1 /* 2 * Wi-Fi Direct - P2P module 3 * Copyright (c) 2009-2010, Atheros Communications 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "includes.h" 10 11 #include "common.h" 12 #include "eloop.h" 13 #include "common/ieee802_11_defs.h" 14 #include "common/ieee802_11_common.h" 15 #include "common/wpa_ctrl.h" 16 #include "wps/wps_i.h" 17 #include "p2p_i.h" 18 #include "p2p.h" 19 20 21 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx); 22 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev); 23 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 24 const u8 *sa, const u8 *data, size_t len, 25 int rx_freq); 26 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 27 const u8 *sa, const u8 *data, 28 size_t len); 29 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx); 30 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx); 31 32 33 /* 34 * p2p_scan recovery timeout 35 * 36 * Many drivers are using 30 second timeout on scan results. Allow a bit larger 37 * timeout for this to avoid hitting P2P timeout unnecessarily. 38 */ 39 #define P2P_SCAN_TIMEOUT 35 40 41 /** 42 * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer 43 * entries will be removed 44 */ 45 #ifndef P2P_PEER_EXPIRATION_AGE 46 #define P2P_PEER_EXPIRATION_AGE 60 47 #endif /* P2P_PEER_EXPIRATION_AGE */ 48 49 #define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2) 50 51 static void p2p_expire_peers(struct p2p_data *p2p) 52 { 53 struct p2p_device *dev, *n; 54 struct os_reltime now; 55 size_t i; 56 57 os_get_reltime(&now); 58 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) { 59 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec) 60 continue; 61 62 if (dev == p2p->go_neg_peer) { 63 /* 64 * GO Negotiation is in progress with the peer, so 65 * don't expire the peer entry until GO Negotiation 66 * fails or times out. 67 */ 68 continue; 69 } 70 71 if (p2p->cfg->go_connected && 72 p2p->cfg->go_connected(p2p->cfg->cb_ctx, 73 dev->info.p2p_device_addr)) { 74 /* 75 * We are connected as a client to a group in which the 76 * peer is the GO, so do not expire the peer entry. 77 */ 78 os_get_reltime(&dev->last_seen); 79 continue; 80 } 81 82 for (i = 0; i < p2p->num_groups; i++) { 83 if (p2p_group_is_client_connected( 84 p2p->groups[i], dev->info.p2p_device_addr)) 85 break; 86 } 87 if (i < p2p->num_groups) { 88 /* 89 * The peer is connected as a client in a group where 90 * we are the GO, so do not expire the peer entry. 91 */ 92 os_get_reltime(&dev->last_seen); 93 continue; 94 } 95 96 p2p_dbg(p2p, "Expiring old peer entry " MACSTR, 97 MAC2STR(dev->info.p2p_device_addr)); 98 dl_list_del(&dev->list); 99 p2p_device_free(p2p, dev); 100 } 101 } 102 103 104 static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx) 105 { 106 struct p2p_data *p2p = eloop_ctx; 107 p2p_expire_peers(p2p); 108 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 109 p2p_expiration_timeout, p2p, NULL); 110 } 111 112 113 static const char * p2p_state_txt(int state) 114 { 115 switch (state) { 116 case P2P_IDLE: 117 return "IDLE"; 118 case P2P_SEARCH: 119 return "SEARCH"; 120 case P2P_CONNECT: 121 return "CONNECT"; 122 case P2P_CONNECT_LISTEN: 123 return "CONNECT_LISTEN"; 124 case P2P_GO_NEG: 125 return "GO_NEG"; 126 case P2P_LISTEN_ONLY: 127 return "LISTEN_ONLY"; 128 case P2P_WAIT_PEER_CONNECT: 129 return "WAIT_PEER_CONNECT"; 130 case P2P_WAIT_PEER_IDLE: 131 return "WAIT_PEER_IDLE"; 132 case P2P_SD_DURING_FIND: 133 return "SD_DURING_FIND"; 134 case P2P_PROVISIONING: 135 return "PROVISIONING"; 136 case P2P_PD_DURING_FIND: 137 return "PD_DURING_FIND"; 138 case P2P_INVITE: 139 return "INVITE"; 140 case P2P_INVITE_LISTEN: 141 return "INVITE_LISTEN"; 142 default: 143 return "?"; 144 } 145 } 146 147 148 const char * p2p_get_state_txt(struct p2p_data *p2p) 149 { 150 return p2p_state_txt(p2p->state); 151 } 152 153 154 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr) 155 { 156 struct p2p_device *dev = NULL; 157 158 if (!addr || !p2p) 159 return 0; 160 161 dev = p2p_get_device(p2p, addr); 162 if (dev) 163 return dev->wps_prov_info; 164 else 165 return 0; 166 } 167 168 169 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr) 170 { 171 struct p2p_device *dev = NULL; 172 173 if (!addr || !p2p) 174 return; 175 176 dev = p2p_get_device(p2p, addr); 177 if (dev) 178 dev->wps_prov_info = 0; 179 } 180 181 182 void p2p_set_state(struct p2p_data *p2p, int new_state) 183 { 184 p2p_dbg(p2p, "State %s -> %s", 185 p2p_state_txt(p2p->state), p2p_state_txt(new_state)); 186 p2p->state = new_state; 187 188 if (new_state == P2P_IDLE && p2p->pending_channel) { 189 p2p_dbg(p2p, "Apply change in listen channel"); 190 p2p->cfg->reg_class = p2p->pending_reg_class; 191 p2p->cfg->channel = p2p->pending_channel; 192 p2p->pending_reg_class = 0; 193 p2p->pending_channel = 0; 194 } 195 } 196 197 198 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec) 199 { 200 p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec", 201 p2p_state_txt(p2p->state), sec, usec); 202 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 203 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL); 204 } 205 206 207 void p2p_clear_timeout(struct p2p_data *p2p) 208 { 209 p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state)); 210 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 211 } 212 213 214 void p2p_go_neg_failed(struct p2p_data *p2p, struct p2p_device *peer, 215 int status) 216 { 217 struct p2p_go_neg_results res; 218 p2p_clear_timeout(p2p); 219 p2p_set_state(p2p, P2P_IDLE); 220 if (p2p->go_neg_peer) { 221 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 222 p2p->go_neg_peer->wps_method = WPS_NOT_READY; 223 p2p->go_neg_peer->oob_pw_id = 0; 224 } 225 p2p->go_neg_peer = NULL; 226 227 os_memset(&res, 0, sizeof(res)); 228 res.status = status; 229 if (peer) { 230 wpabuf_free(peer->go_neg_conf); 231 peer->go_neg_conf = NULL; 232 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, 233 ETH_ALEN); 234 os_memcpy(res.peer_interface_addr, peer->intended_addr, 235 ETH_ALEN); 236 } 237 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 238 } 239 240 241 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc) 242 { 243 unsigned int r, tu; 244 int freq; 245 struct wpabuf *ies; 246 247 p2p_dbg(p2p, "Starting short listen state (state=%s)", 248 p2p_state_txt(p2p->state)); 249 250 if (p2p->pending_listen_freq) { 251 /* We have a pending p2p_listen request */ 252 p2p_dbg(p2p, "p2p_listen command pending already"); 253 return; 254 } 255 256 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 257 if (freq < 0) { 258 p2p_dbg(p2p, "Unknown regulatory class/channel"); 259 return; 260 } 261 262 if (os_get_random((u8 *) &r, sizeof(r)) < 0) 263 r = 0; 264 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) + 265 p2p->min_disc_int) * 100; 266 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu) 267 tu = p2p->max_disc_tu; 268 if (!dev_disc && tu < 100) 269 tu = 100; /* Need to wait in non-device discovery use cases */ 270 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen) 271 tu = p2p->cfg->max_listen * 1000 / 1024; 272 273 if (tu == 0) { 274 p2p_dbg(p2p, "Skip listen state since duration was 0 TU"); 275 p2p_set_timeout(p2p, 0, 0); 276 return; 277 } 278 279 ies = p2p_build_probe_resp_ies(p2p); 280 if (ies == NULL) 281 return; 282 283 p2p->pending_listen_freq = freq; 284 p2p->pending_listen_sec = 0; 285 p2p->pending_listen_usec = 1024 * tu; 286 287 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000, 288 ies) < 0) { 289 p2p_dbg(p2p, "Failed to start listen mode"); 290 p2p->pending_listen_freq = 0; 291 } 292 wpabuf_free(ies); 293 } 294 295 296 int p2p_listen(struct p2p_data *p2p, unsigned int timeout) 297 { 298 int freq; 299 struct wpabuf *ies; 300 301 p2p_dbg(p2p, "Going to listen(only) state"); 302 303 if (p2p->pending_listen_freq) { 304 /* We have a pending p2p_listen request */ 305 p2p_dbg(p2p, "p2p_listen command pending already"); 306 return -1; 307 } 308 309 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 310 if (freq < 0) { 311 p2p_dbg(p2p, "Unknown regulatory class/channel"); 312 return -1; 313 } 314 315 p2p->pending_listen_sec = timeout / 1000; 316 p2p->pending_listen_usec = (timeout % 1000) * 1000; 317 318 if (p2p->p2p_scan_running) { 319 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) { 320 p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen"); 321 return 0; 322 } 323 p2p_dbg(p2p, "p2p_scan running - delay start of listen state"); 324 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN; 325 return 0; 326 } 327 328 ies = p2p_build_probe_resp_ies(p2p); 329 if (ies == NULL) 330 return -1; 331 332 p2p->pending_listen_freq = freq; 333 334 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) { 335 p2p_dbg(p2p, "Failed to start listen mode"); 336 p2p->pending_listen_freq = 0; 337 wpabuf_free(ies); 338 return -1; 339 } 340 wpabuf_free(ies); 341 342 p2p_set_state(p2p, P2P_LISTEN_ONLY); 343 344 return 0; 345 } 346 347 348 static void p2p_device_clear_reported(struct p2p_data *p2p) 349 { 350 struct p2p_device *dev; 351 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) 352 dev->flags &= ~P2P_DEV_REPORTED; 353 } 354 355 356 /** 357 * p2p_get_device - Fetch a peer entry 358 * @p2p: P2P module context from p2p_init() 359 * @addr: P2P Device Address of the peer 360 * Returns: Pointer to the device entry or %NULL if not found 361 */ 362 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr) 363 { 364 struct p2p_device *dev; 365 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 366 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0) 367 return dev; 368 } 369 return NULL; 370 } 371 372 373 /** 374 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address 375 * @p2p: P2P module context from p2p_init() 376 * @addr: P2P Interface Address of the peer 377 * Returns: Pointer to the device entry or %NULL if not found 378 */ 379 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p, 380 const u8 *addr) 381 { 382 struct p2p_device *dev; 383 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 384 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0) 385 return dev; 386 } 387 return NULL; 388 } 389 390 391 /** 392 * p2p_create_device - Create a peer entry 393 * @p2p: P2P module context from p2p_init() 394 * @addr: P2P Device Address of the peer 395 * Returns: Pointer to the device entry or %NULL on failure 396 * 397 * If there is already an entry for the peer, it will be returned instead of 398 * creating a new one. 399 */ 400 static struct p2p_device * p2p_create_device(struct p2p_data *p2p, 401 const u8 *addr) 402 { 403 struct p2p_device *dev, *oldest = NULL; 404 size_t count = 0; 405 406 dev = p2p_get_device(p2p, addr); 407 if (dev) 408 return dev; 409 410 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 411 count++; 412 if (oldest == NULL || 413 os_reltime_before(&dev->last_seen, &oldest->last_seen)) 414 oldest = dev; 415 } 416 if (count + 1 > p2p->cfg->max_peers && oldest) { 417 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer"); 418 dl_list_del(&oldest->list); 419 p2p_device_free(p2p, oldest); 420 } 421 422 dev = os_zalloc(sizeof(*dev)); 423 if (dev == NULL) 424 return NULL; 425 dl_list_add(&p2p->devices, &dev->list); 426 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN); 427 428 return dev; 429 } 430 431 432 static void p2p_copy_client_info(struct p2p_device *dev, 433 struct p2p_client_info *cli) 434 { 435 os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len); 436 dev->info.device_name[cli->dev_name_len] = '\0'; 437 dev->info.dev_capab = cli->dev_capab; 438 dev->info.config_methods = cli->config_methods; 439 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8); 440 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types; 441 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types, 442 dev->info.wps_sec_dev_type_list_len); 443 } 444 445 446 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr, 447 const u8 *go_interface_addr, int freq, 448 const u8 *gi, size_t gi_len) 449 { 450 struct p2p_group_info info; 451 size_t c; 452 struct p2p_device *dev; 453 454 if (gi == NULL) 455 return 0; 456 457 if (p2p_group_info_parse(gi, gi_len, &info) < 0) 458 return -1; 459 460 /* 461 * Clear old data for this group; if the devices are still in the 462 * group, the information will be restored in the loop following this. 463 */ 464 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 465 if (os_memcmp(dev->member_in_go_iface, go_interface_addr, 466 ETH_ALEN) == 0) { 467 os_memset(dev->member_in_go_iface, 0, ETH_ALEN); 468 os_memset(dev->member_in_go_dev, 0, ETH_ALEN); 469 } 470 } 471 472 for (c = 0; c < info.num_clients; c++) { 473 struct p2p_client_info *cli = &info.client[c]; 474 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr, 475 ETH_ALEN) == 0) 476 continue; /* ignore our own entry */ 477 dev = p2p_get_device(p2p, cli->p2p_device_addr); 478 if (dev) { 479 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY | 480 P2P_DEV_PROBE_REQ_ONLY)) { 481 /* 482 * Update information since we have not 483 * received this directly from the client. 484 */ 485 p2p_copy_client_info(dev, cli); 486 } else { 487 /* 488 * Need to update P2P Client Discoverability 489 * flag since it is valid only in P2P Group 490 * Info attribute. 491 */ 492 dev->info.dev_capab &= 493 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 494 dev->info.dev_capab |= 495 cli->dev_capab & 496 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 497 } 498 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 499 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 500 } 501 } else { 502 dev = p2p_create_device(p2p, cli->p2p_device_addr); 503 if (dev == NULL) 504 continue; 505 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 506 p2p_copy_client_info(dev, cli); 507 dev->oper_freq = freq; 508 p2p->cfg->dev_found(p2p->cfg->cb_ctx, 509 dev->info.p2p_device_addr, 510 &dev->info, 1); 511 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 512 } 513 514 os_memcpy(dev->interface_addr, cli->p2p_interface_addr, 515 ETH_ALEN); 516 os_get_reltime(&dev->last_seen); 517 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN); 518 os_memcpy(dev->member_in_go_iface, go_interface_addr, 519 ETH_ALEN); 520 } 521 522 return 0; 523 } 524 525 526 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev, 527 int probe_req, const struct p2p_message *msg) 528 { 529 os_memcpy(dev->info.device_name, msg->device_name, 530 sizeof(dev->info.device_name)); 531 532 if (msg->manufacturer && 533 msg->manufacturer_len < sizeof(dev->info.manufacturer)) { 534 os_memset(dev->info.manufacturer, 0, 535 sizeof(dev->info.manufacturer)); 536 os_memcpy(dev->info.manufacturer, msg->manufacturer, 537 msg->manufacturer_len); 538 } 539 540 if (msg->model_name && 541 msg->model_name_len < sizeof(dev->info.model_name)) { 542 os_memset(dev->info.model_name, 0, 543 sizeof(dev->info.model_name)); 544 os_memcpy(dev->info.model_name, msg->model_name, 545 msg->model_name_len); 546 } 547 548 if (msg->model_number && 549 msg->model_number_len < sizeof(dev->info.model_number)) { 550 os_memset(dev->info.model_number, 0, 551 sizeof(dev->info.model_number)); 552 os_memcpy(dev->info.model_number, msg->model_number, 553 msg->model_number_len); 554 } 555 556 if (msg->serial_number && 557 msg->serial_number_len < sizeof(dev->info.serial_number)) { 558 os_memset(dev->info.serial_number, 0, 559 sizeof(dev->info.serial_number)); 560 os_memcpy(dev->info.serial_number, msg->serial_number, 561 msg->serial_number_len); 562 } 563 564 if (msg->pri_dev_type) 565 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type, 566 sizeof(dev->info.pri_dev_type)); 567 else if (msg->wps_pri_dev_type) 568 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type, 569 sizeof(dev->info.pri_dev_type)); 570 571 if (msg->wps_sec_dev_type_list) { 572 os_memcpy(dev->info.wps_sec_dev_type_list, 573 msg->wps_sec_dev_type_list, 574 msg->wps_sec_dev_type_list_len); 575 dev->info.wps_sec_dev_type_list_len = 576 msg->wps_sec_dev_type_list_len; 577 } 578 579 if (msg->capability) { 580 /* 581 * P2P Client Discoverability bit is reserved in all frames 582 * that use this function, so do not change its value here. 583 */ 584 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 585 dev->info.dev_capab |= msg->capability[0] & 586 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 587 dev->info.group_capab = msg->capability[1]; 588 } 589 590 if (msg->ext_listen_timing) { 591 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing); 592 dev->ext_listen_interval = 593 WPA_GET_LE16(msg->ext_listen_timing + 2); 594 } 595 596 if (!probe_req) { 597 u16 new_config_methods; 598 new_config_methods = msg->config_methods ? 