same GO Negotiation exchange. 1580 */ 1581 dev->dialog_token++; 1582 if (dev->dialog_token == 0) 1583 dev->dialog_token = 1; 1584 dev->tie_breaker = p2p->next_tie_breaker; 1585 p2p->next_tie_breaker = !p2p->next_tie_breaker; 1586 } 1587 dev->connect_reqs = 0; 1588 dev->go_neg_req_sent = 0; 1589 dev->go_state = UNKNOWN_GO; 1590 p2p_set_dev_persistent(dev, persistent_group); 1591 p2p->go_intent = go_intent; 1592 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1593 1594 if (p2p->state != P2P_IDLE) 1595 p2p_stop_find(p2p); 1596 1597 if (p2p->after_scan_tx) { 1598 /* 1599 * We need to drop the pending frame to avoid issues with the 1600 * new GO Negotiation, e.g., when the pending frame was from a 1601 * previous attempt at starting a GO Negotiation. 1602 */ 1603 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion"); 1604 os_free(p2p->after_scan_tx); 1605 p2p->after_scan_tx = NULL; 1606 } 1607 1608 dev->wps_method = wps_method; 1609 dev->oob_pw_id = oob_pw_id; 1610 dev->status = P2P_SC_SUCCESS; 1611 1612 if (p2p->p2p_scan_running) { 1613 p2p_dbg(p2p, "p2p_scan running - delay connect send"); 1614 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT; 1615 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN); 1616 return 0; 1617 } 1618 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1619 1620 return p2p_connect_send(p2p, dev); 1621} 1622 1623 1624int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr, 1625 enum p2p_wps_method wps_method, 1626 int go_intent, const u8 *own_interface_addr, 1627 unsigned int force_freq, int persistent_group, 1628 const u8 *force_ssid, size_t force_ssid_len, 1629 unsigned int pref_freq, u16 oob_pw_id) 1630{ 1631 struct p2p_device *dev; 1632 1633 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR 1634 " GO Intent=%d Intended Interface Address=" MACSTR 1635 " wps_method=%d persistent_group=%d oob_pw_id=%u", 1636 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1637 wps_method, persistent_group, oob_pw_id); 1638 1639 dev = p2p_get_device(p2p, peer_addr); 1640 if (dev == NULL) { 1641 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR, 1642 MAC2STR(peer_addr)); 1643 return -1; 1644 } 1645 1646 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent == 1647 15) < 0) 1648 return -1; 1649 1650 p2p->ssid_set = 0; 1651 if (force_ssid) { 1652 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1653 force_ssid, force_ssid_len); 1654 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1655 p2p->ssid_len = force_ssid_len; 1656 p2p->ssid_set = 1; 1657 } 1658 1659 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1660 dev->flags &= ~P2P_DEV_USER_REJECTED; 1661 dev->go_neg_req_sent = 0; 1662 dev->go_state = UNKNOWN_GO; 1663 p2p_set_dev_persistent(dev, persistent_group); 1664 p2p->go_intent = go_intent; 1665 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1666 1667 dev->wps_method = wps_method; 1668 dev->oob_pw_id = oob_pw_id; 1669 dev->status = P2P_SC_SUCCESS; 1670 1671 return 0; 1672} 1673 1674 1675void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr, 1676 struct p2p_device *dev, struct p2p_message *msg) 1677{ 1678 os_get_reltime(&dev->last_seen); 1679 1680 p2p_copy_wps_info(p2p, dev, 0, msg); 1681 1682 if (msg->listen_channel) { 1683 int freq; 1684 freq = p2p_channel_to_freq(msg->listen_channel[3], 1685 msg->listen_channel[4]); 1686 if (freq < 0) { 1687 p2p_dbg(p2p, "Unknown peer Listen channel: " 1688 "country=%c%c(0x%02x) reg_class=%u channel=%u", 1689 msg->listen_channel[0], 1690 msg->listen_channel[1], 1691 msg->listen_channel[2], 1692 msg->listen_channel[3], 1693 msg->listen_channel[4]); 1694 } else { 1695 p2p_dbg(p2p, "Update peer " MACSTR 1696 " Listen channel: %u -> %u MHz", 1697 MAC2STR(dev->info.p2p_device_addr), 1698 dev->listen_freq, freq); 1699 dev->listen_freq = freq; 1700 } 1701 } 1702 1703 if (msg->wfd_subelems) { 1704 wpabuf_free(dev->info.wfd_subelems); 1705 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems); 1706 } 1707 1708 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 1709 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 1710 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request"); 1711 } else { 1712 p2p_dbg(p2p, "Created device entry based on GO Neg Req: " 1713 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' " 1714 "listen_freq=%d", 1715 MAC2STR(dev->info.p2p_device_addr), 1716 dev->info.dev_capab, dev->info.group_capab, 1717 dev->info.device_name, dev->listen_freq); 1718 } 1719 1720 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY; 1721 1722 if (dev->flags & P2P_DEV_USER_REJECTED) { 1723 p2p_dbg(p2p, "Do not report rejected device"); 1724 return; 1725 } 1726 1727 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 1728 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 1729 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 1730} 1731 1732 1733void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len) 1734{ 1735 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 1736 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2); 1737 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2], 1738 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len); 1739 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len; 1740} 1741 1742 1743int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params) 1744{ 1745 if (p2p->ssid_set) { 1746 os_memcpy(params->ssid, p2p->ssid, p2p->ssid_len); 1747 params->ssid_len = p2p->ssid_len; 1748 } else { 1749 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len); 1750 } 1751 p2p->ssid_set = 0; 1752 1753 p2p_random(params->passphrase, p2p->cfg->passphrase_len); 1754 return 0; 1755} 1756 1757 1758void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer) 1759{ 1760 struct p2p_go_neg_results res; 1761 int go = peer->go_state == LOCAL_GO; 1762 struct p2p_channels intersection; 1763 1764 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)", 1765 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer"); 1766 1767 os_memset(&res, 0, sizeof(res)); 1768 res.role_go = go; 1769 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 1770 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 1771 res.wps_method = peer->wps_method; 1772 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 1773 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 1774 res.persistent_group = 2; 1775 else 1776 res.persistent_group = 1; 1777 } 1778 1779 if (go) { 1780 /* Setup AP mode for WPS provisioning */ 1781 res.freq = p2p_channel_to_freq(p2p->op_reg_class, 1782 p2p->op_channel); 1783 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1784 res.ssid_len = p2p->ssid_len; 1785 p2p_random(res.passphrase, p2p->cfg->passphrase_len); 1786 } else { 1787 res.freq = peer->oper_freq; 1788 if (p2p->ssid_len) { 1789 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1790 res.ssid_len = p2p->ssid_len; 1791 } 1792 } 1793 1794 p2p_channels_dump(p2p, "own channels", &p2p->channels); 1795 p2p_channels_dump(p2p, "peer channels", &peer->channels); 1796 p2p_channels_intersect(&p2p->channels, &peer->channels, 1797 &intersection); 1798 if (go) { 1799 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq); 1800 p2p_channels_dump(p2p, "intersection after no-GO removal", 1801 &intersection); 1802 } 1803 1804 p2p_channels_to_freqs(&intersection, res.freq_list, 1805 P2P_MAX_CHANNELS); 1806 1807 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout; 1808 1809 p2p_clear_timeout(p2p); 1810 p2p->ssid_set = 0; 1811 peer->go_neg_req_sent = 0; 1812 peer->wps_method = WPS_NOT_READY; 1813 peer->oob_pw_id = 0; 1814 wpabuf_free(peer->go_neg_conf); 1815 peer->go_neg_conf = NULL; 1816 1817 p2p_set_state(p2p, P2P_PROVISIONING); 1818 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 1819} 1820 1821 1822static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa, 1823 const u8 *data, size_t len, int rx_freq) 1824{ 1825 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa)); 1826 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len); 1827 1828 if (len < 1) 1829 return; 1830 1831 switch (data[0]) { 1832 case P2P_GO_NEG_REQ: 1833 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq); 1834 break; 1835 case P2P_GO_NEG_RESP: 1836 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq); 1837 break; 1838 case P2P_GO_NEG_CONF: 1839 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1); 1840 break; 1841 case P2P_INVITATION_REQ: 1842 p2p_process_invitation_req(p2p, sa, data + 1, len - 1, 1843 rx_freq); 1844 break; 1845 case P2P_INVITATION_RESP: 1846 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1); 1847 break; 1848 case P2P_PROV_DISC_REQ: 1849 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1850 break; 1851 case P2P_PROV_DISC_RESP: 1852 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1); 1853 break; 1854 case P2P_DEV_DISC_REQ: 1855 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1856 break; 1857 case P2P_DEV_DISC_RESP: 1858 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1); 1859 break; 1860 default: 1861 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d", 1862 data[0]); 1863 break; 1864 } 1865} 1866 1867 1868static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, 1869 const u8 *sa, const u8 *bssid, const u8 *data, 1870 size_t len, int freq) 1871{ 1872 if (len < 1) 1873 return; 1874 1875 switch (data[0]) { 1876 case WLAN_PA_VENDOR_SPECIFIC: 1877 data++; 1878 len--; 1879 if (len < 4) 1880 return; 1881 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1882 return; 1883 1884 data += 4; 1885 len -= 4; 1886 1887 p2p_rx_p2p_action(p2p, sa, data, len, freq); 1888 break; 1889 case WLAN_PA_GAS_INITIAL_REQ: 1890 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq); 1891 break; 1892 case WLAN_PA_GAS_INITIAL_RESP: 1893 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq); 1894 break; 1895 case WLAN_PA_GAS_COMEBACK_REQ: 1896 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq); 1897 break; 1898 case WLAN_PA_GAS_COMEBACK_RESP: 1899 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq); 1900 break; 1901 } 1902} 1903 1904 1905void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa, 1906 const u8 *bssid, u8 category, 1907 const u8 *data, size_t len, int freq) 1908{ 1909 if (category == WLAN_ACTION_PUBLIC) { 1910 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq); 1911 return; 1912 } 1913 1914 if (category != WLAN_ACTION_VENDOR_SPECIFIC) 1915 return; 1916 1917 if (len < 4) 1918 return; 1919 1920 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1921 return; 1922 data += 4; 1923 len -= 4; 1924 1925 /* P2P action frame */ 1926 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa)); 1927 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len); 1928 1929 if (len < 1) 1930 return; 1931 switch (data[0]) { 1932 case P2P_NOA: 1933 p2p_dbg(p2p, "Received P2P Action - Notice of Absence"); 1934 /* TODO */ 1935 break; 1936 case P2P_PRESENCE_REQ: 1937 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq); 1938 break; 1939 case P2P_PRESENCE_RESP: 1940 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1); 1941 break; 1942 case P2P_GO_DISC_REQ: 1943 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq); 1944 break; 1945 default: 1946 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]); 1947 break; 1948 } 1949} 1950 1951 1952static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx) 1953{ 1954 struct p2p_data *p2p = eloop_ctx; 1955 if (p2p->go_neg_peer == NULL) 1956 return; 1957 if (p2p->pending_listen_freq) { 1958 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start"); 1959 p2p->pending_listen_freq = 0; 1960 } 1961 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1962 p2p->go_neg_peer->status = P2P_SC_SUCCESS; 1963 /* 1964 * Set new timeout to make sure a previously set one does not expire 1965 * too quickly while waiting for the GO Negotiation to complete. 1966 */ 1967 p2p_set_timeout(p2p, 0, 500000); 1968 p2p_connect_send(p2p, p2p->go_neg_peer); 1969} 1970 1971 1972static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx) 1973{ 1974 struct p2p_data *p2p = eloop_ctx; 1975 if (p2p->invite_peer == NULL) 1976 return; 1977 if (p2p->pending_listen_freq) { 1978 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start"); 1979 p2p->pending_listen_freq = 0; 1980 } 1981 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1982 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr, 1983 p2p->invite_dev_pw_id); 1984} 1985 1986 1987static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr, 1988 const u8 *ie, size_t ie_len) 1989{ 1990 struct p2p_message msg; 1991 struct p2p_device *dev; 1992 1993 os_memset(&msg, 0, sizeof(msg)); 1994 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL) 1995 { 1996 p2p_parse_free(&msg); 1997 return; /* not a P2P probe */ 1998 } 1999 2000 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 2001 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 2002 != 0) { 2003 /* The Probe Request is not part of P2P Device Discovery. It is 2004 * not known whether the source address of the frame is the P2P 2005 * Device Address or P2P Interface Address. Do not add a new 2006 * peer entry based on this frames. 