1 /* 2 * Wi-Fi Direct - P2P module 3 * Copyright (c) 2009-2010, Atheros Communications 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "includes.h" 10 11 #include "common.h" 12 #include "eloop.h" 13 #include "common/ieee802_11_defs.h" 14 #include "common/ieee802_11_common.h" 15 #include "wps/wps_i.h" 16 #include "p2p_i.h" 17 #include "p2p.h" 18 19 20 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx); 21 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev); 22 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 23 const u8 *sa, const u8 *data, size_t len, 24 int rx_freq); 25 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 26 const u8 *sa, const u8 *data, 27 size_t len); 28 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx); 29 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx); 30 31 32 /* 33 * p2p_scan recovery timeout 34 * 35 * Many drivers are using 30 second timeout on scan results. Allow a bit larger 36 * timeout for this to avoid hitting P2P timeout unnecessarily. 37 */ 38 #define P2P_SCAN_TIMEOUT 35 39 40 /** 41 * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer 42 * entries will be removed 43 */ 44 #ifndef P2P_PEER_EXPIRATION_AGE 45 #define P2P_PEER_EXPIRATION_AGE 60 46 #endif /* P2P_PEER_EXPIRATION_AGE */ 47 48 #define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2) 49 50 static void p2p_expire_peers(struct p2p_data *p2p) 51 { 52 struct p2p_device *dev, *n; 53 struct os_reltime now; 54 size_t i; 55 56 os_get_reltime(&now); 57 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) { 58 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec) 59 continue; 60 61 if (dev == p2p->go_neg_peer) { 62 /* 63 * GO Negotiation is in progress with the peer, so 64 * don't expire the peer entry until GO Negotiation 65 * fails or times out. 66 */ 67 continue; 68 } 69 70 if (p2p->cfg->go_connected && 71 p2p->cfg->go_connected(p2p->cfg->cb_ctx, 72 dev->info.p2p_device_addr)) { 73 /* 74 * We are connected as a client to a group in which the 75 * peer is the GO, so do not expire the peer entry. 76 */ 77 os_get_reltime(&dev->last_seen); 78 continue; 79 } 80 81 for (i = 0; i < p2p->num_groups; i++) { 82 if (p2p_group_is_client_connected( 83 p2p->groups[i], dev->info.p2p_device_addr)) 84 break; 85 } 86 if (i < p2p->num_groups) { 87 /* 88 * The peer is connected as a client in a group where 89 * we are the GO, so do not expire the peer entry. 90 */ 91 os_get_reltime(&dev->last_seen); 92 continue; 93 } 94 95 p2p_dbg(p2p, "Expiring old peer entry " MACSTR, 96 MAC2STR(dev->info.p2p_device_addr)); 97 dl_list_del(&dev->list); 98 p2p_device_free(p2p, dev); 99 } 100 } 101 102 103 static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx) 104 { 105 struct p2p_data *p2p = eloop_ctx; 106 p2p_expire_peers(p2p); 107 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 108 p2p_expiration_timeout, p2p, NULL); 109 } 110 111 112 static const char * p2p_state_txt(int state) 113 { 114 switch (state) { 115 case P2P_IDLE: 116 return "IDLE"; 117 case P2P_SEARCH: 118 return "SEARCH"; 119 case P2P_CONNECT: 120 return "CONNECT"; 121 case P2P_CONNECT_LISTEN: 122 return "CONNECT_LISTEN"; 123 case P2P_GO_NEG: 124 return "GO_NEG"; 125 case P2P_LISTEN_ONLY: 126 return "LISTEN_ONLY"; 127 case P2P_WAIT_PEER_CONNECT: 128 return "WAIT_PEER_CONNECT"; 129 case P2P_WAIT_PEER_IDLE: 130 return "WAIT_PEER_IDLE"; 131 case P2P_SD_DURING_FIND: 132 return "SD_DURING_FIND"; 133 case P2P_PROVISIONING: 134 return "PROVISIONING"; 135 case P2P_PD_DURING_FIND: 136 return "PD_DURING_FIND"; 137 case P2P_INVITE: 138 return "INVITE"; 139 case P2P_INVITE_LISTEN: 140 return "INVITE_LISTEN"; 141 default: 142 return "?"; 143 } 144 } 145 146 147 const char * p2p_get_state_txt(struct p2p_data *p2p) 148 { 149 return p2p_state_txt(p2p->state); 150 } 151 152 153 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr) 154 { 155 struct p2p_device *dev = NULL; 156 157 if (!addr || !p2p) 158 return 0; 159 160 dev = p2p_get_device(p2p, addr); 161 if (dev) 162 return dev->wps_prov_info; 163 else 164 return 0; 165 } 166 167 168 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr) 169 { 170 struct p2p_device *dev = NULL; 171 172 if (!addr || !p2p) 173 return; 174 175 dev = p2p_get_device(p2p, addr); 176 if (dev) 177 dev->wps_prov_info = 0; 178 } 179 180 181 void p2p_set_state(struct p2p_data *p2p, int new_state) 182 { 183 p2p_dbg(p2p, "State %s -> %s", 184 p2p_state_txt(p2p->state), p2p_state_txt(new_state)); 185 p2p->state = new_state; 186 } 187 188 189 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec) 190 { 191 p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec", 192 p2p_state_txt(p2p->state), sec, usec); 193 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 194 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL); 195 } 196 197 198 void p2p_clear_timeout(struct p2p_data *p2p) 199 { 200 p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state)); 201 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 202 } 203 204 205 void p2p_go_neg_failed(struct p2p_data *p2p, struct p2p_device *peer, 206 int status) 207 { 208 struct p2p_go_neg_results res; 209 p2p_clear_timeout(p2p); 210 p2p_set_state(p2p, P2P_IDLE); 211 if (p2p->go_neg_peer) { 212 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 213 p2p->go_neg_peer->wps_method = WPS_NOT_READY; 214 p2p->go_neg_peer->oob_pw_id = 0; 215 } 216 p2p->go_neg_peer = NULL; 217 218 os_memset(&res, 0, sizeof(res)); 219 res.status = status; 220 if (peer) { 221 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, 222 ETH_ALEN); 223 os_memcpy(res.peer_interface_addr, peer->intended_addr, 224 ETH_ALEN); 225 } 226 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 227 } 228 229 230 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc) 231 { 232 unsigned int r, tu; 233 int freq; 234 struct wpabuf *ies; 235 236 p2p_dbg(p2p, "Starting short listen state (state=%s)", 237 p2p_state_txt(p2p->state)); 238 239 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 240 if (freq < 0) { 241 p2p_dbg(p2p, "Unknown regulatory class/channel"); 242 return; 243 } 244 245 os_get_random((u8 *) &r, sizeof(r)); 246 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) + 247 p2p->min_disc_int) * 100; 248 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu) 249 tu = p2p->max_disc_tu; 250 if (!dev_disc && tu < 100) 251 tu = 100; /* Need to wait in non-device discovery use cases */ 252 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen) 253 tu = p2p->cfg->max_listen * 1000 / 1024; 254 255 if (tu == 0) { 256 p2p_dbg(p2p, "Skip listen state since duration was 0 TU"); 257 p2p_set_timeout(p2p, 0, 0); 258 return; 259 } 260 261 p2p->pending_listen_freq = freq; 262 p2p->pending_listen_sec = 0; 263 p2p->pending_listen_usec = 1024 * tu; 264 265 ies = p2p_build_probe_resp_ies(p2p); 266 if (ies == NULL) 267 return; 268 269 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000, 270 ies) < 0) { 271 p2p_dbg(p2p, "Failed to start listen mode"); 272 p2p->pending_listen_freq = 0; 273 } 274 wpabuf_free(ies); 275 } 276 277 278 int p2p_listen(struct p2p_data *p2p, unsigned int timeout) 279 { 280 int freq; 281 struct wpabuf *ies; 282 283 p2p_dbg(p2p, "Going to listen(only) state"); 284 285 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 286 if (freq < 0) { 287 p2p_dbg(p2p, "Unknown regulatory class/channel"); 288 return -1; 289 } 290 291 p2p->pending_listen_freq = freq; 292 p2p->pending_listen_sec = timeout / 1000; 293 p2p->pending_listen_usec = (timeout % 1000) * 1000; 294 295 if (p2p->p2p_scan_running) { 296 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) { 297 p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen"); 298 return 0; 299 } 300 p2p_dbg(p2p, "p2p_scan running - delay start of listen state"); 301 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN; 302 return 0; 303 } 304 305 ies = p2p_build_probe_resp_ies(p2p); 306 if (ies == NULL) 307 return -1; 308 309 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) { 310 p2p_dbg(p2p, "Failed to start listen mode"); 311 p2p->pending_listen_freq = 0; 312 wpabuf_free(ies); 313 return -1; 314 } 315 wpabuf_free(ies); 316 317 p2p_set_state(p2p, P2P_LISTEN_ONLY); 318 319 return 0; 320 } 321 322 323 static void p2p_device_clear_reported(struct p2p_data *p2p) 324 { 325 struct p2p_device *dev; 326 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) 327 dev->flags &= ~P2P_DEV_REPORTED; 328 } 329 330 331 /** 332 * p2p_get_device - Fetch a peer entry 333 * @p2p: P2P module context from p2p_init() 334 * @addr: P2P Device Address of the peer 335 * Returns: Pointer to the device entry or %NULL if not found 336 */ 337 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr) 338 { 339 struct p2p_device *dev; 340 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 341 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0) 342 return dev; 343 } 344 return NULL; 345 } 346 347 348 /** 349 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address 350 * @p2p: P2P module context from p2p_init() 351 * @addr: P2P Interface Address of the peer 352 * Returns: Pointer to the device entry or %NULL if not found 353 */ 354 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p, 355 const u8 *addr) 356 { 357 struct p2p_device *dev; 358 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 359 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0) 360 return dev; 361 } 362 return NULL; 363 } 364 365 366 /** 367 * p2p_create_device - Create a peer entry 368 * @p2p: P2P module context from p2p_init() 369 * @addr: P2P Device Address of the peer 370 * Returns: Pointer to the device entry or %NULL on failure 371 * 372 * If there is already an entry for the peer, it will be returned instead of 373 * creating a new one. 374 */ 375 static struct p2p_device * p2p_create_device(struct p2p_data *p2p, 376 const u8 *addr) 377 { 378 struct p2p_device *dev, *oldest = NULL; 379 size_t count = 0; 380 381 dev = p2p_get_device(p2p, addr); 382 if (dev) 383 return dev; 384 385 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 386 count++; 387 if (oldest == NULL || 388 os_reltime_before(&dev->last_seen, &oldest->last_seen)) 389 oldest = dev; 390 } 391 if (count + 1 > p2p->cfg->max_peers && oldest) { 392 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer"); 393 dl_list_del(&oldest->list); 394 p2p_device_free(p2p, oldest); 395 } 396 397 dev = os_zalloc(sizeof(*dev)); 398 if (dev == NULL) 399 return NULL; 400 dl_list_add(&p2p->devices, &dev->list); 401 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN); 402 403 return dev; 404 } 405 406 407 static void p2p_copy_client_info(struct p2p_device *dev, 408 struct p2p_client_info *cli) 409 { 410 os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len); 411 dev->info.device_name[cli->dev_name_len] = '\0'; 412 dev->info.dev_capab = cli->dev_capab; 413 dev->info.config_methods = cli->config_methods; 414 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8); 415 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types; 416 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types, 417 dev->info.wps_sec_dev_type_list_len); 418 } 419 420 421 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr, 422 const u8 *go_interface_addr, int freq, 423 const u8 *gi, size_t gi_len) 424 { 425 struct p2p_group_info info; 426 size_t c; 427 struct p2p_device *dev; 428 429 if (gi == NULL) 430 return 0; 431 432 if (p2p_group_info_parse(gi, gi_len, &info) < 0) 433 return -1; 434 435 /* 436 * Clear old data for this group; if the devices are still in the 437 * group, the information will be restored in the loop following this. 438 */ 439 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 440 if (os_memcmp(dev->member_in_go_iface, go_interface_addr, 441 ETH_ALEN) == 0) { 442 os_memset(dev->member_in_go_iface, 0, ETH_ALEN); 443 os_memset(dev->member_in_go_dev, 0, ETH_ALEN); 444 } 445 } 446 447 for (c = 0; c < info.num_clients; c++) { 448 struct p2p_client_info *cli = &info.client[c]; 449 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr, 450 ETH_ALEN) == 0) 451 continue; /* ignore our own entry */ 452 dev = p2p_get_device(p2p, cli->p2p_device_addr); 453 if (dev) { 454 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY | 455 P2P_DEV_PROBE_REQ_ONLY)) { 456 /* 457 * Update information since we have not 458 * received this directly from the client. 459 */ 460 p2p_copy_client_info(dev, cli); 461 } else { 462 /* 463 * Need to update P2P Client Discoverability 464 * flag since it is valid only in P2P Group 465 * Info attribute. 466 */ 467 dev->info.dev_capab &= 468 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 469 dev->info.dev_capab |= 470 cli->dev_capab & 471 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 472 } 473 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 474 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 475 } 476 } else { 477 dev = p2p_create_device(p2p, cli->p2p_device_addr); 478 if (dev == NULL) 479 continue; 480 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 481 p2p_copy_client_info(dev, cli); 482 dev->oper_freq = freq; 483 p2p->cfg->dev_found(p2p->cfg->cb_ctx, 484 dev->info.p2p_device_addr, 485 &dev->info, 1); 486 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 487 } 488 489 os_memcpy(dev->interface_addr, cli->p2p_interface_addr, 490 ETH_ALEN); 491 os_get_reltime(&dev->last_seen); 492 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN); 493 os_memcpy(dev->member_in_go_iface, go_interface_addr, 494 ETH_ALEN); 495 } 496 497 return 0; 498 } 499 500 501 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev, 502 int probe_req, const struct p2p_message *msg) 503 { 504 os_memcpy(dev->info.device_name, msg->device_name, 505 sizeof(dev->info.device_name)); 506 507 if (msg->manufacturer && 508 msg->manufacturer_len < sizeof(dev->info.manufacturer)) { 509 os_memset(dev->info.manufacturer, 0, 510 sizeof(dev->info.manufacturer)); 511 os_memcpy(dev->info.manufacturer, msg->manufacturer, 512 msg->manufacturer_len); 513 } 514 515 if (msg->model_name && 516 msg->model_name_len < sizeof(dev->info.model_name)) { 517 os_memset(dev->info.model_name, 0, 518 sizeof(dev->info.model_name)); 519 os_memcpy(dev->info.model_name, msg->model_name, 520 msg->model_name_len); 521 } 522 523 if (msg->model_number && 524 msg->model_number_len < sizeof(dev->info.model_number)) { 525 os_memset(dev->info.model_number, 0, 526 sizeof(dev->info.model_number)); 527 os_memcpy(dev->info.model_number, msg->model_number, 528 msg->model_number_len); 529 } 530 531 if (msg->serial_number && 532 msg->serial_number_len < sizeof(dev->info.serial_number)) { 533 os_memset(dev->info.serial_number, 0, 534 sizeof(dev->info.serial_number)); 535 os_memcpy(dev->info.serial_number, msg->serial_number, 536 msg->serial_number_len); 537 } 538 539 if (msg->pri_dev_type) 540 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type, 541 sizeof(dev->info.pri_dev_type)); 542 else if (msg->wps_pri_dev_type) 543 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type, 544 sizeof(dev->info.pri_dev_type)); 545 546 if (msg->wps_sec_dev_type_list) { 547 os_memcpy(dev->info.wps_sec_dev_type_list, 548 msg->wps_sec_dev_type_list, 549 msg->wps_sec_dev_type_list_len); 550 dev->info.wps_sec_dev_type_list_len = 551 msg->wps_sec_dev_type_list_len; 552 } 553 554 if (msg->capability) { 555 /* 556 * P2P Client Discoverability bit is reserved in all frames 557 * that use this function, so do not change its value here. 558 */ 559 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 560 dev->info.dev_capab |= msg->capability[0] & 561 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 562 dev->info.group_capab = msg->capability[1]; 563 } 564 565 if (msg->ext_listen_timing) { 566 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing); 567 dev->ext_listen_interval = 568 WPA_GET_LE16(msg->ext_listen_timing + 2); 569 } 570 571 if (!probe_req) { 572 u16 new_config_methods; 573 new_config_methods = msg->config_methods ? 