p2p.c revision a0d265f81180f341d22511538fa18166e1bbce9f
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 "wps/wps_i.h" 16#include "p2p_i.h" 17#include "p2p.h" 18 19 20static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx); 21static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev); 22static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 23 const u8 *sa, const u8 *data, size_t len, 24 int rx_freq); 25static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 26 const u8 *sa, const u8 *data, 27 size_t len); 28static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx); 29static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx); 30 31 32/* 33 * p2p_scan recovery timeout 34 * 35 * Many drivers are using 30 second timeout on scan results. Allow a bit larger 36 * timeout for this to avoid hitting P2P timeout unnecessarily. 37 */ 38#define P2P_SCAN_TIMEOUT 35 39 40/** 41 * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer 42 * entries will be removed 43 */ 44#ifdef ANDROID_P2P 45#define P2P_PEER_EXPIRATION_AGE 30 46#else 47#define P2P_PEER_EXPIRATION_AGE 300 48#endif 49 50#define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2) 51 52#ifdef ANDROID_P2P 53int p2p_connection_in_progress(struct p2p_data *p2p) 54{ 55 int ret = 0; 56 57 switch (p2p->state) { 58 case P2P_CONNECT: 59 case P2P_CONNECT_LISTEN: 60 case P2P_GO_NEG: 61 case P2P_WAIT_PEER_CONNECT: 62 case P2P_WAIT_PEER_IDLE: 63 case P2P_PROVISIONING: 64 case P2P_INVITE: 65 case P2P_INVITE_LISTEN: 66 ret = 1; 67 break; 68 69 default: 70 wpa_printf(MSG_DEBUG, "p2p_connection_in_progress state %d", p2p->state); 71 ret = 0; 72 } 73 74 return ret; 75} 76#endif 77 78static void p2p_expire_peers(struct p2p_data *p2p) 79{ 80 struct p2p_device *dev, *n; 81 struct os_time now; 82 size_t i; 83 84 os_get_time(&now); 85 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) { 86 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec) 87 continue; 88 89 if (p2p->cfg->go_connected && 90 p2p->cfg->go_connected(p2p->cfg->cb_ctx, 91 dev->info.p2p_device_addr)) { 92 /* 93 * We are connected as a client to a group in which the 94 * peer is the GO, so do not expire the peer entry. 95 */ 96 os_get_time(&dev->last_seen); 97 continue; 98 } 99 100 for (i = 0; i < p2p->num_groups; i++) { 101 if (p2p_group_is_client_connected( 102 p2p->groups[i], dev->info.p2p_device_addr)) 103 break; 104 } 105 if (i < p2p->num_groups) { 106 /* 107 * The peer is connected as a client in a group where 108 * we are the GO, so do not expire the peer entry. 109 */ 110 os_get_time(&dev->last_seen); 111 continue; 112 } 113 114#ifdef ANDROID_P2P 115 /* If Connection is in progress, don't expire the peer 116 */ 117 if (p2p_connection_in_progress(p2p)) 118 continue; 119#endif 120 121 p2p_dbg(p2p, "Expiring old peer entry " MACSTR, 122 MAC2STR(dev->info.p2p_device_addr)); 123 124#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 183const char * p2p_get_state_txt(struct p2p_data *p2p) 184{ 185 return p2p_state_txt(p2p->state); 186} 187 188 189u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr) 190{ 191 struct p2p_device *dev = NULL; 192 193 if (!addr || !p2p) 194 return 0; 195 196 dev = p2p_get_device(p2p, addr); 197 if (dev) 198 return dev->wps_prov_info; 199 else 200 return 0; 201} 202 203 204void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr) 205{ 206 struct p2p_device *dev = NULL; 207 208 if (!addr || !p2p) 209 return; 210 211 dev = p2p_get_device(p2p, addr); 212 if (dev) 213 dev->wps_prov_info = 0; 214} 215 216 217void p2p_set_state(struct p2p_data *p2p, int new_state) 218{ 219 p2p_dbg(p2p, "State %s -> %s", 220 p2p_state_txt(p2p->state), p2p_state_txt(new_state)); 221 p2p->state = new_state; 222} 223 224 225void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec) 226{ 227 p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec", 228 p2p_state_txt(p2p->state), sec, usec); 229 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 230 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL); 231} 232 233 234void p2p_clear_timeout(struct p2p_data *p2p) 235{ 236 p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state)); 237 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 238} 239 240 241void p2p_go_neg_failed(struct p2p_data *p2p, struct p2p_device *peer, 242 int status) 243{ 244 struct p2p_go_neg_results res; 245 p2p_clear_timeout(p2p); 246 p2p_set_state(p2p, P2P_IDLE); 247 if (p2p->go_neg_peer) { 248 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 249 p2p->go_neg_peer->wps_method = WPS_NOT_READY; 250 } 251 p2p->go_neg_peer = NULL; 252 253 os_memset(&res, 0, sizeof(res)); 254 res.status = status; 255 if (peer) { 256 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, 257 ETH_ALEN); 258 os_memcpy(res.peer_interface_addr, peer->intended_addr, 259 ETH_ALEN); 260 } 261 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 262} 263 264 265static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc) 266{ 267 unsigned int r, tu; 268 int freq; 269 struct wpabuf *ies; 270 271 p2p_dbg(p2p, "Starting short listen state (state=%s)", 272 p2p_state_txt(p2p->state)); 273 274 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 275 if (freq < 0) { 276 p2p_dbg(p2p, "Unknown regulatory class/channel"); 277 return; 278 } 279 280 os_get_random((u8 *) &r, sizeof(r)); 281 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) + 282 p2p->min_disc_int) * 100; 283 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu) 284 tu = p2p->max_disc_tu; 285 if (!dev_disc && tu < 100) 286 tu = 100; /* Need to wait in non-device discovery use cases */ 287 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen) 288 tu = p2p->cfg->max_listen * 1000 / 1024; 289 290 if (tu == 0) { 291 p2p_dbg(p2p, "Skip listen state 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 p2p_dbg(p2p, "Failed to start listen mode"); 307 p2p->pending_listen_freq = 0; 308 } 309 wpabuf_free(ies); 310} 311 312 313int p2p_listen(struct p2p_data *p2p, unsigned int timeout) 314{ 315 int freq; 316 struct wpabuf *ies; 317 318 p2p_dbg(p2p, "Going to listen(only) state"); 319 320 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 321 if (freq < 0) { 322 p2p_dbg(p2p, "Unknown regulatory class/channel"); 323 return -1; 324 } 325 326 p2p->pending_listen_freq = freq; 327 p2p->pending_listen_sec = timeout / 1000; 328 p2p->pending_listen_usec = (timeout % 1000) * 1000; 329 330 if (p2p->p2p_scan_running) { 331 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) { 332 p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen"); 333 return 0; 334 } 335 p2p_dbg(p2p, "p2p_scan running - delay start of listen state"); 336 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN; 337 return 0; 338 } 339 340 ies = p2p_build_probe_resp_ies(p2p); 341 if (ies == NULL) 342 return -1; 343 344 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) { 345 p2p_dbg(p2p, "Failed to start listen mode"); 346 p2p->pending_listen_freq = 0; 347 wpabuf_free(ies); 348 return -1; 349 } 350 wpabuf_free(ies); 351 352 p2p_set_state(p2p, P2P_LISTEN_ONLY); 353 354 return 0; 355} 356 357 358static void p2p_device_clear_reported(struct p2p_data *p2p) 359{ 360 struct p2p_device *dev; 361 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) 362 dev->flags &= ~P2P_DEV_REPORTED; 363} 364 365 366/** 367 * p2p_get_device - Fetch a peer entry 368 * @p2p: P2P module context from p2p_init() 369 * @addr: P2P Device Address of the peer 370 * Returns: Pointer to the device entry or %NULL if not found 371 */ 372struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr) 373{ 374 struct p2p_device *dev; 375 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 376 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0) 377 return dev; 378 } 379 return NULL; 380} 381 382 383/** 384 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address 385 * @p2p: P2P module context from p2p_init() 386 * @addr: P2P Interface Address of the peer 387 * Returns: Pointer to the device entry or %NULL if not found 388 */ 389struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p, 390 const u8 *addr) 391{ 392 struct p2p_device *dev; 393 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 394 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0) 395 return dev; 396 } 397 return NULL; 398} 399 400 401/** 402 * p2p_create_device - Create a peer entry 403 * @p2p: P2P module context from p2p_init() 404 * @addr: P2P Device Address of the peer 405 * Returns: Pointer to the device entry or %NULL on failure 406 * 407 * If there is already an entry for the peer, it will be returned instead of 408 * creating a new one. 409 */ 410static struct p2p_device * p2p_create_device(struct p2p_data *p2p, 411 const u8 *addr) 412{ 413 struct p2p_device *dev, *oldest = NULL; 414 size_t count = 0; 415 416 dev = p2p_get_device(p2p, addr); 417 if (dev) 418 return dev; 419 420 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 421 count++; 422 if (oldest == NULL || 423 os_time_before(&dev->last_seen, &oldest->last_seen)) 424 oldest = dev; 425 } 426 if (count + 1 > p2p->cfg->max_peers && oldest) { 427 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer"); 428#ifdef ANDROID_P2P 429 /* SD_FAIR_POLICY: Update the current sd_dev_list pointer to next device */ 430 if(&oldest->list == p2p->sd_dev_list) 431 p2p->sd_dev_list = oldest->list.next; 432#endif 433 dl_list_del(&oldest->list); 434 p2p_device_free(p2p, oldest); 435 } 436 437 dev = os_zalloc(sizeof(*dev)); 438 if (dev == NULL) 439 return NULL; 440 dl_list_add(&p2p->devices, &dev->list); 441 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN); 442 443 return dev; 444} 445 446 447static void p2p_copy_client_info(struct p2p_device *dev, 448 struct p2p_client_info *cli) 449{ 450 os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len); 451 dev->info.device_name[cli->dev_name_len] = '\0'; 452 dev->info.dev_capab = cli->dev_capab; 453 dev->info.config_methods = cli->config_methods; 454 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8); 455 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types; 456 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types, 457 dev->info.wps_sec_dev_type_list_len); 458} 459 460 461static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr, 462 const u8 *go_interface_addr, int freq, 463 const u8 *gi, size_t gi_len) 464{ 465 struct p2p_group_info info; 466 size_t c; 467 struct p2p_device *dev; 468 469 if (gi == NULL) 470 return 0; 471 472 if (p2p_group_info_parse(gi, gi_len, &info) < 0) 473 return -1; 474 475 /* 476 * Clear old data for this group; if the devices are still in the 477 * group, the information will be restored in the loop following this. 478 */ 479 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 480 if (os_memcmp(dev->member_in_go_iface, go_interface_addr, 481 ETH_ALEN) == 0) { 482 os_memset(dev->member_in_go_iface, 0, ETH_ALEN); 483 os_memset(dev->member_in_go_dev, 0, ETH_ALEN); 484 } 485 } 486 487 for (c = 0; c < info.num_clients; c++) { 488 struct p2p_client_info *cli = &info.client[c]; 489 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr, 490 ETH_ALEN) == 0) 491 continue; /* ignore our own entry */ 492 dev = p2p_get_device(p2p, cli->p2p_device_addr); 493 if (dev) { 494 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY | 495 P2P_DEV_PROBE_REQ_ONLY)) { 496 /* 497 * Update information since we have not 498 * received this directly from the client. 499 */ 500 p2p_copy_client_info(dev, cli); 501 } else { 502 /* 503 * Need to update P2P Client Discoverability 504 * flag since it is valid only in P2P Group 505 * Info attribute. 506 */ 507 dev->info.dev_capab &= 508 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 509 dev->info.dev_capab |= 510 cli->dev_capab & 511 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 512 } 513 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 514 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 515 } 516 } else { 517 dev = p2p_create_device(p2p, cli->p2p_device_addr); 518 if (dev == NULL) 519 continue; 520 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 521 p2p_copy_client_info(dev, cli); 522 dev->oper_freq = freq; 523 p2p->cfg->dev_found(p2p->cfg->cb_ctx, 524 dev->info.p2p_device_addr, 525 &dev->info, 1); 526 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 527 } 528 529 os_memcpy(dev->interface_addr, cli->p2p_interface_addr, 530 ETH_ALEN); 531 os_get_time(&dev->last_seen); 532 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN); 533 os_memcpy(dev->member_in_go_iface, go_interface_addr, 534 ETH_ALEN); 535 } 536 537 return 0; 538} 539 540 541static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev, 542 int probe_req, const struct p2p_message *msg) 543{ 544 os_memcpy(dev->info.device_name, msg->device_name, 545 sizeof(dev->info.device_name)); 546 547 if (msg->manufacturer && 548 msg->manufacturer_len < sizeof(dev->info.manufacturer)) { 549 os_memset(dev->info.manufacturer, 0, 550 sizeof(dev->info.manufacturer)); 551 os_memcpy(dev->info.manufacturer, msg->manufacturer, 552 msg->manufacturer_len); 553 } 554 555 if (msg->model_name && 556 msg->model_name_len < sizeof(dev->info.model_name)) { 557 os_memset(dev->info.model_name, 0, 558 sizeof(dev->info.model_name)); 559 os_memcpy(dev->info.model_name, msg->model_name, 560 msg->model_name_len); 561 } 562 563 if (msg->model_number && 564 msg->model_number_len < sizeof(dev->info.model_number)) { 565 os_memset(dev->info.model_number, 0, 566 sizeof(dev->info.model_number)); 567 os_memcpy(dev->info.model_number, msg->model_number, 568 msg->model_number_len); 569 } 570 571 if (msg->serial_number && 572 msg->serial_number_len < sizeof(dev->info.serial_number)) { 573 os_memset(dev->info.serial_number, 0, 574 sizeof(dev->info.serial_number)); 575 os_memcpy(dev->info.serial_number, msg->serial_number, 576 msg->serial_number_len); 577 } 578 579 if (msg->pri_dev_type) 580 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type, 581 sizeof(dev->info.pri_dev_type)); 582 else if (msg->wps_pri_dev_type) 583 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type, 584 sizeof(dev->info.pri_dev_type)); 585 586 if (msg->wps_sec_dev_type_list) { 587 os_memcpy(dev->info.wps_sec_dev_type_list, 588 msg->wps_sec_dev_type_list, 589 msg->wps_sec_dev_type_list_len); 590 dev->info.wps_sec_dev_type_list_len = 591 msg->wps_sec_dev_type_list_len; 592 } 593 594 if (msg->capability) { 595 /* 596 * P2P Client Discoverability bit is reserved in all frames 597 * that use this function, so do not change its value here. 598 */ 599 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 600 dev->info.dev_capab |= msg->capability[0] & 601 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 602 dev->info.group_capab = msg->capability[1]; 603 } 604 605 if (msg->ext_listen_timing) { 606 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing); 607 dev->ext_listen_interval = 608 WPA_GET_LE16(msg->ext_listen_timing + 2); 609 } 610 611 if (!probe_req) { 612 u16 new_config_methods; 613 new_config_methods = msg->config_methods ? 614 msg->config_methods : msg->wps_config_methods; 615 if (new_config_methods && 616 dev->info.config_methods != new_config_methods) { 617 p2p_dbg(p2p, "Update peer " MACSTR 618 " config_methods 0x%x -> 0x%x", 619 MAC2STR(dev->info.p2p_device_addr), 620 dev->info.config_methods, 621 new_config_methods); 622 dev->info.config_methods = new_config_methods; 623 } 624 } 625} 626 627 628/** 629 * p2p_add_device - Add peer entries based on scan results or P2P frames 630 * @p2p: P2P module context from p2p_init() 631 * @addr: Source address of Beacon or Probe Response frame (may be either 632 * P2P Device Address or P2P Interface Address) 633 * @level: Signal level (signal strength of the received frame from the peer) 634 * @freq: Frequency on which the Beacon or Probe Response frame was received 635 * @rx_time: Time when the result was received 636 * @ies: IEs from the Beacon or Probe Response frame 637 * @ies_len: Length of ies buffer in octets 638 * @scan_res: Whether this was based on scan results 639 * Returns: 0 on success, -1 on failure 640 * 641 * If the scan result is for a GO, the clients in the group will also be added 642 * to the peer table. This function can also be used with some other frames 643 * like Provision Discovery Request that contains P2P Capability and P2P Device 644 * Info attributes. 