p2p.c revision 68d0e3ed07847339aedfac8e02f50db68c702e52
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#ifdef ANDROID_P2P 1115int p2p_search_pending(struct p2p_data *p2p) 1116{ 1117 if(p2p == NULL) 1118 return 0; 1119 1120 if(p2p->state == P2P_SEARCH_WHEN_READY) 1121 return 1; 1122 1123 return 0; 1124} 1125#endif 1126 1127int p2p_other_scan_completed(struct p2p_data *p2p) 1128{ 1129 if (p2p->state == P2P_CONTINUE_SEARCH_WHEN_READY) { 1130 p2p_set_state(p2p, P2P_SEARCH); 1131 p2p_search(p2p); 1132 return 1; 1133 } 1134 if (p2p->state != P2P_SEARCH_WHEN_READY) 1135 return 0; 1136 p2p_dbg(p2p, "Starting pending P2P find now that previous scan was completed"); 1137 if (p2p_find(p2p, p2p->last_p2p_find_timeout, p2p->find_type, 1138 p2p->num_req_dev_types, p2p->req_dev_types, 1139 p2p->find_dev_id, p2p->search_delay) < 0) { 1140 p2p->cfg->find_stopped(p2p->cfg->cb_ctx); 1141 return 0; 1142 } 1143 return 1; 1144} 1145 1146 1147void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq) 1148{ 1149 p2p_dbg(p2p, "Stopping find"); 1150 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1151 p2p_clear_timeout(p2p); 1152 if (p2p->state == P2P_SEARCH || 1153 p2p->state == P2P_CONTINUE_SEARCH_WHEN_READY || 1154 p2p->state == P2P_SEARCH_WHEN_READY) 1155 p2p->cfg->find_stopped(p2p->cfg->cb_ctx); 1156 p2p_set_state(p2p, P2P_IDLE); 1157 p2p_free_req_dev_types(p2p); 1158 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1159 if (p2p->go_neg_peer) 1160 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1161 p2p->go_neg_peer = NULL; 1162 p2p->sd_peer = NULL; 1163 p2p->invite_peer = NULL; 1164 p2p_stop_listen_for_freq(p2p, freq); 1165} 1166 1167 1168void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq) 1169{ 1170 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) { 1171 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response"); 1172 return; 1173 } 1174 if (p2p->in_listen) { 1175 p2p->in_listen = 0; 1176 p2p_clear_timeout(p2p); 1177 } 1178 if (p2p->drv_in_listen) { 1179 /* 1180 * The driver may not deliver callback to p2p_listen_end() 1181 * when the operation gets canceled, so clear the internal 1182 * variable that is tracking driver state. 1183 */ 1184 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen); 1185 p2p->drv_in_listen = 0; 1186 } 1187 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1188} 1189 1190 1191void p2p_stop_listen(struct p2p_data *p2p) 1192{ 1193 if (p2p->state != P2P_LISTEN_ONLY) { 1194 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state."); 1195 return; 1196 } 1197 1198 p2p_stop_listen_for_freq(p2p, 0); 1199 p2p_set_state(p2p, P2P_IDLE); 1200} 1201 1202 1203void p2p_stop_find(struct p2p_data *p2p) 1204{ 1205 p2p_stop_find_for_freq(p2p, 0); 1206} 1207 1208 1209static int p2p_prepare_channel_pref(struct p2p_data *p2p, 1210 unsigned int force_freq, 1211 unsigned int pref_freq, int go) 1212{ 1213 u8 op_class, op_channel; 1214 unsigned int freq = force_freq ? force_freq : pref_freq; 1215 1216 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d", 1217 force_freq, pref_freq, go); 1218 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) { 1219 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq); 1220 return -1; 1221 } 1222 1223 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) && 1224 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class, 1225 op_channel))) { 1226 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P", 1227 freq, op_class, op_channel); 1228 return -1; 1229 } 1230 1231 p2p->op_reg_class = op_class; 1232 p2p->op_channel = op_channel; 1233 1234 if (force_freq) { 1235 p2p->channels.reg_classes = 1; 1236 p2p->channels.reg_class[0].channels = 1; 1237 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 1238 p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 1239 } else { 1240 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1241 sizeof(struct p2p_channels)); 1242 } 1243 1244 return 0; 1245} 1246 1247 1248static void p2p_prepare_channel_best(struct p2p_data *p2p) 1249{ 1250 u8 op_class, op_channel; 1251 1252 p2p_dbg(p2p, "Prepare channel best"); 1253 1254 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 && 1255 p2p_supported_freq(p2p, p2p->best_freq_overall) && 1256 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel) 1257 == 0) { 1258 p2p_dbg(p2p, "Select best overall channel as operating channel preference"); 1259 p2p->op_reg_class = op_class; 1260 p2p->op_channel = op_channel; 1261 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 && 1262 p2p_supported_freq(p2p, p2p->best_freq_5) && 1263 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel) 1264 == 0) { 1265 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference"); 1266 p2p->op_reg_class = op_class; 1267 p2p->op_channel = op_channel; 1268 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 && 1269 p2p_supported_freq(p2p, p2p->best_freq_24) && 1270 p2p_freq_to_channel(p2p->best_freq_24, &op_class, 1271 &op_channel) == 0) { 1272 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference"); 1273 p2p->op_reg_class = op_class; 1274 p2p->op_channel = op_channel; 1275 } else if (p2p->cfg->num_pref_chan > 0 && 1276 p2p_channels_includes(&p2p->cfg->channels, 1277 p2p->cfg->pref_chan[0].op_class, 1278 p2p->cfg->pref_chan[0].chan)) { 1279 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference"); 1280 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class; 1281 p2p->op_channel = p2p->cfg->pref_chan[0].chan; 1282 } else { 1283 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference"); 1284 p2p->op_reg_class = p2p->cfg->op_reg_class; 1285 p2p->op_channel = p2p->cfg->op_channel; 1286 } 1287 1288 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1289 sizeof(struct p2p_channels)); 1290} 1291 1292 1293/** 1294 * p2p_prepare_channel - Select operating channel for GO Negotiation 1295 * @p2p: P2P module context from p2p_init() 1296 * @dev: Selected peer device 1297 * @force_freq: Forced frequency in MHz or 0 if not forced 1298 * @pref_freq: Preferred frequency in MHz or 0 if no preference 1299 * @go: Whether the local end will be forced to be GO 1300 * Returns: 0 on success, -1 on failure (channel not supported for P2P) 1301 * 1302 * This function is used to do initial operating channel selection for GO 1303 * Negotiation prior to having received peer information. The selected channel 1304 * may be further optimized in p2p_reselect_channel() once the peer information 1305 * is available. 1306 */ 1307int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev, 1308 unsigned int force_freq, unsigned int pref_freq, int go) 1309{ 1310 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d", 1311 force_freq, pref_freq, go); 1312 if (force_freq || pref_freq) { 1313 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) < 1314 0) 1315 return -1; 1316 } else { 1317 p2p_prepare_channel_best(p2p); 1318 } 1319 p2p_channels_dump(p2p, "prepared channels", &p2p->channels); 1320 if (go) 1321 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq); 1322 else if (!force_freq) 1323 p2p_channels_union(&p2p->channels, &p2p->cfg->cli_channels, 1324 &p2p->channels); 1325 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels); 1326 1327 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s", 1328 p2p->op_reg_class, p2p->op_channel, 1329 force_freq ? " (forced)" : ""); 1330 1331 if (force_freq) 1332 dev->flags |= P2P_DEV_FORCE_FREQ; 1333 else 1334 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1335 1336 return 0; 1337} 1338 1339 1340static void p2p_set_dev_persistent(struct p2p_device *dev, 1341 int persistent_group) 1342{ 1343 switch (persistent_group) { 1344 case 0: 1345 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP | 1346 P2P_DEV_PREFER_PERSISTENT_RECONN); 1347 break; 1348 case 1: 1349 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP; 1350 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN; 1351 break; 1352 case 2: 1353 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP | 1354 P2P_DEV_PREFER_PERSISTENT_RECONN; 1355 break; 1356 } 1357} 1358 1359 1360int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr, 1361 enum p2p_wps_method wps_method, 1362 int go_intent, const u8 *own_interface_addr, 1363 unsigned int force_freq, int persistent_group, 1364 const u8 *force_ssid, size_t force_ssid_len, 1365 int pd_before_go_neg, unsigned int pref_freq) 1366{ 1367 struct p2p_device *dev; 1368 1369 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR 1370 " GO Intent=%d Intended Interface Address=" MACSTR 1371 " wps_method=%d persistent_group=%d pd_before_go_neg=%d", 1372 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1373 wps_method, persistent_group, pd_before_go_neg); 1374 1375 dev = p2p_get_device(p2p, peer_addr); 1376 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 1377 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR, 1378 MAC2STR(peer_addr)); 1379 return -1; 1380 } 1381 1382 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, 1383 go_intent == 15) < 0) 1384 return -1; 1385 1386 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 1387 if (!(dev->info.dev_capab & 1388 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 1389 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1390 " that is in a group and is not discoverable", 1391 MAC2STR(peer_addr)); 1392 return -1; 1393 } 1394 if (dev->oper_freq <= 0) { 1395 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1396 " with incomplete information", 1397 MAC2STR(peer_addr)); 1398 return -1; 1399 } 1400 1401 /* 1402 * First, try to connect directly. If the peer does not 1403 * acknowledge frames, assume it is sleeping and use device 1404 * discoverability via the GO at that point. 1405 */ 1406 } 1407 1408 p2p->ssid_set = 0; 1409 if (force_ssid) { 1410 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1411 force_ssid, force_ssid_len); 1412 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1413 p2p->ssid_len = force_ssid_len; 1414 p2p->ssid_set = 1; 1415 } 1416 1417 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1418 dev->flags &= ~P2P_DEV_USER_REJECTED; 1419 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 1420 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1421 if (pd_before_go_neg) 1422 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG; 1423 else { 1424 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG; 1425 /* 1426 * Assign dialog token and tie breaker here to use the same 1427 * values in each retry within the same GO Negotiation exchange. 1428 */ 1429 dev->dialog_token++; 1430 if (dev->dialog_token == 0) 1431 dev->dialog_token = 1; 1432 dev->tie_breaker = p2p->next_tie_breaker; 1433 p2p->next_tie_breaker = !p2p->next_tie_breaker; 1434 } 1435 dev->connect_reqs = 0; 1436 dev->go_neg_req_sent = 0; 1437 dev->go_state = UNKNOWN_GO; 1438 p2p_set_dev_persistent(dev, persistent_group); 1439 p2p->go_intent = go_intent; 1440 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1441 1442 if (p2p->state != P2P_IDLE) 1443 p2p_stop_find(p2p); 1444 1445 if (p2p->after_scan_tx) { 1446 /* 1447 * We need to drop the pending frame to avoid issues with the 1448 * new GO Negotiation, e.g., when the pending frame was from a 1449 * previous attempt at starting a GO Negotiation. 