574 msg->config_methods : msg->wps_config_methods; 575 if (new_config_methods && 576 dev->info.config_methods != new_config_methods) { 577 p2p_dbg(p2p, "Update peer " MACSTR 578 " config_methods 0x%x -> 0x%x", 579 MAC2STR(dev->info.p2p_device_addr), 580 dev->info.config_methods, 581 new_config_methods); 582 dev->info.config_methods = new_config_methods; 583 } 584 } 585 } 586 587 588 /** 589 * p2p_add_device - Add peer entries based on scan results or P2P frames 590 * @p2p: P2P module context from p2p_init() 591 * @addr: Source address of Beacon or Probe Response frame (may be either 592 * P2P Device Address or P2P Interface Address) 593 * @level: Signal level (signal strength of the received frame from the peer) 594 * @freq: Frequency on which the Beacon or Probe Response frame was received 595 * @rx_time: Time when the result was received 596 * @ies: IEs from the Beacon or Probe Response frame 597 * @ies_len: Length of ies buffer in octets 598 * @scan_res: Whether this was based on scan results 599 * Returns: 0 on success, -1 on failure 600 * 601 * If the scan result is for a GO, the clients in the group will also be added 602 * to the peer table. This function can also be used with some other frames 603 * like Provision Discovery Request that contains P2P Capability and P2P Device 604 * Info attributes. 605 */ 606 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq, 607 struct os_reltime *rx_time, int level, const u8 *ies, 608 size_t ies_len, int scan_res) 609 { 610 struct p2p_device *dev; 611 struct p2p_message msg; 612 const u8 *p2p_dev_addr; 613 int i; 614 struct os_reltime time_now; 615 616 os_memset(&msg, 0, sizeof(msg)); 617 if (p2p_parse_ies(ies, ies_len, &msg)) { 618 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry"); 619 p2p_parse_free(&msg); 620 return -1; 621 } 622 623 if (msg.p2p_device_addr) 624 p2p_dev_addr = msg.p2p_device_addr; 625 else if (msg.device_id) 626 p2p_dev_addr = msg.device_id; 627 else { 628 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 629 p2p_parse_free(&msg); 630 return -1; 631 } 632 633 if (!is_zero_ether_addr(p2p->peer_filter) && 634 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) { 635 p2p_dbg(p2p, "Do not add peer filter for " MACSTR 636 " due to peer filter", MAC2STR(p2p_dev_addr)); 637 p2p_parse_free(&msg); 638 return 0; 639 } 640 641 dev = p2p_create_device(p2p, p2p_dev_addr); 642 if (dev == NULL) { 643 p2p_parse_free(&msg); 644 return -1; 645 } 646 647 if (rx_time == NULL) { 648 os_get_reltime(&time_now); 649 rx_time = &time_now; 650 } 651 652 /* 653 * Update the device entry only if the new peer 654 * entry is newer than the one previously stored. 655 */ 656 if (dev->last_seen.sec > 0 && 657 os_reltime_before(rx_time, &dev->last_seen)) { 658 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)", 659 (unsigned int) rx_time->sec, 660 (unsigned int) rx_time->usec, 661 (unsigned int) dev->last_seen.sec, 662 (unsigned int) dev->last_seen.usec); 663 p2p_parse_free(&msg); 664 return -1; 665 } 666 667 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime)); 668 669 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 670 671 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0) 672 os_memcpy(dev->interface_addr, addr, ETH_ALEN); 673 if (msg.ssid && 674 msg.ssid[1] <= sizeof(dev->oper_ssid) && 675 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 676 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 677 != 0)) { 678 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]); 679 dev->oper_ssid_len = msg.ssid[1]; 680 } 681 682 if (freq >= 2412 && freq <= 2484 && msg.ds_params && 683 *msg.ds_params >= 1 && *msg.ds_params <= 14) { 684 int ds_freq; 685 if (*msg.ds_params == 14) 686 ds_freq = 2484; 687 else 688 ds_freq = 2407 + *msg.ds_params * 5; 689 if (freq != ds_freq) { 690 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz", 691 freq, ds_freq); 692 freq = ds_freq; 693 } 694 } 695 696 if (dev->listen_freq && dev->listen_freq != freq && scan_res) { 697 p2p_dbg(p2p, "Update Listen frequency based on scan results (" 698 MACSTR " %d -> %d MHz (DS param %d)", 699 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq, 700 freq, msg.ds_params ? *msg.ds_params : -1); 701 } 702 if (scan_res) { 703 dev->listen_freq = freq; 704 if (msg.group_info) 705 dev->oper_freq = freq; 706 } 707 dev->info.level = level; 708 709 p2p_copy_wps_info(p2p, dev, 0, &msg); 710 711 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 712 wpabuf_free(dev->info.wps_vendor_ext[i]); 713 dev->info.wps_vendor_ext[i] = NULL; 714 } 715 716 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 717 if (msg.wps_vendor_ext[i] == NULL) 718 break; 719 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy( 720 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]); 721 if (dev->info.wps_vendor_ext[i] == NULL) 722 break; 723 } 724 725 if (msg.wfd_subelems) { 726 wpabuf_free(dev->info.wfd_subelems); 727 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 728 } 729 730 if (scan_res) { 731 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq, 732 msg.group_info, msg.group_info_len); 733 } 734 735 p2p_parse_free(&msg); 736 737 if (p2p_pending_sd_req(p2p, dev)) 738 dev->flags |= P2P_DEV_SD_SCHEDULE; 739 740 if (dev->flags & P2P_DEV_REPORTED) 741 return 0; 742 743 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)", 744 freq, (unsigned int) rx_time->sec, 745 (unsigned int) rx_time->usec); 746 if (dev->flags & P2P_DEV_USER_REJECTED) { 747 p2p_dbg(p2p, "Do not report rejected device"); 748 return 0; 749 } 750 751 if (dev->info.config_methods == 0 && 752 (freq == 2412 || freq == 2437 || freq == 2462)) { 753 /* 754 * If we have only seen a Beacon frame from a GO, we do not yet 755 * know what WPS config methods it supports. Since some 756 * applications use config_methods value from P2P-DEVICE-FOUND 757 * events, postpone reporting this peer until we've fully 758 * discovered its capabilities. 759 * 760 * At least for now, do this only if the peer was detected on 761 * one of the social channels since that peer can be easily be 762 * found again and there are no limitations of having to use 763 * passive scan on this channels, so this can be done through 764 * Probe Response frame that includes the config_methods 765 * information. 766 */ 767 p2p_dbg(p2p, "Do not report peer " MACSTR 768 " with unknown config methods", MAC2STR(addr)); 769 return 0; 770 } 771 772 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 773 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 774 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 775 776 return 0; 777 } 778 779 780 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev) 781 { 782 int i; 783 784 if (p2p->go_neg_peer == dev) { 785 /* 786 * If GO Negotiation is in progress, report that it has failed. 787 */ 788 p2p_go_neg_failed(p2p, dev, -1); 789 p2p->go_neg_peer = NULL; 790 } 791 if (p2p->invite_peer == dev) 792 p2p->invite_peer = NULL; 793 if (p2p->sd_peer == dev) 794 p2p->sd_peer = NULL; 795 if (p2p->pending_client_disc_go == dev) 796 p2p->pending_client_disc_go = NULL; 797 798 /* dev_lost() device, but only if it was previously dev_found() */ 799 if (dev->flags & P2P_DEV_REPORTED_ONCE) 800 p2p->cfg->dev_lost(p2p->cfg->cb_ctx, 801 dev->info.p2p_device_addr); 802 803 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 804 wpabuf_free(dev->info.wps_vendor_ext[i]); 805 dev->info.wps_vendor_ext[i] = NULL; 806 } 807 808 wpabuf_free(dev->info.wfd_subelems); 809 810 os_free(dev); 811 } 812 813 814 static int p2p_get_next_prog_freq(struct p2p_data *p2p) 815 { 816 struct p2p_channels *c; 817 struct p2p_reg_class *cla; 818 size_t cl, ch; 819 int found = 0; 820 u8 reg_class; 821 u8 channel; 822 int freq; 823 824 c = &p2p->cfg->channels; 825 for (cl = 0; cl < c->reg_classes; cl++) { 826 cla = &c->reg_class[cl]; 827 if (cla->reg_class != p2p->last_prog_scan_class) 828 continue; 829 for (ch = 0; ch < cla->channels; ch++) { 830 if (cla->channel[ch] == p2p->last_prog_scan_chan) { 831 found = 1; 832 break; 833 } 834 } 835 if (found) 836 break; 837 } 838 839 if (!found) { 840 /* Start from beginning */ 841 reg_class = c->reg_class[0].reg_class; 842 channel = c->reg_class[0].channel[0]; 843 } else { 844 /* Pick the next channel */ 845 ch++; 846 if (ch == cla->channels) { 847 cl++; 848 if (cl == c->reg_classes) 849 cl = 0; 850 ch = 0; 851 } 852 reg_class = c->reg_class[cl].reg_class; 853 channel = c->reg_class[cl].channel[ch]; 854 } 855 856 freq = p2p_channel_to_freq(reg_class, channel); 857 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz", 858 reg_class, channel, freq); 859 p2p->last_prog_scan_class = reg_class; 860 p2p->last_prog_scan_chan = channel; 861 862 if (freq == 2412 || freq == 2437 || freq == 2462) 863 return 0; /* No need to add social channels */ 864 return freq; 865 } 866 867 868 static void p2p_search(struct p2p_data *p2p) 869 { 870 int freq = 0; 871 enum p2p_scan_type type; 872 u16 pw_id = DEV_PW_DEFAULT; 873 int res; 874 875 if (p2p->drv_in_listen) { 876 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing"); 877 return; 878 } 879 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 880 881 if (p2p->find_type == P2P_FIND_PROGRESSIVE && 882 (freq = p2p_get_next_prog_freq(p2p)) > 0) { 883 type = P2P_SCAN_SOCIAL_PLUS_ONE; 884 p2p_dbg(p2p, "Starting search (+ freq %u)", freq); 885 } else { 886 type = P2P_SCAN_SOCIAL; 887 p2p_dbg(p2p, "Starting search"); 888 } 889 890 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq, 891 p2p->num_req_dev_types, p2p->req_dev_types, 892 p2p->find_dev_id, pw_id); 893 if (res < 0) { 894 p2p_dbg(p2p, "Scan request failed"); 895 p2p_continue_find(p2p); 896 } else { 897 p2p_dbg(p2p, "Running p2p_scan"); 898 p2p->p2p_scan_running = 1; 899 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 900 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 901 p2p, NULL); 902 } 903 } 904 905 906 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx) 907 { 908 struct p2p_data *p2p = eloop_ctx; 909 p2p_dbg(p2p, "Find timeout -> stop"); 910 p2p_stop_find(p2p); 911 } 912 913 914 static int p2p_run_after_scan(struct p2p_data *p2p) 915 { 916 struct p2p_device *dev; 917 enum p2p_after_scan op; 918 919 if (p2p->after_scan_tx) { 920 p2p->after_scan_tx_in_progress = 1; 921 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion"); 922 p2p->cfg->send_action(p2p->cfg->cb_ctx, 923 p2p->after_scan_tx->freq, 924 p2p->after_scan_tx->dst, 925 p2p->after_scan_tx->src, 926 p2p->after_scan_tx->bssid, 927 (u8 *) (p2p->after_scan_tx + 1), 928 p2p->after_scan_tx->len, 929 p2p->after_scan_tx->wait_time); 930 os_free(p2p->after_scan_tx); 931 p2p->after_scan_tx = NULL; 932 return 1; 933 } 934 935 op = p2p->start_after_scan; 936 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 937 switch (op) { 938 case P2P_AFTER_SCAN_NOTHING: 939 break; 940 case P2P_AFTER_SCAN_LISTEN: 941 p2p_dbg(p2p, "Start previously requested Listen state"); 942 p2p_listen(p2p, p2p->pending_listen_sec * 1000 + 943 p2p->pending_listen_usec / 1000); 944 return 1; 945 case P2P_AFTER_SCAN_CONNECT: 946 p2p_dbg(p2p, "Start previously requested connect with " MACSTR, 947 MAC2STR(p2p->after_scan_peer)); 948 dev = p2p_get_device(p2p, p2p->after_scan_peer); 949 if (dev == NULL) { 950 p2p_dbg(p2p, "Peer not known anymore"); 951 break; 952 } 953 p2p_connect_send(p2p, dev); 954 return 1; 955 } 956 957 return 0; 958 } 959 960 961 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx) 962 { 963 struct p2p_data *p2p = eloop_ctx; 964 int running; 965 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running); 966 running = p2p->p2p_scan_running; 967 /* Make sure we recover from missed scan results callback */ 968 p2p->p2p_scan_running = 0; 969 970 if (running) 971 p2p_run_after_scan(p2p); 972 } 973 974 975 static void p2p_free_req_dev_types(struct p2p_data *p2p) 976 { 977 p2p->num_req_dev_types = 0; 978 os_free(p2p->req_dev_types); 979 p2p->req_dev_types = NULL; 980 } 981 982 983 int p2p_find(struct p2p_data *p2p, unsigned int timeout, 984 enum p2p_discovery_type type, 985 unsigned int num_req_dev_types, const u8 *req_dev_types, 986 const u8 *dev_id, unsigned int search_delay) 987 { 988 int res; 989 990 p2p_dbg(p2p, "Starting find (type=%d)", type); 991 os_get_reltime(&p2p->find_start); 992 if (p2p->p2p_scan_running) { 993 p2p_dbg(p2p, "p2p_scan is already running"); 994 } 995 996 p2p_free_req_dev_types(p2p); 997 if (req_dev_types && num_req_dev_types) { 998 p2p->req_dev_types = os_malloc(num_req_dev_types * 999 WPS_DEV_TYPE_LEN); 1000 if (p2p->req_dev_types == NULL) 1001 return -1; 1002 os_memcpy(p2p->req_dev_types, req_dev_types, 1003 num_req_dev_types * WPS_DEV_TYPE_LEN); 1004 p2p->num_req_dev_types = num_req_dev_types; 1005 } 1006 1007 if (dev_id) { 1008 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN); 1009 p2p->find_dev_id = p2p->find_dev_id_buf; 1010 } else 1011 p2p->find_dev_id = NULL; 1012 1013 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1014 p2p_clear_timeout(p2p); 1015 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1016 p2p->find_type = type; 1017 p2p_device_clear_reported(p2p); 1018 p2p_set_state(p2p, P2P_SEARCH); 1019 p2p->search_delay = search_delay; 1020 p2p->in_search_delay = 0; 1021 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1022 p2p->last_p2p_find_timeout = timeout; 1023 if (timeout) 1024 eloop_register_timeout(timeout, 0, p2p_find_timeout, 1025 p2p, NULL); 1026 switch (type) { 1027 case P2P_FIND_START_WITH_FULL: 1028 case P2P_FIND_PROGRESSIVE: 1029 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0, 1030 p2p->num_req_dev_types, 1031 p2p->req_dev_types, dev_id, 1032 DEV_PW_DEFAULT); 1033 break; 1034 case P2P_FIND_ONLY_SOCIAL: 1035 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0, 1036 p2p->num_req_dev_types, 1037 p2p->req_dev_types, dev_id, 1038 DEV_PW_DEFAULT); 1039 break; 1040 default: 1041 return -1; 1042 } 1043 1044 if (res == 0) { 1045 p2p_dbg(p2p, "Running p2p_scan"); 1046 p2p->p2p_scan_running = 1; 1047 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 1048 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 1049 p2p, NULL); 1050 } else if (p2p->p2p_scan_running) { 1051 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running"); 1052 /* wait for the previous p2p_scan to complete */ 1053 } else { 1054 p2p_dbg(p2p, "Failed to start p2p_scan"); 1055 p2p_set_state(p2p, P2P_IDLE); 1056 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1057 } 1058 1059 return res; 1060 } 1061 1062 1063 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq) 1064 { 1065 p2p_dbg(p2p, "Stopping find"); 1066 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1067 p2p_clear_timeout(p2p); 1068 if (p2p->state == P2P_SEARCH) 1069 p2p->cfg->find_stopped(p2p->cfg->cb_ctx); 1070 p2p_set_state(p2p, P2P_IDLE); 1071 p2p_free_req_dev_types(p2p); 1072 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1073 if (p2p->go_neg_peer) 1074 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1075 p2p->go_neg_peer = NULL; 1076 p2p->sd_peer = NULL; 1077 p2p->invite_peer = NULL; 1078 p2p_stop_listen_for_freq(p2p, freq); 1079 } 1080 1081 1082 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq) 1083 { 1084 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) { 1085 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response"); 1086 return; 1087 } 1088 if (p2p->in_listen) { 1089 p2p->in_listen = 0; 1090 p2p_clear_timeout(p2p); 1091 } 1092 if (p2p->drv_in_listen) { 1093 /* 1094 * The driver may not deliver callback to p2p_listen_end() 1095 * when the operation gets canceled, so clear the internal 1096 * variable that is tracking driver state. 