645 */ 646int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq, 647 struct os_time *rx_time, int level, const u8 *ies, 648 size_t ies_len, int scan_res) 649{ 650 struct p2p_device *dev; 651 struct p2p_message msg; 652 const u8 *p2p_dev_addr; 653 int i; 654 struct os_time time_now; 655 656 os_memset(&msg, 0, sizeof(msg)); 657 if (p2p_parse_ies(ies, ies_len, &msg)) { 658 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry"); 659 p2p_parse_free(&msg); 660 return -1; 661 } 662 663 if (msg.p2p_device_addr) 664 p2p_dev_addr = msg.p2p_device_addr; 665 else if (msg.device_id) 666 p2p_dev_addr = msg.device_id; 667 else { 668 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 669 p2p_parse_free(&msg); 670 return -1; 671 } 672 673 if (!is_zero_ether_addr(p2p->peer_filter) && 674 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) { 675 p2p_dbg(p2p, "Do not add peer filter for " MACSTR 676 " due to peer filter", MAC2STR(p2p_dev_addr)); 677 p2p_parse_free(&msg); 678 return 0; 679 } 680 681 dev = p2p_create_device(p2p, p2p_dev_addr); 682 if (dev == NULL) { 683 p2p_parse_free(&msg); 684 return -1; 685 } 686 687 if (rx_time == NULL) { 688 os_get_time(&time_now); 689 rx_time = &time_now; 690 } 691 692 /* 693 * Update the device entry only if the new peer 694 * entry is newer than the one previously stored. 695 */ 696 if (dev->last_seen.sec > 0 && 697 os_time_before(rx_time, &dev->last_seen)) { 698 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)", 699 (unsigned int) rx_time->sec, 700 (unsigned int) rx_time->usec, 701 (unsigned int) dev->last_seen.sec, 702 (unsigned int) dev->last_seen.usec); 703 p2p_parse_free(&msg); 704 return -1; 705 } 706 707 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_time)); 708 709 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 710 711 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0) 712 os_memcpy(dev->interface_addr, addr, ETH_ALEN); 713 if (msg.ssid && 714 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 715 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 716 != 0)) { 717 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]); 718 dev->oper_ssid_len = msg.ssid[1]; 719 } 720 721 if (freq >= 2412 && freq <= 2484 && msg.ds_params && 722 *msg.ds_params >= 1 && *msg.ds_params <= 14) { 723 int ds_freq; 724 if (*msg.ds_params == 14) 725 ds_freq = 2484; 726 else 727 ds_freq = 2407 + *msg.ds_params * 5; 728 if (freq != ds_freq) { 729 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz", 730 freq, ds_freq); 731 freq = ds_freq; 732 } 733 } 734 735 if (dev->listen_freq && dev->listen_freq != freq && scan_res) { 736 p2p_dbg(p2p, "Update Listen frequency based on scan results (" 737 MACSTR " %d -> %d MHz (DS param %d)", 738 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq, 739 freq, msg.ds_params ? *msg.ds_params : -1); 740 } 741 if (scan_res) { 742 dev->listen_freq = freq; 743 if (msg.group_info) 744 dev->oper_freq = freq; 745 } 746 dev->info.level = level; 747 748 p2p_copy_wps_info(p2p, dev, 0, &msg); 749 750 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 751 wpabuf_free(dev->info.wps_vendor_ext[i]); 752 dev->info.wps_vendor_ext[i] = NULL; 753 } 754 755 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 756 if (msg.wps_vendor_ext[i] == NULL) 757 break; 758 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy( 759 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]); 760 if (dev->info.wps_vendor_ext[i] == NULL) 761 break; 762 } 763 764 if (msg.wfd_subelems) { 765 wpabuf_free(dev->info.wfd_subelems); 766 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 767 } 768 769 if (scan_res) { 770 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq, 771 msg.group_info, msg.group_info_len); 772 } 773 774 p2p_parse_free(&msg); 775 776 if (p2p_pending_sd_req(p2p, dev)) 777 dev->flags |= P2P_DEV_SD_SCHEDULE; 778 779 if (dev->flags & P2P_DEV_REPORTED) 780 return 0; 781 782 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)", 783 freq, (unsigned int) rx_time->sec, 784 (unsigned int) rx_time->usec); 785 if (dev->flags & P2P_DEV_USER_REJECTED) { 786 p2p_dbg(p2p, "Do not report rejected device"); 787 return 0; 788 } 789 790 if (dev->info.config_methods == 0 && 791 (freq == 2412 || freq == 2437 || freq == 2462)) { 792 /* 793 * If we have only seen a Beacon frame from a GO, we do not yet 794 * know what WPS config methods it supports. Since some 795 * applications use config_methods value from P2P-DEVICE-FOUND 796 * events, postpone reporting this peer until we've fully 797 * discovered its capabilities. 798 * 799 * At least for now, do this only if the peer was detected on 800 * one of the social channels since that peer can be easily be 801 * found again and there are no limitations of having to use 802 * passive scan on this channels, so this can be done through 803 * Probe Response frame that includes the config_methods 804 * information. 805 */ 806 p2p_dbg(p2p, "Do not report peer " MACSTR 807 " with unknown config methods", MAC2STR(addr)); 808 return 0; 809 } 810 811 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 812 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 813 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 814 815 return 0; 816} 817 818 819static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev) 820{ 821 int i; 822 823 if (p2p->go_neg_peer == dev) { 824 /* 825 * If GO Negotiation is in progress, report that it has failed. 826 */ 827 p2p_go_neg_failed(p2p, dev, -1); 828 p2p->go_neg_peer = NULL; 829 } 830 if (p2p->invite_peer == dev) 831 p2p->invite_peer = NULL; 832 if (p2p->sd_peer == dev) 833 p2p->sd_peer = NULL; 834 if (p2p->pending_client_disc_go == dev) 835 p2p->pending_client_disc_go = NULL; 836 837 /* dev_lost() device, but only if it was previously dev_found() */ 838 if (dev->flags & P2P_DEV_REPORTED_ONCE) 839 p2p->cfg->dev_lost(p2p->cfg->cb_ctx, 840 dev->info.p2p_device_addr); 841 842 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 843 wpabuf_free(dev->info.wps_vendor_ext[i]); 844 dev->info.wps_vendor_ext[i] = NULL; 845 } 846 847 wpabuf_free(dev->info.wfd_subelems); 848 849 os_free(dev); 850} 851 852 853static int p2p_get_next_prog_freq(struct p2p_data *p2p) 854{ 855 struct p2p_channels *c; 856 struct p2p_reg_class *cla; 857 size_t cl, ch; 858 int found = 0; 859 u8 reg_class; 860 u8 channel; 861 int freq; 862 863 c = &p2p->cfg->channels; 864 for (cl = 0; cl < c->reg_classes; cl++) { 865 cla = &c->reg_class[cl]; 866 if (cla->reg_class != p2p->last_prog_scan_class) 867 continue; 868 for (ch = 0; ch < cla->channels; ch++) { 869 if (cla->channel[ch] == p2p->last_prog_scan_chan) { 870 found = 1; 871 break; 872 } 873 } 874 if (found) 875 break; 876 } 877 878 if (!found) { 879 /* Start from beginning */ 880 reg_class = c->reg_class[0].reg_class; 881 channel = c->reg_class[0].channel[0]; 882 } else { 883 /* Pick the next channel */ 884 ch++; 885 if (ch == cla->channels) { 886 cl++; 887 if (cl == c->reg_classes) 888 cl = 0; 889 ch = 0; 890 } 891 reg_class = c->reg_class[cl].reg_class; 892 channel = c->reg_class[cl].channel[ch]; 893 } 894 895 freq = p2p_channel_to_freq(reg_class, channel); 896 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz", 897 reg_class, channel, freq); 898 p2p->last_prog_scan_class = reg_class; 899 p2p->last_prog_scan_chan = channel; 900 901 if (freq == 2412 || freq == 2437 || freq == 2462) 902 return 0; /* No need to add social channels */ 903 return freq; 904} 905 906 907static void p2p_search(struct p2p_data *p2p) 908{ 909 int freq = 0; 910 enum p2p_scan_type type; 911 u16 pw_id = DEV_PW_DEFAULT; 912 int res; 913 914 if (p2p->drv_in_listen) { 915 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing"); 916 return; 917 } 918 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 919 920 if (p2p->find_type == P2P_FIND_PROGRESSIVE && 921 (freq = p2p_get_next_prog_freq(p2p)) > 0) { 922 type = P2P_SCAN_SOCIAL_PLUS_ONE; 923 p2p_dbg(p2p, "Starting search (+ freq %u)", freq); 924 } else { 925 type = P2P_SCAN_SOCIAL; 926 p2p_dbg(p2p, "Starting search"); 927 } 928 929 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq, 930 p2p->num_req_dev_types, p2p->req_dev_types, 931 p2p->find_dev_id, pw_id); 932 if (res < 0) { 933 p2p_dbg(p2p, "Scan request failed"); 934 p2p_continue_find(p2p); 935 } else if (res == 1) { 936 p2p_dbg(p2p, "Could not start p2p_scan at this point - will try again after previous scan completes"); 937 p2p_set_state(p2p, P2P_CONTINUE_SEARCH_WHEN_READY); 938 } else { 939 p2p_dbg(p2p, "Running p2p_scan"); 940 p2p->p2p_scan_running = 1; 941 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 942 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 943 p2p, NULL); 944 } 945} 946 947 948static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx) 949{ 950 struct p2p_data *p2p = eloop_ctx; 951 p2p_dbg(p2p, "Find timeout -> stop"); 952 p2p_stop_find(p2p); 953} 954 955 956static int p2p_run_after_scan(struct p2p_data *p2p) 957{ 958 struct p2p_device *dev; 959 enum p2p_after_scan op; 960 961 if (p2p->after_scan_tx) { 962 p2p->after_scan_tx_in_progress = 1; 963 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion"); 964 p2p->cfg->send_action(p2p->cfg->cb_ctx, 965 p2p->after_scan_tx->freq, 966 p2p->after_scan_tx->dst, 967 p2p->after_scan_tx->src, 968 p2p->after_scan_tx->bssid, 969 (u8 *) (p2p->after_scan_tx + 1), 970 p2p->after_scan_tx->len, 971 p2p->after_scan_tx->wait_time); 972 os_free(p2p->after_scan_tx); 973 p2p->after_scan_tx = NULL; 974#ifdef ANDROID_P2P 975 /* For SD frames, there is a scenario, where we can receive a SD request frame during p2p_scan. 976 * At that moment, we will send the SD response from this context. After sending the SD response, 977 * we need to continue p2p_find. But if we return 1 from here, p2p_find is going to be stopped. 978 */ 979 return 0; 980#else 981 return 1; 982#endif 983 } 984 985 op = p2p->start_after_scan; 986 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 987 switch (op) { 988 case P2P_AFTER_SCAN_NOTHING: 989 break; 990 case P2P_AFTER_SCAN_LISTEN: 991 p2p_dbg(p2p, "Start previously requested Listen state"); 992 p2p_listen(p2p, p2p->pending_listen_sec * 1000 + 993 p2p->pending_listen_usec / 1000); 994 return 1; 995 case P2P_AFTER_SCAN_CONNECT: 996 p2p_dbg(p2p, "Start previously requested connect with " MACSTR, 997 MAC2STR(p2p->after_scan_peer)); 998 dev = p2p_get_device(p2p, p2p->after_scan_peer); 999 if (dev == NULL) { 1000 p2p_dbg(p2p, "Peer not known anymore"); 1001 break; 1002 } 1003 p2p_connect_send(p2p, dev); 1004 return 1; 1005 } 1006 1007 return 0; 1008} 1009 1010 1011static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx) 1012{ 1013 struct p2p_data *p2p = eloop_ctx; 1014 int running; 1015 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running); 1016 running = p2p->p2p_scan_running; 1017 /* Make sure we recover from missed scan results callback */ 1018 p2p->p2p_scan_running = 0; 1019 1020 if (running) 1021 p2p_run_after_scan(p2p); 1022} 1023 1024 1025static void p2p_free_req_dev_types(struct p2p_data *p2p) 1026{ 1027 p2p->num_req_dev_types = 0; 1028 os_free(p2p->req_dev_types); 1029 p2p->req_dev_types = NULL; 1030} 1031 1032 1033int p2p_find(struct p2p_data *p2p, unsigned int timeout, 1034 enum p2p_discovery_type type, 1035 unsigned int num_req_dev_types, const u8 *req_dev_types, 1036 const u8 *dev_id, unsigned int search_delay) 1037{ 1038 int res; 1039 1040 p2p_dbg(p2p, "Starting find (type=%d)", type); 1041 os_get_time(&p2p->find_start); 1042 if (p2p->p2p_scan_running) { 1043 p2p_dbg(p2p, "p2p_scan is already running"); 1044 } 1045 1046 p2p_free_req_dev_types(p2p); 1047 if (req_dev_types && num_req_dev_types) { 1048 p2p->req_dev_types = os_malloc(num_req_dev_types * 1049 WPS_DEV_TYPE_LEN); 1050 if (p2p->req_dev_types == NULL) 1051 return -1; 1052 os_memcpy(p2p->req_dev_types, req_dev_types, 1053 num_req_dev_types * WPS_DEV_TYPE_LEN); 1054 p2p->num_req_dev_types = num_req_dev_types; 1055 } 1056 1057 if (dev_id) { 1058 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN); 1059 p2p->find_dev_id = p2p->find_dev_id_buf; 1060 } else 1061 p2p->find_dev_id = NULL; 1062 1063 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1064 p2p_clear_timeout(p2p); 1065 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1066 p2p->find_type = type; 1067 p2p_device_clear_reported(p2p); 1068 p2p_set_state(p2p, P2P_SEARCH); 1069 p2p->search_delay = search_delay; 1070 p2p->in_search_delay = 0; 1071 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1072 p2p->last_p2p_find_timeout = timeout; 1073 if (timeout) 1074 eloop_register_timeout(timeout, 0, p2p_find_timeout, 1075 p2p, NULL); 1076 switch (type) { 1077 case P2P_FIND_START_WITH_FULL: 1078 case P2P_FIND_PROGRESSIVE: 1079 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0, 1080 p2p->num_req_dev_types, 1081 p2p->req_dev_types, dev_id, 1082 DEV_PW_DEFAULT); 1083 break; 1084 case P2P_FIND_ONLY_SOCIAL: 1085 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0, 1086 p2p->num_req_dev_types, 1087 p2p->req_dev_types, dev_id, 1088 DEV_PW_DEFAULT); 1089 break; 1090 default: 1091 return -1; 1092 } 1093 1094 if (res == 0) { 1095 p2p_dbg(p2p, "Running p2p_scan"); 1096 p2p->p2p_scan_running = 1; 1097 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 1098 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 1099 p2p, NULL); 1100 } else if (res == 1) { 1101 p2p_dbg(p2p, "Could not start p2p_scan at this point - will try again after previous scan completes"); 1102 res = 0; 1103 p2p_set_state(p2p, P2P_SEARCH_WHEN_READY); 1104 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1105 } else { 1106 p2p_dbg(p2p, "Failed to start p2p_scan"); 1107 p2p_set_state(p2p, P2P_IDLE); 1108 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1109 } 1110 1111 return res; 1112} 1113 1114 1115int p2p_other_scan_completed(struct p2p_data *p2p) 1116{ 1117 if (p2p->state == P2P_CONTINUE_SEARCH_WHEN_READY) { 1118 p2p_set_state(p2p, P2P_SEARCH); 1119 p2p_search(p2p); 1120 return 1; 1121 } 1122 if (p2p->state != P2P_SEARCH_WHEN_READY) 1123 return 0; 1124 p2p_dbg(p2p, "Starting pending P2P find now that previous scan was completed"); 1125 if (p2p_find(p2p, p2p->last_p2p_find_timeout, p2p->find_type, 1126 p2p->num_req_dev_types, p2p->req_dev_types, 1127 p2p->find_dev_id, p2p->search_delay) < 0) { 1128 p2p->cfg->find_stopped(p2p->cfg->cb_ctx); 1129 return 0; 1130 } 1131 return 1; 1132} 1133 1134 1135void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq) 1136{ 1137 p2p_dbg(p2p, "Stopping find"); 1138 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1139 p2p_clear_timeout(p2p); 1140 if (p2p->state == P2P_SEARCH || 1141 p2p->state == P2P_CONTINUE_SEARCH_WHEN_READY || 1142 p2p->state == P2P_SEARCH_WHEN_READY) 1143 p2p->cfg->find_stopped(p2p->cfg->cb_ctx); 1144 p2p_set_state(p2p, P2P_IDLE); 1145 p2p_free_req_dev_types(p2p); 1146 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1147 if (p2p->go_neg_peer) 1148 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1149 p2p->go_neg_peer = NULL; 1150 p2p->sd_peer = NULL; 1151 p2p->invite_peer = NULL; 1152 p2p_stop_listen_for_freq(p2p, freq); 1153} 1154 1155 1156void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq) 1157{ 1158 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) { 1159 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response"); 1160 return; 1161 } 1162 if (p2p->in_listen) { 1163 p2p->in_listen = 0; 1164 p2p_clear_timeout(p2p); 1165 } 1166 if (p2p->drv_in_listen) { 1167 /* 1168 * The driver may not deliver callback to p2p_listen_end() 1169 * when the operation gets canceled, so clear the internal 1170 * variable that is tracking driver state. 