p2p.c revision a38abf9af7bec7e89dbfb39ac7bb77223fe47c72
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#ifndef P2P_PEER_EXPIRATION_AGE 45#define P2P_PEER_EXPIRATION_AGE 60 46#endif /* P2P_PEER_EXPIRATION_AGE */ 47 48#define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2) 49 50static void p2p_expire_peers(struct p2p_data *p2p) 51{ 52 struct p2p_device *dev, *n; 53 struct os_reltime now; 54 size_t i; 55 56 os_get_reltime(&now); 57 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) { 58 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec) 59 continue; 60 61 if (dev == p2p->go_neg_peer) { 62 /* 63 * GO Negotiation is in progress with the peer, so 64 * don't expire the peer entry until GO Negotiation 65 * fails or times out. 66 */ 67 continue; 68 } 69 70 if (p2p->cfg->go_connected && 71 p2p->cfg->go_connected(p2p->cfg->cb_ctx, 72 dev->info.p2p_device_addr)) { 73 /* 74 * We are connected as a client to a group in which the 75 * peer is the GO, so do not expire the peer entry. 76 */ 77 os_get_reltime(&dev->last_seen); 78 continue; 79 } 80 81 for (i = 0; i < p2p->num_groups; i++) { 82 if (p2p_group_is_client_connected( 83 p2p->groups[i], dev->info.p2p_device_addr)) 84 break; 85 } 86 if (i < p2p->num_groups) { 87 /* 88 * The peer is connected as a client in a group where 89 * we are the GO, so do not expire the peer entry. 90 */ 91 os_get_reltime(&dev->last_seen); 92 continue; 93 } 94 95 p2p_dbg(p2p, "Expiring old peer entry " MACSTR, 96 MAC2STR(dev->info.p2p_device_addr)); 97 dl_list_del(&dev->list); 98 p2p_device_free(p2p, dev); 99 } 100} 101 102 103static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx) 104{ 105 struct p2p_data *p2p = eloop_ctx; 106 p2p_expire_peers(p2p); 107 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 108 p2p_expiration_timeout, p2p, NULL); 109} 110 111 112static const char * p2p_state_txt(int state) 113{ 114 switch (state) { 115 case P2P_IDLE: 116 return "IDLE"; 117 case P2P_SEARCH: 118 return "SEARCH"; 119 case P2P_CONNECT: 120 return "CONNECT"; 121 case P2P_CONNECT_LISTEN: 122 return "CONNECT_LISTEN"; 123 case P2P_GO_NEG: 124 return "GO_NEG"; 125 case P2P_LISTEN_ONLY: 126 return "LISTEN_ONLY"; 127 case P2P_WAIT_PEER_CONNECT: 128 return "WAIT_PEER_CONNECT"; 129 case P2P_WAIT_PEER_IDLE: 130 return "WAIT_PEER_IDLE"; 131 case P2P_SD_DURING_FIND: 132 return "SD_DURING_FIND"; 133 case P2P_PROVISIONING: 134 return "PROVISIONING"; 135 case P2P_PD_DURING_FIND: 136 return "PD_DURING_FIND"; 137 case P2P_INVITE: 138 return "INVITE"; 139 case P2P_INVITE_LISTEN: 140 return "INVITE_LISTEN"; 141 default: 142 return "?"; 143 } 144} 145 146 147const char * p2p_get_state_txt(struct p2p_data *p2p) 148{ 149 return p2p_state_txt(p2p->state); 150} 151 152 153u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr) 154{ 155 struct p2p_device *dev = NULL; 156 157 if (!addr || !p2p) 158 return 0; 159 160 dev = p2p_get_device(p2p, addr); 161 if (dev) 162 return dev->wps_prov_info; 163 else 164 return 0; 165} 166 167 168void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr) 169{ 170 struct p2p_device *dev = NULL; 171 172 if (!addr || !p2p) 173 return; 174 175 dev = p2p_get_device(p2p, addr); 176 if (dev) 177 dev->wps_prov_info = 0; 178} 179 180 181void p2p_set_state(struct p2p_data *p2p, int new_state) 182{ 183 p2p_dbg(p2p, "State %s -> %s", 184 p2p_state_txt(p2p->state), p2p_state_txt(new_state)); 185 p2p->state = new_state; 186} 187 188 189void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec) 190{ 191 p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec", 192 p2p_state_txt(p2p->state), sec, usec); 193 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 194 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL); 195} 196 197 198void p2p_clear_timeout(struct p2p_data *p2p) 199{ 200 p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state)); 201 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 202} 203 204 205void p2p_go_neg_failed(struct p2p_data *p2p, struct p2p_device *peer, 206 int status) 207{ 208 struct p2p_go_neg_results res; 209 p2p_clear_timeout(p2p); 210 p2p_set_state(p2p, P2P_IDLE); 211 if (p2p->go_neg_peer) { 212 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 213 p2p->go_neg_peer->wps_method = WPS_NOT_READY; 214 p2p->go_neg_peer->oob_pw_id = 0; 215 } 216 p2p->go_neg_peer = NULL; 217 218 os_memset(&res, 0, sizeof(res)); 219 res.status = status; 220 if (peer) { 221 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, 222 ETH_ALEN); 223 os_memcpy(res.peer_interface_addr, peer->intended_addr, 224 ETH_ALEN); 225 } 226 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 227} 228 229 230static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc) 231{ 232 unsigned int r, tu; 233 int freq; 234 struct wpabuf *ies; 235 236 p2p_dbg(p2p, "Starting short listen state (state=%s)", 237 p2p_state_txt(p2p->state)); 238 239 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 240 if (freq < 0) { 241 p2p_dbg(p2p, "Unknown regulatory class/channel"); 242 return; 243 } 244 245 os_get_random((u8 *) &r, sizeof(r)); 246 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) + 247 p2p->min_disc_int) * 100; 248 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu) 249 tu = p2p->max_disc_tu; 250 if (!dev_disc && tu < 100) 251 tu = 100; /* Need to wait in non-device discovery use cases */ 252 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen) 253 tu = p2p->cfg->max_listen * 1000 / 1024; 254 255 if (tu == 0) { 256 p2p_dbg(p2p, "Skip listen state since duration was 0 TU"); 257 p2p_set_timeout(p2p, 0, 0); 258 return; 259 } 260 261 p2p->pending_listen_freq = freq; 262 p2p->pending_listen_sec = 0; 263 p2p->pending_listen_usec = 1024 * tu; 264 265 ies = p2p_build_probe_resp_ies(p2p); 266 if (ies == NULL) 267 return; 268 269 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000, 270 ies) < 0) { 271 p2p_dbg(p2p, "Failed to start listen mode"); 272 p2p->pending_listen_freq = 0; 273 } 274 wpabuf_free(ies); 275} 276 277 278int p2p_listen(struct p2p_data *p2p, unsigned int timeout) 279{ 280 int freq; 281 struct wpabuf *ies; 282 283 p2p_dbg(p2p, "Going to listen(only) state"); 284 285 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 286 if (freq < 0) { 287 p2p_dbg(p2p, "Unknown regulatory class/channel"); 288 return -1; 289 } 290 291 p2p->pending_listen_freq = freq; 292 p2p->pending_listen_sec = timeout / 1000; 293 p2p->pending_listen_usec = (timeout % 1000) * 1000; 294 295 if (p2p->p2p_scan_running) { 296 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) { 297 p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen"); 298 return 0; 299 } 300 p2p_dbg(p2p, "p2p_scan running - delay start of listen state"); 301 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN; 302 return 0; 303 } 304 305 ies = p2p_build_probe_resp_ies(p2p); 306 if (ies == NULL) 307 return -1; 308 309 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) { 310 p2p_dbg(p2p, "Failed to start listen mode"); 311 p2p->pending_listen_freq = 0; 312 wpabuf_free(ies); 313 return -1; 314 } 315 wpabuf_free(ies); 316 317 p2p_set_state(p2p, P2P_LISTEN_ONLY); 318 319 return 0; 320} 321 322 323static void p2p_device_clear_reported(struct p2p_data *p2p) 324{ 325 struct p2p_device *dev; 326 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) 327 dev->flags &= ~P2P_DEV_REPORTED; 328} 329 330 331/** 332 * p2p_get_device - Fetch a peer entry 333 * @p2p: P2P module context from p2p_init() 334 * @addr: P2P Device Address of the peer 335 * Returns: Pointer to the device entry or %NULL if not found 336 */ 337struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr) 338{ 339 struct p2p_device *dev; 340 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 341 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0) 342 return dev; 343 } 344 return NULL; 345} 346 347 348/** 349 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address 350 * @p2p: P2P module context from p2p_init() 351 * @addr: P2P Interface Address of the peer 352 * Returns: Pointer to the device entry or %NULL if not found 353 */ 354struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p, 355 const u8 *addr) 356{ 357 struct p2p_device *dev; 358 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 359 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0) 360 return dev; 361 } 362 return NULL; 363} 364 365 366/** 367 * p2p_create_device - Create 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 on failure 371 * 372 * If there is already an entry for the peer, it will be returned instead of 373 * creating a new one. 374 */ 375static struct p2p_device * p2p_create_device(struct p2p_data *p2p, 376 const u8 *addr) 377{ 378 struct p2p_device *dev, *oldest = NULL; 379 size_t count = 0; 380 381 dev = p2p_get_device(p2p, addr); 382 if (dev) 383 return dev; 384 385 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 386 count++; 387 if (oldest == NULL || 388 os_reltime_before(&dev->last_seen, &oldest->last_seen)) 389 oldest = dev; 390 } 391 if (count + 1 > p2p->cfg->max_peers && oldest) { 392 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer"); 393 dl_list_del(&oldest->list); 394 p2p_device_free(p2p, oldest); 395 } 396 397 dev = os_zalloc(sizeof(*dev)); 398 if (dev == NULL) 399 return NULL; 400 dl_list_add(&p2p->devices, &dev->list); 401 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN); 402 403 return dev; 404} 405 406 407static void p2p_copy_client_info(struct p2p_device *dev, 408 struct p2p_client_info *cli) 409{ 410 os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len); 411 dev->info.device_name[cli->dev_name_len] = '\0'; 412 dev->info.dev_capab = cli->dev_capab; 413 dev->info.config_methods = cli->config_methods; 414 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8); 415 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types; 416 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types, 417 dev->info.wps_sec_dev_type_list_len); 418} 419 420 421static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr, 422 const u8 *go_interface_addr, int freq, 423 const u8 *gi, size_t gi_len) 424{ 425 struct p2p_group_info info; 426 size_t c; 427 struct p2p_device *dev; 428 429 if (gi == NULL) 430 return 0; 431 432 if (p2p_group_info_parse(gi, gi_len, &info) < 0) 433 return -1; 434 435 /* 436 * Clear old data for this group; if the devices are still in the 437 * group, the information will be restored in the loop following this. 438 */ 439 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 440 if (os_memcmp(dev->member_in_go_iface, go_interface_addr, 441 ETH_ALEN) == 0) { 442 os_memset(dev->member_in_go_iface, 0, ETH_ALEN); 443 os_memset(dev->member_in_go_dev, 0, ETH_ALEN); 444 } 445 } 446 447 for (c = 0; c < info.num_clients; c++) { 448 struct p2p_client_info *cli = &info.client[c]; 449 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr, 450 ETH_ALEN) == 0) 451 continue; /* ignore our own entry */ 452 dev = p2p_get_device(p2p, cli->p2p_device_addr); 453 if (dev) { 454 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY | 455 P2P_DEV_PROBE_REQ_ONLY)) { 456 /* 457 * Update information since we have not 458 * received this directly from the client. 459 */ 460 p2p_copy_client_info(dev, cli); 461 } else { 462 /* 463 * Need to update P2P Client Discoverability 464 * flag since it is valid only in P2P Group 465 * Info attribute. 466 */ 467 dev->info.dev_capab &= 468 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 469 dev->info.dev_capab |= 470 cli->dev_capab & 471 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 472 } 473 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 474 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 475 } 476 } else { 477 dev = p2p_create_device(p2p, cli->p2p_device_addr); 478 if (dev == NULL) 479 continue; 480 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 481 p2p_copy_client_info(dev, cli); 482 dev->oper_freq = freq; 483 p2p->cfg->dev_found(p2p->cfg->cb_ctx, 484 dev->info.p2p_device_addr, 485 &dev->info, 1); 486 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 487 } 488 489 os_memcpy(dev->interface_addr, cli->p2p_interface_addr, 490 ETH_ALEN); 491 os_get_reltime(&dev->last_seen); 492 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN); 493 os_memcpy(dev->member_in_go_iface, go_interface_addr, 494 ETH_ALEN); 495 } 496 497 return 0; 498} 499 500 501static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev, 502 int probe_req, const struct p2p_message *msg) 503{ 504 os_memcpy(dev->info.device_name, msg->device_name, 505 sizeof(dev->info.device_name)); 506 507 if (msg->manufacturer && 508 msg->manufacturer_len < sizeof(dev->info.manufacturer)) { 509 os_memset(dev->info.manufacturer, 0, 510 sizeof(dev->info.manufacturer)); 511 os_memcpy(dev->info.manufacturer, msg->manufacturer, 512 msg->manufacturer_len); 513 } 514 515 if (msg->model_name && 516 msg->model_name_len < sizeof(dev->info.model_name)) { 517 os_memset(dev->info.model_name, 0, 518 sizeof(dev->info.model_name)); 519 os_memcpy(dev->info.model_name, msg->model_name, 520 msg->model_name_len); 521 } 522 523 if (msg->model_number && 524 msg->model_number_len < sizeof(dev->info.model_number)) { 525 os_memset(dev->info.model_number, 0, 526 sizeof(dev->info.model_number)); 527 os_memcpy(dev->info.model_number, msg->model_number, 528 msg->model_number_len); 529 } 530 531 if (msg->serial_number && 532 msg->serial_number_len < sizeof(dev->info.serial_number)) { 533 os_memset(dev->info.serial_number, 0, 534 sizeof(dev->info.serial_number)); 535 os_memcpy(dev->info.serial_number, msg->serial_number, 536 msg->serial_number_len); 537 } 538 539 if (msg->pri_dev_type) 540 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type, 541 sizeof(dev->info.pri_dev_type)); 542 else if (msg->wps_pri_dev_type) 543 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type, 544 sizeof(dev->info.pri_dev_type)); 545 546 if (msg->wps_sec_dev_type_list) { 547 os_memcpy(dev->info.wps_sec_dev_type_list, 548 msg->wps_sec_dev_type_list, 549 msg->wps_sec_dev_type_list_len); 550 dev->info.wps_sec_dev_type_list_len = 551 msg->wps_sec_dev_type_list_len; 552 } 553 554 if (msg->capability) { 555 /* 556 * P2P Client Discoverability bit is reserved in all frames 557 * that use this function, so do not change its value here. 558 */ 559 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 560 dev->info.dev_capab |= msg->capability[0] & 561 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 562 dev->info.group_capab = msg->capability[1]; 563 } 564 565 if (msg->ext_listen_timing) { 566 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing); 567 dev->ext_listen_interval = 568 WPA_GET_LE16(msg->ext_listen_timing + 2); 569 } 570 571 if (!probe_req) { 572 u16 new_config_methods; 573 new_config_methods = msg->config_methods ? 574 msg->config_methods : msg->wps_config_methods; 575 if (new_config_methods && 576 dev->info.config_methods != new_config_methods) { 577 p2p_dbg(p2p, "Update peer " MACSTR 578 " config_methods 0x%x -> 0x%x", 579 MAC2STR(dev->info.p2p_device_addr), 580 dev->info.config_methods, 581 new_config_methods); 582 dev->info.config_methods = new_config_methods; 583 } 584 } 585} 586 587 588/** 589 * p2p_add_device - Add peer entries based on scan results or P2P frames 590 * @p2p: P2P module context from p2p_init() 591 * @addr: Source address of Beacon or Probe Response frame (may be either 592 * P2P Device Address or P2P Interface Address) 593 * @level: Signal level (signal strength of the received frame from the peer) 594 * @freq: Frequency on which the Beacon or Probe Response frame was received 595 * @rx_time: Time when the result was received 596 * @ies: IEs from the Beacon or Probe Response frame 597 * @ies_len: Length of ies buffer in octets 598 * @scan_res: Whether this was based on scan results 599 * Returns: 0 on success, -1 on failure 600 * 601 * If the scan result is for a GO, the clients in the group will also be added 602 * to the peer table. This function can also be used with some other frames 603 * like Provision Discovery Request that contains P2P Capability and P2P Device 604 * Info attributes. 