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