599 msg->config_methods : msg->wps_config_methods; 600 if (new_config_methods && 601 dev->info.config_methods != new_config_methods) { 602 p2p_dbg(p2p, "Update peer " MACSTR 603 " config_methods 0x%x -> 0x%x", 604 MAC2STR(dev->info.p2p_device_addr), 605 dev->info.config_methods, 606 new_config_methods); 607 dev->info.config_methods = new_config_methods; 608 } 609 } 610 } 611 612 613 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies, 614 size_t ies_len) 615 { 616 const u8 *pos, *end; 617 u8 id, len; 618 619 wpabuf_free(dev->info.vendor_elems); 620 dev->info.vendor_elems = NULL; 621 622 end = ies + ies_len; 623 624 for (pos = ies; pos + 1 < end; pos += len) { 625 id = *pos++; 626 len = *pos++; 627 628 if (pos + len > end) 629 break; 630 631 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3) 632 continue; 633 634 if (len >= 4) { 635 u32 type = WPA_GET_BE32(pos); 636 637 if (type == WPA_IE_VENDOR_TYPE || 638 type == WMM_IE_VENDOR_TYPE || 639 type == WPS_IE_VENDOR_TYPE || 640 type == P2P_IE_VENDOR_TYPE || 641 type == WFD_IE_VENDOR_TYPE) 642 continue; 643 } 644 645 /* Unknown vendor element - make raw IE data available */ 646 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0) 647 break; 648 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len); 649 } 650 } 651 652 653 /** 654 * p2p_add_device - Add peer entries based on scan results or P2P frames 655 * @p2p: P2P module context from p2p_init() 656 * @addr: Source address of Beacon or Probe Response frame (may be either 657 * P2P Device Address or P2P Interface Address) 658 * @level: Signal level (signal strength of the received frame from the peer) 659 * @freq: Frequency on which the Beacon or Probe Response frame was received 660 * @rx_time: Time when the result was received 661 * @ies: IEs from the Beacon or Probe Response frame 662 * @ies_len: Length of ies buffer in octets 663 * @scan_res: Whether this was based on scan results 664 * Returns: 0 on success, -1 on failure 665 * 666 * If the scan result is for a GO, the clients in the group will also be added 667 * to the peer table. This function can also be used with some other frames 668 * like Provision Discovery Request that contains P2P Capability and P2P Device 669 * Info attributes. 670 */ 671 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq, 672 struct os_reltime *rx_time, int level, const u8 *ies, 673 size_t ies_len, int scan_res) 674 { 675 struct p2p_device *dev; 676 struct p2p_message msg; 677 const u8 *p2p_dev_addr; 678 int i; 679 struct os_reltime time_now; 680 681 os_memset(&msg, 0, sizeof(msg)); 682 if (p2p_parse_ies(ies, ies_len, &msg)) { 683 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry"); 684 p2p_parse_free(&msg); 685 return -1; 686 } 687 688 if (msg.p2p_device_addr) 689 p2p_dev_addr = msg.p2p_device_addr; 690 else if (msg.device_id) 691 p2p_dev_addr = msg.device_id; 692 else { 693 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 694 p2p_parse_free(&msg); 695 return -1; 696 } 697 698 if (!is_zero_ether_addr(p2p->peer_filter) && 699 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) { 700 p2p_dbg(p2p, "Do not add peer filter for " MACSTR 701 " due to peer filter", MAC2STR(p2p_dev_addr)); 702 p2p_parse_free(&msg); 703 return 0; 704 } 705 706 dev = p2p_create_device(p2p, p2p_dev_addr); 707 if (dev == NULL) { 708 p2p_parse_free(&msg); 709 return -1; 710 } 711 712 if (rx_time == NULL) { 713 os_get_reltime(&time_now); 714 rx_time = &time_now; 715 } 716 717 /* 718 * Update the device entry only if the new peer 719 * entry is newer than the one previously stored. 720 */ 721 if (dev->last_seen.sec > 0 && 722 os_reltime_before(rx_time, &dev->last_seen)) { 723 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)", 724 (unsigned int) rx_time->sec, 725 (unsigned int) rx_time->usec, 726 (unsigned int) dev->last_seen.sec, 727 (unsigned int) dev->last_seen.usec); 728 p2p_parse_free(&msg); 729 return -1; 730 } 731 732 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime)); 733 734 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 735 736 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0) 737 os_memcpy(dev->interface_addr, addr, ETH_ALEN); 738 if (msg.ssid && 739 msg.ssid[1] <= sizeof(dev->oper_ssid) && 740 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 741 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 742 != 0)) { 743 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]); 744 dev->oper_ssid_len = msg.ssid[1]; 745 } 746 747 if (freq >= 2412 && freq <= 2484 && msg.ds_params && 748 *msg.ds_params >= 1 && *msg.ds_params <= 14) { 749 int ds_freq; 750 if (*msg.ds_params == 14) 751 ds_freq = 2484; 752 else 753 ds_freq = 2407 + *msg.ds_params * 5; 754 if (freq != ds_freq) { 755 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz", 756 freq, ds_freq); 757 freq = ds_freq; 758 } 759 } 760 761 if (dev->listen_freq && dev->listen_freq != freq && scan_res) { 762 p2p_dbg(p2p, "Update Listen frequency based on scan results (" 763 MACSTR " %d -> %d MHz (DS param %d)", 764 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq, 765 freq, msg.ds_params ? *msg.ds_params : -1); 766 } 767 if (scan_res) { 768 dev->listen_freq = freq; 769 if (msg.group_info) 770 dev->oper_freq = freq; 771 } 772 dev->info.level = level; 773 774 p2p_copy_wps_info(p2p, dev, 0, &msg); 775 776 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 777 wpabuf_free(dev->info.wps_vendor_ext[i]); 778 dev->info.wps_vendor_ext[i] = NULL; 779 } 780 781 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 782 if (msg.wps_vendor_ext[i] == NULL) 783 break; 784 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy( 785 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]); 786 if (dev->info.wps_vendor_ext[i] == NULL) 787 break; 788 } 789 790 if (msg.wfd_subelems) { 791 wpabuf_free(dev->info.wfd_subelems); 792 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 793 } 794 795 if (scan_res) { 796 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq, 797 msg.group_info, msg.group_info_len); 798 } 799 800 p2p_parse_free(&msg); 801 802 p2p_update_peer_vendor_elems(dev, ies, ies_len); 803 804 if (dev->flags & P2P_DEV_REPORTED) 805 return 0; 806 807 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)", 808 freq, (unsigned int) rx_time->sec, 809 (unsigned int) rx_time->usec); 810 if (dev->flags & P2P_DEV_USER_REJECTED) { 811 p2p_dbg(p2p, "Do not report rejected device"); 812 return 0; 813 } 814 815 if (dev->info.config_methods == 0 && 816 (freq == 2412 || freq == 2437 || freq == 2462)) { 817 /* 818 * If we have only seen a Beacon frame from a GO, we do not yet 819 * know what WPS config methods it supports. Since some 820 * applications use config_methods value from P2P-DEVICE-FOUND 821 * events, postpone reporting this peer until we've fully 822 * discovered its capabilities. 823 * 824 * At least for now, do this only if the peer was detected on 825 * one of the social channels since that peer can be easily be 826 * found again and there are no limitations of having to use 827 * passive scan on this channels, so this can be done through 828 * Probe Response frame that includes the config_methods 829 * information. 830 */ 831 p2p_dbg(p2p, "Do not report peer " MACSTR 832 " with unknown config methods", MAC2STR(addr)); 833 return 0; 834 } 835 836 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 837 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 838 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 839 840 return 0; 841 } 842 843 844 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev) 845 { 846 int i; 847 848 if (p2p->go_neg_peer == dev) { 849 /* 850 * If GO Negotiation is in progress, report that it has failed. 851 */ 852 p2p_go_neg_failed(p2p, dev, -1); 853 p2p->go_neg_peer = NULL; 854 } 855 if (p2p->invite_peer == dev) 856 p2p->invite_peer = NULL; 857 if (p2p->sd_peer == dev) 858 p2p->sd_peer = NULL; 859 if (p2p->pending_client_disc_go == dev) 860 p2p->pending_client_disc_go = NULL; 861 862 /* dev_lost() device, but only if it was previously dev_found() */ 863 if (dev->flags & P2P_DEV_REPORTED_ONCE) 864 p2p->cfg->dev_lost(p2p->cfg->cb_ctx, 865 dev->info.p2p_device_addr); 866 867 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 868 wpabuf_free(dev->info.wps_vendor_ext[i]); 869 dev->info.wps_vendor_ext[i] = NULL; 870 } 871 872 wpabuf_free(dev->info.wfd_subelems); 873 wpabuf_free(dev->info.vendor_elems); 874 wpabuf_free(dev->go_neg_conf); 875 876 os_free(dev); 877 } 878 879 880 static int p2p_get_next_prog_freq(struct p2p_data *p2p) 881 { 882 struct p2p_channels *c; 883 struct p2p_reg_class *cla; 884 size_t cl, ch; 885 int found = 0; 886 u8 reg_class; 887 u8 channel; 888 int freq; 889 890 c = &p2p->cfg->channels; 891 for (cl = 0; cl < c->reg_classes; cl++) { 892 cla = &c->reg_class[cl]; 893 if (cla->reg_class != p2p->last_prog_scan_class) 894 continue; 895 for (ch = 0; ch < cla->channels; ch++) { 896 if (cla->channel[ch] == p2p->last_prog_scan_chan) { 897 found = 1; 898 break; 899 } 900 } 901 if (found) 902 break; 903 } 904 905 if (!found) { 906 /* Start from beginning */ 907 reg_class = c->reg_class[0].reg_class; 908 channel = c->reg_class[0].channel[0]; 909 } else { 910 /* Pick the next channel */ 911 ch++; 912 if (ch == cla->channels) { 913 cl++; 914 if (cl == c->reg_classes) 915 cl = 0; 916 ch = 0; 917 } 918 reg_class = c->reg_class[cl].reg_class; 919 channel = c->reg_class[cl].channel[ch]; 920 } 921 922 freq = p2p_channel_to_freq(reg_class, channel); 923 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz", 924 reg_class, channel, freq); 925 p2p->last_prog_scan_class = reg_class; 926 p2p->last_prog_scan_chan = channel; 927 928 if (freq == 2412 || freq == 2437 || freq == 2462) 929 return 0; /* No need to add social channels */ 930 return freq; 931 } 932 933 934 static void p2p_search(struct p2p_data *p2p) 935 { 936 int freq = 0; 937 enum p2p_scan_type type; 938 u16 pw_id = DEV_PW_DEFAULT; 939 int res; 940 941 if (p2p->drv_in_listen) { 942 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing"); 943 return; 944 } 945 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 946 947 if (p2p->find_type == P2P_FIND_PROGRESSIVE && 948 (freq = p2p_get_next_prog_freq(p2p)) > 0) { 949 type = P2P_SCAN_SOCIAL_PLUS_ONE; 950 p2p_dbg(p2p, "Starting search (+ freq %u)", freq); 951 } else { 952 type = P2P_SCAN_SOCIAL; 953 p2p_dbg(p2p, "Starting search"); 954 } 955 956 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq, 957 p2p->num_req_dev_types, p2p->req_dev_types, 958 p2p->find_dev_id, pw_id); 959 if (res < 0) { 960 p2p_dbg(p2p, "Scan request failed"); 961 p2p_continue_find(p2p); 962 } else { 963 p2p_dbg(p2p, "Running p2p_scan"); 964 p2p->p2p_scan_running = 1; 965 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 966 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 967 p2p, NULL); 968 } 969 } 970 971 972 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx) 973 { 974 struct p2p_data *p2p = eloop_ctx; 975 p2p_dbg(p2p, "Find timeout -> stop"); 976 p2p_stop_find(p2p); 977 } 978 979 980 static int p2p_run_after_scan(struct p2p_data *p2p) 981 { 982 struct p2p_device *dev; 983 enum p2p_after_scan op; 984 985 if (p2p->after_scan_tx) { 986 p2p->after_scan_tx_in_progress = 1; 987 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion"); 988 p2p->cfg->send_action(p2p->cfg->cb_ctx, 989 p2p->after_scan_tx->freq, 990 p2p->after_scan_tx->dst, 991 p2p->after_scan_tx->src, 992 p2p->after_scan_tx->bssid, 993 (u8 *) (p2p->after_scan_tx + 1), 994 p2p->after_scan_tx->len, 995 p2p->after_scan_tx->wait_time); 996 os_free(p2p->after_scan_tx); 997 p2p->after_scan_tx = NULL; 998 return 1; 999 } 1000 1001 op = p2p->start_after_scan; 1002 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1003 switch (op) { 1004 case P2P_AFTER_SCAN_NOTHING: 1005 break; 1006 case P2P_AFTER_SCAN_LISTEN: 1007 p2p_dbg(p2p, "Start previously requested Listen state"); 1008 p2p_listen(p2p, p2p->pending_listen_sec * 1000 + 1009 p2p->pending_listen_usec / 1000); 1010 return 1; 1011 case P2P_AFTER_SCAN_CONNECT: 1012 p2p_dbg(p2p, "Start previously requested connect with " MACSTR, 1013 MAC2STR(p2p->after_scan_peer)); 1014 dev = p2p_get_device(p2p, p2p->after_scan_peer); 1015 if (dev == NULL) { 1016 p2p_dbg(p2p, "Peer not known anymore"); 1017 break; 1018 } 1019 p2p_connect_send(p2p, dev); 1020 return 1; 1021 } 1022 1023 return 0; 1024 } 1025 1026 1027 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx) 1028 { 1029 struct p2p_data *p2p = eloop_ctx; 1030 int running; 1031 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running); 1032 running = p2p->p2p_scan_running; 1033 /* Make sure we recover from missed scan results callback */ 1034 p2p->p2p_scan_running = 0; 1035 1036 if (running) 1037 p2p_run_after_scan(p2p); 1038 } 1039 1040 1041 static void p2p_free_req_dev_types(struct p2p_data *p2p) 1042 { 1043 p2p->num_req_dev_types = 0; 1044 os_free(p2p->req_dev_types); 1045 p2p->req_dev_types = NULL; 1046 } 1047 1048 1049 int p2p_find(struct p2p_data *p2p, unsigned int timeout, 1050 enum p2p_discovery_type type, 1051 unsigned int num_req_dev_types, const u8 *req_dev_types, 1052 const u8 *dev_id, unsigned int search_delay) 1053 { 1054 int res; 1055 1056 p2p_dbg(p2p, "Starting find (type=%d)", type); 1057 os_get_reltime(&p2p->find_start); 1058 if (p2p->p2p_scan_running) { 1059 p2p_dbg(p2p, "p2p_scan is already running"); 1060 } 1061 1062 p2p_free_req_dev_types(p2p); 1063 if (req_dev_types && num_req_dev_types) { 1064 p2p->req_dev_types = os_malloc(num_req_dev_types * 1065 WPS_DEV_TYPE_LEN); 1066 if (p2p->req_dev_types == NULL) 1067 return -1; 1068 os_memcpy(p2p->req_dev_types, req_dev_types, 1069 num_req_dev_types * WPS_DEV_TYPE_LEN); 1070 p2p->num_req_dev_types = num_req_dev_types; 1071 } 1072 1073 if (dev_id) { 1074 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN); 1075 p2p->find_dev_id = p2p->find_dev_id_buf; 1076 } else 1077 p2p->find_dev_id = NULL; 1078 1079 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1080 p2p_clear_timeout(p2p); 1081 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1082 p2p->find_type = type; 1083 p2p_device_clear_reported(p2p); 1084 p2p_set_state(p2p, P2P_SEARCH); 1085 p2p->search_delay = search_delay; 1086 p2p->in_search_delay = 0; 1087 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1088 p2p->last_p2p_find_timeout = timeout; 1089 if (timeout) 1090 eloop_register_timeout(timeout, 0, p2p_find_timeout, 1091 p2p, NULL); 1092 switch (type) { 1093 case P2P_FIND_START_WITH_FULL: 1094 case P2P_FIND_PROGRESSIVE: 1095 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0, 1096 p2p->num_req_dev_types, 1097 p2p->req_dev_types, dev_id, 1098 DEV_PW_DEFAULT); 1099 break; 1100 case P2P_FIND_ONLY_SOCIAL: 1101 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0, 1102 p2p->num_req_dev_types, 1103 p2p->req_dev_types, dev_id, 1104 DEV_PW_DEFAULT); 1105 break; 1106 default: 1107 return -1; 1108 } 1109 1110 if (res == 0) { 1111 p2p_dbg(p2p, "Running p2p_scan"); 1112 p2p->p2p_scan_running = 1; 1113 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 1114 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 1115 p2p, NULL); 1116 } else if (p2p->p2p_scan_running) { 1117 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running"); 1118 /* wait for the previous p2p_scan to complete */ 1119 res = 0; /* do not report failure */ 1120 } else { 1121 p2p_dbg(p2p, "Failed to start p2p_scan"); 1122 p2p_set_state(p2p, P2P_IDLE); 1123 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1124 } 1125 1126 return res; 1127 } 1128 1129 1130 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq) 1131 { 1132 p2p_dbg(p2p, "Stopping find"); 1133 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1134 p2p_clear_timeout(p2p); 1135 if (p2p->state == P2P_SEARCH) 1136 p2p->cfg->find_stopped(p2p->cfg->cb_ctx); 1137 p2p_set_state(p2p, P2P_IDLE); 1138 p2p_free_req_dev_types(p2p); 1139 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1140 if (p2p->go_neg_peer) 1141 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1142 p2p->go_neg_peer = NULL; 1143 p2p->sd_peer = NULL; 1144 p2p->invite_peer = NULL; 1145 p2p_stop_listen_for_freq(p2p, freq); 1146 } 1147 1148 1149 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq) 1150 { 1151 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) { 1152 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response"); 1153 return; 1154 } 1155 if (p2p->in_listen) { 1156 p2p->in_listen = 0; 1157 p2p_clear_timeout(p2p); 1158 } 1159 if (p2p->drv_in_listen) { 1160 /* 1161 * The driver may not deliver callback to p2p_listen_end() 1162 * when the operation gets canceled, so clear the internal 1163 * variable that is tracking driver state. 