1171 */ 1172 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen); 1173 p2p->drv_in_listen = 0; 1174 } 1175 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1176} 1177 1178 1179void p2p_stop_listen(struct p2p_data *p2p) 1180{ 1181 if (p2p->state != P2P_LISTEN_ONLY) { 1182 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state."); 1183 return; 1184 } 1185 1186 p2p_stop_listen_for_freq(p2p, 0); 1187 p2p_set_state(p2p, P2P_IDLE); 1188} 1189 1190 1191void p2p_stop_find(struct p2p_data *p2p) 1192{ 1193 p2p_stop_find_for_freq(p2p, 0); 1194} 1195 1196 1197static int p2p_prepare_channel_pref(struct p2p_data *p2p, 1198 unsigned int force_freq, 1199 unsigned int pref_freq, int go) 1200{ 1201 u8 op_class, op_channel; 1202 unsigned int freq = force_freq ? force_freq : pref_freq; 1203 1204 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d", 1205 force_freq, pref_freq, go); 1206 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) { 1207 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq); 1208 return -1; 1209 } 1210 1211 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) && 1212 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class, 1213 op_channel))) { 1214 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P", 1215 freq, op_class, op_channel); 1216 return -1; 1217 } 1218 1219 p2p->op_reg_class = op_class; 1220 p2p->op_channel = op_channel; 1221 1222 if (force_freq) { 1223 p2p->channels.reg_classes = 1; 1224 p2p->channels.reg_class[0].channels = 1; 1225 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 1226 p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 1227 } else { 1228 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1229 sizeof(struct p2p_channels)); 1230 } 1231 1232 return 0; 1233} 1234 1235 1236static void p2p_prepare_channel_best(struct p2p_data *p2p) 1237{ 1238 u8 op_class, op_channel; 1239 const int op_classes_5ghz[] = { 124, 115, 0 }; 1240 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 }; 1241 const int op_classes_vht[] = { 128, 0 }; 1242 1243 p2p_dbg(p2p, "Prepare channel best"); 1244 1245 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 && 1246 p2p_supported_freq(p2p, p2p->best_freq_overall) && 1247 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel) 1248 == 0) { 1249 p2p_dbg(p2p, "Select best overall channel as operating channel preference"); 1250 p2p->op_reg_class = op_class; 1251 p2p->op_channel = op_channel; 1252 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 && 1253 p2p_supported_freq(p2p, p2p->best_freq_5) && 1254 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel) 1255 == 0) { 1256 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference"); 1257 p2p->op_reg_class = op_class; 1258 p2p->op_channel = op_channel; 1259 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 && 1260 p2p_supported_freq(p2p, p2p->best_freq_24) && 1261 p2p_freq_to_channel(p2p->best_freq_24, &op_class, 1262 &op_channel) == 0) { 1263 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference"); 1264 p2p->op_reg_class = op_class; 1265 p2p->op_channel = op_channel; 1266 } else if (p2p->cfg->num_pref_chan > 0 && 1267 p2p_channels_includes(&p2p->cfg->channels, 1268 p2p->cfg->pref_chan[0].op_class, 1269 p2p->cfg->pref_chan[0].chan)) { 1270 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference"); 1271 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class; 1272 p2p->op_channel = p2p->cfg->pref_chan[0].chan; 1273 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht, 1274 &p2p->op_reg_class, &p2p->op_channel) == 1275 0) { 1276 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference", 1277 p2p->op_reg_class, p2p->op_channel); 1278 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40, 1279 &p2p->op_reg_class, &p2p->op_channel) == 1280 0) { 1281 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference", 1282 p2p->op_reg_class, p2p->op_channel); 1283 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz, 1284 &p2p->op_reg_class, &p2p->op_channel) == 1285 0) { 1286 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference", 1287 p2p->op_reg_class, p2p->op_channel); 1288 } else { 1289 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference"); 1290 p2p->op_reg_class = p2p->cfg->op_reg_class; 1291 p2p->op_channel = p2p->cfg->op_channel; 1292 } 1293 1294 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1295 sizeof(struct p2p_channels)); 1296} 1297 1298 1299/** 1300 * p2p_prepare_channel - Select operating channel for GO Negotiation 1301 * @p2p: P2P module context from p2p_init() 1302 * @dev: Selected peer device 1303 * @force_freq: Forced frequency in MHz or 0 if not forced 1304 * @pref_freq: Preferred frequency in MHz or 0 if no preference 1305 * @go: Whether the local end will be forced to be GO 1306 * Returns: 0 on success, -1 on failure (channel not supported for P2P) 1307 * 1308 * This function is used to do initial operating channel selection for GO 1309 * Negotiation prior to having received peer information. The selected channel 1310 * may be further optimized in p2p_reselect_channel() once the peer information 1311 * is available. 1312 */ 1313int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev, 1314 unsigned int force_freq, unsigned int pref_freq, int go) 1315{ 1316 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d", 1317 force_freq, pref_freq, go); 1318 if (force_freq || pref_freq) { 1319 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) < 1320 0) 1321 return -1; 1322 } else { 1323 p2p_prepare_channel_best(p2p); 1324 } 1325 p2p_channels_dump(p2p, "prepared channels", &p2p->channels); 1326 if (go) 1327 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq); 1328 else if (!force_freq) 1329 p2p_channels_union(&p2p->channels, &p2p->cfg->cli_channels, 1330 &p2p->channels); 1331 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels); 1332 1333 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s", 1334 p2p->op_reg_class, p2p->op_channel, 1335 force_freq ? " (forced)" : ""); 1336 1337 if (force_freq) 1338 dev->flags |= P2P_DEV_FORCE_FREQ; 1339 else 1340 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1341 1342 return 0; 1343} 1344 1345 1346static void p2p_set_dev_persistent(struct p2p_device *dev, 1347 int persistent_group) 1348{ 1349 switch (persistent_group) { 1350 case 0: 1351 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP | 1352 P2P_DEV_PREFER_PERSISTENT_RECONN); 1353 break; 1354 case 1: 1355 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP; 1356 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN; 1357 break; 1358 case 2: 1359 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP | 1360 P2P_DEV_PREFER_PERSISTENT_RECONN; 1361 break; 1362 } 1363} 1364 1365 1366int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr, 1367 enum p2p_wps_method wps_method, 1368 int go_intent, const u8 *own_interface_addr, 1369 unsigned int force_freq, int persistent_group, 1370 const u8 *force_ssid, size_t force_ssid_len, 1371 int pd_before_go_neg, unsigned int pref_freq) 1372{ 1373 struct p2p_device *dev; 1374 1375 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR 1376 " GO Intent=%d Intended Interface Address=" MACSTR 1377 " wps_method=%d persistent_group=%d pd_before_go_neg=%d", 1378 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1379 wps_method, persistent_group, pd_before_go_neg); 1380 1381 dev = p2p_get_device(p2p, peer_addr); 1382 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 1383 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR, 1384 MAC2STR(peer_addr)); 1385 return -1; 1386 } 1387 1388 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, 1389 go_intent == 15) < 0) 1390 return -1; 1391 1392 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 1393 if (!(dev->info.dev_capab & 1394 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 1395 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1396 " that is in a group and is not discoverable", 1397 MAC2STR(peer_addr)); 1398 return -1; 1399 } 1400 if (dev->oper_freq <= 0) { 1401 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1402 " with incomplete information", 1403 MAC2STR(peer_addr)); 1404 return -1; 1405 } 1406 1407 /* 1408 * First, try to connect directly. If the peer does not 1409 * acknowledge frames, assume it is sleeping and use device 1410 * discoverability via the GO at that point. 1411 */ 1412 } 1413 1414 p2p->ssid_set = 0; 1415 if (force_ssid) { 1416 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1417 force_ssid, force_ssid_len); 1418 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1419 p2p->ssid_len = force_ssid_len; 1420 p2p->ssid_set = 1; 1421 } 1422 1423 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1424 dev->flags &= ~P2P_DEV_USER_REJECTED; 1425 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 1426 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1427 if (pd_before_go_neg) 1428 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG; 1429 else { 1430 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG; 1431 /* 1432 * Assign dialog token and tie breaker here to use the same 1433 * values in each retry within the same GO Negotiation exchange. 1434 */ 1435 dev->dialog_token++; 1436 if (dev->dialog_token == 0) 1437 dev->dialog_token = 1; 1438 dev->tie_breaker = p2p->next_tie_breaker; 1439 p2p->next_tie_breaker = !p2p->next_tie_breaker; 1440 } 1441 dev->connect_reqs = 0; 1442 dev->go_neg_req_sent = 0; 1443 dev->go_state = UNKNOWN_GO; 1444 p2p_set_dev_persistent(dev, persistent_group); 1445 p2p->go_intent = go_intent; 1446 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1447 1448 if (p2p->state != P2P_IDLE) 1449 p2p_stop_find(p2p); 1450 1451 if (p2p->after_scan_tx) { 1452 /* 1453 * We need to drop the pending frame to avoid issues with the 1454 * new GO Negotiation, e.g., when the pending frame was from a 1455 * previous attempt at starting a GO Negotiation. 1456 */ 1457 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion"); 1458 os_free(p2p->after_scan_tx); 1459 p2p->after_scan_tx = NULL; 1460 } 1461 1462 dev->wps_method = wps_method; 1463 dev->status = P2P_SC_SUCCESS; 1464 1465 if (p2p->p2p_scan_running) { 1466 p2p_dbg(p2p, "p2p_scan running - delay connect send"); 1467 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT; 1468 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN); 1469 return 0; 1470 } 1471 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1472 1473 return p2p_connect_send(p2p, dev); 1474} 1475 1476 1477int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr, 1478 enum p2p_wps_method wps_method, 1479 int go_intent, const u8 *own_interface_addr, 1480 unsigned int force_freq, int persistent_group, 1481 const u8 *force_ssid, size_t force_ssid_len, 1482 unsigned int pref_freq) 1483{ 1484 struct p2p_device *dev; 1485 1486 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR 1487 " GO Intent=%d Intended Interface Address=" MACSTR 1488 " wps_method=%d persistent_group=%d", 1489 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1490 wps_method, persistent_group); 1491 1492 dev = p2p_get_device(p2p, peer_addr); 1493 if (dev == NULL) { 1494 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR, 1495 MAC2STR(peer_addr)); 1496 return -1; 1497 } 1498 1499 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent == 1500 15) < 0) 1501 return -1; 1502 1503 p2p->ssid_set = 0; 1504 if (force_ssid) { 1505 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1506 force_ssid, force_ssid_len); 1507 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1508 p2p->ssid_len = force_ssid_len; 1509 p2p->ssid_set = 1; 1510 } 1511 1512 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1513 dev->flags &= ~P2P_DEV_USER_REJECTED; 1514 dev->go_neg_req_sent = 0; 1515 dev->go_state = UNKNOWN_GO; 1516 p2p_set_dev_persistent(dev, persistent_group); 1517 p2p->go_intent = go_intent; 1518 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1519 1520 dev->wps_method = wps_method; 1521 dev->status = P2P_SC_SUCCESS; 1522 1523 return 0; 1524} 1525 1526 1527void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr, 1528 struct p2p_device *dev, struct p2p_message *msg) 1529{ 1530 os_get_time(&dev->last_seen); 1531 1532 p2p_copy_wps_info(p2p, dev, 0, msg); 1533 1534 if (msg->listen_channel) { 1535 int freq; 1536 freq = p2p_channel_to_freq(msg->listen_channel[3], 1537 msg->listen_channel[4]); 1538 if (freq < 0) { 1539 p2p_dbg(p2p, "Unknown peer Listen channel: " 1540 "country=%c%c(0x%02x) reg_class=%u channel=%u", 1541 msg->listen_channel[0], 1542 msg->listen_channel[1], 1543 msg->listen_channel[2], 1544 msg->listen_channel[3], 1545 msg->listen_channel[4]); 1546 } else { 1547 p2p_dbg(p2p, "Update peer " MACSTR 1548 " Listen channel: %u -> %u MHz", 1549 MAC2STR(dev->info.p2p_device_addr), 1550 dev->listen_freq, freq); 1551 dev->listen_freq = freq; 1552 } 1553 } 1554 1555 if (msg->wfd_subelems) { 1556 wpabuf_free(dev->info.wfd_subelems); 1557 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems); 1558 } 1559 1560 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 1561 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 1562 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request"); 1563 } else { 1564 p2p_dbg(p2p, "Created device entry based on GO Neg Req: " 1565 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' " 1566 "listen_freq=%d", 1567 MAC2STR(dev->info.p2p_device_addr), 1568 dev->info.dev_capab, dev->info.group_capab, 1569 dev->info.device_name, dev->listen_freq); 1570 } 1571 1572 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY; 1573 1574 if (dev->flags & P2P_DEV_USER_REJECTED) { 1575 p2p_dbg(p2p, "Do not report rejected device"); 1576 return; 1577 } 1578 1579 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 1580 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 1581 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 1582} 1583 1584 1585void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len) 1586{ 1587 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 1588 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2); 1589 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2], 1590 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len); 1591 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len; 1592} 1593 1594 1595int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params) 1596{ 1597 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len); 1598 p2p_random(params->passphrase, 8); 1599 return 0; 1600} 1601 1602 1603void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer) 1604{ 1605 struct p2p_go_neg_results res; 1606 int go = peer->go_state == LOCAL_GO; 1607 struct p2p_channels intersection; 1608 int freqs; 1609 size_t i, j; 1610 1611 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)", 1612 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer"); 1613 1614 os_memset(&res, 0, sizeof(res)); 1615 res.role_go = go; 1616 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 1617 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 1618 res.wps_method = peer->wps_method; 1619 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 1620 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 1621 res.persistent_group = 2; 1622 else 1623 res.persistent_group = 1; 1624 } 1625 1626 if (go) { 1627 /* Setup AP mode for WPS provisioning */ 1628 res.freq = p2p_channel_to_freq(p2p->op_reg_class, 1629 p2p->op_channel); 1630 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1631 res.ssid_len = p2p->ssid_len; 1632 p2p_random(res.passphrase, 8); 1633 } else { 1634 res.freq = peer->oper_freq; 1635 if (p2p->ssid_len) { 1636 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1637 res.ssid_len = p2p->ssid_len; 1638 } 1639 } 1640 1641 p2p_channels_dump(p2p, "own channels", &p2p->channels); 1642 p2p_channels_dump(p2p, "peer channels", &peer->channels); 1643 p2p_channels_intersect(&p2p->channels, &peer->channels, 1644 &intersection); 1645 if (go) { 1646 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq); 1647 p2p_channels_dump(p2p, "intersection after no-GO removal", 1648 &intersection); 1649 } 1650 freqs = 0; 1651 for (i = 0; i < intersection.reg_classes; i++) { 1652 struct p2p_reg_class *c = &intersection.reg_class[i]; 1653 if (freqs + 1 == P2P_MAX_CHANNELS) 1654 break; 1655 for (j = 0; j < c->channels; j++) { 1656 int freq; 1657 if (freqs + 1 == P2P_MAX_CHANNELS) 1658 break; 1659 freq = p2p_channel_to_freq(c->reg_class, c->channel[j]); 1660 if (freq < 0) 1661 continue; 1662 res.freq_list[freqs++] = freq; 1663 } 1664 } 1665 1666 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout; 1667 1668 p2p_clear_timeout(p2p); 1669 p2p->ssid_set = 0; 1670 peer->go_neg_req_sent = 0; 1671 peer->wps_method = WPS_NOT_READY; 1672 1673 p2p_set_state(p2p, P2P_PROVISIONING); 1674 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 1675} 1676 1677 1678static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa, 1679 const u8 *data, size_t len, int rx_freq) 1680{ 1681 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa)); 1682 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len); 1683 1684 if (len < 1) 1685 return; 1686 1687 switch (data[0]) { 1688 case P2P_GO_NEG_REQ: 1689 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq); 1690 break; 1691 case P2P_GO_NEG_RESP: 1692 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq); 1693 break; 1694 case P2P_GO_NEG_CONF: 1695 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1); 1696 break; 1697 case P2P_INVITATION_REQ: 1698 p2p_process_invitation_req(p2p, sa, data + 1, len - 1, 1699 rx_freq); 1700 break; 1701 case P2P_INVITATION_RESP: 1702 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 1703 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1); 1704 break; 1705 case P2P_PROV_DISC_REQ: 1706 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1707 break; 1708 case P2P_PROV_DISC_RESP: 1709 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1); 1710 break; 1711 case P2P_DEV_DISC_REQ: 1712 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1713 break; 1714 case P2P_DEV_DISC_RESP: 1715 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1); 1716 break; 1717 default: 1718 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d", 1719 data[0]); 1720 break; 1721 } 1722} 1723 1724 1725static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, 1726 const u8 *sa, const u8 *bssid, const u8 *data, 1727 size_t len, int freq) 1728{ 1729 if (len < 1) 1730 return; 1731 1732 switch (data[0]) { 1733 case WLAN_PA_VENDOR_SPECIFIC: 1734 data++; 1735 len--; 1736 if (len < 3) 1737 return; 1738 if (WPA_GET_BE24(data) != OUI_WFA) 1739 return; 1740 1741 data += 3; 1742 len -= 3; 1743 if (len < 1) 1744 return; 1745 1746 if (*data != P2P_OUI_TYPE) 1747 return; 1748 1749 p2p_rx_p2p_action(p2p, sa, data + 1, len - 1, freq); 1750 break; 1751 case WLAN_PA_GAS_INITIAL_REQ: 1752 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq); 1753 break; 1754 case WLAN_PA_GAS_INITIAL_RESP: 1755 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq); 1756 break; 1757 case WLAN_PA_GAS_COMEBACK_REQ: 1758 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq); 1759 break; 1760 case WLAN_PA_GAS_COMEBACK_RESP: 1761 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq); 1762 break; 1763 } 1764} 1765 1766 1767void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa, 1768 const u8 *bssid, u8 category, 1769 const u8 *data, size_t len, int freq) 1770{ 1771 if (category == WLAN_ACTION_PUBLIC) { 1772 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq); 1773 return; 1774 } 1775 1776 if (category != WLAN_ACTION_VENDOR_SPECIFIC) 1777 return; 1778 1779 if (len < 4) 1780 return; 1781 1782 if (WPA_GET_BE24(data) != OUI_WFA) 1783 return; 1784 data += 3; 1785 len -= 3; 1786 1787 if (*data != P2P_OUI_TYPE) 1788 return; 1789 data++; 1790 len--; 1791 1792 /* P2P action frame */ 1793 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa)); 1794 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len); 1795 1796 if (len < 1) 1797 return; 1798 switch (data[0]) { 1799 case P2P_NOA: 1800 p2p_dbg(p2p, "Received P2P Action - Notice of Absence"); 1801 /* TODO */ 1802 break; 1803 case P2P_PRESENCE_REQ: 1804 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq); 1805 break; 1806 case P2P_PRESENCE_RESP: 1807 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1); 1808 break; 1809 case P2P_GO_DISC_REQ: 1810 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq); 1811 break; 1812 default: 1813 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]); 1814 break; 1815 } 1816} 1817 1818 1819static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx) 1820{ 1821 struct p2p_data *p2p = eloop_ctx; 1822 if (p2p->go_neg_peer == NULL) 1823 return; 1824 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1825 p2p->go_neg_peer->status = P2P_SC_SUCCESS; 1826 p2p_connect_send(p2p, p2p->go_neg_peer); 1827} 1828 1829 1830static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx) 1831{ 1832 struct p2p_data *p2p = eloop_ctx; 1833 if (p2p->invite_peer == NULL) 1834 return; 1835 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1836 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr); 1837} 1838 1839 1840static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr, 1841 const u8 *ie, size_t ie_len) 1842{ 1843 struct p2p_message msg; 1844 struct p2p_device *dev; 1845 1846 os_memset(&msg, 0, sizeof(msg)); 1847 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL) 1848 { 1849 p2p_parse_free(&msg); 1850 return; /* not a P2P probe */ 1851 } 1852 1853 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 1854 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 1855 != 0) { 1856 /* The Probe Request is not part of P2P Device Discovery. It is 1857 * not known whether the source address of the frame is the P2P 1858 * Device Address or P2P Interface Address. Do not add a new 1859 * peer entry based on this frames. 1860 */ 1861 p2p_parse_free(&msg); 1862 return; 1863 } 1864 1865 dev = p2p_get_device(p2p, addr); 1866 if (dev) { 1867 if (dev->country[0] == 0 && msg.listen_channel) 1868 os_memcpy(dev->country, msg.listen_channel, 3); 1869 os_get_time(&dev->last_seen); 1870 p2p_parse_free(&msg); 1871 return; /* already known */ 1872 } 1873 1874 dev = p2p_create_device(p2p, addr); 1875 if (dev == NULL) { 1876 p2p_parse_free(&msg); 1877 return; 1878 } 1879 1880 os_get_time(&dev->last_seen); 1881 dev->flags |= P2P_DEV_PROBE_REQ_ONLY; 1882 1883 if (msg.listen_channel) { 1884 os_memcpy(dev->country, msg.listen_channel, 3); 1885 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3], 1886 msg.listen_channel[4]); 1887 } 1888 1889 p2p_copy_wps_info(p2p, dev, 1, &msg); 1890 1891 if (msg.wfd_subelems) { 1892 wpabuf_free(dev->info.wfd_subelems); 1893 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 1894 } 1895 1896 p2p_parse_free(&msg); 1897 1898 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR 1899 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d", 1900 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab, 1901 dev->info.group_capab, dev->info.device_name, 1902 dev->listen_freq); 1903} 1904 1905 1906struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p, 1907 const u8 *addr, 1908 struct p2p_message *msg) 1909{ 1910 struct p2p_device *dev; 1911 1912 dev = p2p_get_device(p2p, addr); 1913 if (dev) { 1914 os_get_time(&dev->last_seen); 1915 return dev; /* already known */ 1916 } 1917 1918 dev = p2p_create_device(p2p, addr); 1919 if (dev == NULL) 1920 return NULL; 1921 1922 p2p_add_dev_info(p2p, addr, dev, msg); 1923 1924 return dev; 1925} 1926 1927 1928static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type) 1929{ 1930 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0) 1931 return 1; 1932 if (os_memcmp(dev_type, req_dev_type, 2) == 0 && 1933 WPA_GET_BE32(&req_dev_type[2]) == 0 && 1934 WPA_GET_BE16(&req_dev_type[6]) == 0) 1935 return 1; /* Category match with wildcard OUI/sub-category */ 1936 return 0; 1937} 1938 1939 1940int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[], 1941 size_t num_req_dev_type) 1942{ 1943 size_t i; 1944 for (i = 0; i < num_req_dev_type; i++) { 1945 if (dev_type_match(dev_type, req_dev_type[i])) 1946 return 1; 1947 } 1948 return 0; 1949} 1950 1951 1952/** 1953 * p2p_match_dev_type - Match local device type with requested type 1954 * @p2p: P2P module context from p2p_init() 1955 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) 1956 * Returns: 1 on match, 0 on mismatch 1957 * 1958 * This function can be used to match the Requested Device Type attribute in 1959 * WPS IE with the local device types for deciding whether to reply to a Probe 1960 * Request frame. 1961 */ 1962int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps) 1963{ 1964 struct wps_parse_attr attr; 1965 size_t i; 1966 1967 if (wps_parse_msg(wps, &attr)) 1968 return 1; /* assume no Requested Device Type attributes */ 1969 1970 if (attr.num_req_dev_type == 0) 1971 return 1; /* no Requested Device Type attributes -> match */ 1972 1973 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type, 1974 attr.num_req_dev_type)) 1975 return 1; /* Own Primary Device Type matches */ 1976 1977 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) 1978 if (dev_type_list_match(p2p->cfg->sec_dev_type[i], 1979 attr.req_dev_type, 1980 attr.num_req_dev_type)) 1981 return 1; /* Own Secondary Device Type matches */ 1982 1983 /* No matching device type found */ 1984 return 0; 1985} 1986 1987 1988struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p) 1989{ 1990 struct wpabuf *buf; 1991 u8 *len; 1992 int pw_id = -1; 1993 size_t extra = 0; 1994 1995#ifdef CONFIG_WIFI_DISPLAY 1996 if (p2p->wfd_ie_probe_resp) 1997 extra = wpabuf_len(p2p->wfd_ie_probe_resp); 1998#endif /* CONFIG_WIFI_DISPLAY */ 1999 2000 buf = wpabuf_alloc(1000 + extra); 2001 if (buf == NULL) 2002 return NULL; 2003 2004 if (p2p->go_neg_peer) { 2005 /* Advertise immediate availability of WPS credential */ 2006 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method); 2007 } 2008 2009 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) { 2010 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response"); 2011 wpabuf_free(buf); 2012 return NULL; 2013 } 2014 2015#ifdef CONFIG_WIFI_DISPLAY 2016 if (p2p->wfd_ie_probe_resp) 2017 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp); 2018#endif /* CONFIG_WIFI_DISPLAY */ 2019 2020 /* P2P IE */ 2021 len = p2p_buf_add_ie_hdr(buf); 2022 p2p_buf_add_capability(buf, p2p->dev_capab & 2023 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2024 if (p2p->ext_listen_interval) 2025 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 2026 p2p->ext_listen_interval); 2027 p2p_buf_add_device_info(buf, p2p, NULL); 2028 p2p_buf_update_ie_hdr(buf, len); 2029 2030 return buf; 2031} 2032 2033 2034static enum p2p_probe_req_status 2035p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2036 const u8 *bssid, const u8 *ie, size_t ie_len) 2037{ 2038 struct ieee802_11_elems elems; 2039 struct wpabuf *buf; 2040 struct ieee80211_mgmt *resp; 2041 struct p2p_message msg; 2042 struct wpabuf *ies; 2043 2044 if (!p2p->in_listen || !p2p->drv_in_listen) { 2045 /* not in Listen state - ignore Probe Request */ 2046 return P2P_PREQ_NOT_LISTEN; 2047 } 2048 2049 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) == 2050 ParseFailed) { 2051 /* Ignore invalid Probe Request frames */ 2052 return P2P_PREQ_MALFORMED; 2053 } 2054 2055 if (elems.p2p == NULL) { 2056 /* not a P2P probe - ignore it */ 2057 return P2P_PREQ_NOT_P2P; 2058 } 2059 2060 if (dst && !is_broadcast_ether_addr(dst) && 2061 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2062 /* Not sent to the broadcast address or our P2P Device Address 2063 */ 2064 return P2P_PREQ_NOT_PROCESSED; 2065 } 2066 2067 if (bssid && !is_broadcast_ether_addr(bssid)) { 2068 /* Not sent to the Wildcard BSSID */ 2069 return P2P_PREQ_NOT_PROCESSED; 2070 } 2071 2072 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN || 2073 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) != 2074 0) { 2075 /* not using P2P Wildcard SSID - ignore */ 2076 return P2P_PREQ_NOT_PROCESSED; 2077 } 2078 2079 if (supp_rates_11b_only(&elems)) { 2080 /* Indicates support for 11b rates only */ 2081 return P2P_PREQ_NOT_P2P; 2082 } 2083 2084 os_memset(&msg, 0, sizeof(msg)); 2085 if (p2p_parse_ies(ie, ie_len, &msg) < 0) { 2086 /* Could not parse P2P attributes */ 2087 return P2P_PREQ_NOT_P2P; 2088 } 2089 2090 if (msg.device_id && 2091 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2092 /* Device ID did not match */ 2093 p2p_parse_free(&msg); 2094 return P2P_PREQ_NOT_PROCESSED; 2095 } 2096 2097 /* Check Requested Device Type match */ 2098 if (msg.wps_attributes && 2099 !p2p_match_dev_type(p2p, msg.wps_attributes)) { 2100 /* No match with Requested Device Type */ 2101 p2p_parse_free(&msg); 2102 return P2P_PREQ_NOT_PROCESSED; 2103 } 2104 p2p_parse_free(&msg); 2105 2106 if (!p2p->cfg->send_probe_resp) { 2107 /* Response generated elsewhere */ 2108 return P2P_PREQ_NOT_PROCESSED; 2109 } 2110 2111 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state"); 2112 2113 /* 2114 * We do not really have a specific BSS that this frame is advertising, 2115 * so build a frame that has some information in valid format. This is 2116 * really only used for discovery purposes, not to learn exact BSS 2117 * parameters. 2118 */ 2119 ies = p2p_build_probe_resp_ies(p2p); 2120 if (ies == NULL) 2121 return P2P_PREQ_NOT_PROCESSED; 2122 2123 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 2124 if (buf == NULL) { 2125 wpabuf_free(ies); 2126 return P2P_PREQ_NOT_PROCESSED; 2127 } 2128 2129 resp = NULL; 2130 resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp); 2131 2132 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 2133 (WLAN_FC_STYPE_PROBE_RESP << 4)); 2134 os_memcpy(resp->da, addr, ETH_ALEN); 2135 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN); 2136 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN); 2137 resp->u.probe_resp.beacon_int = host_to_le16(100); 2138 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 2139 resp->u.probe_resp.capab_info = 2140 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE | 2141 WLAN_CAPABILITY_PRIVACY | 2142 WLAN_CAPABILITY_SHORT_SLOT_TIME); 2143 2144 wpabuf_put_u8(buf, WLAN_EID_SSID); 2145 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN); 2146 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 2147 2148 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES); 2149 wpabuf_put_u8(buf, 8); 2150 wpabuf_put_u8(buf, (60 / 5) | 0x80); 2151 wpabuf_put_u8(buf, 90 / 5); 2152 wpabuf_put_u8(buf, (120 / 5) | 0x80); 2153 wpabuf_put_u8(buf, 180 / 5); 2154 wpabuf_put_u8(buf, (240 / 5) | 0x80); 2155 wpabuf_put_u8(buf, 360 / 5); 2156 wpabuf_put_u8(buf, 480 / 5); 2157 wpabuf_put_u8(buf, 540 / 5); 2158 2159 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS); 2160 wpabuf_put_u8(buf, 1); 2161 wpabuf_put_u8(buf, p2p->cfg->channel); 2162 2163 wpabuf_put_buf(buf, ies); 2164 wpabuf_free(ies); 2165 2166 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf); 2167 2168 wpabuf_free(buf); 2169 2170 return P2P_PREQ_NOT_PROCESSED; 2171} 2172 2173 2174enum p2p_probe_req_status 2175p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2176 const u8 *bssid, const u8 *ie, size_t ie_len) 2177{ 2178 enum p2p_probe_req_status res; 2179 2180 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len); 2181 2182 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len); 2183 2184 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) && 2185 p2p->go_neg_peer && 2186 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN) 2187 == 0 && 2188 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 2189 /* Received a Probe Request from GO Negotiation peer */ 2190 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout"); 2191 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2192 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL); 2193 return P2P_PREQ_PROCESSED; 2194 } 2195 2196 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) && 2197 p2p->invite_peer && 2198 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN) 2199 == 0) { 2200 /* Received a Probe Request from Invite peer */ 2201 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout"); 