p2p.c revision 8da800a193fb6f8832218715f82a7b4e2d2ad338
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 "wps/wps_i.h" 17#include "p2p_i.h" 18#include "p2p.h" 19 20 21static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx); 22static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev); 23static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 24 const u8 *sa, const u8 *data, size_t len, 25 int rx_freq); 26static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 27 const u8 *sa, const u8 *data, 28 size_t len); 29static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx); 30static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx); 31 32 33/* 34 * p2p_scan recovery timeout 35 * 36 * Many drivers are using 30 second timeout on scan results. Allow a bit larger 37 * timeout for this to avoid hitting P2P timeout unnecessarily. 38 */ 39#define P2P_SCAN_TIMEOUT 35 40 41/** 42 * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer 43 * entries will be removed 44 */ 45#ifdef ANDROID_P2P 46#define P2P_PEER_EXPIRATION_AGE 30 47#else 48#define P2P_PEER_EXPIRATION_AGE 300 49#endif 50 51#define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2) 52 53#ifdef ANDROID_P2P 54int p2p_connection_in_progress(struct p2p_data *p2p) 55{ 56 int ret = 0; 57 58 switch (p2p->state) { 59 case P2P_CONNECT: 60 case P2P_CONNECT_LISTEN: 61 case P2P_GO_NEG: 62 case P2P_WAIT_PEER_CONNECT: 63 case P2P_WAIT_PEER_IDLE: 64 case P2P_PROVISIONING: 65 case P2P_INVITE: 66 case P2P_INVITE_LISTEN: 67 ret = 1; 68 break; 69 70 default: 71 wpa_printf(MSG_DEBUG, "p2p_connection_in_progress state %d", p2p->state); 72 ret = 0; 73 } 74 75 return ret; 76} 77#endif 78 79static void p2p_expire_peers(struct p2p_data *p2p) 80{ 81 struct p2p_device *dev, *n; 82 struct os_time now; 83 size_t i; 84 85 os_get_time(&now); 86 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) { 87 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec) 88 continue; 89 90 if (p2p->cfg->go_connected && 91 p2p->cfg->go_connected(p2p->cfg->cb_ctx, 92 dev->info.p2p_device_addr)) { 93 /* 94 * We are connected as a client to a group in which the 95 * peer is the GO, so do not expire the peer entry. 96 */ 97 os_get_time(&dev->last_seen); 98 continue; 99 } 100 101 for (i = 0; i < p2p->num_groups; i++) { 102 if (p2p_group_is_client_connected( 103 p2p->groups[i], dev->info.p2p_device_addr)) 104 break; 105 } 106 if (i < p2p->num_groups) { 107 /* 108 * The peer is connected as a client in a group where 109 * we are the GO, so do not expire the peer entry. 110 */ 111 os_get_time(&dev->last_seen); 112 continue; 113 } 114 115#ifdef ANDROID_P2P 116 /* If Connection is in progress, don't expire the peer 117 */ 118 if (p2p_connection_in_progress(p2p)) 119 continue; 120#endif 121 122 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Expiring old peer " 123 "entry " MACSTR, MAC2STR(dev->info.p2p_device_addr)); 124#ifdef ANDROID_P2P 125 /* SD_FAIR_POLICY: Update the current sd_dev_list pointer to next device */ 126 if(&dev->list == p2p->sd_dev_list) 127 p2p->sd_dev_list = dev->list.next; 128#endif 129 dl_list_del(&dev->list); 130 p2p_device_free(p2p, dev); 131 } 132} 133 134 135static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx) 136{ 137 struct p2p_data *p2p = eloop_ctx; 138 p2p_expire_peers(p2p); 139 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 140 p2p_expiration_timeout, p2p, NULL); 141} 142 143 144static const char * p2p_state_txt(int state) 145{ 146 switch (state) { 147 case P2P_IDLE: 148 return "IDLE"; 149 case P2P_SEARCH: 150 return "SEARCH"; 151 case P2P_CONNECT: 152 return "CONNECT"; 153 case P2P_CONNECT_LISTEN: 154 return "CONNECT_LISTEN"; 155 case P2P_GO_NEG: 156 return "GO_NEG"; 157 case P2P_LISTEN_ONLY: 158 return "LISTEN_ONLY"; 159 case P2P_WAIT_PEER_CONNECT: 160 return "WAIT_PEER_CONNECT"; 161 case P2P_WAIT_PEER_IDLE: 162 return "WAIT_PEER_IDLE"; 163 case P2P_SD_DURING_FIND: 164 return "SD_DURING_FIND"; 165 case P2P_PROVISIONING: 166 return "PROVISIONING"; 167 case P2P_PD_DURING_FIND: 168 return "PD_DURING_FIND"; 169 case P2P_INVITE: 170 return "INVITE"; 171 case P2P_INVITE_LISTEN: 172 return "INVITE_LISTEN"; 173 case P2P_SEARCH_WHEN_READY: 174 return "SEARCH_WHEN_READY"; 175 case P2P_CONTINUE_SEARCH_WHEN_READY: 176 return "CONTINUE_SEARCH_WHEN_READY"; 177 default: 178 return "?"; 179 } 180} 181 182 183u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr) 184{ 185 struct p2p_device *dev = NULL; 186 187 if (!addr || !p2p) 188 return 0; 189 190 dev = p2p_get_device(p2p, addr); 191 if (dev) 192 return dev->wps_prov_info; 193 else 194 return 0; 195} 196 197 198void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr) 199{ 200 struct p2p_device *dev = NULL; 201 202 if (!addr || !p2p) 203 return; 204 205 dev = p2p_get_device(p2p, addr); 206 if (dev) 207 dev->wps_prov_info = 0; 208} 209 210 211void p2p_set_state(struct p2p_data *p2p, int new_state) 212{ 213 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: State %s -> %s", 214 p2p_state_txt(p2p->state), p2p_state_txt(new_state)); 215 p2p->state = new_state; 216} 217 218 219void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec) 220{ 221 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 222 "P2P: Set timeout (state=%s): %u.%06u sec", 223 p2p_state_txt(p2p->state), sec, usec); 224 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 225 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL); 226} 227 228 229void p2p_clear_timeout(struct p2p_data *p2p) 230{ 231 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Clear timeout (state=%s)", 232 p2p_state_txt(p2p->state)); 233 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 234} 235 236 237void p2p_go_neg_failed(struct p2p_data *p2p, struct p2p_device *peer, 238 int status) 239{ 240 struct p2p_go_neg_results res; 241 p2p_clear_timeout(p2p); 242 p2p_set_state(p2p, P2P_IDLE); 243 if (p2p->go_neg_peer) { 244 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 245 p2p->go_neg_peer->wps_method = WPS_NOT_READY; 246 } 247 p2p->go_neg_peer = NULL; 248 249 os_memset(&res, 0, sizeof(res)); 250 res.status = status; 251 if (peer) { 252 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, 253 ETH_ALEN); 254 os_memcpy(res.peer_interface_addr, peer->intended_addr, 255 ETH_ALEN); 256 } 257 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 258} 259 260 261static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc) 262{ 263 unsigned int r, tu; 264 int freq; 265 struct wpabuf *ies; 266 267 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 268 "P2P: Starting short listen state (state=%s)", 269 p2p_state_txt(p2p->state)); 270 271 freq = p2p_channel_to_freq(p2p->cfg->country, p2p->cfg->reg_class, 272 p2p->cfg->channel); 273 if (freq < 0) { 274 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 275 "P2P: Unknown regulatory class/channel"); 276 return; 277 } 278 279 os_get_random((u8 *) &r, sizeof(r)); 280 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) + 281 p2p->min_disc_int) * 100; 282 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu) 283 tu = p2p->max_disc_tu; 284 if (!dev_disc && tu < 100) 285 tu = 100; /* Need to wait in non-device discovery use cases */ 286 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen) 287 tu = p2p->cfg->max_listen * 1000 / 1024; 288 289 if (tu == 0) { 290 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Skip listen state " 291 "since duration was 0 TU"); 292 p2p_set_timeout(p2p, 0, 0); 293 return; 294 } 295 296 p2p->pending_listen_freq = freq; 297 p2p->pending_listen_sec = 0; 298 p2p->pending_listen_usec = 1024 * tu; 299 300 ies = p2p_build_probe_resp_ies(p2p); 301 if (ies == NULL) 302 return; 303 304 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000, 305 ies) < 0) { 306 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 307 "P2P: Failed to start listen mode"); 308 p2p->pending_listen_freq = 0; 309 } 310 wpabuf_free(ies); 311} 312 313 314int p2p_listen(struct p2p_data *p2p, unsigned int timeout) 315{ 316 int freq; 317 struct wpabuf *ies; 318 319 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 320 "P2P: Going to listen(only) state"); 321 322 freq = p2p_channel_to_freq(p2p->cfg->country, p2p->cfg->reg_class, 323 p2p->cfg->channel); 324 if (freq < 0) { 325 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 326 "P2P: Unknown regulatory class/channel"); 327 return -1; 328 } 329 330 p2p->pending_listen_freq = freq; 331 p2p->pending_listen_sec = timeout / 1000; 332 p2p->pending_listen_usec = (timeout % 1000) * 1000; 333 334 if (p2p->p2p_scan_running) { 335 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) { 336 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 337 "P2P: p2p_scan running - connect is already " 338 "pending - skip listen"); 339 return 0; 340 } 341 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 342 "P2P: p2p_scan running - delay start of listen state"); 343 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN; 344 return 0; 345 } 346 347 ies = p2p_build_probe_resp_ies(p2p); 348 if (ies == NULL) 349 return -1; 350 351 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) { 352 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 353 "P2P: Failed to start listen mode"); 354 p2p->pending_listen_freq = 0; 355 wpabuf_free(ies); 356 return -1; 357 } 358 wpabuf_free(ies); 359 360 p2p_set_state(p2p, P2P_LISTEN_ONLY); 361 362 return 0; 363} 364 365 366static void p2p_device_clear_reported(struct p2p_data *p2p) 367{ 368 struct p2p_device *dev; 369 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) 370 dev->flags &= ~P2P_DEV_REPORTED; 371} 372 373 374/** 375 * p2p_get_device - Fetch a peer entry 376 * @p2p: P2P module context from p2p_init() 377 * @addr: P2P Device Address of the peer 378 * Returns: Pointer to the device entry or %NULL if not found 379 */ 380struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr) 381{ 382 struct p2p_device *dev; 383 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 384 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0) 385 return dev; 386 } 387 return NULL; 388} 389 390 391/** 392 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address 393 * @p2p: P2P module context from p2p_init() 394 * @addr: P2P Interface Address of the peer 395 * Returns: Pointer to the device entry or %NULL if not found 396 */ 397struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p, 398 const u8 *addr) 399{ 400 struct p2p_device *dev; 401 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 402 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0) 403 return dev; 404 } 405 return NULL; 406} 407 408 409/** 410 * p2p_create_device - Create a peer entry 411 * @p2p: P2P module context from p2p_init() 412 * @addr: P2P Device Address of the peer 413 * Returns: Pointer to the device entry or %NULL on failure 414 * 415 * If there is already an entry for the peer, it will be returned instead of 416 * creating a new one. 417 */ 418static struct p2p_device * p2p_create_device(struct p2p_data *p2p, 419 const u8 *addr) 420{ 421 struct p2p_device *dev, *oldest = NULL; 422 size_t count = 0; 423 424 dev = p2p_get_device(p2p, addr); 425 if (dev) 426 return dev; 427 428 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 429 count++; 430 if (oldest == NULL || 431 os_time_before(&dev->last_seen, &oldest->last_seen)) 432 oldest = dev; 433 } 434 if (count + 1 > p2p->cfg->max_peers && oldest) { 435 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 436 "P2P: Remove oldest peer entry to make room for a new " 437 "peer"); 438#ifdef ANDROID_P2P 439 /* SD_FAIR_POLICY: Update the current sd_dev_list pointer to next device */ 440 if(&oldest->list == p2p->sd_dev_list) 441 p2p->sd_dev_list = oldest->list.next; 442#endif 443 dl_list_del(&oldest->list); 444 p2p_device_free(p2p, oldest); 445 } 446 447 dev = os_zalloc(sizeof(*dev)); 448 if (dev == NULL) 449 return NULL; 450 dl_list_add(&p2p->devices, &dev->list); 451 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN); 452 453 return dev; 454} 455 456 457static void p2p_copy_client_info(struct p2p_device *dev, 458 struct p2p_client_info *cli) 459{ 460 os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len); 461 dev->info.device_name[cli->dev_name_len] = '\0'; 462 dev->info.dev_capab = cli->dev_capab; 463 dev->info.config_methods = cli->config_methods; 464 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8); 465 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types; 466 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types, 467 dev->info.wps_sec_dev_type_list_len); 468} 469 470 471static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr, 472 const u8 *go_interface_addr, int freq, 473 const u8 *gi, size_t gi_len) 474{ 475 struct p2p_group_info info; 476 size_t c; 477 struct p2p_device *dev; 478 479 if (gi == NULL) 480 return 0; 481 482 if (p2p_group_info_parse(gi, gi_len, &info) < 0) 483 return -1; 484 485 /* 486 * Clear old data for this group; if the devices are still in the 487 * group, the information will be restored in the loop following this. 488 */ 489 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 490 if (os_memcmp(dev->member_in_go_iface, go_interface_addr, 491 ETH_ALEN) == 0) { 492 os_memset(dev->member_in_go_iface, 0, ETH_ALEN); 493 os_memset(dev->member_in_go_dev, 0, ETH_ALEN); 494 } 495 } 496 497 for (c = 0; c < info.num_clients; c++) { 498 struct p2p_client_info *cli = &info.client[c]; 499 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr, 500 ETH_ALEN) == 0) 501 continue; /* ignore our own entry */ 502 dev = p2p_get_device(p2p, cli->p2p_device_addr); 503 if (dev) { 504 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY | 505 P2P_DEV_PROBE_REQ_ONLY)) { 506 /* 507 * Update information since we have not 508 * received this directly from the client. 509 */ 510 p2p_copy_client_info(dev, cli); 511 } else { 512 /* 513 * Need to update P2P Client Discoverability 514 * flag since it is valid only in P2P Group 515 * Info attribute. 516 */ 517 dev->info.dev_capab &= 518 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 519 dev->info.dev_capab |= 520 cli->dev_capab & 521 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 522 } 523 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 524 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 525 } 526 } else { 527 dev = p2p_create_device(p2p, cli->p2p_device_addr); 528 if (dev == NULL) 529 continue; 530 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 531 p2p_copy_client_info(dev, cli); 532 dev->oper_freq = freq; 533 p2p->cfg->dev_found(p2p->cfg->cb_ctx, 534 dev->info.p2p_device_addr, 535 &dev->info, 1); 536 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 537 } 538 539 os_memcpy(dev->interface_addr, cli->p2p_interface_addr, 540 ETH_ALEN); 541 os_get_time(&dev->last_seen); 542 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN); 543 os_memcpy(dev->member_in_go_iface, go_interface_addr, 544 ETH_ALEN); 545 } 546 547 return 0; 548} 549 550 551static void p2p_copy_wps_info(struct p2p_device *dev, int probe_req, 552 const struct p2p_message *msg) 553{ 554 os_memcpy(dev->info.device_name, msg->device_name, 555 sizeof(dev->info.device_name)); 556 557 if (msg->manufacturer && 558 msg->manufacturer_len < sizeof(dev->info.manufacturer)) { 559 os_memset(dev->info.manufacturer, 0, 560 sizeof(dev->info.manufacturer)); 561 os_memcpy(dev->info.manufacturer, msg->manufacturer, 562 msg->manufacturer_len); 563 } 564 565 if (msg->model_name && 566 msg->model_name_len < sizeof(dev->info.model_name)) { 567 os_memset(dev->info.model_name, 0, 568 sizeof(dev->info.model_name)); 569 os_memcpy(dev->info.model_name, msg->model_name, 570 msg->model_name_len); 571 } 572 573 if (msg->model_number && 574 msg->model_number_len < sizeof(dev->info.model_number)) { 575 os_memset(dev->info.model_number, 0, 576 sizeof(dev->info.model_number)); 577 os_memcpy(dev->info.model_number, msg->model_number, 578 msg->model_number_len); 579 } 580 581 if (msg->serial_number && 582 msg->serial_number_len < sizeof(dev->info.serial_number)) { 583 os_memset(dev->info.serial_number, 0, 584 sizeof(dev->info.serial_number)); 585 os_memcpy(dev->info.serial_number, msg->serial_number, 586 msg->serial_number_len); 587 } 588 589 if (msg->pri_dev_type) 590 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type, 591 sizeof(dev->info.pri_dev_type)); 592 else if (msg->wps_pri_dev_type) 593 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type, 594 sizeof(dev->info.pri_dev_type)); 595 596 if (msg->wps_sec_dev_type_list) { 597 os_memcpy(dev->info.wps_sec_dev_type_list, 598 msg->wps_sec_dev_type_list, 599 msg->wps_sec_dev_type_list_len); 600 dev->info.wps_sec_dev_type_list_len = 601 msg->wps_sec_dev_type_list_len; 602 } 603 604 if (msg->capability) { 605 /* 606 * P2P Client Discoverability bit is reserved in all frames 607 * that use this function, so do not change its value here. 608 */ 609 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 610 dev->info.dev_capab |= msg->capability[0] & 611 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 612 dev->info.group_capab = msg->capability[1]; 613 } 614 615 if (msg->ext_listen_timing) { 616 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing); 617 dev->ext_listen_interval = 618 WPA_GET_LE16(msg->ext_listen_timing + 2); 619 } 620 621 if (!probe_req) { 622 u16 new_config_methods; 623 new_config_methods = msg->config_methods ? 