1164 */ 1165 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen); 1166 p2p->drv_in_listen = 0; 1167 } 1168 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1169 } 1170 1171 1172 void p2p_stop_listen(struct p2p_data *p2p) 1173 { 1174 if (p2p->state != P2P_LISTEN_ONLY) { 1175 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state."); 1176 return; 1177 } 1178 1179 p2p_stop_listen_for_freq(p2p, 0); 1180 p2p_set_state(p2p, P2P_IDLE); 1181 } 1182 1183 1184 void p2p_stop_find(struct p2p_data *p2p) 1185 { 1186 p2p->pending_listen_freq = 0; 1187 p2p_stop_find_for_freq(p2p, 0); 1188 } 1189 1190 1191 static int p2p_prepare_channel_pref(struct p2p_data *p2p, 1192 unsigned int force_freq, 1193 unsigned int pref_freq, int go) 1194 { 1195 u8 op_class, op_channel; 1196 unsigned int freq = force_freq ? force_freq : pref_freq; 1197 1198 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d", 1199 force_freq, pref_freq, go); 1200 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) { 1201 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq); 1202 return -1; 1203 } 1204 1205 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) && 1206 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class, 1207 op_channel))) { 1208 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P", 1209 freq, op_class, op_channel); 1210 return -1; 1211 } 1212 1213 p2p->op_reg_class = op_class; 1214 p2p->op_channel = op_channel; 1215 1216 if (force_freq) { 1217 p2p->channels.reg_classes = 1; 1218 p2p->channels.reg_class[0].channels = 1; 1219 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 1220 p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 1221 } else { 1222 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1223 sizeof(struct p2p_channels)); 1224 } 1225 1226 return 0; 1227 } 1228 1229 1230 static void p2p_prepare_channel_best(struct p2p_data *p2p) 1231 { 1232 u8 op_class, op_channel; 1233 const int op_classes_5ghz[] = { 124, 115, 0 }; 1234 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 }; 1235 const int op_classes_vht[] = { 128, 0 }; 1236 1237 p2p_dbg(p2p, "Prepare channel best"); 1238 1239 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 && 1240 p2p_supported_freq(p2p, p2p->best_freq_overall) && 1241 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel) 1242 == 0) { 1243 p2p_dbg(p2p, "Select best overall channel as operating channel preference"); 1244 p2p->op_reg_class = op_class; 1245 p2p->op_channel = op_channel; 1246 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 && 1247 p2p_supported_freq(p2p, p2p->best_freq_5) && 1248 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel) 1249 == 0) { 1250 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference"); 1251 p2p->op_reg_class = op_class; 1252 p2p->op_channel = op_channel; 1253 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 && 1254 p2p_supported_freq(p2p, p2p->best_freq_24) && 1255 p2p_freq_to_channel(p2p->best_freq_24, &op_class, 1256 &op_channel) == 0) { 1257 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference"); 1258 p2p->op_reg_class = op_class; 1259 p2p->op_channel = op_channel; 1260 } else if (p2p->cfg->num_pref_chan > 0 && 1261 p2p_channels_includes(&p2p->cfg->channels, 1262 p2p->cfg->pref_chan[0].op_class, 1263 p2p->cfg->pref_chan[0].chan)) { 1264 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference"); 1265 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class; 1266 p2p->op_channel = p2p->cfg->pref_chan[0].chan; 1267 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht, 1268 &p2p->op_reg_class, &p2p->op_channel) == 1269 0) { 1270 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference", 1271 p2p->op_reg_class, p2p->op_channel); 1272 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40, 1273 &p2p->op_reg_class, &p2p->op_channel) == 1274 0) { 1275 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference", 1276 p2p->op_reg_class, p2p->op_channel); 1277 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz, 1278 &p2p->op_reg_class, &p2p->op_channel) == 1279 0) { 1280 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference", 1281 p2p->op_reg_class, p2p->op_channel); 1282 } else if (p2p_channels_includes(&p2p->cfg->channels, 1283 p2p->cfg->op_reg_class, 1284 p2p->cfg->op_channel)) { 1285 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference"); 1286 p2p->op_reg_class = p2p->cfg->op_reg_class; 1287 p2p->op_channel = p2p->cfg->op_channel; 1288 } else if (p2p_channel_random_social(&p2p->cfg->channels, 1289 &p2p->op_reg_class, 1290 &p2p->op_channel) == 0) { 1291 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference", 1292 p2p->op_reg_class, p2p->op_channel); 1293 } else { 1294 /* Select any random available channel from the first available 1295 * operating class */ 1296 p2p_channel_select(&p2p->cfg->channels, NULL, 1297 &p2p->op_reg_class, 1298 &p2p->op_channel); 1299 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference", 1300 p2p->op_channel, p2p->op_reg_class); 1301 } 1302 1303 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1304 sizeof(struct p2p_channels)); 1305 } 1306 1307 1308 /** 1309 * p2p_prepare_channel - Select operating channel for GO Negotiation 1310 * @p2p: P2P module context from p2p_init() 1311 * @dev: Selected peer device 1312 * @force_freq: Forced frequency in MHz or 0 if not forced 1313 * @pref_freq: Preferred frequency in MHz or 0 if no preference 1314 * @go: Whether the local end will be forced to be GO 1315 * Returns: 0 on success, -1 on failure (channel not supported for P2P) 1316 * 1317 * This function is used to do initial operating channel selection for GO 1318 * Negotiation prior to having received peer information. The selected channel 1319 * may be further optimized in p2p_reselect_channel() once the peer information 1320 * is available. 1321 */ 1322 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev, 1323 unsigned int force_freq, unsigned int pref_freq, int go) 1324 { 1325 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d", 1326 force_freq, pref_freq, go); 1327 if (force_freq || pref_freq) { 1328 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) < 1329 0) 1330 return -1; 1331 } else { 1332 p2p_prepare_channel_best(p2p); 1333 } 1334 p2p_channels_dump(p2p, "prepared channels", &p2p->channels); 1335 if (go) 1336 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq); 1337 else if (!force_freq) 1338 p2p_channels_union(&p2p->channels, &p2p->cfg->cli_channels, 1339 &p2p->channels); 1340 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels); 1341 1342 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s", 1343 p2p->op_reg_class, p2p->op_channel, 1344 force_freq ? " (forced)" : ""); 1345 1346 if (force_freq) 1347 dev->flags |= P2P_DEV_FORCE_FREQ; 1348 else 1349 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1350 1351 return 0; 1352 } 1353 1354 1355 static void p2p_set_dev_persistent(struct p2p_device *dev, 1356 int persistent_group) 1357 { 1358 switch (persistent_group) { 1359 case 0: 1360 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP | 1361 P2P_DEV_PREFER_PERSISTENT_RECONN); 1362 break; 1363 case 1: 1364 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP; 1365 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN; 1366 break; 1367 case 2: 1368 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP | 1369 P2P_DEV_PREFER_PERSISTENT_RECONN; 1370 break; 1371 } 1372 } 1373 1374 1375 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr, 1376 enum p2p_wps_method wps_method, 1377 int go_intent, const u8 *own_interface_addr, 1378 unsigned int force_freq, int persistent_group, 1379 const u8 *force_ssid, size_t force_ssid_len, 1380 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id) 1381 { 1382 struct p2p_device *dev; 1383 1384 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR 1385 " GO Intent=%d Intended Interface Address=" MACSTR 1386 " wps_method=%d persistent_group=%d pd_before_go_neg=%d " 1387 "oob_pw_id=%u", 1388 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1389 wps_method, persistent_group, pd_before_go_neg, oob_pw_id); 1390 1391 dev = p2p_get_device(p2p, peer_addr); 1392 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 1393 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR, 1394 MAC2STR(peer_addr)); 1395 return -1; 1396 } 1397 1398 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, 1399 go_intent == 15) < 0) 1400 return -1; 1401 1402 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 1403 if (!(dev->info.dev_capab & 1404 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 1405 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1406 " that is in a group and is not discoverable", 1407 MAC2STR(peer_addr)); 1408 return -1; 1409 } 1410 if (dev->oper_freq <= 0) { 1411 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1412 " with incomplete information", 1413 MAC2STR(peer_addr)); 1414 return -1; 1415 } 1416 1417 /* 1418 * First, try to connect directly. If the peer does not 1419 * acknowledge frames, assume it is sleeping and use device 1420 * discoverability via the GO at that point. 1421 */ 1422 } 1423 1424 p2p->ssid_set = 0; 1425 if (force_ssid) { 1426 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1427 force_ssid, force_ssid_len); 1428 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1429 p2p->ssid_len = force_ssid_len; 1430 p2p->ssid_set = 1; 1431 } 1432 1433 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1434 dev->flags &= ~P2P_DEV_USER_REJECTED; 1435 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 1436 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1437 if (pd_before_go_neg) 1438 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG; 1439 else { 1440 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG; 1441 /* 1442 * Assign dialog token and tie breaker here to use the same 1443 * values in each retry within the same GO Negotiation exchange. 1444 */ 1445 dev->dialog_token++; 1446 if (dev->dialog_token == 0) 1447 dev->dialog_token = 1; 1448 dev->tie_breaker = p2p->next_tie_breaker; 1449 p2p->next_tie_breaker = !p2p->next_tie_breaker; 1450 } 1451 dev->connect_reqs = 0; 1452 dev->go_neg_req_sent = 0; 1453 dev->go_state = UNKNOWN_GO; 1454 p2p_set_dev_persistent(dev, persistent_group); 1455 p2p->go_intent = go_intent; 1456 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1457 1458 if (p2p->state != P2P_IDLE) 1459 p2p_stop_find(p2p); 1460 1461 if (p2p->after_scan_tx) { 1462 /* 1463 * We need to drop the pending frame to avoid issues with the 1464 * new GO Negotiation, e.g., when the pending frame was from a 1465 * previous attempt at starting a GO Negotiation. 1466 */ 1467 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion"); 1468 os_free(p2p->after_scan_tx); 1469 p2p->after_scan_tx = NULL; 1470 } 1471 1472 dev->wps_method = wps_method; 1473 dev->oob_pw_id = oob_pw_id; 1474 dev->status = P2P_SC_SUCCESS; 1475 1476 if (p2p->p2p_scan_running) { 1477 p2p_dbg(p2p, "p2p_scan running - delay connect send"); 1478 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT; 1479 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN); 1480 return 0; 1481 } 1482 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1483 1484 return p2p_connect_send(p2p, dev); 1485 } 1486 1487 1488 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr, 1489 enum p2p_wps_method wps_method, 1490 int go_intent, const u8 *own_interface_addr, 1491 unsigned int force_freq, int persistent_group, 1492 const u8 *force_ssid, size_t force_ssid_len, 1493 unsigned int pref_freq, u16 oob_pw_id) 1494 { 1495 struct p2p_device *dev; 1496 1497 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR 1498 " GO Intent=%d Intended Interface Address=" MACSTR 1499 " wps_method=%d persistent_group=%d oob_pw_id=%u", 1500 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1501 wps_method, persistent_group, oob_pw_id); 1502 1503 dev = p2p_get_device(p2p, peer_addr); 1504 if (dev == NULL) { 1505 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR, 1506 MAC2STR(peer_addr)); 1507 return -1; 1508 } 1509 1510 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent == 1511 15) < 0) 1512 return -1; 1513 1514 p2p->ssid_set = 0; 1515 if (force_ssid) { 1516 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1517 force_ssid, force_ssid_len); 1518 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1519 p2p->ssid_len = force_ssid_len; 1520 p2p->ssid_set = 1; 1521 } 1522 1523 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1524 dev->flags &= ~P2P_DEV_USER_REJECTED; 1525 dev->go_neg_req_sent = 0; 1526 dev->go_state = UNKNOWN_GO; 1527 p2p_set_dev_persistent(dev, persistent_group); 1528 p2p->go_intent = go_intent; 1529 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1530 1531 dev->wps_method = wps_method; 1532 dev->oob_pw_id = oob_pw_id; 1533 dev->status = P2P_SC_SUCCESS; 1534 1535 return 0; 1536 } 1537 1538 1539 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr, 1540 struct p2p_device *dev, struct p2p_message *msg) 1541 { 1542 os_get_reltime(&dev->last_seen); 1543 1544 p2p_copy_wps_info(p2p, dev, 0, msg); 1545 1546 if (msg->listen_channel) { 1547 int freq; 1548 freq = p2p_channel_to_freq(msg->listen_channel[3], 1549 msg->listen_channel[4]); 1550 if (freq < 0) { 1551 p2p_dbg(p2p, "Unknown peer Listen channel: " 1552 "country=%c%c(0x%02x) reg_class=%u channel=%u", 1553 msg->listen_channel[0], 1554 msg->listen_channel[1], 1555 msg->listen_channel[2], 1556 msg->listen_channel[3], 1557 msg->listen_channel[4]); 1558 } else { 1559 p2p_dbg(p2p, "Update peer " MACSTR 1560 " Listen channel: %u -> %u MHz", 1561 MAC2STR(dev->info.p2p_device_addr), 1562 dev->listen_freq, freq); 1563 dev->listen_freq = freq; 1564 } 1565 } 1566 1567 if (msg->wfd_subelems) { 1568 wpabuf_free(dev->info.wfd_subelems); 1569 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems); 1570 } 1571 1572 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 1573 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 1574 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request"); 1575 } else { 1576 p2p_dbg(p2p, "Created device entry based on GO Neg Req: " 1577 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' " 1578 "listen_freq=%d", 1579 MAC2STR(dev->info.p2p_device_addr), 1580 dev->info.dev_capab, dev->info.group_capab, 1581 dev->info.device_name, dev->listen_freq); 1582 } 1583 1584 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY; 1585 1586 if (dev->flags & P2P_DEV_USER_REJECTED) { 1587 p2p_dbg(p2p, "Do not report rejected device"); 1588 return; 1589 } 1590 1591 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 1592 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 1593 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 1594 } 1595 1596 1597 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len) 1598 { 1599 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 1600 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2); 1601 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2], 1602 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len); 1603 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len; 1604 } 1605 1606 1607 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params) 1608 { 1609 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len); 1610 p2p_random(params->passphrase, p2p->cfg->passphrase_len); 1611 return 0; 1612 } 1613 1614 1615 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer) 1616 { 1617 struct p2p_go_neg_results res; 1618 int go = peer->go_state == LOCAL_GO; 1619 struct p2p_channels intersection; 1620 int freqs; 1621 size_t i, j; 1622 1623 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)", 1624 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer"); 1625 1626 os_memset(&res, 0, sizeof(res)); 1627 res.role_go = go; 1628 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 1629 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 1630 res.wps_method = peer->wps_method; 1631 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 1632 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 1633 res.persistent_group = 2; 1634 else 1635 res.persistent_group = 1; 1636 } 1637 1638 if (go) { 1639 /* Setup AP mode for WPS provisioning */ 1640 res.freq = p2p_channel_to_freq(p2p->op_reg_class, 1641 p2p->op_channel); 1642 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1643 res.ssid_len = p2p->ssid_len; 1644 p2p_random(res.passphrase, p2p->cfg->passphrase_len); 1645 } else { 1646 res.freq = peer->oper_freq; 1647 if (p2p->ssid_len) { 1648 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1649 res.ssid_len = p2p->ssid_len; 1650 } 1651 } 1652 1653 p2p_channels_dump(p2p, "own channels", &p2p->channels); 1654 p2p_channels_dump(p2p, "peer channels", &peer->channels); 1655 p2p_channels_intersect(&p2p->channels, &peer->channels, 1656 &intersection); 1657 if (go) { 1658 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq); 1659 p2p_channels_dump(p2p, "intersection after no-GO removal", 1660 &intersection); 1661 } 1662 freqs = 0; 1663 for (i = 0; i < intersection.reg_classes; i++) { 1664 struct p2p_reg_class *c = &intersection.reg_class[i]; 1665 if (freqs + 1 == P2P_MAX_CHANNELS) 1666 break; 1667 for (j = 0; j < c->channels; j++) { 1668 int freq; 1669 if (freqs + 1 == P2P_MAX_CHANNELS) 1670 break; 1671 freq = p2p_channel_to_freq(c->reg_class, c->channel[j]); 1672 if (freq < 0) 1673 continue; 1674 res.freq_list[freqs++] = freq; 1675 } 1676 } 1677 1678 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout; 1679 1680 p2p_clear_timeout(p2p); 1681 p2p->ssid_set = 0; 1682 peer->go_neg_req_sent = 0; 1683 peer->wps_method = WPS_NOT_READY; 1684 peer->oob_pw_id = 0; 1685 wpabuf_free(peer->go_neg_conf); 1686 peer->go_neg_conf = NULL; 1687 1688 p2p_set_state(p2p, P2P_PROVISIONING); 1689 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 1690 } 1691 1692 1693 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa, 1694 const u8 *data, size_t len, int rx_freq) 1695 { 1696 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa)); 1697 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len); 1698 1699 if (len < 1) 1700 return; 1701 1702 switch (data[0]) { 1703 case P2P_GO_NEG_REQ: 1704 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq); 1705 break; 1706 case P2P_GO_NEG_RESP: 1707 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq); 1708 break; 1709 case P2P_GO_NEG_CONF: 1710 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1); 1711 break; 1712 case P2P_INVITATION_REQ: 1713 p2p_process_invitation_req(p2p, sa, data + 1, len - 1, 1714 rx_freq); 1715 break; 1716 case P2P_INVITATION_RESP: 1717 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 1718 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1); 1719 break; 1720 case P2P_PROV_DISC_REQ: 1721 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1722 break; 1723 case P2P_PROV_DISC_RESP: 1724 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1); 1725 break; 1726 case P2P_DEV_DISC_REQ: 1727 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1728 break; 1729 case P2P_DEV_DISC_RESP: 1730 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1); 1731 break; 1732 default: 1733 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d", 1734 data[0]); 1735 break; 1736 } 1737 } 1738 1739 1740 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, 1741 const u8 *sa, const u8 *bssid, const u8 *data, 1742 size_t len, int freq) 1743 { 1744 if (len < 1) 1745 return; 1746 1747 switch (data[0]) { 1748 case WLAN_PA_VENDOR_SPECIFIC: 1749 data++; 1750 len--; 1751 if (len < 4) 1752 return; 1753 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1754 return; 1755 1756 data += 4; 1757 len -= 4; 1758 1759 p2p_rx_p2p_action(p2p, sa, data, len, freq); 1760 break; 1761 case WLAN_PA_GAS_INITIAL_REQ: 1762 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq); 1763 break; 1764 case WLAN_PA_GAS_INITIAL_RESP: 1765 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq); 1766 break; 1767 case WLAN_PA_GAS_COMEBACK_REQ: 1768 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq); 1769 break; 1770 case WLAN_PA_GAS_COMEBACK_RESP: 1771 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq); 1772 break; 1773 } 1774 } 1775 1776 1777 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa, 1778 const u8 *bssid, u8 category, 1779 const u8 *data, size_t len, int freq) 1780 { 1781 if (category == WLAN_ACTION_PUBLIC) { 1782 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq); 1783 return; 1784 } 1785 1786 if (category != WLAN_ACTION_VENDOR_SPECIFIC) 1787 return; 1788 1789 if (len < 4) 1790 return; 1791 1792 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1793 return; 1794 data += 4; 1795 len -= 4; 1796 1797 /* P2P action frame */ 1798 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa)); 1799 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len); 1800 1801 if (len < 1) 1802 return; 1803 switch (data[0]) { 1804 case P2P_NOA: 1805 p2p_dbg(p2p, "Received P2P Action - Notice of Absence"); 1806 /* TODO */ 1807 break; 1808 case P2P_PRESENCE_REQ: 1809 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq); 1810 break; 1811 case P2P_PRESENCE_RESP: 1812 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1); 1813 break; 1814 case P2P_GO_DISC_REQ: 1815 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq); 1816 break; 1817 default: 1818 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]); 1819 break; 1820 } 1821 } 1822 1823 1824 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx) 1825 { 1826 struct p2p_data *p2p = eloop_ctx; 1827 if (p2p->go_neg_peer == NULL) 1828 return; 1829 if (p2p->pending_listen_freq) { 1830 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start"); 1831 p2p->pending_listen_freq = 0; 1832 } 1833 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1834 p2p->go_neg_peer->status = P2P_SC_SUCCESS; 1835 /* 1836 * Set new timeout to make sure a previously set one does not expire 1837 * too quickly while waiting for the GO Negotiation to complete. 