605 */ 606int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq, 607 struct os_reltime *rx_time, int level, const u8 *ies, 608 size_t ies_len, int scan_res) 609{ 610 struct p2p_device *dev; 611 struct p2p_message msg; 612 const u8 *p2p_dev_addr; 613 int i; 614 struct os_reltime time_now; 615 616 os_memset(&msg, 0, sizeof(msg)); 617 if (p2p_parse_ies(ies, ies_len, &msg)) { 618 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry"); 619 p2p_parse_free(&msg); 620 return -1; 621 } 622 623 if (msg.p2p_device_addr) 624 p2p_dev_addr = msg.p2p_device_addr; 625 else if (msg.device_id) 626 p2p_dev_addr = msg.device_id; 627 else { 628 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 629 p2p_parse_free(&msg); 630 return -1; 631 } 632 633 if (!is_zero_ether_addr(p2p->peer_filter) && 634 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) { 635 p2p_dbg(p2p, "Do not add peer filter for " MACSTR 636 " due to peer filter", MAC2STR(p2p_dev_addr)); 637 p2p_parse_free(&msg); 638 return 0; 639 } 640 641 dev = p2p_create_device(p2p, p2p_dev_addr); 642 if (dev == NULL) { 643 p2p_parse_free(&msg); 644 return -1; 645 } 646 647 if (rx_time == NULL) { 648 os_get_reltime(&time_now); 649 rx_time = &time_now; 650 } 651 652 /* 653 * Update the device entry only if the new peer 654 * entry is newer than the one previously stored. 655 */ 656 if (dev->last_seen.sec > 0 && 657 os_reltime_before(rx_time, &dev->last_seen)) { 658 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)", 659 (unsigned int) rx_time->sec, 660 (unsigned int) rx_time->usec, 661 (unsigned int) dev->last_seen.sec, 662 (unsigned int) dev->last_seen.usec); 663 p2p_parse_free(&msg); 664 return -1; 665 } 666 667 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime)); 668 669 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 670 671 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0) 672 os_memcpy(dev->interface_addr, addr, ETH_ALEN); 673 if (msg.ssid && 674 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 675 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 676 != 0)) { 677 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]); 678 dev->oper_ssid_len = msg.ssid[1]; 679 } 680 681 if (freq >= 2412 && freq <= 2484 && msg.ds_params && 682 *msg.ds_params >= 1 && *msg.ds_params <= 14) { 683 int ds_freq; 684 if (*msg.ds_params == 14) 685 ds_freq = 2484; 686 else 687 ds_freq = 2407 + *msg.ds_params * 5; 688 if (freq != ds_freq) { 689 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz", 690 freq, ds_freq); 691 freq = ds_freq; 692 } 693 } 694 695 if (dev->listen_freq && dev->listen_freq != freq && scan_res) { 696 p2p_dbg(p2p, "Update Listen frequency based on scan results (" 697 MACSTR " %d -> %d MHz (DS param %d)", 698 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq, 699 freq, msg.ds_params ? *msg.ds_params : -1); 700 } 701 if (scan_res) { 702 dev->listen_freq = freq; 703 if (msg.group_info) 704 dev->oper_freq = freq; 705 } 706 dev->info.level = level; 707 708 p2p_copy_wps_info(p2p, dev, 0, &msg); 709 710 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 711 wpabuf_free(dev->info.wps_vendor_ext[i]); 712 dev->info.wps_vendor_ext[i] = NULL; 713 } 714 715 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 716 if (msg.wps_vendor_ext[i] == NULL) 717 break; 718 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy( 719 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]); 720 if (dev->info.wps_vendor_ext[i] == NULL) 721 break; 722 } 723 724 if (msg.wfd_subelems) { 725 wpabuf_free(dev->info.wfd_subelems); 726 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 727 } 728 729 if (scan_res) { 730 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq, 731 msg.group_info, msg.group_info_len); 732 } 733 734 p2p_parse_free(&msg); 735 736 if (dev->flags & P2P_DEV_REPORTED) 737 return 0; 738 739 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)", 740 freq, (unsigned int) rx_time->sec, 741 (unsigned int) rx_time->usec); 742 if (dev->flags & P2P_DEV_USER_REJECTED) { 743 p2p_dbg(p2p, "Do not report rejected device"); 744 return 0; 745 } 746 747 if (dev->info.config_methods == 0 && 748 (freq == 2412 || freq == 2437 || freq == 2462)) { 749 /* 750 * If we have only seen a Beacon frame from a GO, we do not yet 751 * know what WPS config methods it supports. Since some 752 * applications use config_methods value from P2P-DEVICE-FOUND 753 * events, postpone reporting this peer until we've fully 754 * discovered its capabilities. 755 * 756 * At least for now, do this only if the peer was detected on 757 * one of the social channels since that peer can be easily be 758 * found again and there are no limitations of having to use 759 * passive scan on this channels, so this can be done through 760 * Probe Response frame that includes the config_methods 761 * information. 762 */ 763 p2p_dbg(p2p, "Do not report peer " MACSTR 764 " with unknown config methods", MAC2STR(addr)); 765 return 0; 766 } 767 768 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 769 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 770 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 771 772 return 0; 773} 774 775 776static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev) 777{ 778 int i; 779 780 if (p2p->go_neg_peer == dev) { 781 /* 782 * If GO Negotiation is in progress, report that it has failed. 783 */ 784 p2p_go_neg_failed(p2p, dev, -1); 785 p2p->go_neg_peer = NULL; 786 } 787 if (p2p->invite_peer == dev) 788 p2p->invite_peer = NULL; 789 if (p2p->sd_peer == dev) 790 p2p->sd_peer = NULL; 791 if (p2p->pending_client_disc_go == dev) 792 p2p->pending_client_disc_go = NULL; 793 794 /* dev_lost() device, but only if it was previously dev_found() */ 795 if (dev->flags & P2P_DEV_REPORTED_ONCE) 796 p2p->cfg->dev_lost(p2p->cfg->cb_ctx, 797 dev->info.p2p_device_addr); 798 799 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 800 wpabuf_free(dev->info.wps_vendor_ext[i]); 801 dev->info.wps_vendor_ext[i] = NULL; 802 } 803 804 wpabuf_free(dev->info.wfd_subelems); 805 806 os_free(dev); 807} 808 809 810static int p2p_get_next_prog_freq(struct p2p_data *p2p) 811{ 812 struct p2p_channels *c; 813 struct p2p_reg_class *cla; 814 size_t cl, ch; 815 int found = 0; 816 u8 reg_class; 817 u8 channel; 818 int freq; 819 820 c = &p2p->cfg->channels; 821 for (cl = 0; cl < c->reg_classes; cl++) { 822 cla = &c->reg_class[cl]; 823 if (cla->reg_class != p2p->last_prog_scan_class) 824 continue; 825 for (ch = 0; ch < cla->channels; ch++) { 826 if (cla->channel[ch] == p2p->last_prog_scan_chan) { 827 found = 1; 828 break; 829 } 830 } 831 if (found) 832 break; 833 } 834 835 if (!found) { 836 /* Start from beginning */ 837 reg_class = c->reg_class[0].reg_class; 838 channel = c->reg_class[0].channel[0]; 839 } else { 840 /* Pick the next channel */ 841 ch++; 842 if (ch == cla->channels) { 843 cl++; 844 if (cl == c->reg_classes) 845 cl = 0; 846 ch = 0; 847 } 848 reg_class = c->reg_class[cl].reg_class; 849 channel = c->reg_class[cl].channel[ch]; 850 } 851 852 freq = p2p_channel_to_freq(reg_class, channel); 853 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz", 854 reg_class, channel, freq); 855 p2p->last_prog_scan_class = reg_class; 856 p2p->last_prog_scan_chan = channel; 857 858 if (freq == 2412 || freq == 2437 || freq == 2462) 859 return 0; /* No need to add social channels */ 860 return freq; 861} 862 863 864static void p2p_search(struct p2p_data *p2p) 865{ 866 int freq = 0; 867 enum p2p_scan_type type; 868 u16 pw_id = DEV_PW_DEFAULT; 869 int res; 870 871 if (p2p->drv_in_listen) { 872 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing"); 873 return; 874 } 875 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 876 877 if (p2p->find_type == P2P_FIND_PROGRESSIVE && 878 (freq = p2p_get_next_prog_freq(p2p)) > 0) { 879 type = P2P_SCAN_SOCIAL_PLUS_ONE; 880 p2p_dbg(p2p, "Starting search (+ freq %u)", freq); 881 } else { 882 type = P2P_SCAN_SOCIAL; 883 p2p_dbg(p2p, "Starting search"); 884 } 885 886 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq, 887 p2p->num_req_dev_types, p2p->req_dev_types, 888 p2p->find_dev_id, pw_id); 889 if (res < 0) { 890 p2p_dbg(p2p, "Scan request failed"); 891 p2p_continue_find(p2p); 892 } else { 893 p2p_dbg(p2p, "Running p2p_scan"); 894 p2p->p2p_scan_running = 1; 895 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 896 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 897 p2p, NULL); 898 } 899} 900 901 902static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx) 903{ 904 struct p2p_data *p2p = eloop_ctx; 905 p2p_dbg(p2p, "Find timeout -> stop"); 906 p2p_stop_find(p2p); 907} 908 909 910static int p2p_run_after_scan(struct p2p_data *p2p) 911{ 912 struct p2p_device *dev; 913 enum p2p_after_scan op; 914 915 if (p2p->after_scan_tx) { 916 p2p->after_scan_tx_in_progress = 1; 917 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion"); 918 p2p->cfg->send_action(p2p->cfg->cb_ctx, 919 p2p->after_scan_tx->freq, 920 p2p->after_scan_tx->dst, 921 p2p->after_scan_tx->src, 922 p2p->after_scan_tx->bssid, 923 (u8 *) (p2p->after_scan_tx + 1), 924 p2p->after_scan_tx->len, 925 p2p->after_scan_tx->wait_time); 926 os_free(p2p->after_scan_tx); 927 p2p->after_scan_tx = NULL; 928 return 1; 929 } 930 931 op = p2p->start_after_scan; 932 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 933 switch (op) { 934 case P2P_AFTER_SCAN_NOTHING: 935 break; 936 case P2P_AFTER_SCAN_LISTEN: 937 p2p_dbg(p2p, "Start previously requested Listen state"); 938 p2p_listen(p2p, p2p->pending_listen_sec * 1000 + 939 p2p->pending_listen_usec / 1000); 940 return 1; 941 case P2P_AFTER_SCAN_CONNECT: 942 p2p_dbg(p2p, "Start previously requested connect with " MACSTR, 943 MAC2STR(p2p->after_scan_peer)); 944 dev = p2p_get_device(p2p, p2p->after_scan_peer); 945 if (dev == NULL) { 946 p2p_dbg(p2p, "Peer not known anymore"); 947 break; 948 } 949 p2p_connect_send(p2p, dev); 950 return 1; 951 } 952 953 return 0; 954} 955 956 957static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx) 958{ 959 struct p2p_data *p2p = eloop_ctx; 960 int running; 961 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running); 962 running = p2p->p2p_scan_running; 963 /* Make sure we recover from missed scan results callback */ 964 p2p->p2p_scan_running = 0; 965 966 if (running) 967 p2p_run_after_scan(p2p); 968} 969 970 971static void p2p_free_req_dev_types(struct p2p_data *p2p) 972{ 973 p2p->num_req_dev_types = 0; 974 os_free(p2p->req_dev_types); 975 p2p->req_dev_types = NULL; 976} 977 978 979int p2p_find(struct p2p_data *p2p, unsigned int timeout, 980 enum p2p_discovery_type type, 981 unsigned int num_req_dev_types, const u8 *req_dev_types, 982 const u8 *dev_id, unsigned int search_delay) 983{ 984 int res; 985 986 p2p_dbg(p2p, "Starting find (type=%d)", type); 987 os_get_reltime(&p2p->find_start); 988 if (p2p->p2p_scan_running) { 989 p2p_dbg(p2p, "p2p_scan is already running"); 990 } 991 992 p2p_free_req_dev_types(p2p); 993 if (req_dev_types && num_req_dev_types) { 994 p2p->req_dev_types = os_malloc(num_req_dev_types * 995 WPS_DEV_TYPE_LEN); 996 if (p2p->req_dev_types == NULL) 997 return -1; 998 os_memcpy(p2p->req_dev_types, req_dev_types, 999 num_req_dev_types * WPS_DEV_TYPE_LEN); 1000 p2p->num_req_dev_types = num_req_dev_types; 1001 } 1002 1003 if (dev_id) { 1004 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN); 1005 p2p->find_dev_id = p2p->find_dev_id_buf; 1006 } else 1007 p2p->find_dev_id = NULL; 1008 1009 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1010 p2p_clear_timeout(p2p); 1011 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1012 p2p->find_type = type; 1013 p2p_device_clear_reported(p2p); 1014 p2p_set_state(p2p, P2P_SEARCH); 1015 p2p->search_delay = search_delay; 1016 p2p->in_search_delay = 0; 1017 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1018 p2p->last_p2p_find_timeout = timeout; 1019 if (timeout) 1020 eloop_register_timeout(timeout, 0, p2p_find_timeout, 1021 p2p, NULL); 1022 switch (type) { 1023 case P2P_FIND_START_WITH_FULL: 1024 case P2P_FIND_PROGRESSIVE: 1025 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0, 1026 p2p->num_req_dev_types, 1027 p2p->req_dev_types, dev_id, 1028 DEV_PW_DEFAULT); 1029 break; 1030 case P2P_FIND_ONLY_SOCIAL: 1031 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0, 1032 p2p->num_req_dev_types, 1033 p2p->req_dev_types, dev_id, 1034 DEV_PW_DEFAULT); 1035 break; 1036 default: 1037 return -1; 1038 } 1039 1040 if (res == 0) { 1041 p2p_dbg(p2p, "Running p2p_scan"); 1042 p2p->p2p_scan_running = 1; 1043 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 1044 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 1045 p2p, NULL); 1046 } else if (p2p->p2p_scan_running) { 1047 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running"); 1048 /* wait for the previous p2p_scan to complete */ 1049 res = 0; /* do not report failure */ 1050 } else { 1051 p2p_dbg(p2p, "Failed to start p2p_scan"); 1052 p2p_set_state(p2p, P2P_IDLE); 1053 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1054 } 1055 1056 return res; 1057} 1058 1059 1060void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq) 1061{ 1062 p2p_dbg(p2p, "Stopping find"); 1063 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1064 p2p_clear_timeout(p2p); 1065 if (p2p->state == P2P_SEARCH) 1066 p2p->cfg->find_stopped(p2p->cfg->cb_ctx); 1067 p2p_set_state(p2p, P2P_IDLE); 1068 p2p_free_req_dev_types(p2p); 1069 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1070 if (p2p->go_neg_peer) 1071 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1072 p2p->go_neg_peer = NULL; 1073 p2p->sd_peer = NULL; 1074 p2p->invite_peer = NULL; 1075 p2p_stop_listen_for_freq(p2p, freq); 1076} 1077 1078 1079void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq) 1080{ 1081 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) { 1082 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response"); 1083 return; 1084 } 1085 if (p2p->in_listen) { 1086 p2p->in_listen = 0; 1087 p2p_clear_timeout(p2p); 1088 } 1089 if (p2p->drv_in_listen) { 1090 /* 1091 * The driver may not deliver callback to p2p_listen_end() 1092 * when the operation gets canceled, so clear the internal 1093 * variable that is tracking driver state. 1094 */ 1095 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen); 1096 p2p->drv_in_listen = 0; 1097 } 1098 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1099} 1100 1101 1102void p2p_stop_listen(struct p2p_data *p2p) 1103{ 1104 if (p2p->state != P2P_LISTEN_ONLY) { 1105 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state."); 1106 return; 1107 } 1108 1109 p2p_stop_listen_for_freq(p2p, 0); 1110 p2p_set_state(p2p, P2P_IDLE); 1111} 1112 1113 1114void p2p_stop_find(struct p2p_data *p2p) 1115{ 1116 p2p_stop_find_for_freq(p2p, 0); 1117} 1118 1119 1120static int p2p_prepare_channel_pref(struct p2p_data *p2p, 1121 unsigned int force_freq, 1122 unsigned int pref_freq, int go) 1123{ 1124 u8 op_class, op_channel; 1125 unsigned int freq = force_freq ? force_freq : pref_freq; 1126 1127 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d", 1128 force_freq, pref_freq, go); 1129 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) { 1130 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq); 1131 return -1; 1132 } 1133 1134 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) && 1135 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class, 1136 op_channel))) { 1137 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P", 1138 freq, op_class, op_channel); 1139 return -1; 1140 } 1141 1142 p2p->op_reg_class = op_class; 1143 p2p->op_channel = op_channel; 1144 1145 if (force_freq) { 1146 p2p->channels.reg_classes = 1; 1147 p2p->channels.reg_class[0].channels = 1; 1148 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 1149 p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 1150 } else { 1151 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1152 sizeof(struct p2p_channels)); 1153 } 1154 1155 return 0; 1156} 1157 1158 1159static void p2p_prepare_channel_best(struct p2p_data *p2p) 1160{ 1161 u8 op_class, op_channel; 1162 const int op_classes_5ghz[] = { 124, 115, 0 }; 1163 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 }; 1164 const int op_classes_vht[] = { 128, 0 }; 1165 1166 p2p_dbg(p2p, "Prepare channel best"); 1167 1168 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 && 1169 p2p_supported_freq(p2p, p2p->best_freq_overall) && 1170 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel) 1171 == 0) { 1172 p2p_dbg(p2p, "Select best overall channel as operating channel preference"); 1173 p2p->op_reg_class = op_class; 1174 p2p->op_channel = op_channel; 1175 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 && 1176 p2p_supported_freq(p2p, p2p->best_freq_5) && 1177 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel) 1178 == 0) { 1179 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference"); 1180 p2p->op_reg_class = op_class; 1181 p2p->op_channel = op_channel; 1182 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 && 1183 p2p_supported_freq(p2p, p2p->best_freq_24) && 1184 p2p_freq_to_channel(p2p->best_freq_24, &op_class, 1185 &op_channel) == 0) { 1186 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference"); 1187 p2p->op_reg_class = op_class; 1188 p2p->op_channel = op_channel; 1189 } else if (p2p->cfg->num_pref_chan > 0 && 1190 p2p_channels_includes(&p2p->cfg->channels, 1191 p2p->cfg->pref_chan[0].op_class, 1192 p2p->cfg->pref_chan[0].chan)) { 1193 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference"); 1194 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class; 1195 p2p->op_channel = p2p->cfg->pref_chan[0].chan; 1196 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht, 1197 &p2p->op_reg_class, &p2p->op_channel) == 1198 0) { 1199 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference", 1200 p2p->op_reg_class, p2p->op_channel); 1201 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40, 1202 &p2p->op_reg_class, &p2p->op_channel) == 1203 0) { 1204 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference", 1205 p2p->op_reg_class, p2p->op_channel); 1206 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz, 1207 &p2p->op_reg_class, &p2p->op_channel) == 1208 0) { 1209 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference", 1210 p2p->op_reg_class, p2p->op_channel); 1211 } else { 1212 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference"); 1213 p2p->op_reg_class = p2p->cfg->op_reg_class; 1214 p2p->op_channel = p2p->cfg->op_channel; 1215 } 1216 1217 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1218 sizeof(struct p2p_channels)); 1219} 1220 1221 1222/** 1223 * p2p_prepare_channel - Select operating channel for GO Negotiation 1224 * @p2p: P2P module context from p2p_init() 1225 * @dev: Selected peer device 1226 * @force_freq: Forced frequency in MHz or 0 if not forced 1227 * @pref_freq: Preferred frequency in MHz or 0 if no preference 1228 * @go: Whether the local end will be forced to be GO 1229 * Returns: 0 on success, -1 on failure (channel not supported for P2P) 1230 * 1231 * This function is used to do initial operating channel selection for GO 1232 * Negotiation prior to having received peer information. The selected channel 1233 * may be further optimized in p2p_reselect_channel() once the peer information 1234 * is available. 