1097 */ 1098 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen); 1099 p2p->drv_in_listen = 0; 1100 } 1101 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1102 } 1103 1104 1105 void p2p_stop_listen(struct p2p_data *p2p) 1106 { 1107 if (p2p->state != P2P_LISTEN_ONLY) { 1108 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state."); 1109 return; 1110 } 1111 1112 p2p_stop_listen_for_freq(p2p, 0); 1113 p2p_set_state(p2p, P2P_IDLE); 1114 } 1115 1116 1117 void p2p_stop_find(struct p2p_data *p2p) 1118 { 1119 p2p_stop_find_for_freq(p2p, 0); 1120 } 1121 1122 1123 static int p2p_prepare_channel_pref(struct p2p_data *p2p, 1124 unsigned int force_freq, 1125 unsigned int pref_freq, int go) 1126 { 1127 u8 op_class, op_channel; 1128 unsigned int freq = force_freq ? force_freq : pref_freq; 1129 1130 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d", 1131 force_freq, pref_freq, go); 1132 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) { 1133 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq); 1134 return -1; 1135 } 1136 1137 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) && 1138 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class, 1139 op_channel))) { 1140 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P", 1141 freq, op_class, op_channel); 1142 return -1; 1143 } 1144 1145 p2p->op_reg_class = op_class; 1146 p2p->op_channel = op_channel; 1147 1148 if (force_freq) { 1149 p2p->channels.reg_classes = 1; 1150 p2p->channels.reg_class[0].channels = 1; 1151 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 1152 p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 1153 } else { 1154 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1155 sizeof(struct p2p_channels)); 1156 } 1157 1158 return 0; 1159 } 1160 1161 1162 static void p2p_prepare_channel_best(struct p2p_data *p2p) 1163 { 1164 u8 op_class, op_channel; 1165 const int op_classes_5ghz[] = { 124, 115, 0 }; 1166 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 }; 1167 const int op_classes_vht[] = { 128, 0 }; 1168 1169 p2p_dbg(p2p, "Prepare channel best"); 1170 1171 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 && 1172 p2p_supported_freq(p2p, p2p->best_freq_overall) && 1173 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel) 1174 == 0) { 1175 p2p_dbg(p2p, "Select best overall channel as operating channel preference"); 1176 p2p->op_reg_class = op_class; 1177 p2p->op_channel = op_channel; 1178 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 && 1179 p2p_supported_freq(p2p, p2p->best_freq_5) && 1180 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel) 1181 == 0) { 1182 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference"); 1183 p2p->op_reg_class = op_class; 1184 p2p->op_channel = op_channel; 1185 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 && 1186 p2p_supported_freq(p2p, p2p->best_freq_24) && 1187 p2p_freq_to_channel(p2p->best_freq_24, &op_class, 1188 &op_channel) == 0) { 1189 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference"); 1190 p2p->op_reg_class = op_class; 1191 p2p->op_channel = op_channel; 1192 } else if (p2p->cfg->num_pref_chan > 0 && 1193 p2p_channels_includes(&p2p->cfg->channels, 1194 p2p->cfg->pref_chan[0].op_class, 1195 p2p->cfg->pref_chan[0].chan)) { 1196 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference"); 1197 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class; 1198 p2p->op_channel = p2p->cfg->pref_chan[0].chan; 1199 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht, 1200 &p2p->op_reg_class, &p2p->op_channel) == 1201 0) { 1202 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference", 1203 p2p->op_reg_class, p2p->op_channel); 1204 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40, 1205 &p2p->op_reg_class, &p2p->op_channel) == 1206 0) { 1207 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference", 1208 p2p->op_reg_class, p2p->op_channel); 1209 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz, 1210 &p2p->op_reg_class, &p2p->op_channel) == 1211 0) { 1212 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference", 1213 p2p->op_reg_class, p2p->op_channel); 1214 } else { 1215 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference"); 1216 p2p->op_reg_class = p2p->cfg->op_reg_class; 1217 p2p->op_channel = p2p->cfg->op_channel; 1218 } 1219 1220 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1221 sizeof(struct p2p_channels)); 1222 } 1223 1224 1225 /** 1226 * p2p_prepare_channel - Select operating channel for GO Negotiation 1227 * @p2p: P2P module context from p2p_init() 1228 * @dev: Selected peer device 1229 * @force_freq: Forced frequency in MHz or 0 if not forced 1230 * @pref_freq: Preferred frequency in MHz or 0 if no preference 1231 * @go: Whether the local end will be forced to be GO 1232 * Returns: 0 on success, -1 on failure (channel not supported for P2P) 1233 * 1234 * This function is used to do initial operating channel selection for GO 1235 * Negotiation prior to having received peer information. The selected channel 1236 * may be further optimized in p2p_reselect_channel() once the peer information 1237 * is available. 1238 */ 1239 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev, 1240 unsigned int force_freq, unsigned int pref_freq, int go) 1241 { 1242 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d", 1243 force_freq, pref_freq, go); 1244 if (force_freq || pref_freq) { 1245 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) < 1246 0) 1247 return -1; 1248 } else { 1249 p2p_prepare_channel_best(p2p); 1250 } 1251 p2p_channels_dump(p2p, "prepared channels", &p2p->channels); 1252 if (go) 1253 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq); 1254 else if (!force_freq) 1255 p2p_channels_union(&p2p->channels, &p2p->cfg->cli_channels, 1256 &p2p->channels); 1257 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels); 1258 1259 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s", 1260 p2p->op_reg_class, p2p->op_channel, 1261 force_freq ? " (forced)" : ""); 1262 1263 if (force_freq) 1264 dev->flags |= P2P_DEV_FORCE_FREQ; 1265 else 1266 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1267 1268 return 0; 1269 } 1270 1271 1272 static void p2p_set_dev_persistent(struct p2p_device *dev, 1273 int persistent_group) 1274 { 1275 switch (persistent_group) { 1276 case 0: 1277 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP | 1278 P2P_DEV_PREFER_PERSISTENT_RECONN); 1279 break; 1280 case 1: 1281 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP; 1282 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN; 1283 break; 1284 case 2: 1285 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP | 1286 P2P_DEV_PREFER_PERSISTENT_RECONN; 1287 break; 1288 } 1289 } 1290 1291 1292 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr, 1293 enum p2p_wps_method wps_method, 1294 int go_intent, const u8 *own_interface_addr, 1295 unsigned int force_freq, int persistent_group, 1296 const u8 *force_ssid, size_t force_ssid_len, 1297 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id) 1298 { 1299 struct p2p_device *dev; 1300 1301 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR 1302 " GO Intent=%d Intended Interface Address=" MACSTR 1303 " wps_method=%d persistent_group=%d pd_before_go_neg=%d " 1304 "oob_pw_id=%u", 1305 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1306 wps_method, persistent_group, pd_before_go_neg, oob_pw_id); 1307 1308 dev = p2p_get_device(p2p, peer_addr); 1309 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 1310 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR, 1311 MAC2STR(peer_addr)); 1312 return -1; 1313 } 1314 1315 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, 1316 go_intent == 15) < 0) 1317 return -1; 1318 1319 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 1320 if (!(dev->info.dev_capab & 1321 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 1322 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1323 " that is in a group and is not discoverable", 1324 MAC2STR(peer_addr)); 1325 return -1; 1326 } 1327 if (dev->oper_freq <= 0) { 1328 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1329 " with incomplete information", 1330 MAC2STR(peer_addr)); 1331 return -1; 1332 } 1333 1334 /* 1335 * First, try to connect directly. If the peer does not 1336 * acknowledge frames, assume it is sleeping and use device 1337 * discoverability via the GO at that point. 1338 */ 1339 } 1340 1341 p2p->ssid_set = 0; 1342 if (force_ssid) { 1343 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1344 force_ssid, force_ssid_len); 1345 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1346 p2p->ssid_len = force_ssid_len; 1347 p2p->ssid_set = 1; 1348 } 1349 1350 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1351 dev->flags &= ~P2P_DEV_USER_REJECTED; 1352 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 1353 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1354 if (pd_before_go_neg) 1355 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG; 1356 else { 1357 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG; 1358 /* 1359 * Assign dialog token and tie breaker here to use the same 1360 * values in each retry within the same GO Negotiation exchange. 1361 */ 1362 dev->dialog_token++; 1363 if (dev->dialog_token == 0) 1364 dev->dialog_token = 1; 1365 dev->tie_breaker = p2p->next_tie_breaker; 1366 p2p->next_tie_breaker = !p2p->next_tie_breaker; 1367 } 1368 dev->connect_reqs = 0; 1369 dev->go_neg_req_sent = 0; 1370 dev->go_state = UNKNOWN_GO; 1371 p2p_set_dev_persistent(dev, persistent_group); 1372 p2p->go_intent = go_intent; 1373 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1374 1375 if (p2p->state != P2P_IDLE) 1376 p2p_stop_find(p2p); 1377 1378 if (p2p->after_scan_tx) { 1379 /* 1380 * We need to drop the pending frame to avoid issues with the 1381 * new GO Negotiation, e.g., when the pending frame was from a 1382 * previous attempt at starting a GO Negotiation. 1383 */ 1384 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion"); 1385 os_free(p2p->after_scan_tx); 1386 p2p->after_scan_tx = NULL; 1387 } 1388 1389 dev->wps_method = wps_method; 1390 dev->oob_pw_id = oob_pw_id; 1391 dev->status = P2P_SC_SUCCESS; 1392 1393 if (p2p->p2p_scan_running) { 1394 p2p_dbg(p2p, "p2p_scan running - delay connect send"); 1395 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT; 1396 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN); 1397 return 0; 1398 } 1399 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1400 1401 return p2p_connect_send(p2p, dev); 1402 } 1403 1404 1405 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr, 1406 enum p2p_wps_method wps_method, 1407 int go_intent, const u8 *own_interface_addr, 1408 unsigned int force_freq, int persistent_group, 1409 const u8 *force_ssid, size_t force_ssid_len, 1410 unsigned int pref_freq, u16 oob_pw_id) 1411 { 1412 struct p2p_device *dev; 1413 1414 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR 1415 " GO Intent=%d Intended Interface Address=" MACSTR 1416 " wps_method=%d persistent_group=%d oob_pw_id=%u", 1417 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1418 wps_method, persistent_group, oob_pw_id); 1419 1420 dev = p2p_get_device(p2p, peer_addr); 1421 if (dev == NULL) { 1422 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR, 1423 MAC2STR(peer_addr)); 1424 return -1; 1425 } 1426 1427 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent == 1428 15) < 0) 1429 return -1; 1430 1431 p2p->ssid_set = 0; 1432 if (force_ssid) { 1433 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1434 force_ssid, force_ssid_len); 1435 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1436 p2p->ssid_len = force_ssid_len; 1437 p2p->ssid_set = 1; 1438 } 1439 1440 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1441 dev->flags &= ~P2P_DEV_USER_REJECTED; 1442 dev->go_neg_req_sent = 0; 1443 dev->go_state = UNKNOWN_GO; 1444 p2p_set_dev_persistent(dev, persistent_group); 1445 p2p->go_intent = go_intent; 1446 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1447 1448 dev->wps_method = wps_method; 1449 dev->oob_pw_id = oob_pw_id; 1450 dev->status = P2P_SC_SUCCESS; 1451 1452 return 0; 1453 } 1454 1455 1456 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr, 1457 struct p2p_device *dev, struct p2p_message *msg) 1458 { 1459 os_get_reltime(&dev->last_seen); 1460 1461 p2p_copy_wps_info(p2p, dev, 0, msg); 1462 1463 if (msg->listen_channel) { 1464 int freq; 1465 freq = p2p_channel_to_freq(msg->listen_channel[3], 1466 msg->listen_channel[4]); 1467 if (freq < 0) { 1468 p2p_dbg(p2p, "Unknown peer Listen channel: " 1469 "country=%c%c(0x%02x) reg_class=%u channel=%u", 1470 msg->listen_channel[0], 1471 msg->listen_channel[1], 1472 msg->listen_channel[2], 1473 msg->listen_channel[3], 1474 msg->listen_channel[4]); 1475 } else { 1476 p2p_dbg(p2p, "Update peer " MACSTR 1477 " Listen channel: %u -> %u MHz", 1478 MAC2STR(dev->info.p2p_device_addr), 1479 dev->listen_freq, freq); 1480 dev->listen_freq = freq; 1481 } 1482 } 1483 1484 if (msg->wfd_subelems) { 1485 wpabuf_free(dev->info.wfd_subelems); 1486 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems); 1487 } 1488 1489 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 1490 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 1491 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request"); 1492 } else { 1493 p2p_dbg(p2p, "Created device entry based on GO Neg Req: " 1494 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' " 1495 "listen_freq=%d", 1496 MAC2STR(dev->info.p2p_device_addr), 1497 dev->info.dev_capab, dev->info.group_capab, 1498 dev->info.device_name, dev->listen_freq); 1499 } 1500 1501 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY; 1502 1503 if (dev->flags & P2P_DEV_USER_REJECTED) { 1504 p2p_dbg(p2p, "Do not report rejected device"); 1505 return; 1506 } 1507 1508 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 1509 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 1510 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 1511 } 1512 1513 1514 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len) 1515 { 1516 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 1517 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2); 1518 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2], 1519 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len); 1520 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len; 1521 } 1522 1523 1524 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params) 1525 { 1526 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len); 1527 p2p_random(params->passphrase, 8); 1528 return 0; 1529 } 1530 1531 1532 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer) 1533 { 1534 struct p2p_go_neg_results res; 1535 int go = peer->go_state == LOCAL_GO; 1536 struct p2p_channels intersection; 1537 int freqs; 1538 size_t i, j; 1539 1540 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)", 1541 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer"); 1542 1543 os_memset(&res, 0, sizeof(res)); 1544 res.role_go = go; 1545 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 1546 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 1547 res.wps_method = peer->wps_method; 1548 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 1549 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 1550 res.persistent_group = 2; 1551 else 1552 res.persistent_group = 1; 1553 } 1554 1555 if (go) { 1556 /* Setup AP mode for WPS provisioning */ 1557 res.freq = p2p_channel_to_freq(p2p->op_reg_class, 1558 p2p->op_channel); 1559 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1560 res.ssid_len = p2p->ssid_len; 1561 p2p_random(res.passphrase, 8); 1562 } else { 1563 res.freq = peer->oper_freq; 1564 if (p2p->ssid_len) { 1565 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1566 res.ssid_len = p2p->ssid_len; 1567 } 1568 } 1569 1570 p2p_channels_dump(p2p, "own channels", &p2p->channels); 1571 p2p_channels_dump(p2p, "peer channels", &peer->channels); 1572 p2p_channels_intersect(&p2p->channels, &peer->channels, 1573 &intersection); 1574 if (go) { 1575 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq); 1576 p2p_channels_dump(p2p, "intersection after no-GO removal", 1577 &intersection); 1578 } 1579 freqs = 0; 1580 for (i = 0; i < intersection.reg_classes; i++) { 1581 struct p2p_reg_class *c = &intersection.reg_class[i]; 1582 if (freqs + 1 == P2P_MAX_CHANNELS) 1583 break; 1584 for (j = 0; j < c->channels; j++) { 1585 int freq; 1586 if (freqs + 1 == P2P_MAX_CHANNELS) 1587 break; 1588 freq = p2p_channel_to_freq(c->reg_class, c->channel[j]); 1589 if (freq < 0) 1590 continue; 1591 res.freq_list[freqs++] = freq; 1592 } 1593 } 1594 1595 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout; 1596 1597 p2p_clear_timeout(p2p); 1598 p2p->ssid_set = 0; 1599 peer->go_neg_req_sent = 0; 1600 peer->wps_method = WPS_NOT_READY; 1601 peer->oob_pw_id = 0; 1602 1603 p2p_set_state(p2p, P2P_PROVISIONING); 1604 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 1605 } 1606 1607 1608 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa, 1609 const u8 *data, size_t len, int rx_freq) 1610 { 1611 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa)); 1612 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len); 1613 1614 if (len < 1) 1615 return; 1616 1617 switch (data[0]) { 1618 case P2P_GO_NEG_REQ: 1619 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq); 1620 break; 1621 case P2P_GO_NEG_RESP: 1622 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq); 1623 break; 1624 case P2P_GO_NEG_CONF: 1625 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1); 1626 break; 1627 case P2P_INVITATION_REQ: 1628 p2p_process_invitation_req(p2p, sa, data + 1, len - 1, 1629 rx_freq); 1630 break; 1631 case P2P_INVITATION_RESP: 1632 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 1633 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1); 1634 break; 1635 case P2P_PROV_DISC_REQ: 1636 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1637 break; 1638 case P2P_PROV_DISC_RESP: 1639 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1); 1640 break; 1641 case P2P_DEV_DISC_REQ: 1642 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1643 break; 1644 case P2P_DEV_DISC_RESP: 1645 