624 msg->config_methods : msg->wps_config_methods; 625 if (new_config_methods && 626 dev->info.config_methods != new_config_methods) { 627 wpa_printf(MSG_DEBUG, "P2P: Update peer " MACSTR 628 " config_methods 0x%x -> 0x%x", 629 MAC2STR(dev->info.p2p_device_addr), 630 dev->info.config_methods, 631 new_config_methods); 632 dev->info.config_methods = new_config_methods; 633 } 634 } 635} 636 637 638/** 639 * p2p_add_device - Add peer entries based on scan results or P2P frames 640 * @p2p: P2P module context from p2p_init() 641 * @addr: Source address of Beacon or Probe Response frame (may be either 642 * P2P Device Address or P2P Interface Address) 643 * @level: Signal level (signal strength of the received frame from the peer) 644 * @freq: Frequency on which the Beacon or Probe Response frame was received 645 * @rx_time: Time when the result was received 646 * @ies: IEs from the Beacon or Probe Response frame 647 * @ies_len: Length of ies buffer in octets 648 * @scan_res: Whether this was based on scan results 649 * Returns: 0 on success, -1 on failure 650 * 651 * If the scan result is for a GO, the clients in the group will also be added 652 * to the peer table. This function can also be used with some other frames 653 * like Provision Discovery Request that contains P2P Capability and P2P Device 654 * Info attributes. 655 */ 656int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq, 657 struct os_time *rx_time, int level, const u8 *ies, 658 size_t ies_len, int scan_res) 659{ 660 struct p2p_device *dev; 661 struct p2p_message msg; 662 const u8 *p2p_dev_addr; 663 int i; 664 struct os_time time_now; 665 666 os_memset(&msg, 0, sizeof(msg)); 667 if (p2p_parse_ies(ies, ies_len, &msg)) { 668 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 669 "P2P: Failed to parse P2P IE for a device entry"); 670 p2p_parse_free(&msg); 671 return -1; 672 } 673 674 if (msg.p2p_device_addr) 675 p2p_dev_addr = msg.p2p_device_addr; 676 else if (msg.device_id) 677 p2p_dev_addr = msg.device_id; 678 else { 679 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 680 "P2P: Ignore scan data without P2P Device Info or " 681 "P2P Device Id"); 682 p2p_parse_free(&msg); 683 return -1; 684 } 685 686 if (!is_zero_ether_addr(p2p->peer_filter) && 687 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) { 688 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Do not add peer " 689 "filter for " MACSTR " due to peer filter", 690 MAC2STR(p2p_dev_addr)); 691 p2p_parse_free(&msg); 692 return 0; 693 } 694 695 dev = p2p_create_device(p2p, p2p_dev_addr); 696 if (dev == NULL) { 697 p2p_parse_free(&msg); 698 return -1; 699 } 700 701 if (rx_time == NULL) { 702 os_get_time(&time_now); 703 rx_time = &time_now; 704 } 705 706 /* 707 * Update the device entry only if the new peer 708 * entry is newer than the one previously stored. 709 */ 710 if (dev->last_seen.sec > 0 && 711 os_time_before(rx_time, &dev->last_seen)) { 712 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Do not update peer " 713 "entry based on old frame (rx_time=%u.%06u " 714 "last_seen=%u.%06u)", 715 (unsigned int) rx_time->sec, 716 (unsigned int) rx_time->usec, 717 (unsigned int) dev->last_seen.sec, 718 (unsigned int) dev->last_seen.usec); 719 p2p_parse_free(&msg); 720 return -1; 721 } 722 723 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_time)); 724 725 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 726 727 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0) 728 os_memcpy(dev->interface_addr, addr, ETH_ALEN); 729 if (msg.ssid && 730 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 731 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 732 != 0)) { 733 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]); 734 dev->oper_ssid_len = msg.ssid[1]; 735 } 736 737 if (freq >= 2412 && freq <= 2484 && msg.ds_params && 738 *msg.ds_params >= 1 && *msg.ds_params <= 14) { 739 int ds_freq; 740 if (*msg.ds_params == 14) 741 ds_freq = 2484; 742 else 743 ds_freq = 2407 + *msg.ds_params * 5; 744 if (freq != ds_freq) { 745 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 746 "P2P: Update Listen frequency based on DS " 747 "Parameter Set IE: %d -> %d MHz", 748 freq, ds_freq); 749 freq = ds_freq; 750 } 751 } 752 753 if (dev->listen_freq && dev->listen_freq != freq && scan_res) { 754 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 755 "P2P: Update Listen frequency based on scan " 756 "results (" MACSTR " %d -> %d MHz (DS param %d)", 757 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq, 758 freq, msg.ds_params ? *msg.ds_params : -1); 759 } 760 if (scan_res) { 761 dev->listen_freq = freq; 762 if (msg.group_info) 763 dev->oper_freq = freq; 764 } 765 dev->info.level = level; 766 767 p2p_copy_wps_info(dev, 0, &msg); 768 769 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 770 wpabuf_free(dev->info.wps_vendor_ext[i]); 771 dev->info.wps_vendor_ext[i] = NULL; 772 } 773 774 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 775 if (msg.wps_vendor_ext[i] == NULL) 776 break; 777 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy( 778 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]); 779 if (dev->info.wps_vendor_ext[i] == NULL) 780 break; 781 } 782 783 if (msg.wfd_subelems) { 784 wpabuf_free(dev->info.wfd_subelems); 785 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 786 } 787 788 if (scan_res) { 789 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq, 790 msg.group_info, msg.group_info_len); 791 } 792 793 p2p_parse_free(&msg); 794 795 if (p2p_pending_sd_req(p2p, dev)) 796 dev->flags |= P2P_DEV_SD_SCHEDULE; 797 798 if (dev->flags & P2P_DEV_REPORTED) 799 return 0; 800 801 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 802 "P2P: Peer found with Listen frequency %d MHz " 803 "(rx_time=%u.%06u)", freq, (unsigned int) rx_time->sec, 804 (unsigned int) rx_time->usec); 805 if (dev->flags & P2P_DEV_USER_REJECTED) { 806 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 807 "P2P: Do not report rejected device"); 808 return 0; 809 } 810 811 if (dev->info.config_methods == 0 && 812 (freq == 2412 || freq == 2437 || freq == 2462)) { 813 /* 814 * If we have only seen a Beacon frame from a GO, we do not yet 815 * know what WPS config methods it supports. Since some 816 * applications use config_methods value from P2P-DEVICE-FOUND 817 * events, postpone reporting this peer until we've fully 818 * discovered its capabilities. 819 * 820 * At least for now, do this only if the peer was detected on 821 * one of the social channels since that peer can be easily be 822 * found again and there are no limitations of having to use 823 * passive scan on this channels, so this can be done through 824 * Probe Response frame that includes the config_methods 825 * information. 826 */ 827 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 828 "P2P: Do not report peer " MACSTR " with unknown " 829 "config methods", MAC2STR(addr)); 830 return 0; 831 } 832 833 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 834 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 835 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 836 837 return 0; 838} 839 840 841static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev) 842{ 843 int i; 844 845 if (p2p->go_neg_peer == dev) { 846 /* 847 * If GO Negotiation is in progress, report that it has failed. 848 */ 849 p2p_go_neg_failed(p2p, dev, -1); 850 p2p->go_neg_peer = NULL; 851 } 852 if (p2p->invite_peer == dev) 853 p2p->invite_peer = NULL; 854 if (p2p->sd_peer == dev) 855 p2p->sd_peer = NULL; 856 if (p2p->pending_client_disc_go == dev) 857 p2p->pending_client_disc_go = NULL; 858 859 /* dev_lost() device, but only if it was previously dev_found() */ 860 if (dev->flags & P2P_DEV_REPORTED_ONCE) 861 p2p->cfg->dev_lost(p2p->cfg->cb_ctx, 862 dev->info.p2p_device_addr); 863 864 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 865 wpabuf_free(dev->info.wps_vendor_ext[i]); 866 dev->info.wps_vendor_ext[i] = NULL; 867 } 868 869 wpabuf_free(dev->info.wfd_subelems); 870 871 os_free(dev); 872} 873 874 875static int p2p_get_next_prog_freq(struct p2p_data *p2p) 876{ 877 struct p2p_channels *c; 878 struct p2p_reg_class *cla; 879 size_t cl, ch; 880 int found = 0; 881 u8 reg_class; 882 u8 channel; 883 int freq; 884 885 c = &p2p->cfg->channels; 886 for (cl = 0; cl < c->reg_classes; cl++) { 887 cla = &c->reg_class[cl]; 888 if (cla->reg_class != p2p->last_prog_scan_class) 889 continue; 890 for (ch = 0; ch < cla->channels; ch++) { 891 if (cla->channel[ch] == p2p->last_prog_scan_chan) { 892 found = 1; 893 break; 894 } 895 } 896 if (found) 897 break; 898 } 899 900 if (!found) { 901 /* Start from beginning */ 902 reg_class = c->reg_class[0].reg_class; 903 channel = c->reg_class[0].channel[0]; 904 } else { 905 /* Pick the next channel */ 906 ch++; 907 if (ch == cla->channels) { 908 cl++; 909 if (cl == c->reg_classes) 910 cl = 0; 911 ch = 0; 912 } 913 reg_class = c->reg_class[cl].reg_class; 914 channel = c->reg_class[cl].channel[ch]; 915 } 916 917 freq = p2p_channel_to_freq(p2p->cfg->country, reg_class, channel); 918 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Next progressive search " 919 "channel: reg_class %u channel %u -> %d MHz", 920 reg_class, channel, freq); 921 p2p->last_prog_scan_class = reg_class; 922 p2p->last_prog_scan_chan = channel; 923 924 if (freq == 2412 || freq == 2437 || freq == 2462) 925 return 0; /* No need to add social channels */ 926 return freq; 927} 928 929 930static void p2p_search(struct p2p_data *p2p) 931{ 932 int freq = 0; 933 enum p2p_scan_type type; 934 u16 pw_id = DEV_PW_DEFAULT; 935 int res; 936 937 if (p2p->drv_in_listen) { 938 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Driver is still " 939 "in Listen state - wait for it to end before " 940 "continuing"); 941 return; 942 } 943 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 944 945 if (p2p->find_type == P2P_FIND_PROGRESSIVE && 946 (freq = p2p_get_next_prog_freq(p2p)) > 0) { 947 type = P2P_SCAN_SOCIAL_PLUS_ONE; 948 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting search " 949 "(+ freq %u)", freq); 950 } else { 951 type = P2P_SCAN_SOCIAL; 952 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting search"); 953 } 954 955 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq, 956 p2p->num_req_dev_types, p2p->req_dev_types, 957 p2p->find_dev_id, pw_id); 958 if (res < 0) { 959 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 960 "P2P: Scan request failed"); 961 p2p_continue_find(p2p); 962 } else if (res == 1) { 963 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Could not start " 964 "p2p_scan at this point - will try again after " 965 "previous scan completes"); 966 p2p_set_state(p2p, P2P_CONTINUE_SEARCH_WHEN_READY); 967 } else { 968 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Running p2p_scan"); 969 p2p->p2p_scan_running = 1; 970 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 971 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 972 p2p, NULL); 973 } 974} 975 976 977static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx) 978{ 979 struct p2p_data *p2p = eloop_ctx; 980 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Find timeout -> stop"); 981 p2p_stop_find(p2p); 982} 983 984 985static int p2p_run_after_scan(struct p2p_data *p2p) 986{ 987 struct p2p_device *dev; 988 enum p2p_after_scan op; 989 990 if (p2p->after_scan_tx) { 991 p2p->after_scan_tx_in_progress = 1; 992 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Send pending " 993 "Action frame at p2p_scan completion"); 994 p2p->cfg->send_action(p2p->cfg->cb_ctx, 995 p2p->after_scan_tx->freq, 996 p2p->after_scan_tx->dst, 997 p2p->after_scan_tx->src, 998 p2p->after_scan_tx->bssid, 999 (u8 *) (p2p->after_scan_tx + 1), 1000 p2p->after_scan_tx->len, 1001 p2p->after_scan_tx->wait_time); 1002 os_free(p2p->after_scan_tx); 1003 p2p->after_scan_tx = NULL; 1004#ifdef ANDROID_P2P 1005 /* For SD frames, there is a scenario, where we can receive a SD request frame during p2p_scan. 1006 * At that moment, we will send the SD response from this context. After sending the SD response, 1007 * we need to continue p2p_find. But if we return 1 from here, p2p_find is going to be stopped. 1008 */ 1009 return 0; 1010#else 1011 return 1; 1012#endif 1013 } 1014 1015 op = p2p->start_after_scan; 1016 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1017 switch (op) { 1018 case P2P_AFTER_SCAN_NOTHING: 1019 break; 1020 case P2P_AFTER_SCAN_LISTEN: 1021 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Start previously " 1022 "requested Listen state"); 1023 p2p_listen(p2p, p2p->pending_listen_sec * 1000 + 1024 p2p->pending_listen_usec / 1000); 1025 return 1; 1026 case P2P_AFTER_SCAN_CONNECT: 1027 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Start previously " 1028 "requested connect with " MACSTR, 1029 MAC2STR(p2p->after_scan_peer)); 1030 dev = p2p_get_device(p2p, p2p->after_scan_peer); 1031 if (dev == NULL) { 1032 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer not " 1033 "known anymore"); 1034 break; 1035 } 1036 p2p_connect_send(p2p, dev); 1037 return 1; 1038 } 1039 1040 return 0; 1041} 1042 1043 1044static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx) 1045{ 1046 struct p2p_data *p2p = eloop_ctx; 1047 int running; 1048 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan timeout " 1049 "(running=%d)", p2p->p2p_scan_running); 1050 running = p2p->p2p_scan_running; 1051 /* Make sure we recover from missed scan results callback */ 1052 p2p->p2p_scan_running = 0; 1053 1054 if (running) 1055 p2p_run_after_scan(p2p); 1056} 1057 1058 1059static void p2p_free_req_dev_types(struct p2p_data *p2p) 1060{ 1061 p2p->num_req_dev_types = 0; 1062 os_free(p2p->req_dev_types); 1063 p2p->req_dev_types = NULL; 1064} 1065 1066 1067int p2p_find(struct p2p_data *p2p, unsigned int timeout, 1068 enum p2p_discovery_type type, 1069 unsigned int num_req_dev_types, const u8 *req_dev_types, 1070 const u8 *dev_id, unsigned int search_delay) 1071{ 1072 int res; 1073 1074 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting find (type=%d)", 1075 type); 1076 os_get_time(&p2p->find_start); 1077 if (p2p->p2p_scan_running) { 1078 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan is " 1079 "already running"); 1080 } 1081 1082 p2p_free_req_dev_types(p2p); 1083 if (req_dev_types && num_req_dev_types) { 1084 p2p->req_dev_types = os_malloc(num_req_dev_types * 1085 WPS_DEV_TYPE_LEN); 1086 if (p2p->req_dev_types == NULL) 1087 return -1; 1088 os_memcpy(p2p->req_dev_types, req_dev_types, 1089 num_req_dev_types * WPS_DEV_TYPE_LEN); 1090 p2p->num_req_dev_types = num_req_dev_types; 1091 } 1092 1093 if (dev_id) { 1094 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN); 1095 p2p->find_dev_id = p2p->find_dev_id_buf; 1096 } else 1097 p2p->find_dev_id = NULL; 1098 1099 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1100 p2p_clear_timeout(p2p); 1101 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1102 p2p->find_type = type; 1103 p2p_device_clear_reported(p2p); 1104 p2p_set_state(p2p, P2P_SEARCH); 1105 p2p->search_delay = search_delay; 1106 p2p->in_search_delay = 0; 1107 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1108 p2p->last_p2p_find_timeout = timeout; 1109 if (timeout) 1110 eloop_register_timeout(timeout, 0, p2p_find_timeout, 1111 p2p, NULL); 1112 switch (type) { 1113 case P2P_FIND_START_WITH_FULL: 1114 case P2P_FIND_PROGRESSIVE: 1115 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0, 1116 p2p->num_req_dev_types, 1117 p2p->req_dev_types, dev_id, 1118 DEV_PW_DEFAULT); 1119 break; 1120 case P2P_FIND_ONLY_SOCIAL: 1121 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0, 1122 p2p->num_req_dev_types, 1123 p2p->req_dev_types, dev_id, 1124 DEV_PW_DEFAULT); 1125 break; 1126 default: 1127 return -1; 1128 } 1129 1130 if (res == 0) { 1131 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Running p2p_scan"); 1132 p2p->p2p_scan_running = 1; 1133 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 1134 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 1135 p2p, NULL); 1136 } else if (res == 1) { 1137 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Could not start " 1138 "p2p_scan at this point - will try again after " 1139 "previous scan completes"); 1140 res = 0; 1141 p2p_set_state(p2p, P2P_SEARCH_WHEN_READY); 1142 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1143 } else { 1144 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Failed to start " 1145 "p2p_scan"); 1146 p2p_set_state(p2p, P2P_IDLE); 1147 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1148 } 1149 1150 return res; 1151} 1152 1153#ifdef ANDROID_P2P 1154int p2p_search_pending(struct p2p_data *p2p) 1155{ 1156 if(p2p == NULL) 1157 return 0; 1158 1159 if(p2p->state == P2P_SEARCH_WHEN_READY) 1160 return 1; 1161 1162 return 0; 1163} 1164#endif 1165 1166int p2p_other_scan_completed(struct p2p_data *p2p) 1167{ 1168 if (p2p->state == P2P_CONTINUE_SEARCH_WHEN_READY) { 1169 p2p_set_state(p2p, P2P_SEARCH); 1170 p2p_search(p2p); 1171 return 1; 1172 } 1173 if (p2p->state != P2P_SEARCH_WHEN_READY) 1174 return 0; 1175 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting pending P2P find " 1176 "now that previous scan was completed"); 1177 if (p2p_find(p2p, p2p->last_p2p_find_timeout, p2p->find_type, 1178 p2p->num_req_dev_types, p2p->req_dev_types, 1179 p2p->find_dev_id, p2p->search_delay) < 0) { 1180 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, P2P_EVENT_FIND_STOPPED); 1181 return 0; 1182 } 1183 return 1; 1184} 1185 1186 1187void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq) 1188{ 1189 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Stopping find"); 1190 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1191 p2p_clear_timeout(p2p); 1192 if (p2p->state == P2P_SEARCH || 1193 p2p->state == P2P_CONTINUE_SEARCH_WHEN_READY || 1194 p2p->state == P2P_SEARCH_WHEN_READY) 1195 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, P2P_EVENT_FIND_STOPPED); 1196 p2p_set_state(p2p, P2P_IDLE); 1197 p2p_free_req_dev_types(p2p); 1198 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1199 if (p2p->go_neg_peer) 1200 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1201 p2p->go_neg_peer = NULL; 1202 p2p->sd_peer = NULL; 1203 p2p->invite_peer = NULL; 1204 p2p_stop_listen_for_freq(p2p, freq); 1205} 1206 1207 1208void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq) 1209{ 1210 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) { 1211 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Skip stop_listen " 1212 "since we are on correct channel for response"); 1213 return; 1214 } 1215 if (p2p->in_listen) { 1216 p2p->in_listen = 0; 1217 p2p_clear_timeout(p2p); 1218 } 1219 if (p2p->drv_in_listen) { 1220 /* 1221 * The driver may not deliver callback to p2p_listen_end() 1222 * when the operation gets canceled, so clear the internal 1223 * variable that is tracking driver state. 