p2p.c revision 5a1480c7c46c4236d93bfd303dde32062bee04ac
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 20static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx); 21static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev); 22static 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); 25static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 26 const u8 *sa, const u8 *data, 27 size_t len); 28static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx); 29static 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 50static 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 103static 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 112static 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 147const char * p2p_get_state_txt(struct p2p_data *p2p) 148{ 149 return p2p_state_txt(p2p->state); 150} 151 152 153u16 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 168void 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 181void 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 189void 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 198void 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 205void 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 wpabuf_free(peer->go_neg_conf); 222 peer->go_neg_conf = NULL; 223 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, 224 ETH_ALEN); 225 os_memcpy(res.peer_interface_addr, peer->intended_addr, 226 ETH_ALEN); 227 } 228 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 229} 230 231 232static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc) 233{ 234 unsigned int r, tu; 235 int freq; 236 struct wpabuf *ies; 237 238 p2p_dbg(p2p, "Starting short listen state (state=%s)", 239 p2p_state_txt(p2p->state)); 240 241 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 242 if (freq < 0) { 243 p2p_dbg(p2p, "Unknown regulatory class/channel"); 244 return; 245 } 246 247 os_get_random((u8 *) &r, sizeof(r)); 248 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) + 249 p2p->min_disc_int) * 100; 250 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu) 251 tu = p2p->max_disc_tu; 252 if (!dev_disc && tu < 100) 253 tu = 100; /* Need to wait in non-device discovery use cases */ 254 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen) 255 tu = p2p->cfg->max_listen * 1000 / 1024; 256 257 if (tu == 0) { 258 p2p_dbg(p2p, "Skip listen state since duration was 0 TU"); 259 p2p_set_timeout(p2p, 0, 0); 260 return; 261 } 262 263 p2p->pending_listen_freq = freq; 264 p2p->pending_listen_sec = 0; 265 p2p->pending_listen_usec = 1024 * tu; 266 267 ies = p2p_build_probe_resp_ies(p2p); 268 if (ies == NULL) 269 return; 270 271 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000, 272 ies) < 0) { 273 p2p_dbg(p2p, "Failed to start listen mode"); 274 p2p->pending_listen_freq = 0; 275 } 276 wpabuf_free(ies); 277} 278 279 280int p2p_listen(struct p2p_data *p2p, unsigned int timeout) 281{ 282 int freq; 283 struct wpabuf *ies; 284 285 p2p_dbg(p2p, "Going to listen(only) state"); 286 287 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 288 if (freq < 0) { 289 p2p_dbg(p2p, "Unknown regulatory class/channel"); 290 return -1; 291 } 292 293 p2p->pending_listen_freq = freq; 294 p2p->pending_listen_sec = timeout / 1000; 295 p2p->pending_listen_usec = (timeout % 1000) * 1000; 296 297 if (p2p->p2p_scan_running) { 298 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) { 299 p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen"); 300 return 0; 301 } 302 p2p_dbg(p2p, "p2p_scan running - delay start of listen state"); 303 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN; 304 return 0; 305 } 306 307 ies = p2p_build_probe_resp_ies(p2p); 308 if (ies == NULL) 309 return -1; 310 311 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) { 312 p2p_dbg(p2p, "Failed to start listen mode"); 313 p2p->pending_listen_freq = 0; 314 wpabuf_free(ies); 315 return -1; 316 } 317 wpabuf_free(ies); 318 319 p2p_set_state(p2p, P2P_LISTEN_ONLY); 320 321 return 0; 322} 323 324 325static void p2p_device_clear_reported(struct p2p_data *p2p) 326{ 327 struct p2p_device *dev; 328 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) 329 dev->flags &= ~P2P_DEV_REPORTED; 330} 331 332 333/** 334 * p2p_get_device - Fetch a peer entry 335 * @p2p: P2P module context from p2p_init() 336 * @addr: P2P Device Address of the peer 337 * Returns: Pointer to the device entry or %NULL if not found 338 */ 339struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr) 340{ 341 struct p2p_device *dev; 342 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 343 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0) 344 return dev; 345 } 346 return NULL; 347} 348 349 350/** 351 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address 352 * @p2p: P2P module context from p2p_init() 353 * @addr: P2P Interface Address of the peer 354 * Returns: Pointer to the device entry or %NULL if not found 355 */ 356struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p, 357 const u8 *addr) 358{ 359 struct p2p_device *dev; 360 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 361 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0) 362 return dev; 363 } 364 return NULL; 365} 366 367 368/** 369 * p2p_create_device - Create a peer entry 370 * @p2p: P2P module context from p2p_init() 371 * @addr: P2P Device Address of the peer 372 * Returns: Pointer to the device entry or %NULL on failure 373 * 374 * If there is already an entry for the peer, it will be returned instead of 375 * creating a new one. 376 */ 377static struct p2p_device * p2p_create_device(struct p2p_data *p2p, 378 const u8 *addr) 379{ 380 struct p2p_device *dev, *oldest = NULL; 381 size_t count = 0; 382 383 dev = p2p_get_device(p2p, addr); 384 if (dev) 385 return dev; 386 387 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 388 count++; 389 if (oldest == NULL || 390 os_reltime_before(&dev->last_seen, &oldest->last_seen)) 391 oldest = dev; 392 } 393 if (count + 1 > p2p->cfg->max_peers && oldest) { 394 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer"); 395 dl_list_del(&oldest->list); 396 p2p_device_free(p2p, oldest); 397 } 398 399 dev = os_zalloc(sizeof(*dev)); 400 if (dev == NULL) 401 return NULL; 402 dl_list_add(&p2p->devices, &dev->list); 403 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN); 404 405 return dev; 406} 407 408 409static void p2p_copy_client_info(struct p2p_device *dev, 410 struct p2p_client_info *cli) 411{ 412 os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len); 413 dev->info.device_name[cli->dev_name_len] = '\0'; 414 dev->info.dev_capab = cli->dev_capab; 415 dev->info.config_methods = cli->config_methods; 416 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8); 417 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types; 418 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types, 419 dev->info.wps_sec_dev_type_list_len); 420} 421 422 423static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr, 424 const u8 *go_interface_addr, int freq, 425 const u8 *gi, size_t gi_len) 426{ 427 struct p2p_group_info info; 428 size_t c; 429 struct p2p_device *dev; 430 431 if (gi == NULL) 432 return 0; 433 434 if (p2p_group_info_parse(gi, gi_len, &info) < 0) 435 return -1; 436 437 /* 438 * Clear old data for this group; if the devices are still in the 439 * group, the information will be restored in the loop following this. 440 */ 441 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 442 if (os_memcmp(dev->member_in_go_iface, go_interface_addr, 443 ETH_ALEN) == 0) { 444 os_memset(dev->member_in_go_iface, 0, ETH_ALEN); 445 os_memset(dev->member_in_go_dev, 0, ETH_ALEN); 446 } 447 } 448 449 for (c = 0; c < info.num_clients; c++) { 450 struct p2p_client_info *cli = &info.client[c]; 451 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr, 452 ETH_ALEN) == 0) 453 continue; /* ignore our own entry */ 454 dev = p2p_get_device(p2p, cli->p2p_device_addr); 455 if (dev) { 456 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY | 457 P2P_DEV_PROBE_REQ_ONLY)) { 458 /* 459 * Update information since we have not 460 * received this directly from the client. 461 */ 462 p2p_copy_client_info(dev, cli); 463 } else { 464 /* 465 * Need to update P2P Client Discoverability 466 * flag since it is valid only in P2P Group 467 * Info attribute. 468 */ 469 dev->info.dev_capab &= 470 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 471 dev->info.dev_capab |= 472 cli->dev_capab & 473 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 474 } 475 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 476 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 477 } 478 } else { 479 dev = p2p_create_device(p2p, cli->p2p_device_addr); 480 if (dev == NULL) 481 continue; 482 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 483 p2p_copy_client_info(dev, cli); 484 dev->oper_freq = freq; 485 p2p->cfg->dev_found(p2p->cfg->cb_ctx, 486 dev->info.p2p_device_addr, 487 &dev->info, 1); 488 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 489 } 490 491 os_memcpy(dev->interface_addr, cli->p2p_interface_addr, 492 ETH_ALEN); 493 os_get_reltime(&dev->last_seen); 494 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN); 495 os_memcpy(dev->member_in_go_iface, go_interface_addr, 496 ETH_ALEN); 497 } 498 499 return 0; 500} 501 502 503static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev, 504 int probe_req, const struct p2p_message *msg) 505{ 506 os_memcpy(dev->info.device_name, msg->device_name, 507 sizeof(dev->info.device_name)); 508 509 if (msg->manufacturer && 510 msg->manufacturer_len < sizeof(dev->info.manufacturer)) { 511 os_memset(dev->info.manufacturer, 0, 512 sizeof(dev->info.manufacturer)); 513 os_memcpy(dev->info.manufacturer, msg->manufacturer, 514 msg->manufacturer_len); 515 } 516 517 if (msg->model_name && 518 msg->model_name_len < sizeof(dev->info.model_name)) { 519 os_memset(dev->info.model_name, 0, 520 sizeof(dev->info.model_name)); 521 os_memcpy(dev->info.model_name, msg->model_name, 522 msg->model_name_len); 523 } 524 525 if (msg->model_number && 526 msg->model_number_len < sizeof(dev->info.model_number)) { 527 os_memset(dev->info.model_number, 0, 528 sizeof(dev->info.model_number)); 529 os_memcpy(dev->info.model_number, msg->model_number, 530 msg->model_number_len); 531 } 532 533 if (msg->serial_number && 534 msg->serial_number_len < sizeof(dev->info.serial_number)) { 535 os_memset(dev->info.serial_number, 0, 536 sizeof(dev->info.serial_number)); 537 os_memcpy(dev->info.serial_number, msg->serial_number, 538 msg->serial_number_len); 539 } 540 541 if (msg->pri_dev_type) 542 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type, 543 sizeof(dev->info.pri_dev_type)); 544 else if (msg->wps_pri_dev_type) 545 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type, 546 sizeof(dev->info.pri_dev_type)); 547 548 if (msg->wps_sec_dev_type_list) { 549 os_memcpy(dev->info.wps_sec_dev_type_list, 550 msg->wps_sec_dev_type_list, 551 msg->wps_sec_dev_type_list_len); 552 dev->info.wps_sec_dev_type_list_len = 553 msg->wps_sec_dev_type_list_len; 554 } 555 556 if (msg->capability) { 557 /* 558 * P2P Client Discoverability bit is reserved in all frames 559 * that use this function, so do not change its value here. 560 */ 561 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 562 dev->info.dev_capab |= msg->capability[0] & 563 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 564 dev->info.group_capab = msg->capability[1]; 565 } 566 567 if (msg->ext_listen_timing) { 568 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing); 569 dev->ext_listen_interval = 570 WPA_GET_LE16(msg->ext_listen_timing + 2); 571 } 572 573 if (!probe_req) { 574 u16 new_config_methods; 575 new_config_methods = msg->config_methods ? 576 msg->config_methods : msg->wps_config_methods; 577 if (new_config_methods && 578 dev->info.config_methods != new_config_methods) { 579 p2p_dbg(p2p, "Update peer " MACSTR 580 " config_methods 0x%x -> 0x%x", 581 MAC2STR(dev->info.p2p_device_addr), 582 dev->info.config_methods, 583 new_config_methods); 584 dev->info.config_methods = new_config_methods; 585 } 586 } 587} 588 589 590/** 591 * p2p_add_device - Add peer entries based on scan results or P2P frames 592 * @p2p: P2P module context from p2p_init() 593 * @addr: Source address of Beacon or Probe Response frame (may be either 594 * P2P Device Address or P2P Interface Address) 595 * @level: Signal level (signal strength of the received frame from the peer) 596 * @freq: Frequency on which the Beacon or Probe Response frame was received 597 * @rx_time: Time when the result was received 598 * @ies: IEs from the Beacon or Probe Response frame 599 * @ies_len: Length of ies buffer in octets 600 * @scan_res: Whether this was based on scan results 601 * Returns: 0 on success, -1 on failure 602 * 603 * If the scan result is for a GO, the clients in the group will also be added 604 * to the peer table. This function can also be used with some other frames 605 * like Provision Discovery Request that contains P2P Capability and P2P Device 606 * Info attributes. 607 */ 608int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq, 609 struct os_reltime *rx_time, int level, const u8 *ies, 610 size_t ies_len, int scan_res) 611{ 612 struct p2p_device *dev; 613 struct p2p_message msg; 614 const u8 *p2p_dev_addr; 615 int i; 616 struct os_reltime time_now; 617 618 os_memset(&msg, 0, sizeof(msg)); 619 if (p2p_parse_ies(ies, ies_len, &msg)) { 620 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry"); 621 p2p_parse_free(&msg); 622 return -1; 623 } 624 625 if (msg.p2p_device_addr) 626 p2p_dev_addr = msg.p2p_device_addr; 627 else if (msg.device_id) 628 p2p_dev_addr = msg.device_id; 629 else { 630 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 631 p2p_parse_free(&msg); 632 return -1; 633 } 634 635 if (!is_zero_ether_addr(p2p->peer_filter) && 636 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) { 637 p2p_dbg(p2p, "Do not add peer filter for " MACSTR 638 " due to peer filter", MAC2STR(p2p_dev_addr)); 639 p2p_parse_free(&msg); 640 return 0; 641 } 642 643 dev = p2p_create_device(p2p, p2p_dev_addr); 644 if (dev == NULL) { 645 p2p_parse_free(&msg); 646 return -1; 647 } 648 649 if (rx_time == NULL) { 650 os_get_reltime(&time_now); 651 rx_time = &time_now; 652 } 653 654 /* 655 * Update the device entry only if the new peer 656 * entry is newer than the one previously stored. 