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/defs.h" 14 #include "common/ieee802_11_defs.h" 15 #include "common/ieee802_11_common.h" 16 #include "common/wpa_ctrl.h" 17 #include "crypto/sha256.h" 18 #include "crypto/crypto.h" 19 #include "wps/wps_i.h" 20 #include "p2p_i.h" 21 #include "p2p.h" 22 23 24 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx); 25 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev); 26 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 27 const u8 *sa, const u8 *data, size_t len, 28 int rx_freq); 29 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 30 const u8 *sa, const u8 *data, 31 size_t len); 32 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx); 33 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx); 34 35 36 /* 37 * p2p_scan recovery timeout 38 * 39 * Many drivers are using 30 second timeout on scan results. Allow a bit larger 40 * timeout for this to avoid hitting P2P timeout unnecessarily. 41 */ 42 #define P2P_SCAN_TIMEOUT 35 43 44 /** 45 * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer 46 * entries will be removed 47 */ 48 #ifndef P2P_PEER_EXPIRATION_AGE 49 #define P2P_PEER_EXPIRATION_AGE 60 50 #endif /* P2P_PEER_EXPIRATION_AGE */ 51 52 53 void p2p_expire_peers(struct p2p_data *p2p) 54 { 55 struct p2p_device *dev, *n; 56 struct os_reltime now; 57 size_t i; 58 59 os_get_reltime(&now); 60 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) { 61 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec) 62 continue; 63 64 if (dev == p2p->go_neg_peer) { 65 /* 66 * GO Negotiation is in progress with the peer, so 67 * don't expire the peer entry until GO Negotiation 68 * fails or times out. 69 */ 70 continue; 71 } 72 73 if (p2p->cfg->go_connected && 74 p2p->cfg->go_connected(p2p->cfg->cb_ctx, 75 dev->info.p2p_device_addr)) { 76 /* 77 * We are connected as a client to a group in which the 78 * peer is the GO, so do not expire the peer entry. 79 */ 80 os_get_reltime(&dev->last_seen); 81 continue; 82 } 83 84 for (i = 0; i < p2p->num_groups; i++) { 85 if (p2p_group_is_client_connected( 86 p2p->groups[i], dev->info.p2p_device_addr)) 87 break; 88 } 89 if (i < p2p->num_groups) { 90 /* 91 * The peer is connected as a client in a group where 92 * we are the GO, so do not expire the peer entry. 93 */ 94 os_get_reltime(&dev->last_seen); 95 continue; 96 } 97 98 p2p_dbg(p2p, "Expiring old peer entry " MACSTR, 99 MAC2STR(dev->info.p2p_device_addr)); 100 dl_list_del(&dev->list); 101 p2p_device_free(p2p, dev); 102 } 103 } 104 105 106 static const char * p2p_state_txt(int state) 107 { 108 switch (state) { 109 case P2P_IDLE: 110 return "IDLE"; 111 case P2P_SEARCH: 112 return "SEARCH"; 113 case P2P_CONNECT: 114 return "CONNECT"; 115 case P2P_CONNECT_LISTEN: 116 return "CONNECT_LISTEN"; 117 case P2P_GO_NEG: 118 return "GO_NEG"; 119 case P2P_LISTEN_ONLY: 120 return "LISTEN_ONLY"; 121 case P2P_WAIT_PEER_CONNECT: 122 return "WAIT_PEER_CONNECT"; 123 case P2P_WAIT_PEER_IDLE: 124 return "WAIT_PEER_IDLE"; 125 case P2P_SD_DURING_FIND: 126 return "SD_DURING_FIND"; 127 case P2P_PROVISIONING: 128 return "PROVISIONING"; 129 case P2P_PD_DURING_FIND: 130 return "PD_DURING_FIND"; 131 case P2P_INVITE: 132 return "INVITE"; 133 case P2P_INVITE_LISTEN: 134 return "INVITE_LISTEN"; 135 default: 136 return "?"; 137 } 138 } 139 140 141 const char * p2p_get_state_txt(struct p2p_data *p2p) 142 { 143 return p2p_state_txt(p2p->state); 144 } 145 146 147 struct p2ps_advertisement * p2p_get_p2ps_adv_list(struct p2p_data *p2p) 148 { 149 return p2p ? p2p->p2ps_adv_list : NULL; 150 } 151 152 153 void p2p_set_intended_addr(struct p2p_data *p2p, const u8 *intended_addr) 154 { 155 if (p2p && intended_addr) 156 os_memcpy(p2p->intended_addr, intended_addr, ETH_ALEN); 157 } 158 159 160 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr) 161 { 162 struct p2p_device *dev = NULL; 163 164 if (!addr || !p2p) 165 return 0; 166 167 dev = p2p_get_device(p2p, addr); 168 if (dev) 169 return dev->wps_prov_info; 170 else 171 return 0; 172 } 173 174 175 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr) 176 { 177 struct p2p_device *dev = NULL; 178 179 if (!addr || !p2p) 180 return; 181 182 dev = p2p_get_device(p2p, addr); 183 if (dev) 184 dev->wps_prov_info = 0; 185 } 186 187 188 void p2p_set_state(struct p2p_data *p2p, int new_state) 189 { 190 p2p_dbg(p2p, "State %s -> %s", 191 p2p_state_txt(p2p->state), p2p_state_txt(new_state)); 192 p2p->state = new_state; 193 194 if (new_state == P2P_IDLE && p2p->pending_channel) { 195 p2p_dbg(p2p, "Apply change in listen channel"); 196 p2p->cfg->reg_class = p2p->pending_reg_class; 197 p2p->cfg->channel = p2p->pending_channel; 198 p2p->pending_reg_class = 0; 199 p2p->pending_channel = 0; 200 } 201 } 202 203 204 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec) 205 { 206 p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec", 207 p2p_state_txt(p2p->state), sec, usec); 208 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 209 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL); 210 } 211 212 213 void p2p_clear_timeout(struct p2p_data *p2p) 214 { 215 p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state)); 216 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 217 } 218 219 220 void p2p_go_neg_failed(struct p2p_data *p2p, int status) 221 { 222 struct p2p_go_neg_results res; 223 struct p2p_device *peer = p2p->go_neg_peer; 224 225 if (!peer) 226 return; 227 228 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL); 229 if (p2p->state != P2P_SEARCH) { 230 /* 231 * Clear timeouts related to GO Negotiation if no new p2p_find 232 * has been started. 233 */ 234 p2p_clear_timeout(p2p); 235 p2p_set_state(p2p, P2P_IDLE); 236 } 237 238 peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 239 peer->wps_method = WPS_NOT_READY; 240 peer->oob_pw_id = 0; 241 wpabuf_free(peer->go_neg_conf); 242 peer->go_neg_conf = NULL; 243 p2p->go_neg_peer = NULL; 244 245 os_memset(&res, 0, sizeof(res)); 246 res.status = status; 247 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 248 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 249 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 250 } 251 252 253 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc) 254 { 255 unsigned int r, tu; 256 int freq; 257 struct wpabuf *ies; 258 259 p2p_dbg(p2p, "Starting short listen state (state=%s)", 260 p2p_state_txt(p2p->state)); 261 262 if (p2p->pending_listen_freq) { 263 /* We have a pending p2p_listen request */ 264 p2p_dbg(p2p, "p2p_listen command pending already"); 265 return; 266 } 267 268 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 269 if (freq < 0) { 270 p2p_dbg(p2p, "Unknown regulatory class/channel"); 271 return; 272 } 273 274 if (os_get_random((u8 *) &r, sizeof(r)) < 0) 275 r = 0; 276 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) + 277 p2p->min_disc_int) * 100; 278 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu) 279 tu = p2p->max_disc_tu; 280 if (!dev_disc && tu < 100) 281 tu = 100; /* Need to wait in non-device discovery use cases */ 282 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen) 283 tu = p2p->cfg->max_listen * 1000 / 1024; 284 285 if (tu == 0) { 286 p2p_dbg(p2p, "Skip listen state since duration was 0 TU"); 287 p2p_set_timeout(p2p, 0, 0); 288 return; 289 } 290 291 ies = p2p_build_probe_resp_ies(p2p, NULL, 0); 292 if (ies == NULL) 293 return; 294 295 p2p->pending_listen_freq = freq; 296 p2p->pending_listen_sec = 0; 297 p2p->pending_listen_usec = 1024 * tu; 298 299 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000, 300 ies) < 0) { 301 p2p_dbg(p2p, "Failed to start listen mode"); 302 p2p->pending_listen_freq = 0; 303 } 304 wpabuf_free(ies); 305 } 306 307 308 int p2p_listen(struct p2p_data *p2p, unsigned int timeout) 309 { 310 int freq; 311 struct wpabuf *ies; 312 313 p2p_dbg(p2p, "Going to listen(only) state"); 314 315 if (p2p->pending_listen_freq) { 316 /* We have a pending p2p_listen request */ 317 p2p_dbg(p2p, "p2p_listen command pending already"); 318 return -1; 319 } 320 321 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 322 if (freq < 0) { 323 p2p_dbg(p2p, "Unknown regulatory class/channel"); 324 return -1; 325 } 326 327 p2p->pending_listen_sec = timeout / 1000; 328 p2p->pending_listen_usec = (timeout % 1000) * 1000; 329 330 if (p2p->p2p_scan_running) { 331 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) { 332 p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen"); 333 return 0; 334 } 335 p2p_dbg(p2p, "p2p_scan running - delay start of listen state"); 336 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN; 337 return 0; 338 } 339 340 ies = p2p_build_probe_resp_ies(p2p, NULL, 0); 341 if (ies == NULL) 342 return -1; 343 344 p2p->pending_listen_freq = freq; 345 346 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) { 347 p2p_dbg(p2p, "Failed to start listen mode"); 348 p2p->pending_listen_freq = 0; 349 wpabuf_free(ies); 350 return -1; 351 } 352 wpabuf_free(ies); 353 354 p2p_set_state(p2p, P2P_LISTEN_ONLY); 355 356 return 0; 357 } 358 359 360 static void p2p_device_clear_reported(struct p2p_data *p2p) 361 { 362 struct p2p_device *dev; 363 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 364 dev->flags &= ~P2P_DEV_REPORTED; 365 dev->sd_reqs = 0; 366 } 367 } 368 369 370 /** 371 * p2p_get_device - Fetch a peer entry 372 * @p2p: P2P module context from p2p_init() 373 * @addr: P2P Device Address of the peer 374 * Returns: Pointer to the device entry or %NULL if not found 375 */ 376 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr) 377 { 378 struct p2p_device *dev; 379 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 380 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0) 381 return dev; 382 } 383 return NULL; 384 } 385 386 387 /** 388 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address 389 * @p2p: P2P module context from p2p_init() 390 * @addr: P2P Interface Address of the peer 391 * Returns: Pointer to the device entry or %NULL if not found 392 */ 393 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p, 394 const u8 *addr) 395 { 396 struct p2p_device *dev; 397 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 398 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0) 399 return dev; 400 } 401 return NULL; 402 } 403 404 405 /** 406 * p2p_create_device - Create a peer entry 407 * @p2p: P2P module context from p2p_init() 408 * @addr: P2P Device Address of the peer 409 * Returns: Pointer to the device entry or %NULL on failure 410 * 411 * If there is already an entry for the peer, it will be returned instead of 412 * creating a new one. 413 */ 414 static struct p2p_device * p2p_create_device(struct p2p_data *p2p, 415 const u8 *addr) 416 { 417 struct p2p_device *dev, *oldest = NULL; 418 size_t count = 0; 419 420 dev = p2p_get_device(p2p, addr); 421 if (dev) 422 return dev; 423 424 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 425 count++; 426 if (oldest == NULL || 427 os_reltime_before(&dev->last_seen, &oldest->last_seen)) 428 oldest = dev; 429 } 430 if (count + 1 > p2p->cfg->max_peers && oldest) { 431 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer"); 432 dl_list_del(&oldest->list); 433 p2p_device_free(p2p, oldest); 434 } 435 436 dev = os_zalloc(sizeof(*dev)); 437 if (dev == NULL) 438 return NULL; 439 dl_list_add(&p2p->devices, &dev->list); 440 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN); 441 442 return dev; 443 } 444 445 446 static void p2p_copy_client_info(struct p2p_device *dev, 447 struct p2p_client_info *cli) 448 { 449 p2p_copy_filter_devname(dev->info.device_name, 450 sizeof(dev->info.device_name), 451 cli->dev_name, cli->dev_name_len); 452 dev->info.dev_capab = cli->dev_capab; 453 dev->info.config_methods = cli->config_methods; 454 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8); 455 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types; 456 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types, 457 dev->info.wps_sec_dev_type_list_len); 458 } 459 460 461 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr, 462 const u8 *go_interface_addr, int freq, 463 const u8 *gi, size_t gi_len, 464 struct os_reltime *rx_time) 465 { 466 struct p2p_group_info info; 467 size_t c; 468 struct p2p_device *dev; 469 470 if (gi == NULL) 471 return 0; 472 473 if (p2p_group_info_parse(gi, gi_len, &info) < 0) 474 return -1; 475 476 /* 477 * Clear old data for this group; if the devices are still in the 478 * group, the information will be restored in the loop following this. 479 */ 480 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 481 if (os_memcmp(dev->member_in_go_iface, go_interface_addr, 482 ETH_ALEN) == 0) { 483 os_memset(dev->member_in_go_iface, 0, ETH_ALEN); 484 os_memset(dev->member_in_go_dev, 0, ETH_ALEN); 485 } 486 } 487 488 for (c = 0; c < info.num_clients; c++) { 489 struct p2p_client_info *cli = &info.client[c]; 490 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr, 491 ETH_ALEN) == 0) 492 continue; /* ignore our own entry */ 493 dev = p2p_get_device(p2p, cli->p2p_device_addr); 494 if (dev) { 495 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY | 496 P2P_DEV_PROBE_REQ_ONLY)) { 497 /* 498 * Update information since we have not 499 * received this directly from the client. 500 */ 501 p2p_copy_client_info(dev, cli); 502 } else { 503 /* 504 * Need to update P2P Client Discoverability 505 * flag since it is valid only in P2P Group 506 * Info attribute. 507 */ 508 dev->info.dev_capab &= 509 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 510 dev->info.dev_capab |= 511 cli->dev_capab & 512 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 513 } 514 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 515 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 516 } 517 } else { 518 dev = p2p_create_device(p2p, cli->p2p_device_addr); 519 if (dev == NULL) 520 continue; 521 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 522 p2p_copy_client_info(dev, cli); 523 dev->oper_freq = freq; 524 p2p->cfg->dev_found(p2p->cfg->cb_ctx, 525 dev->info.p2p_device_addr, 526 &dev->info, 1); 527 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 528 } 529 530 os_memcpy(dev->interface_addr, cli->p2p_interface_addr, 531 ETH_ALEN); 532 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime)); 533 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN); 534 os_memcpy(dev->member_in_go_iface, go_interface_addr, 535 ETH_ALEN); 536 dev->flags |= P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT; 537 } 538 539 return 0; 540 } 541 542 543 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev, 544 int probe_req, const struct p2p_message *msg) 545 { 546 os_memcpy(dev->info.device_name, msg->device_name, 547 sizeof(dev->info.device_name)); 548 549 if (msg->manufacturer && 550 msg->manufacturer_len < sizeof(dev->info.manufacturer)) { 551 os_memset(dev->info.manufacturer, 0, 552 sizeof(dev->info.manufacturer)); 553 os_memcpy(dev->info.manufacturer, msg->manufacturer, 554 msg->manufacturer_len); 555 } 556 557 if (msg->model_name && 558 msg->model_name_len < sizeof(dev->info.model_name)) { 559 os_memset(dev->info.model_name, 0, 560 sizeof(dev->info.model_name)); 561 os_memcpy(dev->info.model_name, msg->model_name, 562 msg->model_name_len); 563 } 564 565 if (msg->model_number && 566 msg->model_number_len < sizeof(dev->info.model_number)) { 567 os_memset(dev->info.model_number, 0, 568 sizeof(dev->info.model_number)); 569 os_memcpy(dev->info.model_number, msg->model_number, 570 msg->model_number_len); 571 } 572 573 if (msg->serial_number && 574 msg->serial_number_len < sizeof(dev->info.serial_number)) { 575 os_memset(dev->info.serial_number, 0, 576 sizeof(dev->info.serial_number)); 577 os_memcpy(dev->info.serial_number, msg->serial_number, 578 msg->serial_number_len); 579 } 580 581 if (msg->pri_dev_type) 582 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type, 583 sizeof(dev->info.pri_dev_type)); 584 else if (msg->wps_pri_dev_type) 585 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type, 586 sizeof(dev->info.pri_dev_type)); 587 588 if (msg->wps_sec_dev_type_list) { 589 os_memcpy(dev->info.wps_sec_dev_type_list, 590 msg->wps_sec_dev_type_list, 591 msg->wps_sec_dev_type_list_len); 592 dev->info.wps_sec_dev_type_list_len = 593 msg->wps_sec_dev_type_list_len; 594 } 595 596 if (msg->capability) { 597 /* 598 * P2P Client Discoverability bit is reserved in all frames 599 * that use this function, so do not change its value here. 600 */ 601 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 602 dev->info.dev_capab |= msg->capability[0] & 603 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 604 dev->info.group_capab = msg->capability[1]; 605 } 606 607 if (msg->ext_listen_timing) { 608 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing); 609 dev->ext_listen_interval = 610 WPA_GET_LE16(msg->ext_listen_timing + 2); 611 } 612 613 if (!probe_req) { 614 u16 new_config_methods; 615 new_config_methods = msg->config_methods ? 616 msg->config_methods : msg->wps_config_methods; 617 if (new_config_methods && 618 dev->info.config_methods != new_config_methods) { 619 p2p_dbg(p2p, "Update peer " MACSTR 620 " config_methods 0x%x -> 0x%x", 621 MAC2STR(dev->info.p2p_device_addr), 622 dev->info.config_methods, 623 new_config_methods); 624 dev->info.config_methods = new_config_methods; 625 } 626 } 627 } 628 629 630 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies, 631 size_t ies_len) 632 { 633 const u8 *pos, *end; 634 u8 id, len; 635 636 wpabuf_free(dev->info.vendor_elems); 637 dev->info.vendor_elems = NULL; 638 639 end = ies + ies_len; 640 641 for (pos = ies; end - pos > 1; pos += len) { 642 id = *pos++; 643 len = *pos++; 644 645 if (len > end - pos) 646 break; 647 648 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3) 649 continue; 650 651 if (len >= 4) { 652 u32 type = WPA_GET_BE32(pos); 653 654 if (type == WPA_IE_VENDOR_TYPE || 655 type == WMM_IE_VENDOR_TYPE || 656 type == WPS_IE_VENDOR_TYPE || 657 type == P2P_IE_VENDOR_TYPE || 658 type == WFD_IE_VENDOR_TYPE) 659 continue; 660 } 661 662 /* Unknown vendor element - make raw IE data available */ 663 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0) 664 break; 665 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len); 666 } 667 } 668 669 670 static int p2p_compare_wfd_info(struct p2p_device *dev, 671 const struct p2p_message *msg) 672 { 673 if (dev->info.wfd_subelems && msg->wfd_subelems) { 674 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used) 675 return 1; 676 677 return os_memcmp(dev->info.wfd_subelems->buf, 678 msg->wfd_subelems->buf, 679 dev->info.wfd_subelems->used); 680 } 681 if (dev->info.wfd_subelems || msg->wfd_subelems) 682 return 1; 683 684 return 0; 685 } 686 687 688 /** 689 * p2p_add_device - Add peer entries based on scan results or P2P frames 690 * @p2p: P2P module context from p2p_init() 691 * @addr: Source address of Beacon or Probe Response frame (may be either 692 * P2P Device Address or P2P Interface Address) 693 * @level: Signal level (signal strength of the received frame from the peer) 694 * @freq: Frequency on which the Beacon or Probe Response frame was received 695 * @rx_time: Time when the result was received 696 * @ies: IEs from the Beacon or Probe Response frame 697 * @ies_len: Length of ies buffer in octets 698 * @scan_res: Whether this was based on scan results 699 * Returns: 0 on success, -1 on failure 700 * 701 * If the scan result is for a GO, the clients in the group will also be added 702 * to the peer table. This function can also be used with some other frames 703 * like Provision Discovery Request that contains P2P Capability and P2P Device 704 * Info attributes. 