1224 */ 1225 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Clear " 1226 "drv_in_listen (%d)", p2p->drv_in_listen); 1227 p2p->drv_in_listen = 0; 1228 } 1229 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1230} 1231 1232 1233void p2p_stop_find(struct p2p_data *p2p) 1234{ 1235 p2p_stop_find_for_freq(p2p, 0); 1236} 1237 1238 1239static int p2p_prepare_channel_pref(struct p2p_data *p2p, 1240 unsigned int force_freq, 1241 unsigned int pref_freq) 1242{ 1243 u8 op_class, op_channel; 1244 unsigned int freq = force_freq ? force_freq : pref_freq; 1245 1246 if (p2p_freq_to_channel(p2p->cfg->country, freq, 1247 &op_class, &op_channel) < 0) { 1248 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1249 "P2P: Unsupported frequency %u MHz", freq); 1250 return -1; 1251 } 1252 1253 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel)) { 1254 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1255 "P2P: Frequency %u MHz (oper_class %u channel %u) not " 1256 "allowed for P2P", freq, op_class, op_channel); 1257 return -1; 1258 } 1259 1260 p2p->op_reg_class = op_class; 1261 p2p->op_channel = op_channel; 1262 1263 if (force_freq) { 1264 p2p->channels.reg_classes = 1; 1265 p2p->channels.reg_class[0].channels = 1; 1266 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 1267 p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 1268 } else { 1269 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1270 sizeof(struct p2p_channels)); 1271 } 1272 1273 return 0; 1274} 1275 1276 1277static void p2p_prepare_channel_best(struct p2p_data *p2p) 1278{ 1279 u8 op_class, op_channel; 1280 1281 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 && 1282 p2p_supported_freq(p2p, p2p->best_freq_overall) && 1283 p2p_freq_to_channel(p2p->cfg->country, p2p->best_freq_overall, 1284 &op_class, &op_channel) == 0) { 1285 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Select best " 1286 "overall channel as operating channel preference"); 1287 p2p->op_reg_class = op_class; 1288 p2p->op_channel = op_channel; 1289 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 && 1290 p2p_supported_freq(p2p, p2p->best_freq_5) && 1291 p2p_freq_to_channel(p2p->cfg->country, p2p->best_freq_5, 1292 &op_class, &op_channel) == 0) { 1293 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Select best 5 GHz " 1294 "channel as operating channel preference"); 1295 p2p->op_reg_class = op_class; 1296 p2p->op_channel = op_channel; 1297 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 && 1298 p2p_supported_freq(p2p, p2p->best_freq_24) && 1299 p2p_freq_to_channel(p2p->cfg->country, p2p->best_freq_24, 1300 &op_class, &op_channel) == 0) { 1301 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Select best 2.4 " 1302 "GHz channel as operating channel preference"); 1303 p2p->op_reg_class = op_class; 1304 p2p->op_channel = op_channel; 1305 } else { 1306 p2p->op_reg_class = p2p->cfg->op_reg_class; 1307 p2p->op_channel = p2p->cfg->op_channel; 1308 } 1309 1310 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1311 sizeof(struct p2p_channels)); 1312} 1313 1314 1315/** 1316 * p2p_prepare_channel - Select operating channel for GO Negotiation 1317 * @p2p: P2P module context from p2p_init() 1318 * @dev: Selected peer device 1319 * @force_freq: Forced frequency in MHz or 0 if not forced 1320 * @pref_freq: Preferred frequency in MHz or 0 if no preference 1321 * Returns: 0 on success, -1 on failure (channel not supported for P2P) 1322 * 1323 * This function is used to do initial operating channel selection for GO 1324 * Negotiation prior to having received peer information. The selected channel 1325 * may be further optimized in p2p_reselect_channel() once the peer information 1326 * is available. 1327 */ 1328int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev, 1329 unsigned int force_freq, unsigned int pref_freq) 1330{ 1331 if (force_freq || pref_freq) { 1332 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq) < 0) 1333 return -1; 1334 } else { 1335 p2p_prepare_channel_best(p2p); 1336 } 1337 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1338 "P2P: Own preference for operation channel: " 1339 "Operating Class %u Channel %u%s", 1340 p2p->op_reg_class, p2p->op_channel, 1341 force_freq ? " (forced)" : ""); 1342 1343 if (force_freq) 1344 dev->flags |= P2P_DEV_FORCE_FREQ; 1345 else 1346 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1347 1348 return 0; 1349} 1350 1351 1352static void p2p_set_dev_persistent(struct p2p_device *dev, 1353 int persistent_group) 1354{ 1355 switch (persistent_group) { 1356 case 0: 1357 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP | 1358 P2P_DEV_PREFER_PERSISTENT_RECONN); 1359 break; 1360 case 1: 1361 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP; 1362 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN; 1363 break; 1364 case 2: 1365 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP | 1366 P2P_DEV_PREFER_PERSISTENT_RECONN; 1367 break; 1368 } 1369} 1370 1371 1372int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr, 1373 enum p2p_wps_method wps_method, 1374 int go_intent, const u8 *own_interface_addr, 1375 unsigned int force_freq, int persistent_group, 1376 const u8 *force_ssid, size_t force_ssid_len, 1377 int pd_before_go_neg, unsigned int pref_freq) 1378{ 1379 struct p2p_device *dev; 1380 1381 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1382 "P2P: Request to start group negotiation - peer=" MACSTR 1383 " GO Intent=%d Intended Interface Address=" MACSTR 1384 " wps_method=%d persistent_group=%d pd_before_go_neg=%d", 1385 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1386 wps_method, persistent_group, pd_before_go_neg); 1387 1388 dev = p2p_get_device(p2p, peer_addr); 1389 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 1390 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1391 "P2P: Cannot connect to unknown P2P Device " MACSTR, 1392 MAC2STR(peer_addr)); 1393 return -1; 1394 } 1395 1396 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq) < 0) 1397 return -1; 1398 1399 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 1400 if (!(dev->info.dev_capab & 1401 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 1402 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1403 "P2P: Cannot connect to P2P Device " MACSTR 1404 " that is in a group and is not discoverable", 1405 MAC2STR(peer_addr)); 1406 return -1; 1407 } 1408 if (dev->oper_freq <= 0) { 1409 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1410 "P2P: Cannot connect to P2P Device " MACSTR 1411 " with incomplete information", 1412 MAC2STR(peer_addr)); 1413 return -1; 1414 } 1415 1416 /* 1417 * First, try to connect directly. If the peer does not 1418 * acknowledge frames, assume it is sleeping and use device 1419 * discoverability via the GO at that point. 1420 */ 1421 } 1422 1423 p2p->ssid_set = 0; 1424 if (force_ssid) { 1425 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1426 force_ssid, force_ssid_len); 1427 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1428 p2p->ssid_len = force_ssid_len; 1429 p2p->ssid_set = 1; 1430 } 1431 1432 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1433 dev->flags &= ~P2P_DEV_USER_REJECTED; 1434 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 1435 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1436 if (pd_before_go_neg) 1437 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG; 1438 else { 1439 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG; 1440 /* 1441 * Assign dialog token and tie breaker here to use the same 1442 * values in each retry within the same GO Negotiation exchange. 1443 */ 1444 dev->dialog_token++; 1445 if (dev->dialog_token == 0) 1446 dev->dialog_token = 1; 1447 dev->tie_breaker = p2p->next_tie_breaker; 1448 p2p->next_tie_breaker = !p2p->next_tie_breaker; 1449 } 1450 dev->connect_reqs = 0; 1451 dev->go_neg_req_sent = 0; 1452 dev->go_state = UNKNOWN_GO; 1453 p2p_set_dev_persistent(dev, persistent_group); 1454 p2p->go_intent = go_intent; 1455 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1456 1457 if (p2p->state != P2P_IDLE) 1458 p2p_stop_find(p2p); 1459 1460 if (p2p->after_scan_tx) { 1461 /* 1462 * We need to drop the pending frame to avoid issues with the 1463 * new GO Negotiation, e.g., when the pending frame was from a 1464 * previous attempt at starting a GO Negotiation. 1465 */ 1466 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Dropped " 1467 "previous pending Action frame TX that was waiting " 1468 "for p2p_scan completion"); 1469 os_free(p2p->after_scan_tx); 1470 p2p->after_scan_tx = NULL; 1471 } 1472 1473 dev->wps_method = wps_method; 1474 dev->status = P2P_SC_SUCCESS; 1475 1476 if (p2p->p2p_scan_running) { 1477 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1478 "P2P: p2p_scan running - delay connect send"); 1479 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT; 1480 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN); 1481 return 0; 1482 } 1483 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1484 1485 return p2p_connect_send(p2p, dev); 1486} 1487 1488 1489int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr, 1490 enum p2p_wps_method wps_method, 1491 int go_intent, const u8 *own_interface_addr, 1492 unsigned int force_freq, int persistent_group, 1493 const u8 *force_ssid, size_t force_ssid_len, 1494 unsigned int pref_freq) 1495{ 1496 struct p2p_device *dev; 1497 1498 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1499 "P2P: Request to authorize group negotiation - peer=" MACSTR 1500 " GO Intent=%d Intended Interface Address=" MACSTR 1501 " wps_method=%d persistent_group=%d", 1502 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1503 wps_method, persistent_group); 1504 1505 dev = p2p_get_device(p2p, peer_addr); 1506 if (dev == NULL) { 1507 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1508 "P2P: Cannot authorize unknown P2P Device " MACSTR, 1509 MAC2STR(peer_addr)); 1510 return -1; 1511 } 1512 1513 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq) < 0) 1514 return -1; 1515 1516 p2p->ssid_set = 0; 1517 if (force_ssid) { 1518 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1519 force_ssid, force_ssid_len); 1520 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1521 p2p->ssid_len = force_ssid_len; 1522 p2p->ssid_set = 1; 1523 } 1524 1525 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1526 dev->flags &= ~P2P_DEV_USER_REJECTED; 1527 dev->go_neg_req_sent = 0; 1528 dev->go_state = UNKNOWN_GO; 1529 p2p_set_dev_persistent(dev, persistent_group); 1530 p2p->go_intent = go_intent; 1531 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1532 1533 dev->wps_method = wps_method; 1534 dev->status = P2P_SC_SUCCESS; 1535 1536 return 0; 1537} 1538 1539 1540void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr, 1541 struct p2p_device *dev, struct p2p_message *msg) 1542{ 1543 os_get_time(&dev->last_seen); 1544 1545 p2p_copy_wps_info(dev, 0, msg); 1546 1547 if (msg->listen_channel) { 1548 int freq; 1549 freq = p2p_channel_to_freq((char *) msg->listen_channel, 1550 msg->listen_channel[3], 1551 msg->listen_channel[4]); 1552 if (freq < 0) { 1553 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1554 "P2P: Unknown peer Listen channel: " 1555 "country=%c%c(0x%02x) reg_class=%u channel=%u", 1556 msg->listen_channel[0], 1557 msg->listen_channel[1], 1558 msg->listen_channel[2], 1559 msg->listen_channel[3], 1560 msg->listen_channel[4]); 1561 } else { 1562 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Update " 1563 "peer " MACSTR " Listen channel: %u -> %u MHz", 1564 MAC2STR(dev->info.p2p_device_addr), 1565 dev->listen_freq, freq); 1566 dev->listen_freq = freq; 1567 } 1568 } 1569 1570 if (msg->wfd_subelems) { 1571 wpabuf_free(dev->info.wfd_subelems); 1572 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems); 1573 } 1574 1575 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 1576 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 1577 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1578 "P2P: Completed device entry based on data from " 1579 "GO Negotiation Request"); 1580 } else { 1581 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1582 "P2P: Created device entry based on GO Neg Req: " 1583 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' " 1584 "listen_freq=%d", 1585 MAC2STR(dev->info.p2p_device_addr), 1586 dev->info.dev_capab, dev->info.group_capab, 1587 dev->info.device_name, dev->listen_freq); 1588 } 1589 1590 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY; 1591 1592 if (dev->flags & P2P_DEV_USER_REJECTED) { 1593 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1594 "P2P: Do not report rejected device"); 1595 return; 1596 } 1597 1598 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 1599 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 1600 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 1601} 1602 1603 1604void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len) 1605{ 1606 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 1607 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2); 1608 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2], 1609 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len); 1610 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len; 1611} 1612 1613 1614int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params) 1615{ 1616 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len); 1617 p2p_random(params->passphrase, 8); 1618 return 0; 1619} 1620 1621 1622void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer) 1623{ 1624 struct p2p_go_neg_results res; 1625 int go = peer->go_state == LOCAL_GO; 1626 struct p2p_channels intersection; 1627 int freqs; 1628 size_t i, j; 1629 1630 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1631 "P2P: GO Negotiation with " MACSTR " completed (%s will be " 1632 "GO)", MAC2STR(peer->info.p2p_device_addr), 1633 go ? "local end" : "peer"); 1634 1635 os_memset(&res, 0, sizeof(res)); 1636 res.role_go = go; 1637 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 1638 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 1639 res.wps_method = peer->wps_method; 1640 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 1641 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 1642 res.persistent_group = 2; 1643 else 1644 res.persistent_group = 1; 1645 } 1646 1647 if (go) { 1648 /* Setup AP mode for WPS provisioning */ 1649 res.freq = p2p_channel_to_freq(p2p->cfg->country, 1650 p2p->op_reg_class, 1651 p2p->op_channel); 1652 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1653 res.ssid_len = p2p->ssid_len; 1654 p2p_random(res.passphrase, 8); 1655 } else { 1656 res.freq = peer->oper_freq; 1657 if (p2p->ssid_len) { 1658 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1659 res.ssid_len = p2p->ssid_len; 1660 } 1661 } 1662 1663 p2p_channels_intersect(&p2p->channels, &peer->channels, 1664 &intersection); 1665 freqs = 0; 1666 for (i = 0; i < intersection.reg_classes; i++) { 1667 struct p2p_reg_class *c = &intersection.reg_class[i]; 1668 if (freqs + 1 == P2P_MAX_CHANNELS) 1669 break; 1670 for (j = 0; j < c->channels; j++) { 1671 int freq; 1672 if (freqs + 1 == P2P_MAX_CHANNELS) 1673 break; 1674 freq = p2p_channel_to_freq(peer->country, c->reg_class, 1675 c->channel[j]); 1676 if (freq < 0) 1677 continue; 1678 res.freq_list[freqs++] = freq; 1679 } 1680 } 1681 1682 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout; 1683 1684 p2p_clear_timeout(p2p); 1685 p2p->ssid_set = 0; 1686 peer->go_neg_req_sent = 0; 1687 peer->wps_method = WPS_NOT_READY; 1688 1689 p2p_set_state(p2p, P2P_PROVISIONING); 1690 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 1691} 1692 1693 1694static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa, 1695 const u8 *data, size_t len, int rx_freq) 1696{ 1697 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1698 "P2P: RX P2P Public Action from " MACSTR, MAC2STR(sa)); 1699 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len); 1700 1701 if (len < 1) 1702 return; 1703 1704 switch (data[0]) { 1705 case P2P_GO_NEG_REQ: 1706 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq); 1707 break; 1708 case P2P_GO_NEG_RESP: 1709 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq); 1710 break; 1711 case P2P_GO_NEG_CONF: 1712 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1); 1713 break; 1714 case P2P_INVITATION_REQ: 1715 p2p_process_invitation_req(p2p, sa, data + 1, len - 1, 1716 rx_freq); 1717 break; 1718 case P2P_INVITATION_RESP: 1719 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1); 1720 break; 1721 case P2P_PROV_DISC_REQ: 1722 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1723 break; 1724 case P2P_PROV_DISC_RESP: 1725 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1); 1726 break; 1727 case P2P_DEV_DISC_REQ: 1728 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1729 break; 1730 case P2P_DEV_DISC_RESP: 1731 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1); 1732 break; 1733 default: 1734 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1735 "P2P: Unsupported P2P Public Action frame type %d", 1736 data[0]); 1737 break; 1738 } 1739} 1740 1741 1742static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, 1743 const u8 *sa, const u8 *bssid, const u8 *data, 1744 size_t len, int freq) 1745{ 1746 if (len < 1) 1747 return; 1748 1749 switch (data[0]) { 1750 case WLAN_PA_VENDOR_SPECIFIC: 1751 data++; 1752 len--; 1753 if (len < 3) 1754 return; 1755 if (WPA_GET_BE24(data) != OUI_WFA) 1756 return; 1757 1758 data += 3; 1759 len -= 3; 1760 if (len < 1) 1761 return; 1762 1763 if (*data != P2P_OUI_TYPE) 1764 return; 1765 1766 p2p_rx_p2p_action(p2p, sa, data + 1, len - 1, freq); 1767 break; 1768 case WLAN_PA_GAS_INITIAL_REQ: 1769 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq); 1770 break; 1771 case WLAN_PA_GAS_INITIAL_RESP: 1772 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq); 1773 break; 1774 case WLAN_PA_GAS_COMEBACK_REQ: 1775 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq); 1776 break; 1777 case WLAN_PA_GAS_COMEBACK_RESP: 1778 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq); 1779 break; 1780 } 1781} 1782 1783 1784void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa, 1785 const u8 *bssid, u8 category, 1786 const u8 *data, size_t len, int freq) 1787{ 1788 if (category == WLAN_ACTION_PUBLIC) { 1789 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq); 1790 return; 1791 } 1792 1793 if (category != WLAN_ACTION_VENDOR_SPECIFIC) 1794 return; 1795 1796 if (len < 4) 1797 return; 1798 1799 if (WPA_GET_BE24(data) != OUI_WFA) 1800 return; 1801 data += 3; 1802 len -= 3; 1803 1804 if (*data != P2P_OUI_TYPE) 1805 return; 1806 data++; 1807 len--; 1808 1809 /* P2P action frame */ 1810 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1811 "P2P: RX P2P Action from " MACSTR, MAC2STR(sa)); 1812 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len); 1813 1814 if (len < 1) 1815 return; 1816 switch (data[0]) { 1817 case P2P_NOA: 1818 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1819 "P2P: Received P2P Action - Notice of Absence"); 1820 /* TODO */ 1821 break; 1822 case P2P_PRESENCE_REQ: 1823 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq); 1824 break; 1825 case P2P_PRESENCE_RESP: 1826 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1); 1827 break; 1828 case P2P_GO_DISC_REQ: 1829 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq); 1830 break; 1831 default: 1832 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1833 "P2P: Received P2P Action - unknown type %u", data[0]); 1834 break; 1835 } 1836} 1837 1838 1839static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx) 1840{ 1841 struct p2p_data *p2p = eloop_ctx; 1842 if (p2p->go_neg_peer == NULL) 1843 return; 1844 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1845 p2p->go_neg_peer->status = P2P_SC_SUCCESS; 1846 p2p_connect_send(p2p, p2p->go_neg_peer); 1847} 1848 1849 1850static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx) 1851{ 1852 struct p2p_data *p2p = eloop_ctx; 1853 if (p2p->invite_peer == NULL) 1854 return; 1855 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1856 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr); 1857} 1858 1859 1860static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr, 1861 const u8 *ie, size_t ie_len) 1862{ 1863 struct p2p_message msg; 1864 struct p2p_device *dev; 1865 1866 os_memset(&msg, 0, sizeof(msg)); 1867 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL) 1868 { 1869 p2p_parse_free(&msg); 1870 return; /* not a P2P probe */ 1871 } 1872 1873 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 1874 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 1875 != 0) { 1876 /* The Probe Request is not part of P2P Device Discovery. It is 1877 * not known whether the source address of the frame is the P2P 1878 * Device Address or P2P Interface Address. Do not add a new 1879 * peer entry based on this frames. 1880 */ 1881 p2p_parse_free(&msg); 1882 return; 1883 } 1884 1885 dev = p2p_get_device(p2p, addr); 1886 if (dev) { 1887 if (dev->country[0] == 0 && msg.listen_channel) 1888 os_memcpy(dev->country, msg.listen_channel, 3); 1889 os_get_time(&dev->last_seen); 1890 p2p_parse_free(&msg); 1891 return; /* already known */ 1892 } 1893 1894 dev = p2p_create_device(p2p, addr); 1895 if (dev == NULL) { 1896 p2p_parse_free(&msg); 1897 return; 1898 } 1899 1900 os_get_time(&dev->last_seen); 1901 dev->flags |= P2P_DEV_PROBE_REQ_ONLY; 1902 1903 if (msg.listen_channel) { 1904 os_memcpy(dev->country, msg.listen_channel, 3); 1905 dev->listen_freq = p2p_channel_to_freq(dev->country, 1906 msg.listen_channel[3], 1907 msg.listen_channel[4]); 1908 } 1909 1910 p2p_copy_wps_info(dev, 1, &msg); 1911 1912 if (msg.wfd_subelems) { 1913 wpabuf_free(dev->info.wfd_subelems); 1914 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 1915 } 1916 1917 p2p_parse_free(&msg); 1918 1919 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1920 "P2P: Created device entry based on Probe Req: " MACSTR 1921 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d", 1922 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab, 1923 dev->info.group_capab, dev->info.device_name, 1924 dev->listen_freq); 1925} 1926 1927 1928struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p, 1929 const u8 *addr, 1930 struct p2p_message *msg) 1931{ 1932 struct p2p_device *dev; 1933 1934 dev = p2p_get_device(p2p, addr); 1935 if (dev) { 1936 os_get_time(&dev->last_seen); 1937 return dev; /* already known */ 1938 } 1939 1940 dev = p2p_create_device(p2p, addr); 1941 if (dev == NULL) 1942 return NULL; 1943 1944 p2p_add_dev_info(p2p, addr, dev, msg); 1945 1946 return dev; 1947} 1948 1949 1950static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type) 1951{ 1952 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0) 1953 return 1; 1954 if (os_memcmp(dev_type, req_dev_type, 2) == 0 && 1955 WPA_GET_BE32(&req_dev_type[2]) == 0 && 1956 WPA_GET_BE16(&req_dev_type[6]) == 0) 1957 return 1; /* Category match with wildcard OUI/sub-category */ 1958 return 0; 1959} 1960 1961 1962int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[], 1963 size_t num_req_dev_type) 1964{ 1965 size_t i; 1966 for (i = 0; i < num_req_dev_type; i++) { 1967 if (dev_type_match(dev_type, req_dev_type[i])) 1968 return 1; 1969 } 1970 return 0; 1971} 1972 1973 1974/** 1975 * p2p_match_dev_type - Match local device type with requested type 1976 * @p2p: P2P module context from p2p_init() 1977 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) 1978 * Returns: 1 on match, 0 on mismatch 1979 * 1980 * This function can be used to match the Requested Device Type attribute in 1981 * WPS IE with the local device types for deciding whether to reply to a Probe 1982 * Request frame. 1983 */ 1984int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps) 1985{ 1986 struct wps_parse_attr attr; 1987 size_t i; 1988 1989 if (wps_parse_msg(wps, &attr)) 1990 return 1; /* assume no Requested Device Type attributes */ 1991 1992 if (attr.num_req_dev_type == 0) 1993 return 1; /* no Requested Device Type attributes -> match */ 1994 1995 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type, 1996 attr.num_req_dev_type)) 1997 return 1; /* Own Primary Device Type matches */ 1998 1999 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) 2000 if (dev_type_list_match(p2p->cfg->sec_dev_type[i], 2001 attr.req_dev_type, 2002 attr.num_req_dev_type)) 2003 return 1; /* Own Secondary Device Type matches */ 2004 2005 /* No matching device type found */ 2006 return 0; 2007} 2008 2009 2010struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p) 2011{ 2012 struct wpabuf *buf; 2013 u8 *len; 2014 int pw_id = -1; 2015 size_t extra = 0; 2016 2017#ifdef CONFIG_WIFI_DISPLAY 2018 if (p2p->wfd_ie_probe_resp) 2019 extra = wpabuf_len(p2p->wfd_ie_probe_resp); 2020#endif /* CONFIG_WIFI_DISPLAY */ 2021 2022 buf = wpabuf_alloc(1000 + extra); 2023 if (buf == NULL) 2024 return NULL; 2025 2026 if (p2p->go_neg_peer) { 2027 /* Advertise immediate availability of WPS credential */ 2028 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method); 2029 } 2030 2031 p2p_build_wps_ie(p2p, buf, pw_id, 1); 2032 2033#ifdef CONFIG_WIFI_DISPLAY 2034 if (p2p->wfd_ie_probe_resp) 2035 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp); 2036#endif /* CONFIG_WIFI_DISPLAY */ 2037 2038 /* P2P IE */ 2039 len = p2p_buf_add_ie_hdr(buf); 2040 p2p_buf_add_capability(buf, p2p->dev_capab & 2041 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2042 if (p2p->ext_listen_interval) 2043 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 2044 p2p->ext_listen_interval); 2045 p2p_buf_add_device_info(buf, p2p, NULL); 2046 p2p_buf_update_ie_hdr(buf, len); 2047 2048 return buf; 2049} 2050 2051 2052static int is_11b(u8 rate) 2053{ 2054 return rate == 0x02 || rate == 0x04 || rate == 0x0b || rate == 0x16; 2055} 2056 2057 2058static int supp_rates_11b_only(struct ieee802_11_elems *elems) 2059{ 2060 int num_11b = 0, num_others = 0; 2061 int i; 2062 2063 if (elems->supp_rates == NULL && elems->ext_supp_rates == NULL) 2064 return 0; 2065 2066 for (i = 0; elems->supp_rates && i < elems->supp_rates_len; i++) { 2067 if (is_11b(elems->supp_rates[i])) 2068 num_11b++; 2069 else 2070 num_others++; 2071 } 2072 2073 for (i = 0; elems->ext_supp_rates && i < elems->ext_supp_rates_len; 2074 i++) { 2075 if (is_11b(elems->ext_supp_rates[i])) 2076 num_11b++; 2077 else 2078 num_others++; 2079 } 2080 2081 return num_11b > 0 && num_others == 0; 2082} 2083 2084 2085static enum p2p_probe_req_status 2086p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2087 const u8 *bssid, const u8 *ie, size_t ie_len) 2088{ 2089 struct ieee802_11_elems elems; 2090 struct wpabuf *buf; 2091 struct ieee80211_mgmt *resp; 2092 struct p2p_message msg; 2093 struct wpabuf *ies; 2094 2095 if (!p2p->in_listen || !p2p->drv_in_listen) { 2096 /* not in Listen state - ignore Probe Request */ 2097 return P2P_PREQ_NOT_LISTEN; 2098 } 2099 2100 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) == 2101 ParseFailed) { 2102 /* Ignore invalid Probe Request frames */ 2103 return P2P_PREQ_MALFORMED; 2104 } 2105 2106 if (elems.p2p == NULL) { 2107 /* not a P2P probe - ignore it */ 2108 return P2P_PREQ_NOT_P2P; 2109 } 2110 2111 if (dst && !is_broadcast_ether_addr(dst) && 2112 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2113 /* Not sent to the broadcast address or our P2P Device Address 2114 */ 2115 return P2P_PREQ_NOT_PROCESSED; 2116 } 2117 2118 if (bssid && !is_broadcast_ether_addr(bssid)) { 2119 /* Not sent to the Wildcard BSSID */ 2120 return P2P_PREQ_NOT_PROCESSED; 2121 } 2122 2123 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN || 2124 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) != 2125 0) { 2126 /* not using P2P Wildcard SSID - ignore */ 2127 return P2P_PREQ_NOT_PROCESSED; 2128 } 2129 2130 if (supp_rates_11b_only(&elems)) { 2131 /* Indicates support for 11b rates only */ 2132 return P2P_PREQ_NOT_P2P; 2133 } 2134 2135 os_memset(&msg, 0, sizeof(msg)); 2136 if (p2p_parse_ies(ie, ie_len, &msg) < 0) { 2137 /* Could not parse P2P attributes */ 2138 return P2P_PREQ_NOT_P2P; 2139 } 2140 2141 if (msg.device_id && 2142 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2143 /* Device ID did not match */ 2144 p2p_parse_free(&msg); 2145 return P2P_PREQ_NOT_PROCESSED; 2146 } 2147 2148 /* Check Requested Device Type match */ 2149 if (msg.wps_attributes && 2150 !p2p_match_dev_type(p2p, msg.wps_attributes)) { 2151 /* No match with Requested Device Type */ 2152 p2p_parse_free(&msg); 2153 return P2P_PREQ_NOT_PROCESSED; 2154 } 2155 p2p_parse_free(&msg); 2156 2157 if (!p2p->cfg->send_probe_resp) { 2158 /* Response generated elsewhere */ 2159 return P2P_PREQ_NOT_PROCESSED; 2160 } 2161 2162 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2163 "P2P: Reply to P2P Probe Request in Listen state"); 2164 2165 /* 2166 * We do not really have a specific BSS that this frame is advertising, 2167 * so build a frame that has some information in valid format. This is 2168 * really only used for discovery purposes, not to learn exact BSS 2169 * parameters. 