2202 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL); 2203 return P2P_PREQ_PROCESSED; 2204 } 2205 2206 return res; 2207} 2208 2209 2210static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid, 2211 u8 *buf, size_t len, struct wpabuf *p2p_ie) 2212{ 2213 struct wpabuf *tmp; 2214 u8 *lpos; 2215 size_t tmplen; 2216 int res; 2217 u8 group_capab; 2218 2219 if (p2p_ie == NULL) 2220 return 0; /* WLAN AP is not a P2P manager */ 2221 2222 /* 2223 * (Re)Association Request - P2P IE 2224 * P2P Capability attribute (shall be present) 2225 * P2P Interface attribute (present if concurrent device and 2226 * P2P Management is enabled) 2227 */ 2228 tmp = wpabuf_alloc(200); 2229 if (tmp == NULL) 2230 return -1; 2231 2232 lpos = p2p_buf_add_ie_hdr(tmp); 2233 group_capab = 0; 2234 if (p2p->num_groups > 0) { 2235 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; 2236 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2237 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) && 2238 p2p->cross_connect) 2239 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 2240 } 2241 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab); 2242 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2243 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED)) 2244 p2p_buf_add_p2p_interface(tmp, p2p); 2245 p2p_buf_update_ie_hdr(tmp, lpos); 2246 2247 tmplen = wpabuf_len(tmp); 2248 if (tmplen > len) 2249 res = -1; 2250 else { 2251 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2252 res = tmplen; 2253 } 2254 wpabuf_free(tmp); 2255 2256 return res; 2257} 2258 2259 2260int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf, 2261 size_t len, int p2p_group, struct wpabuf *p2p_ie) 2262{ 2263 struct wpabuf *tmp; 2264 u8 *lpos; 2265 struct p2p_device *peer; 2266 size_t tmplen; 2267 int res; 2268 size_t extra = 0; 2269 2270 if (!p2p_group) 2271 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie); 2272 2273#ifdef CONFIG_WIFI_DISPLAY 2274 if (p2p->wfd_ie_assoc_req) 2275 extra = wpabuf_len(p2p->wfd_ie_assoc_req); 2276#endif /* CONFIG_WIFI_DISPLAY */ 2277 2278 /* 2279 * (Re)Association Request - P2P IE 2280 * P2P Capability attribute (shall be present) 2281 * Extended Listen Timing (may be present) 2282 * P2P Device Info attribute (shall be present) 2283 */ 2284 tmp = wpabuf_alloc(200 + extra); 2285 if (tmp == NULL) 2286 return -1; 2287 2288#ifdef CONFIG_WIFI_DISPLAY 2289 if (p2p->wfd_ie_assoc_req) 2290 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req); 2291#endif /* CONFIG_WIFI_DISPLAY */ 2292 2293 peer = bssid ? p2p_get_device(p2p, bssid) : NULL; 2294 2295 lpos = p2p_buf_add_ie_hdr(tmp); 2296 p2p_buf_add_capability(tmp, p2p->dev_capab, 0); 2297 if (p2p->ext_listen_interval) 2298 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period, 2299 p2p->ext_listen_interval); 2300 p2p_buf_add_device_info(tmp, p2p, peer); 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_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) 2317{ 2318 struct wpabuf *p2p_ie; 2319 int ret; 2320 2321 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); 2322 if (p2p_ie == NULL) 2323 return 0; 2324 2325 ret = p2p_attr_text(p2p_ie, buf, end); 2326 wpabuf_free(p2p_ie); 2327 return ret; 2328} 2329 2330 2331int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr) 2332{ 2333 struct p2p_message msg; 2334 2335 os_memset(&msg, 0, sizeof(msg)); 2336 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 2337 return -1; 2338 2339 if (msg.p2p_device_addr) { 2340 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); 2341 return 0; 2342 } else if (msg.device_id) { 2343 os_memcpy(dev_addr, msg.device_id, ETH_ALEN); 2344 return 0; 2345 } 2346 return -1; 2347} 2348 2349 2350int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr) 2351{ 2352 struct wpabuf *p2p_ie; 2353 int ret; 2354 2355 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 2356 P2P_IE_VENDOR_TYPE); 2357 if (p2p_ie == NULL) 2358 return -1; 2359 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr); 2360 wpabuf_free(p2p_ie); 2361 return ret; 2362} 2363 2364 2365static void p2p_clear_go_neg(struct p2p_data *p2p) 2366{ 2367 p2p->go_neg_peer = NULL; 2368 p2p_clear_timeout(p2p); 2369 p2p_set_state(p2p, P2P_IDLE); 2370} 2371 2372 2373void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr) 2374{ 2375 if (p2p->go_neg_peer == NULL) { 2376 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification"); 2377 return; /* No pending Group Formation */ 2378 } 2379 2380 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) != 2381 0) { 2382 p2p_dbg(p2p, "Ignore WPS registration success notification for " 2383 MACSTR " (GO Negotiation peer " MACSTR ")", 2384 MAC2STR(mac_addr), 2385 MAC2STR(p2p->go_neg_peer->intended_addr)); 2386 return; /* Ignore unexpected peer address */ 2387 } 2388 2389 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR, 2390 MAC2STR(mac_addr)); 2391 2392 p2p_clear_go_neg(p2p); 2393} 2394 2395 2396void p2p_group_formation_failed(struct p2p_data *p2p) 2397{ 2398 if (p2p->go_neg_peer == NULL) { 2399 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification"); 2400 return; /* No pending Group Formation */ 2401 } 2402 2403 p2p_dbg(p2p, "Group Formation failed with " MACSTR, 2404 MAC2STR(p2p->go_neg_peer->intended_addr)); 2405 2406 p2p_clear_go_neg(p2p); 2407} 2408 2409 2410struct p2p_data * p2p_init(const struct p2p_config *cfg) 2411{ 2412 struct p2p_data *p2p; 2413 2414 if (cfg->max_peers < 1) 2415 return NULL; 2416 2417 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg)); 2418 if (p2p == NULL) 2419 return NULL; 2420 p2p->cfg = (struct p2p_config *) (p2p + 1); 2421 os_memcpy(p2p->cfg, cfg, sizeof(*cfg)); 2422 if (cfg->dev_name) 2423 p2p->cfg->dev_name = os_strdup(cfg->dev_name); 2424 if (cfg->manufacturer) 2425 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer); 2426 if (cfg->model_name) 2427 p2p->cfg->model_name = os_strdup(cfg->model_name); 2428 if (cfg->model_number) 2429 p2p->cfg->model_number = os_strdup(cfg->model_number); 2430 if (cfg->serial_number) 2431 p2p->cfg->serial_number = os_strdup(cfg->serial_number); 2432 if (cfg->pref_chan) { 2433 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan * 2434 sizeof(struct p2p_channel)); 2435 if (p2p->cfg->pref_chan) { 2436 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan, 2437 cfg->num_pref_chan * 2438 sizeof(struct p2p_channel)); 2439 } else 2440 p2p->cfg->num_pref_chan = 0; 2441 } 2442 2443#ifdef ANDROID_P2P 2444 /* 100ms listen time is too less to receive the response frames in some scenarios 2445 * increasing min listen time to 200ms. 2446 */ 2447 p2p->min_disc_int = 2; 2448 /* SD_FAIR_POLICY: Initializing the SD current serviced pointer to NULL */ 2449 p2p->sd_dev_list = NULL; 2450#else 2451 p2p->min_disc_int = 1; 2452#endif 2453 p2p->max_disc_int = 3; 2454 p2p->max_disc_tu = -1; 2455 2456 os_get_random(&p2p->next_tie_breaker, 1); 2457 p2p->next_tie_breaker &= 0x01; 2458 if (cfg->sd_request) 2459 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 2460 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE; 2461 if (cfg->concurrent_operations) 2462 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER; 2463 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 2464 2465 dl_list_init(&p2p->devices); 2466 2467 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 2468 p2p_expiration_timeout, p2p, NULL); 2469 2470 p2p->go_timeout = 100; 2471 p2p->client_timeout = 20; 2472 2473 p2p_dbg(p2p, "initialized"); 2474 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 2475 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 2476 2477 return p2p; 2478} 2479 2480 2481void p2p_deinit(struct p2p_data *p2p) 2482{ 2483#ifdef CONFIG_WIFI_DISPLAY 2484 wpabuf_free(p2p->wfd_ie_beacon); 2485 wpabuf_free(p2p->wfd_ie_probe_req); 2486 wpabuf_free(p2p->wfd_ie_probe_resp); 2487 wpabuf_free(p2p->wfd_ie_assoc_req); 2488 wpabuf_free(p2p->wfd_ie_invitation); 2489 wpabuf_free(p2p->wfd_ie_prov_disc_req); 2490 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 2491 wpabuf_free(p2p->wfd_ie_go_neg); 2492 wpabuf_free(p2p->wfd_dev_info); 2493 wpabuf_free(p2p->wfd_assoc_bssid); 2494 wpabuf_free(p2p->wfd_coupled_sink_info); 2495#endif /* CONFIG_WIFI_DISPLAY */ 2496 2497 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL); 2498 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 2499 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2500 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2501 p2p_flush(p2p); 2502 p2p_free_req_dev_types(p2p); 2503 os_free(p2p->cfg->dev_name); 2504 os_free(p2p->cfg->manufacturer); 2505 os_free(p2p->cfg->model_name); 2506 os_free(p2p->cfg->model_number); 2507 os_free(p2p->cfg->serial_number); 2508 os_free(p2p->cfg->pref_chan); 2509 os_free(p2p->groups); 2510 wpabuf_free(p2p->sd_resp); 2511 os_free(p2p->after_scan_tx); 2512 p2p_remove_wps_vendor_extensions(p2p); 2513 os_free(p2p->no_go_freq.range); 2514 os_free(p2p); 2515} 2516 2517 2518void p2p_flush(struct p2p_data *p2p) 2519{ 2520 struct p2p_device *dev, *prev; 2521 p2p_stop_find(p2p); 2522 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device, 2523 list) { 2524 dl_list_del(&dev->list); 2525 p2p_device_free(p2p, dev); 2526 } 2527#ifdef ANDROID_P2P 2528 /* SD_FAIR_POLICY: Initializing the SD current serviced pointer to NULL */ 2529 p2p->sd_dev_list = NULL; 2530#endif 2531 p2p_free_sd_queries(p2p); 2532 os_free(p2p->after_scan_tx); 2533 p2p->after_scan_tx = NULL; 2534} 2535 2536 2537int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr) 2538{ 2539 struct p2p_device *dev; 2540 2541 dev = p2p_get_device(p2p, addr); 2542 if (dev == NULL) 2543 return -1; 2544 2545 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr)); 2546 2547 if (p2p->go_neg_peer == dev) 2548 p2p->go_neg_peer = NULL; 2549 2550 dev->wps_method = WPS_NOT_READY; 2551 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 2552 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 2553 2554 /* Check if after_scan_tx is for this peer. If so free it */ 2555 if (p2p->after_scan_tx && 2556 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) { 2557 os_free(p2p->after_scan_tx); 2558 p2p->after_scan_tx = NULL; 2559 } 2560 2561 return 0; 2562} 2563 2564 2565int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name) 2566{ 2567 os_free(p2p->cfg->dev_name); 2568 if (dev_name) { 2569 p2p->cfg->dev_name = os_strdup(dev_name); 2570 if (p2p->cfg->dev_name == NULL) 2571 return -1; 2572 } else 2573 p2p->cfg->dev_name = NULL; 2574 return 0; 2575} 2576 2577 2578int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer) 2579{ 2580 os_free(p2p->cfg->manufacturer); 2581 p2p->cfg->manufacturer = NULL; 2582 if (manufacturer) { 2583 p2p->cfg->manufacturer = os_strdup(manufacturer); 2584 if (p2p->cfg->manufacturer == NULL) 2585 return -1; 2586 } 2587 2588 return 0; 2589} 2590 2591 2592int p2p_set_model_name(struct p2p_data *p2p, const char *model_name) 2593{ 2594 os_free(p2p->cfg->model_name); 2595 p2p->cfg->model_name = NULL; 2596 if (model_name) { 2597 p2p->cfg->model_name = os_strdup(model_name); 2598 if (p2p->cfg->model_name == NULL) 2599 return -1; 2600 } 2601 2602 return 0; 2603} 2604 2605 2606int p2p_set_model_number(struct p2p_data *p2p, const char *model_number) 2607{ 2608 os_free(p2p->cfg->model_number); 2609 p2p->cfg->model_number = NULL; 2610 if (model_number) { 2611 p2p->cfg->model_number = os_strdup(model_number); 2612 if (p2p->cfg->model_number == NULL) 2613 return -1; 2614 } 2615 2616 return 0; 2617} 2618 2619 2620int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number) 2621{ 2622 os_free(p2p->cfg->serial_number); 2623 p2p->cfg->serial_number = NULL; 2624 if (serial_number) { 2625 p2p->cfg->serial_number = os_strdup(serial_number); 2626 if (p2p->cfg->serial_number == NULL) 2627 return -1; 2628 } 2629 2630 return 0; 2631} 2632 2633 2634void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods) 2635{ 2636 p2p->cfg->config_methods = config_methods; 2637} 2638 2639 2640void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid) 2641{ 2642 os_memcpy(p2p->cfg->uuid, uuid, 16); 2643} 2644 2645 2646int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type) 2647{ 2648 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8); 2649 return 0; 2650} 2651 2652 2653int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8], 2654 size_t num_dev_types) 2655{ 2656 if (num_dev_types > P2P_SEC_DEVICE_TYPES) 2657 num_dev_types = P2P_SEC_DEVICE_TYPES; 2658 p2p->cfg->num_sec_dev_types = num_dev_types; 2659 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8); 2660 return 0; 2661} 2662 2663 2664void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p) 2665{ 2666 int i; 2667 2668 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2669 wpabuf_free(p2p->wps_vendor_ext[i]); 2670 p2p->wps_vendor_ext[i] = NULL; 2671 } 2672} 2673 2674 2675int p2p_add_wps_vendor_extension(struct p2p_data *p2p, 2676 const struct wpabuf *vendor_ext) 2677{ 2678 int i; 2679 2680 if (vendor_ext == NULL) 2681 return -1; 2682 2683 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2684 if (p2p->wps_vendor_ext[i] == NULL) 2685 break; 2686 } 2687 if (i >= P2P_MAX_WPS_VENDOR_EXT) 2688 return -1; 2689 2690 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext); 2691 if (p2p->wps_vendor_ext[i] == NULL) 2692 return -1; 2693 2694 return 0; 2695} 2696 2697 2698int p2p_set_country(struct p2p_data *p2p, const char *country) 2699{ 2700 os_memcpy(p2p->cfg->country, country, 3); 2701 return 0; 2702} 2703 2704 2705void p2p_continue_find(struct p2p_data *p2p) 2706{ 2707 struct p2p_device *dev; 2708#ifdef ANDROID_P2P 2709 int skip=1; 2710#endif 2711 p2p_set_state(p2p, P2P_SEARCH); 2712 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2713#ifdef ANDROID_P2P 2714 /* SD_FAIR_POLICY: We need to give chance to all devices in the device list 2715 * There may be a scenario, where a particular peer device have 2716 * not registered any query response. When we send a SD request to such device, 2717 * no response will be received. And if we continue to get probe responses from that device, 2718 * and if that device happens to be on top in our device list, 2719 * we will always continue to send SD requests always to that peer only. 2720 * We will not be able to send SD requests to other devices in that case. 2721 * This implementation keeps track of last serviced peer device. 2722 * And then takes the next one from the device list, in the next iteration. 2723 */ 2724 if (p2p->sd_dev_list && p2p->sd_dev_list != &p2p->devices) { 2725 if(skip) { 2726 if ((&dev->list == p2p->sd_dev_list) ) { 2727 skip = 0; 2728 if (dev->list.next == &p2p->devices) 2729 p2p->sd_dev_list = NULL; 2730 } 2731 continue; 2732 } 2733 } 2734 p2p->sd_dev_list = &dev->list; 2735 wpa_printf(MSG_DEBUG, "P2P: ### Servicing %p dev->flags 0x%x SD schedule %s devaddr " MACSTR, 2736 p2p->sd_dev_list, dev->flags, dev->flags & P2P_DEV_SD_SCHEDULE ? "TRUE": "FALSE", 2737 MAC2STR(dev->info.p2p_device_addr)); 2738#endif 2739 if (dev->flags & P2P_DEV_SD_SCHEDULE) { 2740 if (p2p_start_sd(p2p, dev) == 0) 2741 return; 2742 else 2743 break; 2744 } else if (dev->req_config_methods && 2745 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) { 2746 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 2747 MACSTR " (config methods 0x%x)", 2748 MAC2STR(dev->info.p2p_device_addr), 2749 dev->req_config_methods); 2750 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0) 2751 return; 2752 } 2753 } 2754 2755 p2p_listen_in_find(p2p, 1); 2756} 2757 2758 2759static void p2p_sd_cb(struct p2p_data *p2p, int success) 2760{ 2761 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d", 2762 success); 2763 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2764 2765 if (!success) { 2766 if (p2p->sd_peer) { 2767 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE; 2768 p2p->sd_peer = NULL; 2769 } 2770 p2p_continue_find(p2p); 2771 return; 2772 } 2773 2774 if (p2p->sd_peer == NULL) { 2775 p2p_dbg(p2p, "No SD peer entry known"); 2776 p2p_continue_find(p2p); 2777 return; 2778 } 2779 2780 /* Wait for response from the peer */ 2781 p2p_set_state(p2p, P2P_SD_DURING_FIND); 2782 p2p_set_timeout(p2p, 0, 200000); 2783} 2784 2785 2786/** 2787 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state 2788 * @p2p: P2P module context from p2p_init() 2789 */ 2790static void p2p_retry_pd(struct p2p_data *p2p) 2791{ 2792 struct p2p_device *dev; 2793 2794 if (p2p->state != P2P_IDLE) 2795 return; 2796 2797 /* 2798 * Retry the prov disc req attempt only for the peer that the user had 2799 * requested. 