705 */ 706 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq, 707 struct os_reltime *rx_time, int level, const u8 *ies, 708 size_t ies_len, int scan_res) 709 { 710 struct p2p_device *dev; 711 struct p2p_message msg; 712 const u8 *p2p_dev_addr; 713 int wfd_changed; 714 int dev_name_changed; 715 int i; 716 struct os_reltime time_now; 717 718 os_memset(&msg, 0, sizeof(msg)); 719 if (p2p_parse_ies(ies, ies_len, &msg)) { 720 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry"); 721 p2p_parse_free(&msg); 722 return -1; 723 } 724 725 if (msg.p2p_device_addr) 726 p2p_dev_addr = msg.p2p_device_addr; 727 else if (msg.device_id) 728 p2p_dev_addr = msg.device_id; 729 else { 730 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 731 p2p_parse_free(&msg); 732 return -1; 733 } 734 735 if (!is_zero_ether_addr(p2p->peer_filter) && 736 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) { 737 p2p_dbg(p2p, "Do not add peer filter for " MACSTR 738 " due to peer filter", MAC2STR(p2p_dev_addr)); 739 p2p_parse_free(&msg); 740 return 0; 741 } 742 743 dev = p2p_create_device(p2p, p2p_dev_addr); 744 if (dev == NULL) { 745 p2p_parse_free(&msg); 746 return -1; 747 } 748 749 if (rx_time == NULL) { 750 os_get_reltime(&time_now); 751 rx_time = &time_now; 752 } 753 754 /* 755 * Update the device entry only if the new peer 756 * entry is newer than the one previously stored, or if 757 * the device was previously seen as a P2P Client in a group 758 * and the new entry isn't older than a threshold. 759 */ 760 if (dev->last_seen.sec > 0 && 761 os_reltime_before(rx_time, &dev->last_seen) && 762 (!(dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT) || 763 os_reltime_expired(&dev->last_seen, rx_time, 764 P2P_DEV_GROUP_CLIENT_RESP_THRESHOLD))) { 765 p2p_dbg(p2p, 766 "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u flags=0x%x)", 767 (unsigned int) rx_time->sec, 768 (unsigned int) rx_time->usec, 769 (unsigned int) dev->last_seen.sec, 770 (unsigned int) dev->last_seen.usec, 771 dev->flags); 772 p2p_parse_free(&msg); 773 return -1; 774 } 775 776 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime)); 777 778 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY | 779 P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT); 780 781 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0) 782 os_memcpy(dev->interface_addr, addr, ETH_ALEN); 783 if (msg.ssid && 784 msg.ssid[1] <= sizeof(dev->oper_ssid) && 785 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 786 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 787 != 0)) { 788 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]); 789 dev->oper_ssid_len = msg.ssid[1]; 790 } 791 792 wpabuf_free(dev->info.p2ps_instance); 793 dev->info.p2ps_instance = NULL; 794 if (msg.adv_service_instance && msg.adv_service_instance_len) 795 dev->info.p2ps_instance = wpabuf_alloc_copy( 796 msg.adv_service_instance, msg.adv_service_instance_len); 797 798 if (freq >= 2412 && freq <= 2484 && msg.ds_params && 799 *msg.ds_params >= 1 && *msg.ds_params <= 14) { 800 int ds_freq; 801 if (*msg.ds_params == 14) 802 ds_freq = 2484; 803 else 804 ds_freq = 2407 + *msg.ds_params * 5; 805 if (freq != ds_freq) { 806 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz", 807 freq, ds_freq); 808 freq = ds_freq; 809 } 810 } 811 812 if (dev->listen_freq && dev->listen_freq != freq && scan_res) { 813 p2p_dbg(p2p, "Update Listen frequency based on scan results (" 814 MACSTR " %d -> %d MHz (DS param %d)", 815 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq, 816 freq, msg.ds_params ? *msg.ds_params : -1); 817 } 818 if (scan_res) { 819 dev->listen_freq = freq; 820 if (msg.group_info) 821 dev->oper_freq = freq; 822 } 823 dev->info.level = level; 824 825 dev_name_changed = os_strncmp(dev->info.device_name, msg.device_name, 826 WPS_DEV_NAME_MAX_LEN) != 0; 827 828 p2p_copy_wps_info(p2p, dev, 0, &msg); 829 830 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 831 wpabuf_free(dev->info.wps_vendor_ext[i]); 832 dev->info.wps_vendor_ext[i] = NULL; 833 } 834 835 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 836 if (msg.wps_vendor_ext[i] == NULL) 837 break; 838 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy( 839 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]); 840 if (dev->info.wps_vendor_ext[i] == NULL) 841 break; 842 } 843 844 wfd_changed = p2p_compare_wfd_info(dev, &msg); 845 846 if (wfd_changed) { 847 wpabuf_free(dev->info.wfd_subelems); 848 if (msg.wfd_subelems) 849 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 850 else 851 dev->info.wfd_subelems = NULL; 852 } 853 854 if (scan_res) { 855 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq, 856 msg.group_info, msg.group_info_len, 857 rx_time); 858 } 859 860 p2p_parse_free(&msg); 861 862 p2p_update_peer_vendor_elems(dev, ies, ies_len); 863 864 if (dev->flags & P2P_DEV_REPORTED && !wfd_changed && 865 !dev_name_changed && 866 (!msg.adv_service_instance || 867 (dev->flags & P2P_DEV_P2PS_REPORTED))) 868 return 0; 869 870 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)", 871 freq, (unsigned int) rx_time->sec, 872 (unsigned int) rx_time->usec); 873 if (dev->flags & P2P_DEV_USER_REJECTED) { 874 p2p_dbg(p2p, "Do not report rejected device"); 875 return 0; 876 } 877 878 if (dev->info.config_methods == 0 && 879 (freq == 2412 || freq == 2437 || freq == 2462)) { 880 /* 881 * If we have only seen a Beacon frame from a GO, we do not yet 882 * know what WPS config methods it supports. Since some 883 * applications use config_methods value from P2P-DEVICE-FOUND 884 * events, postpone reporting this peer until we've fully 885 * discovered its capabilities. 886 * 887 * At least for now, do this only if the peer was detected on 888 * one of the social channels since that peer can be easily be 889 * found again and there are no limitations of having to use 890 * passive scan on this channels, so this can be done through 891 * Probe Response frame that includes the config_methods 892 * information. 893 */ 894 p2p_dbg(p2p, "Do not report peer " MACSTR 895 " with unknown config methods", MAC2STR(addr)); 896 return 0; 897 } 898 899 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 900 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 901 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 902 903 if (msg.adv_service_instance) 904 dev->flags |= P2P_DEV_P2PS_REPORTED; 905 906 return 0; 907 } 908 909 910 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev) 911 { 912 int i; 913 914 if (p2p->go_neg_peer == dev) { 915 /* 916 * If GO Negotiation is in progress, report that it has failed. 917 */ 918 p2p_go_neg_failed(p2p, -1); 919 } 920 if (p2p->invite_peer == dev) 921 p2p->invite_peer = NULL; 922 if (p2p->sd_peer == dev) 923 p2p->sd_peer = NULL; 924 if (p2p->pending_client_disc_go == dev) 925 p2p->pending_client_disc_go = NULL; 926 927 /* dev_lost() device, but only if it was previously dev_found() */ 928 if (dev->flags & P2P_DEV_REPORTED_ONCE) 929 p2p->cfg->dev_lost(p2p->cfg->cb_ctx, 930 dev->info.p2p_device_addr); 931 932 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 933 wpabuf_free(dev->info.wps_vendor_ext[i]); 934 dev->info.wps_vendor_ext[i] = NULL; 935 } 936 937 wpabuf_free(dev->info.wfd_subelems); 938 wpabuf_free(dev->info.vendor_elems); 939 wpabuf_free(dev->go_neg_conf); 940 wpabuf_free(dev->info.p2ps_instance); 941 942 os_free(dev); 943 } 944 945 946 static int p2p_get_next_prog_freq(struct p2p_data *p2p) 947 { 948 struct p2p_channels *c; 949 struct p2p_reg_class *cla; 950 size_t cl, ch; 951 int found = 0; 952 u8 reg_class; 953 u8 channel; 954 int freq; 955 956 c = &p2p->cfg->channels; 957 for (cl = 0; cl < c->reg_classes; cl++) { 958 cla = &c->reg_class[cl]; 959 if (cla->reg_class != p2p->last_prog_scan_class) 960 continue; 961 for (ch = 0; ch < cla->channels; ch++) { 962 if (cla->channel[ch] == p2p->last_prog_scan_chan) { 963 found = 1; 964 break; 965 } 966 } 967 if (found) 968 break; 969 } 970 971 if (!found) { 972 /* Start from beginning */ 973 reg_class = c->reg_class[0].reg_class; 974 channel = c->reg_class[0].channel[0]; 975 } else { 976 /* Pick the next channel */ 977 ch++; 978 if (ch == cla->channels) { 979 cl++; 980 if (cl == c->reg_classes) 981 cl = 0; 982 ch = 0; 983 } 984 reg_class = c->reg_class[cl].reg_class; 985 channel = c->reg_class[cl].channel[ch]; 986 } 987 988 freq = p2p_channel_to_freq(reg_class, channel); 989 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz", 990 reg_class, channel, freq); 991 p2p->last_prog_scan_class = reg_class; 992 p2p->last_prog_scan_chan = channel; 993 994 if (freq == 2412 || freq == 2437 || freq == 2462) 995 return 0; /* No need to add social channels */ 996 return freq; 997 } 998 999 1000 static void p2p_search(struct p2p_data *p2p) 1001 { 1002 int freq = 0; 1003 enum p2p_scan_type type; 1004 u16 pw_id = DEV_PW_DEFAULT; 1005 int res; 1006 1007 if (p2p->drv_in_listen) { 1008 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing"); 1009 return; 1010 } 1011 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1012 1013 if (p2p->find_type == P2P_FIND_PROGRESSIVE && 1014 (freq = p2p_get_next_prog_freq(p2p)) > 0) { 1015 type = P2P_SCAN_SOCIAL_PLUS_ONE; 1016 p2p_dbg(p2p, "Starting search (+ freq %u)", freq); 1017 } else { 1018 type = P2P_SCAN_SOCIAL; 1019 p2p_dbg(p2p, "Starting search"); 1020 } 1021 1022 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq, 1023 p2p->num_req_dev_types, p2p->req_dev_types, 1024 p2p->find_dev_id, pw_id); 1025 if (res < 0) { 1026 p2p_dbg(p2p, "Scan request schedule failed"); 1027 p2p_continue_find(p2p); 1028 } 1029 } 1030 1031 1032 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx) 1033 { 1034 struct p2p_data *p2p = eloop_ctx; 1035 p2p_dbg(p2p, "Find timeout -> stop"); 1036 p2p_stop_find(p2p); 1037 } 1038 1039 1040 void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status) 1041 { 1042 if (status != 0) { 1043 p2p_dbg(p2p, "Scan request failed"); 1044 /* Do continue find even for the first p2p_find_scan */ 1045 p2p_continue_find(p2p); 1046 } else { 1047 p2p_dbg(p2p, "Running p2p_scan"); 1048 p2p->p2p_scan_running = 1; 1049 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 1050 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 1051 p2p, NULL); 1052 } 1053 } 1054 1055 1056 static int p2p_run_after_scan(struct p2p_data *p2p) 1057 { 1058 struct p2p_device *dev; 1059 enum p2p_after_scan op; 1060 1061 if (p2p->after_scan_tx) { 1062 p2p->after_scan_tx_in_progress = 1; 1063 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion"); 1064 p2p->cfg->send_action(p2p->cfg->cb_ctx, 1065 p2p->after_scan_tx->freq, 1066 p2p->after_scan_tx->dst, 1067 p2p->after_scan_tx->src, 1068 p2p->after_scan_tx->bssid, 1069 (u8 *) (p2p->after_scan_tx + 1), 1070 p2p->after_scan_tx->len, 1071 p2p->after_scan_tx->wait_time); 1072 os_free(p2p->after_scan_tx); 1073 p2p->after_scan_tx = NULL; 1074 return 1; 1075 } 1076 1077 op = p2p->start_after_scan; 1078 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1079 switch (op) { 1080 case P2P_AFTER_SCAN_NOTHING: 1081 break; 1082 case P2P_AFTER_SCAN_LISTEN: 1083 p2p_dbg(p2p, "Start previously requested Listen state"); 1084 p2p_listen(p2p, p2p->pending_listen_sec * 1000 + 1085 p2p->pending_listen_usec / 1000); 1086 return 1; 1087 case P2P_AFTER_SCAN_CONNECT: 1088 p2p_dbg(p2p, "Start previously requested connect with " MACSTR, 1089 MAC2STR(p2p->after_scan_peer)); 1090 dev = p2p_get_device(p2p, p2p->after_scan_peer); 1091 if (dev == NULL) { 1092 p2p_dbg(p2p, "Peer not known anymore"); 1093 break; 1094 } 1095 p2p_connect_send(p2p, dev); 1096 return 1; 1097 } 1098 1099 return 0; 1100 } 1101 1102 1103 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx) 1104 { 1105 struct p2p_data *p2p = eloop_ctx; 1106 int running; 1107 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running); 1108 running = p2p->p2p_scan_running; 1109 /* Make sure we recover from missed scan results callback */ 1110 p2p->p2p_scan_running = 0; 1111 1112 if (running) 1113 p2p_run_after_scan(p2p); 1114 } 1115 1116 1117 static void p2p_free_req_dev_types(struct p2p_data *p2p) 1118 { 1119 p2p->num_req_dev_types = 0; 1120 os_free(p2p->req_dev_types); 1121 p2p->req_dev_types = NULL; 1122 } 1123 1124 1125 static int p2ps_gen_hash(struct p2p_data *p2p, const char *str, u8 *hash) 1126 { 1127 u8 buf[SHA256_MAC_LEN]; 1128 char str_buf[256]; 1129 const u8 *adv_array; 1130 size_t i, adv_len; 1131 1132 if (!str || !hash) 1133 return 0; 1134 1135 if (!str[0]) { 1136 os_memcpy(hash, p2p->wild_card_hash, P2PS_HASH_LEN); 1137 return 1; 1138 } 1139 1140 adv_array = (u8 *) str_buf; 1141 adv_len = os_strlen(str); 1142 if (adv_len >= sizeof(str_buf)) 1143 return 0; 1144 1145 for (i = 0; i < adv_len; i++) { 1146 if (str[i] >= 'A' && str[i] <= 'Z') 1147 str_buf[i] = str[i] - 'A' + 'a'; 1148 else 1149 str_buf[i] = str[i]; 1150 } 1151 1152 if (sha256_vector(1, &adv_array, &adv_len, buf)) 1153 return 0; 1154 1155 os_memcpy(hash, buf, P2PS_HASH_LEN); 1156 return 1; 1157 } 1158 1159 1160 int p2p_find(struct p2p_data *p2p, unsigned int timeout, 1161 enum p2p_discovery_type type, 1162 unsigned int num_req_dev_types, const u8 *req_dev_types, 1163 const u8 *dev_id, unsigned int search_delay, 1164 u8 seek_count, const char **seek, int freq) 1165 { 1166 int res; 1167 1168 p2p_dbg(p2p, "Starting find (type=%d)", type); 1169 os_get_reltime(&p2p->find_start); 1170 if (p2p->p2p_scan_running) { 1171 p2p_dbg(p2p, "p2p_scan is already running"); 1172 } 1173 1174 p2p_free_req_dev_types(p2p); 1175 if (req_dev_types && num_req_dev_types) { 1176 p2p->req_dev_types = os_malloc(num_req_dev_types * 1177 WPS_DEV_TYPE_LEN); 1178 if (p2p->req_dev_types == NULL) 1179 return -1; 1180 os_memcpy(p2p->req_dev_types, req_dev_types, 1181 num_req_dev_types * WPS_DEV_TYPE_LEN); 1182 p2p->num_req_dev_types = num_req_dev_types; 1183 } 1184 1185 if (dev_id) { 1186 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN); 1187 p2p->find_dev_id = p2p->find_dev_id_buf; 1188 } else 1189 p2p->find_dev_id = NULL; 1190 1191 if (seek_count == 0 || !seek) { 1192 /* Not an ASP search */ 1193 p2p->p2ps_seek = 0; 1194 } else if (seek_count == 1 && seek && (!seek[0] || !seek[0][0])) { 1195 /* 1196 * An empty seek string means no hash values, but still an ASP 1197 * search. 1198 */ 1199 p2p_dbg(p2p, "ASP search"); 1200 p2p->p2ps_seek_count = 0; 1201 p2p->p2ps_seek = 1; 1202 } else if (seek && seek_count <= P2P_MAX_QUERY_HASH) { 1203 u8 buf[P2PS_HASH_LEN]; 1204 int i, count = 0; 1205 1206 for (i = 0; i < seek_count; i++) { 1207 if (!p2ps_gen_hash(p2p, seek[i], buf)) 1208 continue; 1209 1210 p2p_dbg(p2p, "Seek service %s hash " MACSTR, 1211 seek[i], MAC2STR(buf)); 1212 os_memcpy(&p2p->p2ps_seek_hash[count * P2PS_HASH_LEN], 1213 buf, P2PS_HASH_LEN); 1214 count++; 1215 } 1216 1217 p2p->p2ps_seek_count = count; 1218 p2p->p2ps_seek = 1; 1219 } else { 1220 p2p->p2ps_seek_count = 0; 1221 p2p->p2ps_seek = 1; 1222 } 1223 1224 /* Special case to perform wildcard search */ 1225 if (p2p->p2ps_seek_count == 0 && p2p->p2ps_seek) { 1226 p2p->p2ps_seek_count = 1; 1227 os_memcpy(&p2p->p2ps_seek_hash, p2p->wild_card_hash, 1228 P2PS_HASH_LEN); 1229 } 1230 1231 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1232 p2p_clear_timeout(p2p); 1233 if (p2p->pending_listen_freq) { 1234 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_find"); 1235 p2p->pending_listen_freq = 0; 1236 } 1237 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1238 p2p->find_type = type; 1239 p2p_device_clear_reported(p2p); 1240 os_memset(p2p->sd_query_no_ack, 0, ETH_ALEN); 1241 p2p_set_state(p2p, P2P_SEARCH); 1242 p2p->search_delay = search_delay; 1243 p2p->in_search_delay = 0; 1244 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1245 p2p->last_p2p_find_timeout = timeout; 1246 if (timeout) 1247 eloop_register_timeout(timeout, 0, p2p_find_timeout, 1248 p2p, NULL); 1249 switch (type) { 1250 case P2P_FIND_START_WITH_FULL: 1251 if (freq > 0) { 1252 /* 1253 * Start with the specified channel and then move to 1254 * social channels only scans. 1255 */ 1256 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, 1257 P2P_SCAN_SPECIFIC, freq, 1258 p2p->num_req_dev_types, 1259 p2p->req_dev_types, dev_id, 1260 DEV_PW_DEFAULT); 1261 break; 1262 } 1263 /* fall through */ 1264 case P2P_FIND_PROGRESSIVE: 1265 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0, 1266 p2p->num_req_dev_types, 1267 p2p->req_dev_types, dev_id, 1268 DEV_PW_DEFAULT); 1269 break; 1270 case P2P_FIND_ONLY_SOCIAL: 1271 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0, 1272 p2p->num_req_dev_types, 1273 p2p->req_dev_types, dev_id, 1274 DEV_PW_DEFAULT); 1275 break; 1276 default: 1277 return -1; 1278 } 1279 1280 if (res != 0 && p2p->p2p_scan_running) { 1281 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running"); 1282 /* wait for the previous p2p_scan to complete */ 1283 res = 0; /* do not report failure */ 1284 } else if (res != 0) { 1285 p2p_dbg(p2p, "Failed to start p2p_scan"); 1286 p2p_set_state(p2p, P2P_IDLE); 1287 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1288 } 1289 1290 return res; 1291 } 1292 1293 1294 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq) 1295 { 1296 p2p_dbg(p2p, "Stopping find"); 1297 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1298 p2p_clear_timeout(p2p); 1299 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND) 1300 p2p->cfg->find_stopped(p2p->cfg->cb_ctx); 1301 1302 p2p->p2ps_seek_count = 0; 1303 1304 p2p_set_state(p2p, P2P_IDLE); 1305 p2p_free_req_dev_types(p2p); 1306 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1307 if (p2p->go_neg_peer) 1308 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1309 p2p->go_neg_peer = NULL; 1310 p2p->sd_peer = NULL; 1311 p2p->invite_peer = NULL; 1312 p2p_stop_listen_for_freq(p2p, freq); 1313 p2p->send_action_in_progress = 0; 1314 } 1315 1316 1317 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq) 1318 { 1319 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) { 1320 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response"); 1321 return; 1322 } 1323 if (p2p->in_listen) { 1324 p2p->in_listen = 0; 1325 p2p_clear_timeout(p2p); 1326 } 1327 if (p2p->drv_in_listen) { 1328 /* 1329 * The driver may not deliver callback to p2p_listen_end() 1330 * when the operation gets canceled, so clear the internal 1331 * variable that is tracking driver state. 