1838 */ 1839 p2p_set_timeout(p2p, 0, 500000); 1840 p2p_connect_send(p2p, p2p->go_neg_peer); 1841 } 1842 1843 1844 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx) 1845 { 1846 struct p2p_data *p2p = eloop_ctx; 1847 if (p2p->invite_peer == NULL) 1848 return; 1849 if (p2p->pending_listen_freq) { 1850 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start"); 1851 p2p->pending_listen_freq = 0; 1852 } 1853 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1854 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr, 1855 p2p->invite_dev_pw_id); 1856 } 1857 1858 1859 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr, 1860 const u8 *ie, size_t ie_len) 1861 { 1862 struct p2p_message msg; 1863 struct p2p_device *dev; 1864 1865 os_memset(&msg, 0, sizeof(msg)); 1866 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL) 1867 { 1868 p2p_parse_free(&msg); 1869 return; /* not a P2P probe */ 1870 } 1871 1872 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 1873 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 1874 != 0) { 1875 /* The Probe Request is not part of P2P Device Discovery. It is 1876 * not known whether the source address of the frame is the P2P 1877 * Device Address or P2P Interface Address. Do not add a new 1878 * peer entry based on this frames. 1879 */ 1880 p2p_parse_free(&msg); 1881 return; 1882 } 1883 1884 dev = p2p_get_device(p2p, addr); 1885 if (dev) { 1886 if (dev->country[0] == 0 && msg.listen_channel) 1887 os_memcpy(dev->country, msg.listen_channel, 3); 1888 os_get_reltime(&dev->last_seen); 1889 p2p_parse_free(&msg); 1890 return; /* already known */ 1891 } 1892 1893 dev = p2p_create_device(p2p, addr); 1894 if (dev == NULL) { 1895 p2p_parse_free(&msg); 1896 return; 1897 } 1898 1899 os_get_reltime(&dev->last_seen); 1900 dev->flags |= P2P_DEV_PROBE_REQ_ONLY; 1901 1902 if (msg.listen_channel) { 1903 os_memcpy(dev->country, msg.listen_channel, 3); 1904 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3], 1905 msg.listen_channel[4]); 1906 } 1907 1908 p2p_copy_wps_info(p2p, dev, 1, &msg); 1909 1910 if (msg.wfd_subelems) { 1911 wpabuf_free(dev->info.wfd_subelems); 1912 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 1913 } 1914 1915 p2p_parse_free(&msg); 1916 1917 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR 1918 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d", 1919 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab, 1920 dev->info.group_capab, dev->info.device_name, 1921 dev->listen_freq); 1922 } 1923 1924 1925 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p, 1926 const u8 *addr, 1927 struct p2p_message *msg) 1928 { 1929 struct p2p_device *dev; 1930 1931 dev = p2p_get_device(p2p, addr); 1932 if (dev) { 1933 os_get_reltime(&dev->last_seen); 1934 return dev; /* already known */ 1935 } 1936 1937 dev = p2p_create_device(p2p, addr); 1938 if (dev == NULL) 1939 return NULL; 1940 1941 p2p_add_dev_info(p2p, addr, dev, msg); 1942 1943 return dev; 1944 } 1945 1946 1947 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type) 1948 { 1949 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0) 1950 return 1; 1951 if (os_memcmp(dev_type, req_dev_type, 2) == 0 && 1952 WPA_GET_BE32(&req_dev_type[2]) == 0 && 1953 WPA_GET_BE16(&req_dev_type[6]) == 0) 1954 return 1; /* Category match with wildcard OUI/sub-category */ 1955 return 0; 1956 } 1957 1958 1959 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[], 1960 size_t num_req_dev_type) 1961 { 1962 size_t i; 1963 for (i = 0; i < num_req_dev_type; i++) { 1964 if (dev_type_match(dev_type, req_dev_type[i])) 1965 return 1; 1966 } 1967 return 0; 1968 } 1969 1970 1971 /** 1972 * p2p_match_dev_type - Match local device type with requested type 1973 * @p2p: P2P module context from p2p_init() 1974 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) 1975 * Returns: 1 on match, 0 on mismatch 1976 * 1977 * This function can be used to match the Requested Device Type attribute in 1978 * WPS IE with the local device types for deciding whether to reply to a Probe 1979 * Request frame. 1980 */ 1981 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps) 1982 { 1983 struct wps_parse_attr attr; 1984 size_t i; 1985 1986 if (wps_parse_msg(wps, &attr)) 1987 return 1; /* assume no Requested Device Type attributes */ 1988 1989 if (attr.num_req_dev_type == 0) 1990 return 1; /* no Requested Device Type attributes -> match */ 1991 1992 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type, 1993 attr.num_req_dev_type)) 1994 return 1; /* Own Primary Device Type matches */ 1995 1996 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) 1997 if (dev_type_list_match(p2p->cfg->sec_dev_type[i], 1998 attr.req_dev_type, 1999 attr.num_req_dev_type)) 2000 return 1; /* Own Secondary Device Type matches */ 2001 2002 /* No matching device type found */ 2003 return 0; 2004 } 2005 2006 2007 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p) 2008 { 2009 struct wpabuf *buf; 2010 u8 *len; 2011 int pw_id = -1; 2012 size_t extra = 0; 2013 2014 #ifdef CONFIG_WIFI_DISPLAY 2015 if (p2p->wfd_ie_probe_resp) 2016 extra = wpabuf_len(p2p->wfd_ie_probe_resp); 2017 #endif /* CONFIG_WIFI_DISPLAY */ 2018 2019 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]) 2020 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]); 2021 2022 buf = wpabuf_alloc(1000 + extra); 2023 if (buf == NULL) 2024 return NULL; 2025 2026 if (p2p->go_neg_peer) { 2027 /* Advertise immediate availability of WPS credential */ 2028 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method); 2029 } 2030 2031 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) { 2032 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response"); 2033 wpabuf_free(buf); 2034 return NULL; 2035 } 2036 2037 #ifdef CONFIG_WIFI_DISPLAY 2038 if (p2p->wfd_ie_probe_resp) 2039 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp); 2040 #endif /* CONFIG_WIFI_DISPLAY */ 2041 2042 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]) 2043 wpabuf_put_buf(buf, 2044 p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]); 2045 2046 /* P2P IE */ 2047 len = p2p_buf_add_ie_hdr(buf); 2048 p2p_buf_add_capability(buf, p2p->dev_capab & 2049 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2050 if (p2p->ext_listen_interval) 2051 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 2052 p2p->ext_listen_interval); 2053 p2p_buf_add_device_info(buf, p2p, NULL); 2054 p2p_buf_update_ie_hdr(buf, len); 2055 2056 return buf; 2057 } 2058 2059 2060 static enum p2p_probe_req_status 2061 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2062 const u8 *bssid, const u8 *ie, size_t ie_len) 2063 { 2064 struct ieee802_11_elems elems; 2065 struct wpabuf *buf; 2066 struct ieee80211_mgmt *resp; 2067 struct p2p_message msg; 2068 struct wpabuf *ies; 2069 2070 if (!p2p->in_listen || !p2p->drv_in_listen) { 2071 /* not in Listen state - ignore Probe Request */ 2072 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request", 2073 p2p->in_listen, p2p->drv_in_listen); 2074 return P2P_PREQ_NOT_LISTEN; 2075 } 2076 2077 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) == 2078 ParseFailed) { 2079 /* Ignore invalid Probe Request frames */ 2080 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it"); 2081 return P2P_PREQ_MALFORMED; 2082 } 2083 2084 if (elems.p2p == NULL) { 2085 /* not a P2P probe - ignore it */ 2086 p2p_dbg(p2p, "Not a P2P probe - ignore it"); 2087 return P2P_PREQ_NOT_P2P; 2088 } 2089 2090 if (dst && !is_broadcast_ether_addr(dst) && 2091 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2092 /* Not sent to the broadcast address or our P2P Device Address 2093 */ 2094 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it", 2095 MAC2STR(dst)); 2096 return P2P_PREQ_NOT_PROCESSED; 2097 } 2098 2099 if (bssid && !is_broadcast_ether_addr(bssid)) { 2100 /* Not sent to the Wildcard BSSID */ 2101 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it", 2102 MAC2STR(bssid)); 2103 return P2P_PREQ_NOT_PROCESSED; 2104 } 2105 2106 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN || 2107 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) != 2108 0) { 2109 /* not using P2P Wildcard SSID - ignore */ 2110 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it"); 2111 return P2P_PREQ_NOT_PROCESSED; 2112 } 2113 2114 if (supp_rates_11b_only(&elems)) { 2115 /* Indicates support for 11b rates only */ 2116 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it"); 2117 return P2P_PREQ_NOT_P2P; 2118 } 2119 2120 os_memset(&msg, 0, sizeof(msg)); 2121 if (p2p_parse_ies(ie, ie_len, &msg) < 0) { 2122 /* Could not parse P2P attributes */ 2123 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it"); 2124 return P2P_PREQ_NOT_P2P; 2125 } 2126 2127 if (msg.device_id && 2128 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2129 /* Device ID did not match */ 2130 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it", 2131 MAC2STR(msg.device_id)); 2132 p2p_parse_free(&msg); 2133 return P2P_PREQ_NOT_PROCESSED; 2134 } 2135 2136 /* Check Requested Device Type match */ 2137 if (msg.wps_attributes && 2138 !p2p_match_dev_type(p2p, msg.wps_attributes)) { 2139 /* No match with Requested Device Type */ 2140 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it"); 2141 p2p_parse_free(&msg); 2142 return P2P_PREQ_NOT_PROCESSED; 2143 } 2144 p2p_parse_free(&msg); 2145 2146 if (!p2p->cfg->send_probe_resp) { 2147 /* Response generated elsewhere */ 2148 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response"); 2149 return P2P_PREQ_NOT_PROCESSED; 2150 } 2151 2152 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state"); 2153 2154 /* 2155 * We do not really have a specific BSS that this frame is advertising, 2156 * so build a frame that has some information in valid format. This is 2157 * really only used for discovery purposes, not to learn exact BSS 2158 * parameters. 2159 */ 2160 ies = p2p_build_probe_resp_ies(p2p); 2161 if (ies == NULL) 2162 return P2P_PREQ_NOT_PROCESSED; 2163 2164 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 2165 if (buf == NULL) { 2166 wpabuf_free(ies); 2167 return P2P_PREQ_NOT_PROCESSED; 2168 } 2169 2170 resp = NULL; 2171 resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp); 2172 2173 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 2174 (WLAN_FC_STYPE_PROBE_RESP << 4)); 2175 os_memcpy(resp->da, addr, ETH_ALEN); 2176 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN); 2177 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN); 2178 resp->u.probe_resp.beacon_int = host_to_le16(100); 2179 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 2180 resp->u.probe_resp.capab_info = 2181 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE | 2182 WLAN_CAPABILITY_PRIVACY | 2183 WLAN_CAPABILITY_SHORT_SLOT_TIME); 2184 2185 wpabuf_put_u8(buf, WLAN_EID_SSID); 2186 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN); 2187 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 2188 2189 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES); 2190 wpabuf_put_u8(buf, 8); 2191 wpabuf_put_u8(buf, (60 / 5) | 0x80); 2192 wpabuf_put_u8(buf, 90 / 5); 2193 wpabuf_put_u8(buf, (120 / 5) | 0x80); 2194 wpabuf_put_u8(buf, 180 / 5); 2195 wpabuf_put_u8(buf, (240 / 5) | 0x80); 2196 wpabuf_put_u8(buf, 360 / 5); 2197 wpabuf_put_u8(buf, 480 / 5); 2198 wpabuf_put_u8(buf, 540 / 5); 2199 2200 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS); 2201 wpabuf_put_u8(buf, 1); 2202 wpabuf_put_u8(buf, p2p->cfg->channel); 2203 2204 wpabuf_put_buf(buf, ies); 2205 wpabuf_free(ies); 2206 2207 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf); 2208 2209 wpabuf_free(buf); 2210 2211 return P2P_PREQ_NOT_PROCESSED; 2212 } 2213 2214 2215 enum p2p_probe_req_status 2216 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2217 const u8 *bssid, const u8 *ie, size_t ie_len) 2218 { 2219 enum p2p_probe_req_status res; 2220 2221 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len); 2222 2223 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len); 2224 2225 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) && 2226 p2p->go_neg_peer && 2227 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN) 2228 == 0 && 2229 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 2230 /* Received a Probe Request from GO Negotiation peer */ 2231 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout"); 2232 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2233 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL); 2234 return P2P_PREQ_PROCESSED; 2235 } 2236 2237 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) && 2238 p2p->invite_peer && 2239 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) && 2240 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN) 2241 == 0) { 2242 /* Received a Probe Request from Invite peer */ 2243 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout"); 2244 eloop_cancel_timeout(p2p_invite_start, p2p, NULL); 2245 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL); 2246 return P2P_PREQ_PROCESSED; 2247 } 2248 2249 return res; 2250 } 2251 2252 2253 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid, 2254 u8 *buf, size_t len, struct wpabuf *p2p_ie) 2255 { 2256 struct wpabuf *tmp; 2257 u8 *lpos; 2258 size_t tmplen; 2259 int res; 2260 u8 group_capab; 2261 2262 if (p2p_ie == NULL) 2263 return 0; /* WLAN AP is not a P2P manager */ 2264 2265 /* 2266 * (Re)Association Request - P2P IE 2267 * P2P Capability attribute (shall be present) 2268 * P2P Interface attribute (present if concurrent device and 2269 * P2P Management is enabled) 2270 */ 2271 tmp = wpabuf_alloc(200); 2272 if (tmp == NULL) 2273 return -1; 2274 2275 lpos = p2p_buf_add_ie_hdr(tmp); 2276 group_capab = 0; 2277 if (p2p->num_groups > 0) { 2278 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; 2279 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2280 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) && 2281 p2p->cross_connect) 2282 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 2283 } 2284 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab); 2285 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2286 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED)) 2287 p2p_buf_add_p2p_interface(tmp, p2p); 2288 p2p_buf_update_ie_hdr(tmp, lpos); 2289 2290 tmplen = wpabuf_len(tmp); 2291 if (tmplen > len) 2292 res = -1; 2293 else { 2294 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2295 res = tmplen; 2296 } 2297 wpabuf_free(tmp); 2298 2299 return res; 2300 } 2301 2302 2303 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf, 2304 size_t len, int p2p_group, struct wpabuf *p2p_ie) 2305 { 2306 struct wpabuf *tmp; 2307 u8 *lpos; 2308 struct p2p_device *peer; 2309 size_t tmplen; 2310 int res; 2311 size_t extra = 0; 2312 2313 if (!p2p_group) 2314 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie); 2315 2316 #ifdef CONFIG_WIFI_DISPLAY 2317 if (p2p->wfd_ie_assoc_req) 2318 extra = wpabuf_len(p2p->wfd_ie_assoc_req); 2319 #endif /* CONFIG_WIFI_DISPLAY */ 2320 2321 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]) 2322 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]); 2323 2324 /* 2325 * (Re)Association Request - P2P IE 2326 * P2P Capability attribute (shall be present) 2327 * Extended Listen Timing (may be present) 2328 * P2P Device Info attribute (shall be present) 2329 */ 2330 tmp = wpabuf_alloc(200 + extra); 2331 if (tmp == NULL) 2332 return -1; 2333 2334 #ifdef CONFIG_WIFI_DISPLAY 2335 if (p2p->wfd_ie_assoc_req) 2336 