1235 */ 1236int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev, 1237 unsigned int force_freq, unsigned int pref_freq, int go) 1238{ 1239 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d", 1240 force_freq, pref_freq, go); 1241 if (force_freq || pref_freq) { 1242 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) < 1243 0) 1244 return -1; 1245 } else { 1246 p2p_prepare_channel_best(p2p); 1247 } 1248 p2p_channels_dump(p2p, "prepared channels", &p2p->channels); 1249 if (go) 1250 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq); 1251 else if (!force_freq) 1252 p2p_channels_union(&p2p->channels, &p2p->cfg->cli_channels, 1253 &p2p->channels); 1254 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels); 1255 1256 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s", 1257 p2p->op_reg_class, p2p->op_channel, 1258 force_freq ? " (forced)" : ""); 1259 1260 if (force_freq) 1261 dev->flags |= P2P_DEV_FORCE_FREQ; 1262 else 1263 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1264 1265 return 0; 1266} 1267 1268 1269static void p2p_set_dev_persistent(struct p2p_device *dev, 1270 int persistent_group) 1271{ 1272 switch (persistent_group) { 1273 case 0: 1274 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP | 1275 P2P_DEV_PREFER_PERSISTENT_RECONN); 1276 break; 1277 case 1: 1278 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP; 1279 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN; 1280 break; 1281 case 2: 1282 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP | 1283 P2P_DEV_PREFER_PERSISTENT_RECONN; 1284 break; 1285 } 1286} 1287 1288 1289int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr, 1290 enum p2p_wps_method wps_method, 1291 int go_intent, const u8 *own_interface_addr, 1292 unsigned int force_freq, int persistent_group, 1293 const u8 *force_ssid, size_t force_ssid_len, 1294 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id) 1295{ 1296 struct p2p_device *dev; 1297 1298 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR 1299 " GO Intent=%d Intended Interface Address=" MACSTR 1300 " wps_method=%d persistent_group=%d pd_before_go_neg=%d " 1301 "oob_pw_id=%u", 1302 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1303 wps_method, persistent_group, pd_before_go_neg, oob_pw_id); 1304 1305 dev = p2p_get_device(p2p, peer_addr); 1306 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 1307 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR, 1308 MAC2STR(peer_addr)); 1309 return -1; 1310 } 1311 1312 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, 1313 go_intent == 15) < 0) 1314 return -1; 1315 1316 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 1317 if (!(dev->info.dev_capab & 1318 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 1319 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1320 " that is in a group and is not discoverable", 1321 MAC2STR(peer_addr)); 1322 return -1; 1323 } 1324 if (dev->oper_freq <= 0) { 1325 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1326 " with incomplete information", 1327 MAC2STR(peer_addr)); 1328 return -1; 1329 } 1330 1331 /* 1332 * First, try to connect directly. If the peer does not 1333 * acknowledge frames, assume it is sleeping and use device 1334 * discoverability via the GO at that point. 1335 */ 1336 } 1337 1338 p2p->ssid_set = 0; 1339 if (force_ssid) { 1340 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1341 force_ssid, force_ssid_len); 1342 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1343 p2p->ssid_len = force_ssid_len; 1344 p2p->ssid_set = 1; 1345 } 1346 1347 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1348 dev->flags &= ~P2P_DEV_USER_REJECTED; 1349 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 1350 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1351 if (pd_before_go_neg) 1352 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG; 1353 else { 1354 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG; 1355 /* 1356 * Assign dialog token and tie breaker here to use the same 1357 * values in each retry within the same GO Negotiation exchange. 1358 */ 1359 dev->dialog_token++; 1360 if (dev->dialog_token == 0) 1361 dev->dialog_token = 1; 1362 dev->tie_breaker = p2p->next_tie_breaker; 1363 p2p->next_tie_breaker = !p2p->next_tie_breaker; 1364 } 1365 dev->connect_reqs = 0; 1366 dev->go_neg_req_sent = 0; 1367 dev->go_state = UNKNOWN_GO; 1368 p2p_set_dev_persistent(dev, persistent_group); 1369 p2p->go_intent = go_intent; 1370 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1371 1372 if (p2p->state != P2P_IDLE) 1373 p2p_stop_find(p2p); 1374 1375 if (p2p->after_scan_tx) { 1376 /* 1377 * We need to drop the pending frame to avoid issues with the 1378 * new GO Negotiation, e.g., when the pending frame was from a 1379 * previous attempt at starting a GO Negotiation. 1380 */ 1381 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion"); 1382 os_free(p2p->after_scan_tx); 1383 p2p->after_scan_tx = NULL; 1384 } 1385 1386 dev->wps_method = wps_method; 1387 dev->oob_pw_id = oob_pw_id; 1388 dev->status = P2P_SC_SUCCESS; 1389 1390 if (p2p->p2p_scan_running) { 1391 p2p_dbg(p2p, "p2p_scan running - delay connect send"); 1392 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT; 1393 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN); 1394 return 0; 1395 } 1396 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1397 1398 return p2p_connect_send(p2p, dev); 1399} 1400 1401 1402int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr, 1403 enum p2p_wps_method wps_method, 1404 int go_intent, const u8 *own_interface_addr, 1405 unsigned int force_freq, int persistent_group, 1406 const u8 *force_ssid, size_t force_ssid_len, 1407 unsigned int pref_freq, u16 oob_pw_id) 1408{ 1409 struct p2p_device *dev; 1410 1411 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR 1412 " GO Intent=%d Intended Interface Address=" MACSTR 1413 " wps_method=%d persistent_group=%d oob_pw_id=%u", 1414 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1415 wps_method, persistent_group, oob_pw_id); 1416 1417 dev = p2p_get_device(p2p, peer_addr); 1418 if (dev == NULL) { 1419 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR, 1420 MAC2STR(peer_addr)); 1421 return -1; 1422 } 1423 1424 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent == 1425 15) < 0) 1426 return -1; 1427 1428 p2p->ssid_set = 0; 1429 if (force_ssid) { 1430 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1431 force_ssid, force_ssid_len); 1432 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1433 p2p->ssid_len = force_ssid_len; 1434 p2p->ssid_set = 1; 1435 } 1436 1437 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1438 dev->flags &= ~P2P_DEV_USER_REJECTED; 1439 dev->go_neg_req_sent = 0; 1440 dev->go_state = UNKNOWN_GO; 1441 p2p_set_dev_persistent(dev, persistent_group); 1442 p2p->go_intent = go_intent; 1443 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1444 1445 dev->wps_method = wps_method; 1446 dev->oob_pw_id = oob_pw_id; 1447 dev->status = P2P_SC_SUCCESS; 1448 1449 return 0; 1450} 1451 1452 1453void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr, 1454 struct p2p_device *dev, struct p2p_message *msg) 1455{ 1456 os_get_reltime(&dev->last_seen); 1457 1458 p2p_copy_wps_info(p2p, dev, 0, msg); 1459 1460 if (msg->listen_channel) { 1461 int freq; 1462 freq = p2p_channel_to_freq(msg->listen_channel[3], 1463 msg->listen_channel[4]); 1464 if (freq < 0) { 1465 p2p_dbg(p2p, "Unknown peer Listen channel: " 1466 "country=%c%c(0x%02x) reg_class=%u channel=%u", 1467 msg->listen_channel[0], 1468 msg->listen_channel[1], 1469 msg->listen_channel[2], 1470 msg->listen_channel[3], 1471 msg->listen_channel[4]); 1472 } else { 1473 p2p_dbg(p2p, "Update peer " MACSTR 1474 " Listen channel: %u -> %u MHz", 1475 MAC2STR(dev->info.p2p_device_addr), 1476 dev->listen_freq, freq); 1477 dev->listen_freq = freq; 1478 } 1479 } 1480 1481 if (msg->wfd_subelems) { 1482 wpabuf_free(dev->info.wfd_subelems); 1483 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems); 1484 } 1485 1486 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 1487 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 1488 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request"); 1489 } else { 1490 p2p_dbg(p2p, "Created device entry based on GO Neg Req: " 1491 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' " 1492 "listen_freq=%d", 1493 MAC2STR(dev->info.p2p_device_addr), 1494 dev->info.dev_capab, dev->info.group_capab, 1495 dev->info.device_name, dev->listen_freq); 1496 } 1497 1498 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY; 1499 1500 if (dev->flags & P2P_DEV_USER_REJECTED) { 1501 p2p_dbg(p2p, "Do not report rejected device"); 1502 return; 1503 } 1504 1505 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 1506 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 1507 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 1508} 1509 1510 1511void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len) 1512{ 1513 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 1514 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2); 1515 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2], 1516 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len); 1517 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len; 1518} 1519 1520 1521int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params) 1522{ 1523 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len); 1524 p2p_random(params->passphrase, 8); 1525 return 0; 1526} 1527 1528 1529void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer) 1530{ 1531 struct p2p_go_neg_results res; 1532 int go = peer->go_state == LOCAL_GO; 1533 struct p2p_channels intersection; 1534 int freqs; 1535 size_t i, j; 1536 1537 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)", 1538 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer"); 1539 1540 os_memset(&res, 0, sizeof(res)); 1541 res.role_go = go; 1542 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 1543 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 1544 res.wps_method = peer->wps_method; 1545 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 1546 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 1547 res.persistent_group = 2; 1548 else 1549 res.persistent_group = 1; 1550 } 1551 1552 if (go) { 1553 /* Setup AP mode for WPS provisioning */ 1554 res.freq = p2p_channel_to_freq(p2p->op_reg_class, 1555 p2p->op_channel); 1556 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1557 res.ssid_len = p2p->ssid_len; 1558 p2p_random(res.passphrase, 8); 1559 } else { 1560 res.freq = peer->oper_freq; 1561 if (p2p->ssid_len) { 1562 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1563 res.ssid_len = p2p->ssid_len; 1564 } 1565 } 1566 1567 p2p_channels_dump(p2p, "own channels", &p2p->channels); 1568 p2p_channels_dump(p2p, "peer channels", &peer->channels); 1569 p2p_channels_intersect(&p2p->channels, &peer->channels, 1570 &intersection); 1571 if (go) { 1572 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq); 1573 p2p_channels_dump(p2p, "intersection after no-GO removal", 1574 &intersection); 1575 } 1576 freqs = 0; 1577 for (i = 0; i < intersection.reg_classes; i++) { 1578 struct p2p_reg_class *c = &intersection.reg_class[i]; 1579 if (freqs + 1 == P2P_MAX_CHANNELS) 1580 break; 1581 for (j = 0; j < c->channels; j++) { 1582 int freq; 1583 if (freqs + 1 == P2P_MAX_CHANNELS) 1584 break; 1585 freq = p2p_channel_to_freq(c->reg_class, c->channel[j]); 1586 if (freq < 0) 1587 continue; 1588 res.freq_list[freqs++] = freq; 1589 } 1590 } 1591 1592 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout; 1593 1594 p2p_clear_timeout(p2p); 1595 p2p->ssid_set = 0; 1596 peer->go_neg_req_sent = 0; 1597 peer->wps_method = WPS_NOT_READY; 1598 peer->oob_pw_id = 0; 1599 1600 p2p_set_state(p2p, P2P_PROVISIONING); 1601 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 1602} 1603 1604 1605static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa, 1606 const u8 *data, size_t len, int rx_freq) 1607{ 1608 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa)); 1609 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len); 1610 1611 if (len < 1) 1612 return; 1613 1614 switch (data[0]) { 1615 case P2P_GO_NEG_REQ: 1616 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq); 1617 break; 1618 case P2P_GO_NEG_RESP: 1619 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq); 1620 break; 1621 case P2P_GO_NEG_CONF: 1622 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1); 1623 break; 1624 case P2P_INVITATION_REQ: 1625 p2p_process_invitation_req(p2p, sa, data + 1, len - 1, 1626 rx_freq); 1627 break; 1628 case P2P_INVITATION_RESP: 1629 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 1630 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1); 1631 break; 1632 case P2P_PROV_DISC_REQ: 1633 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1634 break; 1635 case P2P_PROV_DISC_RESP: 1636 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1); 1637 break; 1638 case P2P_DEV_DISC_REQ: 1639 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1640 break; 1641 case P2P_DEV_DISC_RESP: 1642 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1); 1643 break; 1644 default: 1645 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d", 1646 data[0]); 1647 break; 1648 } 1649} 1650 1651 1652static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, 1653 const u8 *sa, const u8 *bssid, const u8 *data, 1654 size_t len, int freq) 1655{ 1656 if (len < 1) 1657 return; 1658 1659 switch (data[0]) { 1660 case WLAN_PA_VENDOR_SPECIFIC: 1661 data++; 1662 len--; 1663 if (len < 4) 1664 return; 1665 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1666 return; 1667 1668 data += 4; 1669 len -= 4; 1670 1671 p2p_rx_p2p_action(p2p, sa, data, len, freq); 1672 break; 1673 case WLAN_PA_GAS_INITIAL_REQ: 1674 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq); 1675 break; 1676 case WLAN_PA_GAS_INITIAL_RESP: 1677 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq); 1678 break; 1679 case WLAN_PA_GAS_COMEBACK_REQ: 1680 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq); 1681 break; 1682 case WLAN_PA_GAS_COMEBACK_RESP: 1683 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq); 1684 break; 1685 } 1686} 1687 1688 