1332 */ 1333 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen); 1334 p2p->drv_in_listen = 0; 1335 } 1336 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1337 } 1338 1339 1340 void p2p_stop_listen(struct p2p_data *p2p) 1341 { 1342 if (p2p->state != P2P_LISTEN_ONLY) { 1343 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state."); 1344 return; 1345 } 1346 1347 p2p_stop_listen_for_freq(p2p, 0); 1348 p2p_set_state(p2p, P2P_IDLE); 1349 } 1350 1351 1352 void p2p_stop_find(struct p2p_data *p2p) 1353 { 1354 p2p->pending_listen_freq = 0; 1355 p2p_stop_find_for_freq(p2p, 0); 1356 } 1357 1358 1359 static int p2p_prepare_channel_pref(struct p2p_data *p2p, 1360 unsigned int force_freq, 1361 unsigned int pref_freq, int go) 1362 { 1363 u8 op_class, op_channel; 1364 unsigned int freq = force_freq ? force_freq : pref_freq; 1365 1366 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d", 1367 force_freq, pref_freq, go); 1368 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) { 1369 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq); 1370 return -1; 1371 } 1372 1373 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) && 1374 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class, 1375 op_channel))) { 1376 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P", 1377 freq, op_class, op_channel); 1378 return -1; 1379 } 1380 1381 p2p->op_reg_class = op_class; 1382 p2p->op_channel = op_channel; 1383 1384 if (force_freq) { 1385 p2p->channels.reg_classes = 1; 1386 p2p->channels.reg_class[0].channels = 1; 1387 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 1388 p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 1389 } else { 1390 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1391 sizeof(struct p2p_channels)); 1392 } 1393 1394 return 0; 1395 } 1396 1397 1398 static void p2p_prepare_channel_best(struct p2p_data *p2p) 1399 { 1400 u8 op_class, op_channel; 1401 const int op_classes_5ghz[] = { 124, 125, 115, 0 }; 1402 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 }; 1403 const int op_classes_vht[] = { 128, 0 }; 1404 1405 p2p_dbg(p2p, "Prepare channel best"); 1406 1407 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 && 1408 p2p_supported_freq(p2p, p2p->best_freq_overall) && 1409 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel) 1410 == 0) { 1411 p2p_dbg(p2p, "Select best overall channel as operating channel preference"); 1412 p2p->op_reg_class = op_class; 1413 p2p->op_channel = op_channel; 1414 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 && 1415 p2p_supported_freq(p2p, p2p->best_freq_5) && 1416 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel) 1417 == 0) { 1418 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference"); 1419 p2p->op_reg_class = op_class; 1420 p2p->op_channel = op_channel; 1421 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 && 1422 p2p_supported_freq(p2p, p2p->best_freq_24) && 1423 p2p_freq_to_channel(p2p->best_freq_24, &op_class, 1424 &op_channel) == 0) { 1425 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference"); 1426 p2p->op_reg_class = op_class; 1427 p2p->op_channel = op_channel; 1428 } else if (p2p->cfg->num_pref_chan > 0 && 1429 p2p_channels_includes(&p2p->cfg->channels, 1430 p2p->cfg->pref_chan[0].op_class, 1431 p2p->cfg->pref_chan[0].chan)) { 1432 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference"); 1433 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class; 1434 p2p->op_channel = p2p->cfg->pref_chan[0].chan; 1435 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht, 1436 &p2p->op_reg_class, &p2p->op_channel) == 1437 0) { 1438 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference", 1439 p2p->op_reg_class, p2p->op_channel); 1440 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40, 1441 &p2p->op_reg_class, &p2p->op_channel) == 1442 0) { 1443 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference", 1444 p2p->op_reg_class, p2p->op_channel); 1445 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz, 1446 &p2p->op_reg_class, &p2p->op_channel) == 1447 0) { 1448 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference", 1449 p2p->op_reg_class, p2p->op_channel); 1450 } else if (p2p_channels_includes(&p2p->cfg->channels, 1451 p2p->cfg->op_reg_class, 1452 p2p->cfg->op_channel)) { 1453 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference"); 1454 p2p->op_reg_class = p2p->cfg->op_reg_class; 1455 p2p->op_channel = p2p->cfg->op_channel; 1456 } else if (p2p_channel_random_social(&p2p->cfg->channels, 1457 &p2p->op_reg_class, 1458 &p2p->op_channel) == 0) { 1459 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference", 1460 p2p->op_reg_class, p2p->op_channel); 1461 } else { 1462 /* Select any random available channel from the first available 1463 * operating class */ 1464 p2p_channel_select(&p2p->cfg->channels, NULL, 1465 &p2p->op_reg_class, 1466 &p2p->op_channel); 1467 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference", 1468 p2p->op_channel, p2p->op_reg_class); 1469 } 1470 1471 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1472 sizeof(struct p2p_channels)); 1473 } 1474 1475 1476 /** 1477 * p2p_prepare_channel - Select operating channel for GO Negotiation or P2PS PD 1478 * @p2p: P2P module context from p2p_init() 1479 * @dev: Selected peer device 1480 * @force_freq: Forced frequency in MHz or 0 if not forced 1481 * @pref_freq: Preferred frequency in MHz or 0 if no preference 1482 * @go: Whether the local end will be forced to be GO 1483 * Returns: 0 on success, -1 on failure (channel not supported for P2P) 1484 * 1485 * This function is used to do initial operating channel selection for GO 1486 * Negotiation prior to having received peer information or for P2PS PD 1487 * signalling. The selected channel may be further optimized in 1488 * p2p_reselect_channel() once the peer information is available. 1489 */ 1490 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev, 1491 unsigned int force_freq, unsigned int pref_freq, int go) 1492 { 1493 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d", 1494 force_freq, pref_freq, go); 1495 if (force_freq || pref_freq) { 1496 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) < 1497 0) 1498 return -1; 1499 } else { 1500 p2p_prepare_channel_best(p2p); 1501 } 1502 p2p_channels_dump(p2p, "prepared channels", &p2p->channels); 1503 if (go) 1504 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq); 1505 else if (!force_freq) 1506 p2p_channels_union_inplace(&p2p->channels, 1507 &p2p->cfg->cli_channels); 1508 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels); 1509 1510 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s", 1511 p2p->op_reg_class, p2p->op_channel, 1512 force_freq ? " (forced)" : ""); 1513 1514 if (force_freq) 1515 dev->flags |= P2P_DEV_FORCE_FREQ; 1516 else 1517 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1518 1519 return 0; 1520 } 1521 1522 1523 static void p2p_set_dev_persistent(struct p2p_device *dev, 1524 int persistent_group) 1525 { 1526 switch (persistent_group) { 1527 case 0: 1528 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP | 1529 P2P_DEV_PREFER_PERSISTENT_RECONN); 1530 break; 1531 case 1: 1532 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP; 1533 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN; 1534 break; 1535 case 2: 1536 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP | 1537 P2P_DEV_PREFER_PERSISTENT_RECONN; 1538 break; 1539 } 1540 } 1541 1542 1543 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr, 1544 enum p2p_wps_method wps_method, 1545 int go_intent, const u8 *own_interface_addr, 1546 unsigned int force_freq, int persistent_group, 1547 const u8 *force_ssid, size_t force_ssid_len, 1548 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id) 1549 { 1550 struct p2p_device *dev; 1551 1552 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR 1553 " GO Intent=%d Intended Interface Address=" MACSTR 1554 " wps_method=%d persistent_group=%d pd_before_go_neg=%d " 1555 "oob_pw_id=%u", 1556 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1557 wps_method, persistent_group, pd_before_go_neg, oob_pw_id); 1558 1559 dev = p2p_get_device(p2p, peer_addr); 1560 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 1561 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR, 1562 MAC2STR(peer_addr)); 1563 return -1; 1564 } 1565 1566 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, 1567 go_intent == 15) < 0) 1568 return -1; 1569 1570 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 1571 if (!(dev->info.dev_capab & 1572 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 1573 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1574 " that is in a group and is not discoverable", 1575 MAC2STR(peer_addr)); 1576 return -1; 1577 } 1578 if (dev->oper_freq <= 0) { 1579 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1580 " with incomplete information", 1581 MAC2STR(peer_addr)); 1582 return -1; 1583 } 1584 1585 /* 1586 * First, try to connect directly. If the peer does not 1587 * acknowledge frames, assume it is sleeping and use device 1588 * discoverability via the GO at that point. 1589 */ 1590 } 1591 1592 p2p->ssid_set = 0; 1593 if (force_ssid) { 1594 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1595 force_ssid, force_ssid_len); 1596 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1597 p2p->ssid_len = force_ssid_len; 1598 p2p->ssid_set = 1; 1599 } 1600 1601 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1602 dev->flags &= ~P2P_DEV_USER_REJECTED; 1603 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 1604 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1605 if (pd_before_go_neg) 1606 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG; 1607 else { 1608 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG; 1609 /* 1610 * Assign dialog token and tie breaker here to use the same 1611 * values in each retry within the same GO Negotiation exchange. 1612 */ 1613 dev->dialog_token++; 1614 if (dev->dialog_token == 0) 1615 dev->dialog_token = 1; 1616 dev->tie_breaker = p2p->next_tie_breaker; 1617 p2p->next_tie_breaker = !p2p->next_tie_breaker; 1618 } 1619 dev->connect_reqs = 0; 1620 dev->go_neg_req_sent = 0; 1621 dev->go_state = UNKNOWN_GO; 1622 p2p_set_dev_persistent(dev, persistent_group); 1623 p2p->go_intent = go_intent; 1624 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1625 1626 if (p2p->state != P2P_IDLE) 1627 p2p_stop_find(p2p); 1628 1629 if (p2p->after_scan_tx) { 1630 /* 1631 * We need to drop the pending frame to avoid issues with the 1632 * new GO Negotiation, e.g., when the pending frame was from a 1633 * previous attempt at starting a GO Negotiation. 1634 */ 1635 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion"); 1636 os_free(p2p->after_scan_tx); 1637 p2p->after_scan_tx = NULL; 1638 } 1639 1640 dev->wps_method = wps_method; 1641 dev->oob_pw_id = oob_pw_id; 1642 dev->status = P2P_SC_SUCCESS; 1643 1644 if (p2p->p2p_scan_running) { 1645 p2p_dbg(p2p, "p2p_scan running - delay connect send"); 1646 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT; 1647 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN); 1648 return 0; 1649 } 1650 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1651 1652 return p2p_connect_send(p2p, dev); 1653 } 1654 1655 1656 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr, 1657 enum p2p_wps_method wps_method, 1658 int go_intent, const u8 *own_interface_addr, 1659 unsigned int force_freq, int persistent_group, 1660 const u8 *force_ssid, size_t force_ssid_len, 1661 unsigned int pref_freq, u16 oob_pw_id) 1662 { 1663 struct p2p_device *dev; 1664 1665 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR 1666 " GO Intent=%d Intended Interface Address=" MACSTR 1667 " wps_method=%d persistent_group=%d oob_pw_id=%u", 1668 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1669 wps_method, persistent_group, oob_pw_id); 1670 1671 dev = p2p_get_device(p2p, peer_addr); 1672 if (dev == NULL) { 1673 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR, 1674 MAC2STR(peer_addr)); 1675 return -1; 1676 } 1677 1678 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent == 1679 15) < 0) 1680 return -1; 1681 1682 p2p->ssid_set = 0; 1683 if (force_ssid) { 1684 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1685 force_ssid, force_ssid_len); 1686 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1687 p2p->ssid_len = force_ssid_len; 1688 p2p->ssid_set = 1; 1689 } 1690 1691 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1692 dev->flags &= ~P2P_DEV_USER_REJECTED; 1693 dev->go_neg_req_sent = 0; 1694 dev->go_state = UNKNOWN_GO; 1695 p2p_set_dev_persistent(dev, persistent_group); 1696 p2p->go_intent = go_intent; 1697 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1698 1699 dev->wps_method = wps_method; 1700 dev->oob_pw_id = oob_pw_id; 1701 dev->status = P2P_SC_SUCCESS; 1702 1703 return 0; 1704 } 1705 1706 1707 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr, 1708 struct p2p_device *dev, struct p2p_message *msg) 1709 { 1710 os_get_reltime(&dev->last_seen); 1711 1712 p2p_copy_wps_info(p2p, dev, 0, msg); 1713 1714 if (msg->listen_channel) { 1715 int freq; 1716 freq = p2p_channel_to_freq(msg->listen_channel[3], 1717 msg->listen_channel[4]); 1718 if (freq < 0) { 1719 p2p_dbg(p2p, "Unknown peer Listen channel: " 1720 "country=%c%c(0x%02x) reg_class=%u channel=%u", 1721 msg->listen_channel[0], 1722 msg->listen_channel[1], 1723 msg->listen_channel[2], 1724 msg->listen_channel[3], 1725 msg->listen_channel[4]); 1726 } else { 1727 p2p_dbg(p2p, "Update peer " MACSTR 1728 " Listen channel: %u -> %u MHz", 1729 MAC2STR(dev->info.p2p_device_addr), 1730 dev->listen_freq, freq); 1731 dev->listen_freq = freq; 1732 } 1733 } 1734 1735 if (msg->wfd_subelems) { 1736 wpabuf_free(dev->info.wfd_subelems); 1737 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems); 1738 } 1739 1740 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 1741 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 1742 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request"); 1743 } else { 1744 p2p_dbg(p2p, "Created device entry based on GO Neg Req: " 1745 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' " 1746 "listen_freq=%d", 1747 MAC2STR(dev->info.p2p_device_addr), 1748 dev->info.dev_capab, dev->info.group_capab, 1749 dev->info.device_name, dev->listen_freq); 1750 } 1751 1752 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY; 1753 1754 if (dev->flags & P2P_DEV_USER_REJECTED) { 1755 p2p_dbg(p2p, "Do not report rejected device"); 1756 return; 1757 } 1758 1759 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 1760 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 1761 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 1762 } 1763 1764 1765 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len) 1766 { 1767 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 1768 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2); 1769 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2], 1770 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len); 1771 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len; 1772 } 1773 1774 1775 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params) 1776 { 1777 if (p2p->ssid_set) { 1778 os_memcpy(params->ssid, p2p->ssid, p2p->ssid_len); 1779 params->ssid_len = p2p->ssid_len; 1780 } else { 1781 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len); 1782 } 1783 p2p->ssid_set = 0; 1784 1785 p2p_random(params->passphrase, p2p->cfg->passphrase_len); 1786 return 0; 1787 } 1788 1789 1790 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer) 1791 { 1792 struct p2p_go_neg_results res; 1793 int go = peer->go_state == LOCAL_GO; 1794 struct p2p_channels intersection; 1795 1796 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)", 1797 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer"); 1798 1799 os_memset(&res, 0, sizeof(res)); 1800 res.role_go = go; 1801 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 1802 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 1803 res.wps_method = peer->wps_method; 1804 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 1805 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 1806 res.persistent_group = 2; 1807 else 1808 res.persistent_group = 1; 1809 } 1810 1811 if (go) { 1812 /* Setup AP mode for WPS provisioning */ 1813 res.freq = p2p_channel_to_freq(p2p->op_reg_class, 1814 p2p->op_channel); 1815 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1816 res.ssid_len = p2p->ssid_len; 1817 p2p_random(res.passphrase, p2p->cfg->passphrase_len); 1818 } else { 1819 res.freq = peer->oper_freq; 1820 if (p2p->ssid_len) { 1821 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1822 res.ssid_len = p2p->ssid_len; 1823 } 1824 } 1825 1826 p2p_channels_dump(p2p, "own channels", &p2p->channels); 1827 p2p_channels_dump(p2p, "peer channels", &peer->channels); 1828 p2p_channels_intersect(&p2p->channels, &peer->channels, 1829 &intersection); 1830 if (go) { 1831 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq); 1832 p2p_channels_dump(p2p, "intersection after no-GO removal", 1833 &intersection); 1834 } 1835 1836 p2p_channels_to_freqs(&intersection, res.freq_list, 1837 P2P_MAX_CHANNELS); 1838 1839 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout; 1840 1841 p2p_clear_timeout(p2p); 1842 p2p->ssid_set = 0; 1843 peer->go_neg_req_sent = 0; 1844 peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1845 peer->wps_method = WPS_NOT_READY; 1846 peer->oob_pw_id = 0; 1847 wpabuf_free(peer->go_neg_conf); 1848 peer->go_neg_conf = NULL; 1849 1850 p2p_set_state(p2p, P2P_PROVISIONING); 1851 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 1852 } 1853 1854 1855 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa, 1856 const u8 *data, size_t len, int rx_freq) 1857 { 1858 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa)); 1859 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len); 1860 1861 if (len < 1) 1862 return; 1863 1864 switch (data[0]) { 1865 case P2P_GO_NEG_REQ: 1866 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq); 1867 break; 1868 case P2P_GO_NEG_RESP: 1869 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq); 1870 break; 1871 case P2P_GO_NEG_CONF: 1872 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1); 1873 break; 1874 case P2P_INVITATION_REQ: 1875 p2p_process_invitation_req(p2p, sa, data + 1, len - 1, 1876 rx_freq); 1877 break; 1878 case P2P_INVITATION_RESP: 1879 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1); 1880 break; 1881 case P2P_PROV_DISC_REQ: 1882 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1883 break; 1884 case P2P_PROV_DISC_RESP: 1885 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1); 1886 break; 1887 case P2P_DEV_DISC_REQ: 1888 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1889 break; 1890 case P2P_DEV_DISC_RESP: 1891 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1); 1892 break; 1893 default: 1894 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d", 1895 data[0]); 1896 break; 1897 } 1898 } 1899 1900 1901 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, 1902 const u8 *sa, const u8 *bssid, const u8 *data, 1903 size_t len, int freq) 1904 { 1905 if (len < 1) 1906 return; 1907 1908 switch (data[0]) { 1909 case WLAN_PA_VENDOR_SPECIFIC: 1910 data++; 1911 len--; 1912 if (len < 4) 1913 return; 1914 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1915 return; 1916 1917 data += 4; 1918 len -= 4; 1919 1920 p2p_rx_p2p_action(p2p, sa, data, len, freq); 1921 break; 1922 case WLAN_PA_GAS_INITIAL_REQ: 1923 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq); 1924 break; 1925 case WLAN_PA_GAS_INITIAL_RESP: 1926 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq); 1927 break; 1928 case WLAN_PA_GAS_COMEBACK_REQ: 1929 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq); 1930 break; 1931 case WLAN_PA_GAS_COMEBACK_RESP: 1932 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq); 1933 break; 1934 } 1935 } 1936 1937 1938 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa, 1939 const u8 *bssid, u8 category, 1940 const u8 *data, size_t len, int freq) 1941 { 1942 if (category == WLAN_ACTION_PUBLIC) { 1943 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq); 1944 return; 1945 } 1946 1947 if (category != WLAN_ACTION_VENDOR_SPECIFIC) 1948 return; 1949 1950 if (len < 4) 1951 return; 1952 1953 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1954 return; 1955 data += 4; 1956 len -= 4; 1957 1958 /* P2P action frame */ 1959 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa)); 1960 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len); 1961 1962 if (len < 1) 1963 return; 1964 switch (data[0]) { 1965 case P2P_NOA: 1966 p2p_dbg(p2p, "Received P2P Action - Notice of Absence"); 1967 /* TODO */ 1968 break; 1969 case P2P_PRESENCE_REQ: 1970 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq); 1971 break; 1972 case P2P_PRESENCE_RESP: 1973 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1); 1974 break; 1975 case P2P_GO_DISC_REQ: 1976 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq); 1977 break; 1978 default: 1979 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]); 1980 break; 1981 } 1982 } 1983 1984 1985 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx) 1986 { 1987 struct p2p_data *p2p = eloop_ctx; 1988 if (p2p->go_neg_peer == NULL) 1989 return; 1990 if (p2p->pending_listen_freq) { 1991 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start"); 1992 p2p->pending_listen_freq = 0; 1993 } 1994 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1995 p2p->go_neg_peer->status = P2P_SC_SUCCESS; 1996 /* 1997 * Set new timeout to make sure a previously set one does not expire 1998 * too quickly while waiting for the GO Negotiation to complete. 