2170 */ 2171 ies = p2p_build_probe_resp_ies(p2p); 2172 if (ies == NULL) 2173 return P2P_PREQ_NOT_PROCESSED; 2174 2175 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 2176 if (buf == NULL) { 2177 wpabuf_free(ies); 2178 return P2P_PREQ_NOT_PROCESSED; 2179 } 2180 2181 resp = NULL; 2182 resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp); 2183 2184 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 2185 (WLAN_FC_STYPE_PROBE_RESP << 4)); 2186 os_memcpy(resp->da, addr, ETH_ALEN); 2187 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN); 2188 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN); 2189 resp->u.probe_resp.beacon_int = host_to_le16(100); 2190 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 2191 resp->u.probe_resp.capab_info = 2192 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE | 2193 WLAN_CAPABILITY_PRIVACY | 2194 WLAN_CAPABILITY_SHORT_SLOT_TIME); 2195 2196 wpabuf_put_u8(buf, WLAN_EID_SSID); 2197 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN); 2198 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 2199 2200 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES); 2201 wpabuf_put_u8(buf, 8); 2202 wpabuf_put_u8(buf, (60 / 5) | 0x80); 2203 wpabuf_put_u8(buf, 90 / 5); 2204 wpabuf_put_u8(buf, (120 / 5) | 0x80); 2205 wpabuf_put_u8(buf, 180 / 5); 2206 wpabuf_put_u8(buf, (240 / 5) | 0x80); 2207 wpabuf_put_u8(buf, 360 / 5); 2208 wpabuf_put_u8(buf, 480 / 5); 2209 wpabuf_put_u8(buf, 540 / 5); 2210 2211 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS); 2212 wpabuf_put_u8(buf, 1); 2213 wpabuf_put_u8(buf, p2p->cfg->channel); 2214 2215 wpabuf_put_buf(buf, ies); 2216 wpabuf_free(ies); 2217 2218 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf); 2219 2220 wpabuf_free(buf); 2221 2222 return P2P_PREQ_NOT_PROCESSED; 2223} 2224 2225 2226enum p2p_probe_req_status 2227p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2228 const u8 *bssid, const u8 *ie, size_t ie_len) 2229{ 2230 enum p2p_probe_req_status res; 2231 2232 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len); 2233 2234 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len); 2235 2236 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) && 2237 p2p->go_neg_peer && 2238 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN) 2239 == 0 && 2240 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 2241 /* Received a Probe Request from GO Negotiation peer */ 2242 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2243 "P2P: Found GO Negotiation peer - try to start GO " 2244 "negotiation from timeout"); 2245 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2246 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL); 2247 return P2P_PREQ_PROCESSED; 2248 } 2249 2250 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) && 2251 p2p->invite_peer && 2252 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN) 2253 == 0) { 2254 /* Received a Probe Request from Invite peer */ 2255 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2256 "P2P: Found Invite peer - try to start Invite from " 2257 "timeout"); 2258 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL); 2259 return P2P_PREQ_PROCESSED; 2260 } 2261 2262 return res; 2263} 2264 2265 2266static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid, 2267 u8 *buf, size_t len, struct wpabuf *p2p_ie) 2268{ 2269 struct wpabuf *tmp; 2270 u8 *lpos; 2271 size_t tmplen; 2272 int res; 2273 u8 group_capab; 2274 2275 if (p2p_ie == NULL) 2276 return 0; /* WLAN AP is not a P2P manager */ 2277 2278 /* 2279 * (Re)Association Request - P2P IE 2280 * P2P Capability attribute (shall be present) 2281 * P2P Interface attribute (present if concurrent device and 2282 * P2P Management is enabled) 2283 */ 2284 tmp = wpabuf_alloc(200); 2285 if (tmp == NULL) 2286 return -1; 2287 2288 lpos = p2p_buf_add_ie_hdr(tmp); 2289 group_capab = 0; 2290 if (p2p->num_groups > 0) { 2291 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; 2292 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2293 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) && 2294 p2p->cross_connect) 2295 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 2296 } 2297 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab); 2298 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2299 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED)) 2300 p2p_buf_add_p2p_interface(tmp, p2p); 2301 p2p_buf_update_ie_hdr(tmp, lpos); 2302 2303 tmplen = wpabuf_len(tmp); 2304 if (tmplen > len) 2305 res = -1; 2306 else { 2307 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2308 res = tmplen; 2309 } 2310 wpabuf_free(tmp); 2311 2312 return res; 2313} 2314 2315 2316int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf, 2317 size_t len, int p2p_group, struct wpabuf *p2p_ie) 2318{ 2319 struct wpabuf *tmp; 2320 u8 *lpos; 2321 struct p2p_device *peer; 2322 size_t tmplen; 2323 int res; 2324 size_t extra = 0; 2325 2326 if (!p2p_group) 2327 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie); 2328 2329#ifdef CONFIG_WIFI_DISPLAY 2330 if (p2p->wfd_ie_assoc_req) 2331 extra = wpabuf_len(p2p->wfd_ie_assoc_req); 2332#endif /* CONFIG_WIFI_DISPLAY */ 2333 2334 /* 2335 * (Re)Association Request - P2P IE 2336 * P2P Capability attribute (shall be present) 2337 * Extended Listen Timing (may be present) 2338 * P2P Device Info attribute (shall be present) 2339 */ 2340 tmp = wpabuf_alloc(200 + extra); 2341 if (tmp == NULL) 2342 return -1; 2343 2344#ifdef CONFIG_WIFI_DISPLAY 2345 if (p2p->wfd_ie_assoc_req) 2346 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req); 2347#endif /* CONFIG_WIFI_DISPLAY */ 2348 2349 peer = bssid ? p2p_get_device(p2p, bssid) : NULL; 2350 2351 lpos = p2p_buf_add_ie_hdr(tmp); 2352 p2p_buf_add_capability(tmp, p2p->dev_capab, 0); 2353 if (p2p->ext_listen_interval) 2354 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period, 2355 p2p->ext_listen_interval); 2356 p2p_buf_add_device_info(tmp, p2p, peer); 2357 p2p_buf_update_ie_hdr(tmp, lpos); 2358 2359 tmplen = wpabuf_len(tmp); 2360 if (tmplen > len) 2361 res = -1; 2362 else { 2363 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2364 res = tmplen; 2365 } 2366 wpabuf_free(tmp); 2367 2368 return res; 2369} 2370 2371 2372int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) 2373{ 2374 struct wpabuf *p2p_ie; 2375 int ret; 2376 2377 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); 2378 if (p2p_ie == NULL) 2379 return 0; 2380 2381 ret = p2p_attr_text(p2p_ie, buf, end); 2382 wpabuf_free(p2p_ie); 2383 return ret; 2384} 2385 2386 2387int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr) 2388{ 2389 struct p2p_message msg; 2390 2391 os_memset(&msg, 0, sizeof(msg)); 2392 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 2393 return -1; 2394 2395 if (msg.p2p_device_addr) { 2396 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); 2397 return 0; 2398 } else if (msg.device_id) { 2399 os_memcpy(dev_addr, msg.device_id, ETH_ALEN); 2400 return 0; 2401 } 2402 return -1; 2403} 2404 2405 2406int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr) 2407{ 2408 struct wpabuf *p2p_ie; 2409 int ret; 2410 2411 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 2412 P2P_IE_VENDOR_TYPE); 2413 if (p2p_ie == NULL) 2414 return -1; 2415 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr); 2416 wpabuf_free(p2p_ie); 2417 return ret; 2418} 2419 2420 2421static void p2p_clear_go_neg(struct p2p_data *p2p) 2422{ 2423 p2p->go_neg_peer = NULL; 2424 p2p_clear_timeout(p2p); 2425 p2p_set_state(p2p, P2P_IDLE); 2426} 2427 2428 2429void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr) 2430{ 2431 if (p2p->go_neg_peer == NULL) { 2432 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2433 "P2P: No pending Group Formation - " 2434 "ignore WPS registration success notification"); 2435 return; /* No pending Group Formation */ 2436 } 2437 2438 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) != 2439 0) { 2440 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2441 "P2P: Ignore WPS registration success notification " 2442 "for " MACSTR " (GO Negotiation peer " MACSTR ")", 2443 MAC2STR(mac_addr), 2444 MAC2STR(p2p->go_neg_peer->intended_addr)); 2445 return; /* Ignore unexpected peer address */ 2446 } 2447 2448 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2449 "P2P: Group Formation completed successfully with " MACSTR, 2450 MAC2STR(mac_addr)); 2451 2452 p2p_clear_go_neg(p2p); 2453} 2454 2455 2456void p2p_group_formation_failed(struct p2p_data *p2p) 2457{ 2458 if (p2p->go_neg_peer == NULL) { 2459 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2460 "P2P: No pending Group Formation - " 2461 "ignore group formation failure notification"); 2462 return; /* No pending Group Formation */ 2463 } 2464 2465 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2466 "P2P: Group Formation failed with " MACSTR, 2467 MAC2STR(p2p->go_neg_peer->intended_addr)); 2468 2469 p2p_clear_go_neg(p2p); 2470} 2471 2472 2473struct p2p_data * p2p_init(const struct p2p_config *cfg) 2474{ 2475 struct p2p_data *p2p; 2476 2477 if (cfg->max_peers < 1) 2478 return NULL; 2479 2480 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg)); 2481 if (p2p == NULL) 2482 return NULL; 2483 p2p->cfg = (struct p2p_config *) (p2p + 1); 2484 os_memcpy(p2p->cfg, cfg, sizeof(*cfg)); 2485 if (cfg->dev_name) 2486 p2p->cfg->dev_name = os_strdup(cfg->dev_name); 2487 if (cfg->manufacturer) 2488 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer); 2489 if (cfg->model_name) 2490 p2p->cfg->model_name = os_strdup(cfg->model_name); 2491 if (cfg->model_number) 2492 p2p->cfg->model_number = os_strdup(cfg->model_number); 2493 if (cfg->serial_number) 2494 p2p->cfg->serial_number = os_strdup(cfg->serial_number); 2495 if (cfg->pref_chan) { 2496 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan * 2497 sizeof(struct p2p_channel)); 2498 if (p2p->cfg->pref_chan) { 2499 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan, 2500 cfg->num_pref_chan * 2501 sizeof(struct p2p_channel)); 2502 } else 2503 p2p->cfg->num_pref_chan = 0; 2504 } 2505 2506#ifdef ANDROID_P2P 2507 /* 100ms listen time is too less to receive the response frames in some scenarios 2508 * increasing min listen time to 200ms. 2509 */ 2510 p2p->min_disc_int = 2; 2511 /* SD_FAIR_POLICY: Initializing the SD current serviced pointer to NULL */ 2512 p2p->sd_dev_list = NULL; 2513#else 2514 p2p->min_disc_int = 1; 2515#endif 2516 p2p->max_disc_int = 3; 2517 p2p->max_disc_tu = -1; 2518 2519 os_get_random(&p2p->next_tie_breaker, 1); 2520 p2p->next_tie_breaker &= 0x01; 2521 if (cfg->sd_request) 2522 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 2523 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE; 2524 if (cfg->concurrent_operations) 2525 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER; 2526 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 2527 2528 dl_list_init(&p2p->devices); 2529 2530 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 2531 p2p_expiration_timeout, p2p, NULL); 2532 2533 p2p->go_timeout = 100; 2534 p2p->client_timeout = 20; 2535 2536 return p2p; 2537} 2538 2539 2540void p2p_deinit(struct p2p_data *p2p) 2541{ 2542#ifdef CONFIG_WIFI_DISPLAY 2543 wpabuf_free(p2p->wfd_ie_beacon); 2544 wpabuf_free(p2p->wfd_ie_probe_req); 2545 wpabuf_free(p2p->wfd_ie_probe_resp); 2546 wpabuf_free(p2p->wfd_ie_assoc_req); 2547 wpabuf_free(p2p->wfd_ie_invitation); 2548 wpabuf_free(p2p->wfd_ie_prov_disc_req); 2549 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 2550 wpabuf_free(p2p->wfd_ie_go_neg); 2551 wpabuf_free(p2p->wfd_dev_info); 2552 wpabuf_free(p2p->wfd_assoc_bssid); 2553 wpabuf_free(p2p->wfd_coupled_sink_info); 2554#endif /* CONFIG_WIFI_DISPLAY */ 2555 2556 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL); 2557 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 2558 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2559 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2560 p2p_flush(p2p); 2561 p2p_free_req_dev_types(p2p); 2562 os_free(p2p->cfg->dev_name); 2563 os_free(p2p->cfg->manufacturer); 2564 os_free(p2p->cfg->model_name); 2565 os_free(p2p->cfg->model_number); 2566 os_free(p2p->cfg->serial_number); 2567 os_free(p2p->cfg->pref_chan); 2568 os_free(p2p->groups); 2569 wpabuf_free(p2p->sd_resp); 2570 os_free(p2p->after_scan_tx); 2571 p2p_remove_wps_vendor_extensions(p2p); 2572 os_free(p2p); 2573} 2574 2575 2576void p2p_flush(struct p2p_data *p2p) 2577{ 2578 struct p2p_device *dev, *prev; 2579 p2p_stop_find(p2p); 2580 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device, 2581 list) { 2582 dl_list_del(&dev->list); 2583 p2p_device_free(p2p, dev); 2584 } 2585#ifdef ANDROID_P2P 2586 /* SD_FAIR_POLICY: Initializing the SD current serviced pointer to NULL */ 2587 p2p->sd_dev_list = NULL; 2588#endif 2589 p2p_free_sd_queries(p2p); 2590 os_free(p2p->after_scan_tx); 2591 p2p->after_scan_tx = NULL; 2592} 2593 2594 2595int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr) 2596{ 2597 struct p2p_device *dev; 2598 2599 dev = p2p_get_device(p2p, addr); 2600 if (dev == NULL) 2601 return -1; 2602 2603 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Unauthorizing " MACSTR, 2604 MAC2STR(addr)); 2605 2606 if (p2p->go_neg_peer == dev) 2607 p2p->go_neg_peer = NULL; 2608 2609 dev->wps_method = WPS_NOT_READY; 2610 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 2611 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 2612 2613 /* Check if after_scan_tx is for this peer. If so free it */ 2614 if (p2p->after_scan_tx && 2615 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) { 2616 os_free(p2p->after_scan_tx); 2617 p2p->after_scan_tx = NULL; 2618 } 2619 2620 return 0; 2621} 2622 2623 2624int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name) 2625{ 2626 os_free(p2p->cfg->dev_name); 2627 if (dev_name) { 2628 p2p->cfg->dev_name = os_strdup(dev_name); 2629 if (p2p->cfg->dev_name == NULL) 2630 return -1; 2631 } else 2632 p2p->cfg->dev_name = NULL; 2633 return 0; 2634} 2635 2636 2637int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer) 2638{ 2639 os_free(p2p->cfg->manufacturer); 2640 p2p->cfg->manufacturer = NULL; 2641 if (manufacturer) { 2642 p2p->cfg->manufacturer = os_strdup(manufacturer); 2643 if (p2p->cfg->manufacturer == NULL) 2644 return -1; 2645 } 2646 2647 return 0; 2648} 2649 2650 2651int p2p_set_model_name(struct p2p_data *p2p, const char *model_name) 2652{ 2653 os_free(p2p->cfg->model_name); 2654 p2p->cfg->model_name = NULL; 2655 if (model_name) { 2656 p2p->cfg->model_name = os_strdup(model_name); 2657 if (p2p->cfg->model_name == NULL) 2658 return -1; 2659 } 2660 2661 return 0; 2662} 2663 2664 2665int p2p_set_model_number(struct p2p_data *p2p, const char *model_number) 2666{ 2667 os_free(p2p->cfg->model_number); 2668 p2p->cfg->model_number = NULL; 2669 if (model_number) { 2670 p2p->cfg->model_number = os_strdup(model_number); 2671 if (p2p->cfg->model_number == NULL) 2672 return -1; 2673 } 2674 2675 return 0; 2676} 2677 2678 2679int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number) 2680{ 2681 os_free(p2p->cfg->serial_number); 2682 p2p->cfg->serial_number = NULL; 2683 if (serial_number) { 2684 p2p->cfg->serial_number = os_strdup(serial_number); 2685 if (p2p->cfg->serial_number == NULL) 2686 return -1; 2687 } 2688 2689 return 0; 2690} 2691 2692 2693void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods) 2694{ 2695 p2p->cfg->config_methods = config_methods; 2696} 2697 2698 2699void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid) 2700{ 2701 os_memcpy(p2p->cfg->uuid, uuid, 16); 2702} 2703 2704 2705int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type) 2706{ 2707 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8); 2708 return 0; 2709} 2710 2711 2712int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8], 2713 size_t num_dev_types) 2714{ 2715 if (num_dev_types > P2P_SEC_DEVICE_TYPES) 2716 num_dev_types = P2P_SEC_DEVICE_TYPES; 2717 p2p->cfg->num_sec_dev_types = num_dev_types; 2718 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8); 2719 return 0; 2720} 2721 2722 2723void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p) 2724{ 2725 int i; 2726 2727 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2728 wpabuf_free(p2p->wps_vendor_ext[i]); 2729 p2p->wps_vendor_ext[i] = NULL; 2730 } 2731} 2732 2733 2734int p2p_add_wps_vendor_extension(struct p2p_data *p2p, 2735 const struct wpabuf *vendor_ext) 2736{ 2737 int i; 2738 2739 if (vendor_ext == NULL) 2740 return -1; 2741 2742 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2743 if (p2p->wps_vendor_ext[i] == NULL) 2744 break; 2745 } 2746 if (i >= P2P_MAX_WPS_VENDOR_EXT) 2747 return -1; 2748 2749 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext); 2750 if (p2p->wps_vendor_ext[i] == NULL) 2751 return -1; 2752 2753 return 0; 2754} 2755 2756 2757int p2p_set_country(struct p2p_data *p2p, const char *country) 2758{ 2759 os_memcpy(p2p->cfg->country, country, 3); 2760 return 0; 2761} 2762 2763 2764void p2p_continue_find(struct p2p_data *p2p) 2765{ 2766 struct p2p_device *dev; 2767#ifdef ANDROID_P2P 2768 int skip=1; 2769#endif 2770 p2p_set_state(p2p, P2P_SEARCH); 2771 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2772#ifdef ANDROID_P2P 2773 /* SD_FAIR_POLICY: We need to give chance to all devices in the device list 2774 * There may be a scenario, where a particular peer device have 2775 * not registered any query response. When we send a SD request to such device, 2776 * no response will be received. And if we continue to get probe responses from that device, 2777 * and if that device happens to be on top in our device list, 2778 * we will always continue to send SD requests always to that peer only. 2779 * We will not be able to send SD requests to other devices in that case. 2780 * This implementation keeps track of last serviced peer device. 2781 * And then takes the next one from the device list, in the next iteration. 2782 */ 2783 if (p2p->sd_dev_list && p2p->sd_dev_list != &p2p->devices) { 2784 if(skip) { 2785 if ((&dev->list == p2p->sd_dev_list) ) { 2786 skip = 0; 2787 if (dev->list.next == &p2p->devices) 2788 p2p->sd_dev_list = NULL; 2789 } 2790 continue; 2791 } 2792 } 2793 p2p->sd_dev_list = &dev->list; 2794 wpa_printf(MSG_DEBUG, "P2P: ### Servicing %p dev->flags 0x%x SD schedule %s devaddr " MACSTR, 2795 p2p->sd_dev_list, dev->flags, dev->flags & P2P_DEV_SD_SCHEDULE ? "TRUE": "FALSE", 2796 MAC2STR(dev->info.p2p_device_addr)); 2797#endif 2798 if (dev->flags & P2P_DEV_SD_SCHEDULE) { 2799 if (p2p_start_sd(p2p, dev) == 0) 2800 return; 2801 else 2802 break; 2803 } else if (dev->req_config_methods && 2804 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) { 2805 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Send " 2806 "pending Provision Discovery Request to " 2807 MACSTR " (config methods 0x%x)", 2808 MAC2STR(dev->info.p2p_device_addr), 2809 dev->req_config_methods); 2810 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0) 2811 return; 2812 } 2813 } 2814 2815 p2p_listen_in_find(p2p, 1); 2816} 2817 2818 2819static void p2p_sd_cb(struct p2p_data *p2p, int success) 2820{ 2821 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2822 "P2P: Service Discovery Query TX callback: success=%d", 2823 success); 2824 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2825 2826 if (!success) { 2827 if (p2p->sd_peer) { 2828 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE; 2829 p2p->sd_peer = NULL; 2830 } 2831 p2p_continue_find(p2p); 2832 return; 2833 } 2834 2835 if (p2p->sd_peer == NULL) { 2836 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2837 "P2P: No SD peer entry known"); 2838 p2p_continue_find(p2p); 2839 return; 2840 } 2841 2842 /* Wait for response from the peer */ 2843 p2p_set_state(p2p, P2P_SD_DURING_FIND); 2844 p2p_set_timeout(p2p, 0, 200000); 2845} 2846 2847 2848/** 2849 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state 2850 * @p2p: P2P module context from p2p_init() 2851 */ 2852static void p2p_retry_pd(struct p2p_data *p2p) 2853{ 2854 struct p2p_device *dev; 2855 2856 if (p2p->state != P2P_IDLE) 2857 return; 2858 2859 /* 2860 * Retry the prov disc req attempt only for the peer that the user had 2861 * requested. 