1689void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa, 1690 const u8 *bssid, u8 category, 1691 const u8 *data, size_t len, int freq) 1692{ 1693 if (category == WLAN_ACTION_PUBLIC) { 1694 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq); 1695 return; 1696 } 1697 1698 if (category != WLAN_ACTION_VENDOR_SPECIFIC) 1699 return; 1700 1701 if (len < 4) 1702 return; 1703 1704 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1705 return; 1706 data += 4; 1707 len -= 4; 1708 1709 /* P2P action frame */ 1710 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa)); 1711 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len); 1712 1713 if (len < 1) 1714 return; 1715 switch (data[0]) { 1716 case P2P_NOA: 1717 p2p_dbg(p2p, "Received P2P Action - Notice of Absence"); 1718 /* TODO */ 1719 break; 1720 case P2P_PRESENCE_REQ: 1721 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq); 1722 break; 1723 case P2P_PRESENCE_RESP: 1724 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1); 1725 break; 1726 case P2P_GO_DISC_REQ: 1727 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq); 1728 break; 1729 default: 1730 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]); 1731 break; 1732 } 1733} 1734 1735 1736static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx) 1737{ 1738 struct p2p_data *p2p = eloop_ctx; 1739 if (p2p->go_neg_peer == NULL) 1740 return; 1741 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1742 p2p->go_neg_peer->status = P2P_SC_SUCCESS; 1743 p2p_connect_send(p2p, p2p->go_neg_peer); 1744} 1745 1746 1747static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx) 1748{ 1749 struct p2p_data *p2p = eloop_ctx; 1750 if (p2p->invite_peer == NULL) 1751 return; 1752 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1753 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr, 1754 p2p->invite_dev_pw_id); 1755} 1756 1757 1758static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr, 1759 const u8 *ie, size_t ie_len) 1760{ 1761 struct p2p_message msg; 1762 struct p2p_device *dev; 1763 1764 os_memset(&msg, 0, sizeof(msg)); 1765 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL) 1766 { 1767 p2p_parse_free(&msg); 1768 return; /* not a P2P probe */ 1769 } 1770 1771 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 1772 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 1773 != 0) { 1774 /* The Probe Request is not part of P2P Device Discovery. It is 1775 * not known whether the source address of the frame is the P2P 1776 * Device Address or P2P Interface Address. Do not add a new 1777 * peer entry based on this frames. 1778 */ 1779 p2p_parse_free(&msg); 1780 return; 1781 } 1782 1783 dev = p2p_get_device(p2p, addr); 1784 if (dev) { 1785 if (dev->country[0] == 0 && msg.listen_channel) 1786 os_memcpy(dev->country, msg.listen_channel, 3); 1787 os_get_reltime(&dev->last_seen); 1788 p2p_parse_free(&msg); 1789 return; /* already known */ 1790 } 1791 1792 dev = p2p_create_device(p2p, addr); 1793 if (dev == NULL) { 1794 p2p_parse_free(&msg); 1795 return; 1796 } 1797 1798 os_get_reltime(&dev->last_seen); 1799 dev->flags |= P2P_DEV_PROBE_REQ_ONLY; 1800 1801 if (msg.listen_channel) { 1802 os_memcpy(dev->country, msg.listen_channel, 3); 1803 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3], 1804 msg.listen_channel[4]); 1805 } 1806 1807 p2p_copy_wps_info(p2p, dev, 1, &msg); 1808 1809 if (msg.wfd_subelems) { 1810 wpabuf_free(dev->info.wfd_subelems); 1811 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 1812 } 1813 1814 p2p_parse_free(&msg); 1815 1816 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR 1817 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d", 1818 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab, 1819 dev->info.group_capab, dev->info.device_name, 1820 dev->listen_freq); 1821} 1822 1823 1824struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p, 1825 const u8 *addr, 1826 struct p2p_message *msg) 1827{ 1828 struct p2p_device *dev; 1829 1830 dev = p2p_get_device(p2p, addr); 1831 if (dev) { 1832 os_get_reltime(&dev->last_seen); 1833 return dev; /* already known */ 1834 } 1835 1836 dev = p2p_create_device(p2p, addr); 1837 if (dev == NULL) 1838 return NULL; 1839 1840 p2p_add_dev_info(p2p, addr, dev, msg); 1841 1842 return dev; 1843} 1844 1845 1846static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type) 1847{ 1848 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0) 1849 return 1; 1850 if (os_memcmp(dev_type, req_dev_type, 2) == 0 && 1851 WPA_GET_BE32(&req_dev_type[2]) == 0 && 1852 WPA_GET_BE16(&req_dev_type[6]) == 0) 1853 return 1; /* Category match with wildcard OUI/sub-category */ 1854 return 0; 1855} 1856 1857 1858int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[], 1859 size_t num_req_dev_type) 1860{ 1861 size_t i; 1862 for (i = 0; i < num_req_dev_type; i++) { 1863 if (dev_type_match(dev_type, req_dev_type[i])) 1864 return 1; 1865 } 1866 return 0; 1867} 1868 1869 1870/** 1871 * p2p_match_dev_type - Match local device type with requested type 1872 * @p2p: P2P module context from p2p_init() 1873 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) 1874 * Returns: 1 on match, 0 on mismatch 1875 * 1876 * This function can be used to match the Requested Device Type attribute in 1877 * WPS IE with the local device types for deciding whether to reply to a Probe 1878 * Request frame. 1879 */ 1880int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps) 1881{ 1882 struct wps_parse_attr attr; 1883 size_t i; 1884 1885 if (wps_parse_msg(wps, &attr)) 1886 return 1; /* assume no Requested Device Type attributes */ 1887 1888 if (attr.num_req_dev_type == 0) 1889 return 1; /* no Requested Device Type attributes -> match */ 1890 1891 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type, 1892 attr.num_req_dev_type)) 1893 return 1; /* Own Primary Device Type matches */ 1894 1895 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) 1896 if (dev_type_list_match(p2p->cfg->sec_dev_type[i], 1897 attr.req_dev_type, 1898 attr.num_req_dev_type)) 1899 return 1; /* Own Secondary Device Type matches */ 1900 1901 /* No matching device type found */ 1902 return 0; 1903} 1904 1905 1906struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p) 1907{ 1908 struct wpabuf *buf; 1909 u8 *len; 1910 int pw_id = -1; 1911 size_t extra = 0; 1912 1913#ifdef CONFIG_WIFI_DISPLAY 1914 if (p2p->wfd_ie_probe_resp) 1915 extra = wpabuf_len(p2p->wfd_ie_probe_resp); 1916#endif /* CONFIG_WIFI_DISPLAY */ 1917 1918 buf = wpabuf_alloc(1000 + extra); 1919 if (buf == NULL) 1920 return NULL; 1921 1922 if (p2p->go_neg_peer) { 1923 /* Advertise immediate availability of WPS credential */ 1924 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method); 1925 } 1926 1927 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) { 1928 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response"); 1929 wpabuf_free(buf); 1930 return NULL; 1931 } 1932 1933#ifdef CONFIG_WIFI_DISPLAY 1934 if (p2p->wfd_ie_probe_resp) 1935 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp); 1936#endif /* CONFIG_WIFI_DISPLAY */ 1937 1938 /* P2P IE */ 1939 len = p2p_buf_add_ie_hdr(buf); 1940 p2p_buf_add_capability(buf, p2p->dev_capab & 1941 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 1942 if (p2p->ext_listen_interval) 1943 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 1944 p2p->ext_listen_interval); 1945 p2p_buf_add_device_info(buf, p2p, NULL); 1946 p2p_buf_update_ie_hdr(buf, len); 1947 1948 return buf; 1949} 1950 1951 1952static enum p2p_probe_req_status 1953p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 1954 const u8 *bssid, const u8 *ie, size_t ie_len) 1955{ 1956 struct ieee802_11_elems elems; 1957 struct wpabuf *buf; 1958 struct ieee80211_mgmt *resp; 1959 struct p2p_message msg; 1960 struct wpabuf *ies; 1961 1962 if (!p2p->in_listen || !p2p->drv_in_listen) { 1963 /* not in Listen state - ignore Probe Request */ 1964 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request", 1965 p2p->in_listen, p2p->drv_in_listen); 1966 return P2P_PREQ_NOT_LISTEN; 1967 } 1968 1969 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) == 1970 ParseFailed) { 1971 /* Ignore invalid Probe Request frames */ 1972 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it"); 1973 return P2P_PREQ_MALFORMED; 1974 } 1975 1976 if (elems.p2p == NULL) { 1977 /* not a P2P probe - ignore it */ 1978 p2p_dbg(p2p, "Not a P2P probe - ignore it"); 1979 return P2P_PREQ_NOT_P2P; 1980 } 1981 1982 if (dst && !is_broadcast_ether_addr(dst) && 1983 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 1984 /* Not sent to the broadcast address or our P2P Device Address 1985 */ 1986 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it", 1987 MAC2STR(dst)); 1988 return P2P_PREQ_NOT_PROCESSED; 1989 } 1990 1991 if (bssid && !is_broadcast_ether_addr(bssid)) { 1992 /* Not sent to the Wildcard BSSID */ 1993 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it", 1994 MAC2STR(bssid)); 1995 return P2P_PREQ_NOT_PROCESSED; 1996 } 1997 1998 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN || 1999 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) != 2000 0) { 2001 /* not using P2P Wildcard SSID - ignore */ 2002 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it"); 2003 return P2P_PREQ_NOT_PROCESSED; 2004 } 2005 2006 if (supp_rates_11b_only(&elems)) { 2007 /* Indicates support for 11b rates only */ 2008 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it"); 2009 return P2P_PREQ_NOT_P2P; 2010 } 2011 2012 os_memset(&msg, 0, sizeof(msg)); 2013 if (p2p_parse_ies(ie, ie_len, &msg) < 0) { 2014 /* Could not parse P2P attributes */ 2015 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it"); 2016 return P2P_PREQ_NOT_P2P; 2017 } 2018 2019 if (msg.device_id && 2020 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2021 /* Device ID did not match */ 2022 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it", 2023 MAC2STR(msg.device_id)); 2024 p2p_parse_free(&msg); 2025 return P2P_PREQ_NOT_PROCESSED; 2026 } 2027 2028 /* Check Requested Device Type match */ 2029 if (msg.wps_attributes && 2030 !p2p_match_dev_type(p2p, msg.wps_attributes)) { 2031 /* No match with Requested Device Type */ 2032 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it"); 2033 p2p_parse_free(&msg); 2034 return P2P_PREQ_NOT_PROCESSED; 2035 } 2036 p2p_parse_free(&msg); 2037 2038 if (!p2p->cfg->send_probe_resp) { 2039 /* Response generated elsewhere */ 2040 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response"); 2041 return P2P_PREQ_NOT_PROCESSED; 2042 } 2043 2044 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state"); 2045 2046 /* 2047 * We do not really have a specific BSS that this frame is advertising, 2048 * so build a frame that has some information in valid format. This is 2049 * really only used for discovery purposes, not to learn exact BSS 2050 * parameters. 2051 */ 2052 ies = p2p_build_probe_resp_ies(p2p); 2053 if (ies == NULL) 2054 return P2P_PREQ_NOT_PROCESSED; 2055 2056 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 2057 if (buf == NULL) { 2058 wpabuf_free(ies); 2059 return P2P_PREQ_NOT_PROCESSED; 2060 } 2061 2062 resp = NULL; 2063 resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp); 2064 2065 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 2066 (WLAN_FC_STYPE_PROBE_RESP << 4)); 2067 os_memcpy(resp->da, addr, ETH_ALEN); 2068 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN); 2069 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN); 2070 resp->u.probe_resp.beacon_int = host_to_le16(100); 2071 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 2072 resp->u.probe_resp.capab_info = 2073 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE | 2074 WLAN_CAPABILITY_PRIVACY | 2075 WLAN_CAPABILITY_SHORT_SLOT_TIME); 2076 2077 wpabuf_put_u8(buf, WLAN_EID_SSID); 2078 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN); 2079 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 2080 2081 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES); 2082 wpabuf_put_u8(buf, 8); 2083 wpabuf_put_u8(buf, (60 / 5) | 0x80); 2084 wpabuf_put_u8(buf, 90 / 5); 2085 wpabuf_put_u8(buf, (120 / 5) | 0x80); 2086 wpabuf_put_u8(buf, 180 / 5); 2087 wpabuf_put_u8(buf, (240 / 5) | 0x80); 2088 wpabuf_put_u8(buf, 360 / 5); 2089 wpabuf_put_u8(buf, 480 / 5); 2090 wpabuf_put_u8(buf, 540 / 5); 2091 2092 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS); 2093 wpabuf_put_u8(buf, 1); 2094 wpabuf_put_u8(buf, p2p->cfg->channel); 2095 2096 wpabuf_put_buf(buf, ies); 2097 wpabuf_free(ies); 2098 2099 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf); 2100 2101 wpabuf_free(buf); 2102 2103 return P2P_PREQ_NOT_PROCESSED; 2104} 2105 2106 2107enum p2p_probe_req_status 2108p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2109 const u8 *bssid, const u8 *ie, size_t ie_len) 2110{ 2111 enum p2p_probe_req_status res; 2112 2113 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len); 2114 2115 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len); 2116 2117 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) && 2118 p2p->go_neg_peer && 2119 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN) 2120 == 0 && 2121 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 2122 /* Received a Probe Request from GO Negotiation peer */ 2123 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout"); 2124 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2125 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL); 2126 return P2P_PREQ_PROCESSED; 2127 } 2128 2129 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) && 2130 p2p->invite_peer && 2131 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) && 2132 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN) 2133 == 0) { 2134 /* Received a Probe Request from Invite peer */ 2135 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout"); 2136 eloop_cancel_timeout(p2p_invite_start, p2p, NULL); 2137 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL); 2138 return P2P_PREQ_PROCESSED; 2139 } 2140 2141 return res; 2142} 2143 2144 2145static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid, 2146 u8 *buf, size_t len, struct wpabuf *p2p_ie) 2147{ 2148 struct wpabuf *tmp; 2149 u8 *lpos; 2150 size_t tmplen; 2151 int res; 2152 u8 group_capab; 2153 2154 if (p2p_ie == NULL) 2155 return 0; /* WLAN AP is not a P2P manager */ 2156 2157 /* 2158 * (Re)Association Request - P2P IE 2159 * P2P Capability attribute (shall be present) 2160 * P2P Interface attribute (present if concurrent device and 2161 * P2P Management is enabled) 2162 */ 2163 tmp = wpabuf_alloc(200); 2164 if (tmp == NULL) 2165 return -1; 2166 2167 lpos = p2p_buf_add_ie_hdr(tmp); 2168 group_capab = 0; 2169 if (p2p->num_groups > 0) { 2170 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; 2171 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2172 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) && 2173 p2p->cross_connect) 2174 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 2175 } 2176 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab); 2177 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2178 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED)) 2179 p2p_buf_add_p2p_interface(tmp, p2p); 2180 p2p_buf_update_ie_hdr(tmp, lpos); 2181 2182 tmplen = wpabuf_len(tmp); 2183 if (tmplen > len) 2184 res = -1; 2185 else { 2186 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2187 res = tmplen; 2188 } 2189 wpabuf_free(tmp); 2190 2191 return res; 2192} 2193 2194 2195int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf, 2196 size_t len, int p2p_group, struct wpabuf *p2p_ie) 2197{ 2198 struct wpabuf *tmp; 2199 u8 *lpos; 2200 struct p2p_device *peer; 2201 size_t tmplen; 2202 int res; 2203 size_t extra = 0; 2204 2205 if (!p2p_group) 2206 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie); 2207 2208#ifdef CONFIG_WIFI_DISPLAY 2209 if (p2p->wfd_ie_assoc_req) 2210 extra = wpabuf_len(p2p->wfd_ie_assoc_req); 2211#endif /* CONFIG_WIFI_DISPLAY */ 2212 2213 /* 2214 * (Re)Association Request - P2P IE 2215 * P2P Capability attribute (shall be present) 2216 * Extended Listen Timing (may be present) 2217 * P2P Device Info attribute (shall be present) 2218 */ 2219 tmp = wpabuf_alloc(200 + extra); 2220 if (tmp == NULL) 2221 return -1; 2222 2223#ifdef CONFIG_WIFI_DISPLAY 2224 if (p2p->wfd_ie_assoc_req) 2225 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req); 2226#endif /* CONFIG_WIFI_DISPLAY */ 2227 2228 peer = bssid ? p2p_get_device(p2p, bssid) : NULL; 2229 2230 lpos = p2p_buf_add_ie_hdr(tmp); 2231 p2p_buf_add_capability(tmp, p2p->dev_capab, 