1999 */ 2000 p2p_set_timeout(p2p, 0, 500000); 2001 p2p_connect_send(p2p, p2p->go_neg_peer); 2002 } 2003 2004 2005 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx) 2006 { 2007 struct p2p_data *p2p = eloop_ctx; 2008 if (p2p->invite_peer == NULL) 2009 return; 2010 if (p2p->pending_listen_freq) { 2011 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start"); 2012 p2p->pending_listen_freq = 0; 2013 } 2014 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 2015 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr, 2016 p2p->invite_dev_pw_id); 2017 } 2018 2019 2020 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr, 2021 const u8 *ie, size_t ie_len) 2022 { 2023 struct p2p_message msg; 2024 struct p2p_device *dev; 2025 2026 os_memset(&msg, 0, sizeof(msg)); 2027 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL) 2028 { 2029 p2p_parse_free(&msg); 2030 return; /* not a P2P probe */ 2031 } 2032 2033 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 2034 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 2035 != 0) { 2036 /* The Probe Request is not part of P2P Device Discovery. It is 2037 * not known whether the source address of the frame is the P2P 2038 * Device Address or P2P Interface Address. Do not add a new 2039 * peer entry based on this frames. 2040 */ 2041 p2p_parse_free(&msg); 2042 return; 2043 } 2044 2045 dev = p2p_get_device(p2p, addr); 2046 if (dev) { 2047 if (msg.listen_channel) { 2048 int freq; 2049 2050 if (dev->country[0] == 0) 2051 os_memcpy(dev->country, msg.listen_channel, 3); 2052 2053 freq = p2p_channel_to_freq(msg.listen_channel[3], 2054 msg.listen_channel[4]); 2055 2056 if (freq > 0 && dev->listen_freq != freq) { 2057 p2p_dbg(p2p, 2058 "Updated peer " MACSTR " Listen channel (Probe Request): %d -> %d MHz", 2059 MAC2STR(addr), dev->listen_freq, freq); 2060 dev->listen_freq = freq; 2061 } 2062 } 2063 2064 os_get_reltime(&dev->last_seen); 2065 p2p_parse_free(&msg); 2066 return; /* already known */ 2067 } 2068 2069 dev = p2p_create_device(p2p, addr); 2070 if (dev == NULL) { 2071 p2p_parse_free(&msg); 2072 return; 2073 } 2074 2075 os_get_reltime(&dev->last_seen); 2076 dev->flags |= P2P_DEV_PROBE_REQ_ONLY; 2077 2078 if (msg.listen_channel) { 2079 os_memcpy(dev->country, msg.listen_channel, 3); 2080 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3], 2081 msg.listen_channel[4]); 2082 } 2083 2084 p2p_copy_wps_info(p2p, dev, 1, &msg); 2085 2086 if (msg.wfd_subelems) { 2087 wpabuf_free(dev->info.wfd_subelems); 2088 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 2089 } 2090 2091 p2p_parse_free(&msg); 2092 2093 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR 2094 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d", 2095 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab, 2096 dev->info.group_capab, dev->info.device_name, 2097 dev->listen_freq); 2098 } 2099 2100 2101 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p, 2102 const u8 *addr, 2103 struct p2p_message *msg) 2104 { 2105 struct p2p_device *dev; 2106 2107 dev = p2p_get_device(p2p, addr); 2108 if (dev) { 2109 os_get_reltime(&dev->last_seen); 2110 return dev; /* already known */ 2111 } 2112 2113 dev = p2p_create_device(p2p, addr); 2114 if (dev == NULL) 2115 return NULL; 2116 2117 p2p_add_dev_info(p2p, addr, dev, msg); 2118 2119 return dev; 2120 } 2121 2122 2123 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type) 2124 { 2125 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0) 2126 return 1; 2127 if (os_memcmp(dev_type, req_dev_type, 2) == 0 && 2128 WPA_GET_BE32(&req_dev_type[2]) == 0 && 2129 WPA_GET_BE16(&req_dev_type[6]) == 0) 2130 return 1; /* Category match with wildcard OUI/sub-category */ 2131 return 0; 2132 } 2133 2134 2135 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[], 2136 size_t num_req_dev_type) 2137 { 2138 size_t i; 2139 for (i = 0; i < num_req_dev_type; i++) { 2140 if (dev_type_match(dev_type, req_dev_type[i])) 2141 return 1; 2142 } 2143 return 0; 2144 } 2145 2146 2147 /** 2148 * p2p_match_dev_type - Match local device type with requested type 2149 * @p2p: P2P module context from p2p_init() 2150 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) 2151 * Returns: 1 on match, 0 on mismatch 2152 * 2153 * This function can be used to match the Requested Device Type attribute in 2154 * WPS IE with the local device types for deciding whether to reply to a Probe 2155 * Request frame. 2156 */ 2157 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps) 2158 { 2159 struct wps_parse_attr attr; 2160 size_t i; 2161 2162 if (wps_parse_msg(wps, &attr)) 2163 return 1; /* assume no Requested Device Type attributes */ 2164 2165 if (attr.num_req_dev_type == 0) 2166 return 1; /* no Requested Device Type attributes -> match */ 2167 2168 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type, 2169 attr.num_req_dev_type)) 2170 return 1; /* Own Primary Device Type matches */ 2171 2172 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) { 2173 if (dev_type_list_match(p2p->cfg->sec_dev_type[i], 2174 attr.req_dev_type, 2175 attr.num_req_dev_type)) 2176 return 1; /* Own Secondary Device Type matches */ 2177 } 2178 2179 /* No matching device type found */ 2180 return 0; 2181 } 2182 2183 2184 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p, 2185 const u8 *query_hash, 2186 u8 query_count) 2187 { 2188 struct wpabuf *buf; 2189 u8 *len; 2190 int pw_id = -1; 2191 size_t extra = 0; 2192 2193 #ifdef CONFIG_WIFI_DISPLAY 2194 if (p2p->wfd_ie_probe_resp) 2195 extra = wpabuf_len(p2p->wfd_ie_probe_resp); 2196 #endif /* CONFIG_WIFI_DISPLAY */ 2197 2198 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]) 2199 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]); 2200 2201 if (query_count) 2202 extra += MAX_SVC_ADV_IE_LEN; 2203 2204 buf = wpabuf_alloc(1000 + extra); 2205 if (buf == NULL) 2206 return NULL; 2207 2208 if (p2p->go_neg_peer) { 2209 /* Advertise immediate availability of WPS credential */ 2210 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method); 2211 } 2212 2213 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) { 2214 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response"); 2215 wpabuf_free(buf); 2216 return NULL; 2217 } 2218 2219 #ifdef CONFIG_WIFI_DISPLAY 2220 if (p2p->wfd_ie_probe_resp) 2221 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp); 2222 #endif /* CONFIG_WIFI_DISPLAY */ 2223 2224 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]) 2225 wpabuf_put_buf(buf, 2226 p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]); 2227 2228 /* P2P IE */ 2229 len = p2p_buf_add_ie_hdr(buf); 2230 p2p_buf_add_capability(buf, p2p->dev_capab & 2231 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2232 if (p2p->ext_listen_interval) 2233 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 2234 p2p->ext_listen_interval); 2235 p2p_buf_add_device_info(buf, p2p, NULL); 2236 p2p_buf_update_ie_hdr(buf, len); 2237 2238 if (query_count) { 2239 p2p_buf_add_service_instance(buf, p2p, query_count, query_hash, 2240 p2p->p2ps_adv_list); 2241 } 2242 2243 return buf; 2244 } 2245 2246 static int p2p_build_probe_resp_buf(struct p2p_data *p2p, struct wpabuf *buf, 2247 struct wpabuf *ies, 2248 const u8 *addr, int rx_freq) 2249 { 2250 struct ieee80211_mgmt *resp; 2251 u8 channel, op_class; 2252 2253 resp = wpabuf_put(buf, offsetof(struct ieee80211_mgmt, 2254 u.probe_resp.variable)); 2255 2256 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 2257 (WLAN_FC_STYPE_PROBE_RESP << 4)); 2258 os_memcpy(resp->da, addr, ETH_ALEN); 2259 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN); 2260 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN); 2261 resp->u.probe_resp.beacon_int = host_to_le16(100); 2262 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 2263 resp->u.probe_resp.capab_info = 2264 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE | 2265 WLAN_CAPABILITY_PRIVACY | 2266 WLAN_CAPABILITY_SHORT_SLOT_TIME); 2267 2268 wpabuf_put_u8(buf, WLAN_EID_SSID); 2269 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN); 2270 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 2271 2272 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES); 2273 wpabuf_put_u8(buf, 8); 2274 wpabuf_put_u8(buf, (60 / 5) | 0x80); 2275 wpabuf_put_u8(buf, 90 / 5); 2276 wpabuf_put_u8(buf, (120 / 5) | 0x80); 2277 wpabuf_put_u8(buf, 180 / 5); 2278 wpabuf_put_u8(buf, (240 / 5) | 0x80); 2279 wpabuf_put_u8(buf, 360 / 5); 2280 wpabuf_put_u8(buf, 480 / 5); 2281 wpabuf_put_u8(buf, 540 / 5); 2282 2283 if (!rx_freq) { 2284 channel = p2p->cfg->channel; 2285 } else if (p2p_freq_to_channel(rx_freq, &op_class, &channel)) { 2286 p2p_err(p2p, "Failed to convert freq to channel"); 2287 return -1; 2288 } 2289 2290 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS); 2291 wpabuf_put_u8(buf, 1); 2292 wpabuf_put_u8(buf, channel); 2293 2294 wpabuf_put_buf(buf, ies); 2295 2296 return 0; 2297 } 2298 2299 static int p2p_service_find_asp(struct p2p_data *p2p, const u8 *hash) 2300 { 2301 struct p2ps_advertisement *adv_data; 2302 int any_wfa; 2303 2304 p2p_dbg(p2p, "ASP find - ASP list: %p", p2p->p2ps_adv_list); 2305 2306 /* Wildcard org.wi-fi.wfds matches any WFA spec defined service */ 2307 any_wfa = os_memcmp(hash, p2p->wild_card_hash, P2PS_HASH_LEN) == 0; 2308 2309 adv_data = p2p->p2ps_adv_list; 2310 while (adv_data) { 2311 if (os_memcmp(hash, adv_data->hash, P2PS_HASH_LEN) == 0) 2312 return 1; /* exact hash match */ 2313 if (any_wfa && 2314 os_strncmp(adv_data->svc_name, P2PS_WILD_HASH_STR, 2315 os_strlen(P2PS_WILD_HASH_STR)) == 0) 2316 return 1; /* WFA service match */ 2317 adv_data = adv_data->next; 2318 } 2319 2320 return 0; 2321 } 2322 2323 2324 static enum p2p_probe_req_status 2325 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2326 const u8 *bssid, const u8 *ie, size_t ie_len, 2327 unsigned int rx_freq) 2328 { 2329 struct ieee802_11_elems elems; 2330 struct wpabuf *buf; 2331 struct p2p_message msg; 2332 struct wpabuf *ies; 2333 2334 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) == 2335 ParseFailed) { 2336 /* Ignore invalid Probe Request frames */ 2337 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it"); 2338 return P2P_PREQ_MALFORMED; 2339 } 2340 2341 if (elems.p2p == NULL) { 2342 /* not a P2P probe - ignore it */ 2343 p2p_dbg(p2p, "Not a P2P probe - ignore it"); 2344 return P2P_PREQ_NOT_P2P; 2345 } 2346 2347 if (dst && !is_broadcast_ether_addr(dst) && 2348 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2349 /* Not sent to the broadcast address or our P2P Device Address 2350 */ 2351 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it", 2352 MAC2STR(dst)); 2353 return P2P_PREQ_NOT_PROCESSED; 2354 } 2355 2356 if (bssid && !is_broadcast_ether_addr(bssid)) { 2357 /* Not sent to the Wildcard BSSID */ 2358 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it", 2359 MAC2STR(bssid)); 2360 return P2P_PREQ_NOT_PROCESSED; 2361 } 2362 2363 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN || 2364 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) != 2365 0) { 2366 /* not using P2P Wildcard SSID - ignore */ 2367 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it"); 2368 return P2P_PREQ_NOT_PROCESSED; 2369 } 2370 2371 if (supp_rates_11b_only(&elems)) { 2372 /* Indicates support for 11b rates only */ 2373 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it"); 2374 return P2P_PREQ_NOT_P2P; 2375 } 2376 2377 os_memset(&msg, 0, sizeof(msg)); 2378 if (p2p_parse_ies(ie, ie_len, &msg) < 0) { 2379 /* Could not parse P2P attributes */ 2380 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it"); 2381 return P2P_PREQ_NOT_P2P; 2382 } 2383 2384 if (msg.service_hash && msg.service_hash_count) { 2385 const u8 *hash = msg.service_hash; 2386 u8 i; 2387 int p2ps_svc_found = 0; 2388 2389 p2p_dbg(p2p, "in_listen=%d drv_in_listen=%d when received P2PS Probe Request at %u MHz; own Listen channel %u, pending listen freq %u MHz", 2390 p2p->in_listen, p2p->drv_in_listen, rx_freq, 2391 p2p->cfg->channel, p2p->pending_listen_freq); 2392 2393 if (!p2p->in_listen && !p2p->drv_in_listen && 2394 p2p->pending_listen_freq && rx_freq && 2395 rx_freq != p2p->pending_listen_freq) { 2396 p2p_dbg(p2p, "Do not reply to Probe Request frame that was received on %u MHz while waiting to start Listen state on %u MHz", 2397 rx_freq, p2p->pending_listen_freq); 2398 p2p_parse_free(&msg); 2399 return P2P_PREQ_NOT_LISTEN; 2400 } 2401 2402 for (i = 0; i < msg.service_hash_count; i++) { 2403 if (p2p_service_find_asp(p2p, hash)) { 2404 p2p_dbg(p2p, "Service Hash match found: " 2405 MACSTR, MAC2STR(hash)); 2406 p2ps_svc_found = 1; 2407 break; 2408 } 2409 hash += P2PS_HASH_LEN; 2410 } 2411 2412 /* Probed hash unknown */ 2413 if (!p2ps_svc_found) { 2414 p2p_dbg(p2p, "No Service Hash match found"); 2415 p2p_parse_free(&msg); 2416 return P2P_PREQ_NOT_PROCESSED; 2417 } 2418 } else { 2419 /* This is not a P2PS Probe Request */ 2420 p2p_dbg(p2p, "No P2PS Hash in Probe Request"); 2421 2422 if (!p2p->in_listen || !p2p->drv_in_listen) { 2423 /* not in Listen state - ignore Probe Request */ 2424 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request", 2425 p2p->in_listen, p2p->drv_in_listen); 2426 p2p_parse_free(&msg); 2427 return P2P_PREQ_NOT_LISTEN; 2428 } 2429 } 2430 2431 if (msg.device_id && 2432 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2433 /* Device ID did not match */ 2434 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it", 2435 MAC2STR(msg.device_id)); 2436 p2p_parse_free(&msg); 2437 return P2P_PREQ_NOT_PROCESSED; 2438 } 2439 2440 /* Check Requested Device Type match */ 2441 if (msg.wps_attributes && 2442 !p2p_match_dev_type(p2p, msg.wps_attributes)) { 2443 /* No match with Requested Device Type */ 2444 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it"); 2445 p2p_parse_free(&msg); 2446 return P2P_PREQ_NOT_PROCESSED; 2447 } 2448 2449 if (!p2p->cfg->send_probe_resp) { 2450 /* Response generated elsewhere */ 2451 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response"); 2452 p2p_parse_free(&msg); 2453 return P2P_PREQ_NOT_PROCESSED; 2454 } 2455 2456 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state"); 2457 2458 /* 2459 * We do not really have a specific BSS that this frame is advertising, 2460 * so build a frame that has some information in valid format. This is 2461 * really only used for discovery purposes, not to learn exact BSS 2462 * parameters. 2463 */ 2464 ies = p2p_build_probe_resp_ies(p2p, msg.service_hash, 2465 msg.service_hash_count); 2466 p2p_parse_free(&msg); 2467 if (ies == NULL) 2468 return P2P_PREQ_NOT_PROCESSED; 2469 2470 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 2471 if (buf == NULL) { 2472 wpabuf_free(ies); 2473 return P2P_PREQ_NOT_PROCESSED; 2474 } 2475 2476 if (p2p_build_probe_resp_buf(p2p, buf, ies, addr, rx_freq)) { 2477 wpabuf_free(ies); 2478 wpabuf_free(buf); 2479 return P2P_PREQ_NOT_PROCESSED; 2480 } 2481 2482 wpabuf_free(ies); 2483 2484 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf, rx_freq); 2485 2486 wpabuf_free(buf); 2487 2488 return P2P_PREQ_PROCESSED; 2489 } 2490 2491 2492 enum p2p_probe_req_status 2493 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2494 const u8 *bssid, const u8 *ie, size_t ie_len, 2495 unsigned int rx_freq, int p2p_lo_started) 2496 { 2497 enum p2p_probe_req_status res; 2498 2499 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len); 2500 2501 if (p2p_lo_started) { 2502 p2p_dbg(p2p, 2503 "Probe Response is offloaded, do not reply Probe Request"); 2504 return P2P_PREQ_PROCESSED; 2505 } 2506 2507 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len, rx_freq); 2508 if (res != P2P_PREQ_PROCESSED && res != P2P_PREQ_NOT_PROCESSED) 2509 return res; 2510 2511 /* 2512 * Activate a pending GO Negotiation/Invite flow if a received Probe 2513 * Request frame is from an expected peer. Some devices may share the 2514 * same address for P2P and non-P2P STA running simultaneously. The 2515 * P2P_PREQ_PROCESSED and P2P_PREQ_NOT_PROCESSED p2p_reply_probe() 2516 * return values verified above ensure we are handling a Probe Request 2517 * frame from a P2P peer. 2518 */ 2519 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) && 2520 p2p->go_neg_peer && 2521 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN) 2522 == 0 && 2523 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 2524 /* Received a Probe Request from GO Negotiation peer */ 2525 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout"); 2526 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2527 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL); 2528 return res; 2529 } 2530 2531 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) && 2532 p2p->invite_peer && 2533 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) && 2534 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN) 2535 == 0) { 2536 /* Received a Probe Request from Invite peer */ 2537 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout"); 2538 eloop_cancel_timeout(p2p_invite_start, p2p, NULL); 2539 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL); 2540 return res; 2541 } 2542 2543 return res; 2544 } 2545 2546 2547 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid, 2548 u8 *buf, size_t len, struct wpabuf *p2p_ie) 2549 { 2550 struct wpabuf *tmp; 2551 u8 *lpos; 2552 size_t tmplen; 2553 int res; 2554 u8 group_capab; 2555 struct p2p_message msg; 2556 2557 if (p2p_ie == NULL) 2558 return 0; /* WLAN AP is not a P2P manager */ 2559 2560 os_memset(&msg, 0, sizeof(msg)); 2561 if (p2p_parse_p2p_ie(p2p_ie, &msg) < 0) 2562 return 0; 2563 2564 p2p_dbg(p2p, "BSS P2P manageability %s", 2565 msg.manageability ? "enabled" : "disabled"); 2566 2567 if (!msg.manageability) 2568 return 0; 2569 2570 /* 2571 * (Re)Association Request - P2P IE 2572 * P2P Capability attribute (shall be present) 2573 * P2P Interface attribute (present if concurrent device and 2574 * P2P Management is enabled) 2575 */ 2576 tmp = wpabuf_alloc(200); 2577 if (tmp == NULL) 2578 return -1; 2579 2580 lpos = p2p_buf_add_ie_hdr(tmp); 2581 group_capab = 0; 2582 if (p2p->num_groups > 0) { 2583 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; 2584 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2585 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) && 2586 p2p->cross_connect) 2587 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 2588 } 2589 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab); 2590 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2591 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED)) 2592 p2p_buf_add_p2p_interface(tmp, p2p); 2593 p2p_buf_update_ie_hdr(tmp, lpos); 2594 2595 tmplen = wpabuf_len(tmp); 2596 if (tmplen > len) 2597 res = -1; 2598 else { 2599 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2600 res = tmplen; 2601 } 2602 wpabuf_free(tmp); 2603 2604 return res; 2605 } 2606 2607 2608 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf, 2609 size_t len, int p2p_group, struct wpabuf *p2p_ie) 2610 { 2611 struct wpabuf *tmp; 2612 u8 *lpos; 2613 struct p2p_device *peer; 2614 size_t tmplen; 2615 int res; 2616 size_t extra = 0; 2617 2618 if (!p2p_group) 2619 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie); 2620 2621 #ifdef CONFIG_WIFI_DISPLAY 2622 if (p2p->wfd_ie_assoc_req) 2623 extra = wpabuf_len(p2p->wfd_ie_assoc_req); 2624 #endif /* CONFIG_WIFI_DISPLAY */ 2625 2626 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]) 2627 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]); 2628 2629 /* 2630 * (Re)Association Request - P2P IE 2631 * P2P Capability attribute (shall be present) 2632 * Extended Listen Timing (may be present) 2633 * P2P Device Info attribute (shall be present) 2634 */ 2635 tmp = wpabuf_alloc(200 + extra); 2636 if (tmp == NULL) 2637 return -1; 2638 2639 #ifdef CONFIG_WIFI_DISPLAY 2640 if (p2p->wfd_ie_assoc_req) 2641 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req); 2642 #endif /* CONFIG_WIFI_DISPLAY */ 2643 2644 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]) 2645 wpabuf_put_buf(tmp, 2646 p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]); 2647 2648 peer = bssid ? p2p_get_device(p2p, bssid) : NULL; 2649 2650 lpos = p2p_buf_add_ie_hdr(tmp); 2651 p2p_buf_add_capability(tmp, p2p->dev_capab, 0); 2652 if (p2p->ext_listen_interval) 2653 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period, 2654 p2p->ext_listen_interval); 2655 p2p_buf_add_device_info(tmp, p2p, peer); 2656 p2p_buf_update_ie_hdr(tmp, lpos); 2657 2658 tmplen = wpabuf_len(tmp); 2659 if (tmplen > len) 2660 res = -1; 2661 else { 2662 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2663 res = tmplen; 2664 } 2665 wpabuf_free(tmp); 2666 2667 return res; 2668 } 2669 2670 2671 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) 2672 { 2673 struct wpabuf *p2p_ie; 2674 int ret; 2675 2676 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); 2677 if (p2p_ie == NULL) 2678 return 0; 2679 2680 ret = p2p_attr_text(p2p_ie, buf, end); 2681 wpabuf_free(p2p_ie); 2682 return ret; 2683 } 2684 2685 2686 struct p2ps_advertisement * 2687 p2p_service_p2ps_id(struct p2p_data *p2p, u32 adv_id) 2688 { 2689 struct p2ps_advertisement *adv_data; 2690 2691 if (!p2p) 2692 return NULL; 2693 2694 adv_data = p2p->p2ps_adv_list; 2695 while (adv_data) { 2696 if (adv_data->id == adv_id) 2697 return adv_data; 2698 adv_data = adv_data->next; 2699 } 2700 2701 return NULL; 2702 } 2703 2704 2705 int p2p_service_del_asp(struct p2p_data *p2p, u32 adv_id) 2706 { 2707 struct p2ps_advertisement *adv_data; 2708 struct p2ps_advertisement **prior; 2709 2710 if (!p2p) 2711 return -1; 2712 2713 adv_data = p2p->p2ps_adv_list; 2714 prior = &p2p->p2ps_adv_list; 2715 while (adv_data) { 2716 if (adv_data->id == adv_id) { 2717 p2p_dbg(p2p, "Delete ASP adv_id=0x%x", adv_id); 2718 *prior = adv_data->next; 2719 os_free(adv_data); 2720 return 0; 2721 } 2722 prior = &adv_data->next; 2723 adv_data = adv_data->next; 2724 } 2725 2726 return -1; 2727 } 2728 2729 2730 int p2p_service_add_asp(struct p2p_data *p2p, int auto_accept, u32 adv_id, 2731 const char *adv_str, u8 svc_state, u16 config_methods, 2732 const char *svc_info, const u8 *cpt_priority) 2733 { 2734 struct p2ps_advertisement *adv_data, *tmp, **prev; 2735 u8 buf[P2PS_HASH_LEN]; 2736 size_t adv_data_len, adv_len, info_len = 0; 2737 int i; 2738 2739 if (!p2p || !adv_str || !adv_str[0] || !cpt_priority) 2740 return -1; 2741 2742 if (!