657 */ 658 if (dev->last_seen.sec > 0 && 659 os_reltime_before(rx_time, &dev->last_seen)) { 660 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)", 661 (unsigned int) rx_time->sec, 662 (unsigned int) rx_time->usec, 663 (unsigned int) dev->last_seen.sec, 664 (unsigned int) dev->last_seen.usec); 665 p2p_parse_free(&msg); 666 return -1; 667 } 668 669 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime)); 670 671 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 672 673 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0) 674 os_memcpy(dev->interface_addr, addr, ETH_ALEN); 675 if (msg.ssid && 676 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 677 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 678 != 0)) { 679 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]); 680 dev->oper_ssid_len = msg.ssid[1]; 681 } 682 683 if (freq >= 2412 && freq <= 2484 && msg.ds_params && 684 *msg.ds_params >= 1 && *msg.ds_params <= 14) { 685 int ds_freq; 686 if (*msg.ds_params == 14) 687 ds_freq = 2484; 688 else 689 ds_freq = 2407 + *msg.ds_params * 5; 690 if (freq != ds_freq) { 691 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz", 692 freq, ds_freq); 693 freq = ds_freq; 694 } 695 } 696 697 if (dev->listen_freq && dev->listen_freq != freq && scan_res) { 698 p2p_dbg(p2p, "Update Listen frequency based on scan results (" 699 MACSTR " %d -> %d MHz (DS param %d)", 700 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq, 701 freq, msg.ds_params ? *msg.ds_params : -1); 702 } 703 if (scan_res) { 704 dev->listen_freq = freq; 705 if (msg.group_info) 706 dev->oper_freq = freq; 707 } 708 dev->info.level = level; 709 710 p2p_copy_wps_info(p2p, dev, 0, &msg); 711 712 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 713 wpabuf_free(dev->info.wps_vendor_ext[i]); 714 dev->info.wps_vendor_ext[i] = NULL; 715 } 716 717 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 718 if (msg.wps_vendor_ext[i] == NULL) 719 break; 720 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy( 721 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]); 722 if (dev->info.wps_vendor_ext[i] == NULL) 723 break; 724 } 725 726 if (msg.wfd_subelems) { 727 wpabuf_free(dev->info.wfd_subelems); 728 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 729 } 730 731 if (scan_res) { 732 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq, 733 msg.group_info, msg.group_info_len); 734 } 735 736 p2p_parse_free(&msg); 737 738 if (dev->flags & P2P_DEV_REPORTED) 739 return 0; 740 741 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)", 742 freq, (unsigned int) rx_time->sec, 743 (unsigned int) rx_time->usec); 744 if (dev->flags & P2P_DEV_USER_REJECTED) { 745 p2p_dbg(p2p, "Do not report rejected device"); 746 return 0; 747 } 748 749 if (dev->info.config_methods == 0 && 750 (freq == 2412 || freq == 2437 || freq == 2462)) { 751 /* 752 * If we have only seen a Beacon frame from a GO, we do not yet 753 * know what WPS config methods it supports. Since some 754 * applications use config_methods value from P2P-DEVICE-FOUND 755 * events, postpone reporting this peer until we've fully 756 * discovered its capabilities. 757 * 758 * At least for now, do this only if the peer was detected on 759 * one of the social channels since that peer can be easily be 760 * found again and there are no limitations of having to use 761 * passive scan on this channels, so this can be done through 762 * Probe Response frame that includes the config_methods 763 * information. 764 */ 765 p2p_dbg(p2p, "Do not report peer " MACSTR 766 " with unknown config methods", MAC2STR(addr)); 767 return 0; 768 } 769 770 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 771 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 772 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 773 774 return 0; 775} 776 777 778static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev) 779{ 780 int i; 781 782 if (p2p->go_neg_peer == dev) { 783 /* 784 * If GO Negotiation is in progress, report that it has failed. 785 */ 786 p2p_go_neg_failed(p2p, dev, -1); 787 p2p->go_neg_peer = NULL; 788 } 789 if (p2p->invite_peer == dev) 790 p2p->invite_peer = NULL; 791 if (p2p->sd_peer == dev) 792 p2p->sd_peer = NULL; 793 if (p2p->pending_client_disc_go == dev) 794 p2p->pending_client_disc_go = NULL; 795 796 /* dev_lost() device, but only if it was previously dev_found() */ 797 if (dev->flags & P2P_DEV_REPORTED_ONCE) 798 p2p->cfg->dev_lost(p2p->cfg->cb_ctx, 799 dev->info.p2p_device_addr); 800 801 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 802 wpabuf_free(dev->info.wps_vendor_ext[i]); 803 dev->info.wps_vendor_ext[i] = NULL; 804 } 805 806 wpabuf_free(dev->info.wfd_subelems); 807 wpabuf_free(dev->go_neg_conf); 808 809 os_free(dev); 810} 811 812 813static 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 867static 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 905static 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 913static 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 960static 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 974static 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 982int 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 res = 0; /* do not report failure */ 1053 } else { 1054 p2p_dbg(p2p, "Failed to start p2p_scan"); 1055 p2p_set_state(p2p, P2P_IDLE); 1056 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1057 } 1058 1059 return res; 1060} 1061 1062 1063void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq) 1064{ 1065 p2p_dbg(p2p, "Stopping find"); 1066 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1067 p2p_clear_timeout(p2p); 1068 if (p2p->state == P2P_SEARCH) 1069 p2p->cfg->find_stopped(p2p->cfg->cb_ctx); 1070 p2p_set_state(p2p, P2P_IDLE); 1071 p2p_free_req_dev_types(p2p); 1072 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1073 if (p2p->go_neg_peer) 1074 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1075 p2p->go_neg_peer = NULL; 1076 p2p->sd_peer = NULL; 1077 p2p->invite_peer = NULL; 1078 p2p_stop_listen_for_freq(p2p, freq); 1079} 1080 1081 1082void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq) 1083{ 1084 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) { 1085 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response"); 1086 return; 1087 } 1088 if (p2p->in_listen) { 1089 p2p->in_listen = 0; 1090 p2p_clear_timeout(p2p); 1091 } 1092 if (p2p->drv_in_listen) { 1093 /* 1094 * The driver may not deliver callback to p2p_listen_end() 1095 * when the operation gets canceled, so clear the internal 1096 * variable that is tracking driver state. 1097 */ 1098 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen); 1099 p2p->drv_in_listen = 0; 1100 } 1101 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1102} 1103 1104 1105void p2p_stop_listen(struct p2p_data *p2p) 1106{ 1107 if (p2p->state != P2P_LISTEN_ONLY) { 1108 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state."); 1109 return; 1110 } 1111 1112 p2p_stop_listen_for_freq(p2p, 0); 1113 p2p_set_state(p2p, P2P_IDLE); 1114} 1115 1116 1117void p2p_stop_find(struct p2p_data *p2p) 1118{ 1119 p2p_stop_find_for_freq(p2p, 0); 1120} 1121 1122 1123static int p2p_prepare_channel_pref(struct p2p_data *p2p, 1124 unsigned int force_freq, 1125 unsigned int pref_freq, int go) 1126{ 1127 u8 op_class, op_channel; 1128 unsigned int freq = force_freq ? force_freq : pref_freq; 1129 1130 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d", 1131 force_freq, pref_freq, go); 1132 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) { 1133 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq); 1134 return -1; 1135 } 1136 1137 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) && 1138 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class, 1139 op_channel))) { 1140 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P", 1141 freq, op_class, op_channel); 1142 return -1; 1143 } 1144 1145 p2p->op_reg_class = op_class; 1146 p2p->op_channel = op_channel; 1147 1148 if (force_freq) { 1149 p2p->channels.reg_classes = 1; 1150 p2p->channels.reg_class[0].channels = 1; 1151 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 1152 p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 1153 } else { 1154 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1155 sizeof(struct p2p_channels)); 1156 } 1157 1158 return 0; 1159} 1160 1161 1162static void p2p_prepare_channel_best(struct p2p_data *p2p) 1163{ 1164 u8 op_class, op_channel; 1165 const int op_classes_5ghz[] = { 124, 115, 0 }; 1166 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 }; 1167 const int op_classes_vht[] = { 128, 0 }; 1168 1169 p2p_dbg(p2p, "Prepare channel best"); 1170 1171 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 && 1172 p2p_supported_freq(p2p, p2p->best_freq_overall) && 1173 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel) 1174 == 0) { 1175 p2p_dbg(p2p, "Select best overall channel as operating channel preference"); 1176 p2p->op_reg_class = op_class; 1177 p2p->op_channel = op_channel; 1178 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 && 1179 p2p_supported_freq(p2p, p2p->best_freq_5) && 1180 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel) 1181 == 0) { 1182 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference"); 1183 p2p->op_reg_class = op_class; 1184 p2p->op_channel = op_channel; 1185 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 && 1186 p2p_supported_freq(p2p, p2p->best_freq_24) && 1187 p2p_freq_to_channel(p2p->best_freq_24, &op_class, 1188 &op_channel) == 0) { 1189 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference"); 1190 p2p->op_reg_class = op_class; 1191 p2p->op_channel = op_channel; 1192 } else if (p2p->cfg->num_pref_chan > 0 && 1193 p2p_channels_includes(&p2p->cfg->channels, 1194 p2p->cfg->pref_chan[0].op_class, 1195 p2p->cfg->pref_chan[0].chan)) { 1196 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference"); 1197 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class; 1198 p2p->op_channel = p2p->cfg->pref_chan[0].chan; 1199 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht, 1200 &p2p->op_reg_class, &p2p->op_channel) == 1201 0) { 1202 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference", 1203 p2p->op_reg_class, p2p->op_channel); 1204 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40, 1205 &p2p->op_reg_class, &p2p->op_channel) == 1206 0) { 1207 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference", 1208 p2p->op_reg_class, p2p->op_channel); 1209 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz, 1210 &p2p->op_reg_class, &p2p->op_channel) == 1211 0) { 1212 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference", 1213 p2p->op_reg_class, p2p->op_channel); 1214 } else if (p2p_channels_includes(&p2p->cfg->channels, 1215 p2p->cfg->op_reg_class, 1216 p2p->cfg->op_channel)) { 1217 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference"); 1218 p2p->op_reg_class = p2p->cfg->op_reg_class; 1219 p2p->op_channel = p2p->cfg->op_channel; 1220 } else if (p2p_channel_random_social(&p2p->cfg->channels, 1221 &p2p->op_reg_class, 1222 &p2p->op_channel) == 0) { 1223 p2p_dbg(p2p, "Select random available social channel %d from 2.4 GHz band as operating channel preference", 1224 p2p->op_channel); 1225 } else { 1226 /* Select any random available channel from the first available 1227 * operating class */ 1228 p2p_channel_select(&p2p->cfg->channels, NULL, 1229 &p2p->op_reg_class, 1230 &p2p->op_channel); 1231 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference", 1232 p2p->op_channel, p2p->op_reg_class); 1233 } 1234 1235 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1236 sizeof(struct p2p_channels)); 1237} 1238 1239 1240/** 1241 * p2p_prepare_channel - Select operating channel for GO Negotiation 1242 * @p2p: P2P module context from p2p_init() 1243 * @dev: Selected peer device 1244 * @force_freq: Forced frequency in MHz or 0 if not forced 1245 * @pref_freq: Preferred frequency in MHz or 0 if no preference 1246 * @go: Whether the local end will be forced to be GO 1247 * Returns: 0 on success, -1 on failure (channel not supported for P2P) 1248 * 1249 * This function is used to do initial operating channel selection for GO 1250 * Negotiation prior to having received peer information. The selected channel 1251 * may be further optimized in p2p_reselect_channel() once the peer information 1252 * is available. 1253 */ 1254int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev, 1255 unsigned int force_freq, unsigned int pref_freq, int go) 1256{ 1257 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d", 1258 force_freq, pref_freq, go); 1259 if (force_freq || pref_freq) { 1260 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) < 1261 0) 1262 return -1; 1263 } else { 1264 p2p_prepare_channel_best(p2p); 1265 } 1266 p2p_channels_dump(p2p, "prepared channels", &p2p->channels); 1267 if (go) 1268 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq); 1269 else if (!force_freq) 1270 p2p_channels_union(&p2p->channels, &p2p->cfg->cli_channels, 1271 &p2p->channels); 1272 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels); 1273 1274 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s", 1275 p2p->op_reg_class, p2p->op_channel, 1276 force_freq ? " (forced)" : ""); 1277 1278 if (force_freq) 1279 dev->flags |= P2P_DEV_FORCE_FREQ; 1280 else 1281 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1282 1283 return 0; 1284} 1285 1286 1287static void p2p_set_dev_persistent(struct p2p_device *dev, 1288 int persistent_group) 1289{ 1290 switch (persistent_group) { 1291 case 0: 1292 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP | 1293 P2P_DEV_PREFER_PERSISTENT_RECONN); 1294 break; 1295 case 1: 1296 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP; 1297 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN; 1298 break; 1299 case 2: 1300 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP | 1301 P2P_DEV_PREFER_PERSISTENT_RECONN; 1302 break; 1303 } 1304} 1305 1306 1307int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr, 1308 enum p2p_wps_method wps_method, 1309 int go_intent, const u8 *own_interface_addr, 1310 unsigned int force_freq, int persistent_group, 1311 const u8 *force_ssid, size_t force_ssid_len, 1312 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id) 1313{ 1314 struct p2p_device *dev; 1315 1316 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR 1317 " GO Intent=%d Intended Interface Address=" MACSTR 1318 " wps_method=%d persistent_group=%d pd_before_go_neg=%d " 1319 "oob_pw_id=%u", 1320 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1321 wps_method, persistent_group, pd_before_go_neg, oob_pw_id); 1322 1323 dev = p2p_get_device(p2p, peer_addr); 1324 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 1325 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR, 1326 MAC2STR(peer_addr)); 1327 return -1; 1328 } 1329 1330 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, 1331 go_intent == 15) < 0) 1332 return -1; 1333 1334 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 1335 if (!