0); 2232 if (p2p->ext_listen_interval) 2233 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period, 2234 p2p->ext_listen_interval); 2235 p2p_buf_add_device_info(tmp, p2p, peer); 2236 p2p_buf_update_ie_hdr(tmp, lpos); 2237 2238 tmplen = wpabuf_len(tmp); 2239 if (tmplen > len) 2240 res = -1; 2241 else { 2242 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2243 res = tmplen; 2244 } 2245 wpabuf_free(tmp); 2246 2247 return res; 2248} 2249 2250 2251int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) 2252{ 2253 struct wpabuf *p2p_ie; 2254 int ret; 2255 2256 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); 2257 if (p2p_ie == NULL) 2258 return 0; 2259 2260 ret = p2p_attr_text(p2p_ie, buf, end); 2261 wpabuf_free(p2p_ie); 2262 return ret; 2263} 2264 2265 2266int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr) 2267{ 2268 struct p2p_message msg; 2269 2270 os_memset(&msg, 0, sizeof(msg)); 2271 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 2272 return -1; 2273 2274 if (msg.p2p_device_addr) { 2275 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); 2276 return 0; 2277 } else if (msg.device_id) { 2278 os_memcpy(dev_addr, msg.device_id, ETH_ALEN); 2279 return 0; 2280 } 2281 return -1; 2282} 2283 2284 2285int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr) 2286{ 2287 struct wpabuf *p2p_ie; 2288 int ret; 2289 2290 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 2291 P2P_IE_VENDOR_TYPE); 2292 if (p2p_ie == NULL) 2293 return -1; 2294 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr); 2295 wpabuf_free(p2p_ie); 2296 return ret; 2297} 2298 2299 2300static void p2p_clear_go_neg(struct p2p_data *p2p) 2301{ 2302 p2p->go_neg_peer = NULL; 2303 p2p_clear_timeout(p2p); 2304 p2p_set_state(p2p, P2P_IDLE); 2305} 2306 2307 2308void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr) 2309{ 2310 if (p2p->go_neg_peer == NULL) { 2311 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification"); 2312 return; /* No pending Group Formation */ 2313 } 2314 2315 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) != 2316 0) { 2317 p2p_dbg(p2p, "Ignore WPS registration success notification for " 2318 MACSTR " (GO Negotiation peer " MACSTR ")", 2319 MAC2STR(mac_addr), 2320 MAC2STR(p2p->go_neg_peer->intended_addr)); 2321 return; /* Ignore unexpected peer address */ 2322 } 2323 2324 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR, 2325 MAC2STR(mac_addr)); 2326 2327 p2p_clear_go_neg(p2p); 2328} 2329 2330 2331void p2p_group_formation_failed(struct p2p_data *p2p) 2332{ 2333 if (p2p->go_neg_peer == NULL) { 2334 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification"); 2335 return; /* No pending Group Formation */ 2336 } 2337 2338 p2p_dbg(p2p, "Group Formation failed with " MACSTR, 2339 MAC2STR(p2p->go_neg_peer->intended_addr)); 2340 2341 p2p_clear_go_neg(p2p); 2342} 2343 2344 2345struct p2p_data * p2p_init(const struct p2p_config *cfg) 2346{ 2347 struct p2p_data *p2p; 2348 2349 if (cfg->max_peers < 1) 2350 return NULL; 2351 2352 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg)); 2353 if (p2p == NULL) 2354 return NULL; 2355 p2p->cfg = (struct p2p_config *) (p2p + 1); 2356 os_memcpy(p2p->cfg, cfg, sizeof(*cfg)); 2357 if (cfg->dev_name) 2358 p2p->cfg->dev_name = os_strdup(cfg->dev_name); 2359 if (cfg->manufacturer) 2360 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer); 2361 if (cfg->model_name) 2362 p2p->cfg->model_name = os_strdup(cfg->model_name); 2363 if (cfg->model_number) 2364 p2p->cfg->model_number = os_strdup(cfg->model_number); 2365 if (cfg->serial_number) 2366 p2p->cfg->serial_number = os_strdup(cfg->serial_number); 2367 if (cfg->pref_chan) { 2368 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan * 2369 sizeof(struct p2p_channel)); 2370 if (p2p->cfg->pref_chan) { 2371 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan, 2372 cfg->num_pref_chan * 2373 sizeof(struct p2p_channel)); 2374 } else 2375 p2p->cfg->num_pref_chan = 0; 2376 } 2377 2378 p2p->min_disc_int = 1; 2379 p2p->max_disc_int = 3; 2380 p2p->max_disc_tu = -1; 2381 2382 os_get_random(&p2p->next_tie_breaker, 1); 2383 p2p->next_tie_breaker &= 0x01; 2384 if (cfg->sd_request) 2385 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 2386 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE; 2387 if (cfg->concurrent_operations) 2388 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER; 2389 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 2390 2391 dl_list_init(&p2p->devices); 2392 2393 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 2394 p2p_expiration_timeout, p2p, NULL); 2395 2396 p2p->go_timeout = 100; 2397 p2p->client_timeout = 20; 2398 p2p->num_p2p_sd_queries = 0; 2399 2400 p2p_dbg(p2p, "initialized"); 2401 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 2402 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 2403 2404 return p2p; 2405} 2406 2407 2408void p2p_deinit(struct p2p_data *p2p) 2409{ 2410#ifdef CONFIG_WIFI_DISPLAY 2411 wpabuf_free(p2p->wfd_ie_beacon); 2412 wpabuf_free(p2p->wfd_ie_probe_req); 2413 wpabuf_free(p2p->wfd_ie_probe_resp); 2414 wpabuf_free(p2p->wfd_ie_assoc_req); 2415 wpabuf_free(p2p->wfd_ie_invitation); 2416 wpabuf_free(p2p->wfd_ie_prov_disc_req); 2417 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 2418 wpabuf_free(p2p->wfd_ie_go_neg); 2419 wpabuf_free(p2p->wfd_dev_info); 2420 wpabuf_free(p2p->wfd_assoc_bssid); 2421 wpabuf_free(p2p->wfd_coupled_sink_info); 2422#endif /* CONFIG_WIFI_DISPLAY */ 2423 2424 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL); 2425 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 2426 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2427 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2428 p2p_flush(p2p); 2429 p2p_free_req_dev_types(p2p); 2430 os_free(p2p->cfg->dev_name); 2431 os_free(p2p->cfg->manufacturer); 2432 os_free(p2p->cfg->model_name); 2433 os_free(p2p->cfg->model_number); 2434 os_free(p2p->cfg->serial_number); 2435 os_free(p2p->cfg->pref_chan); 2436 os_free(p2p->groups); 2437 wpabuf_free(p2p->sd_resp); 2438 os_free(p2p->after_scan_tx); 2439 p2p_remove_wps_vendor_extensions(p2p); 2440 os_free(p2p->no_go_freq.range); 2441 os_free(p2p); 2442} 2443 2444 2445void p2p_flush(struct p2p_data *p2p) 2446{ 2447 struct p2p_device *dev, *prev; 2448 p2p_stop_find(p2p); 2449 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device, 2450 list) { 2451 dl_list_del(&dev->list); 2452 p2p_device_free(p2p, dev); 2453 } 2454 p2p_free_sd_queries(p2p); 2455 os_free(p2p->after_scan_tx); 2456 p2p->after_scan_tx = NULL; 2457} 2458 2459 2460int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr) 2461{ 2462 struct p2p_device *dev; 2463 2464 dev = p2p_get_device(p2p, addr); 2465 if (dev == NULL) 2466 return -1; 2467 2468 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr)); 2469 2470 if (p2p->go_neg_peer == dev) 2471 p2p->go_neg_peer = NULL; 2472 2473 dev->wps_method = WPS_NOT_READY; 2474 dev->oob_pw_id = 0; 2475 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 2476 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 2477 2478 /* Check if after_scan_tx is for this peer. If so free it */ 2479 if (p2p->after_scan_tx && 2480 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) { 2481 os_free(p2p->after_scan_tx); 2482 p2p->after_scan_tx = NULL; 2483 } 2484 2485 return 0; 2486} 2487 2488 2489int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name) 2490{ 2491 os_free(p2p->cfg->dev_name); 2492 if (dev_name) { 2493 p2p->cfg->dev_name = os_strdup(dev_name); 2494 if (p2p->cfg->dev_name == NULL) 2495 return -1; 2496 } else 2497 p2p->cfg->dev_name = NULL; 2498 return 0; 2499} 2500 2501 2502int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer) 2503{ 2504 os_free(p2p->cfg->manufacturer); 2505 p2p->cfg->manufacturer = NULL; 2506 if (manufacturer) { 2507 p2p->cfg->manufacturer = os_strdup(manufacturer); 2508 if (p2p->cfg->manufacturer == NULL) 2509 return -1; 2510 } 2511 2512 return 0; 2513} 2514 2515 2516int p2p_set_model_name(struct p2p_data *p2p, const char *model_name) 2517{ 2518 os_free(p2p->cfg->model_name); 2519 p2p->cfg->model_name = NULL; 2520 if (model_name) { 2521 p2p->cfg->model_name = os_strdup(model_name); 2522 if (p2p->cfg->model_name == NULL) 2523 return -1; 2524 } 2525 2526 return 0; 2527} 2528 2529 2530int p2p_set_model_number(struct p2p_data *p2p, const char *model_number) 2531{ 2532 os_free(p2p->cfg->model_number); 2533 p2p->cfg->model_number = NULL; 2534 if (model_number) { 2535 p2p->cfg->model_number = os_strdup(model_number); 2536 if (p2p->cfg->model_number == NULL) 2537 return -1; 2538 } 2539 2540 return 0; 2541} 2542 2543 2544int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number) 2545{ 2546 os_free(p2p->cfg->serial_number); 2547 p2p->cfg->serial_number = NULL; 2548 if (serial_number) { 2549 p2p->cfg->serial_number = os_strdup(serial_number); 2550 if (p2p->cfg->serial_number == NULL) 2551 return -1; 2552 } 2553 2554 return 0; 2555} 2556 2557 2558void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods) 2559{ 2560 p2p->cfg->config_methods = config_methods; 2561} 2562 2563 2564void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid) 2565{ 2566 os_memcpy(p2p->cfg->uuid, uuid, 16); 2567} 2568 2569 2570int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type) 2571{ 2572 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8); 2573 return 0; 2574} 2575 2576 2577int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8], 2578 size_t num_dev_types) 2579{ 2580 if (num_dev_types > P2P_SEC_DEVICE_TYPES) 2581 num_dev_types = P2P_SEC_DEVICE_TYPES; 2582 p2p->cfg->num_sec_dev_types = num_dev_types; 2583 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8); 2584 return 0; 2585} 2586 2587 2588void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p) 2589{ 2590 int i; 2591 2592 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2593 wpabuf_free(p2p->wps_vendor_ext[i]); 2594 p2p->wps_vendor_ext[i] = NULL; 2595 } 2596} 2597 2598 2599int p2p_add_wps_vendor_extension(struct p2p_data *p2p, 2600 const struct wpabuf *vendor_ext) 2601{ 2602 int i; 2603 2604 if (vendor_ext == NULL) 2605 return -1; 2606 2607 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2608 if (p2p->wps_vendor_ext[i] == NULL) 2609 break; 2610 } 2611 if (i >= P2P_MAX_WPS_VENDOR_EXT) 2612 return -1; 2613 2614 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext); 2615 if (p2p->wps_vendor_ext[i] == NULL) 2616 return -1; 2617 2618 return 0; 2619} 2620 2621 2622int p2p_set_country(struct p2p_data *p2p, const char *country) 2623{ 2624 os_memcpy(p2p->cfg->country, country, 3); 2625 return 0; 2626} 2627 2628 2629void p2p_continue_find(struct p2p_data *p2p) 2630{ 2631 struct p2p_device *dev; 2632 p2p_set_state(p2p, P2P_SEARCH); 2633 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2634 if (dev->sd_pending_bcast_queries == 0) { 2635 /* Initialize with total number of registered broadcast 2636 * SD queries. */ 2637 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries; 2638 } 2639 2640 if (p2p_start_sd(p2p, dev) == 0) 2641 return; 2642 if (dev->req_config_methods && 2643 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) { 2644 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 2645 MACSTR " (config methods 0x%x)", 2646 MAC2STR(dev->info.p2p_device_addr), 2647 dev->req_config_methods); 2648 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0) 2649 return; 2650 } 2651 } 2652 2653 p2p_listen_in_find(p2p, 1); 2654} 2655 2656 2657static void p2p_sd_cb(struct p2p_data *p2p, int success) 2658{ 2659 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d", 2660 success); 2661 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2662 2663 if (!success) { 2664 p2p->sd_peer = NULL; 2665 p2p_continue_find(p2p); 2666 return; 2667 } 2668 2669 if (p2p->sd_peer == NULL) { 2670 p2p_dbg(p2p, "No SD peer entry known"); 2671 p2p_continue_find(p2p); 2672 return; 2673 } 2674 2675 /* Wait for response from the peer */ 2676 p2p_set_state(p2p, P2P_SD_DURING_FIND); 2677 p2p_set_timeout(p2p, 0, 200000); 2678} 2679 2680 2681/** 2682 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state 2683 * @p2p: P2P module context from p2p_init() 2684 */ 2685static void p2p_retry_pd(struct p2p_data *p2p) 2686{ 2687 struct p2p_device *dev; 2688 2689 if (p2p->state != P2P_IDLE) 2690 return; 2691 2692 /* 2693 * Retry the prov disc req attempt only for the peer that the user had 2694 * requested. 2695 */ 2696 2697 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2698 if (os_memcmp(p2p->pending_pd_devaddr, 2699 dev->info.p2p_device_addr, ETH_ALEN) != 0) 2700 continue; 2701 if (!dev->req_config_methods) 2702 continue; 2703 2704 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 2705 MACSTR " (config methods 0x%x)", 2706 MAC2STR(dev->info.p2p_device_addr), 2707 dev->req_config_methods); 2708 p2p_send_prov_disc_req(p2p, dev, 2709 dev->flags & P2P_DEV_PD_FOR_JOIN, 2710 p2p->pd_force_freq); 2711 return; 2712 } 2713} 2714 2715 2716static void p2p_prov_disc_cb(struct p2p_data *p2p, int success) 2717{ 2718 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d", 2719 success); 2720 2721 /* 2722 * Postpone resetting the pending action state till after we actually 2723 * time out. This allows us to take some action like notifying any 2724 * interested parties about no response to the request. 2725 * 2726 * When the timer (below) goes off we check in IDLE, SEARCH, or 2727 * LISTEN_ONLY state, which are the only allowed states to issue a PD 2728 * requests in, if this was still pending and then raise notification. 2729 */ 2730 2731 if (!success) { 2732 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2733 2734 if (p2p->user_initiated_pd && 2735 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY)) 2736 { 2737 /* Retry request from timeout to avoid busy loops */ 2738 p2p->pending_action_state = P2P_PENDING_PD; 2739 p2p_set_timeout(p2p, 0, 50000); 2740 } else if (p2p->state != P2P_IDLE) 2741 p2p_continue_find(p2p); 2742 else if (p2p->user_initiated_pd) { 2743 p2p->pending_action_state = P2P_PENDING_PD; 2744 p2p_set_timeout(p2p, 0, 300000); 2745 } 2746 return; 2747 } 2748 2749 /* 2750 * This postponing, of resetting pending_action_state, needs to be 2751 * done only for user initiated PD requests and not internal ones. 2752 */ 2753 if (p2p->user_initiated_pd) 2754 p2p->pending_action_state = P2P_PENDING_PD; 2755 else 2756 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2757 2758 /* Wait for response from the peer */ 2759 if (p2p->state == P2P_SEARCH) 2760 p2p_set_state(p2p, P2P_PD_DURING_FIND); 2761 p2p_set_timeout(p2p, 0, 200000); 2762} 2763 2764 2765int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq, 2766 struct os_reltime *rx_time, int level, const u8 *ies, 2767 size_t ies_len) 2768{ 2769 if (os_reltime_before(rx_time, &p2p->find_start)) { 2770 /* 2771 * The driver may have cached (e.g., in cfg80211 BSS table) the 2772 * scan results for relatively long time. To avoid reporting 2773 * stale information, update P2P peers only based on results 2774 * that have based on frames received after the last p2p_find 2775 * operation was started. 2776 */ 2777 p2p_dbg(p2p, "Ignore old scan result for " MACSTR 2778 " (rx_time=%u.