(config_methods & p2p->cfg->config_methods)) { 2743 p2p_dbg(p2p, "Config methods not supported svc: 0x%x dev: 0x%x", 2744 config_methods, p2p->cfg->config_methods); 2745 return -1; 2746 } 2747 2748 if (!p2ps_gen_hash(p2p, adv_str, buf)) 2749 return -1; 2750 2751 if (svc_info) 2752 info_len = os_strlen(svc_info); 2753 adv_len = os_strlen(adv_str); 2754 adv_data_len = sizeof(struct p2ps_advertisement) + adv_len + 1 + 2755 info_len + 1; 2756 2757 adv_data = os_zalloc(adv_data_len); 2758 if (!adv_data) 2759 return -1; 2760 2761 os_memcpy(adv_data->hash, buf, P2PS_HASH_LEN); 2762 adv_data->id = adv_id; 2763 adv_data->state = svc_state; 2764 adv_data->config_methods = config_methods & p2p->cfg->config_methods; 2765 adv_data->auto_accept = (u8) auto_accept; 2766 os_memcpy(adv_data->svc_name, adv_str, adv_len); 2767 2768 for (i = 0; cpt_priority[i] && i < P2PS_FEATURE_CAPAB_CPT_MAX; i++) { 2769 adv_data->cpt_priority[i] = cpt_priority[i]; 2770 adv_data->cpt_mask |= cpt_priority[i]; 2771 } 2772 2773 if (svc_info && info_len) { 2774 adv_data->svc_info = &adv_data->svc_name[adv_len + 1]; 2775 os_memcpy(adv_data->svc_info, svc_info, info_len); 2776 } 2777 2778 /* 2779 * Group Advertisements by service string. They do not need to be 2780 * sorted, but groups allow easier Probe Response instance grouping 2781 */ 2782 tmp = p2p->p2ps_adv_list; 2783 prev = &p2p->p2ps_adv_list; 2784 while (tmp) { 2785 if (tmp->id == adv_data->id) { 2786 if (os_strcmp(tmp->svc_name, adv_data->svc_name) != 0) { 2787 os_free(adv_data); 2788 return -1; 2789 } 2790 adv_data->next = tmp->next; 2791 *prev = adv_data; 2792 os_free(tmp); 2793 goto inserted; 2794 } else { 2795 if (os_strcmp(tmp->svc_name, adv_data->svc_name) == 0) { 2796 adv_data->next = tmp->next; 2797 tmp->next = adv_data; 2798 goto inserted; 2799 } 2800 } 2801 prev = &tmp->next; 2802 tmp = tmp->next; 2803 } 2804 2805 /* No svc_name match found */ 2806 adv_data->next = p2p->p2ps_adv_list; 2807 p2p->p2ps_adv_list = adv_data; 2808 2809 inserted: 2810 p2p_dbg(p2p, 2811 "Added ASP advertisement adv_id=0x%x config_methods=0x%x svc_state=0x%x adv_str='%s' cpt_mask=0x%x", 2812 adv_id, adv_data->config_methods, svc_state, adv_str, 2813 adv_data->cpt_mask); 2814 2815 return 0; 2816 } 2817 2818 2819 void p2p_service_flush_asp(struct p2p_data *p2p) 2820 { 2821 struct p2ps_advertisement *adv, *prev; 2822 2823 if (!p2p) 2824 return; 2825 2826 adv = p2p->p2ps_adv_list; 2827 while (adv) { 2828 prev = adv; 2829 adv = adv->next; 2830 os_free(prev); 2831 } 2832 2833 p2p->p2ps_adv_list = NULL; 2834 p2ps_prov_free(p2p); 2835 p2p_dbg(p2p, "All ASP advertisements flushed"); 2836 } 2837 2838 2839 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr) 2840 { 2841 struct p2p_message msg; 2842 2843 os_memset(&msg, 0, sizeof(msg)); 2844 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 2845 return -1; 2846 2847 if (msg.p2p_device_addr) { 2848 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); 2849 return 0; 2850 } else if (msg.device_id) { 2851 os_memcpy(dev_addr, msg.device_id, ETH_ALEN); 2852 return 0; 2853 } 2854 return -1; 2855 } 2856 2857 2858 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr) 2859 { 2860 struct wpabuf *p2p_ie; 2861 int ret; 2862 2863 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 2864 P2P_IE_VENDOR_TYPE); 2865 if (p2p_ie == NULL) 2866 return -1; 2867 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr); 2868 wpabuf_free(p2p_ie); 2869 return ret; 2870 } 2871 2872 2873 static void p2p_clear_go_neg(struct p2p_data *p2p) 2874 { 2875 p2p->go_neg_peer = NULL; 2876 p2p_clear_timeout(p2p); 2877 p2p_set_state(p2p, P2P_IDLE); 2878 } 2879 2880 2881 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr) 2882 { 2883 if (p2p->go_neg_peer == NULL) { 2884 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification"); 2885 return; /* No pending Group Formation */ 2886 } 2887 2888 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) != 2889 0) { 2890 p2p_dbg(p2p, "Ignore WPS registration success notification for " 2891 MACSTR " (GO Negotiation peer " MACSTR ")", 2892 MAC2STR(mac_addr), 2893 MAC2STR(p2p->go_neg_peer->intended_addr)); 2894 return; /* Ignore unexpected peer address */ 2895 } 2896 2897 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR, 2898 MAC2STR(mac_addr)); 2899 2900 p2p_clear_go_neg(p2p); 2901 } 2902 2903 2904 void p2p_group_formation_failed(struct p2p_data *p2p) 2905 { 2906 if (p2p->go_neg_peer == NULL) { 2907 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification"); 2908 return; /* No pending Group Formation */ 2909 } 2910 2911 p2p_dbg(p2p, "Group Formation failed with " MACSTR, 2912 MAC2STR(p2p->go_neg_peer->intended_addr)); 2913 2914 p2p_clear_go_neg(p2p); 2915 } 2916 2917 2918 struct p2p_data * p2p_init(const struct p2p_config *cfg) 2919 { 2920 struct p2p_data *p2p; 2921 2922 if (cfg->max_peers < 1 || 2923 cfg->passphrase_len < 8 || cfg->passphrase_len > 63) 2924 return NULL; 2925 2926 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg)); 2927 if (p2p == NULL) 2928 return NULL; 2929 p2p->cfg = (struct p2p_config *) (p2p + 1); 2930 os_memcpy(p2p->cfg, cfg, sizeof(*cfg)); 2931 if (cfg->dev_name) 2932 p2p->cfg->dev_name = os_strdup(cfg->dev_name); 2933 if (cfg->manufacturer) 2934 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer); 2935 if (cfg->model_name) 2936 p2p->cfg->model_name = os_strdup(cfg->model_name); 2937 if (cfg->model_number) 2938 p2p->cfg->model_number = os_strdup(cfg->model_number); 2939 if (cfg->serial_number) 2940 p2p->cfg->serial_number = os_strdup(cfg->serial_number); 2941 if (cfg->pref_chan) { 2942 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan * 2943 sizeof(struct p2p_channel)); 2944 if (p2p->cfg->pref_chan) { 2945 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan, 2946 cfg->num_pref_chan * 2947 sizeof(struct p2p_channel)); 2948 } else 2949 p2p->cfg->num_pref_chan = 0; 2950 } 2951 2952 p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash); 2953 2954 p2p->min_disc_int = 1; 2955 p2p->max_disc_int = 3; 2956 p2p->max_disc_tu = -1; 2957 2958 if (os_get_random(&p2p->next_tie_breaker, 1) < 0) 2959 p2p->next_tie_breaker = 0; 2960 p2p->next_tie_breaker &= 0x01; 2961 if (cfg->sd_request) 2962 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 2963 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE; 2964 if (cfg->concurrent_operations) 2965 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER; 2966 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 2967 2968 dl_list_init(&p2p->devices); 2969 2970 p2p->go_timeout = 100; 2971 p2p->client_timeout = 20; 2972 p2p->num_p2p_sd_queries = 0; 2973 2974 p2p_dbg(p2p, "initialized"); 2975 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 2976 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 2977 2978 return p2p; 2979 } 2980 2981 2982 void p2p_deinit(struct p2p_data *p2p) 2983 { 2984 #ifdef CONFIG_WIFI_DISPLAY 2985 wpabuf_free(p2p->wfd_ie_beacon); 2986 wpabuf_free(p2p->wfd_ie_probe_req); 2987 wpabuf_free(p2p->wfd_ie_probe_resp); 2988 wpabuf_free(p2p->wfd_ie_assoc_req); 2989 wpabuf_free(p2p->wfd_ie_invitation); 2990 wpabuf_free(p2p->wfd_ie_prov_disc_req); 2991 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 2992 wpabuf_free(p2p->wfd_ie_go_neg); 2993 wpabuf_free(p2p->wfd_dev_info); 2994 wpabuf_free(p2p->wfd_assoc_bssid); 2995 wpabuf_free(p2p->wfd_coupled_sink_info); 2996 #endif /* CONFIG_WIFI_DISPLAY */ 2997 2998 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2999 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 3000 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL); 3001 p2p_flush(p2p); 3002 p2p_free_req_dev_types(p2p); 3003 os_free(p2p->cfg->dev_name); 3004 os_free(p2p->cfg->manufacturer); 3005 os_free(p2p->cfg->model_name); 3006 os_free(p2p->cfg->model_number); 3007 os_free(p2p->cfg->serial_number); 3008 os_free(p2p->cfg->pref_chan); 3009 os_free(p2p->groups); 3010 p2ps_prov_free(p2p); 3011 wpabuf_free(p2p->sd_resp); 3012 p2p_remove_wps_vendor_extensions(p2p); 3013 os_free(p2p->no_go_freq.range); 3014 p2p_service_flush_asp(p2p); 3015 3016 os_free(p2p); 3017 } 3018 3019 3020 void p2p_flush(struct p2p_data *p2p) 3021 { 3022 struct p2p_device *dev, *prev; 3023 3024 p2p_ext_listen(p2p, 0, 0); 3025 p2p_stop_find(p2p); 3026 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device, 3027 list) { 3028 dl_list_del(&dev->list); 3029 p2p_device_free(p2p, dev); 3030 } 3031 p2p_free_sd_queries(p2p); 3032 os_free(p2p->after_scan_tx); 3033 p2p->after_scan_tx = NULL; 3034 p2p->ssid_set = 0; 3035 p2ps_prov_free(p2p); 3036 p2p_reset_pending_pd(p2p); 3037 p2p->override_pref_op_class = 0; 3038 p2p->override_pref_channel = 0; 3039 } 3040 3041 3042 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr) 3043 { 3044 struct p2p_device *dev; 3045 3046 dev = p2p_get_device(p2p, addr); 3047 if (dev == NULL) 3048 return -1; 3049 3050 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr)); 3051 3052 if (p2p->go_neg_peer == dev) { 3053 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL); 3054 p2p->go_neg_peer = NULL; 3055 } 3056 3057 dev->wps_method = WPS_NOT_READY; 3058 dev->oob_pw_id = 0; 3059 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 3060 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 3061 3062 /* Check if after_scan_tx is for this peer. If so free it */ 3063 if (p2p->after_scan_tx && 3064 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) { 3065 os_free(p2p->after_scan_tx); 3066 p2p->after_scan_tx = NULL; 3067 } 3068 3069 return 0; 3070 } 3071 3072 3073 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name) 3074 { 3075 os_free(p2p->cfg->dev_name); 3076 if (dev_name) { 3077 p2p->cfg->dev_name = os_strdup(dev_name); 3078 if (p2p->cfg->dev_name == NULL) 3079 return -1; 3080 } else 3081 p2p->cfg->dev_name = NULL; 3082 return 0; 3083 } 3084 3085 3086 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer) 3087 { 3088 os_free(p2p->cfg->manufacturer); 3089 p2p->cfg->manufacturer = NULL; 3090 if (manufacturer) { 3091 p2p->cfg->manufacturer = os_strdup(manufacturer); 3092 if (p2p->cfg->manufacturer == NULL) 3093 return -1; 3094 } 3095 3096 return 0; 3097 } 3098 3099 3100 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name) 3101 { 3102 os_free(p2p->cfg->model_name); 3103 p2p->cfg->model_name = NULL; 3104 if (model_name) { 3105 p2p->cfg->model_name = os_strdup(model_name); 3106 if (p2p->cfg->model_name == NULL) 3107 return -1; 3108 } 3109 3110 return 0; 3111 } 3112 3113 3114 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number) 3115 { 3116 os_free(p2p->cfg->model_number); 3117 p2p->cfg->model_number = NULL; 3118 if (model_number) { 3119 p2p->cfg->model_number = os_strdup(model_number); 3120 if (p2p->cfg->model_number == NULL) 3121 return -1; 3122 } 3123 3124 return 0; 3125 } 3126 3127 3128 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number) 3129 { 3130 os_free(p2p->cfg->serial_number); 3131 p2p->cfg->serial_number = NULL; 3132 if (serial_number) { 3133 p2p->cfg->serial_number = os_strdup(serial_number); 3134 if (p2p->cfg->serial_number == NULL) 3135 return -1; 3136 } 3137 3138 return 0; 3139 } 3140 3141 3142 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods) 3143 { 3144 p2p->cfg->config_methods = config_methods; 3145 } 3146 3147 3148 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid) 3149 { 3150 os_memcpy(p2p->cfg->uuid, uuid, 16); 3151 } 3152 3153 3154 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type) 3155 { 3156 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8); 3157 return 0; 3158 } 3159 3160 3161 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8], 3162 size_t num_dev_types) 3163 { 3164 if (num_dev_types > P2P_SEC_DEVICE_TYPES) 3165 num_dev_types = P2P_SEC_DEVICE_TYPES; 3166 p2p->cfg->num_sec_dev_types = num_dev_types; 3167 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8); 3168 return 0; 3169 } 3170 3171 3172 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p) 3173 { 3174 int i; 3175 3176 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 3177 wpabuf_free(p2p->wps_vendor_ext[i]); 3178 p2p->wps_vendor_ext[i] = NULL; 3179 } 3180 } 3181 3182 3183 int p2p_add_wps_vendor_extension(struct p2p_data *p2p, 3184 const struct wpabuf *vendor_ext) 3185 { 3186 int i; 3187 3188 if (vendor_ext == NULL) 3189 return -1; 3190 3191 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 3192 if (p2p->wps_vendor_ext[i] == NULL) 3193 break; 3194 } 3195 if (i >= P2P_MAX_WPS_VENDOR_EXT) 3196 return -1; 3197 3198 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext); 3199 if (p2p->wps_vendor_ext[i] == NULL) 3200 return -1; 3201 3202 return 0; 3203 } 3204 3205 3206 int p2p_set_country(struct p2p_data *p2p, const char *country) 3207 { 3208 os_memcpy(p2p->cfg->country, country, 3); 3209 return 0; 3210 } 3211 3212 3213 static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev) 3214 { 3215 int res; 3216 3217 if (dev->sd_pending_bcast_queries == 0) { 3218 /* Initialize with total number of registered broadcast 3219 * SD queries. */ 3220 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries; 3221 } 3222 3223 res = p2p_start_sd(p2p, dev); 3224 if (res == -2) 3225 return -2; 3226 if (res == 0) 3227 return 1; 3228 3229 if (dev->req_config_methods && 3230 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) { 3231 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 3232 MACSTR " (config methods 0x%x)", 3233 MAC2STR(dev->info.p2p_device_addr), 3234 dev->req_config_methods); 3235 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0) 3236 return 1; 3237 } 3238 3239 return 0; 3240 } 3241 3242 3243 void p2p_continue_find(struct p2p_data *p2p) 3244 { 3245 struct p2p_device *dev; 3246 int found, res; 3247 3248 p2p_set_state(p2p, P2P_SEARCH); 3249 3250 /* Continue from the device following the last iteration */ 3251 found = 0; 3252 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3253 if (dev == p2p->last_p2p_find_oper) { 3254 found = 1; 3255 continue; 3256 } 3257 if (!found) 3258 continue; 3259 res = p2p_pre_find_operation(p2p, dev); 3260 if (res > 0) { 3261 p2p->last_p2p_find_oper = dev; 3262 return; 3263 } 3264 if (res == -2) 3265 goto skip_sd; 3266 } 3267 3268 /* 3269 * Wrap around to the beginning of the list and continue until the last 3270 * iteration device. 3271 */ 3272 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3273 res = p2p_pre_find_operation(p2p, dev); 3274 if (res > 0) { 3275 p2p->last_p2p_find_oper = dev; 3276 return; 3277 } 3278 if (res == -2) 3279 goto skip_sd; 3280 if (dev == p2p->last_p2p_find_oper) 3281 break; 3282 } 3283 3284 skip_sd: 3285 os_memset(p2p->sd_query_no_ack, 0, ETH_ALEN); 3286 p2p_listen_in_find(p2p, 1); 3287 } 3288 3289 3290 static void p2p_sd_cb(struct p2p_data *p2p, int success) 3291 { 3292 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d", 3293 success); 3294 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3295 3296 if (!success) { 3297 if (p2p->sd_peer) { 3298 if (is_zero_ether_addr(p2p->sd_query_no_ack)) { 3299 os_memcpy(p2p->sd_query_no_ack, 3300 p2p->sd_peer->info.p2p_device_addr, 3301 ETH_ALEN); 3302 p2p_dbg(p2p, 3303 "First SD Query no-ACK in this search iteration: " 3304 MACSTR, MAC2STR(p2p->sd_query_no_ack)); 3305 } 3306 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3307 } 3308 p2p->sd_peer = NULL; 3309 if (p2p->state != P2P_IDLE) 3310 p2p_continue_find(p2p); 3311 return; 3312 } 3313 3314 if (p2p->sd_peer == NULL) { 3315 p2p_dbg(p2p, "No SD peer entry known"); 3316 if (p2p->state != P2P_IDLE) 3317 p2p_continue_find(p2p); 3318 return; 3319 } 3320 3321 if (p2p->sd_query && p2p->sd_query->for_all_peers) { 3322 /* Update the pending broadcast SD query count for this device 3323 */ 3324 p2p->sd_peer->sd_pending_bcast_queries--; 3325 3326 /* 3327 * If there are no pending broadcast queries for this device, 3328 * mark it as done (-1). 3329 */ 3330 if (p2p->sd_peer->sd_pending_bcast_queries == 0) 3331 p2p->sd_peer->sd_pending_bcast_queries = -1; 3332 } 3333 3334 /* Wait for response from the peer */ 3335 p2p_set_state(p2p, P2P_SD_DURING_FIND); 3336 p2p_set_timeout(p2p, 0, 200000); 3337 } 3338 3339 3340 /** 3341 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state 3342 * @p2p: P2P module context from p2p_init() 3343 */ 3344 static void p2p_retry_pd(struct p2p_data *p2p) 3345 { 3346 struct p2p_device *dev; 3347 3348 /* 3349 * Retry the prov disc req attempt only for the peer that the user had 3350 * requested. 3351 */ 3352 3353 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3354 if (os_memcmp(p2p->pending_pd_devaddr, 3355 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3356 continue; 3357 if (!dev->req_config_methods) 3358 continue; 3359 3360 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 3361 MACSTR " (config methods 0x%x)", 3362 MAC2STR(dev->info.p2p_device_addr), 3363 dev->req_config_methods); 3364 p2p_send_prov_disc_req(p2p, dev, 3365 dev->flags & P2P_DEV_PD_FOR_JOIN, 3366 p2p->pd_force_freq); 3367 return; 3368 } 3369 } 3370 3371 3372 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success) 3373 { 3374 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d", 3375 success); 3376 3377 /* 3378 * Postpone resetting the pending action state till after we actually 3379 * time out. This allows us to take some action like notifying any 3380 * interested parties about no response to the request. 3381 * 3382 * When the timer (below) goes off we check in IDLE, SEARCH, or 3383 * LISTEN_ONLY state, which are the only allowed states to issue a PD 3384 * requests in, if this was still pending and then raise notification. 3385 */ 3386 3387 if (!success) { 3388 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3389 3390 if (p2p->user_initiated_pd && 3391 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY)) 3392 { 3393 /* Retry request from timeout to avoid busy loops */ 3394 p2p->pending_action_state = P2P_PENDING_PD; 3395 p2p_set_timeout(p2p, 0, 50000); 3396 } else if (p2p->state != P2P_IDLE) 3397 p2p_continue_find(p2p); 3398 else if (p2p->user_initiated_pd) { 3399 p2p->pending_action_state = P2P_PENDING_PD; 3400 p2p_set_timeout(p2p, 0, 300000); 3401 } 3402 return; 3403 } 3404 3405 /* 3406 * If after PD Request the peer doesn't expect to receive PD Response 3407 * the PD Request ACK indicates a completion of the current PD. This 3408 * happens only on the advertiser side sending the follow-on PD Request 3409 * with the status different than 12 (Success: accepted by user). 