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1); 1646 break; 1647 default: 1648 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d", 1649 data[0]); 1650 break; 1651 } 1652 } 1653 1654 1655 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, 1656 const u8 *sa, const u8 *bssid, const u8 *data, 1657 size_t len, int freq) 1658 { 1659 if (len < 1) 1660 return; 1661 1662 switch (data[0]) { 1663 case WLAN_PA_VENDOR_SPECIFIC: 1664 data++; 1665 len--; 1666 if (len < 3) 1667 return; 1668 if (WPA_GET_BE24(data) != OUI_WFA) 1669 return; 1670 1671 data += 3; 1672 len -= 3; 1673 if (len < 1) 1674 return; 1675 1676 if (*data != P2P_OUI_TYPE) 1677 return; 1678 1679 p2p_rx_p2p_action(p2p, sa, data + 1, len - 1, freq); 1680 break; 1681 case WLAN_PA_GAS_INITIAL_REQ: 1682 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq); 1683 break; 1684 case WLAN_PA_GAS_INITIAL_RESP: 1685 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq); 1686 break; 1687 case WLAN_PA_GAS_COMEBACK_REQ: 1688 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq); 1689 break; 1690 case WLAN_PA_GAS_COMEBACK_RESP: 1691 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq); 1692 break; 1693 } 1694 } 1695 1696 1697 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa, 1698 const u8 *bssid, u8 category, 1699 const u8 *data, size_t len, int freq) 1700 { 1701 if (category == WLAN_ACTION_PUBLIC) { 1702 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq); 1703 return; 1704 } 1705 1706 if (category != WLAN_ACTION_VENDOR_SPECIFIC) 1707 return; 1708 1709 if (len < 4) 1710 return; 1711 1712 if (WPA_GET_BE24(data) != OUI_WFA) 1713 return; 1714 data += 3; 1715 len -= 3; 1716 1717 if (*data != P2P_OUI_TYPE) 1718 return; 1719 data++; 1720 len--; 1721 1722 /* P2P action frame */ 1723 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa)); 1724 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len); 1725 1726 if (len < 1) 1727 return; 1728 switch (data[0]) { 1729 case P2P_NOA: 1730 p2p_dbg(p2p, "Received P2P Action - Notice of Absence"); 1731 /* TODO */ 1732 break; 1733 case P2P_PRESENCE_REQ: 1734 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq); 1735 break; 1736 case P2P_PRESENCE_RESP: 1737 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1); 1738 break; 1739 case P2P_GO_DISC_REQ: 1740 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq); 1741 break; 1742 default: 1743 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]); 1744 break; 1745 } 1746 } 1747 1748 1749 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx) 1750 { 1751 struct p2p_data *p2p = eloop_ctx; 1752 if (p2p->go_neg_peer == NULL) 1753 return; 1754 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1755 p2p->go_neg_peer->status = P2P_SC_SUCCESS; 1756 p2p_connect_send(p2p, p2p->go_neg_peer); 1757 } 1758 1759 1760 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx) 1761 { 1762 struct p2p_data *p2p = eloop_ctx; 1763 if (p2p->invite_peer == NULL) 1764 return; 1765 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1766 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr, 1767 p2p->invite_dev_pw_id); 1768 } 1769 1770 1771 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr, 1772 const u8 *ie, size_t ie_len) 1773 { 1774 struct p2p_message msg; 1775 struct p2p_device *dev; 1776 1777 os_memset(&msg, 0, sizeof(msg)); 1778 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL) 1779 { 1780 p2p_parse_free(&msg); 1781 return; /* not a P2P probe */ 1782 } 1783 1784 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 1785 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 1786 != 0) { 1787 /* The Probe Request is not part of P2P Device Discovery. It is 1788 * not known whether the source address of the frame is the P2P 1789 * Device Address or P2P Interface Address. Do not add a new 1790 * peer entry based on this frames. 1791 */ 1792 p2p_parse_free(&msg); 1793 return; 1794 } 1795 1796 dev = p2p_get_device(p2p, addr); 1797 if (dev) { 1798 if (dev->country[0] == 0 && msg.listen_channel) 1799 os_memcpy(dev->country, msg.listen_channel, 3); 1800 os_get_reltime(&dev->last_seen); 1801 p2p_parse_free(&msg); 1802 return; /* already known */ 1803 } 1804 1805 dev = p2p_create_device(p2p, addr); 1806 if (dev == NULL) { 1807 p2p_parse_free(&msg); 1808 return; 1809 } 1810 1811 os_get_reltime(&dev->last_seen); 1812 dev->flags |= P2P_DEV_PROBE_REQ_ONLY; 1813 1814 if (msg.listen_channel) { 1815 os_memcpy(dev->country, msg.listen_channel, 3); 1816 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3], 1817 msg.listen_channel[4]); 1818 } 1819 1820 p2p_copy_wps_info(p2p, dev, 1, &msg); 1821 1822 if (msg.wfd_subelems) { 1823 wpabuf_free(dev->info.wfd_subelems); 1824 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 1825 } 1826 1827 p2p_parse_free(&msg); 1828 1829 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR 1830 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d", 1831 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab, 1832 dev->info.group_capab, dev->info.device_name, 1833 dev->listen_freq); 1834 } 1835 1836 1837 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p, 1838 const u8 *addr, 1839 struct p2p_message *msg) 1840 { 1841 struct p2p_device *dev; 1842 1843 dev = p2p_get_device(p2p, addr); 1844 if (dev) { 1845 os_get_reltime(&dev->last_seen); 1846 return dev; /* already known */ 1847 } 1848 1849 dev = p2p_create_device(p2p, addr); 1850 if (dev == NULL) 1851 return NULL; 1852 1853 p2p_add_dev_info(p2p, addr, dev, msg); 1854 1855 return dev; 1856 } 1857 1858 1859 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type) 1860 { 1861 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0) 1862 return 1; 1863 if (os_memcmp(dev_type, req_dev_type, 2) == 0 && 1864 WPA_GET_BE32(&req_dev_type[2]) == 0 && 1865 WPA_GET_BE16(&req_dev_type[6]) == 0) 1866 return 1; /* Category match with wildcard OUI/sub-category */ 1867 return 0; 1868 } 1869 1870 1871 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[], 1872 size_t num_req_dev_type) 1873 { 1874 size_t i; 1875 for (i = 0; i < num_req_dev_type; i++) { 1876 if (dev_type_match(dev_type, req_dev_type[i])) 1877 return 1; 1878 } 1879 return 0; 1880 } 1881 1882 1883 /** 1884 * p2p_match_dev_type - Match local device type with requested type 1885 * @p2p: P2P module context from p2p_init() 1886 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) 1887 * Returns: 1 on match, 0 on mismatch 1888 * 1889 * This function can be used to match the Requested Device Type attribute in 1890 * WPS IE with the local device types for deciding whether to reply to a Probe 1891 * Request frame. 1892 */ 1893 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps) 1894 { 1895 struct wps_parse_attr attr; 1896 size_t i; 1897 1898 if (wps_parse_msg(wps, &attr)) 1899 return 1; /* assume no Requested Device Type attributes */ 1900 1901 if (attr.num_req_dev_type == 0) 1902 return 1; /* no Requested Device Type attributes -> match */ 1903 1904 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type, 1905 attr.num_req_dev_type)) 1906 return 1; /* Own Primary Device Type matches */ 1907 1908 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) 1909 if (dev_type_list_match(p2p->cfg->sec_dev_type[i], 1910 attr.req_dev_type, 1911 attr.num_req_dev_type)) 1912 return 1; /* Own Secondary Device Type matches */ 1913 1914 /* No matching device type found */ 1915 return 0; 1916 } 1917 1918 1919 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p) 1920 { 1921 struct wpabuf *buf; 1922 u8 *len; 1923 int pw_id = -1; 1924 size_t extra = 0; 1925 1926 #ifdef CONFIG_WIFI_DISPLAY 1927 if (p2p->wfd_ie_probe_resp) 1928 extra = wpabuf_len(p2p->wfd_ie_probe_resp); 1929 #endif /* CONFIG_WIFI_DISPLAY */ 1930 1931 buf = wpabuf_alloc(1000 + extra); 1932 if (buf == NULL) 1933 return NULL; 1934 1935 if (p2p->go_neg_peer) { 1936 /* Advertise immediate availability of WPS credential */ 1937 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method); 1938 } 1939 1940 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) { 1941 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response"); 1942 wpabuf_free(buf); 1943 return NULL; 1944 } 1945 1946 #ifdef CONFIG_WIFI_DISPLAY 1947 if (p2p->wfd_ie_probe_resp) 1948 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp); 1949 #endif /* CONFIG_WIFI_DISPLAY */ 1950 1951 /* P2P IE */ 1952 len = p2p_buf_add_ie_hdr(buf); 1953 p2p_buf_add_capability(buf, p2p->dev_capab & 1954 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 1955 if (p2p->ext_listen_interval) 1956 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 1957 p2p->ext_listen_interval); 1958 p2p_buf_add_device_info(buf, p2p, NULL); 1959 p2p_buf_update_ie_hdr(buf, len); 1960 1961 return buf; 1962 } 1963 1964 1965 static enum p2p_probe_req_status 1966 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 1967 const u8 *bssid, const u8 *ie, size_t ie_len) 1968 { 1969 struct ieee802_11_elems elems; 1970 struct wpabuf *buf; 1971 struct ieee80211_mgmt *resp; 1972 struct p2p_message msg; 1973 struct wpabuf *ies; 1974 1975 if (!p2p->in_listen || !p2p->drv_in_listen) { 1976 /* not in Listen state - ignore Probe Request */ 1977 return P2P_PREQ_NOT_LISTEN; 1978 } 1979 1980 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) == 1981 ParseFailed) { 1982 /* Ignore invalid Probe Request frames */ 1983 return P2P_PREQ_MALFORMED; 1984 } 1985 1986 if (elems.p2p == NULL) { 1987 /* not a P2P probe - ignore it */ 1988 return P2P_PREQ_NOT_P2P; 1989 } 1990 1991 if (dst && !is_broadcast_ether_addr(dst) && 1992 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 1993 /* Not sent to the broadcast address or our P2P Device Address 1994 */ 1995 return P2P_PREQ_NOT_PROCESSED; 1996 } 1997 1998 if (bssid && !is_broadcast_ether_addr(bssid)) { 1999 /* Not sent to the Wildcard BSSID */ 2000 return P2P_PREQ_NOT_PROCESSED; 2001 } 2002 2003 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN || 2004 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) != 2005 0) { 2006 /* not using P2P Wildcard SSID - ignore */ 2007 return P2P_PREQ_NOT_PROCESSED; 2008 } 2009 2010 if (supp_rates_11b_only(&elems)) { 2011 /* Indicates support for 11b rates only */ 2012 return P2P_PREQ_NOT_P2P; 2013 } 2014 2015 os_memset(&msg, 0, sizeof(msg)); 2016 if (p2p_parse_ies(ie, ie_len, &msg) < 0) { 2017 /* Could not parse P2P attributes */ 2018 return P2P_PREQ_NOT_P2P; 2019 } 2020 2021 if (msg.device_id && 2022 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2023 /* Device ID did not match */ 2024 p2p_parse_free(&msg); 2025 return P2P_PREQ_NOT_PROCESSED; 2026 } 2027 2028 /* Check Requested Device Type match */ 2029 if (msg.wps_attributes && 2030 !p2p_match_dev_type(p2p, msg.wps_attributes)) { 2031 /* No match with Requested Device Type */ 2032 p2p_parse_free(&msg); 2033 return P2P_PREQ_NOT_PROCESSED; 2034 } 2035 p2p_parse_free(&msg); 2036 2037 if (!p2p->cfg->send_probe_resp) { 2038 /* Response generated elsewhere */ 2039 return P2P_PREQ_NOT_PROCESSED; 2040 } 2041 2042 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state"); 2043 2044 /* 2045 * We do not really have a specific BSS that this frame is advertising, 2046 * so build a frame that has some information in valid format. This is 2047 * really only used for discovery purposes, not to learn exact BSS 2048 * parameters. 2049 */ 2050 ies = p2p_build_probe_resp_ies(p2p); 2051 if (ies == NULL) 2052 return P2P_PREQ_NOT_PROCESSED; 2053 2054 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 2055 if (buf == NULL) { 2056 wpabuf_free(ies); 2057 return P2P_PREQ_NOT_PROCESSED; 2058 } 2059 2060 resp = NULL; 2061 resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp); 2062 2063 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 2064 (WLAN_FC_STYPE_PROBE_RESP << 4)); 2065 os_memcpy(resp->da, addr, ETH_ALEN); 2066 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN); 2067 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN); 2068 resp->u.probe_resp.beacon_int = host_to_le16(100); 2069 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 2070 resp->u.probe_resp.capab_info = 2071 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE | 2072 WLAN_CAPABILITY_PRIVACY | 2073 WLAN_CAPABILITY_SHORT_SLOT_TIME); 2074 2075 wpabuf_put_u8(buf, WLAN_EID_SSID); 2076 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN); 2077 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 2078 2079 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES); 2080 wpabuf_put_u8(buf, 8); 2081 wpabuf_put_u8(buf, (60 / 5) | 0x80); 2082 wpabuf_put_u8(buf, 90 / 5); 2083 wpabuf_put_u8(buf, (120 / 5) | 0x80); 2084 wpabuf_put_u8(buf, 180 / 5); 2085 wpabuf_put_u8(buf, (240 / 5) | 0x80); 2086 wpabuf_put_u8(buf, 360 / 5); 2087 wpabuf_put_u8(buf, 480 / 5); 2088 wpabuf_put_u8(buf, 540 / 5); 2089 2090 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS); 2091 wpabuf_put_u8(buf, 1); 2092 wpabuf_put_u8(buf, p2p->cfg->channel); 2093 2094 wpabuf_put_buf(buf, ies); 2095 wpabuf_free(ies); 2096 2097 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf); 2098 2099 wpabuf_free(buf); 2100 2101 return P2P_PREQ_NOT_PROCESSED; 2102 } 2103 2104 2105 enum p2p_probe_req_status 2106 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2107 const u8 *bssid, const u8 *ie, size_t ie_len) 2108 { 2109 enum p2p_probe_req_status res; 2110 2111 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len); 2112 2113 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len); 2114 2115 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) && 2116 p2p->go_neg_peer && 2117 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN) 2118 == 0 && 2119 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 2120 /* Received a Probe Request from GO Negotiation peer */ 2121 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout"); 2122 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2123 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL); 2124 return P2P_PREQ_PROCESSED; 2125 } 2126 2127 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) && 2128 p2p->invite_peer && 2129 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN) 2130 == 0) { 2131 /* Received a Probe Request from Invite peer */ 2132 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout"); 2133 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL); 2134 return P2P_PREQ_PROCESSED; 2135 } 2136 2137 return res; 2138 } 2139 2140 2141 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid, 2142 u8 *buf, size_t len, struct wpabuf *p2p_ie) 2143 { 2144 struct wpabuf *tmp; 2145 u8 *lpos; 2146 size_t tmplen; 2147 int res; 2148 u8 group_capab; 2149 2150 if (p2p_ie == NULL) 2151 return 0; /* WLAN AP is not a P2P manager */ 2152 2153 /* 2154 * (Re)Association Request - P2P IE 2155 * P2P Capability attribute (shall be present) 2156 * P2P Interface attribute (present if concurrent device and 2157 * P2P Management is enabled) 2158 */ 2159 tmp = wpabuf_alloc(200); 2160 if (tmp == NULL) 2161 return -1; 2162 2163 lpos = p2p_buf_add_ie_hdr(tmp); 2164 group_capab = 0; 2165 if (p2p->num_groups > 0) { 2166 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; 2167 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2168 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) && 2169 p2p->cross_connect) 2170 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 2171 } 2172 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab); 2173 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2174 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED)) 2175 p2p_buf_add_p2p_interface(tmp, p2p); 2176 p2p_buf_update_ie_hdr(tmp, lpos); 2177 2178 tmplen = wpabuf_len(tmp); 2179 if (tmplen > len) 2180 res = -1; 2181 else { 2182 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2183 res = tmplen; 2184 } 2185 wpabuf_free(tmp); 2186 2187 return res; 2188 } 2189 2190 2191 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf, 2192 size_t len, int p2p_group, struct wpabuf *p2p_ie) 2193 { 2194 struct wpabuf *tmp; 2195 u8 *lpos; 2196 struct p2p_device *peer; 2197 size_t tmplen; 2198 int res; 2199 size_t extra = 0; 2200 2201 if (!p2p_group) 2202 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie); 2203 2204 #ifdef CONFIG_WIFI_DISPLAY 2205 if (p2p->wfd_ie_assoc_req) 2206 extra = wpabuf_len(p2p->wfd_ie_assoc_req); 2207 #endif /* CONFIG_WIFI_DISPLAY */ 2208 2209 /* 2210 * (Re)Association Request - P2P IE 2211 * P2P Capability attribute (shall be present) 2212 * Extended Listen Timing (may be present) 2213 * P2P Device Info attribute (shall be present) 2214 */ 2215 tmp = wpabuf_alloc(200 + extra); 2216 if (tmp == NULL) 2217 return -1; 2218 2219 #ifdef CONFIG_WIFI_DISPLAY 2220 if (p2p->wfd_ie_assoc_req) 