1450 */ 1451 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion"); 1452 os_free(p2p->after_scan_tx); 1453 p2p->after_scan_tx = NULL; 1454 } 1455 1456 dev->wps_method = wps_method; 1457 dev->status = P2P_SC_SUCCESS; 1458 1459 if (p2p->p2p_scan_running) { 1460 p2p_dbg(p2p, "p2p_scan running - delay connect send"); 1461 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT; 1462 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN); 1463 return 0; 1464 } 1465 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1466 1467 return p2p_connect_send(p2p, dev); 1468} 1469 1470 1471int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr, 1472 enum p2p_wps_method wps_method, 1473 int go_intent, const u8 *own_interface_addr, 1474 unsigned int force_freq, int persistent_group, 1475 const u8 *force_ssid, size_t force_ssid_len, 1476 unsigned int pref_freq) 1477{ 1478 struct p2p_device *dev; 1479 1480 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR 1481 " GO Intent=%d Intended Interface Address=" MACSTR 1482 " wps_method=%d persistent_group=%d", 1483 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1484 wps_method, persistent_group); 1485 1486 dev = p2p_get_device(p2p, peer_addr); 1487 if (dev == NULL) { 1488 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR, 1489 MAC2STR(peer_addr)); 1490 return -1; 1491 } 1492 1493 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent == 1494 15) < 0) 1495 return -1; 1496 1497 p2p->ssid_set = 0; 1498 if (force_ssid) { 1499 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1500 force_ssid, force_ssid_len); 1501 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1502 p2p->ssid_len = force_ssid_len; 1503 p2p->ssid_set = 1; 1504 } 1505 1506 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1507 dev->flags &= ~P2P_DEV_USER_REJECTED; 1508 dev->go_neg_req_sent = 0; 1509 dev->go_state = UNKNOWN_GO; 1510 p2p_set_dev_persistent(dev, persistent_group); 1511 p2p->go_intent = go_intent; 1512 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1513 1514 dev->wps_method = wps_method; 1515 dev->status = P2P_SC_SUCCESS; 1516 1517 return 0; 1518} 1519 1520 1521void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr, 1522 struct p2p_device *dev, struct p2p_message *msg) 1523{ 1524 os_get_time(&dev->last_seen); 1525 1526 p2p_copy_wps_info(p2p, dev, 0, msg); 1527 1528 if (msg->listen_channel) { 1529 int freq; 1530 freq = p2p_channel_to_freq(msg->listen_channel[3], 1531 msg->listen_channel[4]); 1532 if (freq < 0) { 1533 p2p_dbg(p2p, "Unknown peer Listen channel: " 1534 "country=%c%c(0x%02x) reg_class=%u channel=%u", 1535 msg->listen_channel[0], 1536 msg->listen_channel[1], 1537 msg->listen_channel[2], 1538 msg->listen_channel[3], 1539 msg->listen_channel[4]); 1540 } else { 1541 p2p_dbg(p2p, "Update peer " MACSTR 1542 " Listen channel: %u -> %u MHz", 1543 MAC2STR(dev->info.p2p_device_addr), 1544 dev->listen_freq, freq); 1545 dev->listen_freq = freq; 1546 } 1547 } 1548 1549 if (msg->wfd_subelems) { 1550 wpabuf_free(dev->info.wfd_subelems); 1551 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems); 1552 } 1553 1554 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 1555 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 1556 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request"); 1557 } else { 1558 p2p_dbg(p2p, "Created device entry based on GO Neg Req: " 1559 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' " 1560 "listen_freq=%d", 1561 MAC2STR(dev->info.p2p_device_addr), 1562 dev->info.dev_capab, dev->info.group_capab, 1563 dev->info.device_name, dev->listen_freq); 1564 } 1565 1566 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY; 1567 1568 if (dev->flags & P2P_DEV_USER_REJECTED) { 1569 p2p_dbg(p2p, "Do not report rejected device"); 1570 return; 1571 } 1572 1573 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 1574 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 1575 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 1576} 1577 1578 1579void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len) 1580{ 1581 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 1582 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2); 1583 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2], 1584 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len); 1585 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len; 1586} 1587 1588 1589int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params) 1590{ 1591 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len); 1592 p2p_random(params->passphrase, 8); 1593 return 0; 1594} 1595 1596 1597void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer) 1598{ 1599 struct p2p_go_neg_results res; 1600 int go = peer->go_state == LOCAL_GO; 1601 struct p2p_channels intersection; 1602 int freqs; 1603 size_t i, j; 1604 1605 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)", 1606 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer"); 1607 1608 os_memset(&res, 0, sizeof(res)); 1609 res.role_go = go; 1610 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 1611 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 1612 res.wps_method = peer->wps_method; 1613 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 1614 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 1615 res.persistent_group = 2; 1616 else 1617 res.persistent_group = 1; 1618 } 1619 1620 if (go) { 1621 /* Setup AP mode for WPS provisioning */ 1622 res.freq = p2p_channel_to_freq(p2p->op_reg_class, 1623 p2p->op_channel); 1624 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1625 res.ssid_len = p2p->ssid_len; 1626 p2p_random(res.passphrase, 8); 1627 } else { 1628 res.freq = peer->oper_freq; 1629 if (p2p->ssid_len) { 1630 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1631 res.ssid_len = p2p->ssid_len; 1632 } 1633 } 1634 1635 p2p_channels_dump(p2p, "own channels", &p2p->channels); 1636 p2p_channels_dump(p2p, "peer channels", &peer->channels); 1637 p2p_channels_intersect(&p2p->channels, &peer->channels, 1638 &intersection); 1639 if (go) { 1640 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq); 1641 p2p_channels_dump(p2p, "intersection after no-GO removal", 1642 &intersection); 1643 } 1644 freqs = 0; 1645 for (i = 0; i < intersection.reg_classes; i++) { 1646 struct p2p_reg_class *c = &intersection.reg_class[i]; 1647 if (freqs + 1 == P2P_MAX_CHANNELS) 1648 break; 1649 for (j = 0; j < c->channels; j++) { 1650 int freq; 1651 if (freqs + 1 == P2P_MAX_CHANNELS) 1652 break; 1653 freq = p2p_channel_to_freq(c->reg_class, c->channel[j]); 1654 if (freq < 0) 1655 continue; 1656 res.freq_list[freqs++] = freq; 1657 } 1658 } 1659 1660 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout; 1661 1662 p2p_clear_timeout(p2p); 1663 p2p->ssid_set = 0; 1664 peer->go_neg_req_sent = 0; 1665 peer->wps_method = WPS_NOT_READY; 1666 1667 p2p_set_state(p2p, P2P_PROVISIONING); 1668 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 1669} 1670 1671 1672static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa, 1673 const u8 *data, size_t len, int rx_freq) 1674{ 1675 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa)); 1676 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len); 1677 1678 if (len < 1) 1679 return; 1680 1681 switch (data[0]) { 1682 case P2P_GO_NEG_REQ: 1683 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq); 1684 break; 1685 case P2P_GO_NEG_RESP: 1686 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq); 1687 break; 1688 case P2P_GO_NEG_CONF: 1689 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1); 1690 break; 1691 case P2P_INVITATION_REQ: 1692 p2p_process_invitation_req(p2p, sa, data + 1, len - 1, 1693 rx_freq); 1694 break; 1695 case P2P_INVITATION_RESP: 1696 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 1697 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1); 1698 break; 1699 case P2P_PROV_DISC_REQ: 1700 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1701 break; 1702 case P2P_PROV_DISC_RESP: 1703 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1); 1704 break; 1705 case P2P_DEV_DISC_REQ: 1706 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1707 break; 1708 case P2P_DEV_DISC_RESP: 1709 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1); 1710 break; 1711 default: 1712 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d", 1713 data[0]); 1714 break; 1715 } 1716} 1717 1718 1719static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, 1720 const u8 *sa, const u8 *bssid, const u8 *data, 1721 size_t len, int freq) 1722{ 1723 if (len < 1) 1724 return; 1725 1726 switch (data[0]) { 1727 case WLAN_PA_VENDOR_SPECIFIC: 1728 data++; 1729 len--; 1730 if (len < 3) 1731 return; 1732 if (WPA_GET_BE24(data) != OUI_WFA) 1733 return; 1734 1735 data += 3; 1736 len -= 3; 1737 if (len < 1) 1738 return; 1739 1740 if (*data != P2P_OUI_TYPE) 1741 return; 1742 1743 p2p_rx_p2p_action(p2p, sa, data + 1, len - 1, freq); 1744 break; 1745 case WLAN_PA_GAS_INITIAL_REQ: 1746 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq); 1747 break; 1748 case WLAN_PA_GAS_INITIAL_RESP: 1749 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq); 1750 break; 1751 case WLAN_PA_GAS_COMEBACK_REQ: 1752 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq); 1753 break; 1754 case WLAN_PA_GAS_COMEBACK_RESP: 1755 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq); 1756 break; 1757 } 1758} 1759 1760 1761void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa, 1762 const u8 *bssid, u8 category, 1763 const u8 *data, size_t len, int freq) 1764{ 1765 if (category == WLAN_ACTION_PUBLIC) { 1766 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq); 1767 return; 1768 } 1769 1770 if (category != WLAN_ACTION_VENDOR_SPECIFIC) 1771 return; 1772 1773 if (len < 4) 1774 return; 1775 1776 if (WPA_GET_BE24(data) != OUI_WFA) 1777 return; 1778 data += 3; 1779 len -= 3; 1780 1781 if (*data != P2P_OUI_TYPE) 1782 return; 1783 data++; 1784 len--; 1785 1786 /* P2P action frame */ 1787 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa)); 1788 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len); 1789 1790 if (len < 1) 1791 return; 1792 switch (data[0]) { 1793 case P2P_NOA: 1794 p2p_dbg(p2p, "Received P2P Action - Notice of Absence"); 1795 /* TODO */ 1796 break; 1797 case P2P_PRESENCE_REQ: 1798 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq); 1799 break; 1800 case P2P_PRESENCE_RESP: 1801 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1); 1802 break; 1803 case P2P_GO_DISC_REQ: 1804 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq); 1805 break; 1806 default: 1807 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]); 1808 break; 1809 } 1810} 1811 1812 1813static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx) 1814{ 1815 struct p2p_data *p2p = eloop_ctx; 1816 if (p2p->go_neg_peer == NULL) 1817 return; 1818 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1819 p2p->go_neg_peer->status = P2P_SC_SUCCESS; 1820 p2p_connect_send(p2p, p2p->go_neg_peer); 1821} 1822 1823 1824static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx) 1825{ 1826 struct p2p_data *p2p = eloop_ctx; 1827 if (p2p->invite_peer == NULL) 1828 return; 1829 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1830 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr); 1831} 1832 1833 1834static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr, 1835 const u8 *ie, size_t ie_len) 1836{ 1837 struct p2p_message msg; 1838 struct p2p_device *dev; 1839 1840 os_memset(&msg, 0, sizeof(msg)); 1841 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL) 1842 { 1843 p2p_parse_free(&msg); 1844 return; /* not a P2P probe */ 1845 } 1846 1847 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 1848 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 1849 != 0) { 1850 /* The Probe Request is not part of P2P Device Discovery. It is 1851 * not known whether the source address of the frame is the P2P 1852 * Device Address or P2P Interface Address. Do not add a new 1853 * peer entry based on this frames. 