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req); 2337 #endif /* CONFIG_WIFI_DISPLAY */ 2338 2339 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]) 2340 wpabuf_put_buf(tmp, 2341 p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]); 2342 2343 peer = bssid ? p2p_get_device(p2p, bssid) : NULL; 2344 2345 lpos = p2p_buf_add_ie_hdr(tmp); 2346 p2p_buf_add_capability(tmp, p2p->dev_capab, 0); 2347 if (p2p->ext_listen_interval) 2348 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period, 2349 p2p->ext_listen_interval); 2350 p2p_buf_add_device_info(tmp, p2p, peer); 2351 p2p_buf_update_ie_hdr(tmp, lpos); 2352 2353 tmplen = wpabuf_len(tmp); 2354 if (tmplen > len) 2355 res = -1; 2356 else { 2357 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2358 res = tmplen; 2359 } 2360 wpabuf_free(tmp); 2361 2362 return res; 2363 } 2364 2365 2366 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) 2367 { 2368 struct wpabuf *p2p_ie; 2369 int ret; 2370 2371 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); 2372 if (p2p_ie == NULL) 2373 return 0; 2374 2375 ret = p2p_attr_text(p2p_ie, buf, end); 2376 wpabuf_free(p2p_ie); 2377 return ret; 2378 } 2379 2380 2381 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr) 2382 { 2383 struct p2p_message msg; 2384 2385 os_memset(&msg, 0, sizeof(msg)); 2386 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 2387 return -1; 2388 2389 if (msg.p2p_device_addr) { 2390 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); 2391 return 0; 2392 } else if (msg.device_id) { 2393 os_memcpy(dev_addr, msg.device_id, ETH_ALEN); 2394 return 0; 2395 } 2396 return -1; 2397 } 2398 2399 2400 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr) 2401 { 2402 struct wpabuf *p2p_ie; 2403 int ret; 2404 2405 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 2406 P2P_IE_VENDOR_TYPE); 2407 if (p2p_ie == NULL) 2408 return -1; 2409 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr); 2410 wpabuf_free(p2p_ie); 2411 return ret; 2412 } 2413 2414 2415 static void p2p_clear_go_neg(struct p2p_data *p2p) 2416 { 2417 p2p->go_neg_peer = NULL; 2418 p2p_clear_timeout(p2p); 2419 p2p_set_state(p2p, P2P_IDLE); 2420 } 2421 2422 2423 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr) 2424 { 2425 if (p2p->go_neg_peer == NULL) { 2426 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification"); 2427 return; /* No pending Group Formation */ 2428 } 2429 2430 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) != 2431 0) { 2432 p2p_dbg(p2p, "Ignore WPS registration success notification for " 2433 MACSTR " (GO Negotiation peer " MACSTR ")", 2434 MAC2STR(mac_addr), 2435 MAC2STR(p2p->go_neg_peer->intended_addr)); 2436 return; /* Ignore unexpected peer address */ 2437 } 2438 2439 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR, 2440 MAC2STR(mac_addr)); 2441 2442 p2p_clear_go_neg(p2p); 2443 } 2444 2445 2446 void p2p_group_formation_failed(struct p2p_data *p2p) 2447 { 2448 if (p2p->go_neg_peer == NULL) { 2449 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification"); 2450 return; /* No pending Group Formation */ 2451 } 2452 2453 p2p_dbg(p2p, "Group Formation failed with " MACSTR, 2454 MAC2STR(p2p->go_neg_peer->intended_addr)); 2455 2456 p2p_clear_go_neg(p2p); 2457 } 2458 2459 2460 struct p2p_data * p2p_init(const struct p2p_config *cfg) 2461 { 2462 struct p2p_data *p2p; 2463 2464 if (cfg->max_peers < 1 || 2465 cfg->passphrase_len < 8 || cfg->passphrase_len > 63) 2466 return NULL; 2467 2468 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg)); 2469 if (p2p == NULL) 2470 return NULL; 2471 p2p->cfg = (struct p2p_config *) (p2p + 1); 2472 os_memcpy(p2p->cfg, cfg, sizeof(*cfg)); 2473 if (cfg->dev_name) 2474 p2p->cfg->dev_name = os_strdup(cfg->dev_name); 2475 if (cfg->manufacturer) 2476 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer); 2477 if (cfg->model_name) 2478 p2p->cfg->model_name = os_strdup(cfg->model_name); 2479 if (cfg->model_number) 2480 p2p->cfg->model_number = os_strdup(cfg->model_number); 2481 if (cfg->serial_number) 2482 p2p->cfg->serial_number = os_strdup(cfg->serial_number); 2483 if (cfg->pref_chan) { 2484 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan * 2485 sizeof(struct p2p_channel)); 2486 if (p2p->cfg->pref_chan) { 2487 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan, 2488 cfg->num_pref_chan * 2489 sizeof(struct p2p_channel)); 2490 } else 2491 p2p->cfg->num_pref_chan = 0; 2492 } 2493 2494 p2p->min_disc_int = 1; 2495 p2p->max_disc_int = 3; 2496 p2p->max_disc_tu = -1; 2497 2498 if (os_get_random(&p2p->next_tie_breaker, 1) < 0) 2499 p2p->next_tie_breaker = 0; 2500 p2p->next_tie_breaker &= 0x01; 2501 if (cfg->sd_request) 2502 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 2503 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE; 2504 if (cfg->concurrent_operations) 2505 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER; 2506 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 2507 2508 dl_list_init(&p2p->devices); 2509 2510 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 2511 p2p_expiration_timeout, p2p, NULL); 2512 2513 p2p->go_timeout = 100; 2514 p2p->client_timeout = 20; 2515 p2p->num_p2p_sd_queries = 0; 2516 2517 p2p_dbg(p2p, "initialized"); 2518 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 2519 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 2520 2521 return p2p; 2522 } 2523 2524 2525 void p2p_deinit(struct p2p_data *p2p) 2526 { 2527 #ifdef CONFIG_WIFI_DISPLAY 2528 wpabuf_free(p2p->wfd_ie_beacon); 2529 wpabuf_free(p2p->wfd_ie_probe_req); 2530 wpabuf_free(p2p->wfd_ie_probe_resp); 2531 wpabuf_free(p2p->wfd_ie_assoc_req); 2532 wpabuf_free(p2p->wfd_ie_invitation); 2533 wpabuf_free(p2p->wfd_ie_prov_disc_req); 2534 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 2535 wpabuf_free(p2p->wfd_ie_go_neg); 2536 wpabuf_free(p2p->wfd_dev_info); 2537 wpabuf_free(p2p->wfd_assoc_bssid); 2538 wpabuf_free(p2p->wfd_coupled_sink_info); 2539 #endif /* CONFIG_WIFI_DISPLAY */ 2540 2541 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL); 2542 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 2543 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2544 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2545 p2p_flush(p2p); 2546 p2p_free_req_dev_types(p2p); 2547 os_free(p2p->cfg->dev_name); 2548 os_free(p2p->cfg->manufacturer); 2549 os_free(p2p->cfg->model_name); 2550 os_free(p2p->cfg->model_number); 2551 os_free(p2p->cfg->serial_number); 2552 os_free(p2p->cfg->pref_chan); 2553 os_free(p2p->groups); 2554 wpabuf_free(p2p->sd_resp); 2555 os_free(p2p->after_scan_tx); 2556 p2p_remove_wps_vendor_extensions(p2p); 2557 os_free(p2p->no_go_freq.range); 2558 os_free(p2p); 2559 } 2560 2561 2562 void p2p_flush(struct p2p_data *p2p) 2563 { 2564 struct p2p_device *dev, *prev; 2565 p2p_stop_find(p2p); 2566 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device, 2567 list) { 2568 dl_list_del(&dev->list); 2569 p2p_device_free(p2p, dev); 2570 } 2571 p2p_free_sd_queries(p2p); 2572 os_free(p2p->after_scan_tx); 2573 p2p->after_scan_tx = NULL; 2574 } 2575 2576 2577 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr) 2578 { 2579 struct p2p_device *dev; 2580 2581 dev = p2p_get_device(p2p, addr); 2582 if (dev == NULL) 2583 return -1; 2584 2585 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr)); 2586 2587 if (p2p->go_neg_peer == dev) 2588 p2p->go_neg_peer = NULL; 2589 2590 dev->wps_method = WPS_NOT_READY; 2591 dev->oob_pw_id = 0; 2592 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 2593 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 2594 2595 /* Check if after_scan_tx is for this peer. If so free it */ 2596 if (p2p->after_scan_tx && 2597 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) { 2598 os_free(p2p->after_scan_tx); 2599 p2p->after_scan_tx = NULL; 2600 } 2601 2602 return 0; 2603 } 2604 2605 2606 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name) 2607 { 2608 os_free(p2p->cfg->dev_name); 2609 if (dev_name) { 2610 p2p->cfg->dev_name = os_strdup(dev_name); 2611 if (p2p->cfg->dev_name == NULL) 2612 return -1; 2613 } else 2614 p2p->cfg->dev_name = NULL; 2615 return 0; 2616 } 2617 2618 2619 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer) 2620 { 2621 os_free(p2p->cfg->manufacturer); 2622 p2p->cfg->manufacturer = NULL; 2623 if (manufacturer) { 2624 p2p->cfg->manufacturer = os_strdup(manufacturer); 2625 if (p2p->cfg->manufacturer == NULL) 2626 return -1; 2627 } 2628 2629 return 0; 2630 } 2631 2632 2633 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name) 2634 { 2635 os_free(p2p->cfg->model_name); 2636 p2p->cfg->model_name = NULL; 2637 if (model_name) { 2638 p2p->cfg->model_name = os_strdup(model_name); 2639 if (p2p->cfg->model_name == NULL) 2640 return -1; 2641 } 2642 2643 return 0; 2644 } 2645 2646 2647 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number) 2648 { 2649 os_free(p2p->cfg->model_number); 2650 p2p->cfg->model_number = NULL; 2651 if (model_number) { 2652 p2p->cfg->model_number = os_strdup(model_number); 2653 if (p2p->cfg->model_number == NULL) 2654 return -1; 2655 } 2656 2657 return 0; 2658 } 2659 2660 2661 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number) 2662 { 2663 os_free(p2p->cfg->serial_number); 2664 p2p->cfg->serial_number = NULL; 2665 if (serial_number) { 2666 p2p->cfg->serial_number = os_strdup(serial_number); 2667 if (p2p->cfg->serial_number == NULL) 2668 return -1; 2669 } 2670 2671 return 0; 2672 } 2673 2674 2675 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods) 2676 { 2677 p2p->cfg->config_methods = config_methods; 2678 } 2679 2680 2681 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid) 2682 { 2683 os_memcpy(p2p->cfg->uuid, uuid, 16); 2684 } 2685 2686 2687 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type) 2688 { 2689 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8); 2690 return 0; 2691 } 2692 2693 2694 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8], 2695 size_t num_dev_types) 2696 { 2697 if (num_dev_types > P2P_SEC_DEVICE_TYPES) 2698 num_dev_types = P2P_SEC_DEVICE_TYPES; 2699 p2p->cfg->num_sec_dev_types = num_dev_types; 2700 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8); 2701 return 0; 2702 } 2703 2704 2705 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p) 2706 { 2707 int i; 2708 2709 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2710 wpabuf_free(p2p->wps_vendor_ext[i]); 2711 p2p->wps_vendor_ext[i] = NULL; 2712 } 2713 } 2714 2715 2716 int p2p_add_wps_vendor_extension(struct p2p_data *p2p, 2717 const struct wpabuf *vendor_ext) 2718 { 2719 int i; 2720 2721 if (vendor_ext == NULL) 2722 return -1; 2723 2724 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2725 if (p2p->wps_vendor_ext[i] == NULL) 2726 break; 2727 } 2728 if (i >= P2P_MAX_WPS_VENDOR_EXT) 2729 return -1; 2730 2731 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext); 2732 if (p2p->wps_vendor_ext[i] == NULL) 2733 return -1; 2734 2735 return 0; 2736 } 2737 2738 2739 int p2p_set_country(struct p2p_data *p2p, const char *country) 2740 { 2741 os_memcpy(p2p->cfg->country, country, 3); 2742 return 0; 2743 } 2744 2745 2746 void p2p_continue_find(struct p2p_data *p2p) 2747 { 2748 struct p2p_device *dev; 2749 p2p_set_state(p2p, P2P_SEARCH); 2750 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2751 if (dev->sd_pending_bcast_queries == 0) { 2752 /* Initialize with total number of registered broadcast 2753 * SD queries. */ 2754 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries; 2755 } 2756 2757 if (p2p_start_sd(p2p, dev) == 0) 2758 return; 2759 if (dev->req_config_methods && 2760 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) { 2761 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 2762 MACSTR " (config methods 0x%x)", 2763 MAC2STR(dev->info.p2p_device_addr), 2764 dev->req_config_methods); 2765 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0) 2766 return; 2767 } 2768 } 2769 2770 p2p_listen_in_find(p2p, 1); 2771 } 2772 2773 2774 static void p2p_sd_cb(struct p2p_data *p2p, int success) 2775 { 2776 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d", 2777 success); 2778 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2779 2780 if (!success) { 2781 p2p->sd_peer = NULL; 2782 p2p_continue_find(p2p); 2783 return; 2784 } 2785 2786 if (p2p->sd_peer == NULL) { 2787 p2p_dbg(p2p, "No SD peer entry known"); 2788 p2p_continue_find(p2p); 2789 return; 2790 } 2791 2792 if (p2p->sd_query->for_all_peers) { 2793 /* Update the pending broadcast SD query count for this device 2794 */ 2795 p2p->sd_peer->sd_pending_bcast_queries--; 2796 2797 /* 2798 * If there are no pending broadcast queries for this device, 2799 * mark it as done (-1). 2800 */ 2801 if (p2p->sd_peer->sd_pending_bcast_queries == 0) 2802 p2p->sd_peer->sd_pending_bcast_queries = -1; 2803 } 2804 2805 /* Wait for response from the peer */ 2806 p2p_set_state(p2p, P2P_SD_DURING_FIND); 2807 p2p_set_timeout(p2p, 0, 200000); 2808 } 2809 2810 2811 /** 2812 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state 2813 * @p2p: P2P module context from p2p_init() 2814 */ 2815 static void p2p_retry_pd(struct p2p_data *p2p) 2816 { 2817 struct p2p_device *dev; 2818 2819 if (p2p->state != P2P_IDLE) 2820 return; 2821 2822 /* 2823 * Retry the prov disc req attempt only for the peer that the user had 2824 * requested. 2825 */ 2826 2827 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2828 if (os_memcmp(p2p->pending_pd_devaddr, 2829 dev->info.p2p_device_addr, ETH_ALEN) != 0) 2830 continue; 2831 if (!dev->req_config_methods) 2832 continue; 2833 2834 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 2835 MACSTR " (config methods 0x%x)", 2836 MAC2STR(dev->info.p2p_device_addr), 2837 dev->req_config_methods); 2838 p2p_send_prov_disc_req(p2p, dev, 2839 dev->flags & P2P_DEV_PD_FOR_JOIN, 2840 p2p->pd_force_freq); 2841 return; 2842 } 2843 } 2844 2845 2846 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success) 2847 { 2848 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d", 2849 success); 2850 2851 /* 2852 * Postpone resetting the pending action state till after we actually 2853 * time out. This allows us to take some action like notifying any 2854 * interested parties about no response to the request. 2855 * 2856 * When the timer (below) goes off we check in IDLE, SEARCH, or 2857 * LISTEN_ONLY state, which are the only allowed states to issue a PD 2858 * requests in, if this was still pending and then raise notification. 2859 */ 2860 2861 if (!success) { 2862 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2863 2864 if (p2p->user_initiated_pd && 2865 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY)) 2866 { 2867 /* Retry request from timeout to avoid busy loops */ 2868 p2p->pending_action_state = P2P_PENDING_PD; 2869 p2p_set_timeout(p2p, 0, 50000); 2870 } else if (p2p->state != P2P_IDLE) 2871 p2p_continue_find(p2p); 2872 else if (p2p->user_initiated_pd) { 2873 p2p->pending_action_state = P2P_PENDING_PD; 2874 p2p_set_timeout(p2p, 0, 300000); 2875 } 2876 return; 2877 } 2878 2879 /* 2880 * This postponing, of resetting pending_action_state, needs to be 2881 * done only for user initiated PD requests and not internal ones. 2882 */ 2883 if (p2p->user_initiated_pd) 2884 p2p->pending_action_state = P2P_PENDING_PD; 2885 else 2886 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2887 2888 /* Wait for response from the peer */ 2889 if (p2p->state == P2P_SEARCH) 2890 p2p_set_state(p2p, P2P_PD_DURING_FIND); 2891 p2p_set_timeout(p2p, 0, 200000); 2892 } 2893 2894 2895 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq, 2896 struct os_reltime *rx_time, int level, const u8 *ies, 2897 size_t ies_len) 2898 { 2899 if (os_reltime_before(rx_time, &p2p->find_start)) { 2900 /* 2901 * The driver may have cached (e.g., in cfg80211 BSS table) the 2902 * scan results for relatively long time. To avoid reporting 2903 * stale information, update P2P peers only based on results 2904 * that have based on frames received after the last p2p_find 2905 * operation was started. 2906 */ 2907 p2p_dbg(p2p, "Ignore old scan result for " MACSTR 2908 " (rx_time=%u.