%06u)", 2779 MAC2STR(bssid), (unsigned int) rx_time->sec, 2780 (unsigned int) rx_time->usec); 2781 return 0; 2782 } 2783 2784 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1); 2785 2786 return 0; 2787} 2788 2789 2790void p2p_scan_res_handled(struct p2p_data *p2p) 2791{ 2792 if (!p2p->p2p_scan_running) { 2793 p2p_dbg(p2p, "p2p_scan was not running, but scan results received"); 2794 } 2795 p2p->p2p_scan_running = 0; 2796 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2797 2798 if (p2p_run_after_scan(p2p)) 2799 return; 2800 if (p2p->state == P2P_SEARCH) 2801 p2p_continue_find(p2p); 2802} 2803 2804 2805void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id) 2806{ 2807 u8 *len; 2808 2809#ifdef CONFIG_WIFI_DISPLAY 2810 if (p2p->wfd_ie_probe_req) 2811 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req); 2812#endif /* CONFIG_WIFI_DISPLAY */ 2813 2814 len = p2p_buf_add_ie_hdr(ies); 2815 p2p_buf_add_capability(ies, p2p->dev_capab & 2816 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2817 if (dev_id) 2818 p2p_buf_add_device_id(ies, dev_id); 2819 if (p2p->cfg->reg_class && p2p->cfg->channel) 2820 p2p_buf_add_listen_channel(ies, p2p->cfg->country, 2821 p2p->cfg->reg_class, 2822 p2p->cfg->channel); 2823 if (p2p->ext_listen_interval) 2824 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period, 2825 p2p->ext_listen_interval); 2826 /* TODO: p2p_buf_add_operating_channel() if GO */ 2827 p2p_buf_update_ie_hdr(ies, len); 2828} 2829 2830 2831size_t p2p_scan_ie_buf_len(struct p2p_data *p2p) 2832{ 2833 size_t len = 100; 2834 2835#ifdef CONFIG_WIFI_DISPLAY 2836 if (p2p && p2p->wfd_ie_probe_req) 2837 len += wpabuf_len(p2p->wfd_ie_probe_req); 2838#endif /* CONFIG_WIFI_DISPLAY */ 2839 2840 return len; 2841} 2842 2843 2844int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end) 2845{ 2846 return p2p_attr_text(p2p_ie, buf, end); 2847} 2848 2849 2850static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success) 2851{ 2852 struct p2p_device *dev = p2p->go_neg_peer; 2853 int timeout; 2854 2855 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success); 2856 2857 if (dev == NULL) { 2858 p2p_dbg(p2p, "No pending GO Negotiation"); 2859 return; 2860 } 2861 2862 if (success) { 2863 if (dev->flags & P2P_DEV_USER_REJECTED) { 2864 p2p_set_state(p2p, P2P_IDLE); 2865 return; 2866 } 2867 } else if (dev->go_neg_req_sent) { 2868 /* Cancel the increment from p2p_connect_send() on failure */ 2869 dev->go_neg_req_sent--; 2870 } 2871 2872 if (!success && 2873 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) && 2874 !is_zero_ether_addr(dev->member_in_go_dev)) { 2875 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO", 2876 MAC2STR(dev->info.p2p_device_addr)); 2877 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 2878 p2p_send_dev_disc_req(p2p, dev); 2879 return; 2880 } 2881 2882 /* 2883 * Use P2P find, if needed, to find the other device from its listen 2884 * channel. 2885 */ 2886 p2p_set_state(p2p, P2P_CONNECT); 2887 timeout = success ? 500000 : 100000; 2888 if (!success && p2p->go_neg_peer && 2889 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) { 2890 unsigned int r; 2891 /* 2892 * Peer is expected to wait our response and we will skip the 2893 * listen phase. Add some randomness to the wait time here to 2894 * make it less likely to hit cases where we could end up in 2895 * sync with peer not listening. 2896 */ 2897 os_get_random((u8 *) &r, sizeof(r)); 2898 timeout += r % 100000; 2899 } 2900 p2p_set_timeout(p2p, 0, timeout); 2901} 2902 2903 2904static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success) 2905{ 2906 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d", 2907 success); 2908 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) { 2909 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore"); 2910 return; 2911 } 2912 p2p_set_state(p2p, P2P_CONNECT); 2913 p2p_set_timeout(p2p, 0, 500000); 2914} 2915 2916 2917static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success, 2918 const u8 *addr) 2919{ 2920 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success); 2921 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) { 2922 p2p_go_neg_failed(p2p, p2p->go_neg_peer, 2923 p2p->go_neg_peer->status); 2924 } else if (success) { 2925 struct p2p_device *dev; 2926 dev = p2p_get_device(p2p, addr); 2927 if (dev && 2928 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) 2929 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE; 2930 } 2931} 2932 2933 2934static void p2p_go_neg_conf_cb(struct p2p_data *p2p, 2935 enum p2p_send_action_result result) 2936{ 2937 struct p2p_device *dev; 2938 2939 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result); 2940 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 2941 if (result == P2P_SEND_ACTION_FAILED) { 2942 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 2943 return; 2944 } 2945 if (result == P2P_SEND_ACTION_NO_ACK) { 2946 /* 2947 * It looks like the TX status for GO Negotiation Confirm is 2948 * often showing failure even when the peer has actually 2949 * received the frame. Since the peer may change channels 2950 * immediately after having received the frame, we may not see 2951 * an Ack for retries, so just dropping a single frame may 2952 * trigger this. To allow the group formation to succeed if the 2953 * peer did indeed receive the frame, continue regardless of 2954 * the TX status. 2955 */ 2956 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported"); 2957 } 2958 2959 dev = p2p->go_neg_peer; 2960 if (dev == NULL) 2961 return; 2962 2963 p2p_go_complete(p2p, dev); 2964} 2965 2966 2967void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 2968 const u8 *src, const u8 *bssid, 2969 enum p2p_send_action_result result) 2970{ 2971 enum p2p_pending_action_state state; 2972 int success; 2973 2974 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR 2975 " src=" MACSTR " bssid=" MACSTR " result=%d", 2976 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), 2977 MAC2STR(bssid), result); 2978 success = result == P2P_SEND_ACTION_SUCCESS; 2979 state = p2p->pending_action_state; 2980 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2981 switch (state) { 2982 case P2P_NO_PENDING_ACTION: 2983 if (p2p->send_action_in_progress) { 2984 p2p->send_action_in_progress = 0; 2985 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 2986 } 2987 if (p2p->after_scan_tx_in_progress) { 2988 p2p->after_scan_tx_in_progress = 0; 2989 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING && 2990 p2p_run_after_scan(p2p)) 2991 break; 2992 if (p2p->state == P2P_SEARCH) { 2993 p2p_dbg(p2p, "Continue find after after_scan_tx completion"); 2994 p2p_continue_find(p2p); 2995 } 2996 } 2997 break; 2998 case P2P_PENDING_GO_NEG_REQUEST: 2999 p2p_go_neg_req_cb(p2p, success); 3000 break; 3001 case P2P_PENDING_GO_NEG_RESPONSE: 3002 p2p_go_neg_resp_cb(p2p, success); 3003 break; 3004 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE: 3005 p2p_go_neg_resp_failure_cb(p2p, success, dst); 3006 break; 3007 case P2P_PENDING_GO_NEG_CONFIRM: 3008 p2p_go_neg_conf_cb(p2p, result); 3009 break; 3010 case P2P_PENDING_SD: 3011 p2p_sd_cb(p2p, success); 3012 break; 3013 case P2P_PENDING_PD: 3014 p2p_prov_disc_cb(p2p, success); 3015 break; 3016 case P2P_PENDING_INVITATION_REQUEST: 3017 p2p_invitation_req_cb(p2p, success); 3018 break; 3019 case P2P_PENDING_INVITATION_RESPONSE: 3020 p2p_invitation_resp_cb(p2p, success); 3021 break; 3022 case P2P_PENDING_DEV_DISC_REQUEST: 3023 p2p_dev_disc_req_cb(p2p, success); 3024 break; 3025 case P2P_PENDING_DEV_DISC_RESPONSE: 3026 p2p_dev_disc_resp_cb(p2p, success); 3027 break; 3028 case P2P_PENDING_GO_DISC_REQ: 3029 p2p_go_disc_req_cb(p2p, success); 3030 break; 3031 } 3032 3033 p2p->after_scan_tx_in_progress = 0; 3034} 3035 3036 3037void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq, 3038 unsigned int duration) 3039{ 3040 if (freq == p2p->pending_client_disc_freq) { 3041 p2p_dbg(p2p, "Client discoverability remain-awake completed"); 3042 p2p->pending_client_disc_freq = 0; 3043 return; 3044 } 3045 3046 if (freq != p2p->pending_listen_freq) { 3047 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)", 3048 freq, duration, p2p->pending_listen_freq); 3049 return; 3050 } 3051 3052 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback", 3053 p2p->pending_listen_sec, p2p->pending_listen_usec, 3054 p2p->pending_listen_freq); 3055 p2p->in_listen = 1; 3056 p2p->drv_in_listen = freq; 3057 if (p2p->pending_listen_sec || p2p->pending_listen_usec) { 3058 /* 3059 * Add 20 msec extra wait to avoid race condition with driver 3060 * remain-on-channel end event, i.e., give driver more time to 3061 * complete the operation before our timeout expires. 3062 */ 3063 p2p_set_timeout(p2p, p2p->pending_listen_sec, 3064 p2p->pending_listen_usec + 20000); 3065 } 3066 3067 p2p->pending_listen_freq = 0; 3068} 3069 3070 3071int p2p_listen_end(struct p2p_data *p2p, unsigned int freq) 3072{ 3073 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq); 3074 p2p->drv_in_listen = 0; 3075 if (p2p->in_listen) 3076 return 0; /* Internal timeout will trigger the next step */ 3077 3078 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) { 3079 if (p2p->go_neg_peer->connect_reqs >= 120) { 3080 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3081 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3082 return 0; 3083 } 3084 3085 p2p_set_state(p2p, P2P_CONNECT); 3086 p2p_connect_send(p2p, p2p->go_neg_peer); 3087 return 1; 3088 } else if (p2p->state == P2P_SEARCH) { 3089 if (p2p->p2p_scan_running) { 3090 /* 3091 * Search is already in progress. This can happen if 3092 * an Action frame RX is reported immediately after 3093 * the end of a remain-on-channel operation and the 3094 * response frame to that is sent using an offchannel 3095 * operation while in p2p_find. Avoid an attempt to 3096 * restart a scan here. 3097 */ 3098 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one"); 3099 return 1; 3100 } 3101 if (p2p->pending_listen_freq) { 3102 /* 3103 * Better wait a bit if the driver is unable to start 3104 * offchannel operation for some reason. p2p_search() 3105 * will be started from internal timeout. 3106 */ 3107 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop"); 3108 p2p_set_timeout(p2p, 0, 100000); 3109 return 1; 3110 } 3111 if (p2p->search_delay) { 3112 p2p_dbg(p2p, "Delay search operation by %u ms", 3113 p2p->search_delay); 3114 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3115 (p2p->search_delay % 1000) * 1000); 3116 return 1; 3117 } 3118 p2p_search(p2p); 3119 return 1; 3120 } 3121 3122 return 0; 3123} 3124 3125 3126static void p2p_timeout_connect(struct p2p_data *p2p) 3127{ 3128 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3129 if (p2p->go_neg_peer && 3130 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 3131 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed"); 3132 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3133 return; 3134 } 3135 if (p2p->go_neg_peer && 3136 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) && 3137 p2p->go_neg_peer->connect_reqs < 120) { 3138 p2p_dbg(p2p, "Peer expected to wait our response - skip listen"); 3139 p2p_connect_send(p2p, p2p->go_neg_peer); 3140 return; 3141 } 3142 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) { 3143 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)"); 3144 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3145 p2p_set_timeout(p2p, 0, 30000); 3146 return; 3147 } 3148 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3149 p2p_listen_in_find(p2p, 0); 3150} 3151 3152 3153static void p2p_timeout_connect_listen(struct p2p_data *p2p) 3154{ 3155 if (p2p->go_neg_peer) { 3156 if (p2p->drv_in_listen) { 3157 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete"); 3158 return; 3159 } 3160 3161 if (p2p->go_neg_peer->connect_reqs >= 120) { 3162 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3163 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3164 return; 3165 } 3166 3167 p2p_set_state(p2p, P2P_CONNECT); 3168 p2p_connect_send(p2p, p2p->go_neg_peer); 3169 } else 3170 p2p_set_state(p2p, P2P_IDLE); 3171} 3172 3173 3174static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p) 3175{ 3176 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 3177 3178 if (p2p->cfg->is_concurrent_session_active && 3179 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx)) 3180 p2p_set_timeout(p2p, 0, 500000); 3181 else 3182 p2p_set_timeout(p2p, 0, 200000); 3183} 3184 3185 3186static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p) 3187{ 3188 struct p2p_device *dev = p2p->go_neg_peer; 3189 3190 if (dev == NULL) { 3191 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait"); 3192 return; 3193 } 3194 3195 dev->wait_count++; 3196 if (dev->wait_count >= 120) { 3197 p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation"); 3198 p2p_go_neg_failed(p2p, dev, -1); 3199 return; 3200 } 3201 3202 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation"); 3203 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT); 3204 p2p_listen_in_find(p2p, 0); 3205} 3206 3207 3208static void p2p_timeout_sd_during_find(struct p2p_data *p2p) 3209{ 3210 p2p_dbg(p2p, "Service Discovery Query timeout"); 3211 if (p2p->sd_peer) { 3212 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3213 p2p->sd_peer = NULL; 3214 } 3215 p2p_continue_find(p2p); 3216} 3217 3218 3219static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p) 3220{ 3221 p2p_dbg(p2p, "Provision Discovery Request timeout"); 3222 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3223 p2p_continue_find(p2p); 3224} 3225 3226 3227static void p2p_timeout_prov_disc_req(struct p2p_data *p2p) 3228{ 3229 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3230 3231 /* 3232 * For user initiated PD requests that we have not gotten any responses 3233 * for while in IDLE state, we retry them a couple of times before 3234 * giving up. 3235 */ 3236 if (!p2p->user_initiated_pd) 3237 return; 3238 3239 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout"); 3240 3241 if (p2p->pd_retries) { 3242 p2p->pd_retries--; 3243 p2p_retry_pd(p2p); 3244 } else { 3245 struct p2p_device *dev; 3246 int for_join = 0; 3247 3248 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3249 if (os_memcmp(p2p->pending_pd_devaddr, 3250 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3251 continue; 3252 if (dev->req_config_methods && 3253 (dev->flags & P2P_DEV_PD_FOR_JOIN)) 3254 for_join = 1; 3255 } 3256 3257 if (p2p->cfg->prov_disc_fail) 3258 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, 3259 p2p->pending_pd_devaddr, 3260 for_join ? 3261 P2P_PROV_DISC_TIMEOUT_JOIN : 3262 P2P_PROV_DISC_TIMEOUT); 3263 p2p_reset_pending_pd(p2p); 3264 } 3265} 3266 3267 3268static void p2p_timeout_invite(struct p2p_data *p2p) 3269{ 3270 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3271 p2p_set_state(p2p, P2P_INVITE_LISTEN); 3272 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 3273 /* 3274 * Better remain on operating channel instead of listen channel 3275 * when running a group. 3276 */ 3277 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel"); 3278 p2p_set_timeout(p2p, 0, 100000); 3279 return; 3280 } 3281 p2p_listen_in_find(p2p, 0); 3282} 3283 3284 3285static void p2p_timeout_invite_listen(struct p2p_data *p2p) 3286{ 3287 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) { 3288 p2p_set_state(p2p, P2P_INVITE); 3289 p2p_invite_send(p2p, p2p->invite_peer, 3290 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id); 3291 } else { 3292 if (p2p->invite_peer) { 3293 p2p_dbg(p2p, "Invitation Request retry limit reached"); 3294 if (p2p->cfg->invitation_result) 3295 p2p->cfg->invitation_result( 3296 p2p->cfg->cb_ctx, -1, NULL, NULL, 3297 p2p->invite_peer->info.p2p_device_addr, 3298 0); 3299 } 3300 p2p_set_state(p2p, P2P_IDLE); 3301 } 3302} 3303 3304 3305static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx) 3306{ 3307 struct p2p_data *p2p = eloop_ctx; 3308 3309 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state)); 3310 3311 p2p->in_listen = 0; 3312 3313 switch (p2p->state) { 3314 case P2P_IDLE: 3315 /* Check if we timed out waiting for PD req */ 3316 if (p2p->pending_action_state == P2P_PENDING_PD) 3317 p2p_timeout_prov_disc_req(p2p); 3318 break; 3319 case P2P_SEARCH: 3320 /* Check if we timed out waiting for PD req */ 3321 if (p2p->pending_action_state == P2P_PENDING_PD) 3322 p2p_timeout_prov_disc_req(p2p); 3323 if (p2p->search_delay && !p2p->in_search_delay) { 3324 p2p_dbg(p2p, "Delay search operation by %u ms", 3325 p2p->search_delay); 3326 p2p->in_search_delay = 1; 3327 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3328 (p2p->search_delay % 1000) * 1000); 3329 break; 3330 } 3331 p2p->in_search_delay = 0; 3332 p2p_search(p2p); 3333 break; 3334 case P2P_CONNECT: 3335 p2p_timeout_connect(p2p); 3336 break; 3337 case P2P_CONNECT_LISTEN: 3338 p2p_timeout_connect_listen(p2p); 3339 break; 3340 case P2P_GO_NEG: 3341 break; 3342 case P2P_LISTEN_ONLY: 3343 /* Check if we timed out waiting for PD req */ 3344 if (p2p->pending_action_state == P2P_PENDING_PD) 3345 p2p_timeout_prov_disc_req(p2p); 3346 3347 if (p2p->ext_listen_only) { 3348 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed"); 3349 p2p->ext_listen_only = 0; 3350 p2p_set_state(p2p, P2P_IDLE); 3351 } 3352 break; 3353 case P2P_WAIT_PEER_CONNECT: 3354 p2p_timeout_wait_peer_connect(p2p); 3355 break; 3356 case P2P_WAIT_PEER_IDLE: 3357 p2p_timeout_wait_peer_idle(p2p); 3358 break; 3359 case P2P_SD_DURING_FIND: 3360 p2p_timeout_sd_during_find(p2p); 3361 break; 3362 case P2P_PROVISIONING: 3363 break; 3364 case P2P_PD_DURING_FIND: 3365 p2p_timeout_prov_disc_during_find(p2p); 3366 break; 3367 case P2P_INVITE: 3368 p2p_timeout_invite(p2p); 3369 break; 3370 case P2P_INVITE_LISTEN: 3371 p2p_timeout_invite_listen(p2p); 3372 break; 3373 } 3374} 3375 3376 3377int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr) 