2007 */ 2008 p2p_parse_free(&msg); 2009 return; 2010 } 2011 2012 dev = p2p_get_device(p2p, addr); 2013 if (dev) { 2014 if (dev->country[0] == 0 && msg.listen_channel) 2015 os_memcpy(dev->country, msg.listen_channel, 3); 2016 os_get_reltime(&dev->last_seen); 2017 p2p_parse_free(&msg); 2018 return; /* already known */ 2019 } 2020 2021 dev = p2p_create_device(p2p, addr); 2022 if (dev == NULL) { 2023 p2p_parse_free(&msg); 2024 return; 2025 } 2026 2027 os_get_reltime(&dev->last_seen); 2028 dev->flags |= P2P_DEV_PROBE_REQ_ONLY; 2029 2030 if (msg.listen_channel) { 2031 os_memcpy(dev->country, msg.listen_channel, 3); 2032 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3], 2033 msg.listen_channel[4]); 2034 } 2035 2036 p2p_copy_wps_info(p2p, dev, 1, &msg); 2037 2038 if (msg.wfd_subelems) { 2039 wpabuf_free(dev->info.wfd_subelems); 2040 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 2041 } 2042 2043 p2p_parse_free(&msg); 2044 2045 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR 2046 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d", 2047 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab, 2048 dev->info.group_capab, dev->info.device_name, 2049 dev->listen_freq); 2050} 2051 2052 2053struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p, 2054 const u8 *addr, 2055 struct p2p_message *msg) 2056{ 2057 struct p2p_device *dev; 2058 2059 dev = p2p_get_device(p2p, addr); 2060 if (dev) { 2061 os_get_reltime(&dev->last_seen); 2062 return dev; /* already known */ 2063 } 2064 2065 dev = p2p_create_device(p2p, addr); 2066 if (dev == NULL) 2067 return NULL; 2068 2069 p2p_add_dev_info(p2p, addr, dev, msg); 2070 2071 return dev; 2072} 2073 2074 2075static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type) 2076{ 2077 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0) 2078 return 1; 2079 if (os_memcmp(dev_type, req_dev_type, 2) == 0 && 2080 WPA_GET_BE32(&req_dev_type[2]) == 0 && 2081 WPA_GET_BE16(&req_dev_type[6]) == 0) 2082 return 1; /* Category match with wildcard OUI/sub-category */ 2083 return 0; 2084} 2085 2086 2087int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[], 2088 size_t num_req_dev_type) 2089{ 2090 size_t i; 2091 for (i = 0; i < num_req_dev_type; i++) { 2092 if (dev_type_match(dev_type, req_dev_type[i])) 2093 return 1; 2094 } 2095 return 0; 2096} 2097 2098 2099/** 2100 * p2p_match_dev_type - Match local device type with requested type 2101 * @p2p: P2P module context from p2p_init() 2102 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) 2103 * Returns: 1 on match, 0 on mismatch 2104 * 2105 * This function can be used to match the Requested Device Type attribute in 2106 * WPS IE with the local device types for deciding whether to reply to a Probe 2107 * Request frame. 2108 */ 2109int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps) 2110{ 2111 struct wps_parse_attr attr; 2112 size_t i; 2113 2114 if (wps_parse_msg(wps, &attr)) 2115 return 1; /* assume no Requested Device Type attributes */ 2116 2117 if (attr.num_req_dev_type == 0) 2118 return 1; /* no Requested Device Type attributes -> match */ 2119 2120 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type, 2121 attr.num_req_dev_type)) 2122 return 1; /* Own Primary Device Type matches */ 2123 2124 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) { 2125 if (dev_type_list_match(p2p->cfg->sec_dev_type[i], 2126 attr.req_dev_type, 2127 attr.num_req_dev_type)) 2128 return 1; /* Own Secondary Device Type matches */ 2129 } 2130 2131 /* No matching device type found */ 2132 return 0; 2133} 2134 2135 2136struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p) 2137{ 2138 struct wpabuf *buf; 2139 u8 *len; 2140 int pw_id = -1; 2141 size_t extra = 0; 2142 2143#ifdef CONFIG_WIFI_DISPLAY 2144 if (p2p->wfd_ie_probe_resp) 2145 extra = wpabuf_len(p2p->wfd_ie_probe_resp); 2146#endif /* CONFIG_WIFI_DISPLAY */ 2147 2148 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]) 2149 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]); 2150 2151 if (p2p->query_count) 2152 extra += MAX_SVC_ADV_IE_LEN; 2153 2154 buf = wpabuf_alloc(1000 + extra); 2155 if (buf == NULL) 2156 return NULL; 2157 2158 if (p2p->go_neg_peer) { 2159 /* Advertise immediate availability of WPS credential */ 2160 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method); 2161 } 2162 2163 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) { 2164 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response"); 2165 wpabuf_free(buf); 2166 return NULL; 2167 } 2168 2169#ifdef CONFIG_WIFI_DISPLAY 2170 if (p2p->wfd_ie_probe_resp) 2171 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp); 2172#endif /* CONFIG_WIFI_DISPLAY */ 2173 2174 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]) 2175 wpabuf_put_buf(buf, 2176 p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]); 2177 2178 /* P2P IE */ 2179 len = p2p_buf_add_ie_hdr(buf); 2180 p2p_buf_add_capability(buf, p2p->dev_capab & 2181 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2182 if (p2p->ext_listen_interval) 2183 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 2184 p2p->ext_listen_interval); 2185 p2p_buf_add_device_info(buf, p2p, NULL); 2186 p2p_buf_update_ie_hdr(buf, len); 2187 2188 if (p2p->query_count) { 2189 p2p_buf_add_service_instance(buf, p2p, p2p->query_count, 2190 p2p->query_hash, 2191 p2p->p2ps_adv_list); 2192 } 2193 2194 return buf; 2195} 2196 2197 2198static int p2p_service_find_asp(struct p2p_data *p2p, const u8 *hash) 2199{ 2200 struct p2ps_advertisement *adv_data; 2201 2202 p2p_dbg(p2p, "ASP find - ASP list: %p", p2p->p2ps_adv_list); 2203 2204 /* Wildcard always matches if we have actual services */ 2205 if (os_memcmp(hash, p2p->wild_card_hash, P2PS_HASH_LEN) == 0) 2206 return p2p->p2ps_adv_list != NULL; 2207 2208 adv_data = p2p->p2ps_adv_list; 2209 while (adv_data) { 2210 p2p_dbg(p2p, "ASP hash: %x =? %x", hash[0], adv_data->hash[0]); 2211 if (os_memcmp(hash, adv_data->hash, P2PS_HASH_LEN) == 0) 2212 return 1; 2213 adv_data = adv_data->next; 2214 } 2215 2216 return 0; 2217} 2218 2219 2220static enum p2p_probe_req_status 2221p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2222 const u8 *bssid, const u8 *ie, size_t ie_len) 2223{ 2224 struct ieee802_11_elems elems; 2225 struct wpabuf *buf; 2226 struct ieee80211_mgmt *resp; 2227 struct p2p_message msg; 2228 struct wpabuf *ies; 2229 2230 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) == 2231 ParseFailed) { 2232 /* Ignore invalid Probe Request frames */ 2233 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it"); 2234 return P2P_PREQ_MALFORMED; 2235 } 2236 2237 if (elems.p2p == NULL) { 2238 /* not a P2P probe - ignore it */ 2239 p2p_dbg(p2p, "Not a P2P probe - ignore it"); 2240 return P2P_PREQ_NOT_P2P; 2241 } 2242 2243 if (dst && !is_broadcast_ether_addr(dst) && 2244 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2245 /* Not sent to the broadcast address or our P2P Device Address 2246 */ 2247 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it", 2248 MAC2STR(dst)); 2249 return P2P_PREQ_NOT_PROCESSED; 2250 } 2251 2252 if (bssid && !is_broadcast_ether_addr(bssid)) { 2253 /* Not sent to the Wildcard BSSID */ 2254 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it", 2255 MAC2STR(bssid)); 2256 return P2P_PREQ_NOT_PROCESSED; 2257 } 2258 2259 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN || 2260 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) != 2261 0) { 2262 /* not using P2P Wildcard SSID - ignore */ 2263 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it"); 2264 return P2P_PREQ_NOT_PROCESSED; 2265 } 2266 2267 if (supp_rates_11b_only(&elems)) { 2268 /* Indicates support for 11b rates only */ 2269 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it"); 2270 return P2P_PREQ_NOT_P2P; 2271 } 2272 2273 os_memset(&msg, 0, sizeof(msg)); 2274 if (p2p_parse_ies(ie, ie_len, &msg) < 0) { 2275 /* Could not parse P2P attributes */ 2276 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it"); 2277 return P2P_PREQ_NOT_P2P; 2278 } 2279 2280 p2p->p2ps_svc_found = 0; 2281 2282 if (msg.service_hash && msg.service_hash_count) { 2283 const u8 *hash = msg.service_hash; 2284 u8 *dest = p2p->query_hash; 2285 u8 i; 2286 2287 p2p->query_count = 0; 2288 for (i = 0; i < msg.service_hash_count; i++) { 2289 if (p2p_service_find_asp(p2p, hash)) { 2290 p2p->p2ps_svc_found = 1; 2291 2292 if (!os_memcmp(hash, p2p->wild_card_hash, 2293 P2PS_HASH_LEN)) { 2294 /* We found match(es) but wildcard 2295 * will return all */ 2296 p2p->query_count = 1; 2297 os_memcpy(p2p->query_hash, hash, 2298 P2PS_HASH_LEN); 2299 break; 2300 } 2301 2302 /* Save each matching hash */ 2303 if (p2p->query_count < P2P_MAX_QUERY_HASH) { 2304 os_memcpy(dest, hash, P2PS_HASH_LEN); 2305 dest += P2PS_HASH_LEN; 2306 p2p->query_count++; 2307 } else { 2308 /* We found match(es) but too many to 2309 * return all */ 2310 p2p->query_count = 0; 2311 break; 2312 } 2313 } 2314 hash += P2PS_HASH_LEN; 2315 } 2316 2317 p2p_dbg(p2p, "ASP adv found: %d", p2p->p2ps_svc_found); 2318 2319 /* Probed hash unknown */ 2320 if (!p2p->p2ps_svc_found) { 2321 p2p_parse_free(&msg); 2322 return P2P_PREQ_NOT_PROCESSED; 2323 } 2324 } else { 2325 /* This is not a P2PS Probe Request */ 2326 p2p->query_count = 0; 2327 p2p_dbg(p2p, "No P2PS Hash in Probe Request"); 2328 2329 if (!p2p->in_listen || !p2p->drv_in_listen) { 2330 /* not in Listen state - ignore Probe Request */ 2331 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request", 2332 p2p->in_listen, p2p->drv_in_listen); 2333 p2p_parse_free(&msg); 2334 return P2P_PREQ_NOT_LISTEN; 2335 } 2336 } 2337 2338 if (msg.device_id && 2339 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2340 /* Device ID did not match */ 2341 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it", 2342 MAC2STR(msg.device_id)); 2343 p2p_parse_free(&msg); 2344 return P2P_PREQ_NOT_PROCESSED; 2345 } 2346 2347 /* Check Requested Device Type match */ 2348 if (msg.wps_attributes && 2349 !p2p_match_dev_type(p2p, msg.wps_attributes)) { 2350 /* No match with Requested Device Type */ 2351 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it"); 2352 p2p_parse_free(&msg); 2353 return P2P_PREQ_NOT_PROCESSED; 2354 } 2355 p2p_parse_free(&msg); 2356 2357 if (!p2p->cfg->send_probe_resp) { 2358 /* Response generated elsewhere */ 2359 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response"); 2360 return P2P_PREQ_NOT_PROCESSED; 2361 } 2362 2363 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state"); 2364 2365 /* 2366 * We do not really have a specific BSS that this frame is advertising, 2367 * so build a frame that has some information in valid format. This is 2368 * really only used for discovery purposes, not to learn exact BSS 2369 * parameters. 2370 */ 2371 ies = p2p_build_probe_resp_ies(p2p); 2372 if (ies == NULL) 2373 return P2P_PREQ_NOT_PROCESSED; 2374 2375 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 2376 if (buf == NULL) { 2377 wpabuf_free(ies); 2378 return P2P_PREQ_NOT_PROCESSED; 2379 } 2380 2381 resp = NULL; 2382 resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp); 2383 2384 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 2385 (WLAN_FC_STYPE_PROBE_RESP << 4)); 2386 os_memcpy(resp->da, addr, ETH_ALEN); 2387 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN); 2388 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN); 2389 resp->u.probe_resp.beacon_int = host_to_le16(100); 2390 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 2391 resp->u.probe_resp.capab_info = 2392 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE | 2393 WLAN_CAPABILITY_PRIVACY | 2394 WLAN_CAPABILITY_SHORT_SLOT_TIME); 2395 2396 wpabuf_put_u8(buf, WLAN_EID_SSID); 2397 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN); 2398 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 2399 2400 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES); 2401 wpabuf_put_u8(buf, 8); 2402 wpabuf_put_u8(buf, (60 / 5) | 0x80); 2403 wpabuf_put_u8(buf, 90 / 5); 2404 wpabuf_put_u8(buf, (120 / 5) | 0x80); 2405 wpabuf_put_u8(buf, 180 / 5); 2406 wpabuf_put_u8(buf, (240 / 5) | 0x80); 2407 wpabuf_put_u8(buf, 360 / 5); 2408 wpabuf_put_u8(buf, 480 / 5); 2409 wpabuf_put_u8(buf, 540 / 5); 2410 2411 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS); 2412 wpabuf_put_u8(buf, 1); 2413 wpabuf_put_u8(buf, p2p->cfg->channel); 2414 2415 wpabuf_put_buf(buf, ies); 2416 wpabuf_free(ies); 2417 2418 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf); 2419 2420 wpabuf_free(buf); 2421 2422 return P2P_PREQ_NOT_PROCESSED; 2423} 2424 2425 2426enum p2p_probe_req_status 2427p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2428 const u8 *bssid, const u8 *ie, size_t ie_len) 2429{ 2430 enum p2p_probe_req_status res; 2431 2432 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len); 2433 2434 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len); 2435 p2p->query_count = 0; 2436 2437 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) && 2438 p2p->go_neg_peer && 2439 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN) 2440 == 0 && 2441 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 2442 /* Received a Probe Request from GO Negotiation peer */ 2443 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout"); 2444 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2445 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL); 2446 return P2P_PREQ_PROCESSED; 2447 } 2448 2449 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) && 2450 p2p->invite_peer && 2451 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) && 2452 