2862 */ 2863 2864 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2865 if (os_memcmp(p2p->pending_pd_devaddr, 2866 dev->info.p2p_device_addr, ETH_ALEN) != 0) 2867 continue; 2868 if (!dev->req_config_methods) 2869 continue; 2870 2871 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Send " 2872 "pending Provision Discovery Request to " 2873 MACSTR " (config methods 0x%x)", 2874 MAC2STR(dev->info.p2p_device_addr), 2875 dev->req_config_methods); 2876 p2p_send_prov_disc_req(p2p, dev, 2877 dev->flags & P2P_DEV_PD_FOR_JOIN, 0); 2878 return; 2879 } 2880} 2881 2882 2883static void p2p_prov_disc_cb(struct p2p_data *p2p, int success) 2884{ 2885 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2886 "P2P: Provision Discovery Request TX callback: success=%d", 2887 success); 2888 2889 /* 2890 * Postpone resetting the pending action state till after we actually 2891 * time out. This allows us to take some action like notifying any 2892 * interested parties about no response to the request. 2893 * 2894 * When the timer (below) goes off we check in IDLE, SEARCH, or 2895 * LISTEN_ONLY state, which are the only allowed states to issue a PD 2896 * requests in, if this was still pending and then raise notification. 2897 */ 2898 2899 if (!success) { 2900 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2901 2902 if (p2p->user_initiated_pd && 2903 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY)) 2904 { 2905 /* Retry request from timeout to avoid busy loops */ 2906 p2p->pending_action_state = P2P_PENDING_PD; 2907 p2p_set_timeout(p2p, 0, 50000); 2908 } else if (p2p->state != P2P_IDLE) 2909 p2p_continue_find(p2p); 2910 else if (p2p->user_initiated_pd) { 2911 p2p->pending_action_state = P2P_PENDING_PD; 2912#ifdef ANDROID_P2P 2913 p2p_set_timeout(p2p, 0, 350000); 2914#else 2915 p2p_set_timeout(p2p, 0, 300000); 2916#endif 2917 } 2918 return; 2919 } 2920 2921 /* 2922 * This postponing, of resetting pending_action_state, needs to be 2923 * done only for user initiated PD requests and not internal ones. 2924 */ 2925 if (p2p->user_initiated_pd) 2926 p2p->pending_action_state = P2P_PENDING_PD; 2927 else 2928 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2929 2930 /* Wait for response from the peer */ 2931 if (p2p->state == P2P_SEARCH) 2932 p2p_set_state(p2p, P2P_PD_DURING_FIND); 2933#ifdef ANDROID_P2P 2934 p2p_set_timeout(p2p, 0, 350000); 2935#else 2936 p2p_set_timeout(p2p, 0, 200000); 2937#endif 2938} 2939 2940 2941int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq, 2942 struct os_time *rx_time, int level, const u8 *ies, 2943 size_t ies_len) 2944{ 2945 if (os_time_before(rx_time, &p2p->find_start)) { 2946 /* 2947 * The driver may have cached (e.g., in cfg80211 BSS table) the 2948 * scan results for relatively long time. To avoid reporting 2949 * stale information, update P2P peers only based on results 2950 * that have based on frames received after the last p2p_find 2951 * operation was started. 2952 */ 2953 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Ignore old scan " 2954 "result for " MACSTR " (rx_time=%u.%06u)", 2955 MAC2STR(bssid), (unsigned int) rx_time->sec, 2956 (unsigned int) rx_time->usec); 2957 return 0; 2958 } 2959 2960 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1); 2961 2962 return 0; 2963} 2964 2965 2966void p2p_scan_res_handled(struct p2p_data *p2p) 2967{ 2968 if (!p2p->p2p_scan_running) { 2969 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan was not " 2970 "running, but scan results received"); 2971 } 2972 p2p->p2p_scan_running = 0; 2973 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2974 2975 if (p2p_run_after_scan(p2p)) 2976 return; 2977 if (p2p->state == P2P_SEARCH) 2978 p2p_continue_find(p2p); 2979} 2980 2981 2982void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id) 2983{ 2984 u8 *len; 2985 2986#ifdef CONFIG_WIFI_DISPLAY 2987 if (p2p->wfd_ie_probe_req) 2988 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req); 2989#endif /* CONFIG_WIFI_DISPLAY */ 2990 2991 len = p2p_buf_add_ie_hdr(ies); 2992 p2p_buf_add_capability(ies, p2p->dev_capab & 2993 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2994 if (dev_id) 2995 p2p_buf_add_device_id(ies, dev_id); 2996 if (p2p->cfg->reg_class && p2p->cfg->channel) 2997 p2p_buf_add_listen_channel(ies, p2p->cfg->country, 2998 p2p->cfg->reg_class, 2999 p2p->cfg->channel); 3000 if (p2p->ext_listen_interval) 3001 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period, 3002 p2p->ext_listen_interval); 3003 /* TODO: p2p_buf_add_operating_channel() if GO */ 3004 p2p_buf_update_ie_hdr(ies, len); 3005} 3006 3007 3008size_t p2p_scan_ie_buf_len(struct p2p_data *p2p) 3009{ 3010 size_t len = 100; 3011 3012#ifdef CONFIG_WIFI_DISPLAY 3013 if (p2p && p2p->wfd_ie_probe_req) 3014 len += wpabuf_len(p2p->wfd_ie_probe_req); 3015#endif /* CONFIG_WIFI_DISPLAY */ 3016 3017 return len; 3018} 3019 3020 3021int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end) 3022{ 3023 return p2p_attr_text(p2p_ie, buf, end); 3024} 3025 3026 3027static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success) 3028{ 3029 struct p2p_device *dev = p2p->go_neg_peer; 3030 int timeout; 3031 3032 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3033 "P2P: GO Negotiation Request TX callback: success=%d", 3034 success); 3035 3036 if (dev == NULL) { 3037 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3038 "P2P: No pending GO Negotiation"); 3039 return; 3040 } 3041 3042 if (success) { 3043 if (dev->flags & P2P_DEV_USER_REJECTED) { 3044 p2p_set_state(p2p, P2P_IDLE); 3045 return; 3046 } 3047 } else if (dev->go_neg_req_sent) { 3048 /* Cancel the increment from p2p_connect_send() on failure */ 3049 dev->go_neg_req_sent--; 3050 } 3051 3052 if (!success && 3053 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) && 3054 !is_zero_ether_addr(dev->member_in_go_dev)) { 3055 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3056 "P2P: Peer " MACSTR " did not acknowledge request - " 3057 "try to use device discoverability through its GO", 3058 MAC2STR(dev->info.p2p_device_addr)); 3059 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3060 p2p_send_dev_disc_req(p2p, dev); 3061 return; 3062 } 3063 3064 /* 3065 * Use P2P find, if needed, to find the other device from its listen 3066 * channel. 3067 */ 3068 p2p_set_state(p2p, P2P_CONNECT); 3069 timeout = success ? 500000 : 100000; 3070 if (!success && p2p->go_neg_peer && 3071 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) { 3072 unsigned int r; 3073 /* 3074 * Peer is expected to wait our response and we will skip the 3075 * listen phase. Add some randomness to the wait time here to 3076 * make it less likely to hit cases where we could end up in 3077 * sync with peer not listening. 3078 */ 3079 os_get_random((u8 *) &r, sizeof(r)); 3080 timeout += r % 100000; 3081 } 3082 p2p_set_timeout(p2p, 0, timeout); 3083} 3084 3085 3086static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success) 3087{ 3088 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3089 "P2P: GO Negotiation Response TX callback: success=%d", 3090 success); 3091 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) { 3092 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3093 "P2P: Ignore TX callback event - GO Negotiation is " 3094 "not running anymore"); 3095 return; 3096 } 3097 p2p_set_state(p2p, P2P_CONNECT); 3098 p2p_set_timeout(p2p, 0, 500000); 3099} 3100 3101 3102static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success) 3103{ 3104 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3105 "P2P: GO Negotiation Response (failure) TX callback: " 3106 "success=%d", success); 3107 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) { 3108 p2p_go_neg_failed(p2p, p2p->go_neg_peer, 3109 p2p->go_neg_peer->status); 3110 } 3111} 3112 3113 3114static void p2p_go_neg_conf_cb(struct p2p_data *p2p, 3115 enum p2p_send_action_result result) 3116{ 3117 struct p2p_device *dev; 3118 3119 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3120 "P2P: GO Negotiation Confirm TX callback: result=%d", 3121 result); 3122 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3123 if (result == P2P_SEND_ACTION_FAILED) { 3124 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3125 return; 3126 } 3127 if (result == P2P_SEND_ACTION_NO_ACK) { 3128 /* 3129 * It looks like the TX status for GO Negotiation Confirm is 3130 * often showing failure even when the peer has actually 3131 * received the frame. Since the peer may change channels 3132 * immediately after having received the frame, we may not see 3133 * an Ack for retries, so just dropping a single frame may 3134 * trigger this. To allow the group formation to succeed if the 3135 * peer did indeed receive the frame, continue regardless of 3136 * the TX status. 3137 */ 3138 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3139 "P2P: Assume GO Negotiation Confirm TX was actually " 3140 "received by the peer even though Ack was not " 3141 "reported"); 3142 } 3143 3144 dev = p2p->go_neg_peer; 3145 if (dev == NULL) 3146 return; 3147 3148 p2p_go_complete(p2p, dev); 3149} 3150 3151 3152void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 3153 const u8 *src, const u8 *bssid, 3154 enum p2p_send_action_result result) 3155{ 3156 enum p2p_pending_action_state state; 3157 int success; 3158 3159 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3160 "P2P: Action frame TX callback (state=%d freq=%u dst=" MACSTR 3161 " src=" MACSTR " bssid=" MACSTR " result=%d", 3162 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), 3163 MAC2STR(bssid), result); 3164 success = result == P2P_SEND_ACTION_SUCCESS; 3165 state = p2p->pending_action_state; 3166 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3167 switch (state) { 3168 case P2P_NO_PENDING_ACTION: 3169 if (p2p->after_scan_tx_in_progress) { 3170 p2p->after_scan_tx_in_progress = 0; 3171 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING && 3172 p2p_run_after_scan(p2p)) 3173 break; 3174 if (p2p->state == P2P_SEARCH) { 3175 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3176 "P2P: Continue find after " 3177 "after_scan_tx completion"); 3178 p2p_continue_find(p2p); 3179 } 3180 } 3181 break; 3182 case P2P_PENDING_GO_NEG_REQUEST: 3183 p2p_go_neg_req_cb(p2p, success); 3184 break; 3185 case P2P_PENDING_GO_NEG_RESPONSE: 3186 p2p_go_neg_resp_cb(p2p, success); 3187 break; 3188 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE: 3189 p2p_go_neg_resp_failure_cb(p2p, success); 3190 break; 3191 case P2P_PENDING_GO_NEG_CONFIRM: 3192 p2p_go_neg_conf_cb(p2p, result); 3193 break; 3194 case P2P_PENDING_SD: 3195 p2p_sd_cb(p2p, success); 3196 break; 3197 case P2P_PENDING_PD: 3198 p2p_prov_disc_cb(p2p, success); 3199 break; 3200 case P2P_PENDING_INVITATION_REQUEST: 3201 p2p_invitation_req_cb(p2p, success); 3202 break; 3203 case P2P_PENDING_INVITATION_RESPONSE: 3204 p2p_invitation_resp_cb(p2p, success); 3205 break; 3206 case P2P_PENDING_DEV_DISC_REQUEST: 3207 p2p_dev_disc_req_cb(p2p, success); 3208 break; 3209 case P2P_PENDING_DEV_DISC_RESPONSE: 3210 p2p_dev_disc_resp_cb(p2p, success); 3211 break; 3212 case P2P_PENDING_GO_DISC_REQ: 3213 p2p_go_disc_req_cb(p2p, success); 3214 break; 3215 } 3216 3217 p2p->after_scan_tx_in_progress = 0; 3218} 3219 3220 3221void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq, 3222 unsigned int duration) 3223{ 3224 if (freq == p2p->pending_client_disc_freq) { 3225 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3226 "P2P: Client discoverability remain-awake completed"); 3227 p2p->pending_client_disc_freq = 0; 3228 return; 3229 } 3230 3231 if (freq != p2p->pending_listen_freq) { 3232 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3233 "P2P: Unexpected listen callback for freq=%u " 3234 "duration=%u (pending_listen_freq=%u)", 3235 freq, duration, p2p->pending_listen_freq); 3236 return; 3237 } 3238 3239 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3240 "P2P: Starting Listen timeout(%u,%u) on freq=%u based on " 3241 "callback", 3242 p2p->pending_listen_sec, p2p->pending_listen_usec, 3243 p2p->pending_listen_freq); 3244 p2p->in_listen = 1; 3245 p2p->drv_in_listen = freq; 3246 if (p2p->pending_listen_sec || p2p->pending_listen_usec) { 3247 /* 3248 * Add 20 msec extra wait to avoid race condition with driver 3249 * remain-on-channel end event, i.e., give driver more time to 3250 * complete the operation before our timeout expires. 3251 */ 3252 p2p_set_timeout(p2p, p2p->pending_listen_sec, 3253 p2p->pending_listen_usec + 20000); 3254 } 3255 3256 p2p->pending_listen_freq = 0; 3257} 3258 3259 3260int p2p_listen_end(struct p2p_data *p2p, unsigned int freq) 3261{ 3262 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Driver ended Listen " 3263 "state (freq=%u)", freq); 3264 p2p->drv_in_listen = 0; 3265 if (p2p->in_listen) 3266 return 0; /* Internal timeout will trigger the next step */ 3267 3268 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) { 3269 if (p2p->go_neg_peer->connect_reqs >= 120) { 3270 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3271 "P2P: Timeout on sending GO Negotiation " 3272 "Request without getting response"); 3273 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3274 return 0; 3275 } 3276 3277 p2p_set_state(p2p, P2P_CONNECT); 3278 p2p_connect_send(p2p, p2p->go_neg_peer); 3279 return 1; 3280 } else if (p2p->state == P2P_SEARCH) { 3281 if (p2p->p2p_scan_running) { 3282 /* 3283 * Search is already in progress. This can happen if 3284 * an Action frame RX is reported immediately after 3285 * the end of a remain-on-channel operation and the 3286 * response frame to that is sent using an offchannel 3287 * operation while in p2p_find. Avoid an attempt to 3288 * restart a scan here. 3289 */ 3290 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan " 3291 "already in progress - do not try to start a " 3292 "new one"); 3293 return 1; 3294 } 3295 if (p2p->pending_listen_freq) { 3296 /* 3297 * Better wait a bit if the driver is unable to start 3298 * offchannel operation for some reason. p2p_search() 3299 * will be started from internal timeout. 3300 */ 3301 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Listen " 3302 "operation did not seem to start - delay " 3303 "search phase to avoid busy loop"); 3304 p2p_set_timeout(p2p, 0, 100000); 3305 return 1; 3306 } 3307 if (p2p->search_delay) { 3308 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Delay " 3309 "search operation by %u ms", 3310 p2p->search_delay); 3311 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3312 (p2p->search_delay % 1000) * 1000); 3313 return 1; 3314 } 3315 p2p_search(p2p); 3316 return 1; 3317 } 3318 3319 return 0; 3320} 3321 3322 3323static void p2p_timeout_connect(struct p2p_data *p2p) 3324{ 3325 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3326 if (p2p->go_neg_peer && 3327 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 3328 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Wait for GO " 3329 "Negotiation Confirm timed out - assume GO " 3330 "Negotiation failed"); 3331 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3332 return; 3333 } 3334 if (p2p->go_neg_peer && 3335 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) && 3336 p2p->go_neg_peer->connect_reqs < 120) { 3337 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer expected to " 3338 "wait our response - skip listen"); 3339 p2p_connect_send(p2p, p2p->go_neg_peer); 3340 return; 3341 } 3342 3343 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3344 p2p_listen_in_find(p2p, 0); 3345} 3346 3347 3348static void p2p_timeout_connect_listen(struct p2p_data *p2p) 3349{ 3350 if (p2p->go_neg_peer) { 3351 if (p2p->drv_in_listen) { 3352 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Driver is " 3353 "still in Listen state; wait for it to " 3354 "complete"); 3355 return; 3356 } 3357 3358 if (p2p->go_neg_peer->connect_reqs >= 120) { 3359 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3360 "P2P: Timeout on sending GO Negotiation " 3361 "Request without getting response"); 3362 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3363 return; 3364 } 3365 3366 p2p_set_state(p2p, P2P_CONNECT); 3367 p2p_connect_send(p2p, p2p->go_neg_peer); 3368 } else 3369 p2p_set_state(p2p, P2P_IDLE); 3370} 3371 3372 3373static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p) 3374{ 3375 /* 3376 * TODO: could remain constantly in Listen state for some time if there 3377 * are no other concurrent uses for the radio. For now, go to listen 3378 * state once per second to give other uses a chance to use the radio. 