(dev->info.dev_capab & 1336 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 1337 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1338 " that is in a group and is not discoverable", 1339 MAC2STR(peer_addr)); 1340 return -1; 1341 } 1342 if (dev->oper_freq <= 0) { 1343 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1344 " with incomplete information", 1345 MAC2STR(peer_addr)); 1346 return -1; 1347 } 1348 1349 /* 1350 * First, try to connect directly. If the peer does not 1351 * acknowledge frames, assume it is sleeping and use device 1352 * discoverability via the GO at that point. 1353 */ 1354 } 1355 1356 p2p->ssid_set = 0; 1357 if (force_ssid) { 1358 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1359 force_ssid, force_ssid_len); 1360 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1361 p2p->ssid_len = force_ssid_len; 1362 p2p->ssid_set = 1; 1363 } 1364 1365 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1366 dev->flags &= ~P2P_DEV_USER_REJECTED; 1367 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 1368 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1369 if (pd_before_go_neg) 1370 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG; 1371 else { 1372 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG; 1373 /* 1374 * Assign dialog token and tie breaker here to use the same 1375 * values in each retry within the same GO Negotiation exchange. 1376 */ 1377 dev->dialog_token++; 1378 if (dev->dialog_token == 0) 1379 dev->dialog_token = 1; 1380 dev->tie_breaker = p2p->next_tie_breaker; 1381 p2p->next_tie_breaker = !p2p->next_tie_breaker; 1382 } 1383 dev->connect_reqs = 0; 1384 dev->go_neg_req_sent = 0; 1385 dev->go_state = UNKNOWN_GO; 1386 p2p_set_dev_persistent(dev, persistent_group); 1387 p2p->go_intent = go_intent; 1388 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1389 1390 if (p2p->state != P2P_IDLE) 1391 p2p_stop_find(p2p); 1392 1393 if (p2p->after_scan_tx) { 1394 /* 1395 * We need to drop the pending frame to avoid issues with the 1396 * new GO Negotiation, e.g., when the pending frame was from a 1397 * previous attempt at starting a GO Negotiation. 1398 */ 1399 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion"); 1400 os_free(p2p->after_scan_tx); 1401 p2p->after_scan_tx = NULL; 1402 } 1403 1404 dev->wps_method = wps_method; 1405 dev->oob_pw_id = oob_pw_id; 1406 dev->status = P2P_SC_SUCCESS; 1407 1408 if (p2p->p2p_scan_running) { 1409 p2p_dbg(p2p, "p2p_scan running - delay connect send"); 1410 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT; 1411 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN); 1412 return 0; 1413 } 1414 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1415 1416 return p2p_connect_send(p2p, dev); 1417} 1418 1419 1420int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr, 1421 enum p2p_wps_method wps_method, 1422 int go_intent, const u8 *own_interface_addr, 1423 unsigned int force_freq, int persistent_group, 1424 const u8 *force_ssid, size_t force_ssid_len, 1425 unsigned int pref_freq, u16 oob_pw_id) 1426{ 1427 struct p2p_device *dev; 1428 1429 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR 1430 " GO Intent=%d Intended Interface Address=" MACSTR 1431 " wps_method=%d persistent_group=%d oob_pw_id=%u", 1432 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1433 wps_method, persistent_group, oob_pw_id); 1434 1435 dev = p2p_get_device(p2p, peer_addr); 1436 if (dev == NULL) { 1437 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR, 1438 MAC2STR(peer_addr)); 1439 return -1; 1440 } 1441 1442 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent == 1443 15) < 0) 1444 return -1; 1445 1446 p2p->ssid_set = 0; 1447 if (force_ssid) { 1448 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1449 force_ssid, force_ssid_len); 1450 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1451 p2p->ssid_len = force_ssid_len; 1452 p2p->ssid_set = 1; 1453 } 1454 1455 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1456 dev->flags &= ~P2P_DEV_USER_REJECTED; 1457 dev->go_neg_req_sent = 0; 1458 dev->go_state = UNKNOWN_GO; 1459 p2p_set_dev_persistent(dev, persistent_group); 1460 p2p->go_intent = go_intent; 1461 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1462 1463 dev->wps_method = wps_method; 1464 dev->oob_pw_id = oob_pw_id; 1465 dev->status = P2P_SC_SUCCESS; 1466 1467 return 0; 1468} 1469 1470 1471void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr, 1472 struct p2p_device *dev, struct p2p_message *msg) 1473{ 1474 os_get_reltime(&dev->last_seen); 1475 1476 p2p_copy_wps_info(p2p, dev, 0, msg); 1477 1478 if (msg->listen_channel) { 1479 int freq; 1480 freq = p2p_channel_to_freq(msg->listen_channel[3], 1481 msg->listen_channel[4]); 1482 if (freq < 0) { 1483 p2p_dbg(p2p, "Unknown peer Listen channel: " 1484 "country=%c%c(0x%02x) reg_class=%u channel=%u", 1485 msg->listen_channel[0], 1486 msg->listen_channel[1], 1487 msg->listen_channel[2], 1488 msg->listen_channel[3], 1489 msg->listen_channel[4]); 1490 } else { 1491 p2p_dbg(p2p, "Update peer " MACSTR 1492 " Listen channel: %u -> %u MHz", 1493 MAC2STR(dev->info.p2p_device_addr), 1494 dev->listen_freq, freq); 1495 dev->listen_freq = freq; 1496 } 1497 } 1498 1499 if (msg->wfd_subelems) { 1500 wpabuf_free(dev->info.wfd_subelems); 1501 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems); 1502 } 1503 1504 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 1505 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 1506 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request"); 1507 } else { 1508 p2p_dbg(p2p, "Created device entry based on GO Neg Req: " 1509 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' " 1510 "listen_freq=%d", 1511 MAC2STR(dev->info.p2p_device_addr), 1512 dev->info.dev_capab, dev->info.group_capab, 1513 dev->info.device_name, dev->listen_freq); 1514 } 1515 1516 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY; 1517 1518 if (dev->flags & P2P_DEV_USER_REJECTED) { 1519 p2p_dbg(p2p, "Do not report rejected device"); 1520 return; 1521 } 1522 1523 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 1524 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 1525 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 1526} 1527 1528 1529void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len) 1530{ 1531 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 1532 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2); 1533 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2], 1534 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len); 1535 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len; 1536} 1537 1538 1539int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params) 1540{ 1541 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len); 1542 p2p_random(params->passphrase, 8); 1543 return 0; 1544} 1545 1546 1547void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer) 1548{ 1549 struct p2p_go_neg_results res; 1550 int go = peer->go_state == LOCAL_GO; 1551 struct p2p_channels intersection; 1552 int freqs; 1553 size_t i, j; 1554 1555 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)", 1556 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer"); 1557 1558 os_memset(&res, 0, sizeof(res)); 1559 res.role_go = go; 1560 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 1561 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 1562 res.wps_method = peer->wps_method; 1563 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 1564 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 1565 res.persistent_group = 2; 1566 else 1567 res.persistent_group = 1; 1568 } 1569 1570 if (go) { 1571 /* Setup AP mode for WPS provisioning */ 1572 res.freq = p2p_channel_to_freq(p2p->op_reg_class, 1573 p2p->op_channel); 1574 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1575 res.ssid_len = p2p->ssid_len; 1576 p2p_random(res.passphrase, 8); 1577 } else { 1578 res.freq = peer->oper_freq; 1579 if (p2p->ssid_len) { 1580 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1581 res.ssid_len = p2p->ssid_len; 1582 } 1583 } 1584 1585 p2p_channels_dump(p2p, "own channels", &p2p->channels); 1586 p2p_channels_dump(p2p, "peer channels", &peer->channels); 1587 p2p_channels_intersect(&p2p->channels, &peer->channels, 1588 &intersection); 1589 if (go) { 1590 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq); 1591 p2p_channels_dump(p2p, "intersection after no-GO removal", 1592 &intersection); 1593 } 1594 freqs = 0; 1595 for (i = 0; i < intersection.reg_classes; i++) { 1596 struct p2p_reg_class *c = &intersection.reg_class[i]; 1597 if (freqs + 1 == P2P_MAX_CHANNELS) 1598 break; 1599 for (j = 0; j < c->channels; j++) { 1600 int freq; 1601 if (freqs + 1 == P2P_MAX_CHANNELS) 1602 break; 1603 freq = p2p_channel_to_freq(c->reg_class, c->channel[j]); 1604 if (freq < 0) 1605 continue; 1606 res.freq_list[freqs++] = freq; 1607 } 1608 } 1609 1610 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout; 1611 1612 p2p_clear_timeout(p2p); 1613 p2p->ssid_set = 0; 1614 peer->go_neg_req_sent = 0; 1615 peer->wps_method = WPS_NOT_READY; 1616 peer->oob_pw_id = 0; 1617 wpabuf_free(peer->go_neg_conf); 1618 peer->go_neg_conf = NULL; 1619 1620 p2p_set_state(p2p, P2P_PROVISIONING); 1621 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 1622} 1623 1624 1625static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa, 1626 const u8 *data, size_t len, int rx_freq) 1627{ 1628 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa)); 1629 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len); 1630 1631 if (len < 1) 1632 return; 1633 1634 switch (data[0]) { 1635 case P2P_GO_NEG_REQ: 1636 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq); 1637 break; 1638 case P2P_GO_NEG_RESP: 1639 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq); 1640 break; 1641 case P2P_GO_NEG_CONF: 1642 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1); 1643 break; 1644 case P2P_INVITATION_REQ: 1645 p2p_process_invitation_req(p2p, sa, data + 1, len - 1, 1646 rx_freq); 1647 break; 1648 case P2P_INVITATION_RESP: 1649 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 1650 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1); 1651 break; 1652 case P2P_PROV_DISC_REQ: 1653 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1654 break; 1655 case P2P_PROV_DISC_RESP: 1656 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1); 1657 break; 1658 case P2P_DEV_DISC_REQ: 1659 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1660 break; 1661 case P2P_DEV_DISC_RESP: 1662 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1); 1663 break; 1664 default: 1665 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d", 1666 data[0]); 1667 break; 1668 } 1669} 1670 1671 1672static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, 1673 const u8 *sa, const u8 *bssid, const u8 *data, 1674 size_t len, int freq) 1675{ 1676 if (len < 1) 1677 return; 1678 1679 switch (data[0]) { 1680 case WLAN_PA_VENDOR_SPECIFIC: 1681 data++; 1682 len--; 1683 if (len < 4) 1684 return; 1685 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1686 return; 1687 1688 data += 4; 1689 len -= 4; 1690 1691 p2p_rx_p2p_action(p2p, sa, data, len, freq); 1692 break; 1693 case WLAN_PA_GAS_INITIAL_REQ: 1694 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq); 1695 break; 1696 case WLAN_PA_GAS_INITIAL_RESP: 1697 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq); 1698 break; 1699 case WLAN_PA_GAS_COMEBACK_REQ: 1700 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq); 1701 break; 1702 case WLAN_PA_GAS_COMEBACK_RESP: 1703 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq); 1704 break; 1705 } 1706} 1707 1708 1709void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa, 1710 const u8 *bssid, u8 category, 1711 const u8 *data, size_t len, int freq) 1712{ 1713 if (category == WLAN_ACTION_PUBLIC) { 1714 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq); 1715 return; 1716 } 1717 1718 if (category != WLAN_ACTION_VENDOR_SPECIFIC) 1719 return; 1720 1721 if (len < 4) 1722 return; 1723 1724 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1725 return; 1726 data += 4; 1727 len -= 4; 1728 1729 /* P2P action frame */ 1730 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa)); 1731 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len); 1732 1733 if (len < 1) 1734 return; 1735 switch (data[0]) { 1736 case P2P_NOA: 1737 p2p_dbg(p2p, "Received P2P Action - Notice of Absence"); 1738 /* TODO */ 1739 break; 1740 case P2P_PRESENCE_REQ: 1741 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq); 1742 break; 1743 case P2P_PRESENCE_RESP: 1744 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1); 1745 break; 1746 case P2P_GO_DISC_REQ: 1747 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq); 1748 break; 1749 default: 1750 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]); 1751 break; 1752 } 1753} 1754 1755 1756static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx) 1757{ 1758 struct p2p_data *p2p = eloop_ctx; 1759 if (p2p->go_neg_peer == NULL) 1760 return; 1761 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1762 p2p->go_neg_peer->status = P2P_SC_SUCCESS; 1763 p2p_connect_send(p2p, p2p->go_neg_peer); 1764} 1765 1766 1767static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx) 1768{ 1769 struct p2p_data *p2p = eloop_ctx; 1770 if (p2p->invite_peer == NULL) 1771 return; 1772 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1773 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr, 1774 p2p->invite_dev_pw_id); 1775} 1776 1777 1778static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr, 1779 const u8 *ie, size_t ie_len) 1780{ 1781 struct p2p_message msg; 1782 struct p2p_device *dev; 1783 1784 os_memset(&msg, 0, sizeof(msg)); 1785 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL) 1786 { 1787 p2p_parse_free(&msg); 1788 return; /* not a P2P probe */ 1789 } 1790 1791 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 1792 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 1793 != 0) { 1794 /* The Probe Request is not part of P2P Device Discovery. It is 1795 * not known whether the source address of the frame is the P2P 1796 * Device Address or P2P Interface Address. Do not add a new 1797 * peer entry based on this frames. 