1854 */ 1855 p2p_parse_free(&msg); 1856 return; 1857 } 1858 1859 dev = p2p_get_device(p2p, addr); 1860 if (dev) { 1861 if (dev->country[0] == 0 && msg.listen_channel) 1862 os_memcpy(dev->country, msg.listen_channel, 3); 1863 os_get_time(&dev->last_seen); 1864 p2p_parse_free(&msg); 1865 return; /* already known */ 1866 } 1867 1868 dev = p2p_create_device(p2p, addr); 1869 if (dev == NULL) { 1870 p2p_parse_free(&msg); 1871 return; 1872 } 1873 1874 os_get_time(&dev->last_seen); 1875 dev->flags |= P2P_DEV_PROBE_REQ_ONLY; 1876 1877 if (msg.listen_channel) { 1878 os_memcpy(dev->country, msg.listen_channel, 3); 1879 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3], 1880 msg.listen_channel[4]); 1881 } 1882 1883 p2p_copy_wps_info(p2p, dev, 1, &msg); 1884 1885 if (msg.wfd_subelems) { 1886 wpabuf_free(dev->info.wfd_subelems); 1887 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 1888 } 1889 1890 p2p_parse_free(&msg); 1891 1892 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR 1893 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d", 1894 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab, 1895 dev->info.group_capab, dev->info.device_name, 1896 dev->listen_freq); 1897} 1898 1899 1900struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p, 1901 const u8 *addr, 1902 struct p2p_message *msg) 1903{ 1904 struct p2p_device *dev; 1905 1906 dev = p2p_get_device(p2p, addr); 1907 if (dev) { 1908 os_get_time(&dev->last_seen); 1909 return dev; /* already known */ 1910 } 1911 1912 dev = p2p_create_device(p2p, addr); 1913 if (dev == NULL) 1914 return NULL; 1915 1916 p2p_add_dev_info(p2p, addr, dev, msg); 1917 1918 return dev; 1919} 1920 1921 1922static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type) 1923{ 1924 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0) 1925 return 1; 1926 if (os_memcmp(dev_type, req_dev_type, 2) == 0 && 1927 WPA_GET_BE32(&req_dev_type[2]) == 0 && 1928 WPA_GET_BE16(&req_dev_type[6]) == 0) 1929 return 1; /* Category match with wildcard OUI/sub-category */ 1930 return 0; 1931} 1932 1933 1934int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[], 1935 size_t num_req_dev_type) 1936{ 1937 size_t i; 1938 for (i = 0; i < num_req_dev_type; i++) { 1939 if (dev_type_match(dev_type, req_dev_type[i])) 1940 return 1; 1941 } 1942 return 0; 1943} 1944 1945 1946/** 1947 * p2p_match_dev_type - Match local device type with requested type 1948 * @p2p: P2P module context from p2p_init() 1949 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) 1950 * Returns: 1 on match, 0 on mismatch 1951 * 1952 * This function can be used to match the Requested Device Type attribute in 1953 * WPS IE with the local device types for deciding whether to reply to a Probe 1954 * Request frame. 1955 */ 1956int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps) 1957{ 1958 struct wps_parse_attr attr; 1959 size_t i; 1960 1961 if (wps_parse_msg(wps, &attr)) 1962 return 1; /* assume no Requested Device Type attributes */ 1963 1964 if (attr.num_req_dev_type == 0) 1965 return 1; /* no Requested Device Type attributes -> match */ 1966 1967 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type, 1968 attr.num_req_dev_type)) 1969 return 1; /* Own Primary Device Type matches */ 1970 1971 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) 1972 if (dev_type_list_match(p2p->cfg->sec_dev_type[i], 1973 attr.req_dev_type, 1974 attr.num_req_dev_type)) 1975 return 1; /* Own Secondary Device Type matches */ 1976 1977 /* No matching device type found */ 1978 return 0; 1979} 1980 1981 1982struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p) 1983{ 1984 struct wpabuf *buf; 1985 u8 *len; 1986 int pw_id = -1; 1987 size_t extra = 0; 1988 1989#ifdef CONFIG_WIFI_DISPLAY 1990 if (p2p->wfd_ie_probe_resp) 1991 extra = wpabuf_len(p2p->wfd_ie_probe_resp); 1992#endif /* CONFIG_WIFI_DISPLAY */ 1993 1994 buf = wpabuf_alloc(1000 + extra); 1995 if (buf == NULL) 1996 return NULL; 1997 1998 if (p2p->go_neg_peer) { 1999 /* Advertise immediate availability of WPS credential */ 2000 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method); 2001 } 2002 2003 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) { 2004 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response"); 2005 wpabuf_free(buf); 2006 return NULL; 2007 } 2008 2009#ifdef CONFIG_WIFI_DISPLAY 2010 if (p2p->wfd_ie_probe_resp) 2011 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp); 2012#endif /* CONFIG_WIFI_DISPLAY */ 2013 2014 /* P2P IE */ 2015 len = p2p_buf_add_ie_hdr(buf); 2016 p2p_buf_add_capability(buf, p2p->dev_capab & 2017 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2018 if (p2p->ext_listen_interval) 2019 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 2020 p2p->ext_listen_interval); 2021 p2p_buf_add_device_info(buf, p2p, NULL); 2022 p2p_buf_update_ie_hdr(buf, len); 2023 2024 return buf; 2025} 2026 2027 2028static enum p2p_probe_req_status 2029p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2030 const u8 *bssid, const u8 *ie, size_t ie_len) 2031{ 2032 struct ieee802_11_elems elems; 2033 struct wpabuf *buf; 2034 struct ieee80211_mgmt *resp; 2035 struct p2p_message msg; 2036 struct wpabuf *ies; 2037 2038 if (!p2p->in_listen || !p2p->drv_in_listen) { 2039 /* not in Listen state - ignore Probe Request */ 2040 return P2P_PREQ_NOT_LISTEN; 2041 } 2042 2043 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) == 2044 ParseFailed) { 2045 /* Ignore invalid Probe Request frames */ 2046 return P2P_PREQ_MALFORMED; 2047 } 2048 2049 if (elems.p2p == NULL) { 2050 /* not a P2P probe - ignore it */ 2051 return P2P_PREQ_NOT_P2P; 2052 } 2053 2054 if (dst && !is_broadcast_ether_addr(dst) && 2055 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2056 /* Not sent to the broadcast address or our P2P Device Address 2057 */ 2058 return P2P_PREQ_NOT_PROCESSED; 2059 } 2060 2061 if (bssid && !is_broadcast_ether_addr(bssid)) { 2062 /* Not sent to the Wildcard BSSID */ 2063 return P2P_PREQ_NOT_PROCESSED; 2064 } 2065 2066 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN || 2067 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) != 2068 0) { 2069 /* not using P2P Wildcard SSID - ignore */ 2070 return P2P_PREQ_NOT_PROCESSED; 2071 } 2072 2073 if (supp_rates_11b_only(&elems)) { 2074 /* Indicates support for 11b rates only */ 2075 return P2P_PREQ_NOT_P2P; 2076 } 2077 2078 os_memset(&msg, 0, sizeof(msg)); 2079 if (p2p_parse_ies(ie, ie_len, &msg) < 0) { 2080 /* Could not parse P2P attributes */ 2081 return P2P_PREQ_NOT_P2P; 2082 } 2083 2084 if (msg.device_id && 2085 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2086 /* Device ID did not match */ 2087 p2p_parse_free(&msg); 2088 return P2P_PREQ_NOT_PROCESSED; 2089 } 2090 2091 /* Check Requested Device Type match */ 2092 if (msg.wps_attributes && 2093 !p2p_match_dev_type(p2p, msg.wps_attributes)) { 2094 /* No match with Requested Device Type */ 2095 p2p_parse_free(&msg); 2096 return P2P_PREQ_NOT_PROCESSED; 2097 } 2098 p2p_parse_free(&msg); 2099 2100 if (!p2p->cfg->send_probe_resp) { 2101 /* Response generated elsewhere */ 2102 return P2P_PREQ_NOT_PROCESSED; 2103 } 2104 2105 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state"); 2106 2107 /* 2108 * We do not really have a specific BSS that this frame is advertising, 2109 * so build a frame that has some information in valid format. This is 2110 * really only used for discovery purposes, not to learn exact BSS 2111 * parameters. 2112 */ 2113 ies = p2p_build_probe_resp_ies(p2p); 2114 if (ies == NULL) 2115 return P2P_PREQ_NOT_PROCESSED; 2116 2117 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 2118 if (buf == NULL) { 2119 wpabuf_free(ies); 2120 return P2P_PREQ_NOT_PROCESSED; 2121 } 2122 2123 resp = NULL; 2124 resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp); 2125 2126 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 2127 (WLAN_FC_STYPE_PROBE_RESP << 4)); 2128 os_memcpy(resp->da, addr, ETH_ALEN); 2129 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN); 2130 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN); 2131 resp->u.probe_resp.beacon_int = host_to_le16(100); 2132 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 2133 resp->u.probe_resp.capab_info = 2134 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE | 2135 WLAN_CAPABILITY_PRIVACY | 2136 WLAN_CAPABILITY_SHORT_SLOT_TIME); 2137 2138 wpabuf_put_u8(buf, WLAN_EID_SSID); 2139 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN); 2140 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 2141 2142 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES); 2143 wpabuf_put_u8(buf, 8); 2144 wpabuf_put_u8(buf, (60 / 5) | 0x80); 2145 wpabuf_put_u8(buf, 90 / 5); 2146 wpabuf_put_u8(buf, (120 / 5) | 0x80); 2147 wpabuf_put_u8(buf, 180 / 5); 2148 wpabuf_put_u8(buf, (240 / 5) | 0x80); 2149 wpabuf_put_u8(buf, 360 / 5); 2150 wpabuf_put_u8(buf, 480 / 5); 2151 wpabuf_put_u8(buf, 540 / 5); 2152 2153 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS); 2154 wpabuf_put_u8(buf, 1); 2155 wpabuf_put_u8(buf, p2p->cfg->channel); 2156 2157 wpabuf_put_buf(buf, ies); 2158 wpabuf_free(ies); 2159 2160 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf); 2161 2162 wpabuf_free(buf); 2163 2164 return P2P_PREQ_NOT_PROCESSED; 2165} 2166 2167 2168enum p2p_probe_req_status 2169p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2170 const u8 *bssid, const u8 *ie, size_t ie_len) 2171{ 2172 enum p2p_probe_req_status res; 2173 2174 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len); 2175 2176 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len); 2177 2178 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) && 2179 p2p->go_neg_peer && 2180 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN) 2181 == 0 && 2182 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 2183 /* Received a Probe Request from GO Negotiation peer */ 2184 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout"); 2185 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2186 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL); 2187 return P2P_PREQ_PROCESSED; 2188 } 2189 2190 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) && 2191 p2p->invite_peer && 2192 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN) 2193 == 0) { 2194 /* Received a Probe Request from Invite peer */ 2195 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout"); 2196 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL); 2197 return P2P_PREQ_PROCESSED; 2198 } 2199 2200 return res; 2201} 2202 2203 2204static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid, 2205 u8 *buf, size_t len, struct wpabuf *p2p_ie) 2206{ 2207 struct wpabuf *tmp; 2208 u8 *lpos; 2209 size_t tmplen; 2210 int res; 2211 u8 group_capab; 2212 2213 if (p2p_ie == NULL) 2214 return 0; /* WLAN AP is not a P2P manager */ 2215 2216 /* 2217 * (Re)Association Request - P2P IE 2218 * P2P Capability attribute (shall be present) 2219 * P2P Interface attribute (present if concurrent device and 2220 * P2P Management is enabled) 2221 */ 2222 tmp = wpabuf_alloc(200); 2223 if (tmp == NULL) 2224 return -1; 2225 2226 lpos = p2p_buf_add_ie_hdr(tmp); 2227 group_capab = 0; 2228 if (p2p->num_groups > 0) { 2229 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; 2230 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2231 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) && 2232 p2p->cross_connect) 2233 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 2234 } 2235 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab); 2236 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2237 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED)) 2238 p2p_buf_add_p2p_interface(tmp, p2p); 2239 p2p_buf_update_ie_hdr(tmp, lpos); 2240 2241 tmplen = wpabuf_len(tmp); 2242 if (tmplen > len) 2243 res = -1; 2244 else { 2245 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2246 res = tmplen; 2247 } 2248 wpabuf_free(tmp); 2249 2250 return res; 2251} 2252 2253 2254int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf, 2255 size_t len, int p2p_group, struct wpabuf *p2p_ie) 2256{ 2257 struct wpabuf *tmp; 2258 u8 *lpos; 2259 struct p2p_device *peer; 2260 size_t tmplen; 2261 int res; 2262 size_t extra = 0; 2263 2264 if (!p2p_group) 2265 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie); 2266 2267#ifdef CONFIG_WIFI_DISPLAY 2268 if (p2p->wfd_ie_assoc_req) 2269 extra = wpabuf_len(p2p->wfd_ie_assoc_req); 2270#endif /* CONFIG_WIFI_DISPLAY */ 2271 2272 /* 2273 * (Re)Association Request - P2P IE 2274 * P2P Capability attribute (shall be present) 2275 * Extended Listen Timing (may be present) 2276 * P2P Device Info attribute (shall be present) 2277 */ 2278 tmp = wpabuf_alloc(200 + extra); 2279 if (tmp == NULL) 2280 return -1; 2281 2282#ifdef CONFIG_WIFI_DISPLAY 2283 if (p2p->wfd_ie_assoc_req) 2284 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req); 2285#endif /* CONFIG_WIFI_DISPLAY */ 2286 2287 peer = bssid ? p2p_get_device(p2p, bssid) : NULL; 2288 2289 lpos = p2p_buf_add_ie_hdr(tmp); 2290 p2p_buf_add_capability(tmp, p2p->dev_capab, 0); 2291 if (p2p->ext_listen_interval) 2292 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period, 2293 p2p->ext_listen_interval); 2294 p2p_buf_add_device_info(tmp, p2p, peer); 2295 p2p_buf_update_ie_hdr(tmp, lpos); 2296 2297 tmplen = wpabuf_len(tmp); 2298 if (tmplen > len) 2299 res = -1; 2300 else { 2301 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2302 res = tmplen; 2303 } 2304 wpabuf_free(tmp); 2305 2306 return res; 2307} 2308 2309 2310int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) 2311{ 2312 struct wpabuf *p2p_ie; 2313 int ret; 2314 2315 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); 2316 if (p2p_ie == NULL) 2317 return 0; 2318 2319 ret = p2p_attr_text(p2p_ie, buf, end); 2320 wpabuf_free(p2p_ie); 2321 return ret; 2322} 2323 2324 2325int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr) 2326{ 2327 struct p2p_message msg; 2328 2329 os_memset(&msg, 0, sizeof(msg)); 2330 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 2331 return -1; 2332 2333 if (msg.p2p_device_addr) { 2334 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); 2335 return 0; 2336 } else if (msg.device_id) { 2337 os_memcpy(dev_addr, msg.device_id, ETH_ALEN); 2338 return 0; 2339 } 2340 return -1; 2341} 2342 2343 2344int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr) 2345{ 2346 struct wpabuf *p2p_ie; 2347 int ret; 2348 2349 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 2350 P2P_IE_VENDOR_TYPE); 2351 if (p2p_ie == NULL) 2352 return -1; 2353 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr); 2354 wpabuf_free(p2p_ie); 2355 return ret; 2356} 2357 2358 2359static void p2p_clear_go_neg(struct p2p_data *p2p) 2360{ 2361 p2p->go_neg_peer = NULL; 2362 p2p_clear_timeout(p2p); 2363 p2p_set_state(p2p, P2P_IDLE); 2364} 2365 2366 2367void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr) 2368{ 2369 if (p2p->go_neg_peer == NULL) { 2370 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification"); 2371 return; /* No pending Group Formation */ 2372 } 2373 2374 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) != 2375 0) { 2376 p2p_dbg(p2p, "Ignore WPS registration success notification for " 2377 MACSTR " (GO Negotiation peer " MACSTR ")", 2378 MAC2STR(mac_addr), 2379 MAC2STR(p2p->go_neg_peer->intended_addr)); 2380 return; /* Ignore unexpected peer address */ 2381 } 2382 2383 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR, 2384 MAC2STR(mac_addr)); 2385 2386 p2p_clear_go_neg(p2p); 2387} 2388 2389 2390void p2p_group_formation_failed(struct p2p_data *p2p) 2391{ 2392 if (p2p->go_neg_peer == NULL) { 2393 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification"); 2394 return; /* No pending Group Formation */ 2395 } 2396 2397 p2p_dbg(p2p, "Group Formation failed with " MACSTR, 2398 MAC2STR(p2p->go_neg_peer->intended_addr)); 2399 2400 p2p_clear_go_neg(p2p); 2401} 2402 2403 2404struct p2p_data * p2p_init(const struct p2p_config *cfg) 2405{ 2406 struct p2p_data *p2p; 2407 2408 if (cfg->max_peers < 1) 2409 return NULL; 2410 2411 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg)); 2412 if (p2p == NULL) 2413 return NULL; 2414 p2p->cfg = (struct p2p_config *) (p2p + 1); 2415 os_memcpy(p2p->cfg, cfg, sizeof(*cfg)); 2416 if (cfg->dev_name) 2417 p2p->cfg->dev_name = os_strdup(cfg->dev_name); 2418 if (cfg->manufacturer) 2419 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer); 2420 if (cfg->model_name) 2421 p2p->cfg->model_name = os_strdup(cfg->model_name); 2422 if (cfg->model_number) 2423 p2p->cfg->model_number = os_strdup(cfg->model_number); 2424 if (cfg->serial_number) 2425 p2p->cfg->serial_number = os_strdup(cfg->serial_number); 2426 if (cfg->pref_chan) { 2427 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan * 2428 sizeof(struct p2p_channel)); 2429 if (p2p->cfg->pref_chan) { 2430 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan, 2431 cfg->num_pref_chan * 2432 sizeof(struct p2p_channel)); 2433 } else 2434 p2p->cfg->num_pref_chan = 0; 2435 } 2436 2437#ifdef ANDROID_P2P 2438 /* 100ms listen time is too less to receive the response frames in some scenarios 2439 * increasing min listen time to 200ms. 2440 */ 2441 p2p->min_disc_int = 2; 2442 /* SD_FAIR_POLICY: Initializing the SD current serviced pointer to NULL */ 2443 p2p->sd_dev_list = NULL; 2444#else 2445 p2p->min_disc_int = 1; 2446#endif 2447 p2p->max_disc_int = 3; 2448 p2p->max_disc_tu = -1; 2449 2450 os_get_random(&p2p->next_tie_breaker, 1); 2451 p2p->next_tie_breaker &= 0x01; 2452 if (cfg->sd_request) 2453 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 2454 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE; 2455 if (cfg->concurrent_operations) 2456 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER; 2457 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 2458 2459 dl_list_init(&p2p->devices); 2460 2461 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 2462 p2p_expiration_timeout, p2p, NULL); 2463 2464 p2p->go_timeout = 100; 2465 p2p->client_timeout = 20; 2466 2467 p2p_dbg(p2p, "initialized"); 2468 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 2469 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 2470 2471 return p2p; 2472} 2473 2474 2475void p2p_deinit(struct p2p_data *p2p) 2476{ 2477#ifdef CONFIG_WIFI_DISPLAY 2478 wpabuf_free(p2p->wfd_ie_beacon); 2479 wpabuf_free(p2p->wfd_ie_probe_req); 2480 wpabuf_free(p2p->wfd_ie_probe_resp); 2481 wpabuf_free(p2p->wfd_ie_assoc_req); 2482 wpabuf_free(p2p->wfd_ie_invitation); 2483 wpabuf_free(p2p->wfd_ie_prov_disc_req); 2484 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 2485 wpabuf_free(p2p->wfd_ie_go_neg); 2486 wpabuf_free(p2p->wfd_dev_info); 2487 wpabuf_free(p2p->wfd_assoc_bssid); 2488 wpabuf_free(p2p->wfd_coupled_sink_info); 2489#endif /* CONFIG_WIFI_DISPLAY */ 2490 2491 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL); 2492 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 2493 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2494 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2495 p2p_flush(p2p); 2496 p2p_free_req_dev_types(p2p); 2497 os_free(p2p->cfg->dev_name); 2498 os_free(p2p->cfg->manufacturer); 2499 os_free(p2p->cfg->model_name); 2500 os_free(p2p->cfg->model_number); 2501 os_free(p2p->cfg->serial_number); 2502 os_free(p2p->cfg->pref_chan); 2503 os_free(p2p->groups); 2504 wpabuf_free(p2p->sd_resp); 2505 os_free(p2p->after_scan_tx); 2506 p2p_remove_wps_vendor_extensions(p2p); 2507 os_free(p2p->no_go_freq.range); 2508 os_free(p2p); 2509} 2510 2511 2512void p2p_flush(struct p2p_data *p2p) 2513{ 2514 struct p2p_device *dev, *prev; 2515 p2p_stop_find(p2p); 2516 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device, 2517 list) { 2518 dl_list_del(&dev->list); 2519 p2p_device_free(p2p, dev); 2520 } 2521#ifdef ANDROID_P2P 2522 /* SD_FAIR_POLICY: Initializing the SD current serviced pointer to NULL */ 2523 p2p->sd_dev_list = NULL; 2524#endif 2525 p2p_free_sd_queries(p2p); 2526 os_free(p2p->after_scan_tx); 2527 p2p->after_scan_tx = NULL; 2528} 2529 2530 2531int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr) 2532{ 2533 struct p2p_device *dev; 2534 2535 dev = p2p_get_device(p2p, addr); 2536 if (dev == NULL) 2537 return -1; 2538 2539 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr)); 2540 2541 if (p2p->go_neg_peer == dev) 2542 p2p->go_neg_peer = NULL; 2543 2544 dev->wps_method = WPS_NOT_READY; 2545 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 2546 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 2547 2548 /* Check if after_scan_tx is for this peer. If so free it */ 2549 if (p2p->after_scan_tx && 2550 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) { 2551 os_free(p2p->after_scan_tx); 2552 p2p->after_scan_tx = NULL; 2553 } 2554 2555 return 0; 2556} 2557 2558 2559int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name) 2560{ 2561 os_free(p2p->cfg->dev_name); 2562 if (dev_name) { 2563 p2p->cfg->dev_name = os_strdup(dev_name); 2564 if (p2p->cfg->dev_name == NULL) 2565 return -1; 2566 } else 2567 p2p->cfg->dev_name = NULL; 2568 return 0; 2569} 2570 2571 2572int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer) 2573{ 2574 os_free(p2p->cfg->manufacturer); 2575 p2p->cfg->manufacturer = NULL; 2576 if (manufacturer) { 2577 p2p->cfg->manufacturer = os_strdup(manufacturer); 2578 if (p2p->cfg->manufacturer == NULL) 2579 return -1; 2580 } 2581 2582 return 0; 2583} 2584 2585 2586int p2p_set_model_name(struct p2p_data *p2p, const char *model_name) 2587{ 2588 os_free(p2p->cfg->model_name); 2589 p2p->cfg->model_name = NULL; 2590 if (model_name) { 2591 p2p->cfg->model_name = os_strdup(model_name); 2592 if (p2p->cfg->model_name == NULL) 2593 return -1; 2594 } 2595 2596 return 0; 2597} 2598 2599 2600int p2p_set_model_number(struct p2p_data *p2p, const char *model_number) 2601{ 2602 os_free(p2p->cfg->model_number); 2603 p2p->cfg->model_number = NULL; 2604 if (model_number) { 2605 p2p->cfg->model_number = os_strdup(model_number); 2606 if (p2p->cfg->model_number == NULL) 2607 return -1; 2608 } 2609 2610 return 0; 2611} 2612 2613 2614int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number) 2615{ 2616 os_free(p2p->cfg->serial_number); 2617 p2p->cfg->serial_number = NULL; 2618 if (serial_number) { 2619 p2p->cfg->serial_number = os_strdup(serial_number); 2620 if (p2p->cfg->serial_number == NULL) 2621 return -1; 2622 } 2623 2624 return 0; 2625} 2626 2627 2628void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods) 2629{ 2630 p2p->cfg->config_methods = config_methods; 2631} 2632 2633 2634void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid) 2635{ 2636 os_memcpy(p2p->cfg->uuid, uuid, 16); 2637} 2638 2639 2640int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type) 2641{ 2642 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8); 2643 return 0; 2644} 2645 2646 2647int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8], 2648 size_t num_dev_types) 2649{ 2650 if (num_dev_types > P2P_SEC_DEVICE_TYPES) 2651 num_dev_types = P2P_SEC_DEVICE_TYPES; 2652 p2p->cfg->num_sec_dev_types = num_dev_types; 2653 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8); 2654 return 0; 2655} 2656 2657 2658void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p) 2659{ 2660 int i; 2661 2662 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2663 wpabuf_free(p2p->wps_vendor_ext[i]); 2664 p2p->wps_vendor_ext[i] = NULL; 2665 } 2666} 2667 2668 2669int p2p_add_wps_vendor_extension(struct p2p_data *p2p, 2670 const struct wpabuf *vendor_ext) 2671{ 2672 int i; 2673 2674 if (vendor_ext == NULL) 2675 return -1; 2676 2677 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2678 if (p2p->wps_vendor_ext[i] == NULL) 2679 break; 2680 } 2681 if (i >= P2P_MAX_WPS_VENDOR_EXT) 2682 return -1; 2683 2684 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext); 2685 if (p2p->wps_vendor_ext[i] == NULL) 2686 return -1; 2687 2688 return 0; 2689} 2690 2691 2692int p2p_set_country(struct p2p_data *p2p, const char *country) 2693{ 2694 os_memcpy(p2p->cfg->country, country, 3); 2695 return 0; 2696} 2697 2698 2699void p2p_continue_find(struct p2p_data *p2p) 2700{ 2701 struct p2p_device *dev; 2702#ifdef ANDROID_P2P 2703 int skip=1; 2704#endif 2705 p2p_set_state(p2p, P2P_SEARCH); 2706 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2707#ifdef ANDROID_P2P 2708 /* SD_FAIR_POLICY: We need to give chance to all devices in the device list 2709 * There may be a scenario, where a particular peer device have 2710 * not registered any query response. When we send a SD request to such device, 2711 * no response will be received. And if we continue to get probe responses from that device, 2712 * and if that device happens to be on top in our device list, 2713 * we will always continue to send SD requests always to that peer only. 2714 * We will not be able to send SD requests to other devices in that case. 2715 * This implementation keeps track of last serviced peer device. 2716 * And then takes the next one from the device list, in the next iteration. 