%06u)", 2909 MAC2STR(bssid), (unsigned int) rx_time->sec, 2910 (unsigned int) rx_time->usec); 2911 return 0; 2912 } 2913 2914 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1); 2915 2916 return 0; 2917 } 2918 2919 2920 void p2p_scan_res_handled(struct p2p_data *p2p) 2921 { 2922 if (!p2p->p2p_scan_running) { 2923 p2p_dbg(p2p, "p2p_scan was not running, but scan results received"); 2924 } 2925 p2p->p2p_scan_running = 0; 2926 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2927 2928 if (p2p_run_after_scan(p2p)) 2929 return; 2930 if (p2p->state == P2P_SEARCH) 2931 p2p_continue_find(p2p); 2932 } 2933 2934 2935 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id) 2936 { 2937 u8 *len; 2938 2939 #ifdef CONFIG_WIFI_DISPLAY 2940 if (p2p->wfd_ie_probe_req) 2941 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req); 2942 #endif /* CONFIG_WIFI_DISPLAY */ 2943 2944 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]) 2945 wpabuf_put_buf(ies, 2946 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]); 2947 2948 len = p2p_buf_add_ie_hdr(ies); 2949 p2p_buf_add_capability(ies, p2p->dev_capab & 2950 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2951 if (dev_id) 2952 p2p_buf_add_device_id(ies, dev_id); 2953 if (p2p->cfg->reg_class && p2p->cfg->channel) 2954 p2p_buf_add_listen_channel(ies, p2p->cfg->country, 2955 p2p->cfg->reg_class, 2956 p2p->cfg->channel); 2957 if (p2p->ext_listen_interval) 2958 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period, 2959 p2p->ext_listen_interval); 2960 /* TODO: p2p_buf_add_operating_channel() if GO */ 2961 p2p_buf_update_ie_hdr(ies, len); 2962 } 2963 2964 2965 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p) 2966 { 2967 size_t len = 100; 2968 2969 #ifdef CONFIG_WIFI_DISPLAY 2970 if (p2p && p2p->wfd_ie_probe_req) 2971 len += wpabuf_len(p2p->wfd_ie_probe_req); 2972 #endif /* CONFIG_WIFI_DISPLAY */ 2973 2974 if (p2p && p2p->vendor_elem && 2975 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]) 2976 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]); 2977 2978 return len; 2979 } 2980 2981 2982 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end) 2983 { 2984 return p2p_attr_text(p2p_ie, buf, end); 2985 } 2986 2987 2988 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success) 2989 { 2990 struct p2p_device *dev = p2p->go_neg_peer; 2991 int timeout; 2992 2993 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success); 2994 2995 if (dev == NULL) { 2996 p2p_dbg(p2p, "No pending GO Negotiation"); 2997 return; 2998 } 2999 3000 if (success) { 3001 if (dev->flags & P2P_DEV_USER_REJECTED) { 3002 p2p_set_state(p2p, P2P_IDLE); 3003 return; 3004 } 3005 } else if (dev->go_neg_req_sent) { 3006 /* Cancel the increment from p2p_connect_send() on failure */ 3007 dev->go_neg_req_sent--; 3008 } 3009 3010 if (!success && 3011 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) && 3012 !is_zero_ether_addr(dev->member_in_go_dev)) { 3013 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO", 3014 MAC2STR(dev->info.p2p_device_addr)); 3015 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3016 p2p_send_dev_disc_req(p2p, dev); 3017 return; 3018 } 3019 3020 /* 3021 * Use P2P find, if needed, to find the other device from its listen 3022 * channel. 3023 */ 3024 p2p_set_state(p2p, P2P_CONNECT); 3025 timeout = success ? 500000 : 100000; 3026 if (!success && p2p->go_neg_peer && 3027 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) { 3028 unsigned int r; 3029 /* 3030 * Peer is expected to wait our response and we will skip the 3031 * listen phase. Add some randomness to the wait time here to 3032 * make it less likely to hit cases where we could end up in 3033 * sync with peer not listening. 3034 */ 3035 if (os_get_random((u8 *) &r, sizeof(r)) < 0) 3036 r = 0; 3037 timeout += r % 100000; 3038 } 3039 p2p_set_timeout(p2p, 0, timeout); 3040 } 3041 3042 3043 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success) 3044 { 3045 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d", 3046 success); 3047 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) { 3048 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore"); 3049 return; 3050 } 3051 p2p_set_state(p2p, P2P_CONNECT); 3052 p2p_set_timeout(p2p, 0, 500000); 3053 } 3054 3055 3056 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success, 3057 const u8 *addr) 3058 { 3059 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success); 3060 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) { 3061 p2p_go_neg_failed(p2p, p2p->go_neg_peer, 3062 p2p->go_neg_peer->status); 3063 } else if (success) { 3064 struct p2p_device *dev; 3065 dev = p2p_get_device(p2p, addr); 3066 if (dev && 3067 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) { 3068 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE; 3069 if ((p2p->state == P2P_SEARCH) || 3070 (p2p->state == P2P_LISTEN_ONLY)) { 3071 /* Clear our search state or Listen state since 3072 * now peer is awaiting response from our side. 3073 */ 3074 p2p_dbg(p2p, "Clear the P2P discovery state"); 3075 p2p_stop_find(p2p); 3076 } 3077 } 3078 } 3079 } 3080 3081 3082 static void p2p_go_neg_conf_cb(struct p2p_data *p2p, 3083 enum p2p_send_action_result result) 3084 { 3085 struct p2p_device *dev; 3086 3087 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result); 3088 if (result == P2P_SEND_ACTION_FAILED) { 3089 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3090 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3091 return; 3092 } 3093 3094 dev = p2p->go_neg_peer; 3095 3096 if (result == P2P_SEND_ACTION_NO_ACK) { 3097 /* 3098 * Retry GO Negotiation Confirmation 3099 * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive 3100 * ACK for confirmation. 3101 */ 3102 if (dev && dev->go_neg_conf && 3103 dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) { 3104 p2p_dbg(p2p, "GO Negotiation Confirm retry %d", 3105 dev->go_neg_conf_sent); 3106 p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM; 3107 if (p2p_send_action(p2p, dev->go_neg_conf_freq, 3108 dev->info.p2p_device_addr, 3109 p2p->cfg->dev_addr, 3110 dev->info.p2p_device_addr, 3111 wpabuf_head(dev->go_neg_conf), 3112 wpabuf_len(dev->go_neg_conf), 0) >= 3113 0) { 3114 dev->go_neg_conf_sent++; 3115 return; 3116 } 3117 p2p_dbg(p2p, "Failed to re-send Action frame"); 3118 3119 /* 3120 * Continue with the assumption that the first attempt 3121 * went through and just the ACK frame was lost. 3122 */ 3123 } 3124 3125 /* 3126 * It looks like the TX status for GO Negotiation Confirm is 3127 * often showing failure even when the peer has actually 3128 * received the frame. Since the peer may change channels 3129 * immediately after having received the frame, we may not see 3130 * an Ack for retries, so just dropping a single frame may 3131 * trigger this. To allow the group formation to succeed if the 3132 * peer did indeed receive the frame, continue regardless of 3133 * the TX status. 3134 */ 3135 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported"); 3136 } 3137 3138 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3139 3140 if (dev == NULL) 3141 return; 3142 3143 p2p_go_complete(p2p, dev); 3144 } 3145 3146 3147 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 3148 const u8 *src, const u8 *bssid, 3149 enum p2p_send_action_result result) 3150 { 3151 enum p2p_pending_action_state state; 3152 int success; 3153 3154 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR 3155 " src=" MACSTR " bssid=" MACSTR " result=%d", 3156 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), 3157 MAC2STR(bssid), result); 3158 success = result == P2P_SEND_ACTION_SUCCESS; 3159 state = p2p->pending_action_state; 3160 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3161 switch (state) { 3162 case P2P_NO_PENDING_ACTION: 3163 if (p2p->send_action_in_progress) { 3164 p2p->send_action_in_progress = 0; 3165 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3166 } 3167 if (p2p->after_scan_tx_in_progress) { 3168 p2p->after_scan_tx_in_progress = 0; 3169 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING && 3170 p2p_run_after_scan(p2p)) 3171 break; 3172 if (p2p->state == P2P_SEARCH) { 3173 p2p_dbg(p2p, "Continue find after after_scan_tx completion"); 3174 p2p_continue_find(p2p); 3175 } 3176 } 3177 break; 3178 case P2P_PENDING_GO_NEG_REQUEST: 3179 p2p_go_neg_req_cb(p2p, success); 3180 break; 3181 case P2P_PENDING_GO_NEG_RESPONSE: 3182 p2p_go_neg_resp_cb(p2p, success); 3183 break; 3184 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE: 3185 p2p_go_neg_resp_failure_cb(p2p, success, dst); 3186 break; 3187 case P2P_PENDING_GO_NEG_CONFIRM: 3188 p2p_go_neg_conf_cb(p2p, result); 3189 break; 3190 case P2P_PENDING_SD: 3191 p2p_sd_cb(p2p, success); 3192 break; 3193 case P2P_PENDING_PD: 3194 p2p_prov_disc_cb(p2p, success); 3195 break; 3196 case P2P_PENDING_INVITATION_REQUEST: 3197 p2p_invitation_req_cb(p2p, success); 3198 break; 3199 case P2P_PENDING_INVITATION_RESPONSE: 3200 p2p_invitation_resp_cb(p2p, success); 3201 break; 3202 case P2P_PENDING_DEV_DISC_REQUEST: 3203 p2p_dev_disc_req_cb(p2p, success); 3204 break; 3205 case P2P_PENDING_DEV_DISC_RESPONSE: 3206 p2p_dev_disc_resp_cb(p2p, success); 3207 break; 3208 case P2P_PENDING_GO_DISC_REQ: 3209 p2p_go_disc_req_cb(p2p, success); 3210 break; 3211 } 3212 3213 p2p->after_scan_tx_in_progress = 0; 3214 } 3215 3216 3217 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq, 3218 unsigned int duration) 3219 { 3220 if (freq == p2p->pending_client_disc_freq) { 3221 p2p_dbg(p2p, "Client discoverability remain-awake completed"); 3222 p2p->pending_client_disc_freq = 0; 3223 return; 3224 } 3225 3226 if (freq != p2p->pending_listen_freq) { 3227 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)", 3228 freq, duration, p2p->pending_listen_freq); 3229 return; 3230 } 3231 3232 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback", 3233 p2p->pending_listen_sec, p2p->pending_listen_usec, 3234 p2p->pending_listen_freq); 3235 p2p->in_listen = 1; 3236 p2p->drv_in_listen = freq; 3237 if (p2p->pending_listen_sec || p2p->pending_listen_usec) { 3238 /* 3239 * Add 20 msec extra wait to avoid race condition with driver 3240 * remain-on-channel end event, i.e., give driver more time to 3241 * complete the operation before our timeout expires. 3242 */ 3243 p2p_set_timeout(p2p, p2p->pending_listen_sec, 3244 p2p->pending_listen_usec + 20000); 3245 } 3246 3247 p2p->pending_listen_freq = 0; 3248 } 3249 3250 3251 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq) 3252 { 3253 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq); 3254 p2p->drv_in_listen = 0; 3255 if (p2p->in_listen) 3256 return 0; /* Internal timeout will trigger the next step */ 3257 3258 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) { 3259 if (p2p->go_neg_peer->connect_reqs >= 120) { 3260 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3261 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3262 return 0; 3263 } 3264 3265 p2p_set_state(p2p, P2P_CONNECT); 3266 p2p_connect_send(p2p, p2p->go_neg_peer); 3267 return 1; 3268 } else if (p2p->state == P2P_SEARCH) { 3269 if (p2p->p2p_scan_running) { 3270 /* 3271 * Search is already in progress. This can happen if 3272 * an Action frame RX is reported immediately after 3273 * the end of a remain-on-channel operation and the 3274 * response frame to that is sent using an offchannel 3275 * operation while in p2p_find. Avoid an attempt to 3276 * restart a scan here. 3277 */ 3278 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one"); 3279 return 1; 3280 } 3281 if (p2p->pending_listen_freq) { 3282 /* 3283 * Better wait a bit if the driver is unable to start 3284 * offchannel operation for some reason. p2p_search() 3285 * will be started from internal timeout. 3286 */ 3287 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop"); 3288 p2p_set_timeout(p2p, 0, 100000); 3289 return 1; 3290 } 3291 if (p2p->search_delay) { 3292 p2p_dbg(p2p, "Delay search operation by %u ms", 3293 p2p->search_delay); 3294 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3295 (p2p->search_delay % 1000) * 1000); 3296 return 1; 3297 } 3298 p2p_search(p2p); 3299 return 1; 3300 } 3301 3302 return 0; 3303 } 3304 3305 3306 static void p2p_timeout_connect(struct p2p_data *p2p) 3307 { 3308 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3309 if (p2p->go_neg_peer && 3310 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 3311 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed"); 3312 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3313 return; 3314 } 3315 if (p2p->go_neg_peer && 3316 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) && 3317 p2p->go_neg_peer->connect_reqs < 120) { 3318 p2p_dbg(p2p, "Peer expected to wait our response - skip listen"); 3319 p2p_connect_send(p2p, p2p->go_neg_peer); 3320 return; 3321 } 3322 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) { 3323 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)"); 3324 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3325 p2p_set_timeout(p2p, 0, 30000); 3326 return; 3327 } 3328 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3329 p2p_listen_in_find(p2p, 0); 3330 } 3331 3332 3333 static void p2p_timeout_connect_listen(struct p2p_data *p2p) 3334 { 3335 if (p2p->go_neg_peer) { 3336 if (p2p->drv_in_listen) { 3337 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete"); 3338 return; 3339 } 3340 3341 if (p2p->go_neg_peer->connect_reqs >= 120) { 3342 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3343 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3344 return; 3345 } 3346 3347 p2p_set_state(p2p, P2P_CONNECT); 3348 p2p_connect_send(p2p, p2p->go_neg_peer); 3349 } else 3350 p2p_set_state(p2p, P2P_IDLE); 3351 } 3352 3353 3354 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p) 3355 { 3356 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 3357 3358 if (p2p->cfg->is_concurrent_session_active && 3359 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx)) 3360 p2p_set_timeout(p2p, 0, 500000); 3361 else 3362 p2p_set_timeout(p2p, 0, 200000); 3363 } 3364 3365 3366 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p) 3367 { 3368 struct p2p_device *dev = p2p->go_neg_peer; 3369 struct os_reltime now; 3370 3371 if (dev == NULL) { 3372 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait"); 3373 return; 3374 } 3375 3376 os_get_reltime(&now); 3377 if (os_reltime_expired(&now, &dev->go_neg_wait_started, 120)) { 3378 p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation"); 3379 p2p_go_neg_failed(p2p, dev, -1); 3380 return; 3381 } 3382 3383 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation"); 3384 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT); 3385 p2p_listen_in_find(p2p, 0); 3386 } 3387 3388 3389 static void p2p_timeout_sd_during_find(struct p2p_data *p2p) 3390 { 3391 p2p_dbg(p2p, "Service Discovery Query timeout"); 3392 if (p2p->sd_peer) { 3393 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3394 p2p->sd_peer = NULL; 3395 } 3396 p2p_continue_find(p2p); 3397 } 3398 3399 3400 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p) 3401 { 3402 p2p_dbg(p2p, "Provision Discovery Request timeout"); 3403 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3404 p2p_continue_find(p2p); 3405 } 3406 3407 3408 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p) 3409 { 3410 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3411 3412 /* 3413 * For user initiated PD requests that we have not gotten any responses 3414 * for while in IDLE state, we retry them a couple of times before 3415 * giving up. 3416 */ 3417 if (!p2p->user_initiated_pd) 3418 return; 3419 3420 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout"); 3421 3422 if (p2p->pd_retries) { 3423 p2p->pd_retries--; 3424 p2p_retry_pd(p2p); 3425 } else { 3426 struct p2p_device *dev; 3427 int for_join = 0; 3428 3429 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3430 if (os_memcmp(p2p->pending_pd_devaddr, 3431 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3432 continue; 3433 if (dev->req_config_methods && 3434 (dev->flags & P2P_DEV_PD_FOR_JOIN)) 3435 for_join = 1; 3436 } 3437 3438 if (p2p->cfg->prov_disc_fail) 3439 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, 3440 p2p->pending_pd_devaddr, 3441 for_join ? 3442 P2P_PROV_DISC_TIMEOUT_JOIN : 3443 P2P_PROV_DISC_TIMEOUT); 3444 p2p_reset_pending_pd(p2p); 3445 } 3446 } 3447 3448 3449 static void p2p_timeout_invite(struct p2p_data *p2p) 3450 { 3451 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3452 p2p_set_state(p2p, P2P_INVITE_LISTEN); 3453 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 3454 /* 3455 * Better remain on operating channel instead of listen channel 3456 * when running a group. 