2221 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req); 2222 #endif /* CONFIG_WIFI_DISPLAY */ 2223 2224 peer = bssid ? p2p_get_device(p2p, bssid) : NULL; 2225 2226 lpos = p2p_buf_add_ie_hdr(tmp); 2227 p2p_buf_add_capability(tmp, p2p->dev_capab, 0); 2228 if (p2p->ext_listen_interval) 2229 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period, 2230 p2p->ext_listen_interval); 2231 p2p_buf_add_device_info(tmp, p2p, peer); 2232 p2p_buf_update_ie_hdr(tmp, lpos); 2233 2234 tmplen = wpabuf_len(tmp); 2235 if (tmplen > len) 2236 res = -1; 2237 else { 2238 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2239 res = tmplen; 2240 } 2241 wpabuf_free(tmp); 2242 2243 return res; 2244 } 2245 2246 2247 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) 2248 { 2249 struct wpabuf *p2p_ie; 2250 int ret; 2251 2252 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); 2253 if (p2p_ie == NULL) 2254 return 0; 2255 2256 ret = p2p_attr_text(p2p_ie, buf, end); 2257 wpabuf_free(p2p_ie); 2258 return ret; 2259 } 2260 2261 2262 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr) 2263 { 2264 struct p2p_message msg; 2265 2266 os_memset(&msg, 0, sizeof(msg)); 2267 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 2268 return -1; 2269 2270 if (msg.p2p_device_addr) { 2271 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); 2272 return 0; 2273 } else if (msg.device_id) { 2274 os_memcpy(dev_addr, msg.device_id, ETH_ALEN); 2275 return 0; 2276 } 2277 return -1; 2278 } 2279 2280 2281 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr) 2282 { 2283 struct wpabuf *p2p_ie; 2284 int ret; 2285 2286 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 2287 P2P_IE_VENDOR_TYPE); 2288 if (p2p_ie == NULL) 2289 return -1; 2290 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr); 2291 wpabuf_free(p2p_ie); 2292 return ret; 2293 } 2294 2295 2296 static void p2p_clear_go_neg(struct p2p_data *p2p) 2297 { 2298 p2p->go_neg_peer = NULL; 2299 p2p_clear_timeout(p2p); 2300 p2p_set_state(p2p, P2P_IDLE); 2301 } 2302 2303 2304 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr) 2305 { 2306 if (p2p->go_neg_peer == NULL) { 2307 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification"); 2308 return; /* No pending Group Formation */ 2309 } 2310 2311 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) != 2312 0) { 2313 p2p_dbg(p2p, "Ignore WPS registration success notification for " 2314 MACSTR " (GO Negotiation peer " MACSTR ")", 2315 MAC2STR(mac_addr), 2316 MAC2STR(p2p->go_neg_peer->intended_addr)); 2317 return; /* Ignore unexpected peer address */ 2318 } 2319 2320 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR, 2321 MAC2STR(mac_addr)); 2322 2323 p2p_clear_go_neg(p2p); 2324 } 2325 2326 2327 void p2p_group_formation_failed(struct p2p_data *p2p) 2328 { 2329 if (p2p->go_neg_peer == NULL) { 2330 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification"); 2331 return; /* No pending Group Formation */ 2332 } 2333 2334 p2p_dbg(p2p, "Group Formation failed with " MACSTR, 2335 MAC2STR(p2p->go_neg_peer->intended_addr)); 2336 2337 p2p_clear_go_neg(p2p); 2338 } 2339 2340 2341 struct p2p_data * p2p_init(const struct p2p_config *cfg) 2342 { 2343 struct p2p_data *p2p; 2344 2345 if (cfg->max_peers < 1) 2346 return NULL; 2347 2348 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg)); 2349 if (p2p == NULL) 2350 return NULL; 2351 p2p->cfg = (struct p2p_config *) (p2p + 1); 2352 os_memcpy(p2p->cfg, cfg, sizeof(*cfg)); 2353 if (cfg->dev_name) 2354 p2p->cfg->dev_name = os_strdup(cfg->dev_name); 2355 if (cfg->manufacturer) 2356 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer); 2357 if (cfg->model_name) 2358 p2p->cfg->model_name = os_strdup(cfg->model_name); 2359 if (cfg->model_number) 2360 p2p->cfg->model_number = os_strdup(cfg->model_number); 2361 if (cfg->serial_number) 2362 p2p->cfg->serial_number = os_strdup(cfg->serial_number); 2363 if (cfg->pref_chan) { 2364 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan * 2365 sizeof(struct p2p_channel)); 2366 if (p2p->cfg->pref_chan) { 2367 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan, 2368 cfg->num_pref_chan * 2369 sizeof(struct p2p_channel)); 2370 } else 2371 p2p->cfg->num_pref_chan = 0; 2372 } 2373 2374 p2p->min_disc_int = 1; 2375 p2p->max_disc_int = 3; 2376 p2p->max_disc_tu = -1; 2377 2378 os_get_random(&p2p->next_tie_breaker, 1); 2379 p2p->next_tie_breaker &= 0x01; 2380 if (cfg->sd_request) 2381 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 2382 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE; 2383 if (cfg->concurrent_operations) 2384 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER; 2385 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 2386 2387 dl_list_init(&p2p->devices); 2388 2389 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 2390 p2p_expiration_timeout, p2p, NULL); 2391 2392 p2p->go_timeout = 100; 2393 p2p->client_timeout = 20; 2394 2395 p2p_dbg(p2p, "initialized"); 2396 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 2397 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 2398 2399 return p2p; 2400 } 2401 2402 2403 void p2p_deinit(struct p2p_data *p2p) 2404 { 2405 #ifdef CONFIG_WIFI_DISPLAY 2406 wpabuf_free(p2p->wfd_ie_beacon); 2407 wpabuf_free(p2p->wfd_ie_probe_req); 2408 wpabuf_free(p2p->wfd_ie_probe_resp); 2409 wpabuf_free(p2p->wfd_ie_assoc_req); 2410 wpabuf_free(p2p->wfd_ie_invitation); 2411 wpabuf_free(p2p->wfd_ie_prov_disc_req); 2412 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 2413 wpabuf_free(p2p->wfd_ie_go_neg); 2414 wpabuf_free(p2p->wfd_dev_info); 2415 wpabuf_free(p2p->wfd_assoc_bssid); 2416 wpabuf_free(p2p->wfd_coupled_sink_info); 2417 #endif /* CONFIG_WIFI_DISPLAY */ 2418 2419 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL); 2420 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 2421 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2422 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2423 p2p_flush(p2p); 2424 p2p_free_req_dev_types(p2p); 2425 os_free(p2p->cfg->dev_name); 2426 os_free(p2p->cfg->manufacturer); 2427 os_free(p2p->cfg->model_name); 2428 os_free(p2p->cfg->model_number); 2429 os_free(p2p->cfg->serial_number); 2430 os_free(p2p->cfg->pref_chan); 2431 os_free(p2p->groups); 2432 wpabuf_free(p2p->sd_resp); 2433 os_free(p2p->after_scan_tx); 2434 p2p_remove_wps_vendor_extensions(p2p); 2435 os_free(p2p->no_go_freq.range); 2436 os_free(p2p); 2437 } 2438 2439 2440 void p2p_flush(struct p2p_data *p2p) 2441 { 2442 struct p2p_device *dev, *prev; 2443 p2p_stop_find(p2p); 2444 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device, 2445 list) { 2446 dl_list_del(&dev->list); 2447 p2p_device_free(p2p, dev); 2448 } 2449 p2p_free_sd_queries(p2p); 2450 os_free(p2p->after_scan_tx); 2451 p2p->after_scan_tx = NULL; 2452 } 2453 2454 2455 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr) 2456 { 2457 struct p2p_device *dev; 2458 2459 dev = p2p_get_device(p2p, addr); 2460 if (dev == NULL) 2461 return -1; 2462 2463 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr)); 2464 2465 if (p2p->go_neg_peer == dev) 2466 p2p->go_neg_peer = NULL; 2467 2468 dev->wps_method = WPS_NOT_READY; 2469 dev->oob_pw_id = 0; 2470 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 2471 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 2472 2473 /* Check if after_scan_tx is for this peer. If so free it */ 2474 if (p2p->after_scan_tx && 2475 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) { 2476 os_free(p2p->after_scan_tx); 2477 p2p->after_scan_tx = NULL; 2478 } 2479 2480 return 0; 2481 } 2482 2483 2484 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name) 2485 { 2486 os_free(p2p->cfg->dev_name); 2487 if (dev_name) { 2488 p2p->cfg->dev_name = os_strdup(dev_name); 2489 if (p2p->cfg->dev_name == NULL) 2490 return -1; 2491 } else 2492 p2p->cfg->dev_name = NULL; 2493 return 0; 2494 } 2495 2496 2497 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer) 2498 { 2499 os_free(p2p->cfg->manufacturer); 2500 p2p->cfg->manufacturer = NULL; 2501 if (manufacturer) { 2502 p2p->cfg->manufacturer = os_strdup(manufacturer); 2503 if (p2p->cfg->manufacturer == NULL) 2504 return -1; 2505 } 2506 2507 return 0; 2508 } 2509 2510 2511 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name) 2512 { 2513 os_free(p2p->cfg->model_name); 2514 p2p->cfg->model_name = NULL; 2515 if (model_name) { 2516 p2p->cfg->model_name = os_strdup(model_name); 2517 if (p2p->cfg->model_name == NULL) 2518 return -1; 2519 } 2520 2521 return 0; 2522 } 2523 2524 2525 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number) 2526 { 2527 os_free(p2p->cfg->model_number); 2528 p2p->cfg->model_number = NULL; 2529 if (model_number) { 2530 p2p->cfg->model_number = os_strdup(model_number); 2531 if (p2p->cfg->model_number == NULL) 2532 return -1; 2533 } 2534 2535 return 0; 2536 } 2537 2538 2539 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number) 2540 { 2541 os_free(p2p->cfg->serial_number); 2542 p2p->cfg->serial_number = NULL; 2543 if (serial_number) { 2544 p2p->cfg->serial_number = os_strdup(serial_number); 2545 if (p2p->cfg->serial_number == NULL) 2546 return -1; 2547 } 2548 2549 return 0; 2550 } 2551 2552 2553 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods) 2554 { 2555 p2p->cfg->config_methods = config_methods; 2556 } 2557 2558 2559 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid) 2560 { 2561 os_memcpy(p2p->cfg->uuid, uuid, 16); 2562 } 2563 2564 2565 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type) 2566 { 2567 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8); 2568 return 0; 2569 } 2570 2571 2572 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8], 2573 size_t num_dev_types) 2574 { 2575 if (num_dev_types > P2P_SEC_DEVICE_TYPES) 2576 num_dev_types = P2P_SEC_DEVICE_TYPES; 2577 p2p->cfg->num_sec_dev_types = num_dev_types; 2578 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8); 2579 return 0; 2580 } 2581 2582 2583 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p) 2584 { 2585 int i; 2586 2587 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2588 wpabuf_free(p2p->wps_vendor_ext[i]); 2589 p2p->wps_vendor_ext[i] = NULL; 2590 } 2591 } 2592 2593 2594 int p2p_add_wps_vendor_extension(struct p2p_data *p2p, 2595 const struct wpabuf *vendor_ext) 2596 { 2597 int i; 2598 2599 if (vendor_ext == NULL) 2600 return -1; 2601 2602 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2603 if (p2p->wps_vendor_ext[i] == NULL) 2604 break; 2605 } 2606 if (i >= P2P_MAX_WPS_VENDOR_EXT) 2607 return -1; 2608 2609 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext); 2610 if (p2p->wps_vendor_ext[i] == NULL) 2611 return -1; 2612 2613 return 0; 2614 } 2615 2616 2617 int p2p_set_country(struct p2p_data *p2p, const char *country) 2618 { 2619 os_memcpy(p2p->cfg->country, country, 3); 2620 return 0; 2621 } 2622 2623 2624 void p2p_continue_find(struct p2p_data *p2p) 2625 { 2626 struct p2p_device *dev; 2627 p2p_set_state(p2p, P2P_SEARCH); 2628 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2629 if (dev->flags & P2P_DEV_SD_SCHEDULE) { 2630 if (p2p_start_sd(p2p, dev) == 0) 2631 return; 2632 else 2633 break; 2634 } else if (dev->req_config_methods && 2635 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) { 2636 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 2637 MACSTR " (config methods 0x%x)", 2638 MAC2STR(dev->info.p2p_device_addr), 2639 dev->req_config_methods); 2640 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0) 2641 return; 2642 } 2643 } 2644 2645 p2p_listen_in_find(p2p, 1); 2646 } 2647 2648 2649 static void p2p_sd_cb(struct p2p_data *p2p, int success) 2650 { 2651 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d", 2652 success); 2653 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2654 2655 if (!success) { 2656 if (p2p->sd_peer) { 2657 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE; 2658 p2p->sd_peer = NULL; 2659 } 2660 p2p_continue_find(p2p); 2661 return; 2662 } 2663 2664 if (p2p->sd_peer == NULL) { 2665 p2p_dbg(p2p, "No SD peer entry known"); 2666 p2p_continue_find(p2p); 2667 return; 2668 } 2669 2670 /* Wait for response from the peer */ 2671 p2p_set_state(p2p, P2P_SD_DURING_FIND); 2672 p2p_set_timeout(p2p, 0, 200000); 2673 } 2674 2675 2676 /** 2677 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state 2678 * @p2p: P2P module context from p2p_init() 2679 */ 2680 static void p2p_retry_pd(struct p2p_data *p2p) 2681 { 2682 struct p2p_device *dev; 2683 2684 if (p2p->state != P2P_IDLE) 2685 return; 2686 2687 /* 2688 * Retry the prov disc req attempt only for the peer that the user had 2689 * requested. 2690 */ 2691 2692 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2693 if (os_memcmp(p2p->pending_pd_devaddr, 2694 dev->info.p2p_device_addr, ETH_ALEN) != 0) 2695 continue; 2696 if (!dev->req_config_methods) 2697 continue; 2698 2699 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 2700 MACSTR " (config methods 0x%x)", 2701 MAC2STR(dev->info.p2p_device_addr), 2702 dev->req_config_methods); 2703 p2p_send_prov_disc_req(p2p, dev, 2704 dev->flags & P2P_DEV_PD_FOR_JOIN, 2705 p2p->pd_force_freq); 2706 return; 2707 } 2708 } 2709 2710 2711 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success) 2712 { 2713 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d", 2714 success); 2715 2716 /* 2717 * Postpone resetting the pending action state till after we actually 2718 * time out. This allows us to take some action like notifying any 2719 * interested parties about no response to the request. 2720 * 2721 * When the timer (below) goes off we check in IDLE, SEARCH, or 2722 * LISTEN_ONLY state, which are the only allowed states to issue a PD 2723 * requests in, if this was still pending and then raise notification. 2724 */ 2725 2726 if (!success) { 2727 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2728 2729 if (p2p->user_initiated_pd && 2730 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY)) 2731 { 2732 /* Retry request from timeout to avoid busy loops */ 2733 p2p->pending_action_state = P2P_PENDING_PD; 2734 p2p_set_timeout(p2p, 0, 50000); 2735 } else if (p2p->state != P2P_IDLE) 2736 p2p_continue_find(p2p); 2737 else if (p2p->user_initiated_pd) { 2738 p2p->pending_action_state = P2P_PENDING_PD; 2739 p2p_set_timeout(p2p, 0, 300000); 2740 } 2741 return; 2742 } 2743 2744 /* 2745 * This postponing, of resetting pending_action_state, needs to be 2746 * done only for user initiated PD requests and not internal ones. 2747 */ 2748 if (p2p->user_initiated_pd) 2749 p2p->pending_action_state = P2P_PENDING_PD; 2750 else 2751 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2752 2753 /* Wait for response from the peer */ 2754 if (p2p->state == P2P_SEARCH) 2755 p2p_set_state(p2p, P2P_PD_DURING_FIND); 2756 p2p_set_timeout(p2p, 0, 200000); 2757 } 2758 2759 2760 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq, 2761 struct os_reltime *rx_time, int level, const u8 *ies, 2762 size_t ies_len) 2763 { 2764 if (os_reltime_before(rx_time, &p2p->find_start)) { 2765 /* 2766 * The driver may have cached (e.g., in cfg80211 BSS table) the 2767 * scan results for relatively long time. To avoid reporting 2768 * stale information, update P2P peers only based on results 2769 * that have based on frames received after the last p2p_find 2770 * operation was started. 2771 */ 2772 p2p_dbg(p2p, "Ignore old scan result for " MACSTR 2773 " (rx_time=%u.