2800 */ 2801 2802 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2803 if (os_memcmp(p2p->pending_pd_devaddr, 2804 dev->info.p2p_device_addr, ETH_ALEN) != 0) 2805 continue; 2806 if (!dev->req_config_methods) 2807 continue; 2808 2809 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 2810 MACSTR " (config methods 0x%x)", 2811 MAC2STR(dev->info.p2p_device_addr), 2812 dev->req_config_methods); 2813 p2p_send_prov_disc_req(p2p, dev, 2814 dev->flags & P2P_DEV_PD_FOR_JOIN, 2815 p2p->pd_force_freq); 2816 return; 2817 } 2818} 2819 2820 2821static void p2p_prov_disc_cb(struct p2p_data *p2p, int success) 2822{ 2823 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d", 2824 success); 2825 2826 /* 2827 * Postpone resetting the pending action state till after we actually 2828 * time out. This allows us to take some action like notifying any 2829 * interested parties about no response to the request. 2830 * 2831 * When the timer (below) goes off we check in IDLE, SEARCH, or 2832 * LISTEN_ONLY state, which are the only allowed states to issue a PD 2833 * requests in, if this was still pending and then raise notification. 2834 */ 2835 2836 if (!success) { 2837 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2838 2839 if (p2p->user_initiated_pd && 2840 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY)) 2841 { 2842 /* Retry request from timeout to avoid busy loops */ 2843 p2p->pending_action_state = P2P_PENDING_PD; 2844 p2p_set_timeout(p2p, 0, 50000); 2845 } else if (p2p->state != P2P_IDLE) 2846 p2p_continue_find(p2p); 2847 else if (p2p->user_initiated_pd) { 2848 p2p->pending_action_state = P2P_PENDING_PD; 2849#ifdef ANDROID_P2P 2850 p2p_set_timeout(p2p, 0, 350000); 2851#else 2852 p2p_set_timeout(p2p, 0, 300000); 2853#endif 2854 } 2855 return; 2856 } 2857 2858 /* 2859 * This postponing, of resetting pending_action_state, needs to be 2860 * done only for user initiated PD requests and not internal ones. 2861 */ 2862 if (p2p->user_initiated_pd) 2863 p2p->pending_action_state = P2P_PENDING_PD; 2864 else 2865 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2866 2867 /* Wait for response from the peer */ 2868 if (p2p->state == P2P_SEARCH) 2869 p2p_set_state(p2p, P2P_PD_DURING_FIND); 2870#ifdef ANDROID_P2P 2871 p2p_set_timeout(p2p, 0, 350000); 2872#else 2873 p2p_set_timeout(p2p, 0, 200000); 2874#endif 2875} 2876 2877 2878int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq, 2879 struct os_time *rx_time, int level, const u8 *ies, 2880 size_t ies_len) 2881{ 2882 if (os_time_before(rx_time, &p2p->find_start)) { 2883 /* 2884 * The driver may have cached (e.g., in cfg80211 BSS table) the 2885 * scan results for relatively long time. To avoid reporting 2886 * stale information, update P2P peers only based on results 2887 * that have based on frames received after the last p2p_find 2888 * operation was started. 2889 */ 2890 p2p_dbg(p2p, "Ignore old scan result for " MACSTR 2891 " (rx_time=%u.%06u)", 2892 MAC2STR(bssid), (unsigned int) rx_time->sec, 2893 (unsigned int) rx_time->usec); 2894 return 0; 2895 } 2896 2897 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1); 2898 2899 return 0; 2900} 2901 2902 2903void p2p_scan_res_handled(struct p2p_data *p2p) 2904{ 2905 if (!p2p->p2p_scan_running) { 2906 p2p_dbg(p2p, "p2p_scan was not running, but scan results received"); 2907 } 2908 p2p->p2p_scan_running = 0; 2909 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2910 2911 if (p2p_run_after_scan(p2p)) 2912 return; 2913 if (p2p->state == P2P_SEARCH) 2914 p2p_continue_find(p2p); 2915} 2916 2917 2918void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id) 2919{ 2920 u8 *len; 2921 2922#ifdef CONFIG_WIFI_DISPLAY 2923 if (p2p->wfd_ie_probe_req) 2924 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req); 2925#endif /* CONFIG_WIFI_DISPLAY */ 2926 2927 len = p2p_buf_add_ie_hdr(ies); 2928 p2p_buf_add_capability(ies, p2p->dev_capab & 2929 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2930 if (dev_id) 2931 p2p_buf_add_device_id(ies, dev_id); 2932 if (p2p->cfg->reg_class && p2p->cfg->channel) 2933 p2p_buf_add_listen_channel(ies, p2p->cfg->country, 2934 p2p->cfg->reg_class, 2935 p2p->cfg->channel); 2936 if (p2p->ext_listen_interval) 2937 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period, 2938 p2p->ext_listen_interval); 2939 /* TODO: p2p_buf_add_operating_channel() if GO */ 2940 p2p_buf_update_ie_hdr(ies, len); 2941} 2942 2943 2944size_t p2p_scan_ie_buf_len(struct p2p_data *p2p) 2945{ 2946 size_t len = 100; 2947 2948#ifdef CONFIG_WIFI_DISPLAY 2949 if (p2p && p2p->wfd_ie_probe_req) 2950 len += wpabuf_len(p2p->wfd_ie_probe_req); 2951#endif /* CONFIG_WIFI_DISPLAY */ 2952 2953 return len; 2954} 2955 2956 2957int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end) 2958{ 2959 return p2p_attr_text(p2p_ie, buf, end); 2960} 2961 2962 2963static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success) 2964{ 2965 struct p2p_device *dev = p2p->go_neg_peer; 2966 int timeout; 2967 2968 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success); 2969 2970 if (dev == NULL) { 2971 p2p_dbg(p2p, "No pending GO Negotiation"); 2972 return; 2973 } 2974 2975 if (success) { 2976 if (dev->flags & P2P_DEV_USER_REJECTED) { 2977 p2p_set_state(p2p, P2P_IDLE); 2978 return; 2979 } 2980 } else if (dev->go_neg_req_sent) { 2981 /* Cancel the increment from p2p_connect_send() on failure */ 2982 dev->go_neg_req_sent--; 2983 } 2984 2985 if (!success && 2986 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) && 2987 !is_zero_ether_addr(dev->member_in_go_dev)) { 2988 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO", 2989 MAC2STR(dev->info.p2p_device_addr)); 2990 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 2991 p2p_send_dev_disc_req(p2p, dev); 2992 return; 2993 } 2994 2995 /* 2996 * Use P2P find, if needed, to find the other device from its listen 2997 * channel. 2998 */ 2999 p2p_set_state(p2p, P2P_CONNECT); 3000 timeout = success ? 500000 : 100000; 3001 if (!success && p2p->go_neg_peer && 3002 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) { 3003 unsigned int r; 3004 /* 3005 * Peer is expected to wait our response and we will skip the 3006 * listen phase. Add some randomness to the wait time here to 3007 * make it less likely to hit cases where we could end up in 3008 * sync with peer not listening. 3009 */ 3010 os_get_random((u8 *) &r, sizeof(r)); 3011 timeout += r % 100000; 3012 } 3013 p2p_set_timeout(p2p, 0, timeout); 3014} 3015 3016 3017static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success) 3018{ 3019 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d", 3020 success); 3021 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) { 3022 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore"); 3023 return; 3024 } 3025 p2p_set_state(p2p, P2P_CONNECT); 3026 p2p_set_timeout(p2p, 0, 500000); 3027} 3028 3029 3030static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success, 3031 const u8 *addr) 3032{ 3033 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success); 3034 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) { 3035 p2p_go_neg_failed(p2p, p2p->go_neg_peer, 3036 p2p->go_neg_peer->status); 3037 } else if (success) { 3038 struct p2p_device *dev; 3039 dev = p2p_get_device(p2p, addr); 3040 if (dev && 3041 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) 3042 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE; 3043 } 3044} 3045 3046 3047static void p2p_go_neg_conf_cb(struct p2p_data *p2p, 3048 enum p2p_send_action_result result) 3049{ 3050 struct p2p_device *dev; 3051 3052 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result); 3053 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3054 if (result == P2P_SEND_ACTION_FAILED) { 3055 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3056 return; 3057 } 3058 if (result == P2P_SEND_ACTION_NO_ACK) { 3059 /* 3060 * It looks like the TX status for GO Negotiation Confirm is 3061 * often showing failure even when the peer has actually 3062 * received the frame. Since the peer may change channels 3063 * immediately after having received the frame, we may not see 3064 * an Ack for retries, so just dropping a single frame may 3065 * trigger this. To allow the group formation to succeed if the 3066 * peer did indeed receive the frame, continue regardless of 3067 * the TX status. 3068 */ 3069 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported"); 3070 } 3071 3072 dev = p2p->go_neg_peer; 3073 if (dev == NULL) 3074 return; 3075 3076 p2p_go_complete(p2p, dev); 3077} 3078 3079 3080void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 3081 const u8 *src, const u8 *bssid, 3082 enum p2p_send_action_result result) 3083{ 3084 enum p2p_pending_action_state state; 3085 int success; 3086 3087 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR 3088 " src=" MACSTR " bssid=" MACSTR " result=%d", 3089 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), 3090 MAC2STR(bssid), result); 3091 success = result == P2P_SEND_ACTION_SUCCESS; 3092 state = p2p->pending_action_state; 3093 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3094 switch (state) { 3095 case P2P_NO_PENDING_ACTION: 3096 if (p2p->after_scan_tx_in_progress) { 3097 p2p->after_scan_tx_in_progress = 0; 3098 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING && 3099 p2p_run_after_scan(p2p)) 3100 break; 3101 if (p2p->state == P2P_SEARCH) { 3102 p2p_dbg(p2p, "Continue find after after_scan_tx completion"); 3103 p2p_continue_find(p2p); 3104 } 3105 } 3106 break; 3107 case P2P_PENDING_GO_NEG_REQUEST: 3108 p2p_go_neg_req_cb(p2p, success); 3109 break; 3110 case P2P_PENDING_GO_NEG_RESPONSE: 3111 p2p_go_neg_resp_cb(p2p, success); 3112 break; 3113 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE: 3114 p2p_go_neg_resp_failure_cb(p2p, success, dst); 3115 break; 3116 case P2P_PENDING_GO_NEG_CONFIRM: 3117 p2p_go_neg_conf_cb(p2p, result); 3118 break; 3119 case P2P_PENDING_SD: 3120 p2p_sd_cb(p2p, success); 3121 break; 3122 case P2P_PENDING_PD: 3123 p2p_prov_disc_cb(p2p, success); 3124 break; 3125 case P2P_PENDING_INVITATION_REQUEST: 3126 p2p_invitation_req_cb(p2p, success); 3127 break; 3128 case P2P_PENDING_INVITATION_RESPONSE: 3129 p2p_invitation_resp_cb(p2p, success); 3130 break; 3131 case P2P_PENDING_DEV_DISC_REQUEST: 3132 p2p_dev_disc_req_cb(p2p, success); 3133 break; 3134 case P2P_PENDING_DEV_DISC_RESPONSE: 3135 p2p_dev_disc_resp_cb(p2p, success); 3136 break; 3137 case P2P_PENDING_GO_DISC_REQ: 3138 p2p_go_disc_req_cb(p2p, success); 3139 break; 3140 } 3141 3142 p2p->after_scan_tx_in_progress = 0; 3143} 3144 3145 3146void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq, 3147 unsigned int duration) 3148{ 3149 if (freq == p2p->pending_client_disc_freq) { 3150 p2p_dbg(p2p, "Client discoverability remain-awake completed"); 3151 p2p->pending_client_disc_freq = 0; 3152 return; 3153 } 3154 3155 if (freq != p2p->pending_listen_freq) { 3156 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)", 3157 freq, duration, p2p->pending_listen_freq); 3158 return; 3159 } 3160 3161 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback", 3162 p2p->pending_listen_sec, p2p->pending_listen_usec, 3163 p2p->pending_listen_freq); 3164 p2p->in_listen = 1; 3165 p2p->drv_in_listen = freq; 3166 if (p2p->pending_listen_sec || p2p->pending_listen_usec) { 3167 /* 3168 * Add 20 msec extra wait to avoid race condition with driver 3169 * remain-on-channel end event, i.e., give driver more time to 3170 * complete the operation before our timeout expires. 3171 */ 3172 p2p_set_timeout(p2p, p2p->pending_listen_sec, 3173 p2p->pending_listen_usec + 20000); 3174 } 3175 3176 p2p->pending_listen_freq = 0; 3177} 3178 3179 3180int p2p_listen_end(struct p2p_data *p2p, unsigned int freq) 3181{ 3182 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq); 3183 p2p->drv_in_listen = 0; 3184 if (p2p->in_listen) 3185 return 0; /* Internal timeout will trigger the next step */ 3186 3187 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) { 3188 if (p2p->go_neg_peer->connect_reqs >= 120) { 3189 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3190 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3191 return 0; 3192 } 3193 3194 p2p_set_state(p2p, P2P_CONNECT); 3195 p2p_connect_send(p2p, p2p->go_neg_peer); 3196 return 1; 3197 } else if (p2p->state == P2P_SEARCH) { 3198 if (p2p->p2p_scan_running) { 3199 /* 3200 * Search is already in progress. This can happen if 3201 * an Action frame RX is reported immediately after 3202 * the end of a remain-on-channel operation and the 3203 * response frame to that is sent using an offchannel 3204 * operation while in p2p_find. Avoid an attempt to 3205 * restart a scan here. 3206 */ 3207 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one"); 3208 return 1; 3209 } 3210 if (p2p->pending_listen_freq) { 3211 /* 3212 * Better wait a bit if the driver is unable to start 3213 * offchannel operation for some reason. p2p_search() 3214 * will be started from internal timeout. 3215 */ 3216 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop"); 3217 p2p_set_timeout(p2p, 0, 100000); 3218 return 1; 3219 } 3220 if (p2p->search_delay) { 3221 p2p_dbg(p2p, "Delay search operation by %u ms", 3222 p2p->search_delay); 3223 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3224 (p2p->search_delay % 1000) * 1000); 3225 return 1; 3226 } 3227 p2p_search(p2p); 3228 return 1; 3229 } 3230 3231 return 0; 3232} 3233 3234 3235static void p2p_timeout_connect(struct p2p_data *p2p) 3236{ 3237 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3238 if (p2p->go_neg_peer && 3239 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 3240 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed"); 3241 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3242 return; 3243 } 3244 if (p2p->go_neg_peer && 3245 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) && 3246 p2p->go_neg_peer->connect_reqs < 120) { 3247 p2p_dbg(p2p, "Peer expected to wait our response - skip listen"); 3248 p2p_connect_send(p2p, p2p->go_neg_peer); 3249 return; 3250 } 3251 3252 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3253 p2p_listen_in_find(p2p, 0); 3254} 3255 3256 3257static void p2p_timeout_connect_listen(struct p2p_data *p2p) 3258{ 3259 if (p2p->go_neg_peer) { 3260 if (p2p->drv_in_listen) { 3261 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete"); 3262 return; 3263 } 3264 3265 if (p2p->go_neg_peer->connect_reqs >= 120) { 3266 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3267 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3268 return; 3269 } 3270 3271 p2p_set_state(p2p, P2P_CONNECT); 3272 p2p_connect_send(p2p, p2p->go_neg_peer); 3273 } else 3274 p2p_set_state(p2p, P2P_IDLE); 3275} 3276 3277 3278static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p) 3279{ 3280 /* 3281 * TODO: could remain constantly in Listen state for some time if there 3282 * are no other concurrent uses for the radio. For now, go to listen 3283 * state once per second to give other uses a chance to use the radio. 