3378{ 3379 struct p2p_device *dev; 3380 3381 dev = p2p_get_device(p2p, peer_addr); 3382 p2p_dbg(p2p, "Local request to reject connection attempts by peer " 3383 MACSTR, MAC2STR(peer_addr)); 3384 if (dev == NULL) { 3385 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr)); 3386 return -1; 3387 } 3388 dev->status = P2P_SC_FAIL_REJECTED_BY_USER; 3389 dev->flags |= P2P_DEV_USER_REJECTED; 3390 return 0; 3391} 3392 3393 3394const char * p2p_wps_method_text(enum p2p_wps_method method) 3395{ 3396 switch (method) { 3397 case WPS_NOT_READY: 3398 return "not-ready"; 3399 case WPS_PIN_DISPLAY: 3400 return "Display"; 3401 case WPS_PIN_KEYPAD: 3402 return "Keypad"; 3403 case WPS_PBC: 3404 return "PBC"; 3405 case WPS_NFC: 3406 return "NFC"; 3407 } 3408 3409 return "??"; 3410} 3411 3412 3413static const char * p2p_go_state_text(enum p2p_go_state go_state) 3414{ 3415 switch (go_state) { 3416 case UNKNOWN_GO: 3417 return "unknown"; 3418 case LOCAL_GO: 3419 return "local"; 3420 case REMOTE_GO: 3421 return "remote"; 3422 } 3423 3424 return "??"; 3425} 3426 3427 3428const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p, 3429 const u8 *addr, int next) 3430{ 3431 struct p2p_device *dev; 3432 3433 if (addr) 3434 dev = p2p_get_device(p2p, addr); 3435 else 3436 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 3437 3438 if (dev && next) { 3439 dev = dl_list_first(&dev->list, struct p2p_device, list); 3440 if (&dev->list == &p2p->devices) 3441 dev = NULL; 3442 } 3443 3444 if (dev == NULL) 3445 return NULL; 3446 3447 return &dev->info; 3448} 3449 3450 3451int p2p_get_peer_info_txt(const struct p2p_peer_info *info, 3452 char *buf, size_t buflen) 3453{ 3454 struct p2p_device *dev; 3455 int res; 3456 char *pos, *end; 3457 struct os_reltime now; 3458 3459 if (info == NULL) 3460 return -1; 3461 3462 dev = (struct p2p_device *) (((u8 *) info) - 3463 offsetof(struct p2p_device, info)); 3464 3465 pos = buf; 3466 end = buf + buflen; 3467 3468 os_get_reltime(&now); 3469 res = os_snprintf(pos, end - pos, 3470 "age=%d\n" 3471 "listen_freq=%d\n" 3472 "wps_method=%s\n" 3473 "interface_addr=" MACSTR "\n" 3474 "member_in_go_dev=" MACSTR "\n" 3475 "member_in_go_iface=" MACSTR "\n" 3476 "go_neg_req_sent=%d\n" 3477 "go_state=%s\n" 3478 "dialog_token=%u\n" 3479 "intended_addr=" MACSTR "\n" 3480 "country=%c%c\n" 3481 "oper_freq=%d\n" 3482 "req_config_methods=0x%x\n" 3483 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n" 3484 "status=%d\n" 3485 "wait_count=%u\n" 3486 "invitation_reqs=%u\n", 3487 (int) (now.sec - dev->last_seen.sec), 3488 dev->listen_freq, 3489 p2p_wps_method_text(dev->wps_method), 3490 MAC2STR(dev->interface_addr), 3491 MAC2STR(dev->member_in_go_dev), 3492 MAC2STR(dev->member_in_go_iface), 3493 dev->go_neg_req_sent, 3494 p2p_go_state_text(dev->go_state), 3495 dev->dialog_token, 3496 MAC2STR(dev->intended_addr), 3497 dev->country[0] ? dev->country[0] : '_', 3498 dev->country[1] ? dev->country[1] : '_', 3499 dev->oper_freq, 3500 dev->req_config_methods, 3501 dev->flags & P2P_DEV_PROBE_REQ_ONLY ? 3502 "[PROBE_REQ_ONLY]" : "", 3503 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "", 3504 dev->flags & P2P_DEV_NOT_YET_READY ? 3505 "[NOT_YET_READY]" : "", 3506 dev->flags & P2P_DEV_PD_PEER_DISPLAY ? 3507 "[PD_PEER_DISPLAY]" : "", 3508 dev->flags & P2P_DEV_PD_PEER_KEYPAD ? 3509 "[PD_PEER_KEYPAD]" : "", 3510 dev->flags & P2P_DEV_USER_REJECTED ? 3511 "[USER_REJECTED]" : "", 3512 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ? 3513 "[PEER_WAITING_RESPONSE]" : "", 3514 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ? 3515 "[PREFER_PERSISTENT_GROUP]" : "", 3516 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ? 3517 "[WAIT_GO_NEG_RESPONSE]" : "", 3518 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ? 3519 "[WAIT_GO_NEG_CONFIRM]" : "", 3520 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ? 3521 "[GROUP_CLIENT_ONLY]" : "", 3522 dev->flags & P2P_DEV_FORCE_FREQ ? 3523 "[FORCE_FREQ]" : "", 3524 dev->flags & P2P_DEV_PD_FOR_JOIN ? 3525 "[PD_FOR_JOIN]" : "", 3526 dev->status, 3527 dev->wait_count, 3528 dev->invitation_reqs); 3529 if (res < 0 || res >= end - pos) 3530 return pos - buf; 3531 pos += res; 3532 3533 if (dev->ext_listen_period) { 3534 res = os_snprintf(pos, end - pos, 3535 "ext_listen_period=%u\n" 3536 "ext_listen_interval=%u\n", 3537 dev->ext_listen_period, 3538 dev->ext_listen_interval); 3539 if (res < 0 || res >= end - pos) 3540 return pos - buf; 3541 pos += res; 3542 } 3543 3544 if (dev->oper_ssid_len) { 3545 res = os_snprintf(pos, end - pos, 3546 "oper_ssid=%s\n", 3547 wpa_ssid_txt(dev->oper_ssid, 3548 dev->oper_ssid_len)); 3549 if (res < 0 || res >= end - pos) 3550 return pos - buf; 3551 pos += res; 3552 } 3553 3554#ifdef CONFIG_WIFI_DISPLAY 3555 if (dev->info.wfd_subelems) { 3556 res = os_snprintf(pos, end - pos, "wfd_subelems="); 3557 if (res < 0 || res >= end - pos) 3558 return pos - buf; 3559 pos += res; 3560 3561 pos += wpa_snprintf_hex(pos, end - pos, 3562 wpabuf_head(dev->info.wfd_subelems), 3563 wpabuf_len(dev->info.wfd_subelems)); 3564 3565 res = os_snprintf(pos, end - pos, "\n"); 3566 if (res < 0 || res >= end - pos) 3567 return pos - buf; 3568 pos += res; 3569 } 3570#endif /* CONFIG_WIFI_DISPLAY */ 3571 3572 return pos - buf; 3573} 3574 3575 3576int p2p_peer_known(struct p2p_data *p2p, const u8 *addr) 3577{ 3578 return p2p_get_device(p2p, addr) != NULL; 3579} 3580 3581 3582void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled) 3583{ 3584 if (enabled) { 3585 p2p_dbg(p2p, "Client discoverability enabled"); 3586 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3587 } else { 3588 p2p_dbg(p2p, "Client discoverability disabled"); 3589 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3590 } 3591} 3592 3593 3594static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1, 3595 u32 duration2, u32 interval2) 3596{ 3597 struct wpabuf *req; 3598 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL; 3599 u8 *len; 3600 3601 req = wpabuf_alloc(100); 3602 if (req == NULL) 3603 return NULL; 3604 3605 if (duration1 || interval1) { 3606 os_memset(&desc1, 0, sizeof(desc1)); 3607 desc1.count_type = 1; 3608 desc1.duration = duration1; 3609 desc1.interval = interval1; 3610 ptr1 = &desc1; 3611 3612 if (duration2 || interval2) { 3613 os_memset(&desc2, 0, sizeof(desc2)); 3614 desc2.count_type = 2; 3615 desc2.duration = duration2; 3616 desc2.interval = interval2; 3617 ptr2 = &desc2; 3618 } 3619 } 3620 3621 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1); 3622 len = p2p_buf_add_ie_hdr(req); 3623 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2); 3624 p2p_buf_update_ie_hdr(req, len); 3625 3626 return req; 3627} 3628 3629 3630int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr, 3631 const u8 *own_interface_addr, unsigned int freq, 3632 u32 duration1, u32 interval1, u32 duration2, 3633 u32 interval2) 3634{ 3635 struct wpabuf *req; 3636 3637 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR 3638 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u " 3639 "dur2=%u int2=%u", 3640 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr), 3641 freq, duration1, interval1, duration2, interval2); 3642 3643 req = p2p_build_presence_req(duration1, interval1, duration2, 3644 interval2); 3645 if (req == NULL) 3646 return -1; 3647 3648 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3649 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr, 3650 go_interface_addr, 3651 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 3652 p2p_dbg(p2p, "Failed to send Action frame"); 3653 } 3654 wpabuf_free(req); 3655 3656 return 0; 3657} 3658 3659 3660static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa, 3661 size_t noa_len, u8 dialog_token) 3662{ 3663 struct wpabuf *resp; 3664 u8 *len; 3665 3666 resp = wpabuf_alloc(100 + noa_len); 3667 if (resp == NULL) 3668 return NULL; 3669 3670 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token); 3671 len = p2p_buf_add_ie_hdr(resp); 3672 p2p_buf_add_status(resp, status); 3673 if (noa) { 3674 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE); 3675 wpabuf_put_le16(resp, noa_len); 3676 wpabuf_put_data(resp, noa, noa_len); 3677 } else 3678 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL); 3679 p2p_buf_update_ie_hdr(resp, len); 3680 3681 return resp; 3682} 3683 3684 3685static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 3686 const u8 *sa, const u8 *data, size_t len, 3687 int rx_freq) 3688{ 3689 struct p2p_message msg; 3690 u8 status; 3691 struct wpabuf *resp; 3692 size_t g; 3693 struct p2p_group *group = NULL; 3694 int parsed = 0; 3695 u8 noa[50]; 3696 int noa_len; 3697 3698 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request"); 3699 3700 for (g = 0; g < p2p->num_groups; g++) { 3701 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]), 3702 ETH_ALEN) == 0) { 3703 group = p2p->groups[g]; 3704 break; 3705 } 3706 } 3707 if (group == NULL) { 3708 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group " 3709 MACSTR, MAC2STR(da)); 3710 return; 3711 } 3712 3713 if (p2p_parse(data, len, &msg) < 0) { 3714 p2p_dbg(p2p, "Failed to parse P2P Presence Request"); 3715 status = P2P_SC_FAIL_INVALID_PARAMS; 3716 goto fail; 3717 } 3718 parsed = 1; 3719 3720 if (msg.noa == NULL) { 3721 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request"); 3722 status = P2P_SC_FAIL_INVALID_PARAMS; 3723 goto fail; 3724 } 3725 3726 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len); 3727 3728fail: 3729 if (p2p->cfg->get_noa) 3730 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa, 3731 sizeof(noa)); 3732 else 3733 noa_len = -1; 3734 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL, 3735 noa_len > 0 ? noa_len : 0, 3736 msg.dialog_token); 3737 if (parsed) 3738 p2p_parse_free(&msg); 3739 if (resp == NULL) 3740 return; 3741 3742 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3743 if (p2p_send_action(p2p, rx_freq, sa, da, da, 3744 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 3745 p2p_dbg(p2p, "Failed to send Action frame"); 3746 } 3747 wpabuf_free(resp); 3748} 3749 3750 3751static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 3752 const u8 *sa, const u8 *data, size_t len) 3753{ 3754 struct p2p_message msg; 3755 3756 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response"); 3757 3758 if (p2p_parse(data, len, &msg) < 0) { 3759 p2p_dbg(p2p, "Failed to parse P2P Presence Response"); 3760 return; 3761 } 3762 3763 if (msg.status == NULL || msg.noa == NULL) { 3764 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response"); 3765 p2p_parse_free(&msg); 3766 return; 3767 } 3768 3769 if (p2p->cfg->presence_resp) { 3770 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status, 3771 msg.noa, msg.noa_len); 3772 } 3773 3774 if (*msg.status) { 3775 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u", 3776 *msg.status); 3777 p2p_parse_free(&msg); 3778 return; 3779 } 3780 3781 p2p_dbg(p2p, "P2P Presence Request was accepted"); 3782 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA", 3783 msg.noa, msg.noa_len); 3784 /* TODO: process NoA */ 3785 p2p_parse_free(&msg); 3786} 3787 3788 3789static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx) 3790{ 3791 struct p2p_data *p2p = eloop_ctx; 3792 3793 if (p2p->ext_listen_interval) { 3794 /* Schedule next extended listen timeout */ 3795 eloop_register_timeout(p2p->ext_listen_interval_sec, 3796 p2p->ext_listen_interval_usec, 3797 p2p_ext_listen_timeout, p2p, NULL); 3798 } 3799 3800 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) { 3801 /* 3802 * This should not really happen, but it looks like the Listen 3803 * command may fail is something else (e.g., a scan) was 3804 * running at an inconvenient time. As a workaround, allow new 3805 * Extended Listen operation to be started. 3806 */ 3807 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again"); 3808 p2p->ext_listen_only = 0; 3809 p2p_set_state(p2p, P2P_IDLE); 3810 } 3811 3812 if (p2p->state != P2P_IDLE) { 3813 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state)); 3814 return; 3815 } 3816 3817 p2p_dbg(p2p, "Extended Listen timeout"); 3818 p2p->ext_listen_only = 1; 3819 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) { 3820 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing"); 3821 p2p->ext_listen_only = 0; 3822 } 3823} 3824 3825 3826int p2p_ext_listen(struct p2p_data *p2p, unsigned int period, 3827 unsigned int interval) 3828{ 3829 if (period > 65535 || interval > 65535 || period > interval || 3830 (period == 0 && interval > 0) || (period > 0 && interval == 0)) { 3831 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u", 3832 period, interval); 3833 return -1; 3834 } 3835 3836 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 3837 3838 if (interval == 0) { 3839 p2p_dbg(p2p, "Disabling Extended Listen Timing"); 3840 p2p->ext_listen_period = 0; 3841 p2p->ext_listen_interval = 0; 3842 return 0; 3843 } 3844 3845 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec", 3846 period, interval); 3847 p2p->ext_listen_period = period; 3848 p2p->ext_listen_interval = interval; 3849 p2p->ext_listen_interval_sec = interval / 1000; 3850 p2p->ext_listen_interval_usec = (interval % 1000) * 1000; 3851 3852 eloop_register_timeout(p2p->ext_listen_interval_sec, 3853 p2p->ext_listen_interval_usec, 3854 p2p_ext_listen_timeout, p2p, NULL); 3855 3856 return 0; 3857} 3858 3859 3860void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 3861 const u8 *ie, size_t ie_len) 3862{ 3863 struct p2p_message msg; 3864 3865 if (bssid == NULL || ie == NULL) 3866 return; 3867 3868 os_memset(&msg, 0, sizeof(msg)); 3869 if (p2p_parse_ies(ie, ie_len, &msg)) 3870 return; 3871 if (msg.minor_reason_code == NULL) { 3872 p2p_parse_free(&msg); 3873 return; 3874 } 3875 3876 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR 3877 " reason_code=%u minor_reason_code=%u", 3878 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 3879 3880 p2p_parse_free(&msg); 3881} 3882 3883 3884void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 3885 const u8 *ie, size_t ie_len) 3886{ 3887 struct p2p_message msg; 3888 3889 if (bssid == NULL || ie == NULL) 3890 return; 3891 3892 os_memset(&msg, 0, sizeof(msg)); 3893 if (p2p_parse_ies(ie, ie_len, &msg)) 3894 return; 3895 if (msg.minor_reason_code == NULL) { 3896 p2p_parse_free(&msg); 3897 return; 3898 } 3899 3900 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR 3901 " reason_code=%u minor_reason_code=%u", 3902 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 3903 3904 p2p_parse_free(&msg); 3905} 3906 3907 3908void p2p_set_managed_oper(struct p2p_data *p2p, int enabled) 3909{ 3910 if (enabled) { 3911 p2p_dbg(p2p, "Managed P2P Device operations enabled"); 3912 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED; 3913 } else { 3914 p2p_dbg(p2p, "Managed P2P Device operations disabled"); 3915 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED; 3916 } 3917} 3918 3919 3920int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel) 3921{ 3922 if (p2p_channel_to_freq(reg_class, channel) < 0) 3923 return -1; 3924 3925 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u", 3926 reg_class, channel); 3927 p2p->cfg->reg_class = reg_class; 3928 p2p->cfg->channel = channel; 3929 3930 return 0; 3931} 3932 3933 3934int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len) 3935{ 3936 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len)); 3937 if (postfix == NULL) { 3938 p2p->cfg->ssid_postfix_len = 0; 3939 return 0; 3940 } 3941 if (len > sizeof(p2p->cfg->ssid_postfix)) 3942 return -1; 3943 os_memcpy(p2p->cfg->ssid_postfix, postfix, len); 3944 p2p->cfg->ssid_postfix_len = len; 3945 return 0; 3946} 3947 3948 3949int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel, 3950 int cfg_op_channel) 3951{ 3952 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0) 3953 return -1; 3954 3955 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u", 3956 op_reg_class, op_channel); 3957 p2p->cfg->op_reg_class = op_reg_class; 3958 p2p->cfg->op_channel = op_channel; 3959 p2p->cfg->cfg_op_channel = cfg_op_channel; 3960 return 0; 3961} 3962 3963 3964int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan, 3965 const struct p2p_channel *pref_chan) 3966{ 3967 struct p2p_channel *n; 3968 3969 if (pref_chan) { 3970 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel)); 3971 if (n == NULL) 3972 return -1; 3973 os_memcpy(n, pref_chan, 3974 num_pref_chan * sizeof(struct p2p_channel)); 3975 } else 3976 n = NULL; 3977 3978 os_free(p2p->cfg->pref_chan); 3979 p2p->cfg->pref_chan = n; 