3457 */ 3458 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel"); 3459 p2p_set_timeout(p2p, 0, 100000); 3460 return; 3461 } 3462 p2p_listen_in_find(p2p, 0); 3463 } 3464 3465 3466 static void p2p_timeout_invite_listen(struct p2p_data *p2p) 3467 { 3468 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) { 3469 p2p_set_state(p2p, P2P_INVITE); 3470 p2p_invite_send(p2p, p2p->invite_peer, 3471 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id); 3472 } else { 3473 if (p2p->invite_peer) { 3474 p2p_dbg(p2p, "Invitation Request retry limit reached"); 3475 if (p2p->cfg->invitation_result) 3476 p2p->cfg->invitation_result( 3477 p2p->cfg->cb_ctx, -1, NULL, NULL, 3478 p2p->invite_peer->info.p2p_device_addr, 3479 0, 0); 3480 } 3481 p2p_set_state(p2p, P2P_IDLE); 3482 } 3483 } 3484 3485 3486 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx) 3487 { 3488 struct p2p_data *p2p = eloop_ctx; 3489 3490 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state)); 3491 3492 p2p->in_listen = 0; 3493 3494 switch (p2p->state) { 3495 case P2P_IDLE: 3496 /* Check if we timed out waiting for PD req */ 3497 if (p2p->pending_action_state == P2P_PENDING_PD) 3498 p2p_timeout_prov_disc_req(p2p); 3499 break; 3500 case P2P_SEARCH: 3501 /* Check if we timed out waiting for PD req */ 3502 if (p2p->pending_action_state == P2P_PENDING_PD) 3503 p2p_timeout_prov_disc_req(p2p); 3504 if (p2p->search_delay && !p2p->in_search_delay) { 3505 p2p_dbg(p2p, "Delay search operation by %u ms", 3506 p2p->search_delay); 3507 p2p->in_search_delay = 1; 3508 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3509 (p2p->search_delay % 1000) * 1000); 3510 break; 3511 } 3512 p2p->in_search_delay = 0; 3513 p2p_search(p2p); 3514 break; 3515 case P2P_CONNECT: 3516 p2p_timeout_connect(p2p); 3517 break; 3518 case P2P_CONNECT_LISTEN: 3519 p2p_timeout_connect_listen(p2p); 3520 break; 3521 case P2P_GO_NEG: 3522 break; 3523 case P2P_LISTEN_ONLY: 3524 /* Check if we timed out waiting for PD req */ 3525 if (p2p->pending_action_state == P2P_PENDING_PD) 3526 p2p_timeout_prov_disc_req(p2p); 3527 3528 if (p2p->ext_listen_only) { 3529 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed"); 3530 p2p->ext_listen_only = 0; 3531 p2p_set_state(p2p, P2P_IDLE); 3532 } 3533 break; 3534 case P2P_WAIT_PEER_CONNECT: 3535 p2p_timeout_wait_peer_connect(p2p); 3536 break; 3537 case P2P_WAIT_PEER_IDLE: 3538 p2p_timeout_wait_peer_idle(p2p); 3539 break; 3540 case P2P_SD_DURING_FIND: 3541 p2p_timeout_sd_during_find(p2p); 3542 break; 3543 case P2P_PROVISIONING: 3544 break; 3545 case P2P_PD_DURING_FIND: 3546 p2p_timeout_prov_disc_during_find(p2p); 3547 break; 3548 case P2P_INVITE: 3549 p2p_timeout_invite(p2p); 3550 break; 3551 case P2P_INVITE_LISTEN: 3552 p2p_timeout_invite_listen(p2p); 3553 break; 3554 } 3555 } 3556 3557 3558 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr) 3559 { 3560 struct p2p_device *dev; 3561 3562 dev = p2p_get_device(p2p, peer_addr); 3563 p2p_dbg(p2p, "Local request to reject connection attempts by peer " 3564 MACSTR, MAC2STR(peer_addr)); 3565 if (dev == NULL) { 3566 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr)); 3567 return -1; 3568 } 3569 dev->status = P2P_SC_FAIL_REJECTED_BY_USER; 3570 dev->flags |= P2P_DEV_USER_REJECTED; 3571 return 0; 3572 } 3573 3574 3575 const char * p2p_wps_method_text(enum p2p_wps_method method) 3576 { 3577 switch (method) { 3578 case WPS_NOT_READY: 3579 return "not-ready"; 3580 case WPS_PIN_DISPLAY: 3581 return "Display"; 3582 case WPS_PIN_KEYPAD: 3583 return "Keypad"; 3584 case WPS_PBC: 3585 return "PBC"; 3586 case WPS_NFC: 3587 return "NFC"; 3588 } 3589 3590 return "??"; 3591 } 3592 3593 3594 static const char * p2p_go_state_text(enum p2p_go_state go_state) 3595 { 3596 switch (go_state) { 3597 case UNKNOWN_GO: 3598 return "unknown"; 3599 case LOCAL_GO: 3600 return "local"; 3601 case REMOTE_GO: 3602 return "remote"; 3603 } 3604 3605 return "??"; 3606 } 3607 3608 3609 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p, 3610 const u8 *addr, int next) 3611 { 3612 struct p2p_device *dev; 3613 3614 if (addr) 3615 dev = p2p_get_device(p2p, addr); 3616 else 3617 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 3618 3619 if (dev && next) { 3620 dev = dl_list_first(&dev->list, struct p2p_device, list); 3621 if (&dev->list == &p2p->devices) 3622 dev = NULL; 3623 } 3624 3625 if (dev == NULL) 3626 return NULL; 3627 3628 return &dev->info; 3629 } 3630 3631 3632 int p2p_get_peer_info_txt(const struct p2p_peer_info *info, 3633 char *buf, size_t buflen) 3634 { 3635 struct p2p_device *dev; 3636 int res; 3637 char *pos, *end; 3638 struct os_reltime now; 3639 3640 if (info == NULL) 3641 return -1; 3642 3643 dev = (struct p2p_device *) (((u8 *) info) - 3644 offsetof(struct p2p_device, info)); 3645 3646 pos = buf; 3647 end = buf + buflen; 3648 3649 os_get_reltime(&now); 3650 res = os_snprintf(pos, end - pos, 3651 "age=%d\n" 3652 "listen_freq=%d\n" 3653 "wps_method=%s\n" 3654 "interface_addr=" MACSTR "\n" 3655 "member_in_go_dev=" MACSTR "\n" 3656 "member_in_go_iface=" MACSTR "\n" 3657 "go_neg_req_sent=%d\n" 3658 "go_state=%s\n" 3659 "dialog_token=%u\n" 3660 "intended_addr=" MACSTR "\n" 3661 "country=%c%c\n" 3662 "oper_freq=%d\n" 3663 "req_config_methods=0x%x\n" 3664 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n" 3665 "status=%d\n" 3666 "invitation_reqs=%u\n", 3667 (int) (now.sec - dev->last_seen.sec), 3668 dev->listen_freq, 3669 p2p_wps_method_text(dev->wps_method), 3670 MAC2STR(dev->interface_addr), 3671 MAC2STR(dev->member_in_go_dev), 3672 MAC2STR(dev->member_in_go_iface), 3673 dev->go_neg_req_sent, 3674 p2p_go_state_text(dev->go_state), 3675 dev->dialog_token, 3676 MAC2STR(dev->intended_addr), 3677 dev->country[0] ? dev->country[0] : '_', 3678 dev->country[1] ? dev->country[1] : '_', 3679 dev->oper_freq, 3680 dev->req_config_methods, 3681 dev->flags & P2P_DEV_PROBE_REQ_ONLY ? 3682 "[PROBE_REQ_ONLY]" : "", 3683 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "", 3684 dev->flags & P2P_DEV_NOT_YET_READY ? 3685 "[NOT_YET_READY]" : "", 3686 dev->flags & P2P_DEV_PD_PEER_DISPLAY ? 3687 "[PD_PEER_DISPLAY]" : "", 3688 dev->flags & P2P_DEV_PD_PEER_KEYPAD ? 3689 "[PD_PEER_KEYPAD]" : "", 3690 dev->flags & P2P_DEV_USER_REJECTED ? 3691 "[USER_REJECTED]" : "", 3692 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ? 3693 "[PEER_WAITING_RESPONSE]" : "", 3694 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ? 3695 "[PREFER_PERSISTENT_GROUP]" : "", 3696 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ? 3697 "[WAIT_GO_NEG_RESPONSE]" : "", 3698 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ? 3699 "[WAIT_GO_NEG_CONFIRM]" : "", 3700 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ? 3701 "[GROUP_CLIENT_ONLY]" : "", 3702 dev->flags & P2P_DEV_FORCE_FREQ ? 3703 "[FORCE_FREQ]" : "", 3704 dev->flags & P2P_DEV_PD_FOR_JOIN ? 3705 "[PD_FOR_JOIN]" : "", 3706 dev->status, 3707 dev->invitation_reqs); 3708 if (res < 0 || res >= end - pos) 3709 return pos - buf; 3710 pos += res; 3711 3712 if (dev->ext_listen_period) { 3713 res = os_snprintf(pos, end - pos, 3714 "ext_listen_period=%u\n" 3715 "ext_listen_interval=%u\n", 3716 dev->ext_listen_period, 3717 dev->ext_listen_interval); 3718 if (res < 0 || res >= end - pos) 3719 return pos - buf; 3720 pos += res; 3721 } 3722 3723 if (dev->oper_ssid_len) { 3724 res = os_snprintf(pos, end - pos, 3725 "oper_ssid=%s\n", 3726 wpa_ssid_txt(dev->oper_ssid, 3727 dev->oper_ssid_len)); 3728 if (res < 0 || res >= end - pos) 3729 return pos - buf; 3730 pos += res; 3731 } 3732 3733 #ifdef CONFIG_WIFI_DISPLAY 3734 if (dev->info.wfd_subelems) { 3735 res = os_snprintf(pos, end - pos, "wfd_subelems="); 3736 if (res < 0 || res >= end - pos) 3737 return pos - buf; 3738 pos += res; 3739 3740 pos += wpa_snprintf_hex(pos, end - pos, 3741 wpabuf_head(dev->info.wfd_subelems), 3742 wpabuf_len(dev->info.wfd_subelems)); 3743 3744 res = os_snprintf(pos, end - pos, "\n"); 3745 if (res < 0 || res >= end - pos) 3746 return pos - buf; 3747 pos += res; 3748 } 3749 #endif /* CONFIG_WIFI_DISPLAY */ 3750 3751 return pos - buf; 3752 } 3753 3754 3755 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr) 3756 { 3757 return p2p_get_device(p2p, addr) != NULL; 3758 } 3759 3760 3761 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled) 3762 { 3763 if (enabled) { 3764 p2p_dbg(p2p, "Client discoverability enabled"); 3765 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3766 } else { 3767 p2p_dbg(p2p, "Client discoverability disabled"); 3768 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3769 } 3770 } 3771 3772 3773 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1, 3774 u32 duration2, u32 interval2) 3775 { 3776 struct wpabuf *req; 3777 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL; 3778 u8 *len; 3779 3780 req = wpabuf_alloc(100); 3781 if (req == NULL) 3782 return NULL; 3783 3784 if (duration1 || interval1) { 3785 os_memset(&desc1, 0, sizeof(desc1)); 3786 desc1.count_type = 1; 3787 desc1.duration = duration1; 3788 desc1.interval = interval1; 3789 ptr1 = &desc1; 3790 3791 if (duration2 || interval2) { 3792 os_memset(&desc2, 0, sizeof(desc2)); 3793 desc2.count_type = 2; 3794 desc2.duration = duration2; 3795 desc2.interval = interval2; 3796 ptr2 = &desc2; 3797 } 3798 } 3799 3800 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1); 3801 len = p2p_buf_add_ie_hdr(req); 3802 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2); 3803 p2p_buf_update_ie_hdr(req, len); 3804 3805 return req; 3806 } 3807 3808 3809 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr, 3810 const u8 *own_interface_addr, unsigned int freq, 3811 u32 duration1, u32 interval1, u32 duration2, 3812 u32 interval2) 3813 { 3814 struct wpabuf *req; 3815 3816 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR 3817 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u " 3818 "dur2=%u int2=%u", 3819 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr), 3820 freq, duration1, interval1, duration2, interval2); 3821 3822 req = p2p_build_presence_req(duration1, interval1, duration2, 3823 interval2); 3824 if (req == NULL) 3825 return -1; 3826 3827 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3828 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr, 3829 go_interface_addr, 3830 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 3831 p2p_dbg(p2p, "Failed to send Action frame"); 3832 } 3833 wpabuf_free(req); 3834 3835 return 0; 3836 } 3837 3838 3839 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa, 3840 size_t noa_len, u8 dialog_token) 3841 { 3842 struct wpabuf *resp; 3843 u8 *len; 3844 3845 resp = wpabuf_alloc(100 + noa_len); 3846 if (resp == NULL) 3847 return NULL; 3848 3849 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token); 3850 len = p2p_buf_add_ie_hdr(resp); 3851 p2p_buf_add_status(resp, status); 3852 if (noa) { 3853 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE); 3854 wpabuf_put_le16(resp, noa_len); 3855 wpabuf_put_data(resp, noa, noa_len); 3856 } else 3857 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL); 3858 p2p_buf_update_ie_hdr(resp, len); 3859 3860 return resp; 3861 } 3862 3863 3864 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 3865 const u8 *sa, const u8 *data, size_t len, 3866 int rx_freq) 3867 { 3868 struct p2p_message msg; 3869 u8 status; 3870 struct wpabuf *resp; 3871 size_t g; 3872 struct p2p_group *group = NULL; 3873 int parsed = 0; 3874 u8 noa[50]; 3875 int noa_len; 3876 3877 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request"); 3878 3879 for (g = 0; g < p2p->num_groups; g++) { 3880 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]), 3881 ETH_ALEN) == 0) { 3882 group = p2p->groups[g]; 3883 break; 3884 } 3885 } 3886 if (group == NULL) { 3887 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group " 3888 MACSTR, MAC2STR(da)); 3889 return; 3890 } 3891 3892 if (p2p_parse(data, len, &msg) < 0) { 3893 p2p_dbg(p2p, "Failed to parse P2P Presence Request"); 3894 status = P2P_SC_FAIL_INVALID_PARAMS; 3895 goto fail; 3896 } 3897 parsed = 1; 3898 3899 if (msg.noa == NULL) { 3900 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request"); 3901 status = P2P_SC_FAIL_INVALID_PARAMS; 3902 goto fail; 3903 } 3904 3905 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len); 3906 3907 fail: 3908 if (p2p->cfg->get_noa) 3909 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa, 3910 sizeof(noa)); 3911 else 3912 noa_len = -1; 3913 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL, 3914 noa_len > 0 ? noa_len : 0, 3915 msg.dialog_token); 3916 if (parsed) 3917 p2p_parse_free(&msg); 3918 if (resp == NULL) 3919 return; 3920 3921 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3922 if (p2p_send_action(p2p, rx_freq, sa, da, da, 3923 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 3924 p2p_dbg(p2p, "Failed to send Action frame"); 3925 } 3926 wpabuf_free(resp); 3927 } 3928 3929 3930 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 3931 const u8 *sa, const u8 *data, size_t len) 3932 { 3933 struct p2p_message msg; 3934 3935 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response"); 3936 3937 if (p2p_parse(data, len, &msg) < 0) { 3938 p2p_dbg(p2p, "Failed to parse P2P Presence Response"); 3939 return; 3940 } 3941 3942 if (msg.status == NULL || msg.noa == NULL) { 3943 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response"); 3944 p2p_parse_free(&msg); 3945 return; 3946 } 3947 3948 if (p2p->cfg->presence_resp) { 3949 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status, 3950 msg.noa, msg.noa_len); 3951 } 3952 3953 if (*msg.status) { 3954 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u", 3955 *msg.status); 3956 p2p_parse_free(&msg); 3957 return; 3958 } 3959 3960 p2p_dbg(p2p, "P2P Presence Request was accepted"); 3961 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA", 3962 msg.noa, msg.noa_len); 3963 /* TODO: process NoA */ 3964 p2p_parse_free(&msg); 3965 } 3966 3967 3968 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx) 3969 { 3970 struct p2p_data *p2p = eloop_ctx; 3971 3972 if (p2p->ext_listen_interval) { 3973 /* Schedule next extended listen timeout */ 3974 eloop_register_timeout(p2p->ext_listen_interval_sec, 3975 p2p->ext_listen_interval_usec, 3976 p2p_ext_listen_timeout, p2p, NULL); 3977 } 3978 3979 if ((p2p->cfg->is_p2p_in_progress && 3980 p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) || 3981 (p2p->pending_action_state == P2P_PENDING_PD && 3982 p2p->pd_retries > 0)) { 3983 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)", 3984 p2p_state_txt(p2p->state)); 3985 return; 3986 } 3987 3988 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) { 3989 /* 3990 * This should not really happen, but it looks like the Listen 3991 * command may fail is something else (e.g., a scan) was 3992 * running at an inconvenient time. As a workaround, allow new 3993 * Extended Listen operation to be started. 3994 */ 3995 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again"); 3996 p2p->ext_listen_only = 0; 3997 p2p_set_state(p2p, P2P_IDLE); 3998 } 3999 4000 if (p2p->state != P2P_IDLE) { 4001 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state)); 4002 return; 4003 } 4004 4005 p2p_dbg(p2p, "Extended Listen timeout"); 4006 p2p->ext_listen_only = 1; 4007 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) { 4008 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing"); 4009 p2p->ext_listen_only = 0; 4010 } 4011 } 4012 4013 4014 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period, 4015 unsigned int interval) 4016 { 4017 if (period > 65535 || interval > 65535 || period > interval || 4018 (period == 0 && interval > 0) || (period > 0 && interval == 0)) { 4019 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u", 4020 period, interval); 4021 return -1; 4022 } 4023 4024 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 4025 4026 if (interval == 0) { 4027 p2p_dbg(p2p, "Disabling Extended Listen Timing"); 4028 p2p->ext_listen_period = 0; 4029 p2p->ext_listen_interval = 0; 4030 return 0; 4031 } 4032 4033 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec", 4034 period, interval); 4035 p2p->ext_listen_period = period; 4036 p2p->ext_listen_interval = interval; 4037 p2p->ext_listen_interval_sec = interval / 1000; 4038 p2p->ext_listen_interval_usec = (interval % 1000) * 1000; 4039 4040 eloop_register_timeout(p2p->ext_listen_interval_sec, 4041 p2p->ext_listen_interval_usec, 4042 p2p_ext_listen_timeout, p2p, NULL); 4043 4044 return 0; 4045 } 4046 4047 4048 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 4049 const u8 *ie, size_t ie_len) 4050 { 4051 struct p2p_message msg; 4052 4053 if (bssid == NULL || ie == NULL) 4054 return; 4055 4056 os_memset(&msg, 0, sizeof(msg)); 4057 if (p2p_parse_ies(ie, ie_len, &msg)) 4058 return; 4059 if (msg.minor_reason_code == NULL) { 4060 p2p_parse_free(&msg); 4061 return; 4062 } 4063 4064 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR 4065 " reason_code=%u minor_reason_code=%u", 4066 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4067 4068 p2p_parse_free(&msg); 4069 } 4070 4071 4072 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 4073 const u8 *ie, size_t ie_len) 4074 { 4075 struct p2p_message msg; 4076 4077 if (bssid == NULL || ie == NULL) 4078 return; 4079 4080 os_memset(&msg, 0, sizeof(msg)); 4081 if (p2p_parse_ies(ie, ie_len, &msg)) 4082 return; 4083 if (msg.minor_reason_code == NULL) { 4084 p2p_parse_free(&msg); 4085 return; 4086 } 4087 4088 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR 4089 " reason_code=%u minor_reason_code=%u", 4090 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4091 4092 p2p_parse_free(&msg); 4093 } 4094 4095 4096 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled) 4097 { 4098 if (enabled) { 4099 p2p_dbg(p2p, "Managed P2P Device operations enabled"); 4100 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED; 4101 } else { 4102 p2p_dbg(p2p, "Managed P2P Device operations disabled"); 4103 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED; 4104 } 4105 } 4106 4107 4108 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class, 4109 u8 *op_channel) 4110 { 4111 return p2p_channel_random_social(&p2p->channels, op_class, op_channel); 4112 } 4113 4114 4115 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel, 4116 u8 forced) 4117 { 4118 if (p2p_channel_to_freq(reg_class, channel) < 0) 4119 return -1; 4120 4121 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u", 4122 reg_class, channel); 4123 4124 /* 4125 * Listen channel was set in configuration or set by control interface; 4126 * cannot override it. 4127 */ 4128 if (p2p->cfg->channel_forced && forced == 0) 4129 return -1; 4130 4131 if (p2p->state == P2P_IDLE) { 4132 p2p->cfg->reg_class = reg_class; 4133 p2p->cfg->channel = channel; 4134 p2p->cfg->channel_forced = forced; 4135 } else { 4136 p2p_dbg(p2p, "Defer setting listen channel"); 4137 p2p->pending_reg_class = reg_class; 4138 p2p->pending_channel = channel; 4139 p2p->pending_channel_forced = forced; 4140 } 4141 4142 return 0; 4143 } 4144 4145 4146 u8 p2p_get_listen_channel(struct p2p_data *p2p) 4147 { 4148 return p2p->cfg->channel; 4149 } 4150 4151 4152 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len) 4153 { 4154 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len)); 4155 if (postfix == NULL) { 4156 p2p->cfg->ssid_postfix_len = 0; 4157 return 0; 4158 } 4159 if (len > sizeof(p2p->cfg->ssid_postfix)) 4160 return -1; 4161 os_memcpy(p2p->cfg->ssid_postfix, postfix, len); 4162 p2p->cfg->ssid_postfix_len = len; 4163 return 0; 4164 } 4165 4166 4167 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel, 4168 int cfg_op_channel) 4169 { 4170 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0) 4171 return -1; 4172 4173 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u", 4174 op_reg_class, op_channel); 4175 p2p->cfg->op_reg_class = op_reg_class; 4176 p2p->cfg->op_channel = op_channel; 4177 p2p->cfg->cfg_op_channel = cfg_op_channel; 4178 return 0; 4179 } 4180 4181 4182 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan, 4183 const struct p2p_channel *pref_chan) 4184 { 4185 struct p2p_channel *n; 4186 4187 if (pref_chan) { 4188 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel)); 4189 if (n == NULL) 4190 return -1; 4191 os_memcpy(n, pref_chan, 4192 num_pref_chan * sizeof(struct p2p_channel)); 4193 } else 4194 n = NULL; 4195 4196 os_free(p2p->cfg->pref_chan); 4197 p2p->cfg->pref_chan = n; 4198 p2p->cfg->num_pref_chan = num_pref_chan; 4199 4200 return 0; 4201 } 4202 4203 4204 int p2p_set_no_go_freq(struct p2p_data *p2p, 4205 const struct wpa_freq_range_list *list) 4206 { 4207 struct wpa_freq_range *tmp; 4208 4209 if (list == NULL || list->num == 0) { 4210 os_free(p2p->no_go_freq.range); 4211 p2p->no_go_freq.range = NULL; 4212 p2p->no_go_freq.num = 0; 4213 return 0; 4214 } 4215 4216 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range)); 4217 if (tmp == NULL) 4218 return -1; 4219 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range)); 4220 os_free(p2p->no_go_freq.range); 4221 p2p->no_go_freq.range = tmp; 4222 p2p->no_go_freq.num = list->num; 4223 p2p_dbg(p2p, "Updated no GO chan list"); 4224 4225 return 0; 4226 } 4227 4228 4229 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr, 4230 u8 *iface_addr) 4231 { 4232 struct p2p_device *dev = p2p_get_device(p2p, dev_addr); 4233 if (dev == NULL || is_zero_ether_addr(dev->interface_addr)) 4234 return -1; 4235 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN); 4236 return 0; 4237 } 4238 4239 4240 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr, 4241 u8 *dev_addr) 4242 { 4243 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4244 if (dev == NULL) 4245 return -1; 4246 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN); 4247 return 0; 4248 } 4249 4250 4251 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr) 4252 { 4253 os_memcpy(p2p->peer_filter, addr, ETH_ALEN); 4254 if (is_zero_ether_addr(p2p->peer_filter)) 4255 p2p_dbg(p2p, "Disable peer filter"); 4256 else 4257 p2p_dbg(p2p, "Enable peer filter for " MACSTR, 4258 MAC2STR(p2p->peer_filter)); 4259 } 4260 4261 4262 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled) 4263 { 4264 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled"); 4265 if (p2p->cross_connect == enabled) 4266 return; 4267 p2p->cross_connect = enabled; 4268 /* TODO: may need to tear down any action group where we are GO(?) */ 4269 } 4270 4271 4272 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr) 4273 { 4274 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4275 if (dev == NULL) 4276 return -1; 4277 if (dev->oper_freq <= 0) 4278 return -1; 4279 return dev->oper_freq; 4280 } 4281 4282 4283 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled) 4284 { 4285 p2p_dbg(p2p, "Intra BSS distribution %s", 4286 enabled ? "enabled" : "disabled"); 4287 p2p->cfg->p2p_intra_bss = enabled; 4288 } 4289 4290 4291 void p2p_update_channel_list(struct p2p_data *p2p, 4292 const struct p2p_channels *chan, 4293 const struct p2p_channels *cli_chan) 4294 { 4295 p2p_dbg(p2p, "Update channel list"); 4296 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels)); 4297 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 4298 os_memcpy(&p2p->cfg->cli_channels, cli_chan, 4299 sizeof(struct p2p_channels)); 4300 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 4301 } 4302 4303 4304 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 4305 const u8 *src, const u8 *bssid, const u8 *buf, 4306 size_t len, unsigned int wait_time) 4307 { 4308 if (p2p->p2p_scan_running) { 4309 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes"); 4310 if (p2p->after_scan_tx) { 4311 p2p_dbg(p2p, "Dropped previous pending Action frame TX"); 4312 os_free(p2p->after_scan_tx); 4313 } 4314 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) + 4315 len); 4316 if (p2p->after_scan_tx == NULL) 4317 return -1; 4318 p2p->after_scan_tx->freq = freq; 4319 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN); 4320 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN); 4321 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN); 4322 p2p->after_scan_tx->len = len; 4323 p2p->after_scan_tx->wait_time = wait_time; 4324 os_memcpy(p2p->after_scan_tx + 1, buf, len); 4325 return 0; 4326 } 4327 4328 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid, 4329 buf, len, wait_time); 4330 } 4331 4332 4333 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5, 4334 int freq_overall) 4335 { 4336 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d", 4337 freq_24, freq_5, freq_overall); 4338 p2p->best_freq_24 = freq_24; 4339 p2p->best_freq_5 = freq_5; 4340 p2p->best_freq_overall = freq_overall; 4341 } 4342 4343 4344 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq) 4345 { 4346 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq); 4347 p2p->own_freq_preference = freq; 4348 } 4349 4350 4351 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p) 4352 { 4353 if (p2p == NULL || p2p->go_neg_peer == NULL) 4354 return NULL; 4355 return p2p->go_neg_peer->info.p2p_device_addr; 4356 } 4357 4358 4359 const struct p2p_peer_info * 4360 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next) 4361 { 4362 struct p2p_device *dev; 4363 4364 if (addr) { 4365 dev = p2p_get_device(p2p, addr); 4366 if (!dev) 4367 return NULL; 4368 4369 if (!next) { 4370 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 4371 return NULL; 4372 4373 return &dev->info; 4374 } else { 4375 do { 4376 dev = dl_list_first(&dev->list, 4377 struct p2p_device, 4378 list); 4379 if (!dev || &dev->list == &p2p->devices) 4380 return NULL; 4381 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY); 4382 } 4383 } else { 4384 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4385 if (!dev) 4386 return NULL; 4387 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 4388 dev = dl_list_first(&dev->list, 4389 struct p2p_device, 4390 list); 4391 if (!dev || &dev->list == &p2p->devices) 4392 return NULL; 4393 } 4394 } 4395 4396 return &dev->info; 4397 } 4398 4399 4400 int p2p_in_progress(struct p2p_data *p2p) 4401 { 4402 if (p2p == NULL) 4403 return 0; 4404 if (p2p->state == P2P_SEARCH) 4405 return 2; 4406 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING; 4407 } 4408 4409 4410 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout, 4411 u8 client_timeout) 4412 { 4413 if (p2p) { 4414 p2p->go_timeout = go_timeout; 4415 p2p->client_timeout = client_timeout; 4416 } 4417 } 4418 4419 4420 #ifdef CONFIG_WIFI_DISPLAY 4421 4422 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p) 4423 { 4424 size_t g; 4425 struct p2p_group *group; 4426 4427 for (g = 0; g < p2p->num_groups; g++) { 4428 group = p2p->groups[g]; 4429 p2p_group_force_beacon_update_ies(group); 4430 } 4431 } 4432 4433 4434 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie) 4435 { 4436 wpabuf_free(p2p->wfd_ie_beacon); 4437 p2p->wfd_ie_beacon = ie; 4438 p2p_update_wfd_ie_groups(p2p); 4439 return 0; 4440 } 4441 4442 4443 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie) 4444 { 4445 wpabuf_free(p2p->wfd_ie_probe_req); 4446 p2p->wfd_ie_probe_req = ie; 4447 return 0; 4448 } 4449 4450 4451 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie) 4452 { 4453 wpabuf_free(p2p->wfd_ie_probe_resp); 4454 p2p->wfd_ie_probe_resp = ie; 4455 p2p_update_wfd_ie_groups(p2p); 4456 return 0; 4457 } 4458 4459 4460 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie) 4461 { 4462 wpabuf_free(p2p->wfd_ie_assoc_req); 4463 p2p->wfd_ie_assoc_req = ie; 4464 return 0; 4465 } 4466 4467 4468 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie) 4469 { 4470 wpabuf_free(p2p->wfd_ie_invitation); 4471 p2p->wfd_ie_invitation = ie; 4472 return 0; 4473 } 4474 4475 4476 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie) 4477 { 4478 wpabuf_free(p2p->wfd_ie_prov_disc_req); 4479 p2p->wfd_ie_prov_disc_req = ie; 4480 return 0; 4481 } 4482 4483 4484 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie) 4485 { 4486 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 4487 p2p->wfd_ie_prov_disc_resp = ie; 4488 return 0; 4489 } 4490 4491 4492 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie) 4493 { 4494 wpabuf_free(p2p->wfd_ie_go_neg); 4495 p2p->wfd_ie_go_neg = ie; 4496 return 0; 4497 } 4498 4499 4500 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem) 4501 { 4502 wpabuf_free(p2p->wfd_dev_info); 4503 if (elem) { 4504 p2p->wfd_dev_info = wpabuf_dup(elem); 4505 if (p2p->wfd_dev_info == NULL) 4506 return -1; 4507 } else 4508 p2p->wfd_dev_info = NULL; 4509 4510 return 0; 4511 } 4512 4513 4514 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem) 4515 { 4516 wpabuf_free(p2p->wfd_assoc_bssid); 4517 if (elem) { 4518 p2p->wfd_assoc_bssid = wpabuf_dup(elem); 4519 if (p2p->wfd_assoc_bssid == NULL) 4520 return -1; 4521 } else 4522 p2p->wfd_assoc_bssid = NULL; 4523 4524 return 0; 4525 } 4526 4527 4528 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p, 4529 const struct wpabuf *elem) 4530 { 4531 wpabuf_free(p2p->wfd_coupled_sink_info); 4532 if (elem) { 4533 p2p->wfd_coupled_sink_info = wpabuf_dup(elem); 4534 if (p2p->wfd_coupled_sink_info == NULL) 4535 return -1; 4536 } else 4537 p2p->wfd_coupled_sink_info = NULL; 4538 4539 return 0; 4540 } 4541 4542 #endif /* CONFIG_WIFI_DISPLAY */ 4543 4544 4545 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int, 4546 int max_disc_tu) 4547 { 4548 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0) 4549 return -1; 4550 4551 p2p->min_disc_int = min_disc_int; 4552 p2p->max_disc_int = max_disc_int; 4553 p2p->max_disc_tu = max_disc_tu; 4554 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d", 4555 min_disc_int, max_disc_int, max_disc_tu); 4556 4557 return 0; 4558 } 4559 4560 4561 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...) 4562 { 4563 va_list ap; 4564 char buf[500]; 4565 4566 if (!p2p->cfg->debug_print) 4567 return; 4568 4569 va_start(ap, fmt); 4570 vsnprintf(buf, sizeof(buf), fmt, ap); 4571 buf[sizeof(buf) - 1] = '\0'; 4572 va_end(ap); 4573 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf); 4574 } 4575 4576 4577 void p2p_info(struct p2p_data *p2p, const char *fmt, ...) 4578 { 4579 va_list ap; 4580 char buf[500]; 4581 4582 if (!p2p->cfg->debug_print) 4583 return; 4584 4585 va_start(ap, fmt); 4586 vsnprintf(buf, sizeof(buf), fmt, ap); 4587 buf[sizeof(buf) - 1] = '\0'; 4588 va_end(ap); 4589 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf); 4590 } 4591 4592 4593 void p2p_err(struct p2p_data *p2p, const char *fmt, ...) 4594 { 4595 va_list ap; 4596 char buf[500]; 4597 4598 if (!p2p->cfg->debug_print) 4599 return; 4600 4601 va_start(ap, fmt); 4602 vsnprintf(buf, sizeof(buf), fmt, ap); 4603 buf[sizeof(buf) - 1] = '\0'; 4604 va_end(ap); 4605 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf); 4606 } 4607 4608 4609 void p2p_loop_on_known_peers(struct p2p_data *p2p, 4610 void (*peer_callback)(struct p2p_peer_info *peer, 4611 void *user_data), 4612 void *user_data) 4613 { 4614 struct p2p_device *dev, *n; 4615 4616 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) { 4617 peer_callback(&dev->info, user_data); 4618 } 4619 } 4620 4621 4622 #ifdef CONFIG_WPS_NFC 4623 4624 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p, 4625 int client_freq, 4626 const u8 *go_dev_addr, 4627 const u8 *ssid, size_t ssid_len) 4628 { 4629 struct wpabuf *buf; 4630 u8 op_class, channel; 4631 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP; 4632 4633 buf = wpabuf_alloc(1000); 4634 if (buf == NULL) 4635 return NULL; 4636 4637 op_class = p2p->cfg->reg_class; 4638 channel = p2p->cfg->channel; 4639 4640 p2p_buf_add_capability(buf, p2p->dev_capab & 4641 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 4642 p2p_buf_add_device_info(buf, p2p, NULL); 4643 4644 if (p2p->num_groups > 0) { 4645 int freq = p2p_group_get_freq(p2p->groups[0]); 4646 role = P2P_GO_IN_A_GROUP; 4647 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) { 4648 p2p_dbg(p2p, 4649 "Unknown GO operating frequency %d MHz for NFC handover", 4650 freq); 4651 wpabuf_free(buf); 4652 return NULL; 4653 } 4654 } else if (client_freq > 0) { 4655 role = P2P_CLIENT_IN_A_GROUP; 4656 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) { 4657 p2p_dbg(p2p, 4658 "Unknown client operating frequency %d MHz for NFC handover", 4659 client_freq); 4660 wpabuf_free(buf); 4661 return NULL; 4662 } 4663 } 4664 4665 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class, 4666 channel, role); 4667 4668 if (p2p->num_groups > 0) { 4669 /* Limit number of clients to avoid very long message */ 4670 p2p_buf_add_group_info(p2p->groups[0], buf, 5); 4671 p2p_group_buf_add_id(p2p->groups[0], buf); 4672 } else if (client_freq > 0 && 4673 go_dev_addr && !is_zero_ether_addr(go_dev_addr) && 4674 ssid && ssid_len > 0) { 4675 /* 4676 * Add the optional P2P Group ID to indicate in which group this 4677 * device is a P2P Client. 4678 */ 4679 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len); 4680 } 4681 4682 return buf; 4683 } 4684 4685 4686 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p, 4687 int client_freq, 4688 const u8 *go_dev_addr, 4689 const u8 *ssid, size_t ssid_len) 4690 { 4691 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 4692 ssid_len); 4693 } 4694 4695 4696 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p, 4697 int client_freq, 4698 const u8 *go_dev_addr, 4699 const u8 *ssid, size_t ssid_len) 4700 { 4701 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 4702 ssid_len); 4703 } 4704 4705 4706 int p2p_process_nfc_connection_handover(struct p2p_data *p2p, 4707 struct p2p_nfc_params *params) 4708 { 4709 struct p2p_message msg; 4710 struct p2p_device *dev; 4711 const u8 *p2p_dev_addr; 4712 int freq; 4713 enum p2p_role_indication role; 4714 4715 params->next_step = NO_ACTION; 4716 4717 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len, 4718 params->p2p_attr, params->p2p_len, &msg)) { 4719 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC"); 4720 p2p_parse_free(&msg); 4721 return -1; 4722 } 4723 4724 if (msg.p2p_device_addr) 4725 p2p_dev_addr = msg.p2p_device_addr; 4726 else if (msg.device_id) 4727 p2p_dev_addr = msg.device_id; 4728 else { 4729 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 4730 p2p_parse_free(&msg); 4731 return -1; 4732 } 4733 4734 if (msg.oob_dev_password) { 4735 os_memcpy(params->oob_dev_pw, msg.oob_dev_password, 4736 msg.oob_dev_password_len); 4737 params->oob_dev_pw_len = msg.oob_dev_password_len; 4738 } 4739 4740 dev = p2p_create_device(p2p, p2p_dev_addr); 4741 if (dev == NULL) { 4742 p2p_parse_free(&msg); 4743 return -1; 4744 } 4745 4746 params->peer = &dev->info; 4747 4748 os_get_reltime(&dev->last_seen); 4749 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 4750 p2p_copy_wps_info(p2p, dev, 0, &msg); 4751 4752 if (!msg.oob_go_neg_channel) { 4753 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included"); 4754 return -1; 4755 } 4756 4757 if (msg.oob_go_neg_channel[3] == 0 && 4758 msg.oob_go_neg_channel[4] == 0) 4759 freq = 0; 4760 else 4761 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3], 4762 msg.oob_go_neg_channel[4]); 4763 if (freq < 0) { 4764 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel"); 4765 return -1; 4766 } 4767 role = msg.oob_go_neg_channel[5]; 4768 4769 if (role == P2P_GO_IN_A_GROUP) { 4770 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq); 4771 params->go_freq = freq; 4772 } else if (role == P2P_CLIENT_IN_A_GROUP) { 4773 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz", 4774 freq); 4775 params->go_freq = freq; 4776 } else 4777 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq); 4778 dev->oob_go_neg_freq = freq; 4779 4780 if (!params->sel && role != P2P_GO_IN_A_GROUP) { 4781 freq = p2p_channel_to_freq(p2p->cfg->reg_class, 4782 p2p->cfg->channel); 4783 if (freq < 0) { 4784 p2p_dbg(p2p, "Own listen channel not known"); 4785 return -1; 4786 } 4787 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq); 4788 dev->oob_go_neg_freq = freq; 4789 } 4790 4791 if (msg.group_id) { 4792 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN); 4793 params->go_ssid_len = msg.group_id_len - ETH_ALEN; 4794 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN, 4795 params->go_ssid_len); 4796 } 4797 4798 if (dev->flags & P2P_DEV_USER_REJECTED) { 4799 p2p_dbg(p2p, "Do not report rejected device"); 4800 p2p_parse_free(&msg); 4801 return 0; 4802 } 4803 4804 if (!(dev->flags & P2P_DEV_REPORTED)) { 4805 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info, 4806 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 4807 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 4808 } 4809 p2p_parse_free(&msg); 4810 4811 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0) 4812 params->next_step = BOTH_GO; 4813 else if (role == P2P_GO_IN_A_GROUP) 4814 params->next_step = JOIN_GROUP; 4815 else if (role == P2P_CLIENT_IN_A_GROUP) { 4816 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 4817 params->next_step = PEER_CLIENT; 4818 } else if (p2p->num_groups > 0) 4819 params->next_step = AUTH_JOIN; 4820 else if (params->sel) 4821 params->next_step = INIT_GO_NEG; 4822 else 4823 params->next_step = RESP_GO_NEG; 4824 4825 return 0; 4826 } 4827 4828 4829 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id, 4830 int go_intent, 4831 const u8 *own_interface_addr) 4832 { 4833 4834 p2p->authorized_oob_dev_pw_id = dev_pw_id; 4835 if (dev_pw_id == 0) { 4836 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover"); 4837 return; 4838 } 4839 4840 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover", 4841 dev_pw_id); 4842 4843 p2p->go_intent = go_intent; 4844 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 4845 } 4846 4847 #endif /* CONFIG_WPS_NFC */ 4848 4849 4850 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len) 4851 { 4852 if (len < 8 || len > 63) 4853 return -1; 4854 p2p->cfg->passphrase_len = len; 4855 return 0; 4856 } 4857 4858 4859 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem) 4860 { 4861 p2p->vendor_elem = vendor_elem; 4862 } 4863