3284 */ 3285 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 3286 p2p_set_timeout(p2p, 0, 500000); 3287} 3288 3289 3290static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p) 3291{ 3292 struct p2p_device *dev = p2p->go_neg_peer; 3293 3294 if (dev == NULL) { 3295 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait"); 3296 return; 3297 } 3298 3299 dev->wait_count++; 3300 if (dev->wait_count >= 120) { 3301 p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation"); 3302 p2p_go_neg_failed(p2p, dev, -1); 3303 return; 3304 } 3305 3306 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation"); 3307 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT); 3308 p2p_listen_in_find(p2p, 0); 3309} 3310 3311 3312static void p2p_timeout_sd_during_find(struct p2p_data *p2p) 3313{ 3314 p2p_dbg(p2p, "Service Discovery Query timeout"); 3315 if (p2p->sd_peer) { 3316 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3317 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE; 3318 p2p->sd_peer = NULL; 3319 } 3320 p2p_continue_find(p2p); 3321} 3322 3323 3324static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p) 3325{ 3326 p2p_dbg(p2p, "Provision Discovery Request timeout"); 3327 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3328 p2p_continue_find(p2p); 3329} 3330 3331 3332static void p2p_timeout_prov_disc_req(struct p2p_data *p2p) 3333{ 3334 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3335 3336 /* 3337 * For user initiated PD requests that we have not gotten any responses 3338 * for while in IDLE state, we retry them a couple of times before 3339 * giving up. 3340 */ 3341 if (!p2p->user_initiated_pd) 3342 return; 3343 3344 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout"); 3345 3346 if (p2p->pd_retries) { 3347 p2p->pd_retries--; 3348 p2p_retry_pd(p2p); 3349 } else { 3350 struct p2p_device *dev; 3351 int for_join = 0; 3352 3353 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3354 if (os_memcmp(p2p->pending_pd_devaddr, 3355 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3356 continue; 3357 if (dev->req_config_methods && 3358 (dev->flags & P2P_DEV_PD_FOR_JOIN)) 3359 for_join = 1; 3360 } 3361 3362 if (p2p->cfg->prov_disc_fail) 3363 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, 3364 p2p->pending_pd_devaddr, 3365 for_join ? 3366 P2P_PROV_DISC_TIMEOUT_JOIN : 3367 P2P_PROV_DISC_TIMEOUT); 3368 p2p_reset_pending_pd(p2p); 3369 } 3370} 3371 3372 3373static void p2p_timeout_invite(struct p2p_data *p2p) 3374{ 3375 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3376 p2p_set_state(p2p, P2P_INVITE_LISTEN); 3377 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 3378 /* 3379 * Better remain on operating channel instead of listen channel 3380 * when running a group. 3381 */ 3382 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel"); 3383 p2p_set_timeout(p2p, 0, 100000); 3384 return; 3385 } 3386 p2p_listen_in_find(p2p, 0); 3387} 3388 3389 3390static void p2p_timeout_invite_listen(struct p2p_data *p2p) 3391{ 3392 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) { 3393 p2p_set_state(p2p, P2P_INVITE); 3394 p2p_invite_send(p2p, p2p->invite_peer, 3395 p2p->invite_go_dev_addr); 3396 } else { 3397 if (p2p->invite_peer) { 3398 p2p_dbg(p2p, "Invitation Request retry limit reached"); 3399 if (p2p->cfg->invitation_result) 3400 p2p->cfg->invitation_result( 3401 p2p->cfg->cb_ctx, -1, NULL, NULL, 3402 p2p->invite_peer->info.p2p_device_addr, 3403 0); 3404 } 3405 p2p_set_state(p2p, P2P_IDLE); 3406 } 3407} 3408 3409 3410static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx) 3411{ 3412 struct p2p_data *p2p = eloop_ctx; 3413 3414 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state)); 3415 3416 p2p->in_listen = 0; 3417 3418 switch (p2p->state) { 3419 case P2P_IDLE: 3420 /* Check if we timed out waiting for PD req */ 3421 if (p2p->pending_action_state == P2P_PENDING_PD) 3422 p2p_timeout_prov_disc_req(p2p); 3423 break; 3424 case P2P_SEARCH: 3425 /* Check if we timed out waiting for PD req */ 3426 if (p2p->pending_action_state == P2P_PENDING_PD) 3427 p2p_timeout_prov_disc_req(p2p); 3428 if (p2p->search_delay && !p2p->in_search_delay) { 3429 p2p_dbg(p2p, "Delay search operation by %u ms", 3430 p2p->search_delay); 3431 p2p->in_search_delay = 1; 3432 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3433 (p2p->search_delay % 1000) * 1000); 3434 break; 3435 } 3436 p2p->in_search_delay = 0; 3437 p2p_search(p2p); 3438 break; 3439 case P2P_CONNECT: 3440 p2p_timeout_connect(p2p); 3441 break; 3442 case P2P_CONNECT_LISTEN: 3443 p2p_timeout_connect_listen(p2p); 3444 break; 3445 case P2P_GO_NEG: 3446 break; 3447 case P2P_LISTEN_ONLY: 3448 /* Check if we timed out waiting for PD req */ 3449 if (p2p->pending_action_state == P2P_PENDING_PD) 3450 p2p_timeout_prov_disc_req(p2p); 3451 3452 if (p2p->ext_listen_only) { 3453 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed"); 3454 p2p->ext_listen_only = 0; 3455 p2p_set_state(p2p, P2P_IDLE); 3456 } 3457 break; 3458 case P2P_WAIT_PEER_CONNECT: 3459 p2p_timeout_wait_peer_connect(p2p); 3460 break; 3461 case P2P_WAIT_PEER_IDLE: 3462 p2p_timeout_wait_peer_idle(p2p); 3463 break; 3464 case P2P_SD_DURING_FIND: 3465 p2p_timeout_sd_during_find(p2p); 3466 break; 3467 case P2P_PROVISIONING: 3468 break; 3469 case P2P_PD_DURING_FIND: 3470 p2p_timeout_prov_disc_during_find(p2p); 3471 break; 3472 case P2P_INVITE: 3473 p2p_timeout_invite(p2p); 3474 break; 3475 case P2P_INVITE_LISTEN: 3476 p2p_timeout_invite_listen(p2p); 3477 break; 3478 case P2P_SEARCH_WHEN_READY: 3479 break; 3480 case P2P_CONTINUE_SEARCH_WHEN_READY: 3481 break; 3482 } 3483} 3484 3485 3486int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr) 3487{ 3488 struct p2p_device *dev; 3489 3490 dev = p2p_get_device(p2p, peer_addr); 3491 p2p_dbg(p2p, "Local request to reject connection attempts by peer " 3492 MACSTR, MAC2STR(peer_addr)); 3493 if (dev == NULL) { 3494 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr)); 3495 return -1; 3496 } 3497 dev->status = P2P_SC_FAIL_REJECTED_BY_USER; 3498 dev->flags |= P2P_DEV_USER_REJECTED; 3499 return 0; 3500} 3501 3502 3503const char * p2p_wps_method_text(enum p2p_wps_method method) 3504{ 3505 switch (method) { 3506 case WPS_NOT_READY: 3507 return "not-ready"; 3508 case WPS_PIN_DISPLAY: 3509 return "Display"; 3510 case WPS_PIN_KEYPAD: 3511 return "Keypad"; 3512 case WPS_PBC: 3513 return "PBC"; 3514 } 3515 3516 return "??"; 3517} 3518 3519 3520static const char * p2p_go_state_text(enum p2p_go_state go_state) 3521{ 3522 switch (go_state) { 3523 case UNKNOWN_GO: 3524 return "unknown"; 3525 case LOCAL_GO: 3526 return "local"; 3527 case REMOTE_GO: 3528 return "remote"; 3529 } 3530 3531 return "??"; 3532} 3533 3534 3535const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p, 3536 const u8 *addr, int next) 3537{ 3538 struct p2p_device *dev; 3539 3540 if (addr) 3541 dev = p2p_get_device(p2p, addr); 3542 else 3543 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 3544 3545 if (dev && next) { 3546 dev = dl_list_first(&dev->list, struct p2p_device, list); 3547 if (&dev->list == &p2p->devices) 3548 dev = NULL; 3549 } 3550 3551 if (dev == NULL) 3552 return NULL; 3553 3554 return &dev->info; 3555} 3556 3557 3558int p2p_get_peer_info_txt(const struct p2p_peer_info *info, 3559 char *buf, size_t buflen) 3560{ 3561 struct p2p_device *dev; 3562 int res; 3563 char *pos, *end; 3564 struct os_time now; 3565 3566 if (info == NULL) 3567 return -1; 3568 3569 dev = (struct p2p_device *) (((u8 *) info) - 3570 offsetof(struct p2p_device, info)); 3571 3572 pos = buf; 3573 end = buf + buflen; 3574 3575 os_get_time(&now); 3576 res = os_snprintf(pos, end - pos, 3577 "age=%d\n" 3578 "listen_freq=%d\n" 3579 "wps_method=%s\n" 3580 "interface_addr=" MACSTR "\n" 3581 "member_in_go_dev=" MACSTR "\n" 3582 "member_in_go_iface=" MACSTR "\n" 3583 "go_neg_req_sent=%d\n" 3584 "go_state=%s\n" 3585 "dialog_token=%u\n" 3586 "intended_addr=" MACSTR "\n" 3587 "country=%c%c\n" 3588 "oper_freq=%d\n" 3589 "req_config_methods=0x%x\n" 3590 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n" 3591 "status=%d\n" 3592 "wait_count=%u\n" 3593 "invitation_reqs=%u\n", 3594 (int) (now.sec - dev->last_seen.sec), 3595 dev->listen_freq, 3596 p2p_wps_method_text(dev->wps_method), 3597 MAC2STR(dev->interface_addr), 3598 MAC2STR(dev->member_in_go_dev), 3599 MAC2STR(dev->member_in_go_iface), 3600 dev->go_neg_req_sent, 3601 p2p_go_state_text(dev->go_state), 3602 dev->dialog_token, 3603 MAC2STR(dev->intended_addr), 3604 dev->country[0] ? dev->country[0] : '_', 3605 dev->country[1] ? dev->country[1] : '_', 3606 dev->oper_freq, 3607 dev->req_config_methods, 3608 dev->flags & P2P_DEV_PROBE_REQ_ONLY ? 3609 "[PROBE_REQ_ONLY]" : "", 3610 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "", 3611 dev->flags & P2P_DEV_NOT_YET_READY ? 3612 "[NOT_YET_READY]" : "", 3613 dev->flags & P2P_DEV_SD_INFO ? "[SD_INFO]" : "", 3614 dev->flags & P2P_DEV_SD_SCHEDULE ? "[SD_SCHEDULE]" : 3615 "", 3616 dev->flags & P2P_DEV_PD_PEER_DISPLAY ? 3617 "[PD_PEER_DISPLAY]" : "", 3618 dev->flags & P2P_DEV_PD_PEER_KEYPAD ? 3619 "[PD_PEER_KEYPAD]" : "", 3620 dev->flags & P2P_DEV_USER_REJECTED ? 3621 "[USER_REJECTED]" : "", 3622 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ? 3623 "[PEER_WAITING_RESPONSE]" : "", 3624 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ? 3625 "[PREFER_PERSISTENT_GROUP]" : "", 3626 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ? 3627 "[WAIT_GO_NEG_RESPONSE]" : "", 3628 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ? 3629 "[WAIT_GO_NEG_CONFIRM]" : "", 3630 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ? 3631 "[GROUP_CLIENT_ONLY]" : "", 3632 dev->flags & P2P_DEV_FORCE_FREQ ? 3633 "[FORCE_FREQ]" : "", 3634 dev->flags & P2P_DEV_PD_FOR_JOIN ? 3635 "[PD_FOR_JOIN]" : "", 3636 dev->status, 3637 dev->wait_count, 3638 dev->invitation_reqs); 3639 if (res < 0 || res >= end - pos) 3640 return pos - buf; 3641 pos += res; 3642 3643 if (dev->ext_listen_period) { 3644 res = os_snprintf(pos, end - pos, 3645 "ext_listen_period=%u\n" 3646 "ext_listen_interval=%u\n", 3647 dev->ext_listen_period, 3648 dev->ext_listen_interval); 3649 if (res < 0 || res >= end - pos) 3650 return pos - buf; 3651 pos += res; 3652 } 3653 3654 if (dev->oper_ssid_len) { 3655 res = os_snprintf(pos, end - pos, 3656 "oper_ssid=%s\n", 3657 wpa_ssid_txt(dev->oper_ssid, 3658 dev->oper_ssid_len)); 3659 if (res < 0 || res >= end - pos) 3660 return pos - buf; 3661 pos += res; 3662 } 3663 3664#ifdef CONFIG_WIFI_DISPLAY 3665 if (dev->info.wfd_subelems) { 3666 res = os_snprintf(pos, end - pos, "wfd_subelems="); 3667 if (res < 0 || res >= end - pos) 3668 return pos - buf; 3669 pos += res; 3670 3671 pos += wpa_snprintf_hex(pos, end - pos, 3672 wpabuf_head(dev->info.wfd_subelems), 3673 wpabuf_len(dev->info.wfd_subelems)); 3674 3675 res = os_snprintf(pos, end - pos, "\n"); 3676 if (res < 0 || res >= end - pos) 3677 return pos - buf; 3678 pos += res; 3679 } 3680#endif /* CONFIG_WIFI_DISPLAY */ 3681 3682 return pos - buf; 3683} 3684 3685 3686int p2p_peer_known(struct p2p_data *p2p, const u8 *addr) 3687{ 3688 return p2p_get_device(p2p, addr) != NULL; 3689} 3690 3691 3692void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled) 3693{ 3694 if (enabled) { 3695 p2p_dbg(p2p, "Client discoverability enabled"); 3696 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3697 } else { 3698 p2p_dbg(p2p, "Client discoverability disabled"); 3699 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3700 } 3701} 3702 3703 3704static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1, 3705 u32 duration2, u32 interval2) 3706{ 3707 struct wpabuf *req; 3708 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL; 3709 u8 *len; 3710 3711 req = wpabuf_alloc(100); 3712 if (req == NULL) 3713 return NULL; 3714 3715 if (duration1 || interval1) { 3716 os_memset(&desc1, 0, sizeof(desc1)); 3717 desc1.count_type = 1; 3718 desc1.duration = duration1; 3719 desc1.interval = interval1; 3720 ptr1 = &desc1; 3721 3722 if (duration2 || interval2) { 3723 os_memset(&desc2, 0, sizeof(desc2)); 3724 desc2.count_type = 2; 3725 desc2.duration = duration2; 3726 desc2.interval = interval2; 3727 ptr2 = &desc2; 3728 } 3729 } 3730 3731 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1); 3732 len = p2p_buf_add_ie_hdr(req); 3733 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2); 3734 p2p_buf_update_ie_hdr(req, len); 3735 3736 return req; 3737} 3738 3739 3740int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr, 3741 const u8 *own_interface_addr, unsigned int freq, 3742 u32 duration1, u32 interval1, u32 duration2, 3743 u32 interval2) 3744{ 3745 struct wpabuf *req; 3746 3747 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR 3748 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u " 3749 "dur2=%u int2=%u", 3750 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr), 3751 freq, duration1, interval1, duration2, interval2); 3752 3753 req = p2p_build_presence_req(duration1, interval1, duration2, 3754 interval2); 3755 if (req == NULL) 3756 return -1; 3757 3758 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3759 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr, 3760 go_interface_addr, 3761 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 3762 p2p_dbg(p2p, "Failed to send Action frame"); 3763 } 3764 wpabuf_free(req); 3765 3766 return 0; 3767} 3768 3769 3770static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa, 3771 size_t noa_len, u8 dialog_token) 3772{ 3773 struct wpabuf *resp; 3774 u8 *len; 3775 3776 resp = wpabuf_alloc(100 + noa_len); 3777 if (resp == NULL) 3778 return NULL; 3779 3780 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token); 3781 len = p2p_buf_add_ie_hdr(resp); 3782 p2p_buf_add_status(resp, status); 3783 if (noa) { 3784 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE); 3785 wpabuf_put_le16(resp, noa_len); 3786 wpabuf_put_data(resp, noa, noa_len); 3787 } else 3788 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL); 3789 p2p_buf_update_ie_hdr(resp, len); 3790 3791 return resp; 3792} 3793 3794 3795static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 3796 const u8 *sa, const u8 *data, size_t len, 3797 int rx_freq) 3798{ 3799 struct p2p_message msg; 3800 u8 status; 3801 struct wpabuf *resp; 3802 size_t g; 3803 struct p2p_group *group = NULL; 3804 int parsed = 0; 3805 u8 noa[50]; 3806 int noa_len; 3807 3808 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request"); 3809 3810 for (g = 0; g < p2p->num_groups; g++) { 3811 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]), 3812 ETH_ALEN) == 0) { 3813 group = p2p->groups[g]; 3814 break; 3815 } 3816 } 3817 if (group == NULL) { 3818 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group " 3819 MACSTR, MAC2STR(da)); 3820 return; 3821 } 3822 3823 if (p2p_parse(data, len, &msg) < 0) { 3824 p2p_dbg(p2p, "Failed to parse P2P Presence Request"); 3825 status = P2P_SC_FAIL_INVALID_PARAMS; 3826 goto fail; 3827 } 3828 parsed = 1; 3829 3830 if (msg.noa == NULL) { 3831 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request"); 3832 status = P2P_SC_FAIL_INVALID_PARAMS; 3833 goto fail; 3834 } 3835 3836 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len); 3837 3838fail: 3839 if (p2p->cfg->get_noa) 3840 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa, 3841 sizeof(noa)); 3842 else 3843 noa_len = -1; 3844 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL, 3845 noa_len > 0 ? noa_len : 0, 3846 msg.dialog_token); 3847 if (parsed) 3848 p2p_parse_free(&msg); 3849 if (resp == NULL) 3850 return; 3851 3852 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3853 if (p2p_send_action(p2p, rx_freq, sa, da, da, 3854 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 3855 p2p_dbg(p2p, "Failed to send Action frame"); 3856 } 3857 wpabuf_free(resp); 3858} 3859 3860 3861static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 3862 const u8 *sa, const u8 *data, size_t len) 3863{ 3864 struct p2p_message msg; 3865 3866 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response"); 3867 3868 if (p2p_parse(data, len, &msg) < 0) { 3869 p2p_dbg(p2p, "Failed to parse P2P Presence Response"); 3870 return; 3871 } 3872 3873 if (msg.status == NULL || msg.noa == NULL) { 3874 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response"); 3875 p2p_parse_free(&msg); 3876 return; 3877 } 3878 3879 if (*msg.status) { 3880 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u", 3881 *msg.status); 3882 p2p_parse_free(&msg); 3883 return; 3884 } 3885 3886 p2p_dbg(p2p, "P2P Presence Request was accepted"); 3887 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA", 3888 msg.noa, msg.noa_len); 3889 /* TODO: process NoA */ 3890 p2p_parse_free(&msg); 3891} 3892 3893 3894static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx) 3895{ 3896 struct p2p_data *p2p = eloop_ctx; 3897 3898 if (p2p->ext_listen_interval) { 3899 /* Schedule next extended listen timeout */ 3900 eloop_register_timeout(p2p->ext_listen_interval_sec, 3901 p2p->ext_listen_interval_usec, 3902 p2p_ext_listen_timeout, p2p, NULL); 3903 } 3904 3905 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) { 3906 /* 3907 * This should not really happen, but it looks like the Listen 3908 * command may fail is something else (e.g., a scan) was 3909 * running at an inconvenient time. As a workaround, allow new 3910 * Extended Listen operation to be started. 