1798 */ 1799 p2p_parse_free(&msg); 1800 return; 1801 } 1802 1803 dev = p2p_get_device(p2p, addr); 1804 if (dev) { 1805 if (dev->country[0] == 0 && msg.listen_channel) 1806 os_memcpy(dev->country, msg.listen_channel, 3); 1807 os_get_reltime(&dev->last_seen); 1808 p2p_parse_free(&msg); 1809 return; /* already known */ 1810 } 1811 1812 dev = p2p_create_device(p2p, addr); 1813 if (dev == NULL) { 1814 p2p_parse_free(&msg); 1815 return; 1816 } 1817 1818 os_get_reltime(&dev->last_seen); 1819 dev->flags |= P2P_DEV_PROBE_REQ_ONLY; 1820 1821 if (msg.listen_channel) { 1822 os_memcpy(dev->country, msg.listen_channel, 3); 1823 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3], 1824 msg.listen_channel[4]); 1825 } 1826 1827 p2p_copy_wps_info(p2p, dev, 1, &msg); 1828 1829 if (msg.wfd_subelems) { 1830 wpabuf_free(dev->info.wfd_subelems); 1831 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 1832 } 1833 1834 p2p_parse_free(&msg); 1835 1836 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR 1837 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d", 1838 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab, 1839 dev->info.group_capab, dev->info.device_name, 1840 dev->listen_freq); 1841} 1842 1843 1844struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p, 1845 const u8 *addr, 1846 struct p2p_message *msg) 1847{ 1848 struct p2p_device *dev; 1849 1850 dev = p2p_get_device(p2p, addr); 1851 if (dev) { 1852 os_get_reltime(&dev->last_seen); 1853 return dev; /* already known */ 1854 } 1855 1856 dev = p2p_create_device(p2p, addr); 1857 if (dev == NULL) 1858 return NULL; 1859 1860 p2p_add_dev_info(p2p, addr, dev, msg); 1861 1862 return dev; 1863} 1864 1865 1866static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type) 1867{ 1868 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0) 1869 return 1; 1870 if (os_memcmp(dev_type, req_dev_type, 2) == 0 && 1871 WPA_GET_BE32(&req_dev_type[2]) == 0 && 1872 WPA_GET_BE16(&req_dev_type[6]) == 0) 1873 return 1; /* Category match with wildcard OUI/sub-category */ 1874 return 0; 1875} 1876 1877 1878int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[], 1879 size_t num_req_dev_type) 1880{ 1881 size_t i; 1882 for (i = 0; i < num_req_dev_type; i++) { 1883 if (dev_type_match(dev_type, req_dev_type[i])) 1884 return 1; 1885 } 1886 return 0; 1887} 1888 1889 1890/** 1891 * p2p_match_dev_type - Match local device type with requested type 1892 * @p2p: P2P module context from p2p_init() 1893 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) 1894 * Returns: 1 on match, 0 on mismatch 1895 * 1896 * This function can be used to match the Requested Device Type attribute in 1897 * WPS IE with the local device types for deciding whether to reply to a Probe 1898 * Request frame. 1899 */ 1900int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps) 1901{ 1902 struct wps_parse_attr attr; 1903 size_t i; 1904 1905 if (wps_parse_msg(wps, &attr)) 1906 return 1; /* assume no Requested Device Type attributes */ 1907 1908 if (attr.num_req_dev_type == 0) 1909 return 1; /* no Requested Device Type attributes -> match */ 1910 1911 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type, 1912 attr.num_req_dev_type)) 1913 return 1; /* Own Primary Device Type matches */ 1914 1915 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) 1916 if (dev_type_list_match(p2p->cfg->sec_dev_type[i], 1917 attr.req_dev_type, 1918 attr.num_req_dev_type)) 1919 return 1; /* Own Secondary Device Type matches */ 1920 1921 /* No matching device type found */ 1922 return 0; 1923} 1924 1925 1926struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p) 1927{ 1928 struct wpabuf *buf; 1929 u8 *len; 1930 int pw_id = -1; 1931 size_t extra = 0; 1932 1933#ifdef CONFIG_WIFI_DISPLAY 1934 if (p2p->wfd_ie_probe_resp) 1935 extra = wpabuf_len(p2p->wfd_ie_probe_resp); 1936#endif /* CONFIG_WIFI_DISPLAY */ 1937 1938 buf = wpabuf_alloc(1000 + extra); 1939 if (buf == NULL) 1940 return NULL; 1941 1942 if (p2p->go_neg_peer) { 1943 /* Advertise immediate availability of WPS credential */ 1944 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method); 1945 } 1946 1947 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) { 1948 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response"); 1949 wpabuf_free(buf); 1950 return NULL; 1951 } 1952 1953#ifdef CONFIG_WIFI_DISPLAY 1954 if (p2p->wfd_ie_probe_resp) 1955 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp); 1956#endif /* CONFIG_WIFI_DISPLAY */ 1957 1958 /* P2P IE */ 1959 len = p2p_buf_add_ie_hdr(buf); 1960 p2p_buf_add_capability(buf, p2p->dev_capab & 1961 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 1962 if (p2p->ext_listen_interval) 1963 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 1964 p2p->ext_listen_interval); 1965 p2p_buf_add_device_info(buf, p2p, NULL); 1966 p2p_buf_update_ie_hdr(buf, len); 1967 1968 return buf; 1969} 1970 1971 1972static enum p2p_probe_req_status 1973p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 1974 const u8 *bssid, const u8 *ie, size_t ie_len) 1975{ 1976 struct ieee802_11_elems elems; 1977 struct wpabuf *buf; 1978 struct ieee80211_mgmt *resp; 1979 struct p2p_message msg; 1980 struct wpabuf *ies; 1981 1982 if (!p2p->in_listen || !p2p->drv_in_listen) { 1983 /* not in Listen state - ignore Probe Request */ 1984 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request", 1985 p2p->in_listen, p2p->drv_in_listen); 1986 return P2P_PREQ_NOT_LISTEN; 1987 } 1988 1989 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) == 1990 ParseFailed) { 1991 /* Ignore invalid Probe Request frames */ 1992 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it"); 1993 return P2P_PREQ_MALFORMED; 1994 } 1995 1996 if (elems.p2p == NULL) { 1997 /* not a P2P probe - ignore it */ 1998 p2p_dbg(p2p, "Not a P2P probe - ignore it"); 1999 return P2P_PREQ_NOT_P2P; 2000 } 2001 2002 if (dst && !is_broadcast_ether_addr(dst) && 2003 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2004 /* Not sent to the broadcast address or our P2P Device Address 2005 */ 2006 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it", 2007 MAC2STR(dst)); 2008 return P2P_PREQ_NOT_PROCESSED; 2009 } 2010 2011 if (bssid && !is_broadcast_ether_addr(bssid)) { 2012 /* Not sent to the Wildcard BSSID */ 2013 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it", 2014 MAC2STR(bssid)); 2015 return P2P_PREQ_NOT_PROCESSED; 2016 } 2017 2018 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN || 2019 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) != 2020 0) { 2021 /* not using P2P Wildcard SSID - ignore */ 2022 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it"); 2023 return P2P_PREQ_NOT_PROCESSED; 2024 } 2025 2026 if (supp_rates_11b_only(&elems)) { 2027 /* Indicates support for 11b rates only */ 2028 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it"); 2029 return P2P_PREQ_NOT_P2P; 2030 } 2031 2032 os_memset(&msg, 0, sizeof(msg)); 2033 if (p2p_parse_ies(ie, ie_len, &msg) < 0) { 2034 /* Could not parse P2P attributes */ 2035 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it"); 2036 return P2P_PREQ_NOT_P2P; 2037 } 2038 2039 if (msg.device_id && 2040 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2041 /* Device ID did not match */ 2042 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it", 2043 MAC2STR(msg.device_id)); 2044 p2p_parse_free(&msg); 2045 return P2P_PREQ_NOT_PROCESSED; 2046 } 2047 2048 /* Check Requested Device Type match */ 2049 if (msg.wps_attributes && 2050 !p2p_match_dev_type(p2p, msg.wps_attributes)) { 2051 /* No match with Requested Device Type */ 2052 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it"); 2053 p2p_parse_free(&msg); 2054 return P2P_PREQ_NOT_PROCESSED; 2055 } 2056 p2p_parse_free(&msg); 2057 2058 if (!p2p->cfg->send_probe_resp) { 2059 /* Response generated elsewhere */ 2060 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response"); 2061 return P2P_PREQ_NOT_PROCESSED; 2062 } 2063 2064 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state"); 2065 2066 /* 2067 * We do not really have a specific BSS that this frame is advertising, 2068 * so build a frame that has some information in valid format. This is 2069 * really only used for discovery purposes, not to learn exact BSS 2070 * parameters. 2071 */ 2072 ies = p2p_build_probe_resp_ies(p2p); 2073 if (ies == NULL) 2074 return P2P_PREQ_NOT_PROCESSED; 2075 2076 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 2077 if (buf == NULL) { 2078 wpabuf_free(ies); 2079 return P2P_PREQ_NOT_PROCESSED; 2080 } 2081 2082 resp = NULL; 2083 resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp); 2084 2085 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 2086 (WLAN_FC_STYPE_PROBE_RESP << 4)); 2087 os_memcpy(resp->da, addr, ETH_ALEN); 2088 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN); 2089 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN); 2090 resp->u.probe_resp.beacon_int = host_to_le16(100); 2091 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 2092 resp->u.probe_resp.capab_info = 2093 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE | 2094 WLAN_CAPABILITY_PRIVACY | 2095 WLAN_CAPABILITY_SHORT_SLOT_TIME); 2096 2097 wpabuf_put_u8(buf, WLAN_EID_SSID); 2098 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN); 2099 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 2100 2101 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES); 2102 wpabuf_put_u8(buf, 8); 2103 wpabuf_put_u8(buf, (60 / 5) | 0x80); 2104 wpabuf_put_u8(buf, 90 / 5); 2105 wpabuf_put_u8(buf, (120 / 5) | 0x80); 2106 wpabuf_put_u8(buf, 180 / 5); 2107 wpabuf_put_u8(buf, (240 / 5) | 0x80); 2108 wpabuf_put_u8(buf, 360 / 5); 2109 wpabuf_put_u8(buf, 480 / 5); 2110 wpabuf_put_u8(buf, 540 / 5); 2111 2112 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS); 2113 wpabuf_put_u8(buf, 1); 2114 wpabuf_put_u8(buf, p2p->cfg->channel); 2115 2116 wpabuf_put_buf(buf, ies); 2117 wpabuf_free(ies); 2118 2119 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf); 2120 2121 wpabuf_free(buf); 2122 2123 return P2P_PREQ_NOT_PROCESSED; 2124} 2125 2126 2127enum p2p_probe_req_status 2128p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2129 const u8 *bssid, const u8 *ie, size_t ie_len) 2130{ 2131 enum p2p_probe_req_status res; 2132 2133 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len); 2134 2135 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len); 2136 2137 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) && 2138 p2p->go_neg_peer && 2139 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN) 2140 == 0 && 2141 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 2142 /* Received a Probe Request from GO Negotiation peer */ 2143 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout"); 2144 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2145 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL); 2146 return P2P_PREQ_PROCESSED; 2147 } 2148 2149 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) && 2150 p2p->invite_peer && 2151 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) && 2152 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN) 2153 == 0) { 2154 /* Received a Probe Request from Invite peer */ 2155 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout"); 2156 eloop_cancel_timeout(p2p_invite_start, p2p, NULL); 2157 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL); 2158 return P2P_PREQ_PROCESSED; 2159 } 2160 2161 return res; 2162} 2163 2164 2165static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid, 2166 u8 *buf, size_t len, struct wpabuf *p2p_ie) 2167{ 2168 struct wpabuf *tmp; 2169 u8 *lpos; 2170 size_t tmplen; 2171 int res; 2172 u8 group_capab; 2173 2174 if (p2p_ie == NULL) 2175 return 0; /* WLAN AP is not a P2P manager */ 2176 2177 /* 2178 * (Re)Association Request - P2P IE 2179 * P2P Capability attribute (shall be present) 2180 * P2P Interface attribute (present if concurrent device and 2181 * P2P Management is enabled) 2182 */ 2183 tmp = wpabuf_alloc(200); 2184 if (tmp == NULL) 2185 return -1; 2186 2187 lpos = p2p_buf_add_ie_hdr(tmp); 2188 group_capab = 0; 2189 if (p2p->num_groups > 0) { 2190 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; 2191 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2192 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) && 2193 p2p->cross_connect) 2194 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 2195 } 2196 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab); 2197 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2198 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED)) 2199 p2p_buf_add_p2p_interface(tmp, p2p); 2200 p2p_buf_update_ie_hdr(tmp, lpos); 2201 2202 tmplen = wpabuf_len(tmp); 2203 if (tmplen > len) 2204 res = -1; 2205 else { 2206 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2207 res = tmplen; 2208 } 2209 wpabuf_free(tmp); 2210 2211 return res; 2212} 2213 2214 2215int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf, 2216 size_t len, int p2p_group, struct wpabuf *p2p_ie) 2217{ 2218 struct wpabuf *tmp; 2219 u8 *lpos; 2220 struct p2p_device *peer; 2221 size_t tmplen; 2222 int res; 2223 size_t extra = 0; 2224 2225 if (!p2p_group) 2226 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie); 2227 2228#ifdef CONFIG_WIFI_DISPLAY 2229 if (p2p->wfd_ie_assoc_req) 2230 extra = wpabuf_len(p2p->wfd_ie_assoc_req); 2231#endif /* CONFIG_WIFI_DISPLAY */ 2232 2233 /* 2234 * (Re)Association Request - P2P IE 2235 * P2P Capability attribute (shall be present) 2236 * Extended Listen Timing (may be present) 2237 * P2P Device Info attribute (shall be present) 2238 */ 2239 tmp = wpabuf_alloc(200 + extra); 2240 if (tmp == NULL) 2241 return -1; 2242 2243#ifdef CONFIG_WIFI_DISPLAY 2244 if (p2p->wfd_ie_assoc_req) 2245 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req); 2246#endif /* CONFIG_WIFI_DISPLAY */ 2247 2248 peer = bssid ? p2p_get_device(p2p, bssid) : NULL; 2249 2250 lpos = p2p_buf_add_ie_hdr(tmp); 2251 p2p_buf_add_capability(tmp, p2p->dev_capab, 0); 2252 if (p2p->ext_listen_interval) 2253 