%06u)", 2774 MAC2STR(bssid), (unsigned int) rx_time->sec, 2775 (unsigned int) rx_time->usec); 2776 return 0; 2777 } 2778 2779 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1); 2780 2781 return 0; 2782 } 2783 2784 2785 void p2p_scan_res_handled(struct p2p_data *p2p) 2786 { 2787 if (!p2p->p2p_scan_running) { 2788 p2p_dbg(p2p, "p2p_scan was not running, but scan results received"); 2789 } 2790 p2p->p2p_scan_running = 0; 2791 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2792 2793 if (p2p_run_after_scan(p2p)) 2794 return; 2795 if (p2p->state == P2P_SEARCH) 2796 p2p_continue_find(p2p); 2797 } 2798 2799 2800 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id) 2801 { 2802 u8 *len; 2803 2804 #ifdef CONFIG_WIFI_DISPLAY 2805 if (p2p->wfd_ie_probe_req) 2806 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req); 2807 #endif /* CONFIG_WIFI_DISPLAY */ 2808 2809 len = p2p_buf_add_ie_hdr(ies); 2810 p2p_buf_add_capability(ies, p2p->dev_capab & 2811 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2812 if (dev_id) 2813 p2p_buf_add_device_id(ies, dev_id); 2814 if (p2p->cfg->reg_class && p2p->cfg->channel) 2815 p2p_buf_add_listen_channel(ies, p2p->cfg->country, 2816 p2p->cfg->reg_class, 2817 p2p->cfg->channel); 2818 if (p2p->ext_listen_interval) 2819 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period, 2820 p2p->ext_listen_interval); 2821 /* TODO: p2p_buf_add_operating_channel() if GO */ 2822 p2p_buf_update_ie_hdr(ies, len); 2823 } 2824 2825 2826 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p) 2827 { 2828 size_t len = 100; 2829 2830 #ifdef CONFIG_WIFI_DISPLAY 2831 if (p2p && p2p->wfd_ie_probe_req) 2832 len += wpabuf_len(p2p->wfd_ie_probe_req); 2833 #endif /* CONFIG_WIFI_DISPLAY */ 2834 2835 return len; 2836 } 2837 2838 2839 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end) 2840 { 2841 return p2p_attr_text(p2p_ie, buf, end); 2842 } 2843 2844 2845 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success) 2846 { 2847 struct p2p_device *dev = p2p->go_neg_peer; 2848 int timeout; 2849 2850 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success); 2851 2852 if (dev == NULL) { 2853 p2p_dbg(p2p, "No pending GO Negotiation"); 2854 return; 2855 } 2856 2857 if (success) { 2858 if (dev->flags & P2P_DEV_USER_REJECTED) { 2859 p2p_set_state(p2p, P2P_IDLE); 2860 return; 2861 } 2862 } else if (dev->go_neg_req_sent) { 2863 /* Cancel the increment from p2p_connect_send() on failure */ 2864 dev->go_neg_req_sent--; 2865 } 2866 2867 if (!success && 2868 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) && 2869 !is_zero_ether_addr(dev->member_in_go_dev)) { 2870 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO", 2871 MAC2STR(dev->info.p2p_device_addr)); 2872 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 2873 p2p_send_dev_disc_req(p2p, dev); 2874 return; 2875 } 2876 2877 /* 2878 * Use P2P find, if needed, to find the other device from its listen 2879 * channel. 2880 */ 2881 p2p_set_state(p2p, P2P_CONNECT); 2882 timeout = success ? 500000 : 100000; 2883 if (!success && p2p->go_neg_peer && 2884 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) { 2885 unsigned int r; 2886 /* 2887 * Peer is expected to wait our response and we will skip the 2888 * listen phase. Add some randomness to the wait time here to 2889 * make it less likely to hit cases where we could end up in 2890 * sync with peer not listening. 2891 */ 2892 os_get_random((u8 *) &r, sizeof(r)); 2893 timeout += r % 100000; 2894 } 2895 p2p_set_timeout(p2p, 0, timeout); 2896 } 2897 2898 2899 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success) 2900 { 2901 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d", 2902 success); 2903 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) { 2904 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore"); 2905 return; 2906 } 2907 p2p_set_state(p2p, P2P_CONNECT); 2908 p2p_set_timeout(p2p, 0, 500000); 2909 } 2910 2911 2912 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success, 2913 const u8 *addr) 2914 { 2915 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success); 2916 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) { 2917 p2p_go_neg_failed(p2p, p2p->go_neg_peer, 2918 p2p->go_neg_peer->status); 2919 } else if (success) { 2920 struct p2p_device *dev; 2921 dev = p2p_get_device(p2p, addr); 2922 if (dev && 2923 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) 2924 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE; 2925 } 2926 } 2927 2928 2929 static void p2p_go_neg_conf_cb(struct p2p_data *p2p, 2930 enum p2p_send_action_result result) 2931 { 2932 struct p2p_device *dev; 2933 2934 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result); 2935 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 2936 if (result == P2P_SEND_ACTION_FAILED) { 2937 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 2938 return; 2939 } 2940 if (result == P2P_SEND_ACTION_NO_ACK) { 2941 /* 2942 * It looks like the TX status for GO Negotiation Confirm is 2943 * often showing failure even when the peer has actually 2944 * received the frame. Since the peer may change channels 2945 * immediately after having received the frame, we may not see 2946 * an Ack for retries, so just dropping a single frame may 2947 * trigger this. To allow the group formation to succeed if the 2948 * peer did indeed receive the frame, continue regardless of 2949 * the TX status. 2950 */ 2951 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported"); 2952 } 2953 2954 dev = p2p->go_neg_peer; 2955 if (dev == NULL) 2956 return; 2957 2958 p2p_go_complete(p2p, dev); 2959 } 2960 2961 2962 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 2963 const u8 *src, const u8 *bssid, 2964 enum p2p_send_action_result result) 2965 { 2966 enum p2p_pending_action_state state; 2967 int success; 2968 2969 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR 2970 " src=" MACSTR " bssid=" MACSTR " result=%d", 2971 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), 2972 MAC2STR(bssid), result); 2973 success = result == P2P_SEND_ACTION_SUCCESS; 2974 state = p2p->pending_action_state; 2975 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2976 switch (state) { 2977 case P2P_NO_PENDING_ACTION: 2978 if (p2p->after_scan_tx_in_progress) { 2979 p2p->after_scan_tx_in_progress = 0; 2980 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING && 2981 p2p_run_after_scan(p2p)) 2982 break; 2983 if (p2p->state == P2P_SEARCH) { 2984 p2p_dbg(p2p, "Continue find after after_scan_tx completion"); 2985 p2p_continue_find(p2p); 2986 } 2987 } 2988 break; 2989 case P2P_PENDING_GO_NEG_REQUEST: 2990 p2p_go_neg_req_cb(p2p, success); 2991 break; 2992 case P2P_PENDING_GO_NEG_RESPONSE: 2993 p2p_go_neg_resp_cb(p2p, success); 2994 break; 2995 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE: 2996 p2p_go_neg_resp_failure_cb(p2p, success, dst); 2997 break; 2998 case P2P_PENDING_GO_NEG_CONFIRM: 2999 p2p_go_neg_conf_cb(p2p, result); 3000 break; 3001 case P2P_PENDING_SD: 3002 p2p_sd_cb(p2p, success); 3003 break; 3004 case P2P_PENDING_PD: 3005 p2p_prov_disc_cb(p2p, success); 3006 break; 3007 case P2P_PENDING_INVITATION_REQUEST: 3008 p2p_invitation_req_cb(p2p, success); 3009 break; 3010 case P2P_PENDING_INVITATION_RESPONSE: 3011 p2p_invitation_resp_cb(p2p, success); 3012 break; 3013 case P2P_PENDING_DEV_DISC_REQUEST: 3014 p2p_dev_disc_req_cb(p2p, success); 3015 break; 3016 case P2P_PENDING_DEV_DISC_RESPONSE: 3017 p2p_dev_disc_resp_cb(p2p, success); 3018 break; 3019 case P2P_PENDING_GO_DISC_REQ: 3020 p2p_go_disc_req_cb(p2p, success); 3021 break; 3022 } 3023 3024 p2p->after_scan_tx_in_progress = 0; 3025 } 3026 3027 3028 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq, 3029 unsigned int duration) 3030 { 3031 if (freq == p2p->pending_client_disc_freq) { 3032 p2p_dbg(p2p, "Client discoverability remain-awake completed"); 3033 p2p->pending_client_disc_freq = 0; 3034 return; 3035 } 3036 3037 if (freq != p2p->pending_listen_freq) { 3038 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)", 3039 freq, duration, p2p->pending_listen_freq); 3040 return; 3041 } 3042 3043 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback", 3044 p2p->pending_listen_sec, p2p->pending_listen_usec, 3045 p2p->pending_listen_freq); 3046 p2p->in_listen = 1; 3047 p2p->drv_in_listen = freq; 3048 if (p2p->pending_listen_sec || p2p->pending_listen_usec) { 3049 /* 3050 * Add 20 msec extra wait to avoid race condition with driver 3051 * remain-on-channel end event, i.e., give driver more time to 3052 * complete the operation before our timeout expires. 3053 */ 3054 p2p_set_timeout(p2p, p2p->pending_listen_sec, 3055 p2p->pending_listen_usec + 20000); 3056 } 3057 3058 p2p->pending_listen_freq = 0; 3059 } 3060 3061 3062 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq) 3063 { 3064 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq); 3065 p2p->drv_in_listen = 0; 3066 if (p2p->in_listen) 3067 return 0; /* Internal timeout will trigger the next step */ 3068 3069 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) { 3070 if (p2p->go_neg_peer->connect_reqs >= 120) { 3071 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3072 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3073 return 0; 3074 } 3075 3076 p2p_set_state(p2p, P2P_CONNECT); 3077 p2p_connect_send(p2p, p2p->go_neg_peer); 3078 return 1; 3079 } else if (p2p->state == P2P_SEARCH) { 3080 if (p2p->p2p_scan_running) { 3081 /* 3082 * Search is already in progress. This can happen if 3083 * an Action frame RX is reported immediately after 3084 * the end of a remain-on-channel operation and the 3085 * response frame to that is sent using an offchannel 3086 * operation while in p2p_find. Avoid an attempt to 3087 * restart a scan here. 3088 */ 3089 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one"); 3090 return 1; 3091 } 3092 if (p2p->pending_listen_freq) { 3093 /* 3094 * Better wait a bit if the driver is unable to start 3095 * offchannel operation for some reason. p2p_search() 3096 * will be started from internal timeout. 3097 */ 3098 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop"); 3099 p2p_set_timeout(p2p, 0, 100000); 3100 return 1; 3101 } 3102 if (p2p->search_delay) { 3103 p2p_dbg(p2p, "Delay search operation by %u ms", 3104 p2p->search_delay); 3105 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3106 (p2p->search_delay % 1000) * 1000); 3107 return 1; 3108 } 3109 p2p_search(p2p); 3110 return 1; 3111 } 3112 3113 return 0; 3114 } 3115 3116 3117 static void p2p_timeout_connect(struct p2p_data *p2p) 3118 { 3119 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3120 if (p2p->go_neg_peer && 3121 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 3122 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed"); 3123 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3124 return; 3125 } 3126 if (p2p->go_neg_peer && 3127 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) && 3128 p2p->go_neg_peer->connect_reqs < 120) { 3129 p2p_dbg(p2p, "Peer expected to wait our response - skip listen"); 3130 p2p_connect_send(p2p, p2p->go_neg_peer); 3131 return; 3132 } 3133 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) { 3134 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)"); 3135 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3136 p2p_set_timeout(p2p, 0, 30000); 3137 return; 3138 } 3139 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3140 p2p_listen_in_find(p2p, 0); 3141 } 3142 3143 3144 static void p2p_timeout_connect_listen(struct p2p_data *p2p) 3145 { 3146 if (p2p->go_neg_peer) { 3147 if (p2p->drv_in_listen) { 3148 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete"); 3149 return; 3150 } 3151 3152 if (p2p->go_neg_peer->connect_reqs >= 120) { 3153 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3154 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3155 return; 3156 } 3157 3158 p2p_set_state(p2p, P2P_CONNECT); 3159 p2p_connect_send(p2p, p2p->go_neg_peer); 3160 } else 3161 p2p_set_state(p2p, P2P_IDLE); 3162 } 3163 3164 3165 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p) 3166 { 3167 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 3168 3169 if (p2p->cfg->is_concurrent_session_active && 3170 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx)) 3171 p2p_set_timeout(p2p, 0, 500000); 3172 else 3173 p2p_set_timeout(p2p, 0, 200000); 3174 } 3175 3176 3177 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p) 3178 { 3179 struct p2p_device *dev = p2p->go_neg_peer; 3180 3181 if (dev == NULL) { 3182 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait"); 3183 return; 3184 } 3185 3186 dev->wait_count++; 3187 if (dev->wait_count >= 120) { 3188 p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation"); 3189 p2p_go_neg_failed(p2p, dev, -1); 3190 return; 3191 } 3192 3193 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation"); 3194 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT); 3195 p2p_listen_in_find(p2p, 0); 3196 } 3197 3198 3199 static void p2p_timeout_sd_during_find(struct p2p_data *p2p) 3200 { 3201 p2p_dbg(p2p, "Service Discovery Query timeout"); 3202 if (p2p->sd_peer) { 3203 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3204 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE; 3205 p2p->sd_peer = NULL; 3206 } 3207 p2p_continue_find(p2p); 3208 } 3209 3210 3211 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p) 3212 { 3213 p2p_dbg(p2p, "Provision Discovery Request timeout"); 3214 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3215 p2p_continue_find(p2p); 3216 } 3217 3218 3219 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p) 3220 { 3221 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3222 3223 /* 3224 * For user initiated PD requests that we have not gotten any responses 3225 * for while in IDLE state, we retry them a couple of times before 3226 * giving up. 3227 */ 3228 if (!p2p->user_initiated_pd) 3229 return; 3230 3231 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout"); 3232 3233 if (p2p->pd_retries) { 3234 p2p->pd_retries--; 3235 p2p_retry_pd(p2p); 3236 } else { 3237 struct p2p_device *dev; 3238 int for_join = 0; 3239 3240 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3241 if (os_memcmp(p2p->pending_pd_devaddr, 3242 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3243 continue; 3244 if (dev->req_config_methods && 3245 (dev->flags & P2P_DEV_PD_FOR_JOIN)) 3246 for_join = 1; 3247 } 3248 3249 if (p2p->cfg->prov_disc_fail) 3250 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, 3251 p2p->pending_pd_devaddr, 3252 for_join ? 3253 P2P_PROV_DISC_TIMEOUT_JOIN : 3254 P2P_PROV_DISC_TIMEOUT); 3255 p2p_reset_pending_pd(p2p); 3256 } 3257 } 3258 3259 3260 static void p2p_timeout_invite(struct p2p_data *p2p) 3261 { 3262 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3263 p2p_set_state(p2p, P2P_INVITE_LISTEN); 3264 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 3265 /* 3266 * Better remain on operating channel instead of listen channel 3267 * when running a group. 3268 */ 3269 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel"); 3270 p2p_set_timeout(p2p, 0, 100000); 3271 return; 3272 } 3273 p2p_listen_in_find(p2p, 0); 3274 } 3275 3276 3277 static void p2p_timeout_invite_listen(struct p2p_data *p2p) 3278 { 3279 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) { 3280 p2p_set_state(p2p, P2P_INVITE); 3281 p2p_invite_send(p2p, p2p->invite_peer, 3282 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id); 3283 } else { 3284 if (p2p->invite_peer) { 3285 p2p_dbg(p2p, "Invitation Request retry limit reached"); 3286 if (p2p->cfg->invitation_result) 3287 p2p->cfg->invitation_result( 3288 p2p->cfg->cb_ctx, -1, NULL, NULL, 3289 p2p->invite_peer->info.p2p_device_addr, 3290 0); 3291 } 3292 p2p_set_state(p2p, P2P_IDLE); 3293 } 3294 } 3295 3296 3297 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx) 3298 { 3299 struct p2p_data *p2p = eloop_ctx; 3300 3301 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state)); 3302 3303 p2p->in_listen = 0; 3304 3305 switch (p2p->state) { 3306 case P2P_IDLE: 3307 /* Check if we timed out waiting for PD req */ 3308 if (p2p->pending_action_state == P2P_PENDING_PD) 3309 p2p_timeout_prov_disc_req(p2p); 3310 break; 3311 case P2P_SEARCH: 3312 /* Check if we timed out waiting for PD req */ 3313 if (p2p->pending_action_state == P2P_PENDING_PD) 3314 p2p_timeout_prov_disc_req(p2p); 3315 if (p2p->search_delay && !p2p->in_search_delay) { 3316 p2p_dbg(p2p, "Delay search operation by %u ms", 3317 p2p->search_delay); 3318 p2p->in_search_delay = 1; 3319 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3320 (p2p->search_delay % 1000) * 1000); 3321 break; 3322 } 3323 p2p->in_search_delay = 0; 3324 p2p_search(p2p); 3325 break; 3326 case P2P_CONNECT: 3327 p2p_timeout_connect(p2p); 3328 break; 3329 case P2P_CONNECT_LISTEN: 3330 p2p_timeout_connect_listen(p2p); 3331 break; 3332 case P2P_GO_NEG: 3333 break; 3334 case P2P_LISTEN_ONLY: 3335 /* Check if we timed out waiting for PD req */ 3336 if (p2p->pending_action_state == P2P_PENDING_PD) 3337 p2p_timeout_prov_disc_req(p2p); 3338 3339 if (p2p->ext_listen_only) { 3340 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed"); 3341 p2p->ext_listen_only = 0; 3342 p2p_set_state(p2p, P2P_IDLE); 3343 } 3344 break; 3345 case P2P_WAIT_PEER_CONNECT: 3346 p2p_timeout_wait_peer_connect(p2p); 3347 break; 3348 case P2P_WAIT_PEER_IDLE: 3349 p2p_timeout_wait_peer_idle(p2p); 3350 break; 3351 case P2P_SD_DURING_FIND: 3352 p2p_timeout_sd_during_find(p2p); 3353 break; 3354 case P2P_PROVISIONING: 3355 break; 3356 case P2P_PD_DURING_FIND: 3357 p2p_timeout_prov_disc_during_find(p2p); 3358 break; 3359 case P2P_INVITE: 3360 p2p_timeout_invite(p2p); 3361 break; 3362 case P2P_INVITE_LISTEN: 3363 p2p_timeout_invite_listen(p2p); 3364 break; 3365 } 3366 } 3367 3368 3369 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr) 