2717 */ 2718 if (p2p->sd_dev_list && p2p->sd_dev_list != &p2p->devices) { 2719 if(skip) { 2720 if ((&dev->list == p2p->sd_dev_list) ) { 2721 skip = 0; 2722 if (dev->list.next == &p2p->devices) 2723 p2p->sd_dev_list = NULL; 2724 } 2725 continue; 2726 } 2727 } 2728 p2p->sd_dev_list = &dev->list; 2729 wpa_printf(MSG_DEBUG, "P2P: ### Servicing %p dev->flags 0x%x SD schedule %s devaddr " MACSTR, 2730 p2p->sd_dev_list, dev->flags, dev->flags & P2P_DEV_SD_SCHEDULE ? "TRUE": "FALSE", 2731 MAC2STR(dev->info.p2p_device_addr)); 2732#endif 2733 if (dev->flags & P2P_DEV_SD_SCHEDULE) { 2734 if (p2p_start_sd(p2p, dev) == 0) 2735 return; 2736 else 2737 break; 2738 } else if (dev->req_config_methods && 2739 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) { 2740 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 2741 MACSTR " (config methods 0x%x)", 2742 MAC2STR(dev->info.p2p_device_addr), 2743 dev->req_config_methods); 2744 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0) 2745 return; 2746 } 2747 } 2748 2749 p2p_listen_in_find(p2p, 1); 2750} 2751 2752 2753static void p2p_sd_cb(struct p2p_data *p2p, int success) 2754{ 2755 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d", 2756 success); 2757 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2758 2759 if (!success) { 2760 if (p2p->sd_peer) { 2761 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE; 2762 p2p->sd_peer = NULL; 2763 } 2764 p2p_continue_find(p2p); 2765 return; 2766 } 2767 2768 if (p2p->sd_peer == NULL) { 2769 p2p_dbg(p2p, "No SD peer entry known"); 2770 p2p_continue_find(p2p); 2771 return; 2772 } 2773 2774 /* Wait for response from the peer */ 2775 p2p_set_state(p2p, P2P_SD_DURING_FIND); 2776 p2p_set_timeout(p2p, 0, 200000); 2777} 2778 2779 2780/** 2781 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state 2782 * @p2p: P2P module context from p2p_init() 2783 */ 2784static void p2p_retry_pd(struct p2p_data *p2p) 2785{ 2786 struct p2p_device *dev; 2787 2788 if (p2p->state != P2P_IDLE) 2789 return; 2790 2791 /* 2792 * Retry the prov disc req attempt only for the peer that the user had 2793 * requested. 2794 */ 2795 2796 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2797 if (os_memcmp(p2p->pending_pd_devaddr, 2798 dev->info.p2p_device_addr, ETH_ALEN) != 0) 2799 continue; 2800 if (!dev->req_config_methods) 2801 continue; 2802 2803 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 2804 MACSTR " (config methods 0x%x)", 2805 MAC2STR(dev->info.p2p_device_addr), 2806 dev->req_config_methods); 2807 p2p_send_prov_disc_req(p2p, dev, 2808 dev->flags & P2P_DEV_PD_FOR_JOIN, 2809 p2p->pd_force_freq); 2810 return; 2811 } 2812} 2813 2814 2815static void p2p_prov_disc_cb(struct p2p_data *p2p, int success) 2816{ 2817 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d", 2818 success); 2819 2820 /* 2821 * Postpone resetting the pending action state till after we actually 2822 * time out. This allows us to take some action like notifying any 2823 * interested parties about no response to the request. 2824 * 2825 * When the timer (below) goes off we check in IDLE, SEARCH, or 2826 * LISTEN_ONLY state, which are the only allowed states to issue a PD 2827 * requests in, if this was still pending and then raise notification. 2828 */ 2829 2830 if (!success) { 2831 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2832 2833 if (p2p->user_initiated_pd && 2834 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY)) 2835 { 2836 /* Retry request from timeout to avoid busy loops */ 2837 p2p->pending_action_state = P2P_PENDING_PD; 2838 p2p_set_timeout(p2p, 0, 50000); 2839 } else if (p2p->state != P2P_IDLE) 2840 p2p_continue_find(p2p); 2841 else if (p2p->user_initiated_pd) { 2842 p2p->pending_action_state = P2P_PENDING_PD; 2843#ifdef ANDROID_P2P 2844 p2p_set_timeout(p2p, 0, 350000); 2845#else 2846 p2p_set_timeout(p2p, 0, 300000); 2847#endif 2848 } 2849 return; 2850 } 2851 2852 /* 2853 * This postponing, of resetting pending_action_state, needs to be 2854 * done only for user initiated PD requests and not internal ones. 2855 */ 2856 if (p2p->user_initiated_pd) 2857 p2p->pending_action_state = P2P_PENDING_PD; 2858 else 2859 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2860 2861 /* Wait for response from the peer */ 2862 if (p2p->state == P2P_SEARCH) 2863 p2p_set_state(p2p, P2P_PD_DURING_FIND); 2864#ifdef ANDROID_P2P 2865 p2p_set_timeout(p2p, 0, 350000); 2866#else 2867 p2p_set_timeout(p2p, 0, 200000); 2868#endif 2869} 2870 2871 2872int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq, 2873 struct os_time *rx_time, int level, const u8 *ies, 2874 size_t ies_len) 2875{ 2876 if (os_time_before(rx_time, &p2p->find_start)) { 2877 /* 2878 * The driver may have cached (e.g., in cfg80211 BSS table) the 2879 * scan results for relatively long time. To avoid reporting 2880 * stale information, update P2P peers only based on results 2881 * that have based on frames received after the last p2p_find 2882 * operation was started. 2883 */ 2884 p2p_dbg(p2p, "Ignore old scan result for " MACSTR 2885 " (rx_time=%u.%06u)", 2886 MAC2STR(bssid), (unsigned int) rx_time->sec, 2887 (unsigned int) rx_time->usec); 2888 return 0; 2889 } 2890 2891 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1); 2892 2893 return 0; 2894} 2895 2896 2897void p2p_scan_res_handled(struct p2p_data *p2p) 2898{ 2899 if (!p2p->p2p_scan_running) { 2900 p2p_dbg(p2p, "p2p_scan was not running, but scan results received"); 2901 } 2902 p2p->p2p_scan_running = 0; 2903 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2904 2905 if (p2p_run_after_scan(p2p)) 2906 return; 2907 if (p2p->state == P2P_SEARCH) 2908 p2p_continue_find(p2p); 2909} 2910 2911 2912void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id) 2913{ 2914 u8 *len; 2915 2916#ifdef CONFIG_WIFI_DISPLAY 2917 if (p2p->wfd_ie_probe_req) 2918 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req); 2919#endif /* CONFIG_WIFI_DISPLAY */ 2920 2921 len = p2p_buf_add_ie_hdr(ies); 2922 p2p_buf_add_capability(ies, p2p->dev_capab & 2923 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2924 if (dev_id) 2925 p2p_buf_add_device_id(ies, dev_id); 2926 if (p2p->cfg->reg_class && p2p->cfg->channel) 2927 p2p_buf_add_listen_channel(ies, p2p->cfg->country, 2928 p2p->cfg->reg_class, 2929 p2p->cfg->channel); 2930 if (p2p->ext_listen_interval) 2931 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period, 2932 p2p->ext_listen_interval); 2933 /* TODO: p2p_buf_add_operating_channel() if GO */ 2934 p2p_buf_update_ie_hdr(ies, len); 2935} 2936 2937 2938size_t p2p_scan_ie_buf_len(struct p2p_data *p2p) 2939{ 2940 size_t len = 100; 2941 2942#ifdef CONFIG_WIFI_DISPLAY 2943 if (p2p && p2p->wfd_ie_probe_req) 2944 len += wpabuf_len(p2p->wfd_ie_probe_req); 2945#endif /* CONFIG_WIFI_DISPLAY */ 2946 2947 return len; 2948} 2949 2950 2951int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end) 2952{ 2953 return p2p_attr_text(p2p_ie, buf, end); 2954} 2955 2956 2957static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success) 2958{ 2959 struct p2p_device *dev = p2p->go_neg_peer; 2960 int timeout; 2961 2962 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success); 2963 2964 if (dev == NULL) { 2965 p2p_dbg(p2p, "No pending GO Negotiation"); 2966 return; 2967 } 2968 2969 if (success) { 2970 if (dev->flags & P2P_DEV_USER_REJECTED) { 2971 p2p_set_state(p2p, P2P_IDLE); 2972 return; 2973 } 2974 } else if (dev->go_neg_req_sent) { 2975 /* Cancel the increment from p2p_connect_send() on failure */ 2976 dev->go_neg_req_sent--; 2977 } 2978 2979 if (!success && 2980 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) && 2981 !is_zero_ether_addr(dev->member_in_go_dev)) { 2982 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO", 2983 MAC2STR(dev->info.p2p_device_addr)); 2984 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 2985 p2p_send_dev_disc_req(p2p, dev); 2986 return; 2987 } 2988 2989 /* 2990 * Use P2P find, if needed, to find the other device from its listen 2991 * channel. 2992 */ 2993 p2p_set_state(p2p, P2P_CONNECT); 2994 timeout = success ? 500000 : 100000; 2995 if (!success && p2p->go_neg_peer && 2996 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) { 2997 unsigned int r; 2998 /* 2999 * Peer is expected to wait our response and we will skip the 3000 * listen phase. Add some randomness to the wait time here to 3001 * make it less likely to hit cases where we could end up in 3002 * sync with peer not listening. 3003 */ 3004 os_get_random((u8 *) &r, sizeof(r)); 3005 timeout += r % 100000; 3006 } 3007 p2p_set_timeout(p2p, 0, timeout); 3008} 3009 3010 3011static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success) 3012{ 3013 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d", 3014 success); 3015 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) { 3016 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore"); 3017 return; 3018 } 3019 p2p_set_state(p2p, P2P_CONNECT); 3020 p2p_set_timeout(p2p, 0, 500000); 3021} 3022 3023 3024static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success, 3025 const u8 *addr) 3026{ 3027 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success); 3028 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) { 3029 p2p_go_neg_failed(p2p, p2p->go_neg_peer, 3030 p2p->go_neg_peer->status); 3031 } else if (success) { 3032 struct p2p_device *dev; 3033 dev = p2p_get_device(p2p, addr); 3034 if (dev && 3035 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) 3036 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE; 3037 } 3038} 3039 3040 3041static void p2p_go_neg_conf_cb(struct p2p_data *p2p, 3042 enum p2p_send_action_result result) 3043{ 3044 struct p2p_device *dev; 3045 3046 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result); 3047 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3048 if (result == P2P_SEND_ACTION_FAILED) { 3049 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3050 return; 3051 } 3052 if (result == P2P_SEND_ACTION_NO_ACK) { 3053 /* 3054 * It looks like the TX status for GO Negotiation Confirm is 3055 * often showing failure even when the peer has actually 3056 * received the frame. Since the peer may change channels 3057 * immediately after having received the frame, we may not see 3058 * an Ack for retries, so just dropping a single frame may 3059 * trigger this. To allow the group formation to succeed if the 3060 * peer did indeed receive the frame, continue regardless of 3061 * the TX status. 3062 */ 3063 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported"); 3064 } 3065 3066 dev = p2p->go_neg_peer; 3067 if (dev == NULL) 3068 return; 3069 3070 p2p_go_complete(p2p, dev); 3071} 3072 3073 3074void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 3075 const u8 *src, const u8 *bssid, 3076 enum p2p_send_action_result result) 3077{ 3078 enum p2p_pending_action_state state; 3079 int success; 3080 3081 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR 3082 " src=" MACSTR " bssid=" MACSTR " result=%d", 3083 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), 3084 MAC2STR(bssid), result); 3085 success = result == P2P_SEND_ACTION_SUCCESS; 3086 state = p2p->pending_action_state; 3087 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3088 switch (state) { 3089 case P2P_NO_PENDING_ACTION: 3090 if (p2p->after_scan_tx_in_progress) { 3091 p2p->after_scan_tx_in_progress = 0; 3092 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING && 3093 p2p_run_after_scan(p2p)) 3094 break; 3095 if (p2p->state == P2P_SEARCH) { 3096 p2p_dbg(p2p, "Continue find after after_scan_tx completion"); 3097 p2p_continue_find(p2p); 3098 } 3099 } 3100 break; 3101 case P2P_PENDING_GO_NEG_REQUEST: 3102 p2p_go_neg_req_cb(p2p, success); 3103 break; 3104 case P2P_PENDING_GO_NEG_RESPONSE: 3105 p2p_go_neg_resp_cb(p2p, success); 3106 break; 3107 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE: 3108 p2p_go_neg_resp_failure_cb(p2p, success, dst); 3109 break; 3110 case P2P_PENDING_GO_NEG_CONFIRM: 3111 p2p_go_neg_conf_cb(p2p, result); 3112 break; 3113 case P2P_PENDING_SD: 3114 p2p_sd_cb(p2p, success); 3115 break; 3116 case P2P_PENDING_PD: 3117 p2p_prov_disc_cb(p2p, success); 3118 break; 3119 case P2P_PENDING_INVITATION_REQUEST: 3120 p2p_invitation_req_cb(p2p, success); 3121 break; 3122 case P2P_PENDING_INVITATION_RESPONSE: 3123 p2p_invitation_resp_cb(p2p, success); 3124 break; 3125 case P2P_PENDING_DEV_DISC_REQUEST: 3126 p2p_dev_disc_req_cb(p2p, success); 3127 break; 3128 case P2P_PENDING_DEV_DISC_RESPONSE: 3129 p2p_dev_disc_resp_cb(p2p, success); 3130 break; 3131 case P2P_PENDING_GO_DISC_REQ: 3132 p2p_go_disc_req_cb(p2p, success); 3133 break; 3134 } 3135 3136 p2p->after_scan_tx_in_progress = 0; 3137} 3138 3139 3140void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq, 3141 unsigned int duration) 3142{ 3143 if (freq == p2p->pending_client_disc_freq) { 3144 p2p_dbg(p2p, "Client discoverability remain-awake completed"); 3145 p2p->pending_client_disc_freq = 0; 3146 return; 3147 } 3148 3149 if (freq != p2p->pending_listen_freq) { 3150 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)", 3151 freq, duration, p2p->pending_listen_freq); 3152 return; 3153 } 3154 3155 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback", 3156 p2p->pending_listen_sec, p2p->pending_listen_usec, 3157 p2p->pending_listen_freq); 3158 p2p->in_listen = 1; 3159 p2p->drv_in_listen = freq; 3160 if (p2p->pending_listen_sec || p2p->pending_listen_usec) { 3161 /* 3162 * Add 20 msec extra wait to avoid race condition with driver 3163 * remain-on-channel end event, i.e., give driver more time to 3164 * complete the operation before our timeout expires. 