3379 */ 3380 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 3381 p2p_set_timeout(p2p, 0, 500000); 3382} 3383 3384 3385static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p) 3386{ 3387 struct p2p_device *dev = p2p->go_neg_peer; 3388 3389 if (dev == NULL) { 3390 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3391 "P2P: Unknown GO Neg peer - stop GO Neg wait"); 3392 return; 3393 } 3394 3395 dev->wait_count++; 3396 if (dev->wait_count >= 120) { 3397 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3398 "P2P: Timeout on waiting peer to become ready for GO " 3399 "Negotiation"); 3400 p2p_go_neg_failed(p2p, dev, -1); 3401 return; 3402 } 3403 3404 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3405 "P2P: Go to Listen state while waiting for the peer to become " 3406 "ready for GO Negotiation"); 3407 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT); 3408 p2p_listen_in_find(p2p, 0); 3409} 3410 3411 3412static void p2p_timeout_sd_during_find(struct p2p_data *p2p) 3413{ 3414 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3415 "P2P: Service Discovery Query timeout"); 3416 if (p2p->sd_peer) { 3417 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3418 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE; 3419 p2p->sd_peer = NULL; 3420 } 3421 p2p_continue_find(p2p); 3422} 3423 3424 3425static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p) 3426{ 3427 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3428 "P2P: Provision Discovery Request timeout"); 3429 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3430 p2p_continue_find(p2p); 3431} 3432 3433 3434static void p2p_timeout_prov_disc_req(struct p2p_data *p2p) 3435{ 3436 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3437 3438 /* 3439 * For user initiated PD requests that we have not gotten any responses 3440 * for while in IDLE state, we retry them a couple of times before 3441 * giving up. 3442 */ 3443 if (!p2p->user_initiated_pd) 3444 return; 3445 3446 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3447 "P2P: User initiated Provision Discovery Request timeout"); 3448 3449 if (p2p->pd_retries) { 3450 p2p->pd_retries--; 3451 p2p_retry_pd(p2p); 3452 } else { 3453 struct p2p_device *dev; 3454 int for_join = 0; 3455 3456 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3457 if (os_memcmp(p2p->pending_pd_devaddr, 3458 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3459 continue; 3460 if (dev->req_config_methods && 3461 (dev->flags & P2P_DEV_PD_FOR_JOIN)) 3462 for_join = 1; 3463 } 3464 3465 if (p2p->cfg->prov_disc_fail) 3466 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, 3467 p2p->pending_pd_devaddr, 3468 for_join ? 3469 P2P_PROV_DISC_TIMEOUT_JOIN : 3470 P2P_PROV_DISC_TIMEOUT); 3471 p2p_reset_pending_pd(p2p); 3472 } 3473} 3474 3475 3476static void p2p_timeout_invite(struct p2p_data *p2p) 3477{ 3478 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3479 p2p_set_state(p2p, P2P_INVITE_LISTEN); 3480 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 3481 /* 3482 * Better remain on operating channel instead of listen channel 3483 * when running a group. 3484 */ 3485 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Inviting in " 3486 "active GO role - wait on operating channel"); 3487 p2p_set_timeout(p2p, 0, 100000); 3488 return; 3489 } 3490 p2p_listen_in_find(p2p, 0); 3491} 3492 3493 3494static void p2p_timeout_invite_listen(struct p2p_data *p2p) 3495{ 3496 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) { 3497 p2p_set_state(p2p, P2P_INVITE); 3498 p2p_invite_send(p2p, p2p->invite_peer, 3499 p2p->invite_go_dev_addr); 3500 } else { 3501 if (p2p->invite_peer) { 3502 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3503 "P2P: Invitation Request retry limit reached"); 3504 if (p2p->cfg->invitation_result) 3505 p2p->cfg->invitation_result( 3506 p2p->cfg->cb_ctx, -1, NULL, NULL, 3507 p2p->invite_peer->info.p2p_device_addr); 3508 } 3509 p2p_set_state(p2p, P2P_IDLE); 3510 } 3511} 3512 3513 3514static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx) 3515{ 3516 struct p2p_data *p2p = eloop_ctx; 3517 3518 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Timeout (state=%s)", 3519 p2p_state_txt(p2p->state)); 3520 3521 p2p->in_listen = 0; 3522 3523 switch (p2p->state) { 3524 case P2P_IDLE: 3525 /* Check if we timed out waiting for PD req */ 3526 if (p2p->pending_action_state == P2P_PENDING_PD) 3527 p2p_timeout_prov_disc_req(p2p); 3528 break; 3529 case P2P_SEARCH: 3530 /* Check if we timed out waiting for PD req */ 3531 if (p2p->pending_action_state == P2P_PENDING_PD) 3532 p2p_timeout_prov_disc_req(p2p); 3533 if (p2p->search_delay && !p2p->in_search_delay) { 3534 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Delay " 3535 "search operation by %u ms", 3536 p2p->search_delay); 3537 p2p->in_search_delay = 1; 3538 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3539 (p2p->search_delay % 1000) * 1000); 3540 break; 3541 } 3542 p2p->in_search_delay = 0; 3543 p2p_search(p2p); 3544 break; 3545 case P2P_CONNECT: 3546 p2p_timeout_connect(p2p); 3547 break; 3548 case P2P_CONNECT_LISTEN: 3549 p2p_timeout_connect_listen(p2p); 3550 break; 3551 case P2P_GO_NEG: 3552 break; 3553 case P2P_LISTEN_ONLY: 3554 /* Check if we timed out waiting for PD req */ 3555 if (p2p->pending_action_state == P2P_PENDING_PD) 3556 p2p_timeout_prov_disc_req(p2p); 3557 3558 if (p2p->ext_listen_only) { 3559 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3560 "P2P: Extended Listen Timing - Listen State " 3561 "completed"); 3562 p2p->ext_listen_only = 0; 3563 p2p_set_state(p2p, P2P_IDLE); 3564 } 3565 break; 3566 case P2P_WAIT_PEER_CONNECT: 3567 p2p_timeout_wait_peer_connect(p2p); 3568 break; 3569 case P2P_WAIT_PEER_IDLE: 3570 p2p_timeout_wait_peer_idle(p2p); 3571 break; 3572 case P2P_SD_DURING_FIND: 3573 p2p_timeout_sd_during_find(p2p); 3574 break; 3575 case P2P_PROVISIONING: 3576 break; 3577 case P2P_PD_DURING_FIND: 3578 p2p_timeout_prov_disc_during_find(p2p); 3579 break; 3580 case P2P_INVITE: 3581 p2p_timeout_invite(p2p); 3582 break; 3583 case P2P_INVITE_LISTEN: 3584 p2p_timeout_invite_listen(p2p); 3585 break; 3586 case P2P_SEARCH_WHEN_READY: 3587 break; 3588 case P2P_CONTINUE_SEARCH_WHEN_READY: 3589 break; 3590 } 3591} 3592 3593 3594int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr) 3595{ 3596 struct p2p_device *dev; 3597 3598 dev = p2p_get_device(p2p, peer_addr); 3599 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Local request to reject " 3600 "connection attempts by peer " MACSTR, MAC2STR(peer_addr)); 3601 if (dev == NULL) { 3602 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer " MACSTR 3603 " unknown", MAC2STR(peer_addr)); 3604 return -1; 3605 } 3606 dev->status = P2P_SC_FAIL_REJECTED_BY_USER; 3607 dev->flags |= P2P_DEV_USER_REJECTED; 3608 return 0; 3609} 3610 3611 3612const char * p2p_wps_method_text(enum p2p_wps_method method) 3613{ 3614 switch (method) { 3615 case WPS_NOT_READY: 3616 return "not-ready"; 3617 case WPS_PIN_DISPLAY: 3618 return "Display"; 3619 case WPS_PIN_KEYPAD: 3620 return "Keypad"; 3621 case WPS_PBC: 3622 return "PBC"; 3623 } 3624 3625 return "??"; 3626} 3627 3628 3629static const char * p2p_go_state_text(enum p2p_go_state go_state) 3630{ 3631 switch (go_state) { 3632 case UNKNOWN_GO: 3633 return "unknown"; 3634 case LOCAL_GO: 3635 return "local"; 3636 case REMOTE_GO: 3637 return "remote"; 3638 } 3639 3640 return "??"; 3641} 3642 3643 3644const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p, 3645 const u8 *addr, int next) 3646{ 3647 struct p2p_device *dev; 3648 3649 if (addr) 3650 dev = p2p_get_device(p2p, addr); 3651 else 3652 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 3653 3654 if (dev && next) { 3655 dev = dl_list_first(&dev->list, struct p2p_device, list); 3656 if (&dev->list == &p2p->devices) 3657 dev = NULL; 3658 } 3659 3660 if (dev == NULL) 3661 return NULL; 3662 3663 return &dev->info; 3664} 3665 3666 3667int p2p_get_peer_info_txt(const struct p2p_peer_info *info, 3668 char *buf, size_t buflen) 3669{ 3670 struct p2p_device *dev; 3671 int res; 3672 char *pos, *end; 3673 struct os_time now; 3674 3675 if (info == NULL) 3676 return -1; 3677 3678 dev = (struct p2p_device *) (((u8 *) info) - 3679 offsetof(struct p2p_device, info)); 3680 3681 pos = buf; 3682 end = buf + buflen; 3683 3684 os_get_time(&now); 3685 res = os_snprintf(pos, end - pos, 3686 "age=%d\n" 3687 "listen_freq=%d\n" 3688 "wps_method=%s\n" 3689 "interface_addr=" MACSTR "\n" 3690 "member_in_go_dev=" MACSTR "\n" 3691 "member_in_go_iface=" MACSTR "\n" 3692 "go_neg_req_sent=%d\n" 3693 "go_state=%s\n" 3694 "dialog_token=%u\n" 3695 "intended_addr=" MACSTR "\n" 3696 "country=%c%c\n" 3697 "oper_freq=%d\n" 3698 "req_config_methods=0x%x\n" 3699 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n" 3700 "status=%d\n" 3701 "wait_count=%u\n" 3702 "invitation_reqs=%u\n", 3703 (int) (now.sec - dev->last_seen.sec), 3704 dev->listen_freq, 3705 p2p_wps_method_text(dev->wps_method), 3706 MAC2STR(dev->interface_addr), 3707 MAC2STR(dev->member_in_go_dev), 3708 MAC2STR(dev->member_in_go_iface), 3709 dev->go_neg_req_sent, 3710 p2p_go_state_text(dev->go_state), 3711 dev->dialog_token, 3712 MAC2STR(dev->intended_addr), 3713 dev->country[0] ? dev->country[0] : '_', 3714 dev->country[1] ? dev->country[1] : '_', 3715 dev->oper_freq, 3716 dev->req_config_methods, 3717 dev->flags & P2P_DEV_PROBE_REQ_ONLY ? 3718 "[PROBE_REQ_ONLY]" : "", 3719 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "", 3720 dev->flags & P2P_DEV_NOT_YET_READY ? 3721 "[NOT_YET_READY]" : "", 3722 dev->flags & P2P_DEV_SD_INFO ? "[SD_INFO]" : "", 3723 dev->flags & P2P_DEV_SD_SCHEDULE ? "[SD_SCHEDULE]" : 3724 "", 3725 dev->flags & P2P_DEV_PD_PEER_DISPLAY ? 3726 "[PD_PEER_DISPLAY]" : "", 3727 dev->flags & P2P_DEV_PD_PEER_KEYPAD ? 3728 "[PD_PEER_KEYPAD]" : "", 3729 dev->flags & P2P_DEV_USER_REJECTED ? 3730 "[USER_REJECTED]" : "", 3731 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ? 3732 "[PEER_WAITING_RESPONSE]" : "", 3733 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ? 3734 "[PREFER_PERSISTENT_GROUP]" : "", 3735 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ? 3736 "[WAIT_GO_NEG_RESPONSE]" : "", 3737 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ? 3738 "[WAIT_GO_NEG_CONFIRM]" : "", 3739 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ? 3740 "[GROUP_CLIENT_ONLY]" : "", 3741 dev->flags & P2P_DEV_FORCE_FREQ ? 3742 "[FORCE_FREQ]" : "", 3743 dev->flags & P2P_DEV_PD_FOR_JOIN ? 3744 "[PD_FOR_JOIN]" : "", 3745 dev->status, 3746 dev->wait_count, 3747 dev->invitation_reqs); 3748 if (res < 0 || res >= end - pos) 3749 return pos - buf; 3750 pos += res; 3751 3752 if (dev->ext_listen_period) { 3753 res = os_snprintf(pos, end - pos, 3754 "ext_listen_period=%u\n" 3755 "ext_listen_interval=%u\n", 3756 dev->ext_listen_period, 3757 dev->ext_listen_interval); 3758 if (res < 0 || res >= end - pos) 3759 return pos - buf; 3760 pos += res; 3761 } 3762 3763 if (dev->oper_ssid_len) { 3764 res = os_snprintf(pos, end - pos, 3765 "oper_ssid=%s\n", 3766 wpa_ssid_txt(dev->oper_ssid, 3767 dev->oper_ssid_len)); 3768 if (res < 0 || res >= end - pos) 3769 return pos - buf; 3770 pos += res; 3771 } 3772 3773#ifdef CONFIG_WIFI_DISPLAY 3774 if (dev->info.wfd_subelems) { 3775 res = os_snprintf(pos, end - pos, "wfd_subelems="); 3776 if (res < 0 || res >= end - pos) 3777 return pos - buf; 3778 pos += res; 3779 3780 pos += wpa_snprintf_hex(pos, end - pos, 3781 wpabuf_head(dev->info.wfd_subelems), 3782 wpabuf_len(dev->info.wfd_subelems)); 3783 3784 res = os_snprintf(pos, end - pos, "\n"); 3785 if (res < 0 || res >= end - pos) 3786 return pos - buf; 3787 pos += res; 3788 } 3789#endif /* CONFIG_WIFI_DISPLAY */ 3790 3791 return pos - buf; 3792} 3793 3794 3795int p2p_peer_known(struct p2p_data *p2p, const u8 *addr) 3796{ 3797 return p2p_get_device(p2p, addr) != NULL; 3798} 3799 3800 3801void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled) 3802{ 3803 if (enabled) { 3804 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Client " 3805 "discoverability enabled"); 3806 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3807 } else { 3808 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Client " 3809 "discoverability disabled"); 3810 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3811 } 3812} 3813 3814 3815static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1, 3816 u32 duration2, u32 interval2) 3817{ 3818 struct wpabuf *req; 3819 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL; 3820 u8 *len; 3821 3822 req = wpabuf_alloc(100); 3823 if (req == NULL) 3824 return NULL; 3825 3826 if (duration1 || interval1) { 3827 os_memset(&desc1, 0, sizeof(desc1)); 3828 desc1.count_type = 1; 3829 desc1.duration = duration1; 3830 desc1.interval = interval1; 3831 ptr1 = &desc1; 3832 3833 if (duration2 || interval2) { 3834 os_memset(&desc2, 0, sizeof(desc2)); 3835 desc2.count_type = 2; 3836 desc2.duration = duration2; 3837 desc2.interval = interval2; 3838 ptr2 = &desc2; 3839 } 3840 } 3841 3842 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1); 3843 len = p2p_buf_add_ie_hdr(req); 3844 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2); 3845 p2p_buf_update_ie_hdr(req, len); 3846 3847 return req; 3848} 3849 3850 3851int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr, 3852 const u8 *own_interface_addr, unsigned int freq, 3853 u32 duration1, u32 interval1, u32 duration2, 3854 u32 interval2) 3855{ 3856 struct wpabuf *req; 3857 3858 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Send Presence Request to " 3859 "GO " MACSTR " (own interface " MACSTR ") freq=%u dur1=%u " 3860 "int1=%u dur2=%u int2=%u", 3861 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr), 3862 freq, duration1, interval1, duration2, interval2); 3863 3864 req = p2p_build_presence_req(duration1, interval1, duration2, 3865 interval2); 3866 if (req == NULL) 3867 return -1; 3868 3869 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3870 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr, 3871 go_interface_addr, 3872 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 3873 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3874 "P2P: Failed to send Action frame"); 3875 } 3876 wpabuf_free(req); 3877 3878 return 0; 3879} 3880 3881 3882static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa, 3883 size_t noa_len, u8 dialog_token) 3884{ 3885 struct wpabuf *resp; 3886 u8 *len; 3887 3888 resp = wpabuf_alloc(100 + noa_len); 3889 if (resp == NULL) 3890 return NULL; 3891 3892 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token); 3893 len = p2p_buf_add_ie_hdr(resp); 3894 p2p_buf_add_status(resp, status); 3895 if (noa) { 3896 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE); 3897 wpabuf_put_le16(resp, noa_len); 3898 wpabuf_put_data(resp, noa, noa_len); 3899 } else 3900 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL); 3901 p2p_buf_update_ie_hdr(resp, len); 3902 3903 return resp; 3904} 3905 3906 3907static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 3908 const u8 *sa, const u8 *data, size_t len, 3909 int rx_freq) 3910{ 3911 struct p2p_message msg; 3912 u8 status; 3913 struct wpabuf *resp; 3914 size_t g; 3915 struct p2p_group *group = NULL; 3916 int parsed = 0; 3917 u8 noa[50]; 3918 int noa_len; 3919 3920 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3921 "P2P: Received P2P Action - P2P Presence Request"); 3922 3923 for (g = 0; g < p2p->num_groups; g++) { 3924 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]), 3925 ETH_ALEN) == 0) { 3926 group = p2p->groups[g]; 3927 break; 3928 } 3929 } 3930 if (group == NULL) { 3931 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3932 "P2P: Ignore P2P Presence Request for unknown group " 3933 MACSTR, MAC2STR(da)); 3934 return; 3935 } 3936 3937 if (p2p_parse(data, len, &msg) < 0) { 3938 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3939 "P2P: Failed to parse P2P Presence Request"); 3940 status = P2P_SC_FAIL_INVALID_PARAMS; 3941 goto fail; 3942 } 3943 parsed = 1; 3944 3945 if (msg.noa == NULL) { 3946 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3947 "P2P: No NoA attribute in P2P Presence Request"); 3948 status = P2P_SC_FAIL_INVALID_PARAMS; 3949 goto fail; 3950 } 3951 3952 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len); 3953 3954fail: 3955 if (p2p->cfg->get_noa) 3956 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa, 3957 sizeof(noa)); 3958 else 3959 noa_len = -1; 3960 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL, 3961 noa_len > 0 ? noa_len : 0, 3962 msg.dialog_token); 3963 if (parsed) 3964 p2p_parse_free(&msg); 3965 if (resp == NULL) 3966 return; 3967 3968 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3969 if (p2p_send_action(p2p, rx_freq, sa, da, da, 3970 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 3971 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3972 "P2P: Failed to send Action frame"); 3973 } 3974 wpabuf_free(resp); 3975} 3976 3977 3978static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 3979 const u8 *sa, const u8 *data, size_t len) 3980{ 3981 struct p2p_message msg; 3982 3983 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3984 "P2P: Received P2P Action - P2P Presence Response"); 3985 3986 if (p2p_parse(data, len, &msg) < 0) { 3987 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3988 "P2P: Failed to parse P2P Presence Response"); 3989 return; 3990 } 3991 3992 if (msg.status == NULL || msg.noa == NULL) { 3993 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3994 "P2P: No Status or NoA attribute in P2P Presence " 3995 "Response"); 3996 p2p_parse_free(&msg); 3997 return; 3998 } 3999 4000 if (*msg.status) { 4001 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 4002 "P2P: P2P Presence Request was rejected: status %u", 4003 *msg.status); 4004 p2p_parse_free(&msg); 4005 return; 4006 } 4007 4008 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 4009 "P2P: P2P Presence Request was accepted"); 4010 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA", 4011 msg.noa, msg.noa_len); 4012 /* TODO: process NoA */ 4013 p2p_parse_free(&msg); 4014} 4015 4016 4017static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx) 4018{ 4019 struct p2p_data *p2p = eloop_ctx; 4020 4021 if (p2p->ext_listen_interval) { 4022 /* Schedule next extended listen timeout */ 4023 eloop_register_timeout(p2p->ext_listen_interval_sec, 4024 p2p->ext_listen_interval_usec, 4025 p2p_ext_listen_timeout, p2p, NULL); 4026 } 4027 4028 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) { 4029 /* 4030 * This should not really happen, but it looks like the Listen 4031 * command may fail is something else (e.g., a scan) was 4032 * running at an inconvenient time. As a workaround, allow new 4033 * Extended Listen operation to be started. 