3370 { 3371 struct p2p_device *dev; 3372 3373 dev = p2p_get_device(p2p, peer_addr); 3374 p2p_dbg(p2p, "Local request to reject connection attempts by peer " 3375 MACSTR, MAC2STR(peer_addr)); 3376 if (dev == NULL) { 3377 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr)); 3378 return -1; 3379 } 3380 dev->status = P2P_SC_FAIL_REJECTED_BY_USER; 3381 dev->flags |= P2P_DEV_USER_REJECTED; 3382 return 0; 3383 } 3384 3385 3386 const char * p2p_wps_method_text(enum p2p_wps_method method) 3387 { 3388 switch (method) { 3389 case WPS_NOT_READY: 3390 return "not-ready"; 3391 case WPS_PIN_DISPLAY: 3392 return "Display"; 3393 case WPS_PIN_KEYPAD: 3394 return "Keypad"; 3395 case WPS_PBC: 3396 return "PBC"; 3397 case WPS_NFC: 3398 return "NFC"; 3399 } 3400 3401 return "??"; 3402 } 3403 3404 3405 static const char * p2p_go_state_text(enum p2p_go_state go_state) 3406 { 3407 switch (go_state) { 3408 case UNKNOWN_GO: 3409 return "unknown"; 3410 case LOCAL_GO: 3411 return "local"; 3412 case REMOTE_GO: 3413 return "remote"; 3414 } 3415 3416 return "??"; 3417 } 3418 3419 3420 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p, 3421 const u8 *addr, int next) 3422 { 3423 struct p2p_device *dev; 3424 3425 if (addr) 3426 dev = p2p_get_device(p2p, addr); 3427 else 3428 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 3429 3430 if (dev && next) { 3431 dev = dl_list_first(&dev->list, struct p2p_device, list); 3432 if (&dev->list == &p2p->devices) 3433 dev = NULL; 3434 } 3435 3436 if (dev == NULL) 3437 return NULL; 3438 3439 return &dev->info; 3440 } 3441 3442 3443 int p2p_get_peer_info_txt(const struct p2p_peer_info *info, 3444 char *buf, size_t buflen) 3445 { 3446 struct p2p_device *dev; 3447 int res; 3448 char *pos, *end; 3449 struct os_reltime now; 3450 3451 if (info == NULL) 3452 return -1; 3453 3454 dev = (struct p2p_device *) (((u8 *) info) - 3455 offsetof(struct p2p_device, info)); 3456 3457 pos = buf; 3458 end = buf + buflen; 3459 3460 os_get_reltime(&now); 3461 res = os_snprintf(pos, end - pos, 3462 "age=%d\n" 3463 "listen_freq=%d\n" 3464 "wps_method=%s\n" 3465 "interface_addr=" MACSTR "\n" 3466 "member_in_go_dev=" MACSTR "\n" 3467 "member_in_go_iface=" MACSTR "\n" 3468 "go_neg_req_sent=%d\n" 3469 "go_state=%s\n" 3470 "dialog_token=%u\n" 3471 "intended_addr=" MACSTR "\n" 3472 "country=%c%c\n" 3473 "oper_freq=%d\n" 3474 "req_config_methods=0x%x\n" 3475 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n" 3476 "status=%d\n" 3477 "wait_count=%u\n" 3478 "invitation_reqs=%u\n", 3479 (int) (now.sec - dev->last_seen.sec), 3480 dev->listen_freq, 3481 p2p_wps_method_text(dev->wps_method), 3482 MAC2STR(dev->interface_addr), 3483 MAC2STR(dev->member_in_go_dev), 3484 MAC2STR(dev->member_in_go_iface), 3485 dev->go_neg_req_sent, 3486 p2p_go_state_text(dev->go_state), 3487 dev->dialog_token, 3488 MAC2STR(dev->intended_addr), 3489 dev->country[0] ? dev->country[0] : '_', 3490 dev->country[1] ? dev->country[1] : '_', 3491 dev->oper_freq, 3492 dev->req_config_methods, 3493 dev->flags & P2P_DEV_PROBE_REQ_ONLY ? 3494 "[PROBE_REQ_ONLY]" : "", 3495 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "", 3496 dev->flags & P2P_DEV_NOT_YET_READY ? 3497 "[NOT_YET_READY]" : "", 3498 dev->flags & P2P_DEV_SD_INFO ? "[SD_INFO]" : "", 3499 dev->flags & P2P_DEV_SD_SCHEDULE ? "[SD_SCHEDULE]" : 3500 "", 3501 dev->flags & P2P_DEV_PD_PEER_DISPLAY ? 3502 "[PD_PEER_DISPLAY]" : "", 3503 dev->flags & P2P_DEV_PD_PEER_KEYPAD ? 3504 "[PD_PEER_KEYPAD]" : "", 3505 dev->flags & P2P_DEV_USER_REJECTED ? 3506 "[USER_REJECTED]" : "", 3507 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ? 3508 "[PEER_WAITING_RESPONSE]" : "", 3509 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ? 3510 "[PREFER_PERSISTENT_GROUP]" : "", 3511 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ? 3512 "[WAIT_GO_NEG_RESPONSE]" : "", 3513 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ? 3514 "[WAIT_GO_NEG_CONFIRM]" : "", 3515 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ? 3516 "[GROUP_CLIENT_ONLY]" : "", 3517 dev->flags & P2P_DEV_FORCE_FREQ ? 3518 "[FORCE_FREQ]" : "", 3519 dev->flags & P2P_DEV_PD_FOR_JOIN ? 3520 "[PD_FOR_JOIN]" : "", 3521 dev->status, 3522 dev->wait_count, 3523 dev->invitation_reqs); 3524 if (res < 0 || res >= end - pos) 3525 return pos - buf; 3526 pos += res; 3527 3528 if (dev->ext_listen_period) { 3529 res = os_snprintf(pos, end - pos, 3530 "ext_listen_period=%u\n" 3531 "ext_listen_interval=%u\n", 3532 dev->ext_listen_period, 3533 dev->ext_listen_interval); 3534 if (res < 0 || res >= end - pos) 3535 return pos - buf; 3536 pos += res; 3537 } 3538 3539 if (dev->oper_ssid_len) { 3540 res = os_snprintf(pos, end - pos, 3541 "oper_ssid=%s\n", 3542 wpa_ssid_txt(dev->oper_ssid, 3543 dev->oper_ssid_len)); 3544 if (res < 0 || res >= end - pos) 3545 return pos - buf; 3546 pos += res; 3547 } 3548 3549 #ifdef CONFIG_WIFI_DISPLAY 3550 if (dev->info.wfd_subelems) { 3551 res = os_snprintf(pos, end - pos, "wfd_subelems="); 3552 if (res < 0 || res >= end - pos) 3553 return pos - buf; 3554 pos += res; 3555 3556 pos += wpa_snprintf_hex(pos, end - pos, 3557 wpabuf_head(dev->info.wfd_subelems), 3558 wpabuf_len(dev->info.wfd_subelems)); 3559 3560 res = os_snprintf(pos, end - pos, "\n"); 3561 if (res < 0 || res >= end - pos) 3562 return pos - buf; 3563 pos += res; 3564 } 3565 #endif /* CONFIG_WIFI_DISPLAY */ 3566 3567 return pos - buf; 3568 } 3569 3570 3571 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr) 3572 { 3573 return p2p_get_device(p2p, addr) != NULL; 3574 } 3575 3576 3577 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled) 3578 { 3579 if (enabled) { 3580 p2p_dbg(p2p, "Client discoverability enabled"); 3581 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3582 } else { 3583 p2p_dbg(p2p, "Client discoverability disabled"); 3584 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3585 } 3586 } 3587 3588 3589 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1, 3590 u32 duration2, u32 interval2) 3591 { 3592 struct wpabuf *req; 3593 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL; 3594 u8 *len; 3595 3596 req = wpabuf_alloc(100); 3597 if (req == NULL) 3598 return NULL; 3599 3600 if (duration1 || interval1) { 3601 os_memset(&desc1, 0, sizeof(desc1)); 3602 desc1.count_type = 1; 3603 desc1.duration = duration1; 3604 desc1.interval = interval1; 3605 ptr1 = &desc1; 3606 3607 if (duration2 || interval2) { 3608 os_memset(&desc2, 0, sizeof(desc2)); 3609 desc2.count_type = 2; 3610 desc2.duration = duration2; 3611 desc2.interval = interval2; 3612 ptr2 = &desc2; 3613 } 3614 } 3615 3616 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1); 3617 len = p2p_buf_add_ie_hdr(req); 3618 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2); 3619 p2p_buf_update_ie_hdr(req, len); 3620 3621 return req; 3622 } 3623 3624 3625 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr, 3626 const u8 *own_interface_addr, unsigned int freq, 3627 u32 duration1, u32 interval1, u32 duration2, 3628 u32 interval2) 3629 { 3630 struct wpabuf *req; 3631 3632 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR 3633 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u " 3634 "dur2=%u int2=%u", 3635 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr), 3636 freq, duration1, interval1, duration2, interval2); 3637 3638 req = p2p_build_presence_req(duration1, interval1, duration2, 3639 interval2); 3640 if (req == NULL) 3641 return -1; 3642 3643 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3644 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr, 3645 go_interface_addr, 3646 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 3647 p2p_dbg(p2p, "Failed to send Action frame"); 3648 } 3649 wpabuf_free(req); 3650 3651 return 0; 3652 } 3653 3654 3655 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa, 3656 size_t noa_len, u8 dialog_token) 3657 { 3658 struct wpabuf *resp; 3659 u8 *len; 3660 3661 resp = wpabuf_alloc(100 + noa_len); 3662 if (resp == NULL) 3663 return NULL; 3664 3665 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token); 3666 len = p2p_buf_add_ie_hdr(resp); 3667 p2p_buf_add_status(resp, status); 3668 if (noa) { 3669 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE); 3670 wpabuf_put_le16(resp, noa_len); 3671 wpabuf_put_data(resp, noa, noa_len); 3672 } else 3673 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL); 3674 p2p_buf_update_ie_hdr(resp, len); 3675 3676 return resp; 3677 } 3678 3679 3680 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 3681 const u8 *sa, const u8 *data, size_t len, 3682 int rx_freq) 3683 { 3684 struct p2p_message msg; 3685 u8 status; 3686 struct wpabuf *resp; 3687 size_t g; 3688 struct p2p_group *group = NULL; 3689 int parsed = 0; 3690 u8 noa[50]; 3691 int noa_len; 3692 3693 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request"); 3694 3695 for (g = 0; g < p2p->num_groups; g++) { 3696 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]), 3697 ETH_ALEN) == 0) { 3698 group = p2p->groups[g]; 3699 break; 3700 } 3701 } 3702 if (group == NULL) { 3703 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group " 3704 MACSTR, MAC2STR(da)); 3705 return; 3706 } 3707 3708 if (p2p_parse(data, len, &msg) < 0) { 3709 p2p_dbg(p2p, "Failed to parse P2P Presence Request"); 3710 status = P2P_SC_FAIL_INVALID_PARAMS; 3711 goto fail; 3712 } 3713 parsed = 1; 3714 3715 if (msg.noa == NULL) { 3716 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request"); 3717 status = P2P_SC_FAIL_INVALID_PARAMS; 3718 goto fail; 3719 } 3720 3721 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len); 3722 3723 fail: 3724 if (p2p->cfg->get_noa) 3725 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa, 3726 sizeof(noa)); 3727 else 3728 noa_len = -1; 3729 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL, 3730 noa_len > 0 ? noa_len : 0, 3731 msg.dialog_token); 3732 if (parsed) 3733 p2p_parse_free(&msg); 3734 if (resp == NULL) 3735 return; 3736 3737 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3738 if (p2p_send_action(p2p, rx_freq, sa, da, da, 3739 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 3740 p2p_dbg(p2p, "Failed to send Action frame"); 3741 } 3742 wpabuf_free(resp); 3743 } 3744 3745 3746 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 3747 const u8 *sa, const u8 *data, size_t len) 3748 { 3749 struct p2p_message msg; 3750 3751 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response"); 3752 3753 if (p2p_parse(data, len, &msg) < 0) { 3754 p2p_dbg(p2p, "Failed to parse P2P Presence Response"); 3755 return; 3756 } 3757 3758 if (msg.status == NULL || msg.noa == NULL) { 3759 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response"); 3760 p2p_parse_free(&msg); 3761 return; 3762 } 3763 3764 if (p2p->cfg->presence_resp) { 3765 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status, 3766 msg.noa, msg.noa_len); 3767 } 3768 3769 if (*msg.status) { 3770 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u", 3771 *msg.status); 3772 p2p_parse_free(&msg); 3773 return; 3774 } 3775 3776 p2p_dbg(p2p, "P2P Presence Request was accepted"); 3777 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA", 3778 msg.noa, msg.noa_len); 3779 /* TODO: process NoA */ 3780 p2p_parse_free(&msg); 3781 } 3782 3783 3784 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx) 3785 { 3786 struct p2p_data *p2p = eloop_ctx; 3787 3788 if (p2p->ext_listen_interval) { 3789 /* Schedule next extended listen timeout */ 3790 eloop_register_timeout(p2p->ext_listen_interval_sec, 3791 p2p->ext_listen_interval_usec, 3792 p2p_ext_listen_timeout, p2p, NULL); 3793 } 3794 3795 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) { 3796 /* 3797 * This should not really happen, but it looks like the Listen 3798 * command may fail is something else (e.g., a scan) was 3799 * running at an inconvenient time. As a workaround, allow new 3800 * Extended Listen operation to be started. 3801 */ 3802 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again"); 3803 p2p->ext_listen_only = 0; 3804 p2p_set_state(p2p, P2P_IDLE); 3805 } 3806 3807 if (p2p->state != P2P_IDLE) { 3808 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state)); 3809 return; 3810 } 3811 3812 p2p_dbg(p2p, "Extended Listen timeout"); 3813 p2p->ext_listen_only = 1; 3814 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) { 3815 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing"); 3816 p2p->ext_listen_only = 0; 3817 } 3818 } 3819 3820 3821 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period, 3822 unsigned int interval) 3823 { 3824 if (period > 65535 || interval > 65535 || period > interval || 3825 (period == 0 && interval > 0) || (period > 0 && interval == 0)) { 3826 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u", 3827 period, interval); 3828 return -1; 3829 } 3830 3831 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 3832 3833 if (interval == 0) { 3834 p2p_dbg(p2p, "Disabling Extended Listen Timing"); 3835 p2p->ext_listen_period = 0; 3836 p2p->ext_listen_interval = 0; 3837 return 0; 3838 } 3839 3840 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec", 3841 period, interval); 3842 p2p->ext_listen_period = period; 3843 p2p->ext_listen_interval = interval; 3844 p2p->ext_listen_interval_sec = interval / 1000; 3845 p2p->ext_listen_interval_usec = (interval % 1000) * 1000; 3846 3847 eloop_register_timeout(p2p->ext_listen_interval_sec, 3848 p2p->ext_listen_interval_usec, 3849 p2p_ext_listen_timeout, p2p, NULL); 3850 3851 return 0; 3852 } 3853 3854 3855 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 3856 const u8 *ie, size_t ie_len) 3857 { 3858 struct p2p_message msg; 3859 3860 if (bssid == NULL || ie == NULL) 3861 return; 3862 3863 os_memset(&msg, 0, sizeof(msg)); 3864 if (p2p_parse_ies(ie, ie_len, &msg)) 3865 return; 3866 if (msg.minor_reason_code == NULL) { 3867 p2p_parse_free(&msg); 3868 return; 3869 } 3870 3871 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR 3872 " reason_code=%u minor_reason_code=%u", 3873 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 3874 3875 p2p_parse_free(&msg); 3876 } 3877 3878 3879 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 3880 const u8 *ie, size_t ie_len) 3881 { 3882 struct p2p_message msg; 3883 3884 if (bssid == NULL || ie == NULL) 3885 return; 3886 3887 os_memset(&msg, 0, sizeof(msg)); 3888 if (p2p_parse_ies(ie, ie_len, &msg)) 3889 return; 3890 if (msg.minor_reason_code == NULL) { 3891 p2p_parse_free(&msg); 3892 return; 3893 } 3894 3895 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR 3896 " reason_code=%u minor_reason_code=%u", 3897 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 3898 3899 p2p_parse_free(&msg); 3900 } 3901 3902 3903 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled) 3904 { 3905 if (enabled) { 3906 p2p_dbg(p2p, "Managed P2P Device operations enabled"); 3907 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED; 3908 } else { 3909 p2p_dbg(p2p, "Managed P2P Device operations disabled"); 3910 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED; 3911 } 3912 } 3913 3914 3915 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel) 3916 { 3917 if (p2p_channel_to_freq(reg_class, channel) < 0) 3918 return -1; 3919 3920 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u", 3921 reg_class, channel); 3922 p2p->cfg->reg_class = reg_class; 3923 p2p->cfg->channel = channel; 3924 3925 return 0; 3926 } 3927 3928 3929 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len) 3930 { 3931 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len)); 3932 if (postfix == NULL) { 3933 p2p->cfg->ssid_postfix_len = 0; 3934 return 0; 3935 } 3936 if (len > sizeof(p2p->cfg->ssid_postfix)) 3937 return -1; 3938 os_memcpy(p2p->cfg->ssid_postfix, postfix, len); 3939 p2p->cfg->ssid_postfix_len = len; 3940 return 0; 3941 } 3942 3943 3944 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel, 3945 int cfg_op_channel) 3946 { 3947 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0) 3948 return -1; 3949 3950 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u", 3951 op_reg_class, op_channel); 3952 p2p->cfg->op_reg_class = op_reg_class; 3953 p2p->cfg->op_channel = op_channel; 3954 p2p->cfg->cfg_op_channel = cfg_op_channel; 3955 return 0; 3956 } 3957 3958 3959 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan, 3960 const struct p2p_channel *pref_chan) 3961 { 3962 struct p2p_channel *n; 3963 3964 if (pref_chan) { 3965 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel)); 3966 if (n == NULL) 3967 return -1; 3968 os_memcpy(n, pref_chan, 3969 num_pref_chan * sizeof(struct p2p_channel)); 3970 } else 3971 n = NULL; 3972 3973 