3165 */ 3166 p2p_set_timeout(p2p, p2p->pending_listen_sec, 3167 p2p->pending_listen_usec + 20000); 3168 } 3169 3170 p2p->pending_listen_freq = 0; 3171} 3172 3173 3174int p2p_listen_end(struct p2p_data *p2p, unsigned int freq) 3175{ 3176 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq); 3177 p2p->drv_in_listen = 0; 3178 if (p2p->in_listen) 3179 return 0; /* Internal timeout will trigger the next step */ 3180 3181 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) { 3182 if (p2p->go_neg_peer->connect_reqs >= 120) { 3183 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3184 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3185 return 0; 3186 } 3187 3188 p2p_set_state(p2p, P2P_CONNECT); 3189 p2p_connect_send(p2p, p2p->go_neg_peer); 3190 return 1; 3191 } else if (p2p->state == P2P_SEARCH) { 3192 if (p2p->p2p_scan_running) { 3193 /* 3194 * Search is already in progress. This can happen if 3195 * an Action frame RX is reported immediately after 3196 * the end of a remain-on-channel operation and the 3197 * response frame to that is sent using an offchannel 3198 * operation while in p2p_find. Avoid an attempt to 3199 * restart a scan here. 3200 */ 3201 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one"); 3202 return 1; 3203 } 3204 if (p2p->pending_listen_freq) { 3205 /* 3206 * Better wait a bit if the driver is unable to start 3207 * offchannel operation for some reason. p2p_search() 3208 * will be started from internal timeout. 3209 */ 3210 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop"); 3211 p2p_set_timeout(p2p, 0, 100000); 3212 return 1; 3213 } 3214 if (p2p->search_delay) { 3215 p2p_dbg(p2p, "Delay search operation by %u ms", 3216 p2p->search_delay); 3217 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3218 (p2p->search_delay % 1000) * 1000); 3219 return 1; 3220 } 3221 p2p_search(p2p); 3222 return 1; 3223 } 3224 3225 return 0; 3226} 3227 3228 3229static void p2p_timeout_connect(struct p2p_data *p2p) 3230{ 3231 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3232 if (p2p->go_neg_peer && 3233 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 3234 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed"); 3235 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3236 return; 3237 } 3238 if (p2p->go_neg_peer && 3239 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) && 3240 p2p->go_neg_peer->connect_reqs < 120) { 3241 p2p_dbg(p2p, "Peer expected to wait our response - skip listen"); 3242 p2p_connect_send(p2p, p2p->go_neg_peer); 3243 return; 3244 } 3245 3246 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3247 p2p_listen_in_find(p2p, 0); 3248} 3249 3250 3251static void p2p_timeout_connect_listen(struct p2p_data *p2p) 3252{ 3253 if (p2p->go_neg_peer) { 3254 if (p2p->drv_in_listen) { 3255 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete"); 3256 return; 3257 } 3258 3259 if (p2p->go_neg_peer->connect_reqs >= 120) { 3260 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3261 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3262 return; 3263 } 3264 3265 p2p_set_state(p2p, P2P_CONNECT); 3266 p2p_connect_send(p2p, p2p->go_neg_peer); 3267 } else 3268 p2p_set_state(p2p, P2P_IDLE); 3269} 3270 3271 3272static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p) 3273{ 3274 /* 3275 * TODO: could remain constantly in Listen state for some time if there 3276 * are no other concurrent uses for the radio. For now, go to listen 3277 * state once per second to give other uses a chance to use the radio. 3278 */ 3279 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 3280 p2p_set_timeout(p2p, 0, 500000); 3281} 3282 3283 3284static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p) 3285{ 3286 struct p2p_device *dev = p2p->go_neg_peer; 3287 3288 if (dev == NULL) { 3289 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait"); 3290 return; 3291 } 3292 3293 dev->wait_count++; 3294 if (dev->wait_count >= 120) { 3295 p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation"); 3296 p2p_go_neg_failed(p2p, dev, -1); 3297 return; 3298 } 3299 3300 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation"); 3301 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT); 3302 p2p_listen_in_find(p2p, 0); 3303} 3304 3305 3306static void p2p_timeout_sd_during_find(struct p2p_data *p2p) 3307{ 3308 p2p_dbg(p2p, "Service Discovery Query timeout"); 3309 if (p2p->sd_peer) { 3310 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3311 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE; 3312 p2p->sd_peer = NULL; 3313 } 3314 p2p_continue_find(p2p); 3315} 3316 3317 3318static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p) 3319{ 3320 p2p_dbg(p2p, "Provision Discovery Request timeout"); 3321 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3322 p2p_continue_find(p2p); 3323} 3324 3325 3326static void p2p_timeout_prov_disc_req(struct p2p_data *p2p) 3327{ 3328 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3329 3330 /* 3331 * For user initiated PD requests that we have not gotten any responses 3332 * for while in IDLE state, we retry them a couple of times before 3333 * giving up. 3334 */ 3335 if (!p2p->user_initiated_pd) 3336 return; 3337 3338 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout"); 3339 3340 if (p2p->pd_retries) { 3341 p2p->pd_retries--; 3342 p2p_retry_pd(p2p); 3343 } else { 3344 struct p2p_device *dev; 3345 int for_join = 0; 3346 3347 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3348 if (os_memcmp(p2p->pending_pd_devaddr, 3349 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3350 continue; 3351 if (dev->req_config_methods && 3352 (dev->flags & P2P_DEV_PD_FOR_JOIN)) 3353 for_join = 1; 3354 } 3355 3356 if (p2p->cfg->prov_disc_fail) 3357 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, 3358 p2p->pending_pd_devaddr, 3359 for_join ? 3360 P2P_PROV_DISC_TIMEOUT_JOIN : 3361 P2P_PROV_DISC_TIMEOUT); 3362 p2p_reset_pending_pd(p2p); 3363 } 3364} 3365 3366 3367static void p2p_timeout_invite(struct p2p_data *p2p) 3368{ 3369 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3370 p2p_set_state(p2p, P2P_INVITE_LISTEN); 3371 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 3372 /* 3373 * Better remain on operating channel instead of listen channel 3374 * when running a group. 3375 */ 3376 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel"); 3377 p2p_set_timeout(p2p, 0, 100000); 3378 return; 3379 } 3380 p2p_listen_in_find(p2p, 0); 3381} 3382 3383 3384static void p2p_timeout_invite_listen(struct p2p_data *p2p) 3385{ 3386 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) { 3387 p2p_set_state(p2p, P2P_INVITE); 3388 p2p_invite_send(p2p, p2p->invite_peer, 3389 p2p->invite_go_dev_addr); 3390 } else { 3391 if (p2p->invite_peer) { 3392 p2p_dbg(p2p, "Invitation Request retry limit reached"); 3393 if (p2p->cfg->invitation_result) 3394 p2p->cfg->invitation_result( 3395 p2p->cfg->cb_ctx, -1, NULL, NULL, 3396 p2p->invite_peer->info.p2p_device_addr); 3397 } 3398 p2p_set_state(p2p, P2P_IDLE); 3399 } 3400} 3401 3402 3403static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx) 3404{ 3405 struct p2p_data *p2p = eloop_ctx; 3406 3407 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state)); 3408 3409 p2p->in_listen = 0; 3410 3411 switch (p2p->state) { 3412 case P2P_IDLE: 3413 /* Check if we timed out waiting for PD req */ 3414 if (p2p->pending_action_state == P2P_PENDING_PD) 3415 p2p_timeout_prov_disc_req(p2p); 3416 break; 3417 case P2P_SEARCH: 3418 /* Check if we timed out waiting for PD req */ 3419 if (p2p->pending_action_state == P2P_PENDING_PD) 3420 p2p_timeout_prov_disc_req(p2p); 3421 if (p2p->search_delay && !p2p->in_search_delay) { 3422 p2p_dbg(p2p, "Delay search operation by %u ms", 3423 p2p->search_delay); 3424 p2p->in_search_delay = 1; 3425 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3426 (p2p->search_delay % 1000) * 1000); 3427 break; 3428 } 3429 p2p->in_search_delay = 0; 3430 p2p_search(p2p); 3431 break; 3432 case P2P_CONNECT: 3433 p2p_timeout_connect(p2p); 3434 break; 3435 case P2P_CONNECT_LISTEN: 3436 p2p_timeout_connect_listen(p2p); 3437 break; 3438 case P2P_GO_NEG: 3439 break; 3440 case P2P_LISTEN_ONLY: 3441 /* Check if we timed out waiting for PD req */ 3442 if (p2p->pending_action_state == P2P_PENDING_PD) 3443 p2p_timeout_prov_disc_req(p2p); 3444 3445 if (p2p->ext_listen_only) { 3446 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed"); 3447 p2p->ext_listen_only = 0; 3448 p2p_set_state(p2p, P2P_IDLE); 3449 } 3450 break; 3451 case P2P_WAIT_PEER_CONNECT: 3452 p2p_timeout_wait_peer_connect(p2p); 3453 break; 3454 case P2P_WAIT_PEER_IDLE: 3455 p2p_timeout_wait_peer_idle(p2p); 3456 break; 3457 case P2P_SD_DURING_FIND: 3458 p2p_timeout_sd_during_find(p2p); 3459 break; 3460 case P2P_PROVISIONING: 3461 break; 3462 case P2P_PD_DURING_FIND: 3463 p2p_timeout_prov_disc_during_find(p2p); 3464 break; 3465 case P2P_INVITE: 3466 p2p_timeout_invite(p2p); 3467 break; 3468 case P2P_INVITE_LISTEN: 3469 p2p_timeout_invite_listen(p2p); 3470 break; 3471 case P2P_SEARCH_WHEN_READY: 3472 break; 3473 case P2P_CONTINUE_SEARCH_WHEN_READY: 3474 break; 3475 } 3476} 3477 3478 3479int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr) 3480{ 3481 struct p2p_device *dev; 3482 3483 dev = p2p_get_device(p2p, peer_addr); 3484 p2p_dbg(p2p, "Local request to reject connection attempts by peer " 3485 MACSTR, MAC2STR(peer_addr)); 3486 if (dev == NULL) { 3487 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr)); 3488 return -1; 3489 } 3490 dev->status = P2P_SC_FAIL_REJECTED_BY_USER; 3491 dev->flags |= P2P_DEV_USER_REJECTED; 3492 return 0; 3493} 3494 3495 3496const char * p2p_wps_method_text(enum p2p_wps_method method) 3497{ 3498 switch (method) { 3499 case WPS_NOT_READY: 3500 return "not-ready"; 3501 case WPS_PIN_DISPLAY: 3502 return "Display"; 3503 case WPS_PIN_KEYPAD: 3504 return "Keypad"; 3505 case WPS_PBC: 3506 return "PBC"; 3507 } 3508 3509 return "??"; 3510} 3511 3512 3513static const char * p2p_go_state_text(enum p2p_go_state go_state) 3514{ 3515 switch (go_state) { 3516 case UNKNOWN_GO: 3517 return "unknown"; 3518 case LOCAL_GO: 3519 return "local"; 3520 case REMOTE_GO: 3521 return "remote"; 3522 } 3523 3524 return "??"; 3525} 3526 3527 3528const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p, 3529 const u8 *addr, int next) 3530{ 3531 struct p2p_device *dev; 3532 3533 if (addr) 3534 dev = p2p_get_device(p2p, addr); 3535 else 3536 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 3537 3538 if (dev && next) { 3539 dev = dl_list_first(&dev->list, struct p2p_device, list); 3540 if (&dev->list == &p2p->devices) 3541 dev = NULL; 3542 } 3543 3544 if (dev == NULL) 3545 return NULL; 3546 3547 return &dev->info; 3548} 3549 3550 3551int p2p_get_peer_info_txt(const struct p2p_peer_info *info, 3552 char *buf, size_t buflen) 3553{ 3554 struct p2p_device *dev; 3555 int res; 3556 char *pos, *end; 3557 struct os_time now; 3558 3559 if (info == NULL) 3560 return -1; 3561 3562 dev = (struct p2p_device *) (((u8 *) info) - 3563 offsetof(struct p2p_device, info)); 3564 3565 pos = buf; 3566 end = buf + buflen; 3567 3568 os_get_time(&now); 3569 res = os_snprintf(pos, end - pos, 3570 "age=%d\n" 3571 "listen_freq=%d\n" 3572 "wps_method=%s\n" 3573 "interface_addr=" MACSTR "\n" 3574 "member_in_go_dev=" MACSTR "\n" 3575 "member_in_go_iface=" MACSTR "\n" 3576 "go_neg_req_sent=%d\n" 3577 "go_state=%s\n" 3578 "dialog_token=%u\n" 3579 "intended_addr=" MACSTR "\n" 3580 "country=%c%c\n" 3581 "oper_freq=%d\n" 3582 "req_config_methods=0x%x\n" 3583 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n" 3584 "status=%d\n" 3585 "wait_count=%u\n" 3586 "invitation_reqs=%u\n", 3587 (int) (now.sec - dev->last_seen.sec), 3588 dev->listen_freq, 3589 p2p_wps_method_text(dev->wps_method), 3590 MAC2STR(dev->interface_addr), 3591 MAC2STR(dev->member_in_go_dev), 3592 MAC2STR(dev->member_in_go_iface), 3593 dev->go_neg_req_sent, 3594 p2p_go_state_text(dev->go_state), 3595 dev->dialog_token, 3596 MAC2STR(dev->intended_addr), 3597 dev->country[0] ? dev->country[0] : '_', 3598 dev->country[1] ? dev->country[1] : '_', 3599 dev->oper_freq, 3600 dev->req_config_methods, 3601 dev->flags & P2P_DEV_PROBE_REQ_ONLY ? 