3410 */ 3411 if (p2p->p2ps_prov && !p2p->p2ps_prov->pd_seeker && 3412 p2p->p2ps_prov->status != P2P_SC_SUCCESS_DEFERRED) { 3413 p2p_dbg(p2p, "P2PS PD completion on Follow-on PD Request ACK"); 3414 3415 if (p2p->send_action_in_progress) { 3416 p2p->send_action_in_progress = 0; 3417 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3418 } 3419 3420 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3421 3422 if (p2p->cfg->p2ps_prov_complete) { 3423 p2p->cfg->p2ps_prov_complete( 3424 p2p->cfg->cb_ctx, 3425 p2p->p2ps_prov->status, 3426 p2p->p2ps_prov->adv_mac, 3427 p2p->p2ps_prov->adv_mac, 3428 p2p->p2ps_prov->session_mac, 3429 NULL, p2p->p2ps_prov->adv_id, 3430 p2p->p2ps_prov->session_id, 3431 0, 0, NULL, 0, 0, 0, 3432 NULL, NULL, 0, 0, NULL, 0); 3433 } 3434 3435 if (p2p->user_initiated_pd) 3436 p2p_reset_pending_pd(p2p); 3437 3438 p2ps_prov_free(p2p); 3439 return; 3440 } 3441 3442 /* 3443 * This postponing, of resetting pending_action_state, needs to be 3444 * done only for user initiated PD requests and not internal ones. 3445 */ 3446 if (p2p->user_initiated_pd) 3447 p2p->pending_action_state = P2P_PENDING_PD; 3448 else 3449 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3450 3451 /* Wait for response from the peer */ 3452 if (p2p->state == P2P_SEARCH) 3453 p2p_set_state(p2p, P2P_PD_DURING_FIND); 3454 p2p_set_timeout(p2p, 0, 200000); 3455 } 3456 3457 3458 static int p2p_check_after_scan_tx_continuation(struct p2p_data *p2p) 3459 { 3460 if (p2p->after_scan_tx_in_progress) { 3461 p2p->after_scan_tx_in_progress = 0; 3462 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING && 3463 p2p_run_after_scan(p2p)) 3464 return 1; 3465 if (p2p->state == P2P_SEARCH) { 3466 p2p_dbg(p2p, "Continue find after after_scan_tx completion"); 3467 p2p_continue_find(p2p); 3468 } 3469 } 3470 3471 return 0; 3472 } 3473 3474 3475 static void p2p_prov_disc_resp_cb(struct p2p_data *p2p, int success) 3476 { 3477 p2p_dbg(p2p, "Provision Discovery Response TX callback: success=%d", 3478 success); 3479 3480 if (p2p->send_action_in_progress) { 3481 p2p->send_action_in_progress = 0; 3482 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3483 } 3484 3485 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3486 3487 if (!success) 3488 goto continue_search; 3489 3490 if (!p2p->cfg->prov_disc_resp_cb || 3491 p2p->cfg->prov_disc_resp_cb(p2p->cfg->cb_ctx) < 1) 3492 goto continue_search; 3493 3494 p2p_dbg(p2p, 3495 "Post-Provision Discovery operations started - do not try to continue other P2P operations"); 3496 return; 3497 3498 continue_search: 3499 p2p_check_after_scan_tx_continuation(p2p); 3500 } 3501 3502 3503 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq, 3504 struct os_reltime *rx_time, int level, const u8 *ies, 3505 size_t ies_len) 3506 { 3507 if (os_reltime_before(rx_time, &p2p->find_start)) { 3508 /* 3509 * The driver may have cached (e.g., in cfg80211 BSS table) the 3510 * scan results for relatively long time. To avoid reporting 3511 * stale information, update P2P peers only based on results 3512 * that have based on frames received after the last p2p_find 3513 * operation was started. 3514 */ 3515 p2p_dbg(p2p, "Ignore old scan result for " MACSTR 3516 " (rx_time=%u.%06u find_start=%u.%06u)", 3517 MAC2STR(bssid), (unsigned int) rx_time->sec, 3518 (unsigned int) rx_time->usec, 3519 (unsigned int) p2p->find_start.sec, 3520 (unsigned int) p2p->find_start.usec); 3521 return 0; 3522 } 3523 3524 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1); 3525 3526 return 0; 3527 } 3528 3529 3530 void p2p_scan_res_handled(struct p2p_data *p2p) 3531 { 3532 if (!p2p->p2p_scan_running) { 3533 p2p_dbg(p2p, "p2p_scan was not running, but scan results received"); 3534 } 3535 p2p->p2p_scan_running = 0; 3536 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 3537 3538 if (p2p_run_after_scan(p2p)) 3539 return; 3540 if (p2p->state == P2P_SEARCH) 3541 p2p_continue_find(p2p); 3542 } 3543 3544 3545 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id, 3546 unsigned int bands) 3547 { 3548 u8 dev_capab; 3549 u8 *len; 3550 3551 #ifdef CONFIG_WIFI_DISPLAY 3552 if (p2p->wfd_ie_probe_req) 3553 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req); 3554 #endif /* CONFIG_WIFI_DISPLAY */ 3555 3556 if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]) 3557 wpabuf_put_buf(ies, 3558 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]); 3559 3560 len = p2p_buf_add_ie_hdr(ies); 3561 3562 dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3563 3564 /* P2PS requires Probe Request frames to include SD bit */ 3565 if (p2p->p2ps_seek && p2p->p2ps_seek_count) 3566 dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 3567 3568 p2p_buf_add_capability(ies, dev_capab, 0); 3569 3570 if (dev_id) 3571 p2p_buf_add_device_id(ies, dev_id); 3572 if (p2p->cfg->reg_class && p2p->cfg->channel) 3573 p2p_buf_add_listen_channel(ies, p2p->cfg->country, 3574 p2p->cfg->reg_class, 3575 p2p->cfg->channel); 3576 if (p2p->ext_listen_interval) 3577 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period, 3578 p2p->ext_listen_interval); 3579 3580 if (bands & BAND_60_GHZ) 3581 p2p_buf_add_device_info(ies, p2p, NULL); 3582 3583 if (p2p->p2ps_seek && p2p->p2ps_seek_count) 3584 p2p_buf_add_service_hash(ies, p2p); 3585 3586 /* TODO: p2p_buf_add_operating_channel() if GO */ 3587 p2p_buf_update_ie_hdr(ies, len); 3588 } 3589 3590 3591 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p) 3592 { 3593 size_t len = 100; 3594 3595 #ifdef CONFIG_WIFI_DISPLAY 3596 if (p2p && p2p->wfd_ie_probe_req) 3597 len += wpabuf_len(p2p->wfd_ie_probe_req); 3598 #endif /* CONFIG_WIFI_DISPLAY */ 3599 3600 if (p2p && p2p->vendor_elem && 3601 p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]) 3602 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]); 3603 3604 return len; 3605 } 3606 3607 3608 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end) 3609 { 3610 return p2p_attr_text(p2p_ie, buf, end); 3611 } 3612 3613 3614 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success) 3615 { 3616 struct p2p_device *dev = p2p->go_neg_peer; 3617 int timeout; 3618 3619 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success); 3620 3621 if (dev == NULL) { 3622 p2p_dbg(p2p, "No pending GO Negotiation"); 3623 return; 3624 } 3625 3626 if (success) { 3627 if (dev->flags & P2P_DEV_USER_REJECTED) { 3628 p2p_set_state(p2p, P2P_IDLE); 3629 return; 3630 } 3631 } else if (dev->go_neg_req_sent) { 3632 /* Cancel the increment from p2p_connect_send() on failure */ 3633 dev->go_neg_req_sent--; 3634 } 3635 3636 if (!success && 3637 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) && 3638 !is_zero_ether_addr(dev->member_in_go_dev)) { 3639 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO", 3640 MAC2STR(dev->info.p2p_device_addr)); 3641 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3642 p2p_send_dev_disc_req(p2p, dev); 3643 return; 3644 } 3645 3646 /* 3647 * Use P2P find, if needed, to find the other device from its listen 3648 * channel. 3649 */ 3650 p2p_set_state(p2p, P2P_CONNECT); 3651 timeout = success ? 500000 : 100000; 3652 if (!success && p2p->go_neg_peer && 3653 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) { 3654 unsigned int r; 3655 /* 3656 * Peer is expected to wait our response and we will skip the 3657 * listen phase. Add some randomness to the wait time here to 3658 * make it less likely to hit cases where we could end up in 3659 * sync with peer not listening. 3660 */ 3661 if (os_get_random((u8 *) &r, sizeof(r)) < 0) 3662 r = 0; 3663 timeout += r % 100000; 3664 } 3665 p2p_set_timeout(p2p, 0, timeout); 3666 } 3667 3668 3669 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success) 3670 { 3671 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d", 3672 success); 3673 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) { 3674 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore"); 3675 return; 3676 } 3677 p2p_set_state(p2p, P2P_CONNECT); 3678 p2p_set_timeout(p2p, 0, 500000); 3679 } 3680 3681 3682 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success, 3683 const u8 *addr) 3684 { 3685 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success); 3686 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) { 3687 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status); 3688 return; 3689 } 3690 3691 if (success) { 3692 struct p2p_device *dev; 3693 dev = p2p_get_device(p2p, addr); 3694 if (dev && 3695 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) 3696 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE; 3697 } 3698 3699 if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND) 3700 p2p_continue_find(p2p); 3701 } 3702 3703 3704 static void p2p_go_neg_conf_cb(struct p2p_data *p2p, 3705 enum p2p_send_action_result result) 3706 { 3707 struct p2p_device *dev; 3708 3709 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result); 3710 if (result == P2P_SEND_ACTION_FAILED) { 3711 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3712 p2p_go_neg_failed(p2p, -1); 3713 return; 3714 } 3715 3716 dev = p2p->go_neg_peer; 3717 3718 if (result == P2P_SEND_ACTION_NO_ACK) { 3719 /* 3720 * Retry GO Negotiation Confirmation 3721 * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive 3722 * ACK for confirmation. 3723 */ 3724 if (dev && dev->go_neg_conf && 3725 dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) { 3726 p2p_dbg(p2p, "GO Negotiation Confirm retry %d", 3727 dev->go_neg_conf_sent); 3728 p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM; 3729 if (p2p_send_action(p2p, dev->go_neg_conf_freq, 3730 dev->info.p2p_device_addr, 3731 p2p->cfg->dev_addr, 3732 dev->info.p2p_device_addr, 3733 wpabuf_head(dev->go_neg_conf), 3734 wpabuf_len(dev->go_neg_conf), 0) >= 3735 0) { 3736 dev->go_neg_conf_sent++; 3737 return; 3738 } 3739 p2p_dbg(p2p, "Failed to re-send Action frame"); 3740 3741 /* 3742 * Continue with the assumption that the first attempt 3743 * went through and just the ACK frame was lost. 3744 */ 3745 } 3746 3747 /* 3748 * It looks like the TX status for GO Negotiation Confirm is 3749 * often showing failure even when the peer has actually 3750 * received the frame. Since the peer may change channels 3751 * immediately after having received the frame, we may not see 3752 * an Ack for retries, so just dropping a single frame may 3753 * trigger this. To allow the group formation to succeed if the 3754 * peer did indeed receive the frame, continue regardless of 3755 * the TX status. 3756 */ 3757 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported"); 3758 } 3759 3760 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3761 3762 if (dev == NULL) 3763 return; 3764 3765 p2p_go_complete(p2p, dev); 3766 } 3767 3768 3769 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 3770 const u8 *src, const u8 *bssid, 3771 enum p2p_send_action_result result) 3772 { 3773 enum p2p_pending_action_state state; 3774 int success; 3775 3776 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR 3777 " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)", 3778 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), 3779 MAC2STR(bssid), result, p2p_state_txt(p2p->state)); 3780 success = result == P2P_SEND_ACTION_SUCCESS; 3781 state = p2p->pending_action_state; 3782 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3783 switch (state) { 3784 case P2P_NO_PENDING_ACTION: 3785 if (p2p->send_action_in_progress) { 3786 p2p->send_action_in_progress = 0; 3787 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3788 } 3789 p2p_check_after_scan_tx_continuation(p2p); 3790 break; 3791 case P2P_PENDING_GO_NEG_REQUEST: 3792 p2p_go_neg_req_cb(p2p, success); 3793 break; 3794 case P2P_PENDING_GO_NEG_RESPONSE: 3795 p2p_go_neg_resp_cb(p2p, success); 3796 break; 3797 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE: 3798 p2p_go_neg_resp_failure_cb(p2p, success, dst); 3799 break; 3800 case P2P_PENDING_GO_NEG_CONFIRM: 3801 p2p_go_neg_conf_cb(p2p, result); 3802 break; 3803 case P2P_PENDING_SD: 3804 p2p_sd_cb(p2p, success); 3805 break; 3806 case P2P_PENDING_PD: 3807 p2p_prov_disc_cb(p2p, success); 3808 break; 3809 case P2P_PENDING_PD_RESPONSE: 3810 p2p_prov_disc_resp_cb(p2p, success); 3811 break; 3812 case P2P_PENDING_INVITATION_REQUEST: 3813 p2p_invitation_req_cb(p2p, success); 3814 break; 3815 case P2P_PENDING_INVITATION_RESPONSE: 3816 p2p_invitation_resp_cb(p2p, success); 3817 if (p2p->inv_status != P2P_SC_SUCCESS) 3818 p2p_check_after_scan_tx_continuation(p2p); 3819 break; 3820 case P2P_PENDING_DEV_DISC_REQUEST: 3821 p2p_dev_disc_req_cb(p2p, success); 3822 break; 3823 case P2P_PENDING_DEV_DISC_RESPONSE: 3824 p2p_dev_disc_resp_cb(p2p, success); 3825 break; 3826 case P2P_PENDING_GO_DISC_REQ: 3827 p2p_go_disc_req_cb(p2p, success); 3828 break; 3829 } 3830 3831 p2p->after_scan_tx_in_progress = 0; 3832 } 3833 3834 3835 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq, 3836 unsigned int duration) 3837 { 3838 if (freq == p2p->pending_client_disc_freq) { 3839 p2p_dbg(p2p, "Client discoverability remain-awake completed"); 3840 p2p->pending_client_disc_freq = 0; 3841 return; 3842 } 3843 3844 if (freq != p2p->pending_listen_freq) { 3845 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)", 3846 freq, duration, p2p->pending_listen_freq); 3847 return; 3848 } 3849 3850 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback", 3851 p2p->pending_listen_sec, p2p->pending_listen_usec, 3852 p2p->pending_listen_freq); 3853 p2p->in_listen = 1; 3854 p2p->drv_in_listen = freq; 3855 if (p2p->pending_listen_sec || p2p->pending_listen_usec) { 3856 /* 3857 * Add 20 msec extra wait to avoid race condition with driver 3858 * remain-on-channel end event, i.e., give driver more time to 3859 * complete the operation before our timeout expires. 3860 */ 3861 p2p_set_timeout(p2p, p2p->pending_listen_sec, 3862 p2p->pending_listen_usec + 20000); 3863 } 3864 3865 p2p->pending_listen_freq = 0; 3866 } 3867 3868 3869 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq) 3870 { 3871 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq); 3872 p2p->drv_in_listen = 0; 3873 if (p2p->in_listen) 3874 return 0; /* Internal timeout will trigger the next step */ 3875 3876 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) { 3877 if (p2p->go_neg_peer->connect_reqs >= 120) { 3878 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3879 p2p_go_neg_failed(p2p, -1); 3880 return 0; 3881 } 3882 3883 p2p_set_state(p2p, P2P_CONNECT); 3884 p2p_connect_send(p2p, p2p->go_neg_peer); 3885 return 1; 3886 } else if (p2p->state == P2P_SEARCH) { 3887 if (p2p->p2p_scan_running) { 3888 /* 3889 * Search is already in progress. This can happen if 3890 * an Action frame RX is reported immediately after 3891 * the end of a remain-on-channel operation and the 3892 * response frame to that is sent using an offchannel 3893 * operation while in p2p_find. Avoid an attempt to 3894 * restart a scan here. 3895 */ 3896 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one"); 3897 return 1; 3898 } 3899 if (p2p->pending_listen_freq) { 3900 /* 3901 * Better wait a bit if the driver is unable to start 3902 * offchannel operation for some reason. p2p_search() 3903 * will be started from internal timeout. 3904 */ 3905 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop"); 3906 p2p_set_timeout(p2p, 0, 100000); 3907 return 1; 3908 } 3909 if (p2p->search_delay) { 3910 p2p_dbg(p2p, "Delay search operation by %u ms", 3911 p2p->search_delay); 3912 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3913 (p2p->search_delay % 1000) * 1000); 3914 return 1; 3915 } 3916 p2p_search(p2p); 3917 return 1; 3918 } 3919 3920 return 0; 3921 } 3922 3923 3924 static void p2p_timeout_connect(struct p2p_data *p2p) 3925 { 3926 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3927 if (p2p->go_neg_peer && 3928 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 3929 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed"); 3930 p2p_go_neg_failed(p2p, -1); 3931 return; 3932 } 3933 if (p2p->go_neg_peer && 3934 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) && 3935 p2p->go_neg_peer->connect_reqs < 120) { 3936 p2p_dbg(p2p, "Peer expected to wait our response - skip listen"); 3937 p2p_connect_send(p2p, p2p->go_neg_peer); 3938 return; 3939 } 3940 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) { 3941 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)"); 3942 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3943 p2p_set_timeout(p2p, 0, 30000); 3944 return; 3945 } 3946 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3947 p2p_listen_in_find(p2p, 0); 3948 } 3949 3950 3951 static void p2p_timeout_connect_listen(struct p2p_data *p2p) 3952 { 3953 if (p2p->go_neg_peer) { 3954 if (p2p->drv_in_listen) { 3955 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete"); 3956 return; 3957 } 3958 3959 if (p2p->go_neg_peer->connect_reqs >= 120) { 3960 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3961 p2p_go_neg_failed(p2p, -1); 3962 return; 3963 } 3964 3965 p2p_set_state(p2p, P2P_CONNECT); 3966 p2p_connect_send(p2p, p2p->go_neg_peer); 3967 } else 3968 p2p_set_state(p2p, P2P_IDLE); 3969 } 3970 3971 3972 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p) 3973 { 3974 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 3975 3976 if (p2p->cfg->is_concurrent_session_active && 3977 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx)) 3978 p2p_set_timeout(p2p, 0, 500000); 3979 else 3980 p2p_set_timeout(p2p, 0, 200000); 3981 } 3982 3983 3984 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p) 3985 { 3986 struct p2p_device *dev = p2p->go_neg_peer; 3987 3988 if (dev == NULL) { 3989 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait"); 3990 return; 3991 } 3992 3993 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation"); 3994 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT); 3995 p2p_listen_in_find(p2p, 0); 3996 } 3997 3998 3999 static void p2p_timeout_sd_during_find(struct p2p_data *p2p) 4000 { 4001 p2p_dbg(p2p, "Service Discovery Query timeout"); 4002 if (p2p->sd_peer) { 4003 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 4004 p2p->sd_peer = NULL; 4005 } 4006 p2p_continue_find(p2p); 4007 } 4008 4009 4010 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p) 4011 { 4012 p2p_dbg(p2p, "Provision Discovery Request timeout"); 4013 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 4014 p2p_continue_find(p2p); 4015 } 4016 4017 4018 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p) 4019 { 4020 u32 adv_id = 0; 4021 u8 *adv_mac = NULL; 4022 4023 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 4024 4025 /* 4026 * For user initiated PD requests that we have not gotten any responses 4027 * for while in IDLE state, we retry them a couple of times before 4028 * giving up. 4029 */ 4030 if (!p2p->user_initiated_pd) 4031 return; 4032 4033 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout"); 4034 4035 if (p2p->pd_retries) { 4036 p2p->pd_retries--; 4037 p2p_retry_pd(p2p); 4038 } else { 4039 struct p2p_device *dev; 4040 int for_join = 0; 4041 4042 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 4043 if (os_memcmp(p2p->pending_pd_devaddr, 4044 dev->info.p2p_device_addr, ETH_ALEN) != 0) 4045 continue; 4046 if (dev->req_config_methods && 4047 (dev->flags & P2P_DEV_PD_FOR_JOIN)) 4048 for_join = 1; 4049 } 4050 4051 if (p2p->p2ps_prov) { 4052 adv_id = p2p->p2ps_prov->adv_id; 4053 adv_mac = p2p->p2ps_prov->adv_mac; 4054 } 4055 4056 if (p2p->cfg->prov_disc_fail) 4057 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, 4058 p2p->pending_pd_devaddr, 4059 for_join ? 4060 P2P_PROV_DISC_TIMEOUT_JOIN : 4061 P2P_PROV_DISC_TIMEOUT, 4062 adv_id, adv_mac, NULL); 4063 p2p_reset_pending_pd(p2p); 4064 } 4065 } 4066 4067 4068 static void p2p_timeout_invite(struct p2p_data *p2p) 4069 { 4070 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 4071 p2p_set_state(p2p, P2P_INVITE_LISTEN); 4072 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 4073 /* 4074 * Better remain on operating channel instead of listen channel 4075 * when running a group. 