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN) 2453 == 0) { 2454 /* Received a Probe Request from Invite peer */ 2455 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout"); 2456 eloop_cancel_timeout(p2p_invite_start, p2p, NULL); 2457 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL); 2458 return P2P_PREQ_PROCESSED; 2459 } 2460 2461 return res; 2462} 2463 2464 2465static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid, 2466 u8 *buf, size_t len, struct wpabuf *p2p_ie) 2467{ 2468 struct wpabuf *tmp; 2469 u8 *lpos; 2470 size_t tmplen; 2471 int res; 2472 u8 group_capab; 2473 2474 if (p2p_ie == NULL) 2475 return 0; /* WLAN AP is not a P2P manager */ 2476 2477 /* 2478 * (Re)Association Request - P2P IE 2479 * P2P Capability attribute (shall be present) 2480 * P2P Interface attribute (present if concurrent device and 2481 * P2P Management is enabled) 2482 */ 2483 tmp = wpabuf_alloc(200); 2484 if (tmp == NULL) 2485 return -1; 2486 2487 lpos = p2p_buf_add_ie_hdr(tmp); 2488 group_capab = 0; 2489 if (p2p->num_groups > 0) { 2490 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; 2491 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2492 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) && 2493 p2p->cross_connect) 2494 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 2495 } 2496 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab); 2497 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2498 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED)) 2499 p2p_buf_add_p2p_interface(tmp, p2p); 2500 p2p_buf_update_ie_hdr(tmp, lpos); 2501 2502 tmplen = wpabuf_len(tmp); 2503 if (tmplen > len) 2504 res = -1; 2505 else { 2506 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2507 res = tmplen; 2508 } 2509 wpabuf_free(tmp); 2510 2511 return res; 2512} 2513 2514 2515int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf, 2516 size_t len, int p2p_group, struct wpabuf *p2p_ie) 2517{ 2518 struct wpabuf *tmp; 2519 u8 *lpos; 2520 struct p2p_device *peer; 2521 size_t tmplen; 2522 int res; 2523 size_t extra = 0; 2524 2525 if (!p2p_group) 2526 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie); 2527 2528#ifdef CONFIG_WIFI_DISPLAY 2529 if (p2p->wfd_ie_assoc_req) 2530 extra = wpabuf_len(p2p->wfd_ie_assoc_req); 2531#endif /* CONFIG_WIFI_DISPLAY */ 2532 2533 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]) 2534 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]); 2535 2536 /* 2537 * (Re)Association Request - P2P IE 2538 * P2P Capability attribute (shall be present) 2539 * Extended Listen Timing (may be present) 2540 * P2P Device Info attribute (shall be present) 2541 */ 2542 tmp = wpabuf_alloc(200 + extra); 2543 if (tmp == NULL) 2544 return -1; 2545 2546#ifdef CONFIG_WIFI_DISPLAY 2547 if (p2p->wfd_ie_assoc_req) 2548 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req); 2549#endif /* CONFIG_WIFI_DISPLAY */ 2550 2551 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]) 2552 wpabuf_put_buf(tmp, 2553 p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]); 2554 2555 peer = bssid ? p2p_get_device(p2p, bssid) : NULL; 2556 2557 lpos = p2p_buf_add_ie_hdr(tmp); 2558 p2p_buf_add_capability(tmp, p2p->dev_capab, 0); 2559 if (p2p->ext_listen_interval) 2560 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period, 2561 p2p->ext_listen_interval); 2562 p2p_buf_add_device_info(tmp, p2p, peer); 2563 p2p_buf_update_ie_hdr(tmp, lpos); 2564 2565 tmplen = wpabuf_len(tmp); 2566 if (tmplen > len) 2567 res = -1; 2568 else { 2569 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2570 res = tmplen; 2571 } 2572 wpabuf_free(tmp); 2573 2574 return res; 2575} 2576 2577 2578int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) 2579{ 2580 struct wpabuf *p2p_ie; 2581 int ret; 2582 2583 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); 2584 if (p2p_ie == NULL) 2585 return 0; 2586 2587 ret = p2p_attr_text(p2p_ie, buf, end); 2588 wpabuf_free(p2p_ie); 2589 return ret; 2590} 2591 2592 2593struct p2ps_advertisement * 2594p2p_service_p2ps_id(struct p2p_data *p2p, u32 adv_id) 2595{ 2596 struct p2ps_advertisement *adv_data; 2597 2598 if (!p2p) 2599 return NULL; 2600 2601 adv_data = p2p->p2ps_adv_list; 2602 while (adv_data) { 2603 if (adv_data->id == adv_id) 2604 return adv_data; 2605 adv_data = adv_data->next; 2606 } 2607 2608 return NULL; 2609} 2610 2611 2612int p2p_service_del_asp(struct p2p_data *p2p, u32 adv_id) 2613{ 2614 struct p2ps_advertisement *adv_data; 2615 struct p2ps_advertisement **prior; 2616 2617 if (!p2p) 2618 return -1; 2619 2620 adv_data = p2p->p2ps_adv_list; 2621 prior = &p2p->p2ps_adv_list; 2622 while (adv_data) { 2623 if (adv_data->id == adv_id) { 2624 p2p_dbg(p2p, "Delete ASP adv_id=0x%x", adv_id); 2625 *prior = adv_data->next; 2626 os_free(adv_data); 2627 return 0; 2628 } 2629 prior = &adv_data->next; 2630 adv_data = adv_data->next; 2631 } 2632 2633 return -1; 2634} 2635 2636 2637int p2p_service_add_asp(struct p2p_data *p2p, int auto_accept, u32 adv_id, 2638 const char *adv_str, u8 svc_state, u16 config_methods, 2639 const char *svc_info) 2640{ 2641 struct p2ps_advertisement *adv_data, *tmp, **prev; 2642 u8 buf[P2PS_HASH_LEN]; 2643 size_t adv_data_len, adv_len, info_len = 0; 2644 2645 if (!p2p || !adv_str || !adv_str[0]) 2646 return -1; 2647 2648 if (!(config_methods & p2p->cfg->config_methods)) { 2649 p2p_dbg(p2p, "Config methods not supported svc: 0x%x dev: 0x%x", 2650 config_methods, p2p->cfg->config_methods); 2651 return -1; 2652 } 2653 2654 if (!p2ps_gen_hash(p2p, adv_str, buf)) 2655 return -1; 2656 2657 if (svc_info) 2658 info_len = os_strlen(svc_info); 2659 adv_len = os_strlen(adv_str); 2660 adv_data_len = sizeof(struct p2ps_advertisement) + adv_len + 1 + 2661 info_len + 1; 2662 2663 adv_data = os_zalloc(adv_data_len); 2664 if (!adv_data) 2665 return -1; 2666 2667 os_memcpy(adv_data->hash, buf, P2PS_HASH_LEN); 2668 adv_data->id = adv_id; 2669 adv_data->state = svc_state; 2670 adv_data->config_methods = config_methods & p2p->cfg->config_methods; 2671 adv_data->auto_accept = (u8) auto_accept; 2672 os_memcpy(adv_data->svc_name, adv_str, adv_len); 2673 2674 if (svc_info && info_len) { 2675 adv_data->svc_info = &adv_data->svc_name[adv_len + 1]; 2676 os_memcpy(adv_data->svc_info, svc_info, info_len); 2677 } 2678 2679 /* 2680 * Group Advertisements by service string. They do not need to be 2681 * sorted, but groups allow easier Probe Response instance grouping 2682 */ 2683 tmp = p2p->p2ps_adv_list; 2684 prev = &p2p->p2ps_adv_list; 2685 while (tmp) { 2686 if (tmp->id == adv_data->id) { 2687 if (os_strcmp(tmp->svc_name, adv_data->svc_name) != 0) { 2688 os_free(adv_data); 2689 return -1; 2690 } 2691 adv_data->next = tmp->next; 2692 *prev = adv_data; 2693 os_free(tmp); 2694 goto inserted; 2695 } else { 2696 if (os_strcmp(tmp->svc_name, adv_data->svc_name) == 0) { 2697 adv_data->next = tmp->next; 2698 tmp->next = adv_data; 2699 goto inserted; 2700 } 2701 } 2702 prev = &tmp->next; 2703 tmp = tmp->next; 2704 } 2705 2706 /* No svc_name match found */ 2707 adv_data->next = p2p->p2ps_adv_list; 2708 p2p->p2ps_adv_list = adv_data; 2709 2710inserted: 2711 p2p_dbg(p2p, 2712 "Added ASP advertisement adv_id=0x%x config_methods=0x%x svc_state=0x%x adv_str='%s'", 2713 adv_id, adv_data->config_methods, svc_state, adv_str); 2714 2715 return 0; 2716} 2717 2718 2719int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr) 2720{ 2721 struct p2p_message msg; 2722 2723 os_memset(&msg, 0, sizeof(msg)); 2724 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 2725 return -1; 2726 2727 if (msg.p2p_device_addr) { 2728 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); 2729 return 0; 2730 } else if (msg.device_id) { 2731 os_memcpy(dev_addr, msg.device_id, ETH_ALEN); 2732 return 0; 2733 } 2734 return -1; 2735} 2736 2737 2738int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr) 2739{ 2740 struct wpabuf *p2p_ie; 2741 int ret; 2742 2743 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 2744 P2P_IE_VENDOR_TYPE); 2745 if (p2p_ie == NULL) 2746 return -1; 2747 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr); 2748 wpabuf_free(p2p_ie); 2749 return ret; 2750} 2751 2752 2753static void p2p_clear_go_neg(struct p2p_data *p2p) 2754{ 2755 p2p->go_neg_peer = NULL; 2756 p2p_clear_timeout(p2p); 2757 p2p_set_state(p2p, P2P_IDLE); 2758} 2759 2760 2761void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr) 2762{ 2763 if (p2p->go_neg_peer == NULL) { 2764 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification"); 2765 return; /* No pending Group Formation */ 2766 } 2767 2768 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) != 2769 0) { 2770 p2p_dbg(p2p, "Ignore WPS registration success notification for " 2771 MACSTR " (GO Negotiation peer " MACSTR ")", 2772 MAC2STR(mac_addr), 2773 MAC2STR(p2p->go_neg_peer->intended_addr)); 2774 return; /* Ignore unexpected peer address */ 2775 } 2776 2777 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR, 2778 MAC2STR(mac_addr)); 2779 2780 p2p_clear_go_neg(p2p); 2781} 2782 2783 2784void p2p_group_formation_failed(struct p2p_data *p2p) 2785{ 2786 if (p2p->go_neg_peer == NULL) { 2787 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification"); 2788 return; /* No pending Group Formation */ 2789 } 2790 2791 p2p_dbg(p2p, "Group Formation failed with " MACSTR, 2792 MAC2STR(p2p->go_neg_peer->intended_addr)); 2793 2794 p2p_clear_go_neg(p2p); 2795} 2796 2797 2798struct p2p_data * p2p_init(const struct p2p_config *cfg) 2799{ 2800 struct p2p_data *p2p; 2801 2802 if (cfg->max_peers < 1 || 2803 cfg->passphrase_len < 8 || cfg->passphrase_len > 63) 2804 return NULL; 2805 2806 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg)); 2807 if (p2p == NULL) 2808 return NULL; 2809 p2p->cfg = (struct p2p_config *) (p2p + 1); 2810 os_memcpy(p2p->cfg, cfg, sizeof(*cfg)); 2811 if (cfg->dev_name) 2812 p2p->cfg->dev_name = os_strdup(cfg->dev_name); 2813 if (cfg->manufacturer) 2814 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer); 2815 if (cfg->model_name) 2816 p2p->cfg->model_name = os_strdup(cfg->model_name); 2817 if (cfg->model_number) 2818 p2p->cfg->model_number = os_strdup(cfg->model_number); 2819 if (cfg->serial_number) 2820 p2p->cfg->serial_number = os_strdup(cfg->serial_number); 2821 if (cfg->pref_chan) { 2822 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan * 2823 sizeof(struct p2p_channel)); 2824 if (p2p->cfg->pref_chan) { 2825 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan, 2826 cfg->num_pref_chan * 2827 sizeof(struct p2p_channel)); 2828 } else 2829 p2p->cfg->num_pref_chan = 0; 2830 } 2831 2832 p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash); 2833 2834 p2p->min_disc_int = 1; 2835 p2p->max_disc_int = 3; 2836 p2p->max_disc_tu = -1; 2837 2838 if (os_get_random(&p2p->next_tie_breaker, 1) < 0) 2839 p2p->next_tie_breaker = 0; 2840 p2p->next_tie_breaker &= 0x01; 2841 if (cfg->sd_request) 2842 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 2843 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE; 2844 if (cfg->concurrent_operations) 2845 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER; 2846 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 2847 2848 dl_list_init(&p2p->devices); 2849 2850 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 2851 p2p_expiration_timeout, p2p, NULL); 2852 2853 p2p->go_timeout = 100; 2854 p2p->client_timeout = 20; 2855 p2p->num_p2p_sd_queries = 0; 2856 2857 p2p_dbg(p2p, "initialized"); 2858 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 2859 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 2860 2861 return p2p; 2862} 2863 2864 2865void p2p_deinit(struct p2p_data *p2p) 2866{ 2867 struct p2ps_advertisement *adv, *prev; 2868 2869#ifdef CONFIG_WIFI_DISPLAY 2870 wpabuf_free(p2p->wfd_ie_beacon); 2871 wpabuf_free(p2p->wfd_ie_probe_req); 2872 wpabuf_free(p2p->wfd_ie_probe_resp); 2873 wpabuf_free(p2p->wfd_ie_assoc_req); 2874 wpabuf_free(p2p->wfd_ie_invitation); 2875 wpabuf_free(p2p->wfd_ie_prov_disc_req); 2876 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 2877 wpabuf_free(p2p->wfd_ie_go_neg); 2878 wpabuf_free(p2p->wfd_dev_info); 2879 wpabuf_free(p2p->wfd_assoc_bssid); 2880 wpabuf_free(p2p->wfd_coupled_sink_info); 2881#endif /* CONFIG_WIFI_DISPLAY */ 2882 2883 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL); 2884 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 2885 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2886 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2887 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL); 2888 p2p_flush(p2p); 2889 p2p_free_req_dev_types(p2p); 2890 os_free(p2p->cfg->dev_name); 2891 os_free(p2p->cfg->manufacturer); 2892 os_free(p2p->cfg->model_name); 2893 os_free(p2p->cfg->model_number); 2894 os_free(p2p->cfg->serial_number); 2895 os_free(p2p->cfg->pref_chan); 2896 os_free(p2p->groups); 2897 os_free(p2p->p2ps_prov); 2898 wpabuf_free(p2p->sd_resp); 2899 os_free(p2p->after_scan_tx); 2900 p2p_remove_wps_vendor_extensions(p2p); 2901 os_free(p2p->no_go_freq.range); 2902 2903 adv = p2p->p2ps_adv_list; 2904 while (adv) { 2905 prev = adv; 2906 adv = adv->next; 2907 os_free(prev); 2908 } 2909 2910 os_free(p2p); 2911} 2912 2913 2914void p2p_flush(struct p2p_data *p2p) 2915{ 2916 struct p2p_device *dev, *prev; 2917 p2p_stop_find(p2p); 2918 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device, 2919 list) { 2920 