3602 "[PROBE_REQ_ONLY]" : "", 3603 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "", 3604 dev->flags & P2P_DEV_NOT_YET_READY ? 3605 "[NOT_YET_READY]" : "", 3606 dev->flags & P2P_DEV_SD_INFO ? "[SD_INFO]" : "", 3607 dev->flags & P2P_DEV_SD_SCHEDULE ? "[SD_SCHEDULE]" : 3608 "", 3609 dev->flags & P2P_DEV_PD_PEER_DISPLAY ? 3610 "[PD_PEER_DISPLAY]" : "", 3611 dev->flags & P2P_DEV_PD_PEER_KEYPAD ? 3612 "[PD_PEER_KEYPAD]" : "", 3613 dev->flags & P2P_DEV_USER_REJECTED ? 3614 "[USER_REJECTED]" : "", 3615 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ? 3616 "[PEER_WAITING_RESPONSE]" : "", 3617 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ? 3618 "[PREFER_PERSISTENT_GROUP]" : "", 3619 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ? 3620 "[WAIT_GO_NEG_RESPONSE]" : "", 3621 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ? 3622 "[WAIT_GO_NEG_CONFIRM]" : "", 3623 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ? 3624 "[GROUP_CLIENT_ONLY]" : "", 3625 dev->flags & P2P_DEV_FORCE_FREQ ? 3626 "[FORCE_FREQ]" : "", 3627 dev->flags & P2P_DEV_PD_FOR_JOIN ? 3628 "[PD_FOR_JOIN]" : "", 3629 dev->status, 3630 dev->wait_count, 3631 dev->invitation_reqs); 3632 if (res < 0 || res >= end - pos) 3633 return pos - buf; 3634 pos += res; 3635 3636 if (dev->ext_listen_period) { 3637 res = os_snprintf(pos, end - pos, 3638 "ext_listen_period=%u\n" 3639 "ext_listen_interval=%u\n", 3640 dev->ext_listen_period, 3641 dev->ext_listen_interval); 3642 if (res < 0 || res >= end - pos) 3643 return pos - buf; 3644 pos += res; 3645 } 3646 3647 if (dev->oper_ssid_len) { 3648 res = os_snprintf(pos, end - pos, 3649 "oper_ssid=%s\n", 3650 wpa_ssid_txt(dev->oper_ssid, 3651 dev->oper_ssid_len)); 3652 if (res < 0 || res >= end - pos) 3653 return pos - buf; 3654 pos += res; 3655 } 3656 3657#ifdef CONFIG_WIFI_DISPLAY 3658 if (dev->info.wfd_subelems) { 3659 res = os_snprintf(pos, end - pos, "wfd_subelems="); 3660 if (res < 0 || res >= end - pos) 3661 return pos - buf; 3662 pos += res; 3663 3664 pos += wpa_snprintf_hex(pos, end - pos, 3665 wpabuf_head(dev->info.wfd_subelems), 3666 wpabuf_len(dev->info.wfd_subelems)); 3667 3668 res = os_snprintf(pos, end - pos, "\n"); 3669 if (res < 0 || res >= end - pos) 3670 return pos - buf; 3671 pos += res; 3672 } 3673#endif /* CONFIG_WIFI_DISPLAY */ 3674 3675 return pos - buf; 3676} 3677 3678 3679int p2p_peer_known(struct p2p_data *p2p, const u8 *addr) 3680{ 3681 return p2p_get_device(p2p, addr) != NULL; 3682} 3683 3684 3685void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled) 3686{ 3687 if (enabled) { 3688 p2p_dbg(p2p, "Client discoverability enabled"); 3689 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3690 } else { 3691 p2p_dbg(p2p, "Client discoverability disabled"); 3692 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3693 } 3694} 3695 3696 3697static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1, 3698 u32 duration2, u32 interval2) 3699{ 3700 struct wpabuf *req; 3701 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL; 3702 u8 *len; 3703 3704 req = wpabuf_alloc(100); 3705 if (req == NULL) 3706 return NULL; 3707 3708 if (duration1 || interval1) { 3709 os_memset(&desc1, 0, sizeof(desc1)); 3710 desc1.count_type = 1; 3711 desc1.duration = duration1; 3712 desc1.interval = interval1; 3713 ptr1 = &desc1; 3714 3715 if (duration2 || interval2) { 3716 os_memset(&desc2, 0, sizeof(desc2)); 3717 desc2.count_type = 2; 3718 desc2.duration = duration2; 3719 desc2.interval = interval2; 3720 ptr2 = &desc2; 3721 } 3722 } 3723 3724 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1); 3725 len = p2p_buf_add_ie_hdr(req); 3726 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2); 3727 p2p_buf_update_ie_hdr(req, len); 3728 3729 return req; 3730} 3731 3732 3733int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr, 3734 const u8 *own_interface_addr, unsigned int freq, 3735 u32 duration1, u32 interval1, u32 duration2, 3736 u32 interval2) 3737{ 3738 struct wpabuf *req; 3739 3740 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR 3741 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u " 3742 "dur2=%u int2=%u", 3743 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr), 3744 freq, duration1, interval1, duration2, interval2); 3745 3746 req = p2p_build_presence_req(duration1, interval1, duration2, 3747 interval2); 3748 if (req == NULL) 3749 return -1; 3750 3751 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3752 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr, 3753 go_interface_addr, 3754 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 3755 p2p_dbg(p2p, "Failed to send Action frame"); 3756 } 3757 wpabuf_free(req); 3758 3759 return 0; 3760} 3761 3762 3763static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa, 3764 size_t noa_len, u8 dialog_token) 3765{ 3766 struct wpabuf *resp; 3767 u8 *len; 3768 3769 resp = wpabuf_alloc(100 + noa_len); 3770 if (resp == NULL) 3771 return NULL; 3772 3773 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token); 3774 len = p2p_buf_add_ie_hdr(resp); 3775 p2p_buf_add_status(resp, status); 3776 if (noa) { 3777 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE); 3778 wpabuf_put_le16(resp, noa_len); 3779 wpabuf_put_data(resp, noa, noa_len); 3780 } else 3781 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL); 3782 p2p_buf_update_ie_hdr(resp, len); 3783 3784 return resp; 3785} 3786 3787 3788static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 3789 const u8 *sa, const u8 *data, size_t len, 3790 int rx_freq) 3791{ 3792 struct p2p_message msg; 3793 u8 status; 3794 struct wpabuf *resp; 3795 size_t g; 3796 struct p2p_group *group = NULL; 3797 int parsed = 0; 3798 u8 noa[50]; 3799 int noa_len; 3800 3801 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request"); 3802 3803 for (g = 0; g < p2p->num_groups; g++) { 3804 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]), 3805 ETH_ALEN) == 0) { 3806 group = p2p->groups[g]; 3807 break; 3808 } 3809 } 3810 if (group == NULL) { 3811 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group " 3812 MACSTR, MAC2STR(da)); 3813 return; 3814 } 3815 3816 if (p2p_parse(data, len, &msg) < 0) { 3817 p2p_dbg(p2p, "Failed to parse P2P Presence Request"); 3818 status = P2P_SC_FAIL_INVALID_PARAMS; 3819 goto fail; 3820 } 3821 parsed = 1; 3822 3823 if (msg.noa == NULL) { 3824 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request"); 3825 status = P2P_SC_FAIL_INVALID_PARAMS; 3826 goto fail; 3827 } 3828 3829 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len); 3830 3831fail: 3832 if (p2p->cfg->get_noa) 3833 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa, 3834 sizeof(noa)); 3835 else 3836 noa_len = -1; 3837 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL, 3838 noa_len > 0 ? noa_len : 0, 3839 msg.dialog_token); 3840 if (parsed) 3841 p2p_parse_free(&msg); 3842 if (resp == NULL) 3843 return; 3844 3845 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3846 if (p2p_send_action(p2p, rx_freq, sa, da, da, 3847 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 3848 p2p_dbg(p2p, "Failed to send Action frame"); 3849 } 3850 wpabuf_free(resp); 3851} 3852 3853 3854static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 3855 const u8 *sa, const u8 *data, size_t len) 3856{ 3857 struct p2p_message msg; 3858 3859 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response"); 3860 3861 if (p2p_parse(data, len, &msg) < 0) { 3862 p2p_dbg(p2p, "Failed to parse P2P Presence Response"); 3863 return; 3864 } 3865 3866 if (msg.status == NULL || msg.noa == NULL) { 3867 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response"); 3868 p2p_parse_free(&msg); 3869 return; 3870 } 3871 3872 if (*msg.status) { 3873 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u", 3874 *msg.status); 3875 p2p_parse_free(&msg); 3876 return; 3877 } 3878 3879 p2p_dbg(p2p, "P2P Presence Request was accepted"); 3880 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA", 3881 msg.noa, msg.noa_len); 3882 /* TODO: process NoA */ 3883 p2p_parse_free(&msg); 3884} 3885 3886 3887static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx) 3888{ 3889 struct p2p_data *p2p = eloop_ctx; 3890 3891 if (p2p->ext_listen_interval) { 3892 /* Schedule next extended listen timeout */ 3893 eloop_register_timeout(p2p->ext_listen_interval_sec, 3894 p2p->ext_listen_interval_usec, 3895 p2p_ext_listen_timeout, p2p, NULL); 3896 } 3897 3898 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) { 3899 /* 3900 * This should not really happen, but it looks like the Listen 3901 * command may fail is something else (e.g., a scan) was 3902 * running at an inconvenient time. As a workaround, allow new 3903 * Extended Listen operation to be started. 3904 */ 3905 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again"); 3906 p2p->ext_listen_only = 0; 3907 p2p_set_state(p2p, P2P_IDLE); 3908 } 3909 3910 if (p2p->state != P2P_IDLE) { 3911 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state)); 3912 return; 3913 } 3914 3915 p2p_dbg(p2p, "Extended Listen timeout"); 3916 p2p->ext_listen_only = 1; 3917 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) { 3918 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing"); 3919 p2p->ext_listen_only = 0; 3920 } 3921} 3922 3923 3924int p2p_ext_listen(struct p2p_data *p2p, unsigned int period, 3925 unsigned int interval) 3926{ 3927 if (period > 65535 || interval > 65535 || period > interval || 3928 (period == 0 && interval > 0) || (period > 0 && interval == 0)) { 3929 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u", 3930 period, interval); 3931 return -1; 3932 } 3933 3934 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 3935 3936 if (interval == 0) { 3937 p2p_dbg(p2p, "Disabling Extended Listen Timing"); 3938 p2p->ext_listen_period = 0; 3939 p2p->ext_listen_interval = 0; 3940 return 0; 3941 } 3942 3943 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec", 3944 period, interval); 3945 p2p->ext_listen_period = period; 3946 p2p->ext_listen_interval = interval; 3947 p2p->ext_listen_interval_sec = interval / 1000; 3948 p2p->ext_listen_interval_usec = (interval % 1000) * 1000; 3949 3950 eloop_register_timeout(p2p->ext_listen_interval_sec, 3951 p2p->ext_listen_interval_usec, 3952 p2p_ext_listen_timeout, p2p, NULL); 3953 3954 return 0; 3955} 3956 3957 3958void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 3959 const u8 *ie, size_t ie_len) 3960{ 3961 struct p2p_message msg; 3962 3963 if (bssid == NULL || ie == NULL) 3964 return; 3965 3966 os_memset(&msg, 0, sizeof(msg)); 3967 if (p2p_parse_ies(ie, ie_len, &msg)) 3968 return; 3969 if (msg.minor_reason_code == NULL) 3970 return; 3971 3972 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR 3973 " reason_code=%u minor_reason_code=%u", 3974 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 3975 3976 p2p_parse_free(&msg); 3977} 3978 3979 3980void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 3981 const u8 *ie, size_t ie_len) 3982{ 3983 struct p2p_message msg; 3984 3985 if (bssid == NULL || ie == NULL) 3986 return; 3987 3988 os_memset(&msg, 0, sizeof(msg)); 3989 if (p2p_parse_ies(ie, ie_len, &msg)) 3990 return; 3991 if (msg.minor_reason_code == NULL) 3992 return; 3993 3994 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR 3995 " reason_code=%u minor_reason_code=%u", 3996 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 3997 3998 p2p_parse_free(&msg); 3999} 4000 4001 4002void p2p_set_managed_oper(struct p2p_data *p2p, int enabled) 4003{ 4004 if (enabled) { 4005 p2p_dbg(p2p, "Managed P2P Device operations enabled"); 4006 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED; 4007 } else { 4008 p2p_dbg(p2p, "Managed P2P Device operations disabled"); 4009 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED; 4010 } 4011} 4012 4013 4014int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel) 4015{ 4016 if (p2p_channel_to_freq(reg_class, channel) < 