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