dl_list_del(&dev->list); 2921 p2p_device_free(p2p, dev); 2922 } 2923 p2p_free_sd_queries(p2p); 2924 os_free(p2p->after_scan_tx); 2925 p2p->after_scan_tx = NULL; 2926} 2927 2928 2929int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr) 2930{ 2931 struct p2p_device *dev; 2932 2933 dev = p2p_get_device(p2p, addr); 2934 if (dev == NULL) 2935 return -1; 2936 2937 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr)); 2938 2939 if (p2p->go_neg_peer == dev) { 2940 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL); 2941 p2p->go_neg_peer = NULL; 2942 } 2943 2944 dev->wps_method = WPS_NOT_READY; 2945 dev->oob_pw_id = 0; 2946 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 2947 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 2948 2949 /* Check if after_scan_tx is for this peer. If so free it */ 2950 if (p2p->after_scan_tx && 2951 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) { 2952 os_free(p2p->after_scan_tx); 2953 p2p->after_scan_tx = NULL; 2954 } 2955 2956 return 0; 2957} 2958 2959 2960int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name) 2961{ 2962 os_free(p2p->cfg->dev_name); 2963 if (dev_name) { 2964 p2p->cfg->dev_name = os_strdup(dev_name); 2965 if (p2p->cfg->dev_name == NULL) 2966 return -1; 2967 } else 2968 p2p->cfg->dev_name = NULL; 2969 return 0; 2970} 2971 2972 2973int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer) 2974{ 2975 os_free(p2p->cfg->manufacturer); 2976 p2p->cfg->manufacturer = NULL; 2977 if (manufacturer) { 2978 p2p->cfg->manufacturer = os_strdup(manufacturer); 2979 if (p2p->cfg->manufacturer == NULL) 2980 return -1; 2981 } 2982 2983 return 0; 2984} 2985 2986 2987int p2p_set_model_name(struct p2p_data *p2p, const char *model_name) 2988{ 2989 os_free(p2p->cfg->model_name); 2990 p2p->cfg->model_name = NULL; 2991 if (model_name) { 2992 p2p->cfg->model_name = os_strdup(model_name); 2993 if (p2p->cfg->model_name == NULL) 2994 return -1; 2995 } 2996 2997 return 0; 2998} 2999 3000 3001int p2p_set_model_number(struct p2p_data *p2p, const char *model_number) 3002{ 3003 os_free(p2p->cfg->model_number); 3004 p2p->cfg->model_number = NULL; 3005 if (model_number) { 3006 p2p->cfg->model_number = os_strdup(model_number); 3007 if (p2p->cfg->model_number == NULL) 3008 return -1; 3009 } 3010 3011 return 0; 3012} 3013 3014 3015int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number) 3016{ 3017 os_free(p2p->cfg->serial_number); 3018 p2p->cfg->serial_number = NULL; 3019 if (serial_number) { 3020 p2p->cfg->serial_number = os_strdup(serial_number); 3021 if (p2p->cfg->serial_number == NULL) 3022 return -1; 3023 } 3024 3025 return 0; 3026} 3027 3028 3029void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods) 3030{ 3031 p2p->cfg->config_methods = config_methods; 3032} 3033 3034 3035void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid) 3036{ 3037 os_memcpy(p2p->cfg->uuid, uuid, 16); 3038} 3039 3040 3041int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type) 3042{ 3043 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8); 3044 return 0; 3045} 3046 3047 3048int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8], 3049 size_t num_dev_types) 3050{ 3051 if (num_dev_types > P2P_SEC_DEVICE_TYPES) 3052 num_dev_types = P2P_SEC_DEVICE_TYPES; 3053 p2p->cfg->num_sec_dev_types = num_dev_types; 3054 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8); 3055 return 0; 3056} 3057 3058 3059void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p) 3060{ 3061 int i; 3062 3063 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 3064 wpabuf_free(p2p->wps_vendor_ext[i]); 3065 p2p->wps_vendor_ext[i] = NULL; 3066 } 3067} 3068 3069 3070int p2p_add_wps_vendor_extension(struct p2p_data *p2p, 3071 const struct wpabuf *vendor_ext) 3072{ 3073 int i; 3074 3075 if (vendor_ext == NULL) 3076 return -1; 3077 3078 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 3079 if (p2p->wps_vendor_ext[i] == NULL) 3080 break; 3081 } 3082 if (i >= P2P_MAX_WPS_VENDOR_EXT) 3083 return -1; 3084 3085 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext); 3086 if (p2p->wps_vendor_ext[i] == NULL) 3087 return -1; 3088 3089 return 0; 3090} 3091 3092 3093int p2p_set_country(struct p2p_data *p2p, const char *country) 3094{ 3095 os_memcpy(p2p->cfg->country, country, 3); 3096 return 0; 3097} 3098 3099 3100static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev) 3101{ 3102 if (dev->sd_pending_bcast_queries == 0) { 3103 /* Initialize with total number of registered broadcast 3104 * SD queries. */ 3105 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries; 3106 } 3107 3108 if (p2p_start_sd(p2p, dev) == 0) 3109 return 1; 3110 3111 if (dev->req_config_methods && 3112 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) { 3113 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 3114 MACSTR " (config methods 0x%x)", 3115 MAC2STR(dev->info.p2p_device_addr), 3116 dev->req_config_methods); 3117 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0) 3118 return 1; 3119 } 3120 3121 return 0; 3122} 3123 3124 3125void p2p_continue_find(struct p2p_data *p2p) 3126{ 3127 struct p2p_device *dev; 3128 int found; 3129 3130 p2p_set_state(p2p, P2P_SEARCH); 3131 3132 /* Continue from the device following the last iteration */ 3133 found = 0; 3134 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3135 if (dev == p2p->last_p2p_find_oper) { 3136 found = 1; 3137 continue; 3138 } 3139 if (!found) 3140 continue; 3141 if (p2p_pre_find_operation(p2p, dev) > 0) { 3142 p2p->last_p2p_find_oper = dev; 3143 return; 3144 } 3145 } 3146 3147 /* 3148 * Wrap around to the beginning of the list and continue until the last 3149 * iteration device. 3150 */ 3151 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3152 if (p2p_pre_find_operation(p2p, dev) > 0) { 3153 p2p->last_p2p_find_oper = dev; 3154 return; 3155 } 3156 if (dev == p2p->last_p2p_find_oper) 3157 break; 3158 } 3159 3160 p2p_listen_in_find(p2p, 1); 3161} 3162 3163 3164static void p2p_sd_cb(struct p2p_data *p2p, int success) 3165{ 3166 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d", 3167 success); 3168 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3169 3170 if (!success) { 3171 if (p2p->sd_peer) 3172 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3173 p2p->sd_peer = NULL; 3174 if (p2p->state != P2P_IDLE) 3175 p2p_continue_find(p2p); 3176 return; 3177 } 3178 3179 if (p2p->sd_peer == NULL) { 3180 p2p_dbg(p2p, "No SD peer entry known"); 3181 if (p2p->state != P2P_IDLE) 3182 p2p_continue_find(p2p); 3183 return; 3184 } 3185 3186 if (p2p->sd_query && p2p->sd_query->for_all_peers) { 3187 /* Update the pending broadcast SD query count for this device 3188 */ 3189 p2p->sd_peer->sd_pending_bcast_queries--; 3190 3191 /* 3192 * If there are no pending broadcast queries for this device, 3193 * mark it as done (-1). 3194 */ 3195 if (p2p->sd_peer->sd_pending_bcast_queries == 0) 3196 p2p->sd_peer->sd_pending_bcast_queries = -1; 3197 } 3198 3199 /* Wait for response from the peer */ 3200 p2p_set_state(p2p, P2P_SD_DURING_FIND); 3201 p2p_set_timeout(p2p, 0, 200000); 3202} 3203 3204 3205/** 3206 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state 3207 * @p2p: P2P module context from p2p_init() 3208 */ 3209static void p2p_retry_pd(struct p2p_data *p2p) 3210{ 3211 struct p2p_device *dev; 3212 3213 /* 3214 * Retry the prov disc req attempt only for the peer that the user had 3215 * requested. 3216 */ 3217 3218 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3219 if (os_memcmp(p2p->pending_pd_devaddr, 3220 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3221 continue; 3222 if (!dev->req_config_methods) 3223 continue; 3224 3225 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 3226 MACSTR " (config methods 0x%x)", 3227 MAC2STR(dev->info.p2p_device_addr), 3228 dev->req_config_methods); 3229 p2p_send_prov_disc_req(p2p, dev, 3230 dev->flags & P2P_DEV_PD_FOR_JOIN, 3231 p2p->pd_force_freq); 3232 return; 3233 } 3234} 3235 3236 3237static void p2p_prov_disc_cb(struct p2p_data *p2p, int success) 3238{ 3239 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d", 3240 success); 3241 3242 /* 3243 * Postpone resetting the pending action state till after we actually 3244 * time out. This allows us to take some action like notifying any 3245 * interested parties about no response to the request. 3246 * 3247 * When the timer (below) goes off we check in IDLE, SEARCH, or 3248 * LISTEN_ONLY state, which are the only allowed states to issue a PD 3249 * requests in, if this was still pending and then raise notification. 3250 */ 3251 3252 if (!success) { 3253 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3254 3255 if (p2p->user_initiated_pd && 3256 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY)) 3257 { 3258 /* Retry request from timeout to avoid busy loops */ 3259 p2p->pending_action_state = P2P_PENDING_PD; 3260 p2p_set_timeout(p2p, 0, 50000); 3261 } else if (p2p->state != P2P_IDLE) 3262 p2p_continue_find(p2p); 3263 else if (p2p->user_initiated_pd) { 3264 p2p->pending_action_state = P2P_PENDING_PD; 3265 p2p_set_timeout(p2p, 0, 300000); 3266 } 3267 return; 3268 } 3269 3270 /* 3271 * This postponing, of resetting pending_action_state, needs to be 3272 * done only for user initiated PD requests and not internal ones. 3273 */ 3274 if (p2p->user_initiated_pd) 3275 p2p->pending_action_state = P2P_PENDING_PD; 3276 else 3277 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3278 3279 /* Wait for response from the peer */ 3280 if (p2p->state == P2P_SEARCH) 3281 p2p_set_state(p2p, P2P_PD_DURING_FIND); 3282 p2p_set_timeout(p2p, 0, 200000); 3283} 3284 3285 3286static int p2p_check_after_scan_tx_continuation(struct p2p_data *p2p) 3287{ 3288 if (p2p->after_scan_tx_in_progress) { 3289 p2p->after_scan_tx_in_progress = 0; 3290 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING && 3291 p2p_run_after_scan(p2p)) 3292 return 1; 3293 if (p2p->state == P2P_SEARCH) { 3294 p2p_dbg(p2p, "Continue find after after_scan_tx completion"); 3295 p2p_continue_find(p2p); 3296 } 3297 } 3298 3299 return 0; 3300} 3301 3302 3303static void p2p_prov_disc_resp_cb(struct p2p_data *p2p, int success) 3304{ 3305 p2p_dbg(p2p, "Provision Discovery Response TX callback: success=%d", 3306 success); 3307 3308 if (p2p->send_action_in_progress) { 3309 p2p->send_action_in_progress = 0; 3310 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3311 } 3312 3313 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3314 3315 if (!success) 3316 goto continue_search; 3317 3318 if (!p2p->cfg->prov_disc_resp_cb || 3319 p2p->cfg->prov_disc_resp_cb(p2p->cfg->cb_ctx) < 1) 3320 goto continue_search; 3321 3322 p2p_dbg(p2p, 3323 "Post-Provision Discovery operations started - do not try to continue other P2P operations"); 3324 return; 3325 3326continue_search: 3327 p2p_check_after_scan_tx_continuation(p2p); 3328} 3329 3330 3331int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq, 3332 struct os_reltime *rx_time, int level, const u8 *ies, 3333 size_t ies_len) 3334{ 3335 if (os_reltime_before(rx_time, &p2p->find_start)) { 3336 /* 3337 * The driver may have cached (e.g., in cfg80211 BSS table) the 3338 * scan results for relatively long time. To avoid reporting 3339 * stale information, update P2P peers only based on results 3340 * that have based on frames received after the last p2p_find 3341 * operation was started. 3342 */ 3343 p2p_dbg(p2p, "Ignore old scan result for " MACSTR 3344 " (rx_time=%u.%06u)", 3345 MAC2STR(bssid), (unsigned int) rx_time->sec, 3346 (unsigned int) rx_time->usec); 3347 return 0; 3348 } 3349 3350 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1); 3351 3352 return 0; 3353} 3354 3355 3356void p2p_scan_res_handled(struct p2p_data *p2p) 3357{ 3358 if (!p2p->p2p_scan_running) { 3359 p2p_dbg(p2p, "p2p_scan was not running, but scan results received"); 3360 } 3361 p2p->p2p_scan_running = 0; 3362 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 3363 3364 if (p2p_run_after_scan(p2p)) 3365 return; 3366 if (p2p->state == P2P_SEARCH) 3367 p2p_continue_find(p2p); 3368} 3369 3370 3371void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id) 3372{ 3373 u8 dev_capab; 3374 u8 *len; 3375 3376#ifdef CONFIG_WIFI_DISPLAY 3377 if (p2p->wfd_ie_probe_req) 3378 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req); 3379#endif /* CONFIG_WIFI_DISPLAY */ 3380 3381 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]) 3382 wpabuf_put_buf(ies, 3383 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]); 3384 3385 len = p2p_buf_add_ie_hdr(ies); 3386 3387 dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3388 3389 /* P2PS requires Probe Request frames to include SD bit */ 3390 if (p2p->p2ps_seek && p2p->p2ps_seek_count) 3391 dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 3392 3393 p2p_buf_add_capability(ies, dev_capab, 0); 3394 3395 if (dev_id) 3396 p2p_buf_add_device_id(ies, dev_id); 3397 if (p2p->cfg->reg_class && p2p->cfg->channel) 3398 p2p_buf_add_listen_channel(ies, p2p->cfg->country, 3399 p2p->cfg->reg_class, 3400 p2p->cfg->channel); 3401 if (p2p->ext_listen_interval) 3402 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period, 3403 p2p->ext_listen_interval); 3404 3405 if (p2p->p2ps_seek && p2p->p2ps_seek_count) 3406 p2p_buf_add_service_hash(ies, p2p); 3407 3408 /* TODO: p2p_buf_add_operating_channel() if GO */ 3409 p2p_buf_update_ie_hdr(ies, len); 3410} 3411 3412 3413size_t p2p_scan_ie_buf_len(struct p2p_data *p2p) 3414{ 3415 size_t len = 100; 3416 3417#ifdef CONFIG_WIFI_DISPLAY 3418 if (p2p && p2p->wfd_ie_probe_req) 3419 len += wpabuf_len(p2p->wfd_ie_probe_req); 3420#endif /* CONFIG_WIFI_DISPLAY */ 3421 3422 if (p2p && p2p->vendor_elem && 3423 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]) 3424 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]); 3425 3426 return len; 3427} 3428 3429 3430int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end) 3431{ 3432 return p2p_attr_text(p2p_ie, buf, end); 3433} 3434 3435 3436static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success) 3437{ 3438 struct p2p_device *dev = p2p->go_neg_peer; 3439 int timeout; 3440 3441 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success); 3442 3443 if (dev == NULL) { 3444 p2p_dbg(p2p, "No pending GO Negotiation"); 3445 return; 3446 } 3447 3448 if (success) { 3449 if (dev->flags & P2P_DEV_USER_REJECTED) { 3450 p2p_set_state(p2p, P2P_IDLE); 3451 return; 3452 } 3453 } else if (dev->go_neg_req_sent) { 3454 /* Cancel the increment from p2p_connect_send() on failure */ 3455 dev->go_neg_req_sent--; 3456 } 3457 3458 if (!success && 3459 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) && 3460 !is_zero_ether_addr(dev->member_in_go_dev)) { 3461 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO", 3462 MAC2STR(dev->info.p2p_device_addr)); 3463 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3464 p2p_send_dev_disc_req(p2p, dev); 3465 return; 3466 } 3467 3468 /* 3469 * Use P2P find, if needed, to find the other device from its listen 3470 * channel. 