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period, 2254 p2p->ext_listen_interval); 2255 p2p_buf_add_device_info(tmp, p2p, peer); 2256 p2p_buf_update_ie_hdr(tmp, lpos); 2257 2258 tmplen = wpabuf_len(tmp); 2259 if (tmplen > len) 2260 res = -1; 2261 else { 2262 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2263 res = tmplen; 2264 } 2265 wpabuf_free(tmp); 2266 2267 return res; 2268} 2269 2270 2271int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) 2272{ 2273 struct wpabuf *p2p_ie; 2274 int ret; 2275 2276 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); 2277 if (p2p_ie == NULL) 2278 return 0; 2279 2280 ret = p2p_attr_text(p2p_ie, buf, end); 2281 wpabuf_free(p2p_ie); 2282 return ret; 2283} 2284 2285 2286int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr) 2287{ 2288 struct p2p_message msg; 2289 2290 os_memset(&msg, 0, sizeof(msg)); 2291 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 2292 return -1; 2293 2294 if (msg.p2p_device_addr) { 2295 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); 2296 return 0; 2297 } else if (msg.device_id) { 2298 os_memcpy(dev_addr, msg.device_id, ETH_ALEN); 2299 return 0; 2300 } 2301 return -1; 2302} 2303 2304 2305int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr) 2306{ 2307 struct wpabuf *p2p_ie; 2308 int ret; 2309 2310 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 2311 P2P_IE_VENDOR_TYPE); 2312 if (p2p_ie == NULL) 2313 return -1; 2314 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr); 2315 wpabuf_free(p2p_ie); 2316 return ret; 2317} 2318 2319 2320static void p2p_clear_go_neg(struct p2p_data *p2p) 2321{ 2322 p2p->go_neg_peer = NULL; 2323 p2p_clear_timeout(p2p); 2324 p2p_set_state(p2p, P2P_IDLE); 2325} 2326 2327 2328void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr) 2329{ 2330 if (p2p->go_neg_peer == NULL) { 2331 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification"); 2332 return; /* No pending Group Formation */ 2333 } 2334 2335 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) != 2336 0) { 2337 p2p_dbg(p2p, "Ignore WPS registration success notification for " 2338 MACSTR " (GO Negotiation peer " MACSTR ")", 2339 MAC2STR(mac_addr), 2340 MAC2STR(p2p->go_neg_peer->intended_addr)); 2341 return; /* Ignore unexpected peer address */ 2342 } 2343 2344 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR, 2345 MAC2STR(mac_addr)); 2346 2347 p2p_clear_go_neg(p2p); 2348} 2349 2350 2351void p2p_group_formation_failed(struct p2p_data *p2p) 2352{ 2353 if (p2p->go_neg_peer == NULL) { 2354 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification"); 2355 return; /* No pending Group Formation */ 2356 } 2357 2358 p2p_dbg(p2p, "Group Formation failed with " MACSTR, 2359 MAC2STR(p2p->go_neg_peer->intended_addr)); 2360 2361 p2p_clear_go_neg(p2p); 2362} 2363 2364 2365struct p2p_data * p2p_init(const struct p2p_config *cfg) 2366{ 2367 struct p2p_data *p2p; 2368 2369 if (cfg->max_peers < 1) 2370 return NULL; 2371 2372 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg)); 2373 if (p2p == NULL) 2374 return NULL; 2375 p2p->cfg = (struct p2p_config *) (p2p + 1); 2376 os_memcpy(p2p->cfg, cfg, sizeof(*cfg)); 2377 if (cfg->dev_name) 2378 p2p->cfg->dev_name = os_strdup(cfg->dev_name); 2379 if (cfg->manufacturer) 2380 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer); 2381 if (cfg->model_name) 2382 p2p->cfg->model_name = os_strdup(cfg->model_name); 2383 if (cfg->model_number) 2384 p2p->cfg->model_number = os_strdup(cfg->model_number); 2385 if (cfg->serial_number) 2386 p2p->cfg->serial_number = os_strdup(cfg->serial_number); 2387 if (cfg->pref_chan) { 2388 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan * 2389 sizeof(struct p2p_channel)); 2390 if (p2p->cfg->pref_chan) { 2391 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan, 2392 cfg->num_pref_chan * 2393 sizeof(struct p2p_channel)); 2394 } else 2395 p2p->cfg->num_pref_chan = 0; 2396 } 2397 2398 p2p->min_disc_int = 1; 2399 p2p->max_disc_int = 3; 2400 p2p->max_disc_tu = -1; 2401 2402 os_get_random(&p2p->next_tie_breaker, 1); 2403 p2p->next_tie_breaker &= 0x01; 2404 if (cfg->sd_request) 2405 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 2406 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE; 2407 if (cfg->concurrent_operations) 2408 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER; 2409 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 2410 2411 dl_list_init(&p2p->devices); 2412 2413 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 2414 p2p_expiration_timeout, p2p, NULL); 2415 2416 p2p->go_timeout = 100; 2417 p2p->client_timeout = 20; 2418 p2p->num_p2p_sd_queries = 0; 2419 2420 p2p_dbg(p2p, "initialized"); 2421 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 2422 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 2423 2424 return p2p; 2425} 2426 2427 2428void p2p_deinit(struct p2p_data *p2p) 2429{ 2430#ifdef CONFIG_WIFI_DISPLAY 2431 wpabuf_free(p2p->wfd_ie_beacon); 2432 wpabuf_free(p2p->wfd_ie_probe_req); 2433 wpabuf_free(p2p->wfd_ie_probe_resp); 2434 wpabuf_free(p2p->wfd_ie_assoc_req); 2435 wpabuf_free(p2p->wfd_ie_invitation); 2436 wpabuf_free(p2p->wfd_ie_prov_disc_req); 2437 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 2438 wpabuf_free(p2p->wfd_ie_go_neg); 2439 wpabuf_free(p2p->wfd_dev_info); 2440 wpabuf_free(p2p->wfd_assoc_bssid); 2441 wpabuf_free(p2p->wfd_coupled_sink_info); 2442#endif /* CONFIG_WIFI_DISPLAY */ 2443 2444 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL); 2445 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 2446 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2447 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2448 p2p_flush(p2p); 2449 p2p_free_req_dev_types(p2p); 2450 os_free(p2p->cfg->dev_name); 2451 os_free(p2p->cfg->manufacturer); 2452 os_free(p2p->cfg->model_name); 2453 os_free(p2p->cfg->model_number); 2454 os_free(p2p->cfg->serial_number); 2455 os_free(p2p->cfg->pref_chan); 2456 os_free(p2p->groups); 2457 wpabuf_free(p2p->sd_resp); 2458 os_free(p2p->after_scan_tx); 2459 p2p_remove_wps_vendor_extensions(p2p); 2460 os_free(p2p->no_go_freq.range); 2461 os_free(p2p); 2462} 2463 2464 2465void p2p_flush(struct p2p_data *p2p) 2466{ 2467 struct p2p_device *dev, *prev; 2468 p2p_stop_find(p2p); 2469 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device, 2470 list) { 2471 dl_list_del(&dev->list); 2472 p2p_device_free(p2p, dev); 2473 } 2474 p2p_free_sd_queries(p2p); 2475 os_free(p2p->after_scan_tx); 2476 p2p->after_scan_tx = NULL; 2477} 2478 2479 2480int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr) 2481{ 2482 struct p2p_device *dev; 2483 2484 dev = p2p_get_device(p2p, addr); 2485 if (dev == NULL) 2486 return -1; 2487 2488 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr)); 2489 2490 if (p2p->go_neg_peer == dev) 2491 p2p->go_neg_peer = NULL; 2492 2493 dev->wps_method = WPS_NOT_READY; 2494 dev->oob_pw_id = 0; 2495 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 2496 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 2497 2498 /* Check if after_scan_tx is for this peer. If so free it */ 2499 if (p2p->after_scan_tx && 2500 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) { 2501 os_free(p2p->after_scan_tx); 2502 p2p->after_scan_tx = NULL; 2503 } 2504 2505 return 0; 2506} 2507 2508 2509int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name) 2510{ 2511 os_free(p2p->cfg->dev_name); 2512 if (dev_name) { 2513 p2p->cfg->dev_name = os_strdup(dev_name); 2514 if (p2p->cfg->dev_name == NULL) 2515 return -1; 2516 } else 2517 p2p->cfg->dev_name = NULL; 2518 return 0; 2519} 2520 2521 2522int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer) 2523{ 2524 os_free(p2p->cfg->manufacturer); 2525 p2p->cfg->manufacturer = NULL; 2526 if (manufacturer) { 2527 p2p->cfg->manufacturer = os_strdup(manufacturer); 2528 if (p2p->cfg->manufacturer == NULL) 2529 return -1; 2530 } 2531 2532 return 0; 2533} 2534 2535 2536int p2p_set_model_name(struct p2p_data *p2p, const char *model_name) 2537{ 2538 os_free(p2p->cfg->model_name); 2539 p2p->cfg->model_name = NULL; 2540 if (model_name) { 2541 p2p->cfg->model_name = os_strdup(model_name); 2542 if (p2p->cfg->model_name == NULL) 2543 return -1; 2544 } 2545 2546 return 0; 2547} 2548 2549 2550int p2p_set_model_number(struct p2p_data *p2p, const char *model_number) 2551{ 2552 os_free(p2p->cfg->model_number); 2553 p2p->cfg->model_number = NULL; 2554 if (model_number) { 2555 p2p->cfg->model_number = os_strdup(model_number); 2556 if (p2p->cfg->model_number == NULL) 2557 return -1; 2558 } 2559 2560 return 0; 2561} 2562 2563 2564int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number) 2565{ 2566 os_free(p2p->cfg->serial_number); 2567 p2p->cfg->serial_number = NULL; 2568 if (serial_number) { 2569 p2p->cfg->serial_number = os_strdup(serial_number); 2570 if (p2p->cfg->serial_number == NULL) 2571 return -1; 2572 } 2573 2574 return 0; 2575} 2576 2577 2578void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods) 2579{ 2580 p2p->cfg->config_methods = config_methods; 2581} 2582 2583 2584void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid) 2585{ 2586 os_memcpy(p2p->cfg->uuid, uuid, 16); 2587} 2588 2589 2590int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type) 2591{ 2592 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8); 2593 return 0; 2594} 2595 2596 2597int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8], 2598 size_t num_dev_types) 2599{ 2600 if (num_dev_types > P2P_SEC_DEVICE_TYPES) 2601 num_dev_types = P2P_SEC_DEVICE_TYPES; 2602 p2p->cfg->num_sec_dev_types = num_dev_types; 2603 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8); 2604 return 0; 2605} 2606 2607 2608void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p) 2609{ 2610 int i; 2611 2612 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2613 wpabuf_free(p2p->wps_vendor_ext[i]); 2614 p2p->wps_vendor_ext[i] = NULL; 2615 } 2616} 2617 2618 2619int p2p_add_wps_vendor_extension(struct p2p_data *p2p, 2620 const struct wpabuf *vendor_ext) 2621{ 2622 int i; 2623 2624 if (vendor_ext == NULL) 2625 return -1; 2626 2627 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2628 if (p2p->wps_vendor_ext[i] == NULL) 2629 break; 2630 } 2631 if (i >= P2P_MAX_WPS_VENDOR_EXT) 2632 return -1; 2633 2634 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext); 2635 if (p2p->wps_vendor_ext[i] == NULL) 2636 return -1; 2637 2638 return 0; 2639} 2640 2641 2642int p2p_set_country(struct p2p_data *p2p, const char *country) 2643{ 2644 os_memcpy(p2p->cfg->country, country, 3); 2645 return 0; 2646} 2647 2648 2649void p2p_continue_find(struct p2p_data *p2p) 2650{ 2651 struct p2p_device *dev; 2652 p2p_set_state(p2p, P2P_SEARCH); 2653 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2654 if (dev->sd_pending_bcast_queries == 0) { 2655 /* Initialize with total number of registered broadcast 2656 * SD queries. */ 2657 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries; 2658 } 2659 2660 if (p2p_start_sd(p2p, dev) == 0) 2661 return; 2662 if (dev->req_config_methods && 2663 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) { 2664 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 2665 MACSTR " (config methods 0x%x)", 2666 MAC2STR(dev->info.p2p_device_addr), 2667 dev->req_config_methods); 2668 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0) 2669 return; 2670 } 2671 } 2672 2673 p2p_listen_in_find(p2p, 1); 2674} 2675 2676 2677static void p2p_sd_cb(struct p2p_data *p2p, int success) 2678{ 2679 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d", 2680 success); 2681 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2682 2683 if (!success) { 2684 p2p->sd_peer = NULL; 2685 p2p_continue_find(p2p); 2686 return; 2687 } 2688 2689 if (p2p->sd_peer == NULL) { 2690 p2p_dbg(p2p, "No SD peer entry known"); 2691 p2p_continue_find(p2p); 2692 return; 2693 } 2694 2695 /* Wait for response from the peer */ 2696 p2p_set_state(p2p, P2P_SD_DURING_FIND); 2697 p2p_set_timeout(p2p, 0, 200000); 2698} 2699 2700 2701/** 2702 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state 2703 * @p2p: P2P module context from p2p_init() 2704 */ 2705static void p2p_retry_pd(struct p2p_data *p2p) 2706{ 2707 struct p2p_device *dev; 2708 2709 if (p2p->state != P2P_IDLE) 2710 return; 2711 2712 /* 2713 * Retry the prov disc req attempt only for the peer that the user had 2714 * requested. 2715 */ 2716 2717 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2718 if (os_memcmp(p2p->pending_pd_devaddr, 2719 dev->info.p2p_device_addr, ETH_ALEN) != 0) 2720 continue; 2721 if (!dev->req_config_methods) 2722 continue; 2723 2724 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 2725 MACSTR " (config methods 0x%x)", 2726 MAC2STR(dev->info.p2p_device_addr), 2727 dev->req_config_methods); 2728 p2p_send_prov_disc_req(p2p, dev, 2729 dev->flags & P2P_DEV_PD_FOR_JOIN, 2730 p2p->pd_force_freq); 2731 return; 2732 } 2733} 2734 2735 2736static void p2p_prov_disc_cb(struct p2p_data *p2p, int success) 2737{ 2738 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d", 2739 success); 2740 2741 /* 2742 * Postpone resetting the pending action state till after we actually 2743 * time out. This allows us to take some action like notifying any 2744 * interested parties about no response to the request. 2745 * 2746 * When the timer (below) goes off we check in IDLE, SEARCH, or 2747 * LISTEN_ONLY state, which are the only allowed states to issue a PD 2748 * requests in, if this was still pending and then raise notification. 2749 */ 2750 2751 if (!success) { 2752 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2753 2754 if (p2p->user_initiated_pd && 2755 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY)) 2756 { 2757 /* Retry request from timeout to avoid busy loops */ 2758 p2p->pending_action_state = P2P_PENDING_PD; 2759 p2p_set_timeout(p2p, 0, 50000); 2760 } else if (p2p->state != P2P_IDLE) 2761 p2p_continue_find(p2p); 2762 else if (p2p->user_initiated_pd) { 2763 p2p->pending_action_state = P2P_PENDING_PD; 2764 p2p_set_timeout(p2p, 0, 300000); 2765 } 2766 return; 2767 } 2768 2769 /* 2770 * This postponing, of resetting pending_action_state, needs to be 2771 * done only for user initiated PD requests and not internal ones. 2772 */ 2773 if (p2p->user_initiated_pd) 2774 p2p->pending_action_state = P2P_PENDING_PD; 2775 else 2776 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2777 2778 /* Wait for response from the peer */ 2779 if (p2p->state == P2P_SEARCH) 2780 p2p_set_state(p2p, P2P_PD_DURING_FIND); 2781 p2p_set_timeout(p2p, 0, 200000); 2782} 2783 2784 2785int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq, 2786 struct os_reltime *rx_time, int level, const u8 *ies, 2787 size_t ies_len) 2788{ 2789 if (os_reltime_before(rx_time, &p2p->find_start)) { 2790 /* 2791 * The driver may have cached (e.g., in cfg80211 BSS table) the 2792 * scan results for relatively long time. To avoid reporting 2793 * stale information, update P2P peers only based on results 2794 * that have based on frames received after the last p2p_find 2795 * operation was started. 