4034 */ 4035 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Previous " 4036 "Extended Listen operation had not been completed - " 4037 "try again"); 4038 p2p->ext_listen_only = 0; 4039 p2p_set_state(p2p, P2P_IDLE); 4040 } 4041 4042 if (p2p->state != P2P_IDLE) { 4043 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Skip Extended " 4044 "Listen timeout in active state (%s)", 4045 p2p_state_txt(p2p->state)); 4046 return; 4047 } 4048 4049 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Extended Listen timeout"); 4050 p2p->ext_listen_only = 1; 4051 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) { 4052 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Failed to start " 4053 "Listen state for Extended Listen Timing"); 4054 p2p->ext_listen_only = 0; 4055 } 4056} 4057 4058 4059int p2p_ext_listen(struct p2p_data *p2p, unsigned int period, 4060 unsigned int interval) 4061{ 4062 if (period > 65535 || interval > 65535 || period > interval || 4063 (period == 0 && interval > 0) || (period > 0 && interval == 0)) { 4064 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 4065 "P2P: Invalid Extended Listen Timing request: " 4066 "period=%u interval=%u", period, interval); 4067 return -1; 4068 } 4069 4070 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 4071 4072 if (interval == 0) { 4073 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 4074 "P2P: Disabling Extended Listen Timing"); 4075 p2p->ext_listen_period = 0; 4076 p2p->ext_listen_interval = 0; 4077 return 0; 4078 } 4079 4080 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 4081 "P2P: Enabling Extended Listen Timing: period %u msec, " 4082 "interval %u msec", period, interval); 4083 p2p->ext_listen_period = period; 4084 p2p->ext_listen_interval = interval; 4085 p2p->ext_listen_interval_sec = interval / 1000; 4086 p2p->ext_listen_interval_usec = (interval % 1000) * 1000; 4087 4088 eloop_register_timeout(p2p->ext_listen_interval_sec, 4089 p2p->ext_listen_interval_usec, 4090 p2p_ext_listen_timeout, p2p, NULL); 4091 4092 return 0; 4093} 4094 4095 4096void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 4097 const u8 *ie, size_t ie_len) 4098{ 4099 struct p2p_message msg; 4100 4101 if (bssid == NULL || ie == NULL) 4102 return; 4103 4104 os_memset(&msg, 0, sizeof(msg)); 4105 if (p2p_parse_ies(ie, ie_len, &msg)) 4106 return; 4107 if (msg.minor_reason_code == NULL) 4108 return; 4109 4110 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, 4111 "P2P: Deauthentication notification BSSID " MACSTR 4112 " reason_code=%u minor_reason_code=%u", 4113 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4114 4115 p2p_parse_free(&msg); 4116} 4117 4118 4119void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 4120 const u8 *ie, size_t ie_len) 4121{ 4122 struct p2p_message msg; 4123 4124 if (bssid == NULL || ie == NULL) 4125 return; 4126 4127 os_memset(&msg, 0, sizeof(msg)); 4128 if (p2p_parse_ies(ie, ie_len, &msg)) 4129 return; 4130 if (msg.minor_reason_code == NULL) 4131 return; 4132 4133 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, 4134 "P2P: Disassociation notification BSSID " MACSTR 4135 " reason_code=%u minor_reason_code=%u", 4136 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4137 4138 p2p_parse_free(&msg); 4139} 4140 4141 4142void p2p_set_managed_oper(struct p2p_data *p2p, int enabled) 4143{ 4144 if (enabled) { 4145 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Managed P2P " 4146 "Device operations enabled"); 4147 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED; 4148 } else { 4149 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Managed P2P " 4150 "Device operations disabled"); 4151 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED; 4152 } 4153} 4154 4155 4156int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel) 4157{ 4158 if (p2p_channel_to_freq(p2p->cfg->country, reg_class, channel) < 0) 4159 return -1; 4160 4161 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Set Listen channel: " 4162 "reg_class %u channel %u", reg_class, channel); 4163 p2p->cfg->reg_class = reg_class; 4164 p2p->cfg->channel = channel; 4165 4166 return 0; 4167} 4168 4169 4170int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len) 4171{ 4172 wpa_hexdump_ascii(MSG_DEBUG, "P2P: New SSID postfix", postfix, len); 4173 if (postfix == NULL) { 4174 p2p->cfg->ssid_postfix_len = 0; 4175 return 0; 4176 } 4177 if (len > sizeof(p2p->cfg->ssid_postfix)) 4178 return -1; 4179 os_memcpy(p2p->cfg->ssid_postfix, postfix, len); 4180 p2p->cfg->ssid_postfix_len = len; 4181 return 0; 4182} 4183 4184 4185int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel, 4186 int cfg_op_channel) 4187{ 4188 if (p2p_channel_to_freq(p2p->cfg->country, op_reg_class, op_channel) 4189 < 0) 4190 return -1; 4191 4192 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, "P2P: Set Operating channel: " 4193 "reg_class %u channel %u", op_reg_class, op_channel); 4194 p2p->cfg->op_reg_class = op_reg_class; 4195 p2p->cfg->op_channel = op_channel; 4196 p2p->cfg->cfg_op_channel = cfg_op_channel; 4197 return 0; 4198} 4199 4200 4201int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan, 4202 const struct p2p_channel *pref_chan) 4203{ 4204 struct p2p_channel *n; 4205 4206 if (pref_chan) { 4207 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel)); 4208 if (n == NULL) 4209 return -1; 4210 os_memcpy(n, pref_chan, 4211 num_pref_chan * sizeof(struct p2p_channel)); 4212 } else 4213 n = NULL; 4214 4215 os_free(p2p->cfg->pref_chan); 4216 p2p->cfg->pref_chan = n; 4217 p2p->cfg->num_pref_chan = num_pref_chan; 4218 4219 return 0; 4220} 4221 4222 4223int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr, 4224 u8 *iface_addr) 4225{ 4226 struct p2p_device *dev = p2p_get_device(p2p, dev_addr); 4227 if (dev == NULL || is_zero_ether_addr(dev->interface_addr)) 4228 return -1; 4229 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN); 4230 return 0; 4231} 4232 4233 4234int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr, 4235 u8 *dev_addr) 4236{ 4237 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4238 if (dev == NULL) 4239 return -1; 4240 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN); 4241 return 0; 4242} 4243 4244 4245void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr) 4246{ 4247 os_memcpy(p2p->peer_filter, addr, ETH_ALEN); 4248 if (is_zero_ether_addr(p2p->peer_filter)) 4249 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Disable peer " 4250 "filter"); 4251 else 4252 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Enable peer " 4253 "filter for " MACSTR, MAC2STR(p2p->peer_filter)); 4254} 4255 4256 4257void p2p_set_cross_connect(struct p2p_data *p2p, int enabled) 4258{ 4259 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Cross connection %s", 4260 enabled ? "enabled" : "disabled"); 4261 if (p2p->cross_connect == enabled) 4262 return; 4263 p2p->cross_connect = enabled; 4264 /* TODO: may need to tear down any action group where we are GO(?) */ 4265} 4266 4267 4268int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr) 4269{ 4270 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4271 if (dev == NULL) 4272 return -1; 4273 if (dev->oper_freq <= 0) 4274 return -1; 4275 return dev->oper_freq; 4276} 4277 4278 4279void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled) 4280{ 4281 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Intra BSS distribution %s", 4282 enabled ? "enabled" : "disabled"); 4283 p2p->cfg->p2p_intra_bss = enabled; 4284} 4285 4286 4287void p2p_update_channel_list(struct p2p_data *p2p, struct p2p_channels *chan) 4288{ 4289 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Update channel list"); 4290 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels)); 4291} 4292 4293 4294int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 4295 const u8 *src, const u8 *bssid, const u8 *buf, 4296 size_t len, unsigned int wait_time) 4297{ 4298 if (p2p->p2p_scan_running) { 4299 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Delay Action " 4300 "frame TX until p2p_scan completes"); 4301 if (p2p->after_scan_tx) { 4302 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Dropped " 4303 "previous pending Action frame TX"); 4304 os_free(p2p->after_scan_tx); 4305 } 4306 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) + 4307 len); 4308 if (p2p->after_scan_tx == NULL) 4309 return -1; 4310 p2p->after_scan_tx->freq = freq; 4311 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN); 4312 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN); 4313 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN); 4314 p2p->after_scan_tx->len = len; 4315 p2p->after_scan_tx->wait_time = wait_time; 4316 os_memcpy(p2p->after_scan_tx + 1, buf, len); 4317 return 0; 4318 } 4319 4320 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid, 4321 buf, len, wait_time); 4322} 4323 4324 4325void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5, 4326 int freq_overall) 4327{ 4328 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Best channel: 2.4 GHz: %d," 4329 " 5 GHz: %d, overall: %d", freq_24, freq_5, freq_overall); 4330 p2p->best_freq_24 = freq_24; 4331 p2p->best_freq_5 = freq_5; 4332 p2p->best_freq_overall = freq_overall; 4333} 4334 4335 4336void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq) 4337{ 4338 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Own frequency preference: " 4339 "%d MHz", freq); 4340 p2p->own_freq_preference = freq; 4341} 4342 4343 4344const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p) 4345{ 4346 if (p2p == NULL || p2p->go_neg_peer == NULL) 4347 return NULL; 4348 return p2p->go_neg_peer->info.p2p_device_addr; 4349} 4350 4351 4352const struct p2p_peer_info * 4353p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next) 4354{ 4355 struct p2p_device *dev; 4356 4357 if (addr) { 4358 dev = p2p_get_device(p2p, addr); 4359 if (!dev) 4360 return NULL; 4361 4362 if (!next) { 4363 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 4364 return NULL; 4365 4366 return &dev->info; 4367 } else { 4368 do { 4369 dev = dl_list_first(&dev->list, 4370 struct p2p_device, 4371 list); 4372 if (&dev->list == &p2p->devices) 4373 return NULL; 4374 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY); 4375 } 4376 } else { 4377 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4378 if (!dev) 4379 return NULL; 4380 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 4381 dev = dl_list_first(&dev->list, 4382 struct p2p_device, 4383 list); 4384 if (&dev->list == &p2p->devices) 4385 return NULL; 4386 } 4387 } 4388 4389 return &dev->info; 4390} 4391 4392#ifdef ANDROID_P2P 4393int p2p_search_in_progress(struct p2p_data *p2p) 4394{ 4395 if (p2p == NULL) 4396 return 0; 4397 4398 return p2p->state == P2P_SEARCH; 4399} 4400#endif 4401 4402int p2p_in_progress(struct p2p_data *p2p) 4403{ 4404 if (p2p == NULL) 4405 return 0; 4406 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SEARCH_WHEN_READY || 4407 p2p->state == P2P_CONTINUE_SEARCH_WHEN_READY) 4408 return 2; 4409 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING; 4410} 4411 4412 4413void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout, 4414 u8 client_timeout) 4415{ 4416 if (p2p) { 4417 p2p->go_timeout = go_timeout; 4418 p2p->client_timeout = client_timeout; 4419 } 4420} 4421 4422 4423void p2p_increase_search_delay(struct p2p_data *p2p, unsigned int delay) 4424{ 4425 if (p2p && p2p->search_delay < delay) 4426 p2p->search_delay = delay; 4427} 4428 4429 4430#ifdef CONFIG_WIFI_DISPLAY 4431 4432static void p2p_update_wfd_ie_groups(struct p2p_data *p2p) 4433{ 4434 size_t g; 4435 struct p2p_group *group; 4436 4437 for (g = 0; g < p2p->num_groups; g++) { 4438 group = p2p->groups[g]; 4439 p2p_group_update_ies(group); 4440 } 4441} 4442 4443 4444int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie) 4445{ 4446 wpabuf_free(p2p->wfd_ie_beacon); 4447 p2p->wfd_ie_beacon = ie; 4448 p2p_update_wfd_ie_groups(p2p); 4449 return 0; 4450} 4451 4452 4453int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie) 4454{ 4455 wpabuf_free(p2p->wfd_ie_probe_req); 4456 p2p->wfd_ie_probe_req = ie; 4457 return 0; 4458} 4459 4460 4461int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie) 4462{ 4463 wpabuf_free(p2p->wfd_ie_probe_resp); 4464 p2p->wfd_ie_probe_resp = ie; 4465 p2p_update_wfd_ie_groups(p2p); 4466 return 0; 4467} 4468 4469 4470int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie) 4471{ 4472 wpabuf_free(p2p->wfd_ie_assoc_req); 4473 p2p->wfd_ie_assoc_req = ie; 4474 return 0; 4475} 4476 4477 4478int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie) 4479{ 4480 wpabuf_free(p2p->wfd_ie_invitation); 4481 p2p->wfd_ie_invitation = ie; 4482 return 0; 4483} 4484 4485 4486int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie) 4487{ 4488 wpabuf_free(p2p->wfd_ie_prov_disc_req); 4489 p2p->wfd_ie_prov_disc_req = ie; 4490 return 0; 4491} 4492 4493 4494int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie) 4495{ 4496 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 4497 p2p->wfd_ie_prov_disc_resp = ie; 4498 return 0; 4499} 4500 4501 4502int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie) 4503{ 4504 wpabuf_free(p2p->wfd_ie_go_neg); 4505 p2p->wfd_ie_go_neg = ie; 4506 return 0; 4507} 4508 4509 4510int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem) 4511{ 4512 wpabuf_free(p2p->wfd_dev_info); 4513 if (elem) { 4514 p2p->wfd_dev_info = wpabuf_dup(elem); 4515 if (p2p->wfd_dev_info == NULL) 4516 return -1; 4517 } else 4518 p2p->wfd_dev_info = NULL; 4519 4520 return 0; 4521} 4522 4523 4524int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem) 4525{ 4526 wpabuf_free(p2p->wfd_assoc_bssid); 4527 if (elem) { 4528 p2p->wfd_assoc_bssid = wpabuf_dup(elem); 4529 if (p2p->wfd_assoc_bssid == NULL) 4530 return -1; 4531 } else 4532 p2p->wfd_assoc_bssid = NULL; 4533 4534 return 0; 4535} 4536 4537 4538int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p, 4539 const struct wpabuf *elem) 4540{ 4541 wpabuf_free(p2p->wfd_coupled_sink_info); 4542 if (elem) { 4543 p2p->wfd_coupled_sink_info = wpabuf_dup(elem); 4544 if (p2p->wfd_coupled_sink_info == NULL) 4545 return -1; 4546 } else 4547 p2p->wfd_coupled_sink_info = NULL; 4548 4549 return 0; 4550} 4551 4552#endif /* CONFIG_WIFI_DISPLAY */ 4553 4554 4555int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int, 4556 int max_disc_tu) 4557{ 4558 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0) 4559 return -1; 4560 4561 p2p->min_disc_int = min_disc_int; 4562 p2p->max_disc_int = max_disc_int; 4563 p2p->max_disc_tu = max_disc_tu; 4564 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Set discoverable interval: " 4565 "min=%d max=%d max_tu=%d", min_disc_int, max_disc_int, 4566 max_disc_tu); 4567 4568 return 0; 4569} 4570