3471 */ 3472 p2p_set_state(p2p, P2P_CONNECT); 3473 timeout = success ? 500000 : 100000; 3474 if (!success && p2p->go_neg_peer && 3475 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) { 3476 unsigned int r; 3477 /* 3478 * Peer is expected to wait our response and we will skip the 3479 * listen phase. Add some randomness to the wait time here to 3480 * make it less likely to hit cases where we could end up in 3481 * sync with peer not listening. 3482 */ 3483 if (os_get_random((u8 *) &r, sizeof(r)) < 0) 3484 r = 0; 3485 timeout += r % 100000; 3486 } 3487 p2p_set_timeout(p2p, 0, timeout); 3488} 3489 3490 3491static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success) 3492{ 3493 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d", 3494 success); 3495 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) { 3496 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore"); 3497 return; 3498 } 3499 p2p_set_state(p2p, P2P_CONNECT); 3500 p2p_set_timeout(p2p, 0, 500000); 3501} 3502 3503 3504static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success, 3505 const u8 *addr) 3506{ 3507 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success); 3508 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) { 3509 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status); 3510 } else if (success) { 3511 struct p2p_device *dev; 3512 dev = p2p_get_device(p2p, addr); 3513 if (dev && 3514 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) { 3515 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE; 3516 if ((p2p->state == P2P_SEARCH) || 3517 (p2p->state == P2P_LISTEN_ONLY)) { 3518 /* Clear our search state or Listen state since 3519 * now peer is awaiting response from our side. 3520 */ 3521 p2p_dbg(p2p, "Clear the P2P discovery state"); 3522 p2p_stop_find(p2p); 3523 } 3524 } 3525 } 3526} 3527 3528 3529static void p2p_go_neg_conf_cb(struct p2p_data *p2p, 3530 enum p2p_send_action_result result) 3531{ 3532 struct p2p_device *dev; 3533 3534 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result); 3535 if (result == P2P_SEND_ACTION_FAILED) { 3536 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3537 p2p_go_neg_failed(p2p, -1); 3538 return; 3539 } 3540 3541 dev = p2p->go_neg_peer; 3542 3543 if (result == P2P_SEND_ACTION_NO_ACK) { 3544 /* 3545 * Retry GO Negotiation Confirmation 3546 * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive 3547 * ACK for confirmation. 3548 */ 3549 if (dev && dev->go_neg_conf && 3550 dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) { 3551 p2p_dbg(p2p, "GO Negotiation Confirm retry %d", 3552 dev->go_neg_conf_sent); 3553 p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM; 3554 if (p2p_send_action(p2p, dev->go_neg_conf_freq, 3555 dev->info.p2p_device_addr, 3556 p2p->cfg->dev_addr, 3557 dev->info.p2p_device_addr, 3558 wpabuf_head(dev->go_neg_conf), 3559 wpabuf_len(dev->go_neg_conf), 0) >= 3560 0) { 3561 dev->go_neg_conf_sent++; 3562 return; 3563 } 3564 p2p_dbg(p2p, "Failed to re-send Action frame"); 3565 3566 /* 3567 * Continue with the assumption that the first attempt 3568 * went through and just the ACK frame was lost. 3569 */ 3570 } 3571 3572 /* 3573 * It looks like the TX status for GO Negotiation Confirm is 3574 * often showing failure even when the peer has actually 3575 * received the frame. Since the peer may change channels 3576 * immediately after having received the frame, we may not see 3577 * an Ack for retries, so just dropping a single frame may 3578 * trigger this. To allow the group formation to succeed if the 3579 * peer did indeed receive the frame, continue regardless of 3580 * the TX status. 3581 */ 3582 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported"); 3583 } 3584 3585 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3586 3587 if (dev == NULL) 3588 return; 3589 3590 p2p_go_complete(p2p, dev); 3591} 3592 3593 3594void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 3595 const u8 *src, const u8 *bssid, 3596 enum p2p_send_action_result result) 3597{ 3598 enum p2p_pending_action_state state; 3599 int success; 3600 3601 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR 3602 " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)", 3603 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), 3604 MAC2STR(bssid), result, p2p_state_txt(p2p->state)); 3605 success = result == P2P_SEND_ACTION_SUCCESS; 3606 state = p2p->pending_action_state; 3607 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3608 switch (state) { 3609 case P2P_NO_PENDING_ACTION: 3610 if (p2p->send_action_in_progress) { 3611 p2p->send_action_in_progress = 0; 3612 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3613 } 3614 p2p_check_after_scan_tx_continuation(p2p); 3615 break; 3616 case P2P_PENDING_GO_NEG_REQUEST: 3617 p2p_go_neg_req_cb(p2p, success); 3618 break; 3619 case P2P_PENDING_GO_NEG_RESPONSE: 3620 p2p_go_neg_resp_cb(p2p, success); 3621 break; 3622 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE: 3623 p2p_go_neg_resp_failure_cb(p2p, success, dst); 3624 break; 3625 case P2P_PENDING_GO_NEG_CONFIRM: 3626 p2p_go_neg_conf_cb(p2p, result); 3627 break; 3628 case P2P_PENDING_SD: 3629 p2p_sd_cb(p2p, success); 3630 break; 3631 case P2P_PENDING_PD: 3632 p2p_prov_disc_cb(p2p, success); 3633 break; 3634 case P2P_PENDING_PD_RESPONSE: 3635 p2p_prov_disc_resp_cb(p2p, success); 3636 break; 3637 case P2P_PENDING_INVITATION_REQUEST: 3638 p2p_invitation_req_cb(p2p, success); 3639 break; 3640 case P2P_PENDING_INVITATION_RESPONSE: 3641 p2p_invitation_resp_cb(p2p, success); 3642 break; 3643 case P2P_PENDING_DEV_DISC_REQUEST: 3644 p2p_dev_disc_req_cb(p2p, success); 3645 break; 3646 case P2P_PENDING_DEV_DISC_RESPONSE: 3647 p2p_dev_disc_resp_cb(p2p, success); 3648 break; 3649 case P2P_PENDING_GO_DISC_REQ: 3650 p2p_go_disc_req_cb(p2p, success); 3651 break; 3652 } 3653 3654 p2p->after_scan_tx_in_progress = 0; 3655} 3656 3657 3658void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq, 3659 unsigned int duration) 3660{ 3661 if (freq == p2p->pending_client_disc_freq) { 3662 p2p_dbg(p2p, "Client discoverability remain-awake completed"); 3663 p2p->pending_client_disc_freq = 0; 3664 return; 3665 } 3666 3667 if (freq != p2p->pending_listen_freq) { 3668 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)", 3669 freq, duration, p2p->pending_listen_freq); 3670 return; 3671 } 3672 3673 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback", 3674 p2p->pending_listen_sec, p2p->pending_listen_usec, 3675 p2p->pending_listen_freq); 3676 p2p->in_listen = 1; 3677 p2p->drv_in_listen = freq; 3678 if (p2p->pending_listen_sec || p2p->pending_listen_usec) { 3679 /* 3680 * Add 20 msec extra wait to avoid race condition with driver 3681 * remain-on-channel end event, i.e., give driver more time to 3682 * complete the operation before our timeout expires. 3683 */ 3684 p2p_set_timeout(p2p, p2p->pending_listen_sec, 3685 p2p->pending_listen_usec + 20000); 3686 } 3687 3688 p2p->pending_listen_freq = 0; 3689} 3690 3691 3692int p2p_listen_end(struct p2p_data *p2p, unsigned int freq) 3693{ 3694 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq); 3695 p2p->drv_in_listen = 0; 3696 if (p2p->in_listen) 3697 return 0; /* Internal timeout will trigger the next step */ 3698 3699 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) { 3700 if (p2p->go_neg_peer->connect_reqs >= 120) { 3701 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3702 p2p_go_neg_failed(p2p, -1); 3703 return 0; 3704 } 3705 3706 p2p_set_state(p2p, P2P_CONNECT); 3707 p2p_connect_send(p2p, p2p->go_neg_peer); 3708 return 1; 3709 } else if (p2p->state == P2P_SEARCH) { 3710 if (p2p->p2p_scan_running) { 3711 /* 3712 * Search is already in progress. This can happen if 3713 * an Action frame RX is reported immediately after 3714 * the end of a remain-on-channel operation and the 3715 * response frame to that is sent using an offchannel 3716 * operation while in p2p_find. Avoid an attempt to 3717 * restart a scan here. 3718 */ 3719 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one"); 3720 return 1; 3721 } 3722 if (p2p->pending_listen_freq) { 3723 /* 3724 * Better wait a bit if the driver is unable to start 3725 * offchannel operation for some reason. p2p_search() 3726 * will be started from internal timeout. 3727 */ 3728 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop"); 3729 p2p_set_timeout(p2p, 0, 100000); 3730 return 1; 3731 } 3732 if (p2p->search_delay) { 3733 p2p_dbg(p2p, "Delay search operation by %u ms", 3734 p2p->search_delay); 3735 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3736 (p2p->search_delay % 1000) * 1000); 3737 return 1; 3738 } 3739 p2p_search(p2p); 3740 return 1; 3741 } 3742 3743 return 0; 3744} 3745 3746 3747static void p2p_timeout_connect(struct p2p_data *p2p) 3748{ 3749 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3750 if (p2p->go_neg_peer && 3751 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 3752 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed"); 3753 p2p_go_neg_failed(p2p, -1); 3754 return; 3755 } 3756 if (p2p->go_neg_peer && 3757 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) && 3758 p2p->go_neg_peer->connect_reqs < 120) { 3759 p2p_dbg(p2p, "Peer expected to wait our response - skip listen"); 3760 p2p_connect_send(p2p, p2p->go_neg_peer); 3761 return; 3762 } 3763 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) { 3764 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)"); 3765 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3766 p2p_set_timeout(p2p, 0, 30000); 3767 return; 3768 } 3769 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3770 p2p_listen_in_find(p2p, 0); 3771} 3772 3773 3774static void p2p_timeout_connect_listen(struct p2p_data *p2p) 3775{ 3776 if (p2p->go_neg_peer) { 3777 if (p2p->drv_in_listen) { 3778 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete"); 3779 return; 3780 } 3781 3782 if (p2p->go_neg_peer->connect_reqs >= 120) { 3783 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3784 p2p_go_neg_failed(p2p, -1); 3785 return; 3786 } 3787 3788 p2p_set_state(p2p, P2P_CONNECT); 3789 p2p_connect_send(p2p, p2p->go_neg_peer); 3790 } else 3791 p2p_set_state(p2p, P2P_IDLE); 3792} 3793 3794 3795static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p) 3796{ 3797 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 3798 3799 if (p2p->cfg->is_concurrent_session_active && 3800 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx)) 3801 p2p_set_timeout(p2p, 0, 500000); 3802 else 3803 p2p_set_timeout(p2p, 0, 200000); 3804} 3805 3806 3807static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p) 3808{ 3809 struct p2p_device *dev = p2p->go_neg_peer; 3810 3811 if (dev == NULL) { 3812 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait"); 3813 return; 3814 } 3815 3816 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation"); 3817 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT); 3818 p2p_listen_in_find(p2p, 0); 3819} 3820 3821 3822static void p2p_timeout_sd_during_find(struct p2p_data *p2p) 3823{ 3824 p2p_dbg(p2p, "Service Discovery Query timeout"); 3825 if (p2p->sd_peer) { 3826 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3827 p2p->sd_peer = NULL; 3828 } 3829 p2p_continue_find(p2p); 3830} 3831 3832 3833static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p) 3834{ 3835 p2p_dbg(p2p, "Provision Discovery Request timeout"); 3836 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3837 p2p_continue_find(p2p); 3838} 3839 3840 3841static void p2p_timeout_prov_disc_req(struct p2p_data *p2p) 3842{ 3843 u32 adv_id = 0; 3844 u8 *adv_mac = NULL; 3845 3846 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3847 3848 /* 3849 * For user initiated PD requests that we have not gotten any responses 3850 * for while in IDLE state, we retry them a couple of times before 3851 * giving up. 3852 */ 3853 if (!p2p->user_initiated_pd) 3854 return; 3855 3856 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout"); 3857 3858 if (p2p->pd_retries) { 3859 p2p->pd_retries--; 3860 p2p_retry_pd(p2p); 3861 } else { 3862 struct p2p_device *dev; 3863 int for_join = 0; 3864 3865 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3866 if (os_memcmp(p2p->pending_pd_devaddr, 3867 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3868 continue; 3869 if (dev->req_config_methods && 3870 (dev->flags & P2P_DEV_PD_FOR_JOIN)) 3871 for_join = 1; 3872 } 3873 3874 if (p2p->p2ps_prov) { 3875 adv_id = p2p->p2ps_prov->adv_id; 3876 adv_mac = p2p->p2ps_prov->adv_mac; 3877 } 3878 3879 if (p2p->cfg->prov_disc_fail) 3880 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, 3881 p2p->pending_pd_devaddr, 3882 for_join ? 