3911 */ 3912 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again"); 3913 p2p->ext_listen_only = 0; 3914 p2p_set_state(p2p, P2P_IDLE); 3915 } 3916 3917 if (p2p->state != P2P_IDLE) { 3918 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state)); 3919 return; 3920 } 3921 3922 p2p_dbg(p2p, "Extended Listen timeout"); 3923 p2p->ext_listen_only = 1; 3924 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) { 3925 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing"); 3926 p2p->ext_listen_only = 0; 3927 } 3928} 3929 3930 3931int p2p_ext_listen(struct p2p_data *p2p, unsigned int period, 3932 unsigned int interval) 3933{ 3934 if (period > 65535 || interval > 65535 || period > interval || 3935 (period == 0 && interval > 0) || (period > 0 && interval == 0)) { 3936 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u", 3937 period, interval); 3938 return -1; 3939 } 3940 3941 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 3942 3943 if (interval == 0) { 3944 p2p_dbg(p2p, "Disabling Extended Listen Timing"); 3945 p2p->ext_listen_period = 0; 3946 p2p->ext_listen_interval = 0; 3947 return 0; 3948 } 3949 3950 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec", 3951 period, interval); 3952 p2p->ext_listen_period = period; 3953 p2p->ext_listen_interval = interval; 3954 p2p->ext_listen_interval_sec = interval / 1000; 3955 p2p->ext_listen_interval_usec = (interval % 1000) * 1000; 3956 3957 eloop_register_timeout(p2p->ext_listen_interval_sec, 3958 p2p->ext_listen_interval_usec, 3959 p2p_ext_listen_timeout, p2p, NULL); 3960 3961 return 0; 3962} 3963 3964 3965void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 3966 const u8 *ie, size_t ie_len) 3967{ 3968 struct p2p_message msg; 3969 3970 if (bssid == NULL || ie == NULL) 3971 return; 3972 3973 os_memset(&msg, 0, sizeof(msg)); 3974 if (p2p_parse_ies(ie, ie_len, &msg)) 3975 return; 3976 if (msg.minor_reason_code == NULL) 3977 return; 3978 3979 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR 3980 " reason_code=%u minor_reason_code=%u", 3981 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 3982 3983 p2p_parse_free(&msg); 3984} 3985 3986 3987void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 3988 const u8 *ie, size_t ie_len) 3989{ 3990 struct p2p_message msg; 3991 3992 if (bssid == NULL || ie == NULL) 3993 return; 3994 3995 os_memset(&msg, 0, sizeof(msg)); 3996 if (p2p_parse_ies(ie, ie_len, &msg)) 3997 return; 3998 if (msg.minor_reason_code == NULL) 3999 return; 4000 4001 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR 4002 " reason_code=%u minor_reason_code=%u", 4003 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4004 4005 p2p_parse_free(&msg); 4006} 4007 4008 4009void p2p_set_managed_oper(struct p2p_data *p2p, int enabled) 4010{ 4011 if (enabled) { 4012 p2p_dbg(p2p, "Managed P2P Device operations enabled"); 4013 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED; 4014 } else { 4015 p2p_dbg(p2p, "Managed P2P Device operations disabled"); 4016 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED; 4017 } 4018} 4019 4020 4021int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel) 4022{ 4023 if (p2p_channel_to_freq(reg_class, channel) < 0) 4024 return -1; 4025 4026 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u", 4027 reg_class, channel); 4028 p2p->cfg->reg_class = reg_class; 4029 p2p->cfg->channel = channel; 4030 4031 return 0; 4032} 4033 4034 4035int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len) 4036{ 4037 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len)); 4038 if (postfix == NULL) { 4039 p2p->cfg->ssid_postfix_len = 0; 4040 return 0; 4041 } 4042 if (len > sizeof(p2p->cfg->ssid_postfix)) 4043 return -1; 4044 os_memcpy(p2p->cfg->ssid_postfix, postfix, len); 4045 p2p->cfg->ssid_postfix_len = len; 4046 return 0; 4047} 4048 4049 4050int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel, 4051 int cfg_op_channel) 4052{ 4053 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0) 4054 return -1; 4055 4056 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u", 4057 op_reg_class, op_channel); 4058 p2p->cfg->op_reg_class = op_reg_class; 4059 p2p->cfg->op_channel = op_channel; 4060 p2p->cfg->cfg_op_channel = cfg_op_channel; 4061 return 0; 4062} 4063 4064 4065int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan, 4066 const struct p2p_channel *pref_chan) 4067{ 4068 struct p2p_channel *n; 4069 4070 if (pref_chan) { 4071 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel)); 4072 if (n == NULL) 4073 return -1; 4074 os_memcpy(n, pref_chan, 4075 num_pref_chan * sizeof(struct p2p_channel)); 4076 } else 4077 n = NULL; 4078 4079 os_free(p2p->cfg->pref_chan); 4080 p2p->cfg->pref_chan = n; 4081 p2p->cfg->num_pref_chan = num_pref_chan; 4082 4083 return 0; 4084} 4085 4086 4087int p2p_set_no_go_freq(struct p2p_data *p2p, 4088 const struct wpa_freq_range_list *list) 4089{ 4090 struct wpa_freq_range *tmp; 4091 4092 if (list == NULL || list->num == 0) { 4093 os_free(p2p->no_go_freq.range); 4094 p2p->no_go_freq.range = NULL; 4095 p2p->no_go_freq.num = 0; 4096 return 0; 4097 } 4098 4099 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range)); 4100 if (tmp == NULL) 4101 return -1; 4102 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range)); 4103 os_free(p2p->no_go_freq.range); 4104 p2p->no_go_freq.range = tmp; 4105 p2p->no_go_freq.num = list->num; 4106 p2p_dbg(p2p, "Updated no GO chan list"); 4107 4108 return 0; 4109} 4110 4111 4112int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr, 4113 u8 *iface_addr) 4114{ 4115 struct p2p_device *dev = p2p_get_device(p2p, dev_addr); 4116 if (dev == NULL || is_zero_ether_addr(dev->interface_addr)) 4117 return -1; 4118 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN); 4119 return 0; 4120} 4121 4122 4123int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr, 4124 u8 *dev_addr) 4125{ 4126 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4127 if (dev == NULL) 4128 return -1; 4129 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN); 4130 return 0; 4131} 4132 4133 4134void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr) 4135{ 4136 os_memcpy(p2p->peer_filter, addr, ETH_ALEN); 4137 if (is_zero_ether_addr(p2p->peer_filter)) 4138 p2p_dbg(p2p, "Disable peer filter"); 4139 else 4140 p2p_dbg(p2p, "Enable peer filter for " MACSTR, 4141 MAC2STR(p2p->peer_filter)); 4142} 4143 4144 4145void p2p_set_cross_connect(struct p2p_data *p2p, int enabled) 4146{ 4147 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled"); 4148 if (p2p->cross_connect == enabled) 4149 return; 4150 p2p->cross_connect = enabled; 4151 /* TODO: may need to tear down any action group where we are GO(?) */ 4152} 4153 4154 4155int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr) 4156{ 4157 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4158 if (dev == NULL) 4159 return -1; 4160 if (dev->oper_freq <= 0) 4161 return -1; 4162 return dev->oper_freq; 4163} 4164 4165 4166void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled) 4167{ 4168 p2p_dbg(p2p, "Intra BSS distribution %s", 4169 enabled ? "enabled" : "disabled"); 4170 p2p->cfg->p2p_intra_bss = enabled; 4171} 4172 4173 4174void p2p_update_channel_list(struct p2p_data *p2p, 4175 const struct p2p_channels *chan, 4176 const struct p2p_channels *cli_chan) 4177{ 4178 p2p_dbg(p2p, "Update channel list"); 4179 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels)); 4180 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 4181 os_memcpy(&p2p->cfg->cli_channels, cli_chan, 4182 sizeof(struct p2p_channels)); 4183 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 4184} 4185 4186 4187int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 4188 const u8 *src, const u8 *bssid, const u8 *buf, 4189 size_t len, unsigned int wait_time) 4190{ 4191 if (p2p->p2p_scan_running) { 4192 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes"); 4193 if (p2p->after_scan_tx) { 4194 p2p_dbg(p2p, "Dropped previous pending Action frame TX"); 4195 os_free(p2p->after_scan_tx); 4196 } 4197 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) + 4198 len); 4199 if (p2p->after_scan_tx == NULL) 4200 return -1; 4201 p2p->after_scan_tx->freq = freq; 4202 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN); 4203 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN); 4204 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN); 4205 p2p->after_scan_tx->len = len; 4206 p2p->after_scan_tx->wait_time = wait_time; 4207 os_memcpy(p2p->after_scan_tx + 1, buf, len); 4208 return 0; 4209 } 4210 4211 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid, 4212 buf, len, wait_time); 4213} 4214 4215 4216void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5, 4217 int freq_overall) 4218{ 4219 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d", 4220 freq_24, freq_5, freq_overall); 4221 p2p->best_freq_24 = freq_24; 4222 p2p->best_freq_5 = freq_5; 4223 p2p->best_freq_overall = freq_overall; 4224} 4225 4226 4227void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq) 4228{ 4229 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq); 4230 p2p->own_freq_preference = freq; 4231} 4232 4233 4234const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p) 4235{ 4236 if (p2p == NULL || p2p->go_neg_peer == NULL) 4237 return NULL; 4238 return p2p->go_neg_peer->info.p2p_device_addr; 4239} 4240 4241 4242const struct p2p_peer_info * 4243p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next) 4244{ 4245 struct p2p_device *dev; 4246 4247 if (addr) { 4248 dev = p2p_get_device(p2p, addr); 4249 if (!dev) 4250 return NULL; 4251 4252 if (!next) { 4253 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 4254 return NULL; 4255 4256 return &dev->info; 4257 } else { 4258 do { 4259 dev = dl_list_first(&dev->list, 4260 struct p2p_device, 4261 list); 4262 if (&dev->list == &p2p->devices) 4263 return NULL; 4264 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY); 4265 } 4266 } else { 4267 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4268 if (!dev) 4269 return NULL; 4270 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 4271 dev = dl_list_first(&dev->list, 4272 struct p2p_device, 4273 list); 4274 if (&dev->list == &p2p->devices) 4275 return NULL; 4276 } 4277 } 4278 4279 return &dev->info; 4280} 4281 4282 4283int p2p_in_progress(struct p2p_data *p2p) 4284{ 4285 if (p2p == NULL) 4286 return 0; 4287 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SEARCH_WHEN_READY || 4288 p2p->state == P2P_CONTINUE_SEARCH_WHEN_READY) 4289 return 2; 4290 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING; 4291} 4292 4293 4294void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout, 4295 u8 client_timeout) 4296{ 4297 if (p2p) { 4298 p2p->go_timeout = go_timeout; 4299 p2p->client_timeout = client_timeout; 4300 } 4301} 4302 4303 4304void p2p_increase_search_delay(struct p2p_data *p2p, unsigned int delay) 4305{ 4306 if (p2p && p2p->search_delay < delay) 4307 p2p->search_delay = delay; 4308} 4309 4310 4311#ifdef CONFIG_WIFI_DISPLAY 4312 4313static void p2p_update_wfd_ie_groups(struct p2p_data *p2p) 4314{ 4315 size_t g; 4316 struct p2p_group *group; 4317 4318 for (g = 0; g < p2p->num_groups; g++) { 4319 group = p2p->groups[g]; 4320 p2p_group_force_beacon_update_ies(group); 4321 } 4322} 4323 4324 4325int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie) 4326{ 4327 wpabuf_free(p2p->wfd_ie_beacon); 4328 p2p->wfd_ie_beacon = ie; 4329 p2p_update_wfd_ie_groups(p2p); 4330 return 0; 4331} 4332 4333 4334int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie) 4335{ 4336 wpabuf_free(p2p->wfd_ie_probe_req); 4337 p2p->wfd_ie_probe_req = ie; 4338 return 0; 4339} 4340 4341 4342int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie) 4343{ 4344 wpabuf_free(p2p->wfd_ie_probe_resp); 4345 p2p->wfd_ie_probe_resp = ie; 4346 p2p_update_wfd_ie_groups(p2p); 4347 return 0; 4348} 4349 4350 4351int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie) 4352{ 4353 wpabuf_free(p2p->wfd_ie_assoc_req); 4354 p2p->wfd_ie_assoc_req = ie; 4355 return 0; 4356} 4357 4358 4359int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie) 4360{ 4361 wpabuf_free(p2p->wfd_ie_invitation); 4362 p2p->wfd_ie_invitation = ie; 4363 return 0; 4364} 4365 4366 4367int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie) 4368{ 4369 wpabuf_free(p2p->wfd_ie_prov_disc_req); 4370 p2p->wfd_ie_prov_disc_req = ie; 4371 return 0; 4372} 4373 4374 4375int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie) 4376{ 4377 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 4378 p2p->wfd_ie_prov_disc_resp = ie; 4379 return 0; 4380} 4381 4382 4383int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie) 4384{ 4385 wpabuf_free(p2p->wfd_ie_go_neg); 4386 p2p->wfd_ie_go_neg = ie; 4387 return 0; 4388} 4389 4390 4391int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem) 4392{ 4393 wpabuf_free(p2p->wfd_dev_info); 4394 if (elem) { 4395 p2p->wfd_dev_info = wpabuf_dup(elem); 4396 if (p2p->wfd_dev_info == NULL) 4397 return -1; 4398 } else 4399 p2p->wfd_dev_info = NULL; 4400 4401 return 0; 4402} 4403 4404 4405int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem) 4406{ 4407 wpabuf_free(p2p->wfd_assoc_bssid); 4408 if (elem) { 4409 p2p->wfd_assoc_bssid = wpabuf_dup(elem); 4410 if (p2p->wfd_assoc_bssid == NULL) 4411 return -1; 4412 } else 4413 p2p->wfd_assoc_bssid = NULL; 4414 4415 return 0; 4416} 4417 4418 4419int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p, 4420 const struct wpabuf *elem) 4421{ 4422 wpabuf_free(p2p->wfd_coupled_sink_info); 4423 if (elem) { 4424 p2p->wfd_coupled_sink_info = wpabuf_dup(elem); 4425 if (p2p->wfd_coupled_sink_info == NULL) 4426 return -1; 4427 } else 4428 p2p->wfd_coupled_sink_info = NULL; 4429 4430 return 0; 4431} 4432 4433#endif /* CONFIG_WIFI_DISPLAY */ 4434 4435 4436int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int, 4437 int max_disc_tu) 4438{ 4439 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0) 4440 return -1; 4441 4442 p2p->min_disc_int = min_disc_int; 4443 p2p->max_disc_int = max_disc_int; 4444 p2p->max_disc_tu = max_disc_tu; 4445 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d", 4446 min_disc_int, max_disc_int, max_disc_tu); 4447 4448 return 0; 4449} 4450 4451 4452void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...) 4453{ 4454 va_list ap; 4455 char buf[500]; 4456 4457 if (!p2p->cfg->debug_print) 4458 return; 4459 4460 va_start(ap, fmt); 4461 vsnprintf(buf, sizeof(buf), fmt, ap); 4462 buf[sizeof(buf) - 1] = '\0'; 4463 va_end(ap); 4464 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf); 4465} 4466 4467 4468void p2p_info(struct p2p_data *p2p, const char *fmt, ...) 4469{ 4470 va_list ap; 4471 char buf[500]; 4472 4473 if (!p2p->cfg->debug_print) 4474 return; 4475 4476 va_start(ap, fmt); 4477 vsnprintf(buf, sizeof(buf), fmt, ap); 4478 buf[sizeof(buf) - 1] = '\0'; 4479 va_end(ap); 4480 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf); 4481} 4482 4483 4484void p2p_err(struct p2p_data *p2p, const char *fmt, ...) 4485{ 4486 va_list ap; 4487 char buf[500]; 4488 4489 if (!p2p->cfg->debug_print) 4490 return; 4491 4492 va_start(ap, fmt); 4493 vsnprintf(buf, sizeof(buf), fmt, ap); 4494 buf[sizeof(buf) - 1] = '\0'; 4495 va_end(ap); 4496 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf); 4497} 4498