4076 */ 4077 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel"); 4078 p2p_set_timeout(p2p, 0, 100000); 4079 return; 4080 } 4081 p2p_listen_in_find(p2p, 0); 4082 } 4083 4084 4085 static void p2p_timeout_invite_listen(struct p2p_data *p2p) 4086 { 4087 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) { 4088 p2p_set_state(p2p, P2P_INVITE); 4089 p2p_invite_send(p2p, p2p->invite_peer, 4090 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id); 4091 } else { 4092 if (p2p->invite_peer) { 4093 p2p_dbg(p2p, "Invitation Request retry limit reached"); 4094 if (p2p->cfg->invitation_result) 4095 p2p->cfg->invitation_result( 4096 p2p->cfg->cb_ctx, -1, NULL, NULL, 4097 p2p->invite_peer->info.p2p_device_addr, 4098 0, 0); 4099 } 4100 p2p_set_state(p2p, P2P_IDLE); 4101 } 4102 } 4103 4104 4105 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx) 4106 { 4107 struct p2p_data *p2p = eloop_ctx; 4108 4109 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state)); 4110 4111 p2p->in_listen = 0; 4112 if (p2p->drv_in_listen) { 4113 p2p_dbg(p2p, "Driver is still in listen state - stop it"); 4114 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 4115 } 4116 4117 switch (p2p->state) { 4118 case P2P_IDLE: 4119 /* Check if we timed out waiting for PD req */ 4120 if (p2p->pending_action_state == P2P_PENDING_PD) 4121 p2p_timeout_prov_disc_req(p2p); 4122 break; 4123 case P2P_SEARCH: 4124 /* Check if we timed out waiting for PD req */ 4125 if (p2p->pending_action_state == P2P_PENDING_PD) 4126 p2p_timeout_prov_disc_req(p2p); 4127 if (p2p->search_delay && !p2p->in_search_delay) { 4128 p2p_dbg(p2p, "Delay search operation by %u ms", 4129 p2p->search_delay); 4130 p2p->in_search_delay = 1; 4131 p2p_set_timeout(p2p, p2p->search_delay / 1000, 4132 (p2p->search_delay % 1000) * 1000); 4133 break; 4134 } 4135 p2p->in_search_delay = 0; 4136 p2p_search(p2p); 4137 break; 4138 case P2P_CONNECT: 4139 p2p_timeout_connect(p2p); 4140 break; 4141 case P2P_CONNECT_LISTEN: 4142 p2p_timeout_connect_listen(p2p); 4143 break; 4144 case P2P_GO_NEG: 4145 break; 4146 case P2P_LISTEN_ONLY: 4147 /* Check if we timed out waiting for PD req */ 4148 if (p2p->pending_action_state == P2P_PENDING_PD) 4149 p2p_timeout_prov_disc_req(p2p); 4150 4151 if (p2p->ext_listen_only) { 4152 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed"); 4153 p2p->ext_listen_only = 0; 4154 p2p_set_state(p2p, P2P_IDLE); 4155 } 4156 break; 4157 case P2P_WAIT_PEER_CONNECT: 4158 p2p_timeout_wait_peer_connect(p2p); 4159 break; 4160 case P2P_WAIT_PEER_IDLE: 4161 p2p_timeout_wait_peer_idle(p2p); 4162 break; 4163 case P2P_SD_DURING_FIND: 4164 p2p_timeout_sd_during_find(p2p); 4165 break; 4166 case P2P_PROVISIONING: 4167 break; 4168 case P2P_PD_DURING_FIND: 4169 p2p_timeout_prov_disc_during_find(p2p); 4170 break; 4171 case P2P_INVITE: 4172 p2p_timeout_invite(p2p); 4173 break; 4174 case P2P_INVITE_LISTEN: 4175 p2p_timeout_invite_listen(p2p); 4176 break; 4177 } 4178 } 4179 4180 4181 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr) 4182 { 4183 struct p2p_device *dev; 4184 4185 dev = p2p_get_device(p2p, peer_addr); 4186 p2p_dbg(p2p, "Local request to reject connection attempts by peer " 4187 MACSTR, MAC2STR(peer_addr)); 4188 if (dev == NULL) { 4189 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr)); 4190 return -1; 4191 } 4192 dev->status = P2P_SC_FAIL_REJECTED_BY_USER; 4193 dev->flags |= P2P_DEV_USER_REJECTED; 4194 return 0; 4195 } 4196 4197 4198 const char * p2p_wps_method_text(enum p2p_wps_method method) 4199 { 4200 switch (method) { 4201 case WPS_NOT_READY: 4202 return "not-ready"; 4203 case WPS_PIN_DISPLAY: 4204 return "Display"; 4205 case WPS_PIN_KEYPAD: 4206 return "Keypad"; 4207 case WPS_PBC: 4208 return "PBC"; 4209 case WPS_NFC: 4210 return "NFC"; 4211 case WPS_P2PS: 4212 return "P2PS"; 4213 } 4214 4215 return "??"; 4216 } 4217 4218 4219 static const char * p2p_go_state_text(enum p2p_go_state go_state) 4220 { 4221 switch (go_state) { 4222 case UNKNOWN_GO: 4223 return "unknown"; 4224 case LOCAL_GO: 4225 return "local"; 4226 case REMOTE_GO: 4227 return "remote"; 4228 } 4229 4230 return "??"; 4231 } 4232 4233 4234 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p, 4235 const u8 *addr, int next) 4236 { 4237 struct p2p_device *dev; 4238 4239 if (addr) 4240 dev = p2p_get_device(p2p, addr); 4241 else 4242 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4243 4244 if (dev && next) { 4245 dev = dl_list_first(&dev->list, struct p2p_device, list); 4246 if (&dev->list == &p2p->devices) 4247 dev = NULL; 4248 } 4249 4250 if (dev == NULL) 4251 return NULL; 4252 4253 return &dev->info; 4254 } 4255 4256 4257 int p2p_get_peer_info_txt(const struct p2p_peer_info *info, 4258 char *buf, size_t buflen) 4259 { 4260 struct p2p_device *dev; 4261 int res; 4262 char *pos, *end; 4263 struct os_reltime now; 4264 4265 if (info == NULL) 4266 return -1; 4267 4268 dev = (struct p2p_device *) (((u8 *) info) - 4269 offsetof(struct p2p_device, info)); 4270 4271 pos = buf; 4272 end = buf + buflen; 4273 4274 os_get_reltime(&now); 4275 res = os_snprintf(pos, end - pos, 4276 "age=%d\n" 4277 "listen_freq=%d\n" 4278 "wps_method=%s\n" 4279 "interface_addr=" MACSTR "\n" 4280 "member_in_go_dev=" MACSTR "\n" 4281 "member_in_go_iface=" MACSTR "\n" 4282 "go_neg_req_sent=%d\n" 4283 "go_state=%s\n" 4284 "dialog_token=%u\n" 4285 "intended_addr=" MACSTR "\n" 4286 "country=%c%c\n" 4287 "oper_freq=%d\n" 4288 "req_config_methods=0x%x\n" 4289 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n" 4290 "status=%d\n" 4291 "invitation_reqs=%u\n", 4292 (int) (now.sec - dev->last_seen.sec), 4293 dev->listen_freq, 4294 p2p_wps_method_text(dev->wps_method), 4295 MAC2STR(dev->interface_addr), 4296 MAC2STR(dev->member_in_go_dev), 4297 MAC2STR(dev->member_in_go_iface), 4298 dev->go_neg_req_sent, 4299 p2p_go_state_text(dev->go_state), 4300 dev->dialog_token, 4301 MAC2STR(dev->intended_addr), 4302 dev->country[0] ? dev->country[0] : '_', 4303 dev->country[1] ? dev->country[1] : '_', 4304 dev->oper_freq, 4305 dev->req_config_methods, 4306 dev->flags & P2P_DEV_PROBE_REQ_ONLY ? 4307 "[PROBE_REQ_ONLY]" : "", 4308 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "", 4309 dev->flags & P2P_DEV_NOT_YET_READY ? 4310 "[NOT_YET_READY]" : "", 4311 dev->flags & P2P_DEV_PD_PEER_DISPLAY ? 4312 "[PD_PEER_DISPLAY]" : "", 4313 dev->flags & P2P_DEV_PD_PEER_KEYPAD ? 4314 "[PD_PEER_KEYPAD]" : "", 4315 dev->flags & P2P_DEV_PD_PEER_P2PS ? 4316 "[PD_PEER_P2PS]" : "", 4317 dev->flags & P2P_DEV_USER_REJECTED ? 4318 "[USER_REJECTED]" : "", 4319 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ? 4320 "[PEER_WAITING_RESPONSE]" : "", 4321 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ? 4322 "[PREFER_PERSISTENT_GROUP]" : "", 4323 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ? 4324 "[WAIT_GO_NEG_RESPONSE]" : "", 4325 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ? 4326 "[WAIT_GO_NEG_CONFIRM]" : "", 4327 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ? 4328 "[GROUP_CLIENT_ONLY]" : "", 4329 dev->flags & P2P_DEV_FORCE_FREQ ? 4330 "[FORCE_FREQ]" : "", 4331 dev->flags & P2P_DEV_PD_FOR_JOIN ? 4332 "[PD_FOR_JOIN]" : "", 4333 dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT ? 4334 "[LAST_SEEN_AS_GROUP_CLIENT]" : "", 4335 dev->status, 4336 dev->invitation_reqs); 4337 if (os_snprintf_error(end - pos, res)) 4338 return pos - buf; 4339 pos += res; 4340 4341 if (dev->ext_listen_period) { 4342 res = os_snprintf(pos, end - pos, 4343 "ext_listen_period=%u\n" 4344 "ext_listen_interval=%u\n", 4345 dev->ext_listen_period, 4346 dev->ext_listen_interval); 4347 if (os_snprintf_error(end - pos, res)) 4348 return pos - buf; 4349 pos += res; 4350 } 4351 4352 if (dev->oper_ssid_len) { 4353 res = os_snprintf(pos, end - pos, 4354 "oper_ssid=%s\n", 4355 wpa_ssid_txt(dev->oper_ssid, 4356 dev->oper_ssid_len)); 4357 if (os_snprintf_error(end - pos, res)) 4358 return pos - buf; 4359 pos += res; 4360 } 4361 4362 #ifdef CONFIG_WIFI_DISPLAY 4363 if (dev->info.wfd_subelems) { 4364 res = os_snprintf(pos, end - pos, "wfd_subelems="); 4365 if (os_snprintf_error(end - pos, res)) 4366 return pos - buf; 4367 pos += res; 4368 4369 pos += wpa_snprintf_hex(pos, end - pos, 4370 wpabuf_head(dev->info.wfd_subelems), 4371 wpabuf_len(dev->info.wfd_subelems)); 4372 4373 res = os_snprintf(pos, end - pos, "\n"); 4374 if (os_snprintf_error(end - pos, res)) 4375 return pos - buf; 4376 pos += res; 4377 } 4378 #endif /* CONFIG_WIFI_DISPLAY */ 4379 4380 return pos - buf; 4381 } 4382 4383 4384 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr) 4385 { 4386 return p2p_get_device(p2p, addr) != NULL; 4387 } 4388 4389 4390 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled) 4391 { 4392 if (enabled) { 4393 p2p_dbg(p2p, "Client discoverability enabled"); 4394 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 4395 } else { 4396 p2p_dbg(p2p, "Client discoverability disabled"); 4397 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 4398 } 4399 } 4400 4401 4402 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1, 4403 u32 duration2, u32 interval2) 4404 { 4405 struct wpabuf *req; 4406 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL; 4407 u8 *len; 4408 4409 req = wpabuf_alloc(100); 4410 if (req == NULL) 4411 return NULL; 4412 4413 if (duration1 || interval1) { 4414 os_memset(&desc1, 0, sizeof(desc1)); 4415 desc1.count_type = 1; 4416 desc1.duration = duration1; 4417 desc1.interval = interval1; 4418 ptr1 = &desc1; 4419 4420 if (duration2 || interval2) { 4421 os_memset(&desc2, 0, sizeof(desc2)); 4422 desc2.count_type = 2; 4423 desc2.duration = duration2; 4424 desc2.interval = interval2; 4425 ptr2 = &desc2; 4426 } 4427 } 4428 4429 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1); 4430 len = p2p_buf_add_ie_hdr(req); 4431 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2); 4432 p2p_buf_update_ie_hdr(req, len); 4433 4434 return req; 4435 } 4436 4437 4438 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr, 4439 const u8 *own_interface_addr, unsigned int freq, 4440 u32 duration1, u32 interval1, u32 duration2, 4441 u32 interval2) 4442 { 4443 struct wpabuf *req; 4444 4445 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR 4446 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u " 4447 "dur2=%u int2=%u", 4448 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr), 4449 freq, duration1, interval1, duration2, interval2); 4450 4451 req = p2p_build_presence_req(duration1, interval1, duration2, 4452 interval2); 4453 if (req == NULL) 4454 return -1; 4455 4456 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 4457 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr, 4458 go_interface_addr, 4459 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 4460 p2p_dbg(p2p, "Failed to send Action frame"); 4461 } 4462 wpabuf_free(req); 4463 4464 return 0; 4465 } 4466 4467 4468 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa, 4469 size_t noa_len, u8 dialog_token) 4470 { 4471 struct wpabuf *resp; 4472 u8 *len; 4473 4474 resp = wpabuf_alloc(100 + noa_len); 4475 if (resp == NULL) 4476 return NULL; 4477 4478 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token); 4479 len = p2p_buf_add_ie_hdr(resp); 4480 p2p_buf_add_status(resp, status); 4481 if (noa) { 4482 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE); 4483 wpabuf_put_le16(resp, noa_len); 4484 wpabuf_put_data(resp, noa, noa_len); 4485 } else 4486 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL); 4487 p2p_buf_update_ie_hdr(resp, len); 4488 4489 return resp; 4490 } 4491 4492 4493 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 4494 const u8 *sa, const u8 *data, size_t len, 4495 int rx_freq) 4496 { 4497 struct p2p_message msg; 4498 u8 status; 4499 struct wpabuf *resp; 4500 size_t g; 4501 struct p2p_group *group = NULL; 4502 int parsed = 0; 4503 u8 noa[50]; 4504 int noa_len; 4505 4506 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request"); 4507 4508 for (g = 0; g < p2p->num_groups; g++) { 4509 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]), 4510 ETH_ALEN) == 0) { 4511 group = p2p->groups[g]; 4512 break; 4513 } 4514 } 4515 if (group == NULL) { 4516 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group " 4517 MACSTR, MAC2STR(da)); 4518 return; 4519 } 4520 4521 if (p2p_parse(data, len, &msg) < 0) { 4522 p2p_dbg(p2p, "Failed to parse P2P Presence Request"); 4523 status = P2P_SC_FAIL_INVALID_PARAMS; 4524 goto fail; 4525 } 4526 parsed = 1; 4527 4528 if (msg.noa == NULL) { 4529 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request"); 4530 status = P2P_SC_FAIL_INVALID_PARAMS; 4531 goto fail; 4532 } 4533 4534 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len); 4535 4536 fail: 4537 if (p2p->cfg->get_noa) 4538 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa, 4539 sizeof(noa)); 4540 else 4541 noa_len = -1; 4542 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL, 4543 noa_len > 0 ? noa_len : 0, 4544 msg.dialog_token); 4545 if (parsed) 4546 p2p_parse_free(&msg); 4547 if (resp == NULL) 4548 return; 4549 4550 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 4551 if (p2p_send_action(p2p, rx_freq, sa, da, da, 4552 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 4553 p2p_dbg(p2p, "Failed to send Action frame"); 4554 } 4555 wpabuf_free(resp); 4556 } 4557 4558 4559 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 4560 const u8 *sa, const u8 *data, size_t len) 4561 { 4562 struct p2p_message msg; 4563 4564 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response"); 4565 4566 if (p2p_parse(data, len, &msg) < 0) { 4567 p2p_dbg(p2p, "Failed to parse P2P Presence Response"); 4568 return; 4569 } 4570 4571 if (msg.status == NULL || msg.noa == NULL) { 4572 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response"); 4573 p2p_parse_free(&msg); 4574 return; 4575 } 4576 4577 if (p2p->cfg->presence_resp) { 4578 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status, 4579 msg.noa, msg.noa_len); 4580 } 4581 4582 if (*msg.status) { 4583 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u", 4584 *msg.status); 4585 p2p_parse_free(&msg); 4586 return; 4587 } 4588 4589 p2p_dbg(p2p, "P2P Presence Request was accepted"); 4590 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA", 4591 msg.noa, msg.noa_len); 4592 /* TODO: process NoA */ 4593 p2p_parse_free(&msg); 4594 } 4595 4596 4597 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx) 4598 { 4599 struct p2p_data *p2p = eloop_ctx; 4600 4601 if (p2p->ext_listen_interval) { 4602 /* Schedule next extended listen timeout */ 4603 eloop_register_timeout(p2p->ext_listen_interval_sec, 4604 p2p->ext_listen_interval_usec, 4605 p2p_ext_listen_timeout, p2p, NULL); 4606 } 4607 4608 if ((p2p->cfg->is_p2p_in_progress && 4609 p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) || 4610 (p2p->pending_action_state == P2P_PENDING_PD && 4611 p2p->pd_retries > 0)) { 4612 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)", 4613 p2p_state_txt(p2p->state)); 4614 return; 4615 } 4616 4617 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) { 4618 /* 4619 * This should not really happen, but it looks like the Listen 4620 * command may fail is something else (e.g., a scan) was 4621 * running at an inconvenient time. As a workaround, allow new 4622 * Extended Listen operation to be started. 4623 */ 4624 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again"); 4625 p2p->ext_listen_only = 0; 4626 p2p_set_state(p2p, P2P_IDLE); 4627 } 4628 4629 if (p2p->state != P2P_IDLE) { 4630 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state)); 4631 return; 4632 } 4633 4634 p2p_dbg(p2p, "Extended Listen timeout"); 4635 p2p->ext_listen_only = 1; 4636 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) { 4637 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing"); 4638 p2p->ext_listen_only = 0; 4639 } 4640 } 4641 4642 4643 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period, 4644 unsigned int interval) 4645 { 4646 if (period > 65535 || interval > 65535 || period > interval || 4647 (period == 0 && interval > 0) || (period > 0 && interval == 0)) { 4648 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u", 4649 period, interval); 4650 return -1; 4651 } 4652 4653 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 4654 4655 if (interval == 0) { 4656 p2p_dbg(p2p, "Disabling Extended Listen Timing"); 4657 p2p->ext_listen_period = 0; 4658 p2p->ext_listen_interval = 0; 4659 return 0; 4660 } 4661 4662 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec", 4663 period, interval); 4664 p2p->ext_listen_period = period; 4665 p2p->ext_listen_interval = interval; 4666 p2p->ext_listen_interval_sec = interval / 1000; 4667 p2p->ext_listen_interval_usec = (interval % 1000) * 1000; 4668 4669 eloop_register_timeout(p2p->ext_listen_interval_sec, 4670 p2p->ext_listen_interval_usec, 4671 p2p_ext_listen_timeout, p2p, NULL); 4672 4673 return 0; 4674 } 4675 4676 4677 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 4678 const u8 *ie, size_t ie_len) 4679 { 4680 struct p2p_message msg; 4681 4682 if (bssid == NULL || ie == NULL) 4683 return; 4684 4685 os_memset(&msg, 0, sizeof(msg)); 4686 if (p2p_parse_ies(ie, ie_len, &msg)) 4687 return; 4688 if (msg.minor_reason_code == NULL) { 4689 p2p_parse_free(&msg); 4690 return; 4691 } 4692 4693 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR 4694 " reason_code=%u minor_reason_code=%u", 4695 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4696 4697 p2p_parse_free(&msg); 4698 } 4699 4700 4701 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 4702 const u8 *ie, size_t ie_len) 4703 { 4704 struct p2p_message msg; 4705 4706 if (bssid == NULL || ie == NULL) 4707 return; 4708 4709 os_memset(&msg, 0, sizeof(msg)); 4710 if (p2p_parse_ies(ie, ie_len, &msg)) 4711 return; 4712 if (msg.minor_reason_code == NULL) { 4713 p2p_parse_free(&msg); 4714 return; 4715 } 4716 4717 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR 4718 " reason_code=%u minor_reason_code=%u", 4719 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 4720 4721 p2p_parse_free(&msg); 4722 } 4723 4724 4725 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled) 4726 { 4727 if (enabled) { 4728 p2p_dbg(p2p, "Managed P2P Device operations enabled"); 4729 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED; 4730 } else { 4731 p2p_dbg(p2p, "Managed P2P Device operations disabled"); 4732 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED; 4733 } 4734 } 4735 4736 4737 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class, 4738 u8 *op_channel) 4739 { 4740 return p2p_channel_random_social(&p2p->channels, op_class, op_channel); 4741 } 4742 4743 4744 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel, 4745 u8 forced) 4746 { 4747 if (p2p_channel_to_freq(reg_class, channel) < 0) 4748 return -1; 4749 4750 /* 4751 * Listen channel was set in configuration or set by control interface; 4752 * cannot override it. 4753 */ 4754 if (p2p->cfg->channel_forced && forced == 0) { 4755 p2p_dbg(p2p, 4756 "Listen channel was previously configured - do not override based on optimization"); 4757 return -1; 4758 } 4759 4760 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u", 4761 reg_class, channel); 4762 4763 if (p2p->state == P2P_IDLE) { 4764 p2p->cfg->reg_class = reg_class; 4765 p2p->cfg->channel = channel; 4766 p2p->cfg->channel_forced = forced; 4767 } else { 4768 p2p_dbg(p2p, "Defer setting listen channel"); 4769 p2p->pending_reg_class = reg_class; 4770 p2p->pending_channel = channel; 4771 p2p->pending_channel_forced = forced; 4772 } 4773 4774 return 0; 4775 } 4776 4777 4778 u8 p2p_get_listen_channel(struct p2p_data *p2p) 4779 { 4780 return p2p->cfg->channel; 4781 } 4782 4783 4784 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len) 4785 { 4786 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len)); 4787 if (postfix == NULL) { 4788 p2p->cfg->ssid_postfix_len = 0; 4789 return 0; 4790 } 4791 if (len > sizeof(p2p->cfg->ssid_postfix)) 4792 return -1; 4793 os_memcpy(p2p->cfg->ssid_postfix, postfix, len); 4794 p2p->cfg->ssid_postfix_len = len; 4795 return 0; 4796 } 4797 4798 4799 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel, 