2796 */ 2797 p2p_dbg(p2p, "Ignore old scan result for " MACSTR 2798 " (rx_time=%u.%06u)", 2799 MAC2STR(bssid), (unsigned int) rx_time->sec, 2800 (unsigned int) rx_time->usec); 2801 return 0; 2802 } 2803 2804 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1); 2805 2806 return 0; 2807} 2808 2809 2810void p2p_scan_res_handled(struct p2p_data *p2p) 2811{ 2812 if (!p2p->p2p_scan_running) { 2813 p2p_dbg(p2p, "p2p_scan was not running, but scan results received"); 2814 } 2815 p2p->p2p_scan_running = 0; 2816 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2817 2818 if (p2p_run_after_scan(p2p)) 2819 return; 2820 if (p2p->state == P2P_SEARCH) 2821 p2p_continue_find(p2p); 2822} 2823 2824 2825void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id) 2826{ 2827 u8 *len; 2828 2829#ifdef CONFIG_WIFI_DISPLAY 2830 if (p2p->wfd_ie_probe_req) 2831 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req); 2832#endif /* CONFIG_WIFI_DISPLAY */ 2833 2834 len = p2p_buf_add_ie_hdr(ies); 2835 p2p_buf_add_capability(ies, p2p->dev_capab & 2836 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2837 if (dev_id) 2838 p2p_buf_add_device_id(ies, dev_id); 2839 if (p2p->cfg->reg_class && p2p->cfg->channel) 2840 p2p_buf_add_listen_channel(ies, p2p->cfg->country, 2841 p2p->cfg->reg_class, 2842 p2p->cfg->channel); 2843 if (p2p->ext_listen_interval) 2844 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period, 2845 p2p->ext_listen_interval); 2846 /* TODO: p2p_buf_add_operating_channel() if GO */ 2847 p2p_buf_update_ie_hdr(ies, len); 2848} 2849 2850 2851size_t p2p_scan_ie_buf_len(struct p2p_data *p2p) 2852{ 2853 size_t len = 100; 2854 2855#ifdef CONFIG_WIFI_DISPLAY 2856 if (p2p && p2p->wfd_ie_probe_req) 2857 len += wpabuf_len(p2p->wfd_ie_probe_req); 2858#endif /* CONFIG_WIFI_DISPLAY */ 2859 2860 return len; 2861} 2862 2863 2864int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end) 2865{ 2866 return p2p_attr_text(p2p_ie, buf, end); 2867} 2868 2869 2870static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success) 2871{ 2872 struct p2p_device *dev = p2p->go_neg_peer; 2873 int timeout; 2874 2875 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success); 2876 2877 if (dev == NULL) { 2878 p2p_dbg(p2p, "No pending GO Negotiation"); 2879 return; 2880 } 2881 2882 if (success) { 2883 if (dev->flags & P2P_DEV_USER_REJECTED) { 2884 p2p_set_state(p2p, P2P_IDLE); 2885 return; 2886 } 2887 } else if (dev->go_neg_req_sent) { 2888 /* Cancel the increment from p2p_connect_send() on failure */ 2889 dev->go_neg_req_sent--; 2890 } 2891 2892 if (!success && 2893 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) && 2894 !is_zero_ether_addr(dev->member_in_go_dev)) { 2895 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO", 2896 MAC2STR(dev->info.p2p_device_addr)); 2897 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 2898 p2p_send_dev_disc_req(p2p, dev); 2899 return; 2900 } 2901 2902 /* 2903 * Use P2P find, if needed, to find the other device from its listen 2904 * channel. 2905 */ 2906 p2p_set_state(p2p, P2P_CONNECT); 2907 timeout = success ? 500000 : 100000; 2908 if (!success && p2p->go_neg_peer && 2909 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) { 2910 unsigned int r; 2911 /* 2912 * Peer is expected to wait our response and we will skip the 2913 * listen phase. Add some randomness to the wait time here to 2914 * make it less likely to hit cases where we could end up in 2915 * sync with peer not listening. 2916 */ 2917 os_get_random((u8 *) &r, sizeof(r)); 2918 timeout += r % 100000; 2919 } 2920 p2p_set_timeout(p2p, 0, timeout); 2921} 2922 2923 2924static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success) 2925{ 2926 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d", 2927 success); 2928 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) { 2929 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore"); 2930 return; 2931 } 2932 p2p_set_state(p2p, P2P_CONNECT); 2933 p2p_set_timeout(p2p, 0, 500000); 2934} 2935 2936 2937static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success, 2938 const u8 *addr) 2939{ 2940 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success); 2941 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) { 2942 p2p_go_neg_failed(p2p, p2p->go_neg_peer, 2943 p2p->go_neg_peer->status); 2944 } else if (success) { 2945 struct p2p_device *dev; 2946 dev = p2p_get_device(p2p, addr); 2947 if (dev && 2948 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) 2949 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE; 2950 } 2951} 2952 2953 2954static void p2p_go_neg_conf_cb(struct p2p_data *p2p, 2955 enum p2p_send_action_result result) 2956{ 2957 struct p2p_device *dev; 2958 2959 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result); 2960 if (result == P2P_SEND_ACTION_FAILED) { 2961 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 2962 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 2963 return; 2964 } 2965 2966 dev = p2p->go_neg_peer; 2967 2968 if (result == P2P_SEND_ACTION_NO_ACK) { 2969 /* 2970 * Retry GO Negotiation Confirmation 2971 * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive 2972 * ACK for confirmation. 2973 */ 2974 if (dev && dev->go_neg_conf && 2975 dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) { 2976 p2p_dbg(p2p, "GO Negotiation Confirm retry %d", 2977 dev->go_neg_conf_sent); 2978 p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM; 2979 if (p2p_send_action(p2p, dev->go_neg_conf_freq, 2980 dev->info.p2p_device_addr, 2981 p2p->cfg->dev_addr, 2982 dev->info.p2p_device_addr, 2983 wpabuf_head(dev->go_neg_conf), 2984 wpabuf_len(dev->go_neg_conf), 0) >= 2985 0) { 2986 dev->go_neg_conf_sent++; 2987 return; 2988 } 2989 p2p_dbg(p2p, "Failed to re-send Action frame"); 2990 2991 /* 2992 * Continue with the assumption that the first attempt 2993 * went through and just the ACK frame was lost. 2994 */ 2995 } 2996 2997 /* 2998 * It looks like the TX status for GO Negotiation Confirm is 2999 * often showing failure even when the peer has actually 3000 * received the frame. Since the peer may change channels 3001 * immediately after having received the frame, we may not see 3002 * an Ack for retries, so just dropping a single frame may 3003 * trigger this. To allow the group formation to succeed if the 3004 * peer did indeed receive the frame, continue regardless of 3005 * the TX status. 3006 */ 3007 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported"); 3008 } 3009 3010 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3011 3012 if (dev == NULL) 3013 return; 3014 3015 p2p_go_complete(p2p, dev); 3016} 3017 3018 3019void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 3020 const u8 *src, const u8 *bssid, 3021 enum p2p_send_action_result result) 3022{ 3023 enum p2p_pending_action_state state; 3024 int success; 3025 3026 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR 3027 " src=" MACSTR " bssid=" MACSTR " result=%d", 3028 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), 3029 MAC2STR(bssid), result); 3030 success = result == P2P_SEND_ACTION_SUCCESS; 3031 state = p2p->pending_action_state; 3032 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3033 switch (state) { 3034 case P2P_NO_PENDING_ACTION: 3035 if (p2p->send_action_in_progress) { 3036 p2p->send_action_in_progress = 0; 3037 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3038 } 3039 if (p2p->after_scan_tx_in_progress) { 3040 p2p->after_scan_tx_in_progress = 0; 3041 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING && 3042 p2p_run_after_scan(p2p)) 3043 break; 3044 if (p2p->state == P2P_SEARCH) { 3045 p2p_dbg(p2p, "Continue find after after_scan_tx completion"); 3046 p2p_continue_find(p2p); 3047 } 3048 } 3049 break; 3050 case P2P_PENDING_GO_NEG_REQUEST: 3051 p2p_go_neg_req_cb(p2p, success); 3052 break; 3053 case P2P_PENDING_GO_NEG_RESPONSE: 3054 p2p_go_neg_resp_cb(p2p, success); 3055 break; 3056 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE: 3057 p2p_go_neg_resp_failure_cb(p2p, success, dst); 3058 break; 3059 case P2P_PENDING_GO_NEG_CONFIRM: 3060 p2p_go_neg_conf_cb(p2p, result); 3061 break; 3062 case P2P_PENDING_SD: 3063 p2p_sd_cb(p2p, success); 3064 break; 3065 case P2P_PENDING_PD: 3066 p2p_prov_disc_cb(p2p, success); 3067 break; 3068 case P2P_PENDING_INVITATION_REQUEST: 3069 p2p_invitation_req_cb(p2p, success); 3070 break; 3071 case P2P_PENDING_INVITATION_RESPONSE: 3072 p2p_invitation_resp_cb(p2p, success); 3073 break; 3074 case P2P_PENDING_DEV_DISC_REQUEST: 3075 p2p_dev_disc_req_cb(p2p, success); 3076 break; 3077 case P2P_PENDING_DEV_DISC_RESPONSE: 3078 p2p_dev_disc_resp_cb(p2p, success); 3079 break; 3080 case P2P_PENDING_GO_DISC_REQ: 3081 p2p_go_disc_req_cb(p2p, success); 3082 break; 3083 } 3084 3085 p2p->after_scan_tx_in_progress = 0; 3086} 3087 3088 3089void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq, 3090 unsigned int duration) 3091{ 3092 if (freq == p2p->pending_client_disc_freq) { 3093 p2p_dbg(p2p, "Client discoverability remain-awake completed"); 3094 p2p->pending_client_disc_freq = 0; 3095 return; 3096 } 3097 3098 if (freq != p2p->pending_listen_freq) { 3099 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)", 3100 freq, duration, p2p->pending_listen_freq); 3101 return; 3102 } 3103 3104 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback", 3105 p2p->pending_listen_sec, p2p->pending_listen_usec, 3106 p2p->pending_listen_freq); 3107 p2p->in_listen = 1; 3108 p2p->drv_in_listen = freq; 3109 if (p2p->pending_listen_sec || p2p->pending_listen_usec) { 3110 /* 3111 * Add 20 msec extra wait to avoid race condition with driver 3112 * remain-on-channel end event, i.e., give driver more time to 3113 * complete the operation before our timeout expires. 3114 */ 3115 p2p_set_timeout(p2p, p2p->pending_listen_sec, 3116 p2p->pending_listen_usec + 20000); 3117 } 3118 3119 p2p->pending_listen_freq = 0; 3120} 3121 3122 3123int p2p_listen_end(struct p2p_data *p2p, unsigned int freq) 3124{ 3125 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq); 3126 p2p->drv_in_listen = 0; 3127 if (p2p->in_listen) 3128 return 0; /* Internal timeout will trigger the next step */ 3129 3130 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) { 3131 if (p2p->go_neg_peer->connect_reqs >= 120) { 3132 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3133 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3134 return 0; 3135 } 3136 3137 p2p_set_state(p2p, P2P_CONNECT); 3138 p2p_connect_send(p2p, p2p->go_neg_peer); 3139 return 1; 3140 } else if (p2p->state == P2P_SEARCH) { 3141 if (p2p->p2p_scan_running) { 3142 /* 3143 * Search is already in progress. This can happen if 3144 * an Action frame RX is reported immediately after 3145 * the end of a remain-on-channel operation and the 3146 * response frame to that is sent using an offchannel 3147 * operation while in p2p_find. Avoid an attempt to 3148 * restart a scan here. 3149 */ 3150 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one"); 3151 return 1; 3152 } 3153 if (p2p->pending_listen_freq) { 3154 /* 3155 * Better wait a bit if the driver is unable to start 3156 * offchannel operation for some reason. p2p_search() 3157 * will be started from internal timeout. 3158 */ 3159 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop"); 3160 p2p_set_timeout(p2p, 0, 100000); 3161 return 1; 3162 } 3163 if (p2p->search_delay) { 3164 p2p_dbg(p2p, "Delay search operation by %u ms", 3165 p2p->search_delay); 3166 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3167 (p2p->search_delay % 1000) * 1000); 3168 return 1; 3169 } 3170 p2p_search(p2p); 3171 return 1; 3172 } 3173 3174 return 0; 3175} 3176 3177 3178static void p2p_timeout_connect(struct p2p_data *p2p) 3179{ 3180 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3181 if (p2p->go_neg_peer && 3182 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 3183 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed"); 3184 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3185 return; 3186 } 3187 if (p2p->go_neg_peer && 3188 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) && 3189 p2p->go_neg_peer->connect_reqs < 120) { 3190 p2p_dbg(p2p, "Peer expected to wait our response - skip listen"); 3191 p2p_connect_send(p2p, p2p->go_neg_peer); 3192 return; 3193 } 3194 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) { 3195 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)"); 3196 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3197 p2p_set_timeout(p2p, 0, 30000); 3198 return; 3199 } 3200 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3201 p2p_listen_in_find(p2p, 0); 3202} 3203 3204 3205static void p2p_timeout_connect_listen(struct p2p_data *p2p) 3206{ 3207 if (p2p->go_neg_peer) { 3208 if (p2p->drv_in_listen) { 3209 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete"); 3210 return; 3211 } 3212 3213 if (p2p->go_neg_peer->connect_reqs >= 120) { 3214 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3215 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3216 return; 3217 } 3218 3219 p2p_set_state(p2p, P2P_CONNECT); 3220 p2p_connect_send(p2p, p2p->go_neg_peer); 3221 } else 3222 p2p_set_state(p2p, P2P_IDLE); 3223} 3224 3225 3226static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p) 3227{ 3228 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 3229 3230 if (p2p->cfg->is_concurrent_session_active && 3231 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx)) 3232 p2p_set_timeout(p2p, 0, 500000); 3233 else 3234 p2p_set_timeout(p2p, 0, 200000); 3235} 3236 3237 3238static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p) 3239{ 3240 struct p2p_device *dev = p2p->go_neg_peer; 3241 3242 if (dev == NULL) { 3243 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait"); 3244 return; 3245 } 3246 3247 dev->wait_count++; 3248 if (dev->wait_count >= 120) { 3249 p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation"); 3250 p2p_go_neg_failed(p2p, dev, -1); 3251 return; 3252 } 3253 3254 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation"); 3255 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT); 3256 p2p_listen_in_find(p2p, 0); 3257} 3258 3259 3260static void p2p_timeout_sd_during_find(struct p2p_data *p2p) 3261{ 3262 p2p_dbg(p2p, "Service Discovery Query timeout"); 3263 if (p2p->sd_peer) { 3264 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3265 p2p->sd_peer = NULL; 3266 } 3267 p2p_continue_find(p2p); 3268} 3269 3270 3271static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p) 3272{ 3273 p2p_dbg(p2p, "Provision Discovery Request timeout"); 3274 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3275 p2p_continue_find(p2p); 3276} 3277 3278 3279static void p2p_timeout_prov_disc_req(struct p2p_data *p2p) 3280{ 3281 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3282 3283 /* 3284 * For user initiated PD requests that we have not gotten any responses 3285 * for while in IDLE state, we retry them a couple of times before 3286 * giving up. 3287 */ 3288 if (!p2p->user_initiated_pd) 3289 return; 3290 3291 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout"); 3292 3293 if (p2p->pd_retries) { 3294 p2p->pd_retries--; 3295 p2p_retry_pd(p2p); 3296 } else { 3297 struct p2p_device *dev; 3298 int for_join = 0; 3299 3300 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3301 if (os_memcmp(p2p->pending_pd_devaddr, 3302 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3303 continue; 3304 if (dev->req_config_methods && 3305 (dev->flags & P2P_DEV_PD_FOR_JOIN)) 3306 for_join = 1; 3307 } 3308 3309 if (p2p->cfg->prov_disc_fail) 3310 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, 3311 p2p->pending_pd_devaddr, 3312 for_join ? 