3883 P2P_PROV_DISC_TIMEOUT_JOIN : 3884 P2P_PROV_DISC_TIMEOUT, 3885 adv_id, adv_mac, NULL); 3886 p2p_reset_pending_pd(p2p); 3887 } 3888} 3889 3890 3891static void p2p_timeout_invite(struct p2p_data *p2p) 3892{ 3893 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3894 p2p_set_state(p2p, P2P_INVITE_LISTEN); 3895 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 3896 /* 3897 * Better remain on operating channel instead of listen channel 3898 * when running a group. 3899 */ 3900 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel"); 3901 p2p_set_timeout(p2p, 0, 100000); 3902 return; 3903 } 3904 p2p_listen_in_find(p2p, 0); 3905} 3906 3907 3908static void p2p_timeout_invite_listen(struct p2p_data *p2p) 3909{ 3910 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) { 3911 p2p_set_state(p2p, P2P_INVITE); 3912 p2p_invite_send(p2p, p2p->invite_peer, 3913 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id); 3914 } else { 3915 if (p2p->invite_peer) { 3916 p2p_dbg(p2p, "Invitation Request retry limit reached"); 3917 if (p2p->cfg->invitation_result) 3918 p2p->cfg->invitation_result( 3919 p2p->cfg->cb_ctx, -1, NULL, NULL, 3920 p2p->invite_peer->info.p2p_device_addr, 3921 0, 0); 3922 } 3923 p2p_set_state(p2p, P2P_IDLE); 3924 } 3925} 3926 3927 3928static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx) 3929{ 3930 struct p2p_data *p2p = eloop_ctx; 3931 3932 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state)); 3933 3934 p2p->in_listen = 0; 3935 if (p2p->drv_in_listen) { 3936 p2p_dbg(p2p, "Driver is still in listen state - stop it"); 3937 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 3938 } 3939 3940 switch (p2p->state) { 3941 case P2P_IDLE: 3942 /* Check if we timed out waiting for PD req */ 3943 if (p2p->pending_action_state == P2P_PENDING_PD) 3944 p2p_timeout_prov_disc_req(p2p); 3945 break; 3946 case P2P_SEARCH: 3947 /* Check if we timed out waiting for PD req */ 3948 if (p2p->pending_action_state == P2P_PENDING_PD) 3949 p2p_timeout_prov_disc_req(p2p); 3950 if (p2p->search_delay && !p2p->in_search_delay) { 3951 p2p_dbg(p2p, "Delay search operation by %u ms", 3952 p2p->search_delay); 3953 p2p->in_search_delay = 1; 3954 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3955 (p2p->search_delay % 1000) * 1000); 3956 break; 3957 } 3958 p2p->in_search_delay = 0; 3959 p2p_search(p2p); 3960 break; 3961 case P2P_CONNECT: 3962 p2p_timeout_connect(p2p); 3963 break; 3964 case P2P_CONNECT_LISTEN: 3965 p2p_timeout_connect_listen(p2p); 3966 break; 3967 case P2P_GO_NEG: 3968 break; 3969 case P2P_LISTEN_ONLY: 3970 /* Check if we timed out waiting for PD req */ 3971 if (p2p->pending_action_state == P2P_PENDING_PD) 3972 p2p_timeout_prov_disc_req(p2p); 3973 3974 if (p2p->ext_listen_only) { 3975 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed"); 3976 p2p->ext_listen_only = 0; 3977 p2p_set_state(p2p, P2P_IDLE); 3978 } 3979 break; 3980 case P2P_WAIT_PEER_CONNECT: 3981 p2p_timeout_wait_peer_connect(p2p); 3982 break; 3983 case P2P_WAIT_PEER_IDLE: 3984 p2p_timeout_wait_peer_idle(p2p); 3985 break; 3986 case P2P_SD_DURING_FIND: 3987 p2p_timeout_sd_during_find(p2p); 3988 break; 3989 case P2P_PROVISIONING: 3990 break; 3991 case P2P_PD_DURING_FIND: 3992 p2p_timeout_prov_disc_during_find(p2p); 3993 break; 3994 case P2P_INVITE: 3995 p2p_timeout_invite(p2p); 3996 break; 3997 case P2P_INVITE_LISTEN: 3998 p2p_timeout_invite_listen(p2p); 3999 break; 4000 } 4001} 4002 4003 4004int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr) 4005{ 4006 struct p2p_device *dev; 4007 4008 dev = p2p_get_device(p2p, peer_addr); 4009 p2p_dbg(p2p, "Local request to reject connection attempts by peer " 4010 MACSTR, MAC2STR(peer_addr)); 4011 if (dev == NULL) { 4012 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr)); 4013 return -1; 4014 } 4015 dev->status = P2P_SC_FAIL_REJECTED_BY_USER; 4016 dev->flags |= P2P_DEV_USER_REJECTED; 4017 return 0; 4018} 4019 4020 4021const char * p2p_wps_method_text(enum p2p_wps_method method) 4022{ 4023 switch (method) { 4024 case WPS_NOT_READY: 4025 return "not-ready"; 4026 case WPS_PIN_DISPLAY: 4027 return "Display"; 4028 case WPS_PIN_KEYPAD: 4029 return "Keypad"; 4030 case WPS_PBC: 4031 return "PBC"; 4032 case WPS_NFC: 4033 return "NFC"; 4034 case WPS_P2PS: 4035 return "P2PS"; 4036 } 4037 4038 return "??"; 4039} 4040 4041 4042static const char * p2p_go_state_text(enum p2p_go_state go_state) 4043{ 4044 switch (go_state) { 4045 case UNKNOWN_GO: 4046 return "unknown"; 4047 case LOCAL_GO: 4048 return "local"; 4049 case REMOTE_GO: 4050 return "remote"; 4051 } 4052 4053 return "??"; 4054} 4055 4056 4057const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p, 4058 const u8 *addr, int next) 4059{ 4060 struct p2p_device *dev; 4061 4062 if (addr) 4063 dev = p2p_get_device(p2p, addr); 4064 else 4065 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4066 4067 if (dev && next) { 4068 dev = dl_list_first(&dev->list, struct p2p_device, list); 4069 if (&dev->list == &p2p->devices) 4070 dev = NULL; 4071 } 4072 4073 if (dev == NULL) 4074 return NULL; 4075 4076 return &dev->info; 4077} 4078 4079 4080int p2p_get_peer_info_txt(const struct p2p_peer_info *info, 4081 char *buf, size_t buflen) 4082{ 4083 struct p2p_device *dev; 4084 int res; 4085 char *pos, *end; 4086 struct os_reltime now; 4087 4088 if (info == NULL) 4089 return -1; 4090 4091 dev = (struct p2p_device *) (((u8 *) info) - 4092 offsetof(struct p2p_device, info)); 4093 4094 pos = buf; 4095 end = buf + buflen; 4096 4097 os_get_reltime(&now); 4098 res = os_snprintf(pos, end - pos, 4099 "age=%d\n" 4100 "listen_freq=%d\n" 4101 "wps_method=%s\n" 4102 "interface_addr=" MACSTR "\n" 4103 "member_in_go_dev=" MACSTR "\n" 4104 "member_in_go_iface=" MACSTR "\n" 4105 "go_neg_req_sent=%d\n" 4106 "go_state=%s\n" 4107 "dialog_token=%u\n" 4108 "intended_addr=" MACSTR "\n" 4109 "country=%c%c\n" 4110 "oper_freq=%d\n" 4111 "req_config_methods=0x%x\n" 4112 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n" 4113 "status=%d\n" 4114 "invitation_reqs=%u\n", 4115 (int) (now.sec - dev->last_seen.sec), 4116 dev->listen_freq, 4117 p2p_wps_method_text(dev->wps_method), 4118 MAC2STR(dev->interface_addr), 4119 MAC2STR(dev->member_in_go_dev), 4120 MAC2STR(dev->member_in_go_iface), 4121 dev->go_neg_req_sent, 4122 p2p_go_state_text(dev->go_state), 4123 dev->dialog_token, 4124 MAC2STR(dev->intended_addr), 4125 dev->country[0] ? dev->country[0] : '_', 4126 dev->country[1] ? dev->country[1] : '_', 4127 dev->oper_freq, 4128 dev->req_config_methods, 4129 dev->flags & P2P_DEV_PROBE_REQ_ONLY ? 4130 "[PROBE_REQ_ONLY]" : "", 4131 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "", 4132 dev->flags & P2P_DEV_NOT_YET_READY ? 4133 "[NOT_YET_READY]" : "", 4134 dev->flags & P2P_DEV_PD_PEER_DISPLAY ? 4135 "[PD_PEER_DISPLAY]" : "", 4136 dev->flags & P2P_DEV_PD_PEER_KEYPAD ? 4137 "[PD_PEER_KEYPAD]" : "", 4138 dev->flags & P2P_DEV_PD_PEER_P2PS ? 4139 "[PD_PEER_P2PS]" : "", 4140 dev->flags & P2P_DEV_USER_REJECTED ? 4141 "[USER_REJECTED]" : "", 4142 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ? 4143 "[PEER_WAITING_RESPONSE]" : "", 4144 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ? 4145 "[PREFER_PERSISTENT_GROUP]" : "", 4146 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ? 4147 "[WAIT_GO_NEG_RESPONSE]" : "", 4148 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ? 4149 "[WAIT_GO_NEG_CONFIRM]" : "", 4150 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ? 4151 "[GROUP_CLIENT_ONLY]" : "", 4152 dev->flags & P2P_DEV_FORCE_FREQ ? 4153 "[FORCE_FREQ]" : "", 4154 dev->flags & P2P_DEV_PD_FOR_JOIN ? 4155 "[PD_FOR_JOIN]" : "", 4156 dev->status, 4157 dev->invitation_reqs); 4158 if (os_snprintf_error(end - pos, res)) 4159 return pos - buf; 4160 pos += res; 4161 4162 if (dev->ext_listen_period) { 4163 res = os_snprintf(pos, end - pos, 4164 "ext_listen_period=%u\n" 4165 "ext_listen_interval=%u\n", 4166 dev->ext_listen_period, 4167 dev->ext_listen_interval); 4168 if (os_snprintf_error(end - pos, res)) 4169 return pos - buf; 4170 pos += res; 4171 } 4172 4173 if (dev->oper_ssid_len) { 4174 res = os_snprintf(pos, end - pos, 4175 "oper_ssid=%s\n", 4176 wpa_ssid_txt(dev->oper_ssid, 4177 dev->oper_ssid_len)); 4178 if (os_snprintf_error(end - pos, res)) 4179 return pos - buf; 4180 pos += res; 4181 } 4182 4183#ifdef CONFIG_WIFI_DISPLAY 4184 if (dev->info.wfd_subelems) { 4185 res = os_snprintf(pos, end - pos, "wfd_subelems="); 4186 if (os_snprintf_error(end - pos, res)) 4187 return pos - buf; 4188 pos += res; 4189 4190 pos += wpa_snprintf_hex(pos, end - pos, 4191 wpabuf_head(dev->info.wfd_subelems), 4192 wpabuf_len(dev->info.wfd_subelems)); 4193 4194 res = os_snprintf(pos, end - pos, "\n"); 4195 if (os_snprintf_error(end - pos, res)) 4196 return pos - buf; 4197 pos += res; 4198 } 4199#endif /* CONFIG_WIFI_DISPLAY */ 4200 4201 return pos - buf; 4202} 4203 4204 4205int p2p_peer_known(struct p2p_data *p2p, const u8 *addr) 4206{ 4207 return p2p_get_device(p2p, addr) != NULL; 4208} 4209 4210 4211void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled) 4212{ 4213 if (enabled) { 4214 p2p_dbg(p2p, "Client discoverability enabled"); 4215 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 4216 } else { 4217 p2p_dbg(p2p, "Client discoverability disabled"); 4218 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 4219 } 4220} 4221 4222 4223static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1, 4224 u32 duration2, u32 interval2) 4225{ 4226 struct wpabuf *req; 4227 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL; 4228 u8 *len; 4229 4230 req = wpabuf_alloc(100); 4231 if (req == NULL) 4232 return NULL; 4233 4234 if (duration1 || interval1) { 4235 os_memset(&desc1, 0, sizeof(desc1)); 4236 desc1.count_type = 1; 4237 desc1.duration = duration1; 4238 desc1.interval = interval1; 4239 ptr1 = &desc1; 4240 4241 if (duration2 || interval2) { 4242 os_memset(&desc2, 0, sizeof(desc2)); 4243 desc2.count_type = 2; 4244 desc2.duration = duration2; 4245 desc2.interval = interval2; 4246 ptr2 = &desc2; 4247 } 4248 } 4249 4250 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1); 4251 len = p2p_buf_add_ie_hdr(req); 4252 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2); 4253 p2p_buf_update_ie_hdr(req, len); 4254 4255 return req; 4256} 4257 4258 4259int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr, 4260 const u8 *own_interface_addr, unsigned int freq, 4261 u32 duration1, u32 interval1, u32 duration2, 4262 u32 interval2) 4263{ 4264 struct wpabuf *req; 4265 4266 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR 4267 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u " 4268 "dur2=%u int2=%u", 4269 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr), 4270 freq, duration1, interval1, duration2, interval2); 4271 4272 req = p2p_build_presence_req(duration1, interval1, duration2, 4273 interval2); 4274 if (req == NULL) 4275 return -1; 4276 4277 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 4278 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr, 4279 go_interface_addr, 4280 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 4281 p2p_dbg(p2p, "Failed to send Action frame"); 4282 } 4283 wpabuf_free(req); 4284 4285 return 0; 4286} 4287 4288 4289static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa, 4290 size_t noa_len, u8 dialog_token) 4291{ 4292 struct wpabuf *resp; 4293 u8 *len; 4294 4295 resp = wpabuf_alloc(100 + noa_len); 4296 if (resp == NULL) 4297 return NULL; 4298 4299 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token); 4300 len = p2p_buf_add_ie_hdr(resp); 4301 p2p_buf_add_status(resp, status); 4302 if (noa) { 4303 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE); 4304 wpabuf_put_le16(resp, noa_len); 4305 wpabuf_put_data(resp, noa, noa_len); 4306 } else 4307 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL); 4308 p2p_buf_update_ie_hdr(resp, len); 4309 4310 return resp; 4311} 4312 4313 4314static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 4315 const u8 *sa, const u8 *data, size_t len, 4316 int rx_freq) 4317{ 4318 struct p2p_message msg; 4319 u8 status; 4320 struct wpabuf *resp; 4321 size_t g; 4322 struct p2p_group *group = NULL; 4323 int parsed = 0; 4324 u8 noa[50]; 4325 int noa_len; 4326 4327 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request"); 4328 4329 for (g = 0; g < p2p->num_groups; g++) { 4330 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]), 4331 ETH_ALEN) == 0) { 4332 