4800 int cfg_op_channel) 4801 { 4802 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0) 4803 return -1; 4804 4805 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u", 4806 op_reg_class, op_channel); 4807 p2p->cfg->op_reg_class = op_reg_class; 4808 p2p->cfg->op_channel = op_channel; 4809 p2p->cfg->cfg_op_channel = cfg_op_channel; 4810 return 0; 4811 } 4812 4813 4814 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan, 4815 const struct p2p_channel *pref_chan) 4816 { 4817 struct p2p_channel *n; 4818 4819 if (pref_chan) { 4820 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel)); 4821 if (n == NULL) 4822 return -1; 4823 os_memcpy(n, pref_chan, 4824 num_pref_chan * sizeof(struct p2p_channel)); 4825 } else 4826 n = NULL; 4827 4828 os_free(p2p->cfg->pref_chan); 4829 p2p->cfg->pref_chan = n; 4830 p2p->cfg->num_pref_chan = num_pref_chan; 4831 4832 return 0; 4833 } 4834 4835 4836 int p2p_set_no_go_freq(struct p2p_data *p2p, 4837 const struct wpa_freq_range_list *list) 4838 { 4839 struct wpa_freq_range *tmp; 4840 4841 if (list == NULL || list->num == 0) { 4842 os_free(p2p->no_go_freq.range); 4843 p2p->no_go_freq.range = NULL; 4844 p2p->no_go_freq.num = 0; 4845 return 0; 4846 } 4847 4848 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range)); 4849 if (tmp == NULL) 4850 return -1; 4851 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range)); 4852 os_free(p2p->no_go_freq.range); 4853 p2p->no_go_freq.range = tmp; 4854 p2p->no_go_freq.num = list->num; 4855 p2p_dbg(p2p, "Updated no GO chan list"); 4856 4857 return 0; 4858 } 4859 4860 4861 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr, 4862 u8 *iface_addr) 4863 { 4864 struct p2p_device *dev = p2p_get_device(p2p, dev_addr); 4865 if (dev == NULL || is_zero_ether_addr(dev->interface_addr)) 4866 return -1; 4867 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN); 4868 return 0; 4869 } 4870 4871 4872 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr, 4873 u8 *dev_addr) 4874 { 4875 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4876 if (dev == NULL) 4877 return -1; 4878 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN); 4879 return 0; 4880 } 4881 4882 4883 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr) 4884 { 4885 os_memcpy(p2p->peer_filter, addr, ETH_ALEN); 4886 if (is_zero_ether_addr(p2p->peer_filter)) 4887 p2p_dbg(p2p, "Disable peer filter"); 4888 else 4889 p2p_dbg(p2p, "Enable peer filter for " MACSTR, 4890 MAC2STR(p2p->peer_filter)); 4891 } 4892 4893 4894 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled) 4895 { 4896 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled"); 4897 if (p2p->cross_connect == enabled) 4898 return; 4899 p2p->cross_connect = enabled; 4900 /* TODO: may need to tear down any action group where we are GO(?) */ 4901 } 4902 4903 4904 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr) 4905 { 4906 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4907 if (dev == NULL) 4908 return -1; 4909 if (dev->oper_freq <= 0) 4910 return -1; 4911 return dev->oper_freq; 4912 } 4913 4914 4915 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled) 4916 { 4917 p2p_dbg(p2p, "Intra BSS distribution %s", 4918 enabled ? "enabled" : "disabled"); 4919 p2p->cfg->p2p_intra_bss = enabled; 4920 } 4921 4922 4923 void p2p_update_channel_list(struct p2p_data *p2p, 4924 const struct p2p_channels *chan, 4925 const struct p2p_channels *cli_chan) 4926 { 4927 p2p_dbg(p2p, "Update channel list"); 4928 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels)); 4929 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 4930 os_memcpy(&p2p->cfg->cli_channels, cli_chan, 4931 sizeof(struct p2p_channels)); 4932 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 4933 } 4934 4935 4936 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 4937 const u8 *src, const u8 *bssid, const u8 *buf, 4938 size_t len, unsigned int wait_time) 4939 { 4940 if (p2p->p2p_scan_running) { 4941 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes"); 4942 if (p2p->after_scan_tx) { 4943 p2p_dbg(p2p, "Dropped previous pending Action frame TX"); 4944 os_free(p2p->after_scan_tx); 4945 } 4946 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) + 4947 len); 4948 if (p2p->after_scan_tx == NULL) 4949 return -1; 4950 p2p->after_scan_tx->freq = freq; 4951 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN); 4952 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN); 4953 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN); 4954 p2p->after_scan_tx->len = len; 4955 p2p->after_scan_tx->wait_time = wait_time; 4956 os_memcpy(p2p->after_scan_tx + 1, buf, len); 4957 return 0; 4958 } 4959 4960 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid, 4961 buf, len, wait_time); 4962 } 4963 4964 4965 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5, 4966 int freq_overall) 4967 { 4968 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d", 4969 freq_24, freq_5, freq_overall); 4970 p2p->best_freq_24 = freq_24; 4971 p2p->best_freq_5 = freq_5; 4972 p2p->best_freq_overall = freq_overall; 4973 } 4974 4975 4976 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq) 4977 { 4978 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq); 4979 p2p->own_freq_preference = freq; 4980 } 4981 4982 4983 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p) 4984 { 4985 if (p2p == NULL || p2p->go_neg_peer == NULL) 4986 return NULL; 4987 return p2p->go_neg_peer->info.p2p_device_addr; 4988 } 4989 4990 4991 const struct p2p_peer_info * 4992 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next) 4993 { 4994 struct p2p_device *dev; 4995 4996 if (addr) { 4997 dev = p2p_get_device(p2p, addr); 4998 if (!dev) 4999 return NULL; 5000 5001 if (!next) { 5002 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 5003 return NULL; 5004 5005 return &dev->info; 5006 } else { 5007 do { 5008 dev = dl_list_first(&dev->list, 5009 struct p2p_device, 5010 list); 5011 if (!dev || &dev->list == &p2p->devices) 5012 return NULL; 5013 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY); 5014 } 5015 } else { 5016 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 5017 if (!dev) 5018 return NULL; 5019 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 5020 dev = dl_list_first(&dev->list, 5021 struct p2p_device, 5022 list); 5023 if (!dev || &dev->list == &p2p->devices) 5024 return NULL; 5025 } 5026 } 5027 5028 return &dev->info; 5029 } 5030 5031 5032 int p2p_in_progress(struct p2p_data *p2p) 5033 { 5034 if (p2p == NULL) 5035 return 0; 5036 if (p2p->state == P2P_SEARCH) 5037 return 2; 5038 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING; 5039 } 5040 5041 5042 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout, 5043 u8 client_timeout) 5044 { 5045 if (p2p) { 5046 p2p->go_timeout = go_timeout; 5047 p2p->client_timeout = client_timeout; 5048 } 5049 } 5050 5051 5052 #ifdef CONFIG_WIFI_DISPLAY 5053 5054 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p) 5055 { 5056 size_t g; 5057 struct p2p_group *group; 5058 5059 for (g = 0; g < p2p->num_groups; g++) { 5060 group = p2p->groups[g]; 5061 p2p_group_force_beacon_update_ies(group); 5062 } 5063 } 5064 5065 5066 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie) 5067 { 5068 wpabuf_free(p2p->wfd_ie_beacon); 5069 p2p->wfd_ie_beacon = ie; 5070 p2p_update_wfd_ie_groups(p2p); 5071 return 0; 5072 } 5073 5074 5075 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie) 5076 { 5077 wpabuf_free(p2p->wfd_ie_probe_req); 5078 p2p->wfd_ie_probe_req = ie; 5079 return 0; 5080 } 5081 5082 5083 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie) 5084 { 5085 wpabuf_free(p2p->wfd_ie_probe_resp); 5086 p2p->wfd_ie_probe_resp = ie; 5087 p2p_update_wfd_ie_groups(p2p); 5088 return 0; 5089 } 5090 5091 5092 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie) 5093 { 5094 wpabuf_free(p2p->wfd_ie_assoc_req); 5095 p2p->wfd_ie_assoc_req = ie; 5096 return 0; 5097 } 5098 5099 5100 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie) 5101 { 5102 wpabuf_free(p2p->wfd_ie_invitation); 5103 p2p->wfd_ie_invitation = ie; 5104 return 0; 5105 } 5106 5107 5108 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie) 5109 { 5110 wpabuf_free(p2p->wfd_ie_prov_disc_req); 5111 p2p->wfd_ie_prov_disc_req = ie; 5112 return 0; 5113 } 5114 5115 5116 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie) 5117 { 5118 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 5119 p2p->wfd_ie_prov_disc_resp = ie; 5120 return 0; 5121 } 5122 5123 5124 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie) 5125 { 5126 wpabuf_free(p2p->wfd_ie_go_neg); 5127 p2p->wfd_ie_go_neg = ie; 5128 return 0; 5129 } 5130 5131 5132 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem) 5133 { 5134 wpabuf_free(p2p->wfd_dev_info); 5135 if (elem) { 5136 p2p->wfd_dev_info = wpabuf_dup(elem); 5137 if (p2p->wfd_dev_info == NULL) 5138 return -1; 5139 } else 5140 p2p->wfd_dev_info = NULL; 5141 5142 return 0; 5143 } 5144 5145 5146 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem) 5147 { 5148 wpabuf_free(p2p->wfd_assoc_bssid); 5149 if (elem) { 5150 p2p->wfd_assoc_bssid = wpabuf_dup(elem); 5151 if (p2p->wfd_assoc_bssid == NULL) 5152 return -1; 5153 } else 5154 p2p->wfd_assoc_bssid = NULL; 5155 5156 return 0; 5157 } 5158 5159 5160 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p, 5161 const struct wpabuf *elem) 5162 { 5163 wpabuf_free(p2p->wfd_coupled_sink_info); 5164 if (elem) { 5165 p2p->wfd_coupled_sink_info = wpabuf_dup(elem); 5166 if (p2p->wfd_coupled_sink_info == NULL) 5167 return -1; 5168 } else 5169 p2p->wfd_coupled_sink_info = NULL; 5170 5171 return 0; 5172 } 5173 5174 #endif /* CONFIG_WIFI_DISPLAY */ 5175 5176 5177 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int, 5178 int max_disc_tu) 5179 { 5180 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0) 5181 return -1; 5182 5183 p2p->min_disc_int = min_disc_int; 5184 p2p->max_disc_int = max_disc_int; 5185 p2p->max_disc_tu = max_disc_tu; 5186 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d", 5187 min_disc_int, max_disc_int, max_disc_tu); 5188 5189 return 0; 5190 } 5191 5192 5193 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...) 5194 { 5195 va_list ap; 5196 char buf[500]; 5197 5198 if (!p2p->cfg->debug_print) 5199 return; 5200 5201 va_start(ap, fmt); 5202 vsnprintf(buf, sizeof(buf), fmt, ap); 5203 buf[sizeof(buf) - 1] = '\0'; 5204 va_end(ap); 5205 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf); 5206 } 5207 5208 5209 void p2p_info(struct p2p_data *p2p, const char *fmt, ...) 5210 { 5211 va_list ap; 5212 char buf[500]; 5213 5214 if (!p2p->cfg->debug_print) 5215 return; 5216 5217 va_start(ap, fmt); 5218 vsnprintf(buf, sizeof(buf), fmt, ap); 5219 buf[sizeof(buf) - 1] = '\0'; 5220 va_end(ap); 5221 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf); 5222 } 5223 5224 5225 void p2p_err(struct p2p_data *p2p, const char *fmt, ...) 5226 { 5227 va_list ap; 5228 char buf[500]; 5229 5230 if (!p2p->cfg->debug_print) 5231 return; 5232 5233 va_start(ap, fmt); 5234 vsnprintf(buf, sizeof(buf), fmt, ap); 5235 buf[sizeof(buf) - 1] = '\0'; 5236 va_end(ap); 5237 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf); 5238 } 5239 5240 5241 void p2p_loop_on_known_peers(struct p2p_data *p2p, 5242 void (*peer_callback)(struct p2p_peer_info *peer, 5243 void *user_data), 5244 void *user_data) 5245 { 5246 struct p2p_device *dev, *n; 5247 5248 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) { 5249 peer_callback(&dev->info, user_data); 5250 } 5251 } 5252 5253 5254 #ifdef CONFIG_WPS_NFC 5255 5256 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p, 5257 int client_freq, 5258 const u8 *go_dev_addr, 5259 const u8 *ssid, size_t ssid_len) 5260 { 5261 struct wpabuf *buf; 5262 u8 op_class, channel; 5263 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP; 5264 5265 buf = wpabuf_alloc(1000); 5266 if (buf == NULL) 5267 return NULL; 5268 5269 op_class = p2p->cfg->reg_class; 5270 channel = p2p->cfg->channel; 5271 5272 p2p_buf_add_capability(buf, p2p->dev_capab & 5273 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 5274 p2p_buf_add_device_info(buf, p2p, NULL); 5275 5276 if (p2p->num_groups > 0) { 5277 int freq = p2p_group_get_freq(p2p->groups[0]); 5278 role = P2P_GO_IN_A_GROUP; 5279 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) { 5280 p2p_dbg(p2p, 5281 "Unknown GO operating frequency %d MHz for NFC handover", 5282 freq); 5283 wpabuf_free(buf); 5284 return NULL; 5285 } 5286 } else if (client_freq > 0) { 5287 role = P2P_CLIENT_IN_A_GROUP; 5288 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) { 5289 p2p_dbg(p2p, 5290 "Unknown client operating frequency %d MHz for NFC handover", 5291 client_freq); 5292 wpabuf_free(buf); 5293 return NULL; 5294 } 5295 } 5296 5297 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class, 5298 channel, role); 5299 5300 if (p2p->num_groups > 0) { 5301 /* Limit number of clients to avoid very long message */ 5302 p2p_buf_add_group_info(p2p->groups[0], buf, 5); 5303 p2p_group_buf_add_id(p2p->groups[0], buf); 5304 } else if (client_freq > 0 && 5305 go_dev_addr && !is_zero_ether_addr(go_dev_addr) && 5306 ssid && ssid_len > 0) { 5307 /* 5308 * Add the optional P2P Group ID to indicate in which group this 5309 * device is a P2P Client. 5310 */ 5311 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len); 5312 } 5313 5314 return buf; 5315 } 5316 5317 5318 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p, 5319 int client_freq, 5320 const u8 *go_dev_addr, 5321 const u8 *ssid, size_t ssid_len) 5322 { 5323 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 5324 ssid_len); 5325 } 5326 5327 5328 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p, 5329 int client_freq, 5330 const u8 *go_dev_addr, 5331 const u8 *ssid, size_t ssid_len) 5332 { 5333 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 5334 ssid_len); 5335 } 5336 5337 5338 int p2p_process_nfc_connection_handover(struct p2p_data *p2p, 5339 struct p2p_nfc_params *params) 5340 { 5341 struct p2p_message msg; 5342 struct p2p_device *dev; 5343 const u8 *p2p_dev_addr; 5344 int freq; 5345 enum p2p_role_indication role; 5346 5347 params->next_step = NO_ACTION; 5348 5349 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len, 5350 params->p2p_attr, params->p2p_len, &msg)) { 5351 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC"); 5352 p2p_parse_free(&msg); 5353 return -1; 5354 } 5355 5356 if (msg.p2p_device_addr) 5357 p2p_dev_addr = msg.p2p_device_addr; 5358 else if (msg.device_id) 5359 p2p_dev_addr = msg.device_id; 5360 else { 5361 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 5362 p2p_parse_free(&msg); 5363 return -1; 5364 } 5365 5366 if (msg.oob_dev_password) { 5367 os_memcpy(params->oob_dev_pw, msg.oob_dev_password, 5368 msg.oob_dev_password_len); 5369 params->oob_dev_pw_len = msg.oob_dev_password_len; 5370 } 5371 5372 dev = p2p_create_device(p2p, p2p_dev_addr); 5373 if (dev == NULL) { 5374 p2p_parse_free(&msg); 5375 return -1; 5376 } 5377 5378 params->peer = &dev->info; 5379 5380 os_get_reltime(&dev->last_seen); 5381 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 5382 p2p_copy_wps_info(p2p, dev, 0, &msg); 5383 5384 if (!msg.oob_go_neg_channel) { 5385 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included"); 5386 p2p_parse_free(&msg); 5387 return -1; 5388 } 5389 5390 if (msg.oob_go_neg_channel[3] == 0 && 5391 msg.oob_go_neg_channel[4] == 0) 5392 freq = 0; 5393 else 5394 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3], 5395 msg.oob_go_neg_channel[4]); 5396 if (freq < 0) { 5397 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel"); 5398 p2p_parse_free(&msg); 5399 return -1; 5400 } 5401 role = msg.oob_go_neg_channel[5]; 5402 5403 if (role == P2P_GO_IN_A_GROUP) { 5404 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq); 5405 params->go_freq = freq; 5406 } else if (role == P2P_CLIENT_IN_A_GROUP) { 5407 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz", 5408 freq); 5409 params->go_freq = freq; 5410 } else 5411 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq); 5412 dev->oob_go_neg_freq = freq; 5413 5414 if (!params->sel && role != P2P_GO_IN_A_GROUP) { 5415 freq = p2p_channel_to_freq(p2p->cfg->reg_class, 5416 p2p->cfg->channel); 5417 if (freq < 0) { 5418 p2p_dbg(p2p, "Own listen channel not known"); 5419 p2p_parse_free(&msg); 5420 return -1; 5421 } 5422 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq); 5423 dev->oob_go_neg_freq = freq; 5424 } 5425 5426 if (msg.group_id) { 5427 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN); 5428 params->go_ssid_len = msg.group_id_len - ETH_ALEN; 5429 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN, 5430 params->go_ssid_len); 5431 } 5432 5433 if (dev->flags & P2P_DEV_USER_REJECTED) { 5434 p2p_dbg(p2p, "Do not report rejected device"); 5435 p2p_parse_free(&msg); 5436 return 0; 5437 } 5438 5439 if (!(dev->flags & P2P_DEV_REPORTED)) { 5440 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info, 5441 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 5442 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 5443 } 5444 p2p_parse_free(&msg); 5445 5446 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0) 5447 params->next_step = BOTH_GO; 5448 else if (role == P2P_GO_IN_A_GROUP) 5449 params->next_step = JOIN_GROUP; 5450 else if (role == P2P_CLIENT_IN_A_GROUP) { 5451 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 5452 params->next_step = PEER_CLIENT; 5453 } else if (p2p->num_groups > 0) 5454 params->next_step = AUTH_JOIN; 5455 else if (params->sel) 5456 params->next_step = INIT_GO_NEG; 5457 else 5458 params->next_step = RESP_GO_NEG; 5459 5460 return 0; 5461 } 5462 5463 5464 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id, 5465 int go_intent, 5466 const u8 *own_interface_addr) 5467 { 5468 5469 p2p->authorized_oob_dev_pw_id = dev_pw_id; 5470 if (dev_pw_id == 0) { 5471 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover"); 5472 return; 5473 } 5474 5475 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover", 5476 dev_pw_id); 5477 5478 p2p->go_intent = go_intent; 5479 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 5480 } 5481 5482 #endif /* CONFIG_WPS_NFC */ 5483 5484 5485 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len) 5486 { 5487 if (len < 8 || len > 63) 5488 return -1; 5489 p2p->cfg->passphrase_len = len; 5490 return 0; 5491 } 5492 5493 5494 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem) 5495 { 5496 p2p->vendor_elem = vendor_elem; 5497 } 5498 5499 5500 void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx) 5501 { 5502 struct p2p_data *p2p = eloop_ctx; 5503 5504 p2p_dbg(p2p, 5505 "Timeout on waiting peer to become ready for GO Negotiation"); 5506 p2p_go_neg_failed(p2p, -1); 5507 } 5508 5509 5510 void p2p_set_own_pref_freq_list(struct p2p_data *p2p, 5511 const unsigned int *pref_freq_list, 5512 unsigned int size) 5513 { 5514 unsigned int i; 5515 5516 if (size > P2P_MAX_PREF_CHANNELS) 5517 size = P2P_MAX_PREF_CHANNELS; 5518 p2p->num_pref_freq = size; 5519 for (i = 0; i < size; i++) { 5520 p2p->pref_freq_list[i] = pref_freq_list[i]; 5521 p2p_dbg(p2p, "Own preferred frequency list[%u]=%u MHz", 5522 i, p2p->pref_freq_list[i]); 5523 } 5524 } 5525 5526 5527 void p2p_set_override_pref_op_chan(struct p2p_data *p2p, u8 op_class, 5528 u8 chan) 5529 { 5530 p2p->override_pref_op_class = op_class; 5531 p2p->override_pref_channel = chan; 5532 } 5533 5534 5535 struct wpabuf * p2p_build_probe_resp_template(struct p2p_data *p2p, 5536 unsigned int freq) 5537 { 5538 struct wpabuf *ies, *buf; 5539 u8 addr[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 5540 int ret; 5541 5542 ies = p2p_build_probe_resp_ies(p2p, NULL, 0); 5543 if (!ies) { 5544 wpa_printf(MSG_ERROR, 5545 "CTRL: Failed to build Probe Response IEs"); 5546 return NULL; 5547 } 5548 5549 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 5550 if (!buf) { 5551 wpabuf_free(ies); 5552 return NULL; 5553 } 5554 5555 ret = p2p_build_probe_resp_buf(p2p, buf, ies, addr, freq); 5556 wpabuf_free(ies); 5557 if (ret) { 5558 wpabuf_free(buf); 5559 return NULL; 5560 } 5561 5562 return buf; 5563 } 5564