0) 4017 return -1; 4018 4019 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u", 4020 reg_class, channel); 4021 p2p->cfg->reg_class = reg_class; 4022 p2p->cfg->channel = channel; 4023 4024 return 0; 4025} 4026 4027 4028int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len) 4029{ 4030 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len)); 4031 if (postfix == NULL) { 4032 p2p->cfg->ssid_postfix_len = 0; 4033 return 0; 4034 } 4035 if (len > sizeof(p2p->cfg->ssid_postfix)) 4036 return -1; 4037 os_memcpy(p2p->cfg->ssid_postfix, postfix, len); 4038 p2p->cfg->ssid_postfix_len = len; 4039 return 0; 4040} 4041 4042 4043int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel, 4044 int cfg_op_channel) 4045{ 4046 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0) 4047 return -1; 4048 4049 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u", 4050 op_reg_class, op_channel); 4051 p2p->cfg->op_reg_class = op_reg_class; 4052 p2p->cfg->op_channel = op_channel; 4053 p2p->cfg->cfg_op_channel = cfg_op_channel; 4054 return 0; 4055} 4056 4057 4058int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan, 4059 const struct p2p_channel *pref_chan) 4060{ 4061 struct p2p_channel *n; 4062 4063 if (pref_chan) { 4064 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel)); 4065 if (n == NULL) 4066 return -1; 4067 os_memcpy(n, pref_chan, 4068 num_pref_chan * sizeof(struct p2p_channel)); 4069 } else 4070 n = NULL; 4071 4072 os_free(p2p->cfg->pref_chan); 4073 p2p->cfg->pref_chan = n; 4074 p2p->cfg->num_pref_chan = num_pref_chan; 4075 4076 return 0; 4077} 4078 4079 4080int p2p_set_no_go_freq(struct p2p_data *p2p, 4081 const struct wpa_freq_range_list *list) 4082{ 4083 struct wpa_freq_range *tmp; 4084 4085 if (list == NULL || list->num == 0) { 4086 os_free(p2p->no_go_freq.range); 4087 p2p->no_go_freq.range = NULL; 4088 p2p->no_go_freq.num = 0; 4089 return 0; 4090 } 4091 4092 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range)); 4093 if (tmp == NULL) 4094 return -1; 4095 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range)); 4096 os_free(p2p->no_go_freq.range); 4097 p2p->no_go_freq.range = tmp; 4098 p2p->no_go_freq.num = list->num; 4099 p2p_dbg(p2p, "Updated no GO chan list"); 4100 4101 return 0; 4102} 4103 4104 4105int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr, 4106 u8 *iface_addr) 4107{ 4108 struct p2p_device *dev = p2p_get_device(p2p, dev_addr); 4109 if (dev == NULL || is_zero_ether_addr(dev->interface_addr)) 4110 return -1; 4111 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN); 4112 return 0; 4113} 4114 4115 4116int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr, 4117 u8 *dev_addr) 4118{ 4119 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4120 if (dev == NULL) 4121 return -1; 4122 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN); 4123 return 0; 4124} 4125 4126 4127void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr) 4128{ 4129 os_memcpy(p2p->peer_filter, addr, ETH_ALEN); 4130 if (is_zero_ether_addr(p2p->peer_filter)) 4131 p2p_dbg(p2p, "Disable peer filter"); 4132 else 4133 p2p_dbg(p2p, "Enable peer filter for " MACSTR, 4134 MAC2STR(p2p->peer_filter)); 4135} 4136 4137 4138void p2p_set_cross_connect(struct p2p_data *p2p, int enabled) 4139{ 4140 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled"); 4141 if (p2p->cross_connect == enabled) 4142 return; 4143 p2p->cross_connect = enabled; 4144 /* TODO: may need to tear down any action group where we are GO(?) */ 4145} 4146 4147 4148int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr) 4149{ 4150 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4151 if (dev == NULL) 4152 return -1; 4153 if (dev->oper_freq <= 0) 4154 return -1; 4155 return dev->oper_freq; 4156} 4157 4158 4159void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled) 4160{ 4161 p2p_dbg(p2p, "Intra BSS distribution %s", 4162 enabled ? "enabled" : "disabled"); 4163 p2p->cfg->p2p_intra_bss = enabled; 4164} 4165 4166 4167void p2p_update_channel_list(struct p2p_data *p2p, 4168 const struct p2p_channels *chan, 4169 const struct p2p_channels *cli_chan) 4170{ 4171 p2p_dbg(p2p, "Update channel list"); 4172 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels)); 4173 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 4174 os_memcpy(&p2p->cfg->cli_channels, cli_chan, 4175 sizeof(struct p2p_channels)); 4176 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 4177} 4178 4179 4180int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 4181 const u8 *src, const u8 *bssid, const u8 *buf, 4182 size_t len, unsigned int wait_time) 4183{ 4184 if (p2p->p2p_scan_running) { 4185 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes"); 4186 if (p2p->after_scan_tx) { 4187 p2p_dbg(p2p, "Dropped previous pending Action frame TX"); 4188 os_free(p2p->after_scan_tx); 4189 } 4190 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) + 4191 len); 4192 if (p2p->after_scan_tx == NULL) 4193 return -1; 4194 p2p->after_scan_tx->freq = freq; 4195 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN); 4196 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN); 4197 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN); 4198 p2p->after_scan_tx->len = len; 4199 p2p->after_scan_tx->wait_time = wait_time; 4200 os_memcpy(p2p->after_scan_tx + 1, buf, len); 4201 return 0; 4202 } 4203 4204 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid, 4205 buf, len, wait_time); 4206} 4207 4208 4209void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5, 4210 int freq_overall) 4211{ 4212 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d", 4213 freq_24, freq_5, freq_overall); 4214 p2p->best_freq_24 = freq_24; 4215 p2p->best_freq_5 = freq_5; 4216 p2p->best_freq_overall = freq_overall; 4217} 4218 4219 4220void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq) 4221{ 4222 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq); 4223 p2p->own_freq_preference = freq; 4224} 4225 4226 4227const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p) 4228{ 4229 if (p2p == NULL || p2p->go_neg_peer == NULL) 4230 return NULL; 4231 return p2p->go_neg_peer->info.p2p_device_addr; 4232} 4233 4234 4235const struct p2p_peer_info * 4236p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next) 4237{ 4238 struct p2p_device *dev; 4239 4240 if (addr) { 4241 dev = p2p_get_device(p2p, addr); 4242 if (!dev) 4243 return NULL; 4244 4245 if (!next) { 4246 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 4247 return NULL; 4248 4249 return &dev->info; 4250 } else { 4251 do { 4252 dev = dl_list_first(&dev->list, 4253 struct p2p_device, 4254 list); 4255 if (&dev->list == &p2p->devices) 4256 return NULL; 4257 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY); 4258 } 4259 } else { 4260 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4261 if (!dev) 4262 return NULL; 4263 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 4264 dev = dl_list_first(&dev->list, 4265 struct p2p_device, 4266 list); 4267 if (&dev->list == &p2p->devices) 4268 return NULL; 4269 } 4270 } 4271 4272 return &dev->info; 4273} 4274 4275#ifdef ANDROID_P2P 4276int p2p_search_in_progress(struct p2p_data *p2p) 4277{ 4278 if (p2p == NULL) 4279 return 0; 4280 4281 return p2p->state == P2P_SEARCH; 4282} 4283#endif 4284 4285int p2p_in_progress(struct p2p_data *p2p) 4286{ 4287 if (p2p == NULL) 4288 return 0; 4289 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SEARCH_WHEN_READY || 4290 p2p->state == P2P_CONTINUE_SEARCH_WHEN_READY) 4291 return 2; 4292 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING; 4293} 4294 4295 4296void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout, 4297 u8 client_timeout) 4298{ 4299 if (p2p) { 4300 p2p->go_timeout = go_timeout; 4301 p2p->client_timeout = client_timeout; 4302 } 4303} 4304 4305 4306void p2p_increase_search_delay(struct p2p_data *p2p, unsigned int delay) 4307{ 4308 if (p2p && p2p->search_delay < delay) 4309 p2p->search_delay = delay; 4310} 4311 4312 4313#ifdef CONFIG_WIFI_DISPLAY 4314 4315static void p2p_update_wfd_ie_groups(struct p2p_data *p2p) 4316{ 4317 size_t g; 4318 struct p2p_group *group; 4319 4320 for (g = 0; g < p2p->num_groups; g++) { 4321 group = p2p->groups[g]; 4322 p2p_group_update_ies(group); 4323 } 4324} 4325 4326 4327int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie) 4328{ 4329 wpabuf_free(p2p->wfd_ie_beacon); 4330 p2p->wfd_ie_beacon = ie; 4331 p2p_update_wfd_ie_groups(p2p); 4332 return 0; 4333} 4334 4335 4336int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie) 4337{ 4338 wpabuf_free(p2p->wfd_ie_probe_req); 4339 p2p->wfd_ie_probe_req = ie; 4340 return 0; 4341} 4342 4343 4344int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie) 4345{ 4346 wpabuf_free(p2p->wfd_ie_probe_resp); 4347 p2p->wfd_ie_probe_resp = ie; 4348 p2p_update_wfd_ie_groups(p2p); 4349 return 0; 4350} 4351 4352 4353int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie) 4354{ 4355 wpabuf_free(p2p->wfd_ie_assoc_req); 4356 p2p->wfd_ie_assoc_req = ie; 4357 return 0; 4358} 4359 4360 4361int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie) 4362{ 4363 wpabuf_free(p2p->wfd_ie_invitation); 4364 p2p->wfd_ie_invitation = ie; 4365 return 0; 4366} 4367 4368 4369int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie) 4370{ 4371 wpabuf_free(p2p->wfd_ie_prov_disc_req); 4372 p2p->wfd_ie_prov_disc_req = ie; 4373 return 0; 4374} 4375 4376 4377int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie) 4378{ 4379 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 4380 p2p->wfd_ie_prov_disc_resp = ie; 4381 return 0; 4382} 4383 4384 4385int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie) 4386{ 4387 wpabuf_free(p2p->wfd_ie_go_neg); 4388 p2p->wfd_ie_go_neg = ie; 4389 return 0; 4390} 4391 4392 4393int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem) 4394{ 4395 wpabuf_free(p2p->wfd_dev_info); 4396 if (elem) { 4397 p2p->wfd_dev_info = wpabuf_dup(elem); 4398 if (p2p->wfd_dev_info == NULL) 4399 return -1; 4400 } else 4401 p2p->wfd_dev_info = NULL; 4402 4403 return 0; 4404} 4405 4406 4407int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem) 4408{ 4409 wpabuf_free(p2p->wfd_assoc_bssid); 4410 if (elem) { 4411 p2p->wfd_assoc_bssid = wpabuf_dup(elem); 4412 if (p2p->wfd_assoc_bssid == NULL) 4413 return -1; 4414 } else 4415 p2p->wfd_assoc_bssid = NULL; 4416 4417 return 0; 4418} 4419 4420 4421int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p, 4422 const struct wpabuf *elem) 4423{ 4424 wpabuf_free(p2p->wfd_coupled_sink_info); 4425 if (elem) { 4426 p2p->wfd_coupled_sink_info = wpabuf_dup(elem); 4427 if (p2p->wfd_coupled_sink_info == NULL) 4428 return -1; 4429 } else 4430 p2p->wfd_coupled_sink_info = NULL; 4431 4432 return 0; 4433} 4434 4435#endif /* CONFIG_WIFI_DISPLAY */ 4436 4437 4438int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int, 4439 int max_disc_tu) 4440{ 4441 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0) 4442 return -1; 4443 4444 p2p->min_disc_int = min_disc_int; 4445 p2p->max_disc_int = max_disc_int; 4446 p2p->max_disc_tu = max_disc_tu; 4447 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d", 4448 min_disc_int, max_disc_int, max_disc_tu); 4449 4450 return 0; 4451} 4452 4453 4454void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...) 4455{ 4456 va_list ap; 4457 char buf[500]; 4458 4459 if (!p2p->cfg->debug_print) 4460 return; 4461 4462 va_start(ap, fmt); 4463 vsnprintf(buf, sizeof(buf), fmt, ap); 4464 buf[sizeof(buf) - 1] = '\0'; 4465 va_end(ap); 4466 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf); 4467} 4468 4469 4470void p2p_info(struct p2p_data *p2p, const char *fmt, ...) 4471{ 4472 va_list ap; 4473 char buf[500]; 4474 4475 if (!p2p->cfg->debug_print) 4476 return; 4477 4478 va_start(ap, fmt); 4479 vsnprintf(buf, sizeof(buf), fmt, ap); 4480 buf[sizeof(buf) - 1] = '\0'; 4481 va_end(ap); 4482 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf); 4483} 4484 4485 4486void p2p_err(struct p2p_data *p2p, const char *fmt, ...) 4487{ 4488 va_list ap; 4489 char buf[500]; 4490 4491 if (!p2p->cfg->debug_print) 4492 return; 4493 4494 va_start(ap, fmt); 4495 vsnprintf(buf, sizeof(buf), fmt, ap); 4496 buf[sizeof(buf) - 1] = '\0'; 4497 va_end(ap); 4498 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf); 4499} 4500