group = p2p->groups[g]; 4333 break; 4334 } 4335 } 4336 if (group == NULL) { 4337 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group " 4338 MACSTR, MAC2STR(da)); 4339 return; 4340 } 4341 4342 if (p2p_parse(data, len, &msg) < 0) { 4343 p2p_dbg(p2p, "Failed to parse P2P Presence Request"); 4344 status = P2P_SC_FAIL_INVALID_PARAMS; 4345 goto fail; 4346 } 4347 parsed = 1; 4348 4349 if (msg.noa == NULL) { 4350 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request"); 4351 status = P2P_SC_FAIL_INVALID_PARAMS; 4352 goto fail; 4353 } 4354 4355 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len); 4356 4357fail: 4358 if (p2p->cfg->get_noa) 4359 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa, 4360 sizeof(noa)); 4361 else 4362 noa_len = -1; 4363 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL, 4364 noa_len > 0 ? noa_len : 0, 4365 msg.dialog_token); 4366 if (parsed) 4367 p2p_parse_free(&msg); 4368 if (resp == NULL) 4369 return; 4370 4371 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 4372 if (p2p_send_action(p2p, rx_freq, sa, da, da, 4373 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 4374 p2p_dbg(p2p, "Failed to send Action frame"); 4375 } 4376 wpabuf_free(resp); 4377} 4378 4379 4380static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 4381 const u8 *sa, const u8 *data, size_t len) 4382{ 4383 struct p2p_message msg; 4384 4385 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response"); 4386 4387 if (p2p_parse(data, len, &msg) < 0) { 4388 p2p_dbg(p2p, "Failed to parse P2P Presence Response"); 4389 return; 4390 } 4391 4392 if (msg.status == NULL || msg.noa == NULL) { 4393 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response"); 4394 p2p_parse_free(&msg); 4395 return; 4396 } 4397 4398 if (p2p->cfg->presence_resp) { 4399 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status, 4400 msg.noa, msg.noa_len); 4401 } 4402 4403 if (*msg.status) { 4404 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u", 4405 *msg.status); 4406 p2p_parse_free(&msg); 4407 return; 4408 } 4409 4410 p2p_dbg(p2p, "P2P Presence Request was accepted"); 4411 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA", 4412 msg.noa, msg.noa_len); 4413 /* TODO: process NoA */ 4414 p2p_parse_free(&msg); 4415} 4416 4417 4418static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx) 4419{ 4420 struct p2p_data *p2p = eloop_ctx; 4421 4422 if (p2p->ext_listen_interval) { 4423 /* Schedule next extended listen timeout */ 4424 eloop_register_timeout(p2p->ext_listen_interval_sec, 4425 p2p->ext_listen_interval_usec, 4426 p2p_ext_listen_timeout, p2p, NULL); 4427 } 4428 4429 if ((p2p->cfg->is_p2p_in_progress && 4430 p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) || 4431 (p2p->pending_action_state == P2P_PENDING_PD && 4432 p2p->pd_retries > 0)) { 4433 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)", 4434 p2p_state_txt(p2p->state)); 4435 return; 4436 } 4437 4438 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) { 4439 /* 4440 * This should not really happen, but it looks like the Listen 4441 * command may fail is something else (e.g., a scan) was 4442 * running at an inconvenient time. As a workaround, allow new 4443 * Extended Listen operation to be started. 4444 */ 4445 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again"); 4446 p2p->ext_listen_only = 0; 4447 p2p_set_state(p2p, P2P_IDLE); 4448 } 4449 4450 if (p2p->state != P2P_IDLE) { 4451 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state)); 4452 return; 4453 } 4454 4455 p2p_dbg(p2p, "Extended Listen timeout"); 4456 p2p->ext_listen_only = 1; 4457 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) { 4458 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing"); 4459 p2p->ext_listen_only = 0; 4460 } 4461} 4462 4463 4464int p2p_ext_listen(struct p2p_data *p2p, unsigned int period, 4465 unsigned int interval) 4466{ 4467 if (period > 65535 || interval > 65535 || period > interval || 4468 (period == 0 && interval > 0) || (period > 0 && interval == 0)) { 4469 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u", 4470 period, interval); 4471 return -1; 4472 } 4473 4474 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 4475 4476 if (interval == 0) { 4477 p2p_dbg(p2p, "Disabling Extended Listen Timing"); 4478 p2p->ext_listen_period = 0; 4479 p2p->ext_listen_interval = 0; 4480 return 0; 4481 } 4482 4483 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec", 4484 period, interval); 4485 p2p->ext_listen_period = period; 4486 p2p->ext_listen_interval = interval; 4487 p2p->ext_listen_interval_sec = interval / 1000; 4488 p2p->ext_listen_interval_usec = (interval % 1000) * 1000; 4489 4490 eloop_register_timeout(p2p->ext_listen_interval_sec, 4491 p2p->ext_listen_interval_usec, 4492 p2p_ext_listen_timeout, p2p, NULL); 4493 4494 return 0; 4495} 4496 4497 4498void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 4499 const u8 *ie, size_t ie_len) 4500{ 4501 struct p2p_message msg; 4502 4503 if (bssid == NULL || ie == NULL) 4504 return; 4505 4506 os_memset(&msg, 0, sizeof(msg)); 4507 if (p2p_parse_ies(ie, ie_len, &msg)) 4508 return; 4509 if (msg.minor_reason_code == NULL) { 4510 p2p_parse_free(&msg); 4511 return; 4512 } 4513 4514 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR 4515 " reason_code=%u minor_reason_code=%u", 4516 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4517 4518 p2p_parse_free(&msg); 4519} 4520 4521 4522void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 4523 const u8 *ie, size_t ie_len) 4524{ 4525 struct p2p_message msg; 4526 4527 if (bssid == NULL || ie == NULL) 4528 return; 4529 4530 os_memset(&msg, 0, sizeof(msg)); 4531 if (p2p_parse_ies(ie, ie_len, &msg)) 4532 return; 4533 if (msg.minor_reason_code == NULL) { 4534 p2p_parse_free(&msg); 4535 return; 4536 } 4537 4538 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR 4539 " reason_code=%u minor_reason_code=%u", 4540 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4541 4542 p2p_parse_free(&msg); 4543} 4544 4545 4546void p2p_set_managed_oper(struct p2p_data *p2p, int enabled) 4547{ 4548 if (enabled) { 4549 p2p_dbg(p2p, "Managed P2P Device operations enabled"); 4550 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED; 4551 } else { 4552 p2p_dbg(p2p, "Managed P2P Device operations disabled"); 4553 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED; 4554 } 4555} 4556 4557 4558int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class, 4559 u8 *op_channel) 4560{ 4561 return p2p_channel_random_social(&p2p->channels, op_class, op_channel); 4562} 4563 4564 4565int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel, 4566 u8 forced) 4567{ 4568 if (p2p_channel_to_freq(reg_class, channel) < 0) 4569 return -1; 4570 4571 /* 4572 * Listen channel was set in configuration or set by control interface; 4573 * cannot override it. 4574 */ 4575 if (p2p->cfg->channel_forced && forced == 0) { 4576 p2p_dbg(p2p, 4577 "Listen channel was previously configured - do not override based on optimization"); 4578 return -1; 4579 } 4580 4581 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u", 4582 reg_class, channel); 4583 4584 if (p2p->state == P2P_IDLE) { 4585 p2p->cfg->reg_class = reg_class; 4586 p2p->cfg->channel = channel; 4587 p2p->cfg->channel_forced = forced; 4588 } else { 4589 p2p_dbg(p2p, "Defer setting listen channel"); 4590 p2p->pending_reg_class = reg_class; 4591 p2p->pending_channel = channel; 4592 p2p->pending_channel_forced = forced; 4593 } 4594 4595 return 0; 4596} 4597 4598 4599u8 p2p_get_listen_channel(struct p2p_data *p2p) 4600{ 4601 return p2p->cfg->channel; 4602} 4603 4604 4605int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len) 4606{ 4607 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len)); 4608 if (postfix == NULL) { 4609 p2p->cfg->ssid_postfix_len = 0; 4610 return 0; 4611 } 4612 if (len > sizeof(p2p->cfg->ssid_postfix)) 4613 return -1; 4614 os_memcpy(p2p->cfg->ssid_postfix, postfix, len); 4615 p2p->cfg->ssid_postfix_len = len; 4616 return 0; 4617} 4618 4619 4620int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel, 4621 int cfg_op_channel) 4622{ 4623 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0) 4624 return -1; 4625 4626 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u", 4627 op_reg_class, op_channel); 4628 p2p->cfg->op_reg_class = op_reg_class; 4629 p2p->cfg->op_channel = op_channel; 4630 p2p->cfg->cfg_op_channel = cfg_op_channel; 4631 return 0; 4632} 4633 4634 4635int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan, 4636 const struct p2p_channel *pref_chan) 4637{ 4638 struct p2p_channel *n; 4639 4640 if (pref_chan) { 4641 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel)); 4642 if (n == NULL) 4643 return -1; 4644 os_memcpy(n, pref_chan, 4645 num_pref_chan * sizeof(struct p2p_channel)); 4646 } else 4647 n = NULL; 4648 4649 os_free(p2p->cfg->pref_chan); 4650 p2p->cfg->pref_chan = n; 4651 p2p->cfg->num_pref_chan = num_pref_chan; 4652 4653 return 0; 4654} 4655 4656 4657int p2p_set_no_go_freq(struct p2p_data *p2p, 4658 const struct wpa_freq_range_list *list) 4659{ 4660 struct wpa_freq_range *tmp; 4661 4662 if (list == NULL || list->num == 0) { 4663 os_free(p2p->no_go_freq.range); 4664 p2p->no_go_freq.range = NULL; 4665 p2p->no_go_freq.num = 0; 4666 return 0; 4667 } 4668 4669 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range)); 4670 if (tmp == NULL) 4671 return -1; 4672 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range)); 4673 os_free(p2p->no_go_freq.range); 4674 p2p->no_go_freq.range = tmp; 4675 p2p->no_go_freq.num = list->num; 4676 p2p_dbg(p2p, "Updated no GO chan list"); 4677 4678 return 0; 4679} 4680 4681 4682int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr, 4683 u8 *iface_addr) 4684{ 4685 struct p2p_device *dev = p2p_get_device(p2p, dev_addr); 4686 if (dev == NULL || is_zero_ether_addr(dev->interface_addr)) 4687 return -1; 4688 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN); 4689 return 0; 4690} 4691 4692 4693int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr, 4694 u8 *dev_addr) 4695{ 4696 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4697 if (dev == NULL) 4698 return -1; 4699 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN); 4700 return 0; 4701} 4702 4703 4704void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr) 4705{ 4706 os_memcpy(p2p->peer_filter, addr, ETH_ALEN); 4707 if (is_zero_ether_addr(p2p->peer_filter)) 4708 p2p_dbg(p2p, "Disable peer filter"); 4709 else 4710 p2p_dbg(p2p, "Enable peer filter for " MACSTR, 4711 MAC2STR(p2p->peer_filter)); 4712} 4713 4714 4715void p2p_set_cross_connect(struct p2p_data *p2p, int enabled) 4716{ 4717 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled"); 4718 if (p2p->cross_connect == enabled) 4719 return; 4720 p2p->cross_connect = enabled; 4721 /* TODO: may need to tear down any action group where we are GO(?) */ 4722} 4723 4724 4725int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr) 4726{ 4727 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4728 if (dev == NULL) 4729 return -1; 4730 if (dev->oper_freq <= 0) 4731 return -1; 4732 return dev->oper_freq; 4733} 4734 4735 4736void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled) 4737{ 4738 p2p_dbg(p2p, "Intra BSS distribution %s", 4739 enabled ? "enabled" : "disabled"); 4740 p2p->cfg->p2p_intra_bss = enabled; 4741} 4742 4743 4744void p2p_update_channel_list(struct p2p_data *p2p, 4745 const struct p2p_channels *chan, 4746 const struct p2p_channels *cli_chan) 4747{ 4748 p2p_dbg(p2p, "Update channel list"); 4749 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels)); 4750 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 4751 os_memcpy(&p2p->cfg->cli_channels, cli_chan, 4752 sizeof(struct p2p_channels)); 4753 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 4754} 4755 4756 4757int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 4758 const u8 *src, const u8 *bssid, const u8 *buf, 4759 size_t len, unsigned int wait_time) 4760{ 4761 if (p2p->p2p_scan_running) { 4762 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes"); 4763 if (p2p->after_scan_tx) { 4764 p2p_dbg(p2p, "Dropped previous pending Action frame TX"); 4765 os_free(p2p->after_scan_tx); 4766 } 4767 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) + 4768 len); 4769 if (p2p->after_scan_tx == NULL) 4770 return -1; 4771 p2p->after_scan_tx->freq = freq; 4772 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN); 4773 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN); 4774 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN); 4775 p2p->after_scan_tx->len = len; 4776 p2p->after_scan_tx->wait_time = wait_time; 4777 os_memcpy(p2p->after_scan_tx + 1, buf, len); 4778 return 0; 4779 } 4780 4781 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid, 4782 buf, len, wait_time); 4783} 4784 4785 4786void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5, 4787 int freq_overall) 4788{ 4789 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d", 4790 freq_24, freq_5, freq_overall); 4791 p2p->best_freq_24 = freq_24; 4792 p2p->best_freq_5 = freq_5; 4793 p2p->best_freq_overall = freq_overall; 4794} 4795 4796 4797void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq) 4798{ 4799 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq); 4800 p2p->own_freq_preference = freq; 4801} 4802 4803 