3980 p2p->cfg->num_pref_chan = num_pref_chan; 3981 3982 return 0; 3983} 3984 3985 3986int p2p_set_no_go_freq(struct p2p_data *p2p, 3987 const struct wpa_freq_range_list *list) 3988{ 3989 struct wpa_freq_range *tmp; 3990 3991 if (list == NULL || list->num == 0) { 3992 os_free(p2p->no_go_freq.range); 3993 p2p->no_go_freq.range = NULL; 3994 p2p->no_go_freq.num = 0; 3995 return 0; 3996 } 3997 3998 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range)); 3999 if (tmp == NULL) 4000 return -1; 4001 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range)); 4002 os_free(p2p->no_go_freq.range); 4003 p2p->no_go_freq.range = tmp; 4004 p2p->no_go_freq.num = list->num; 4005 p2p_dbg(p2p, "Updated no GO chan list"); 4006 4007 return 0; 4008} 4009 4010 4011int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr, 4012 u8 *iface_addr) 4013{ 4014 struct p2p_device *dev = p2p_get_device(p2p, dev_addr); 4015 if (dev == NULL || is_zero_ether_addr(dev->interface_addr)) 4016 return -1; 4017 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN); 4018 return 0; 4019} 4020 4021 4022int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr, 4023 u8 *dev_addr) 4024{ 4025 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4026 if (dev == NULL) 4027 return -1; 4028 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN); 4029 return 0; 4030} 4031 4032 4033void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr) 4034{ 4035 os_memcpy(p2p->peer_filter, addr, ETH_ALEN); 4036 if (is_zero_ether_addr(p2p->peer_filter)) 4037 p2p_dbg(p2p, "Disable peer filter"); 4038 else 4039 p2p_dbg(p2p, "Enable peer filter for " MACSTR, 4040 MAC2STR(p2p->peer_filter)); 4041} 4042 4043 4044void p2p_set_cross_connect(struct p2p_data *p2p, int enabled) 4045{ 4046 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled"); 4047 if (p2p->cross_connect == enabled) 4048 return; 4049 p2p->cross_connect = enabled; 4050 /* TODO: may need to tear down any action group where we are GO(?) */ 4051} 4052 4053 4054int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr) 4055{ 4056 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4057 if (dev == NULL) 4058 return -1; 4059 if (dev->oper_freq <= 0) 4060 return -1; 4061 return dev->oper_freq; 4062} 4063 4064 4065void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled) 4066{ 4067 p2p_dbg(p2p, "Intra BSS distribution %s", 4068 enabled ? "enabled" : "disabled"); 4069 p2p->cfg->p2p_intra_bss = enabled; 4070} 4071 4072 4073void p2p_update_channel_list(struct p2p_data *p2p, 4074 const struct p2p_channels *chan, 4075 const struct p2p_channels *cli_chan) 4076{ 4077 p2p_dbg(p2p, "Update channel list"); 4078 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels)); 4079 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 4080 os_memcpy(&p2p->cfg->cli_channels, cli_chan, 4081 sizeof(struct p2p_channels)); 4082 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 4083} 4084 4085 4086int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 4087 const u8 *src, const u8 *bssid, const u8 *buf, 4088 size_t len, unsigned int wait_time) 4089{ 4090 if (p2p->p2p_scan_running) { 4091 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes"); 4092 if (p2p->after_scan_tx) { 4093 p2p_dbg(p2p, "Dropped previous pending Action frame TX"); 4094 os_free(p2p->after_scan_tx); 4095 } 4096 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) + 4097 len); 4098 if (p2p->after_scan_tx == NULL) 4099 return -1; 4100 p2p->after_scan_tx->freq = freq; 4101 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN); 4102 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN); 4103 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN); 4104 p2p->after_scan_tx->len = len; 4105 p2p->after_scan_tx->wait_time = wait_time; 4106 os_memcpy(p2p->after_scan_tx + 1, buf, len); 4107 return 0; 4108 } 4109 4110 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid, 4111 buf, len, wait_time); 4112} 4113 4114 4115void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5, 4116 int freq_overall) 4117{ 4118 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d", 4119 freq_24, freq_5, freq_overall); 4120 p2p->best_freq_24 = freq_24; 4121 p2p->best_freq_5 = freq_5; 4122 p2p->best_freq_overall = freq_overall; 4123} 4124 4125 4126void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq) 4127{ 4128 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq); 4129 p2p->own_freq_preference = freq; 4130} 4131 4132 4133const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p) 4134{ 4135 if (p2p == NULL || p2p->go_neg_peer == NULL) 4136 return NULL; 4137 return p2p->go_neg_peer->info.p2p_device_addr; 4138} 4139 4140 4141const struct p2p_peer_info * 4142p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next) 4143{ 4144 struct p2p_device *dev; 4145 4146 if (addr) { 4147 dev = p2p_get_device(p2p, addr); 4148 if (!dev) 4149 return NULL; 4150 4151 if (!next) { 4152 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 4153 return NULL; 4154 4155 return &dev->info; 4156 } else { 4157 do { 4158 dev = dl_list_first(&dev->list, 4159 struct p2p_device, 4160 list); 4161 if (&dev->list == &p2p->devices) 4162 return NULL; 4163 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY); 4164 } 4165 } else { 4166 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4167 if (!dev) 4168 return NULL; 4169 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 4170 dev = dl_list_first(&dev->list, 4171 struct p2p_device, 4172 list); 4173 if (&dev->list == &p2p->devices) 4174 return NULL; 4175 } 4176 } 4177 4178 return &dev->info; 4179} 4180 4181 4182int p2p_in_progress(struct p2p_data *p2p) 4183{ 4184 if (p2p == NULL) 4185 return 0; 4186 if (p2p->state == P2P_SEARCH) 4187 return 2; 4188 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING; 4189} 4190 4191 4192void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout, 4193 u8 client_timeout) 4194{ 4195 if (p2p) { 4196 p2p->go_timeout = go_timeout; 4197 p2p->client_timeout = client_timeout; 4198 } 4199} 4200 4201 4202#ifdef CONFIG_WIFI_DISPLAY 4203 4204static void p2p_update_wfd_ie_groups(struct p2p_data *p2p) 4205{ 4206 size_t g; 4207 struct p2p_group *group; 4208 4209 for (g = 0; g < p2p->num_groups; g++) { 4210 group = p2p->groups[g]; 4211 p2p_group_force_beacon_update_ies(group); 4212 } 4213} 4214 4215 4216int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie) 4217{ 4218 wpabuf_free(p2p->wfd_ie_beacon); 4219 p2p->wfd_ie_beacon = ie; 4220 p2p_update_wfd_ie_groups(p2p); 4221 return 0; 4222} 4223 4224 4225int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie) 4226{ 4227 wpabuf_free(p2p->wfd_ie_probe_req); 4228 p2p->wfd_ie_probe_req = ie; 4229 return 0; 4230} 4231 4232 4233int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie) 4234{ 4235 wpabuf_free(p2p->wfd_ie_probe_resp); 4236 p2p->wfd_ie_probe_resp = ie; 4237 p2p_update_wfd_ie_groups(p2p); 4238 return 0; 4239} 4240 4241 4242int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie) 4243{ 4244 wpabuf_free(p2p->wfd_ie_assoc_req); 4245 p2p->wfd_ie_assoc_req = ie; 4246 return 0; 4247} 4248 4249 4250int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie) 4251{ 4252 wpabuf_free(p2p->wfd_ie_invitation); 4253 p2p->wfd_ie_invitation = ie; 4254 return 0; 4255} 4256 4257 4258int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie) 4259{ 4260 wpabuf_free(p2p->wfd_ie_prov_disc_req); 4261 p2p->wfd_ie_prov_disc_req = ie; 4262 return 0; 4263} 4264 4265 4266int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie) 4267{ 4268 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 4269 p2p->wfd_ie_prov_disc_resp = ie; 4270 return 0; 4271} 4272 4273 4274int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie) 4275{ 4276 wpabuf_free(p2p->wfd_ie_go_neg); 4277 p2p->wfd_ie_go_neg = ie; 4278 return 0; 4279} 4280 4281 4282int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem) 4283{ 4284 wpabuf_free(p2p->wfd_dev_info); 4285 if (elem) { 4286 p2p->wfd_dev_info = wpabuf_dup(elem); 4287 if (p2p->wfd_dev_info == NULL) 4288 return -1; 4289 } else 4290 p2p->wfd_dev_info = NULL; 4291 4292 return 0; 4293} 4294 4295 4296int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem) 4297{ 4298 wpabuf_free(p2p->wfd_assoc_bssid); 4299 if (elem) { 4300 p2p->wfd_assoc_bssid = wpabuf_dup(elem); 4301 if (p2p->wfd_assoc_bssid == NULL) 4302 return -1; 4303 } else 4304 p2p->wfd_assoc_bssid = NULL; 4305 4306 return 0; 4307} 4308 4309 4310int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p, 4311 const struct wpabuf *elem) 4312{ 4313 wpabuf_free(p2p->wfd_coupled_sink_info); 4314 if (elem) { 4315 p2p->wfd_coupled_sink_info = wpabuf_dup(elem); 4316 if (p2p->wfd_coupled_sink_info == NULL) 4317 return -1; 4318 } else 4319 p2p->wfd_coupled_sink_info = NULL; 4320 4321 return 0; 4322} 4323 4324#endif /* CONFIG_WIFI_DISPLAY */ 4325 4326 4327int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int, 4328 int max_disc_tu) 4329{ 4330 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0) 4331 return -1; 4332 4333 p2p->min_disc_int = min_disc_int; 4334 p2p->max_disc_int = max_disc_int; 4335 p2p->max_disc_tu = max_disc_tu; 4336 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d", 4337 min_disc_int, max_disc_int, max_disc_tu); 4338 4339 return 0; 4340} 4341 4342 4343void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...) 4344{ 4345 va_list ap; 4346 char buf[500]; 4347 4348 if (!p2p->cfg->debug_print) 4349 return; 4350 4351 va_start(ap, fmt); 4352 vsnprintf(buf, sizeof(buf), fmt, ap); 4353 buf[sizeof(buf) - 1] = '\0'; 4354 va_end(ap); 4355 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf); 4356} 4357 4358 4359void p2p_info(struct p2p_data *p2p, const char *fmt, ...) 4360{ 4361 va_list ap; 4362 char buf[500]; 4363 4364 if (!p2p->cfg->debug_print) 4365 return; 4366 4367 va_start(ap, fmt); 4368 vsnprintf(buf, sizeof(buf), fmt, ap); 4369 buf[sizeof(buf) - 1] = '\0'; 4370 va_end(ap); 4371 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf); 4372} 4373 4374 4375void p2p_err(struct p2p_data *p2p, const char *fmt, ...) 4376{ 4377 va_list ap; 4378 char buf[500]; 4379 4380 if (!p2p->cfg->debug_print) 4381 return; 4382 4383 va_start(ap, fmt); 4384 vsnprintf(buf, sizeof(buf), fmt, ap); 4385 buf[sizeof(buf) - 1] = '\0'; 4386 va_end(ap); 4387 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf); 4388} 4389 4390 4391#ifdef CONFIG_WPS_NFC 4392 4393static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p, 4394 int client_freq, 4395 const u8 *go_dev_addr, 4396 const u8 *ssid, size_t ssid_len) 4397{ 4398 struct wpabuf *buf; 4399 u8 op_class, channel; 4400 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP; 4401 4402 buf = wpabuf_alloc(1000); 4403 if (buf == NULL) 4404 return NULL; 4405 4406 op_class = p2p->cfg->reg_class; 4407 channel = p2p->cfg->channel; 4408 4409 p2p_buf_add_capability(buf, p2p->dev_capab & 4410 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 4411 p2p_buf_add_device_info(buf, p2p, NULL); 4412 4413 if (p2p->num_groups > 0) { 4414 role = P2P_GO_IN_A_GROUP; 4415 p2p_freq_to_channel(p2p_group_get_freq(p2p->groups[0]), 4416 &op_class, &channel); 4417 } else if (client_freq > 0) { 4418 role = P2P_CLIENT_IN_A_GROUP; 4419 p2p_freq_to_channel(client_freq, &op_class, &channel); 4420 } 4421 4422 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class, 4423 channel, role); 4424 4425 if (p2p->num_groups > 0) { 4426 /* Limit number of clients to avoid very long message */ 4427 p2p_buf_add_group_info(p2p->groups[0], buf, 5); 4428 p2p_group_buf_add_id(p2p->groups[0], buf); 4429 } else if (client_freq > 0 && 4430 go_dev_addr && !is_zero_ether_addr(go_dev_addr) && 4431 ssid && ssid_len > 0) { 4432 /* 4433 * Add the optional P2P Group ID to indicate in which group this 4434 * device is a P2P Client. 4435 */ 4436 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len); 4437 } 4438 4439 return buf; 4440} 4441 4442 4443struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p, 4444 int client_freq, 4445 const u8 *go_dev_addr, 4446 const u8 *ssid, size_t ssid_len) 4447{ 4448 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 4449 ssid_len); 4450} 4451 4452 4453struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p, 4454 int client_freq, 4455 const u8 *go_dev_addr, 4456 const u8 *ssid, size_t ssid_len) 4457{ 4458 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 4459 ssid_len); 4460} 4461 4462 4463int p2p_process_nfc_connection_handover(struct p2p_data *p2p, 4464 struct p2p_nfc_params *params) 4465{ 4466 struct p2p_message msg; 4467 struct p2p_device *dev; 4468 const u8 *p2p_dev_addr; 4469 int freq; 4470 enum p2p_role_indication role; 4471 4472 params->next_step = NO_ACTION; 4473 4474 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len, 4475 params->p2p_attr, params->p2p_len, &msg)) { 4476 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC"); 4477 p2p_parse_free(&msg); 4478 return -1; 4479 } 4480 4481 if (msg.p2p_device_addr) 4482 p2p_dev_addr = msg.p2p_device_addr; 4483 else if (msg.device_id) 4484 p2p_dev_addr = msg.device_id; 4485 else { 4486 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 4487 p2p_parse_free(&msg); 4488 return -1; 4489 } 4490 4491 if (msg.oob_dev_password) { 4492 os_memcpy(params->oob_dev_pw, msg.oob_dev_password, 4493 msg.oob_dev_password_len); 4494 params->oob_dev_pw_len = msg.oob_dev_password_len; 4495 } 4496 4497 dev = p2p_create_device(p2p, p2p_dev_addr); 4498 if (dev == NULL) { 4499 p2p_parse_free(&msg); 4500 return -1; 4501 } 4502 4503 params->peer = &dev->info; 4504 4505 os_get_reltime(&dev->last_seen); 4506 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 4507 p2p_copy_wps_info(p2p, dev, 0, &msg); 4508 4509 if (!msg.oob_go_neg_channel) { 4510 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included"); 4511 return -1; 4512 } 4513 4514 if (msg.oob_go_neg_channel[3] == 0 && 4515 msg.oob_go_neg_channel[4] == 0) 4516 freq = 0; 4517 else 4518 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3], 4519 msg.oob_go_neg_channel[4]); 4520 if (freq < 0) { 4521 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel"); 4522 return -1; 4523 } 4524 role = msg.oob_go_neg_channel[5]; 4525 4526 if (role == P2P_GO_IN_A_GROUP) { 4527 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq); 4528 params->go_freq = freq; 4529 } else if (role == P2P_CLIENT_IN_A_GROUP) { 4530 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz", 4531 freq); 4532 params->go_freq = freq; 4533 } else 4534 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq); 4535 dev->oob_go_neg_freq = freq; 4536 4537 if (!params->sel && role != P2P_GO_IN_A_GROUP) { 4538 freq = p2p_channel_to_freq(p2p->cfg->reg_class, 4539 p2p->cfg->channel); 4540 if (freq < 0) { 4541 p2p_dbg(p2p, "Own listen channel not known"); 4542 return -1; 4543 } 4544 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq); 4545 dev->oob_go_neg_freq = freq; 4546 } 4547 4548 if (msg.group_id) { 4549 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN); 4550 params->go_ssid_len = msg.group_id_len - ETH_ALEN; 4551 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN, 4552 params->go_ssid_len); 4553 } 4554 4555 p2p_parse_free(&msg); 4556 4557 if (dev->flags & P2P_DEV_USER_REJECTED) { 4558 p2p_dbg(p2p, "Do not report rejected device"); 4559 return 0; 4560 } 4561 4562 if (!(dev->flags & P2P_DEV_REPORTED)) { 4563 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info, 4564 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 4565 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 4566 } 4567 4568 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0) 4569 params->next_step = BOTH_GO; 4570 else if (role == P2P_GO_IN_A_GROUP) 4571 params->next_step = JOIN_GROUP; 4572 else if (role == P2P_CLIENT_IN_A_GROUP) { 4573 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 4574 params->next_step = PEER_CLIENT; 4575 } else if (p2p->num_groups > 0) 4576 params->next_step = AUTH_JOIN; 4577 else if (params->sel) 4578 params->next_step = INIT_GO_NEG; 4579 else 4580 params->next_step = RESP_GO_NEG; 4581 4582 return 0; 4583} 4584 4585 4586void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id, 4587 int go_intent, 4588 const u8 *own_interface_addr) 4589{ 4590 4591 p2p->authorized_oob_dev_pw_id = dev_pw_id; 4592 if (dev_pw_id == 0) { 4593 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover"); 4594 return; 4595 } 4596 4597 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover", 4598 dev_pw_id); 4599 4600 p2p->go_intent = go_intent; 4601 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 4602} 4603 4604#endif /* CONFIG_WPS_NFC */ 4605