os_free(p2p->cfg->pref_chan); 3974 p2p->cfg->pref_chan = n; 3975 p2p->cfg->num_pref_chan = num_pref_chan; 3976 3977 return 0; 3978 } 3979 3980 3981 int p2p_set_no_go_freq(struct p2p_data *p2p, 3982 const struct wpa_freq_range_list *list) 3983 { 3984 struct wpa_freq_range *tmp; 3985 3986 if (list == NULL || list->num == 0) { 3987 os_free(p2p->no_go_freq.range); 3988 p2p->no_go_freq.range = NULL; 3989 p2p->no_go_freq.num = 0; 3990 return 0; 3991 } 3992 3993 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range)); 3994 if (tmp == NULL) 3995 return -1; 3996 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range)); 3997 os_free(p2p->no_go_freq.range); 3998 p2p->no_go_freq.range = tmp; 3999 p2p->no_go_freq.num = list->num; 4000 p2p_dbg(p2p, "Updated no GO chan list"); 4001 4002 return 0; 4003 } 4004 4005 4006 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr, 4007 u8 *iface_addr) 4008 { 4009 struct p2p_device *dev = p2p_get_device(p2p, dev_addr); 4010 if (dev == NULL || is_zero_ether_addr(dev->interface_addr)) 4011 return -1; 4012 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN); 4013 return 0; 4014 } 4015 4016 4017 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr, 4018 u8 *dev_addr) 4019 { 4020 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4021 if (dev == NULL) 4022 return -1; 4023 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN); 4024 return 0; 4025 } 4026 4027 4028 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr) 4029 { 4030 os_memcpy(p2p->peer_filter, addr, ETH_ALEN); 4031 if (is_zero_ether_addr(p2p->peer_filter)) 4032 p2p_dbg(p2p, "Disable peer filter"); 4033 else 4034 p2p_dbg(p2p, "Enable peer filter for " MACSTR, 4035 MAC2STR(p2p->peer_filter)); 4036 } 4037 4038 4039 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled) 4040 { 4041 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled"); 4042 if (p2p->cross_connect == enabled) 4043 return; 4044 p2p->cross_connect = enabled; 4045 /* TODO: may need to tear down any action group where we are GO(?) */ 4046 } 4047 4048 4049 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr) 4050 { 4051 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4052 if (dev == NULL) 4053 return -1; 4054 if (dev->oper_freq <= 0) 4055 return -1; 4056 return dev->oper_freq; 4057 } 4058 4059 4060 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled) 4061 { 4062 p2p_dbg(p2p, "Intra BSS distribution %s", 4063 enabled ? "enabled" : "disabled"); 4064 p2p->cfg->p2p_intra_bss = enabled; 4065 } 4066 4067 4068 void p2p_update_channel_list(struct p2p_data *p2p, 4069 const struct p2p_channels *chan, 4070 const struct p2p_channels *cli_chan) 4071 { 4072 p2p_dbg(p2p, "Update channel list"); 4073 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels)); 4074 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 4075 os_memcpy(&p2p->cfg->cli_channels, cli_chan, 4076 sizeof(struct p2p_channels)); 4077 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 4078 } 4079 4080 4081 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 4082 const u8 *src, const u8 *bssid, const u8 *buf, 4083 size_t len, unsigned int wait_time) 4084 { 4085 if (p2p->p2p_scan_running) { 4086 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes"); 4087 if (p2p->after_scan_tx) { 4088 p2p_dbg(p2p, "Dropped previous pending Action frame TX"); 4089 os_free(p2p->after_scan_tx); 4090 } 4091 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) + 4092 len); 4093 if (p2p->after_scan_tx == NULL) 4094 return -1; 4095 p2p->after_scan_tx->freq = freq; 4096 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN); 4097 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN); 4098 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN); 4099 p2p->after_scan_tx->len = len; 4100 p2p->after_scan_tx->wait_time = wait_time; 4101 os_memcpy(p2p->after_scan_tx + 1, buf, len); 4102 return 0; 4103 } 4104 4105 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid, 4106 buf, len, wait_time); 4107 } 4108 4109 4110 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5, 4111 int freq_overall) 4112 { 4113 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d", 4114 freq_24, freq_5, freq_overall); 4115 p2p->best_freq_24 = freq_24; 4116 p2p->best_freq_5 = freq_5; 4117 p2p->best_freq_overall = freq_overall; 4118 } 4119 4120 4121 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq) 4122 { 4123 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq); 4124 p2p->own_freq_preference = freq; 4125 } 4126 4127 4128 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p) 4129 { 4130 if (p2p == NULL || p2p->go_neg_peer == NULL) 4131 return NULL; 4132 return p2p->go_neg_peer->info.p2p_device_addr; 4133 } 4134 4135 4136 const struct p2p_peer_info * 4137 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next) 4138 { 4139 struct p2p_device *dev; 4140 4141 if (addr) { 4142 dev = p2p_get_device(p2p, addr); 4143 if (!dev) 4144 return NULL; 4145 4146 if (!next) { 4147 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 4148 return NULL; 4149 4150 return &dev->info; 4151 } else { 4152 do { 4153 dev = dl_list_first(&dev->list, 4154 struct p2p_device, 4155 list); 4156 if (&dev->list == &p2p->devices) 4157 return NULL; 4158 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY); 4159 } 4160 } else { 4161 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4162 if (!dev) 4163 return NULL; 4164 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 4165 dev = dl_list_first(&dev->list, 4166 struct p2p_device, 4167 list); 4168 if (&dev->list == &p2p->devices) 4169 return NULL; 4170 } 4171 } 4172 4173 return &dev->info; 4174 } 4175 4176 4177 int p2p_in_progress(struct p2p_data *p2p) 4178 { 4179 if (p2p == NULL) 4180 return 0; 4181 if (p2p->state == P2P_SEARCH) 4182 return 2; 4183 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING; 4184 } 4185 4186 4187 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout, 4188 u8 client_timeout) 4189 { 4190 if (p2p) { 4191 p2p->go_timeout = go_timeout; 4192 p2p->client_timeout = client_timeout; 4193 } 4194 } 4195 4196 4197 #ifdef CONFIG_WIFI_DISPLAY 4198 4199 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p) 4200 { 4201 size_t g; 4202 struct p2p_group *group; 4203 4204 for (g = 0; g < p2p->num_groups; g++) { 4205 group = p2p->groups[g]; 4206 p2p_group_force_beacon_update_ies(group); 4207 } 4208 } 4209 4210 4211 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie) 4212 { 4213 wpabuf_free(p2p->wfd_ie_beacon); 4214 p2p->wfd_ie_beacon = ie; 4215 p2p_update_wfd_ie_groups(p2p); 4216 return 0; 4217 } 4218 4219 4220 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie) 4221 { 4222 wpabuf_free(p2p->wfd_ie_probe_req); 4223 p2p->wfd_ie_probe_req = ie; 4224 return 0; 4225 } 4226 4227 4228 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie) 4229 { 4230 wpabuf_free(p2p->wfd_ie_probe_resp); 4231 p2p->wfd_ie_probe_resp = ie; 4232 p2p_update_wfd_ie_groups(p2p); 4233 return 0; 4234 } 4235 4236 4237 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie) 4238 { 4239 wpabuf_free(p2p->wfd_ie_assoc_req); 4240 p2p->wfd_ie_assoc_req = ie; 4241 return 0; 4242 } 4243 4244 4245 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie) 4246 { 4247 wpabuf_free(p2p->wfd_ie_invitation); 4248 p2p->wfd_ie_invitation = ie; 4249 return 0; 4250 } 4251 4252 4253 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie) 4254 { 4255 wpabuf_free(p2p->wfd_ie_prov_disc_req); 4256 p2p->wfd_ie_prov_disc_req = ie; 4257 return 0; 4258 } 4259 4260 4261 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie) 4262 { 4263 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 4264 p2p->wfd_ie_prov_disc_resp = ie; 4265 return 0; 4266 } 4267 4268 4269 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie) 4270 { 4271 wpabuf_free(p2p->wfd_ie_go_neg); 4272 p2p->wfd_ie_go_neg = ie; 4273 return 0; 4274 } 4275 4276 4277 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem) 4278 { 4279 wpabuf_free(p2p->wfd_dev_info); 4280 if (elem) { 4281 p2p->wfd_dev_info = wpabuf_dup(elem); 4282 if (p2p->wfd_dev_info == NULL) 4283 return -1; 4284 } else 4285 p2p->wfd_dev_info = NULL; 4286 4287 return 0; 4288 } 4289 4290 4291 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem) 4292 { 4293 wpabuf_free(p2p->wfd_assoc_bssid); 4294 if (elem) { 4295 p2p->wfd_assoc_bssid = wpabuf_dup(elem); 4296 if (p2p->wfd_assoc_bssid == NULL) 4297 return -1; 4298 } else 4299 p2p->wfd_assoc_bssid = NULL; 4300 4301 return 0; 4302 } 4303 4304 4305 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p, 4306 const struct wpabuf *elem) 4307 { 4308 wpabuf_free(p2p->wfd_coupled_sink_info); 4309 if (elem) { 4310 p2p->wfd_coupled_sink_info = wpabuf_dup(elem); 4311 if (p2p->wfd_coupled_sink_info == NULL) 4312 return -1; 4313 } else 4314 p2p->wfd_coupled_sink_info = NULL; 4315 4316 return 0; 4317 } 4318 4319 #endif /* CONFIG_WIFI_DISPLAY */ 4320 4321 4322 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int, 4323 int max_disc_tu) 4324 { 4325 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0) 4326 return -1; 4327 4328 p2p->min_disc_int = min_disc_int; 4329 p2p->max_disc_int = max_disc_int; 4330 p2p->max_disc_tu = max_disc_tu; 4331 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d", 4332 min_disc_int, max_disc_int, max_disc_tu); 4333 4334 return 0; 4335 } 4336 4337 4338 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...) 4339 { 4340 va_list ap; 4341 char buf[500]; 4342 4343 if (!p2p->cfg->debug_print) 4344 return; 4345 4346 va_start(ap, fmt); 4347 vsnprintf(buf, sizeof(buf), fmt, ap); 4348 buf[sizeof(buf) - 1] = '\0'; 4349 va_end(ap); 4350 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf); 4351 } 4352 4353 4354 void p2p_info(struct p2p_data *p2p, const char *fmt, ...) 4355 { 4356 va_list ap; 4357 char buf[500]; 4358 4359 if (!p2p->cfg->debug_print) 4360 return; 4361 4362 va_start(ap, fmt); 4363 vsnprintf(buf, sizeof(buf), fmt, ap); 4364 buf[sizeof(buf) - 1] = '\0'; 4365 va_end(ap); 4366 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf); 4367 } 4368 4369 4370 void p2p_err(struct p2p_data *p2p, const char *fmt, ...) 4371 { 4372 va_list ap; 4373 char buf[500]; 4374 4375 if (!p2p->cfg->debug_print) 4376 return; 4377 4378 va_start(ap, fmt); 4379 vsnprintf(buf, sizeof(buf), fmt, ap); 4380 buf[sizeof(buf) - 1] = '\0'; 4381 va_end(ap); 4382 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf); 4383 } 4384 4385 4386 #ifdef CONFIG_WPS_NFC 4387 4388 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p, 4389 int client_freq, 4390 const u8 *go_dev_addr, 4391 const u8 *ssid, size_t ssid_len) 4392 { 4393 struct wpabuf *buf; 4394 u8 op_class, channel; 4395 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP; 4396 4397 buf = wpabuf_alloc(1000); 4398 if (buf == NULL) 4399 return NULL; 4400 4401 op_class = p2p->cfg->reg_class; 4402 channel = p2p->cfg->channel; 4403 4404 p2p_buf_add_capability(buf, p2p->dev_capab & 4405 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 4406 p2p_buf_add_device_info(buf, p2p, NULL); 4407 4408 if (p2p->num_groups > 0) { 4409 role = P2P_GO_IN_A_GROUP; 4410 p2p_freq_to_channel(p2p_group_get_freq(p2p->groups[0]), 4411 &op_class, &channel); 4412 } else if (client_freq > 0) { 4413 role = P2P_CLIENT_IN_A_GROUP; 4414 p2p_freq_to_channel(client_freq, &op_class, &channel); 4415 } 4416 4417 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class, 4418 channel, role); 4419 4420 if (p2p->num_groups > 0) { 4421 /* Limit number of clients to avoid very long message */ 4422 p2p_buf_add_group_info(p2p->groups[0], buf, 5); 4423 p2p_group_buf_add_id(p2p->groups[0], buf); 4424 } else if (client_freq > 0 && 4425 go_dev_addr && !is_zero_ether_addr(go_dev_addr) && 4426 ssid && ssid_len > 0) { 4427 /* 4428 * Add the optional P2P Group ID to indicate in which group this 4429 * device is a P2P Client. 4430 */ 4431 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len); 4432 } 4433 4434 return buf; 4435 } 4436 4437 4438 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p, 4439 int client_freq, 4440 const u8 *go_dev_addr, 4441 const u8 *ssid, size_t ssid_len) 4442 { 4443 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 4444 ssid_len); 4445 } 4446 4447 4448 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p, 4449 int client_freq, 4450 const u8 *go_dev_addr, 4451 const u8 *ssid, size_t ssid_len) 4452 { 4453 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 4454 ssid_len); 4455 } 4456 4457 4458 int p2p_process_nfc_connection_handover(struct p2p_data *p2p, 4459 struct p2p_nfc_params *params) 4460 { 4461 struct p2p_message msg; 4462 struct p2p_device *dev; 4463 const u8 *p2p_dev_addr; 4464 int freq; 4465 enum p2p_role_indication role; 4466 4467 params->next_step = NO_ACTION; 4468 4469 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len, 4470 params->p2p_attr, params->p2p_len, &msg)) { 4471 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC"); 4472 p2p_parse_free(&msg); 4473 return -1; 4474 } 4475 4476 if (msg.p2p_device_addr) 4477 p2p_dev_addr = msg.p2p_device_addr; 4478 else if (msg.device_id) 4479 p2p_dev_addr = msg.device_id; 4480 else { 4481 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 4482 p2p_parse_free(&msg); 4483 return -1; 4484 } 4485 4486 if (msg.oob_dev_password) { 4487 os_memcpy(params->oob_dev_pw, msg.oob_dev_password, 4488 msg.oob_dev_password_len); 4489 params->oob_dev_pw_len = msg.oob_dev_password_len; 4490 } 4491 4492 dev = p2p_create_device(p2p, p2p_dev_addr); 4493 if (dev == NULL) { 4494 p2p_parse_free(&msg); 4495 return -1; 4496 } 4497 4498 params->peer = &dev->info; 4499 4500 os_get_reltime(&dev->last_seen); 4501 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 4502 p2p_copy_wps_info(p2p, dev, 0, &msg); 4503 4504 if (!msg.oob_go_neg_channel) { 4505 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included"); 4506 return -1; 4507 } 4508 4509 if (msg.oob_go_neg_channel[3] == 0 && 4510 msg.oob_go_neg_channel[4] == 0) 4511 freq = 0; 4512 else 4513 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3], 4514 msg.oob_go_neg_channel[4]); 4515 if (freq < 0) { 4516 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel"); 4517 return -1; 4518 } 4519 role = msg.oob_go_neg_channel[5]; 4520 4521 if (role == P2P_GO_IN_A_GROUP) { 4522 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq); 4523 params->go_freq = freq; 4524 } else if (role == P2P_CLIENT_IN_A_GROUP) { 4525 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz", 4526 freq); 4527 params->go_freq = freq; 4528 } else 4529 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq); 4530 dev->oob_go_neg_freq = freq; 4531 4532 if (!params->sel && role != P2P_GO_IN_A_GROUP) { 4533 freq = p2p_channel_to_freq(p2p->cfg->reg_class, 4534 p2p->cfg->channel); 4535 if (freq < 0) { 4536 p2p_dbg(p2p, "Own listen channel not known"); 4537 return -1; 4538 } 4539 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq); 4540 dev->oob_go_neg_freq = freq; 4541 } 4542 4543 if (msg.group_id) { 4544 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN); 4545 params->go_ssid_len = msg.group_id_len - ETH_ALEN; 4546 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN, 4547 params->go_ssid_len); 4548 } 4549 4550 p2p_parse_free(&msg); 4551 4552 if (dev->flags & P2P_DEV_USER_REJECTED) { 4553 p2p_dbg(p2p, "Do not report rejected device"); 4554 return 0; 4555 } 4556 4557 if (!(dev->flags & P2P_DEV_REPORTED)) { 4558 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info, 4559 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 4560 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 4561 } 4562 4563 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0) 4564 params->next_step = BOTH_GO; 4565 else if (role == P2P_GO_IN_A_GROUP) 4566 params->next_step = JOIN_GROUP; 4567 else if (role == P2P_CLIENT_IN_A_GROUP) { 4568 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 4569 params->next_step = PEER_CLIENT; 4570 } else if (p2p->num_groups > 0) 4571 params->next_step = AUTH_JOIN; 4572 else if (params->sel) 4573 params->next_step = INIT_GO_NEG; 4574 else 4575 params->next_step = RESP_GO_NEG; 4576 4577 return 0; 4578 } 4579 4580 4581 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id, 4582 int go_intent, 4583 const u8 *own_interface_addr) 4584 { 4585 4586 p2p->authorized_oob_dev_pw_id = dev_pw_id; 4587 if (dev_pw_id == 0) { 4588 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover"); 4589 return; 4590 } 4591 4592 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover", 4593 dev_pw_id); 4594 4595 p2p->go_intent = go_intent; 4596 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 4597 } 4598 4599 #endif /* CONFIG_WPS_NFC */ 4600