4804const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p) 4805{ 4806 if (p2p == NULL || p2p->go_neg_peer == NULL) 4807 return NULL; 4808 return p2p->go_neg_peer->info.p2p_device_addr; 4809} 4810 4811 4812const struct p2p_peer_info * 4813p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next) 4814{ 4815 struct p2p_device *dev; 4816 4817 if (addr) { 4818 dev = p2p_get_device(p2p, addr); 4819 if (!dev) 4820 return NULL; 4821 4822 if (!next) { 4823 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 4824 return NULL; 4825 4826 return &dev->info; 4827 } else { 4828 do { 4829 dev = dl_list_first(&dev->list, 4830 struct p2p_device, 4831 list); 4832 if (!dev || &dev->list == &p2p->devices) 4833 return NULL; 4834 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY); 4835 } 4836 } else { 4837 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4838 if (!dev) 4839 return NULL; 4840 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 4841 dev = dl_list_first(&dev->list, 4842 struct p2p_device, 4843 list); 4844 if (!dev || &dev->list == &p2p->devices) 4845 return NULL; 4846 } 4847 } 4848 4849 return &dev->info; 4850} 4851 4852 4853int p2p_in_progress(struct p2p_data *p2p) 4854{ 4855 if (p2p == NULL) 4856 return 0; 4857 if (p2p->state == P2P_SEARCH) 4858 return 2; 4859 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING; 4860} 4861 4862 4863void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout, 4864 u8 client_timeout) 4865{ 4866 if (p2p) { 4867 p2p->go_timeout = go_timeout; 4868 p2p->client_timeout = client_timeout; 4869 } 4870} 4871 4872 4873#ifdef CONFIG_WIFI_DISPLAY 4874 4875static void p2p_update_wfd_ie_groups(struct p2p_data *p2p) 4876{ 4877 size_t g; 4878 struct p2p_group *group; 4879 4880 for (g = 0; g < p2p->num_groups; g++) { 4881 group = p2p->groups[g]; 4882 p2p_group_force_beacon_update_ies(group); 4883 } 4884} 4885 4886 4887int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie) 4888{ 4889 wpabuf_free(p2p->wfd_ie_beacon); 4890 p2p->wfd_ie_beacon = ie; 4891 p2p_update_wfd_ie_groups(p2p); 4892 return 0; 4893} 4894 4895 4896int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie) 4897{ 4898 wpabuf_free(p2p->wfd_ie_probe_req); 4899 p2p->wfd_ie_probe_req = ie; 4900 return 0; 4901} 4902 4903 4904int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie) 4905{ 4906 wpabuf_free(p2p->wfd_ie_probe_resp); 4907 p2p->wfd_ie_probe_resp = ie; 4908 p2p_update_wfd_ie_groups(p2p); 4909 return 0; 4910} 4911 4912 4913int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie) 4914{ 4915 wpabuf_free(p2p->wfd_ie_assoc_req); 4916 p2p->wfd_ie_assoc_req = ie; 4917 return 0; 4918} 4919 4920 4921int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie) 4922{ 4923 wpabuf_free(p2p->wfd_ie_invitation); 4924 p2p->wfd_ie_invitation = ie; 4925 return 0; 4926} 4927 4928 4929int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie) 4930{ 4931 wpabuf_free(p2p->wfd_ie_prov_disc_req); 4932 p2p->wfd_ie_prov_disc_req = ie; 4933 return 0; 4934} 4935 4936 4937int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie) 4938{ 4939 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 4940 p2p->wfd_ie_prov_disc_resp = ie; 4941 return 0; 4942} 4943 4944 4945int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie) 4946{ 4947 wpabuf_free(p2p->wfd_ie_go_neg); 4948 p2p->wfd_ie_go_neg = ie; 4949 return 0; 4950} 4951 4952 4953int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem) 4954{ 4955 wpabuf_free(p2p->wfd_dev_info); 4956 if (elem) { 4957 p2p->wfd_dev_info = wpabuf_dup(elem); 4958 if (p2p->wfd_dev_info == NULL) 4959 return -1; 4960 } else 4961 p2p->wfd_dev_info = NULL; 4962 4963 return 0; 4964} 4965 4966 4967int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem) 4968{ 4969 wpabuf_free(p2p->wfd_assoc_bssid); 4970 if (elem) { 4971 p2p->wfd_assoc_bssid = wpabuf_dup(elem); 4972 if (p2p->wfd_assoc_bssid == NULL) 4973 return -1; 4974 } else 4975 p2p->wfd_assoc_bssid = NULL; 4976 4977 return 0; 4978} 4979 4980 4981int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p, 4982 const struct wpabuf *elem) 4983{ 4984 wpabuf_free(p2p->wfd_coupled_sink_info); 4985 if (elem) { 4986 p2p->wfd_coupled_sink_info = wpabuf_dup(elem); 4987 if (p2p->wfd_coupled_sink_info == NULL) 4988 return -1; 4989 } else 4990 p2p->wfd_coupled_sink_info = NULL; 4991 4992 return 0; 4993} 4994 4995#endif /* CONFIG_WIFI_DISPLAY */ 4996 4997 4998int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int, 4999 int max_disc_tu) 5000{ 5001 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0) 5002 return -1; 5003 5004 p2p->min_disc_int = min_disc_int; 5005 p2p->max_disc_int = max_disc_int; 5006 p2p->max_disc_tu = max_disc_tu; 5007 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d", 5008 min_disc_int, max_disc_int, max_disc_tu); 5009 5010 return 0; 5011} 5012 5013 5014void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...) 5015{ 5016 va_list ap; 5017 char buf[500]; 5018 5019 if (!p2p->cfg->debug_print) 5020 return; 5021 5022 va_start(ap, fmt); 5023 vsnprintf(buf, sizeof(buf), fmt, ap); 5024 buf[sizeof(buf) - 1] = '\0'; 5025 va_end(ap); 5026 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf); 5027} 5028 5029 5030void p2p_info(struct p2p_data *p2p, const char *fmt, ...) 5031{ 5032 va_list ap; 5033 char buf[500]; 5034 5035 if (!p2p->cfg->debug_print) 5036 return; 5037 5038 va_start(ap, fmt); 5039 vsnprintf(buf, sizeof(buf), fmt, ap); 5040 buf[sizeof(buf) - 1] = '\0'; 5041 va_end(ap); 5042 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf); 5043} 5044 5045 5046void p2p_err(struct p2p_data *p2p, const char *fmt, ...) 5047{ 5048 va_list ap; 5049 char buf[500]; 5050 5051 if (!p2p->cfg->debug_print) 5052 return; 5053 5054 va_start(ap, fmt); 5055 vsnprintf(buf, sizeof(buf), fmt, ap); 5056 buf[sizeof(buf) - 1] = '\0'; 5057 va_end(ap); 5058 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf); 5059} 5060 5061 5062void p2p_loop_on_known_peers(struct p2p_data *p2p, 5063 void (*peer_callback)(struct p2p_peer_info *peer, 5064 void *user_data), 5065 void *user_data) 5066{ 5067 struct p2p_device *dev, *n; 5068 5069 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) { 5070 peer_callback(&dev->info, user_data); 5071 } 5072} 5073 5074 5075#ifdef CONFIG_WPS_NFC 5076 5077static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p, 5078 int client_freq, 5079 const u8 *go_dev_addr, 5080 const u8 *ssid, size_t ssid_len) 5081{ 5082 struct wpabuf *buf; 5083 u8 op_class, channel; 5084 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP; 5085 5086 buf = wpabuf_alloc(1000); 5087 if (buf == NULL) 5088 return NULL; 5089 5090 op_class = p2p->cfg->reg_class; 5091 channel = p2p->cfg->channel; 5092 5093 p2p_buf_add_capability(buf, p2p->dev_capab & 5094 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 5095 p2p_buf_add_device_info(buf, p2p, NULL); 5096 5097 if (p2p->num_groups > 0) { 5098 int freq = p2p_group_get_freq(p2p->groups[0]); 5099 role = P2P_GO_IN_A_GROUP; 5100 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) { 5101 p2p_dbg(p2p, 5102 "Unknown GO operating frequency %d MHz for NFC handover", 5103 freq); 5104 wpabuf_free(buf); 5105 return NULL; 5106 } 5107 } else if (client_freq > 0) { 5108 role = P2P_CLIENT_IN_A_GROUP; 5109 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) { 5110 p2p_dbg(p2p, 5111 "Unknown client operating frequency %d MHz for NFC handover", 5112 client_freq); 5113 wpabuf_free(buf); 5114 return NULL; 5115 } 5116 } 5117 5118 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class, 5119 channel, role); 5120 5121 if (p2p->num_groups > 0) { 5122 /* Limit number of clients to avoid very long message */ 5123 p2p_buf_add_group_info(p2p->groups[0], buf, 5); 5124 p2p_group_buf_add_id(p2p->groups[0], buf); 5125 } else if (client_freq > 0 && 5126 go_dev_addr && !is_zero_ether_addr(go_dev_addr) && 5127 ssid && ssid_len > 0) { 5128 /* 5129 * Add the optional P2P Group ID to indicate in which group this 5130 * device is a P2P Client. 5131 */ 5132 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len); 5133 } 5134 5135 return buf; 5136} 5137 5138 5139struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p, 5140 int client_freq, 5141 const u8 *go_dev_addr, 5142 const u8 *ssid, size_t ssid_len) 5143{ 5144 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 5145 ssid_len); 5146} 5147 5148 5149struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p, 5150 int client_freq, 5151 const u8 *go_dev_addr, 5152 const u8 *ssid, size_t ssid_len) 5153{ 5154 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 5155 ssid_len); 5156} 5157 5158 5159int p2p_process_nfc_connection_handover(struct p2p_data *p2p, 5160 struct p2p_nfc_params *params) 5161{ 5162 struct p2p_message msg; 5163 struct p2p_device *dev; 5164 const u8 *p2p_dev_addr; 5165 int freq; 5166 enum p2p_role_indication role; 5167 5168 params->next_step = NO_ACTION; 5169 5170 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len, 5171 params->p2p_attr, params->p2p_len, &msg)) { 5172 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC"); 5173 p2p_parse_free(&msg); 5174 return -1; 5175 } 5176 5177 if (msg.p2p_device_addr) 5178 p2p_dev_addr = msg.p2p_device_addr; 5179 else if (msg.device_id) 5180 p2p_dev_addr = msg.device_id; 5181 else { 5182 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 5183 p2p_parse_free(&msg); 5184 return -1; 5185 } 5186 5187 if (msg.oob_dev_password) { 5188 os_memcpy(params->oob_dev_pw, msg.oob_dev_password, 5189 msg.oob_dev_password_len); 5190 params->oob_dev_pw_len = msg.oob_dev_password_len; 5191 } 5192 5193 dev = p2p_create_device(p2p, p2p_dev_addr); 5194 if (dev == NULL) { 5195 p2p_parse_free(&msg); 5196 return -1; 5197 } 5198 5199 params->peer = &dev->info; 5200 5201 os_get_reltime(&dev->last_seen); 5202 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 5203 p2p_copy_wps_info(p2p, dev, 0, &msg); 5204 5205 if (!msg.oob_go_neg_channel) { 5206 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included"); 5207 return -1; 5208 } 5209 5210 if (msg.oob_go_neg_channel[3] == 0 && 5211 msg.oob_go_neg_channel[4] == 0) 5212 freq = 0; 5213 else 5214 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3], 5215 msg.oob_go_neg_channel[4]); 5216 if (freq < 0) { 5217 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel"); 5218 return -1; 5219 } 5220 role = msg.oob_go_neg_channel[5]; 5221 5222 if (role == P2P_GO_IN_A_GROUP) { 5223 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq); 5224 params->go_freq = freq; 5225 } else if (role == P2P_CLIENT_IN_A_GROUP) { 5226 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz", 5227 freq); 5228 params->go_freq = freq; 5229 } else 5230 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq); 5231 dev->oob_go_neg_freq = freq; 5232 5233 if (!params->sel && role != P2P_GO_IN_A_GROUP) { 5234 freq = p2p_channel_to_freq(p2p->cfg->reg_class, 5235 p2p->cfg->channel); 5236 if (freq < 0) { 5237 p2p_dbg(p2p, "Own listen channel not known"); 5238 return -1; 5239 } 5240 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq); 5241 dev->oob_go_neg_freq = freq; 5242 } 5243 5244 if (msg.group_id) { 5245 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN); 5246 params->go_ssid_len = msg.group_id_len - ETH_ALEN; 5247 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN, 5248 params->go_ssid_len); 5249 } 5250 5251 if (dev->flags & P2P_DEV_USER_REJECTED) { 5252 p2p_dbg(p2p, "Do not report rejected device"); 5253 p2p_parse_free(&msg); 5254 return 0; 5255 } 5256 5257 if (!(dev->flags & P2P_DEV_REPORTED)) { 5258 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info, 5259 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 5260 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 5261 } 5262 p2p_parse_free(&msg); 5263 5264 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0) 5265 params->next_step = BOTH_GO; 5266 else if (role == P2P_GO_IN_A_GROUP) 5267 params->next_step = JOIN_GROUP; 5268 else if (role == P2P_CLIENT_IN_A_GROUP) { 5269 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 5270 params->next_step = PEER_CLIENT; 5271 } else if (p2p->num_groups > 0) 5272 params->next_step = AUTH_JOIN; 5273 else if (params->sel) 5274 params->next_step = INIT_GO_NEG; 5275 else 5276 params->next_step = RESP_GO_NEG; 5277 5278 return 0; 5279} 5280 5281 5282void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id, 5283 int go_intent, 5284 const u8 *own_interface_addr) 5285{ 5286 5287 p2p->authorized_oob_dev_pw_id = dev_pw_id; 5288 if (dev_pw_id == 0) { 5289 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover"); 5290 return; 5291 } 5292 5293 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover", 5294 dev_pw_id); 5295 5296 p2p->go_intent = go_intent; 5297 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 5298} 5299 5300#endif /* CONFIG_WPS_NFC */ 5301 5302 5303int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len) 5304{ 5305 if (len < 8 || len > 63) 5306 return -1; 5307 p2p->cfg->passphrase_len = len; 5308 return 0; 5309} 5310 5311 5312void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem) 5313{ 5314 p2p->vendor_elem = vendor_elem; 5315} 5316 5317 5318void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx) 5319{ 5320 struct p2p_data *p2p = eloop_ctx; 5321 5322 p2p_dbg(p2p, 5323 "Timeout on waiting peer to become ready for GO Negotiation"); 5324 p2p_go_neg_failed(p2p, -1); 5325} 5326