3313 P2P_PROV_DISC_TIMEOUT_JOIN : 3314 P2P_PROV_DISC_TIMEOUT); 3315 p2p_reset_pending_pd(p2p); 3316 } 3317} 3318 3319 3320static void p2p_timeout_invite(struct p2p_data *p2p) 3321{ 3322 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3323 p2p_set_state(p2p, P2P_INVITE_LISTEN); 3324 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 3325 /* 3326 * Better remain on operating channel instead of listen channel 3327 * when running a group. 3328 */ 3329 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel"); 3330 p2p_set_timeout(p2p, 0, 100000); 3331 return; 3332 } 3333 p2p_listen_in_find(p2p, 0); 3334} 3335 3336 3337static void p2p_timeout_invite_listen(struct p2p_data *p2p) 3338{ 3339 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) { 3340 p2p_set_state(p2p, P2P_INVITE); 3341 p2p_invite_send(p2p, p2p->invite_peer, 3342 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id); 3343 } else { 3344 if (p2p->invite_peer) { 3345 p2p_dbg(p2p, "Invitation Request retry limit reached"); 3346 if (p2p->cfg->invitation_result) 3347 p2p->cfg->invitation_result( 3348 p2p->cfg->cb_ctx, -1, NULL, NULL, 3349 p2p->invite_peer->info.p2p_device_addr, 3350 0, 0); 3351 } 3352 p2p_set_state(p2p, P2P_IDLE); 3353 } 3354} 3355 3356 3357static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx) 3358{ 3359 struct p2p_data *p2p = eloop_ctx; 3360 3361 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state)); 3362 3363 p2p->in_listen = 0; 3364 3365 switch (p2p->state) { 3366 case P2P_IDLE: 3367 /* Check if we timed out waiting for PD req */ 3368 if (p2p->pending_action_state == P2P_PENDING_PD) 3369 p2p_timeout_prov_disc_req(p2p); 3370 break; 3371 case P2P_SEARCH: 3372 /* Check if we timed out waiting for PD req */ 3373 if (p2p->pending_action_state == P2P_PENDING_PD) 3374 p2p_timeout_prov_disc_req(p2p); 3375 if (p2p->search_delay && !p2p->in_search_delay) { 3376 p2p_dbg(p2p, "Delay search operation by %u ms", 3377 p2p->search_delay); 3378 p2p->in_search_delay = 1; 3379 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3380 (p2p->search_delay % 1000) * 1000); 3381 break; 3382 } 3383 p2p->in_search_delay = 0; 3384 p2p_search(p2p); 3385 break; 3386 case P2P_CONNECT: 3387 p2p_timeout_connect(p2p); 3388 break; 3389 case P2P_CONNECT_LISTEN: 3390 p2p_timeout_connect_listen(p2p); 3391 break; 3392 case P2P_GO_NEG: 3393 break; 3394 case P2P_LISTEN_ONLY: 3395 /* Check if we timed out waiting for PD req */ 3396 if (p2p->pending_action_state == P2P_PENDING_PD) 3397 p2p_timeout_prov_disc_req(p2p); 3398 3399 if (p2p->ext_listen_only) { 3400 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed"); 3401 p2p->ext_listen_only = 0; 3402 p2p_set_state(p2p, P2P_IDLE); 3403 } 3404 break; 3405 case P2P_WAIT_PEER_CONNECT: 3406 p2p_timeout_wait_peer_connect(p2p); 3407 break; 3408 case P2P_WAIT_PEER_IDLE: 3409 p2p_timeout_wait_peer_idle(p2p); 3410 break; 3411 case P2P_SD_DURING_FIND: 3412 p2p_timeout_sd_during_find(p2p); 3413 break; 3414 case P2P_PROVISIONING: 3415 break; 3416 case P2P_PD_DURING_FIND: 3417 p2p_timeout_prov_disc_during_find(p2p); 3418 break; 3419 case P2P_INVITE: 3420 p2p_timeout_invite(p2p); 3421 break; 3422 case P2P_INVITE_LISTEN: 3423 p2p_timeout_invite_listen(p2p); 3424 break; 3425 } 3426} 3427 3428 3429int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr) 3430{ 3431 struct p2p_device *dev; 3432 3433 dev = p2p_get_device(p2p, peer_addr); 3434 p2p_dbg(p2p, "Local request to reject connection attempts by peer " 3435 MACSTR, MAC2STR(peer_addr)); 3436 if (dev == NULL) { 3437 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr)); 3438 return -1; 3439 } 3440 dev->status = P2P_SC_FAIL_REJECTED_BY_USER; 3441 dev->flags |= P2P_DEV_USER_REJECTED; 3442 return 0; 3443} 3444 3445 3446const char * p2p_wps_method_text(enum p2p_wps_method method) 3447{ 3448 switch (method) { 3449 case WPS_NOT_READY: 3450 return "not-ready"; 3451 case WPS_PIN_DISPLAY: 3452 return "Display"; 3453 case WPS_PIN_KEYPAD: 3454 return "Keypad"; 3455 case WPS_PBC: 3456 return "PBC"; 3457 case WPS_NFC: 3458 return "NFC"; 3459 } 3460 3461 return "??"; 3462} 3463 3464 3465static const char * p2p_go_state_text(enum p2p_go_state go_state) 3466{ 3467 switch (go_state) { 3468 case UNKNOWN_GO: 3469 return "unknown"; 3470 case LOCAL_GO: 3471 return "local"; 3472 case REMOTE_GO: 3473 return "remote"; 3474 } 3475 3476 return "??"; 3477} 3478 3479 3480const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p, 3481 const u8 *addr, int next) 3482{ 3483 struct p2p_device *dev; 3484 3485 if (addr) 3486 dev = p2p_get_device(p2p, addr); 3487 else 3488 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 3489 3490 if (dev && next) { 3491 dev = dl_list_first(&dev->list, struct p2p_device, list); 3492 if (&dev->list == &p2p->devices) 3493 dev = NULL; 3494 } 3495 3496 if (dev == NULL) 3497 return NULL; 3498 3499 return &dev->info; 3500} 3501 3502 3503int p2p_get_peer_info_txt(const struct p2p_peer_info *info, 3504 char *buf, size_t buflen) 3505{ 3506 struct p2p_device *dev; 3507 int res; 3508 char *pos, *end; 3509 struct os_reltime now; 3510 3511 if (info == NULL) 3512 return -1; 3513 3514 dev = (struct p2p_device *) (((u8 *) info) - 3515 offsetof(struct p2p_device, info)); 3516 3517 pos = buf; 3518 end = buf + buflen; 3519 3520 os_get_reltime(&now); 3521 res = os_snprintf(pos, end - pos, 3522 "age=%d\n" 3523 "listen_freq=%d\n" 3524 "wps_method=%s\n" 3525 "interface_addr=" MACSTR "\n" 3526 "member_in_go_dev=" MACSTR "\n" 3527 "member_in_go_iface=" MACSTR "\n" 3528 "go_neg_req_sent=%d\n" 3529 "go_state=%s\n" 3530 "dialog_token=%u\n" 3531 "intended_addr=" MACSTR "\n" 3532 "country=%c%c\n" 3533 "oper_freq=%d\n" 3534 "req_config_methods=0x%x\n" 3535 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n" 3536 "status=%d\n" 3537 "wait_count=%u\n" 3538 "invitation_reqs=%u\n", 3539 (int) (now.sec - dev->last_seen.sec), 3540 dev->listen_freq, 3541 p2p_wps_method_text(dev->wps_method), 3542 MAC2STR(dev->interface_addr), 3543 MAC2STR(dev->member_in_go_dev), 3544 MAC2STR(dev->member_in_go_iface), 3545 dev->go_neg_req_sent, 3546 p2p_go_state_text(dev->go_state), 3547 dev->dialog_token, 3548 MAC2STR(dev->intended_addr), 3549 dev->country[0] ? dev->country[0] : '_', 3550 dev->country[1] ? dev->country[1] : '_', 3551 dev->oper_freq, 3552 dev->req_config_methods, 3553 dev->flags & P2P_DEV_PROBE_REQ_ONLY ? 3554 "[PROBE_REQ_ONLY]" : "", 3555 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "", 3556 dev->flags & P2P_DEV_NOT_YET_READY ? 3557 "[NOT_YET_READY]" : "", 3558 dev->flags & P2P_DEV_PD_PEER_DISPLAY ? 3559 "[PD_PEER_DISPLAY]" : "", 3560 dev->flags & P2P_DEV_PD_PEER_KEYPAD ? 3561 "[PD_PEER_KEYPAD]" : "", 3562 dev->flags & P2P_DEV_USER_REJECTED ? 3563 "[USER_REJECTED]" : "", 3564 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ? 3565 "[PEER_WAITING_RESPONSE]" : "", 3566 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ? 3567 "[PREFER_PERSISTENT_GROUP]" : "", 3568 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ? 3569 "[WAIT_GO_NEG_RESPONSE]" : "", 3570 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ? 3571 "[WAIT_GO_NEG_CONFIRM]" : "", 3572 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ? 3573 "[GROUP_CLIENT_ONLY]" : "", 3574 dev->flags & P2P_DEV_FORCE_FREQ ? 3575 "[FORCE_FREQ]" : "", 3576 dev->flags & P2P_DEV_PD_FOR_JOIN ? 3577 "[PD_FOR_JOIN]" : "", 3578 dev->status, 3579 dev->wait_count, 3580 dev->invitation_reqs); 3581 if (res < 0 || res >= end - pos) 3582 return pos - buf; 3583 pos += res; 3584 3585 if (dev->ext_listen_period) { 3586 res = os_snprintf(pos, end - pos, 3587 "ext_listen_period=%u\n" 3588 "ext_listen_interval=%u\n", 3589 dev->ext_listen_period, 3590 dev->ext_listen_interval); 3591 if (res < 0 || res >= end - pos) 3592 return pos - buf; 3593 pos += res; 3594 } 3595 3596 if (dev->oper_ssid_len) { 3597 res = os_snprintf(pos, end - pos, 3598 "oper_ssid=%s\n", 3599 wpa_ssid_txt(dev->oper_ssid, 3600 dev->oper_ssid_len)); 3601 if (res < 0 || res >= end - pos) 3602 return pos - buf; 3603 pos += res; 3604 } 3605 3606#ifdef CONFIG_WIFI_DISPLAY 3607 if (dev->info.wfd_subelems) { 3608 res = os_snprintf(pos, end - pos, "wfd_subelems="); 3609 if (res < 0 || res >= end - pos) 3610 return pos - buf; 3611 pos += res; 3612 3613 pos += wpa_snprintf_hex(pos, end - pos, 3614 wpabuf_head(dev->info.wfd_subelems), 3615 wpabuf_len(dev->info.wfd_subelems)); 3616 3617 res = os_snprintf(pos, end - pos, "\n"); 3618 if (res < 0 || res >= end - pos) 3619 return pos - buf; 3620 pos += res; 3621 } 3622#endif /* CONFIG_WIFI_DISPLAY */ 3623 3624 return pos - buf; 3625} 3626 3627 3628int p2p_peer_known(struct p2p_data *p2p, const u8 *addr) 3629{ 3630 return p2p_get_device(p2p, addr) != NULL; 3631} 3632 3633 3634void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled) 3635{ 3636 if (enabled) { 3637 p2p_dbg(p2p, "Client discoverability enabled"); 3638 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3639 } else { 3640 p2p_dbg(p2p, "Client discoverability disabled"); 3641 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3642 } 3643} 3644 3645 3646static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1, 3647 u32 duration2, u32 interval2) 3648{ 3649 struct wpabuf *req; 3650 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL; 3651 u8 *len; 3652 3653 req = wpabuf_alloc(100); 3654 if (req == NULL) 3655 return NULL; 3656 3657 if (duration1 || interval1) { 3658 os_memset(&desc1, 0, sizeof(desc1)); 3659 desc1.count_type = 1; 3660 desc1.duration = duration1; 3661 desc1.interval = interval1; 3662 ptr1 = &desc1; 3663 3664 if (duration2 || interval2) { 3665 os_memset(&desc2, 0, sizeof(desc2)); 3666 desc2.count_type = 2; 3667 desc2.duration = duration2; 3668 desc2.interval = interval2; 3669 ptr2 = &desc2; 3670 } 3671 } 3672 3673 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1); 3674 len = p2p_buf_add_ie_hdr(req); 3675 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2); 3676 p2p_buf_update_ie_hdr(req, len); 3677 3678 return req; 3679} 3680 3681 3682int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr, 3683 const u8 *own_interface_addr, unsigned int freq, 3684 u32 duration1, u32 interval1, u32 duration2, 3685 u32 interval2) 3686{ 3687 struct wpabuf *req; 3688 3689 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR 3690 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u " 3691 "dur2=%u int2=%u", 3692 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr), 3693 freq, duration1, interval1, duration2, interval2); 3694 3695 req = p2p_build_presence_req(duration1, interval1, duration2, 3696 interval2); 3697 if (req == NULL) 3698 return -1; 3699 3700 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3701 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr, 3702 go_interface_addr, 3703 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 3704 p2p_dbg(p2p, "Failed to send Action frame"); 3705 } 3706 wpabuf_free(req); 3707 3708 return 0; 3709} 3710 3711 3712static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa, 3713 size_t noa_len, u8 dialog_token) 3714{ 3715 struct wpabuf *resp; 3716 u8 *len; 3717 3718 resp = wpabuf_alloc(100 + noa_len); 3719 if (resp == NULL) 3720 return NULL; 3721 3722 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token); 3723 len = p2p_buf_add_ie_hdr(resp); 3724 p2p_buf_add_status(resp, status); 3725 if (noa) { 3726 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE); 3727 wpabuf_put_le16(resp, noa_len); 3728 wpabuf_put_data(resp, noa, noa_len); 3729 } else 3730 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL); 3731 p2p_buf_update_ie_hdr(resp, len); 3732 3733 return resp; 3734} 3735 3736 3737static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 3738 const u8 *sa, const u8 *data, size_t len, 3739 int rx_freq) 3740{ 3741 struct p2p_message msg; 3742 u8 status; 3743 struct wpabuf *resp; 3744 size_t g; 3745 struct p2p_group *group = NULL; 3746 int parsed = 0; 3747 u8 noa[50]; 3748 int noa_len; 3749 3750 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request"); 3751 3752 for (g = 0; g < p2p->num_groups; g++) { 3753 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]), 3754 ETH_ALEN) == 0) { 3755 group = p2p->groups[g]; 3756 break; 3757 } 3758 } 3759 if (group == NULL) { 3760 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group " 3761 MACSTR, MAC2STR(da)); 3762 return; 3763 } 3764 3765 if (p2p_parse(data, len, &msg) < 0) { 3766 p2p_dbg(p2p, "Failed to parse P2P Presence Request"); 3767 status = P2P_SC_FAIL_INVALID_PARAMS; 3768 goto fail; 3769 } 3770 parsed = 1; 3771 3772 if (msg.noa == NULL) { 3773 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request"); 3774 status = P2P_SC_FAIL_INVALID_PARAMS; 3775 goto fail; 3776 } 3777 3778 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len); 3779 3780fail: 3781 if (p2p->cfg->get_noa) 3782 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa, 3783 sizeof(noa)); 3784 else 3785 noa_len = -1; 3786 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL, 3787 noa_len > 0 ? noa_len : 0, 3788 msg.dialog_token); 3789 if (parsed) 3790 p2p_parse_free(&msg); 3791 if (resp == NULL) 3792 return; 3793 3794 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3795 if (p2p_send_action(p2p, rx_freq, sa, da, da, 3796 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 3797 p2p_dbg(p2p, "Failed to send Action frame"); 3798 } 3799 wpabuf_free(resp); 3800} 3801 3802 3803static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 3804 const u8 *sa, const u8 *data, size_t len) 3805{ 3806 struct p2p_message msg; 3807 3808 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response"); 3809 3810 if (p2p_parse(data, len, &msg) < 0) { 3811 p2p_dbg(p2p, "Failed to parse P2P Presence Response"); 3812 return; 3813 } 3814 3815 if (msg.status == NULL || msg.noa == NULL) { 3816 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response"); 3817 p2p_parse_free(&msg); 3818 return; 3819 } 3820 3821 if (p2p->cfg->presence_resp) { 3822 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status, 3823 msg.noa, msg.noa_len); 3824 } 3825 3826 if (*msg.status) { 3827 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u", 3828 *msg.status); 3829 p2p_parse_free(&msg); 3830 return; 3831 } 3832 3833 p2p_dbg(p2p, "P2P Presence Request was accepted"); 3834 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA", 3835 msg.noa, msg.noa_len); 3836 /* TODO: process NoA */ 3837 p2p_parse_free(&msg); 3838} 3839 3840 3841static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx) 3842{ 3843 struct p2p_data *p2p = eloop_ctx; 3844 3845 if (p2p->ext_listen_interval) { 3846 /* Schedule next extended listen timeout */ 3847 eloop_register_timeout(p2p->ext_listen_interval_sec, 3848 p2p->ext_listen_interval_usec, 3849 p2p_ext_listen_timeout, p2p, NULL); 3850 } 3851 3852 if (p2p->cfg->is_p2p_in_progress && 3853 p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) { 3854 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)", 3855 p2p_state_txt(p2p->state)); 3856 return; 3857 } 3858 3859 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) { 3860 /* 3861 * This should not really happen, but it looks like the Listen 3862 * command may fail is something else (e.g., a scan) was 3863 * running at an inconvenient time. As a workaround, allow new 3864 * Extended Listen operation to be started. 3865 */ 3866 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again"); 3867 p2p->ext_listen_only = 0; 3868 p2p_set_state(p2p, P2P_IDLE); 3869 } 3870 3871 if (p2p->state != P2P_IDLE) { 3872 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state)); 3873 return; 3874 } 3875 3876 p2p_dbg(p2p, "Extended Listen timeout"); 3877 p2p->ext_listen_only = 1; 3878 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) { 3879 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing"); 3880 p2p->ext_listen_only = 0; 3881 } 3882} 3883 3884 3885int p2p_ext_listen(struct p2p_data *p2p, unsigned int period, 3886 unsigned int interval) 3887{ 3888 if (period > 65535 || interval > 65535 || period > interval || 3889 (period == 0 && interval > 0) || (period > 0 && interval == 0)) { 3890 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u", 3891 period, interval); 3892 return -1; 3893 } 3894 3895 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 3896 3897 if (interval == 0) { 3898 p2p_dbg(p2p, "Disabling Extended Listen Timing"); 3899 p2p->ext_listen_period = 0; 3900 p2p->ext_listen_interval = 0; 3901 return 0; 3902 } 3903 3904 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec", 3905 period, interval); 3906 p2p->ext_listen_period = period; 3907 p2p->ext_listen_interval = interval; 3908 p2p->ext_listen_interval_sec = interval / 1000; 3909 p2p->ext_listen_interval_usec = (interval % 1000) * 1000; 3910 3911 eloop_register_timeout(p2p->ext_listen_interval_sec, 3912 p2p->ext_listen_interval_usec, 3913 p2p_ext_listen_timeout, p2p, NULL); 3914 3915 return 0; 3916} 3917 3918 3919void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 3920 const u8 *ie, size_t ie_len) 3921{ 3922 struct p2p_message msg; 3923 3924 if (bssid == NULL || ie == NULL) 3925 return; 3926 3927 os_memset(&msg, 0, sizeof(msg)); 3928 if (p2p_parse_ies(ie, ie_len, &msg)) 3929 return; 3930 if (msg.minor_reason_code == NULL) { 3931 p2p_parse_free(&msg); 3932 return; 3933 } 3934 3935 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR 3936 " reason_code=%u minor_reason_code=%u", 3937 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 3938 3939 p2p_parse_free(&msg); 3940} 3941 3942 3943void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 3944 const u8 *ie, size_t ie_len) 3945{ 3946 struct p2p_message msg; 3947 3948 if (bssid == NULL || ie == NULL) 3949 return; 3950 3951 os_memset(&msg, 0, sizeof(msg)); 3952 if (p2p_parse_ies(ie, ie_len, &msg)) 3953 return; 3954 if (msg.minor_reason_code == NULL) { 3955 p2p_parse_free(&msg); 3956 return; 3957 } 3958 3959 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR 3960 " reason_code=%u minor_reason_code=%u", 3961 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 3962 3963 p2p_parse_free(&msg); 3964} 3965 3966 3967void p2p_set_managed_oper(struct p2p_data *p2p, int enabled) 3968{ 3969 if (enabled) { 3970 p2p_dbg(p2p, "Managed P2P Device operations enabled"); 3971 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED; 3972 } else { 3973 p2p_dbg(p2p, "Managed P2P Device operations disabled"); 3974 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED; 3975 } 3976} 3977 3978 3979int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel) 3980{ 3981 if (p2p_channel_to_freq(reg_class, channel) < 0) 3982 return -1; 3983 3984 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u", 3985 reg_class, channel); 3986 p2p->cfg->reg_class = reg_class; 3987 p2p->cfg->channel = channel; 3988 3989 return 0; 3990} 3991 3992 3993int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len) 3994{ 3995 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len)); 3996 if (postfix == NULL) { 3997 p2p->cfg->ssid_postfix_len = 0; 3998 return 0; 3999 } 4000 if (len > sizeof(p2p->cfg->ssid_postfix)) 4001 return -1; 4002 os_memcpy(p2p->cfg->ssid_postfix, postfix, len); 4003 p2p->cfg->ssid_postfix_len = len; 4004 return 0; 4005} 4006 4007 4008int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel, 4009 int cfg_op_channel) 4010{ 4011 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0) 4012 return -1; 4013 4014 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u", 4015 op_reg_class, op_channel); 4016 p2p->cfg->op_reg_class = op_reg_class; 4017 p2p->cfg->op_channel = op_channel; 4018 p2p->cfg->cfg_op_channel = cfg_op_channel; 4019 return 0; 4020} 4021 4022 4023int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan, 4024 const struct p2p_channel *pref_chan) 4025{ 4026 struct p2p_channel *n; 4027 4028 if (pref_chan) { 4029 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel)); 4030 if (n == NULL) 4031 return -1; 4032 os_memcpy(n, pref_chan, 4033 num_pref_chan * sizeof(struct p2p_channel)); 4034 } else 4035 n = NULL; 4036 4037 os_free(p2p->cfg->pref_chan); 4038 p2p->cfg->pref_chan = n; 4039 p2p->cfg->num_pref_chan = num_pref_chan; 4040 4041 return 0; 4042} 4043 4044 4045int p2p_set_no_go_freq(struct p2p_data *p2p, 4046 const struct wpa_freq_range_list *list) 4047{ 4048 struct wpa_freq_range *tmp; 4049 4050 if (list == NULL || list->num == 0) { 4051 os_free(p2p->no_go_freq.range); 4052 p2p->no_go_freq.range = NULL; 4053 p2p->no_go_freq.num = 0; 4054 return 0; 4055 } 4056 4057 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range)); 4058 if (tmp == NULL) 4059 return -1; 4060 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range)); 4061 os_free(p2p->no_go_freq.range); 4062 p2p->no_go_freq.range = tmp; 4063 p2p->no_go_freq.num = list->num; 4064 p2p_dbg(p2p, "Updated no GO chan list"); 4065 4066 return 0; 4067} 4068 4069 4070int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr, 4071 u8 *iface_addr) 4072{ 4073 struct p2p_device *dev = p2p_get_device(p2p, dev_addr); 4074 if (dev == NULL || is_zero_ether_addr(dev->interface_addr)) 4075 return -1; 4076 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN); 4077 return 0; 4078} 4079 4080 4081int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr, 4082 u8 *dev_addr) 4083{ 4084 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4085 if (dev == NULL) 4086 return -1; 4087 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN); 4088 return 0; 4089} 4090 4091 4092void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr) 4093{ 4094 os_memcpy(p2p->peer_filter, addr, ETH_ALEN); 4095 if (is_zero_ether_addr(p2p->peer_filter)) 4096 p2p_dbg(p2p, "Disable peer filter"); 4097 else 4098 p2p_dbg(p2p, "Enable peer filter for " MACSTR, 4099 MAC2STR(p2p->peer_filter)); 4100} 4101 4102 4103void p2p_set_cross_connect(struct p2p_data *p2p, int enabled) 4104{ 4105 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled"); 4106 if (p2p->cross_connect == enabled) 4107 return; 4108 p2p->cross_connect = enabled; 4109 /* TODO: may need to tear down any action group where we are GO(?) */ 4110} 4111 4112 4113int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr) 4114{ 4115 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4116 if (dev == NULL) 4117 return -1; 4118 if (dev->oper_freq <= 0) 4119 return -1; 4120 return dev->oper_freq; 4121} 4122 4123 4124void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled) 4125{ 4126 p2p_dbg(p2p, "Intra BSS distribution %s", 4127 enabled ? "enabled" : "disabled"); 4128 p2p->cfg->p2p_intra_bss = enabled; 4129} 4130 4131 4132void p2p_update_channel_list(struct p2p_data *p2p, 4133 const struct p2p_channels *chan, 4134 const struct p2p_channels *cli_chan) 4135{ 4136 p2p_dbg(p2p, "Update channel list"); 4137 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels)); 4138 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 4139 os_memcpy(&p2p->cfg->cli_channels, cli_chan, 4140 sizeof(struct p2p_channels)); 4141 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 4142} 4143 4144 4145int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 4146 const u8 *src, const u8 *bssid, const u8 *buf, 4147 size_t len, unsigned int wait_time) 4148{ 4149 if (p2p->p2p_scan_running) { 4150 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes"); 4151 if (p2p->after_scan_tx) { 4152 p2p_dbg(p2p, "Dropped previous pending Action frame TX"); 4153 os_free(p2p->after_scan_tx); 4154 } 4155 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) + 4156 len); 4157 if (p2p->after_scan_tx == NULL) 4158 return -1; 4159 p2p->after_scan_tx->freq = freq; 4160 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN); 4161 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN); 4162 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN); 4163 p2p->after_scan_tx->len = len; 4164 p2p->after_scan_tx->wait_time = wait_time; 4165 os_memcpy(p2p->after_scan_tx + 1, buf, len); 4166 return 0; 4167 } 4168 4169 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid, 4170 buf, len, wait_time); 4171} 4172 4173 4174void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5, 4175 int freq_overall) 4176{ 4177 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d", 4178 freq_24, freq_5, freq_overall); 4179 p2p->best_freq_24 = freq_24; 4180 p2p->best_freq_5 = freq_5; 4181 p2p->best_freq_overall = freq_overall; 4182} 4183 4184 4185void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq) 4186{ 4187 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq); 4188 p2p->own_freq_preference = freq; 4189} 4190 4191 4192const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p) 4193{ 4194 if (p2p == NULL || p2p->go_neg_peer == NULL) 4195 return NULL; 4196 return p2p->go_neg_peer->info.p2p_device_addr; 4197} 4198 4199 4200const struct p2p_peer_info * 4201p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next) 4202{ 4203 struct p2p_device *dev; 4204 4205 if (addr) { 4206 dev = p2p_get_device(p2p, addr); 4207 if (!dev) 4208 return NULL; 4209 4210 if (!next) { 4211 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 4212 return NULL; 4213 4214 return &dev->info; 4215 } else { 4216 do { 4217 dev = dl_list_first(&dev->list, 4218 struct p2p_device, 4219 list); 4220 if (!dev || &dev->list == &p2p->devices) 4221 return NULL; 4222 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY); 4223 } 4224 } else { 4225 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4226 if (!dev) 4227 return NULL; 4228 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 4229 dev = dl_list_first(&dev->list, 4230 struct p2p_device, 4231 list); 4232 if (!dev || &dev->list == &p2p->devices) 4233 return NULL; 4234 } 4235 } 4236 4237 return &dev->info; 4238} 4239 4240 4241int p2p_in_progress(struct p2p_data *p2p) 4242{ 4243 if (p2p == NULL) 4244 return 0; 4245 if (p2p->state == P2P_SEARCH) 4246 return 2; 4247 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING; 4248} 4249 4250 4251void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout, 4252 u8 client_timeout) 4253{ 4254 if (p2p) { 4255 p2p->go_timeout = go_timeout; 4256 p2p->client_timeout = client_timeout; 4257 } 4258} 4259 4260 4261#ifdef CONFIG_WIFI_DISPLAY 4262 4263static void p2p_update_wfd_ie_groups(struct p2p_data *p2p) 4264{ 4265 size_t g; 4266 struct p2p_group *group; 4267 4268 for (g = 0; g < p2p->num_groups; g++) { 4269 group = p2p->groups[g]; 4270 p2p_group_force_beacon_update_ies(group); 4271 } 4272} 4273 4274 4275int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie) 4276{ 4277 wpabuf_free(p2p->wfd_ie_beacon); 4278 p2p->wfd_ie_beacon = ie; 4279 p2p_update_wfd_ie_groups(p2p); 4280 return 0; 4281} 4282 4283 4284int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie) 4285{ 4286 wpabuf_free(p2p->wfd_ie_probe_req); 4287 p2p->wfd_ie_probe_req = ie; 4288 return 0; 4289} 4290 4291 4292int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie) 4293{ 4294 wpabuf_free(p2p->wfd_ie_probe_resp); 4295 p2p->wfd_ie_probe_resp = ie; 4296 p2p_update_wfd_ie_groups(p2p); 4297 return 0; 4298} 4299 4300 4301int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie) 4302{ 4303 wpabuf_free(p2p->wfd_ie_assoc_req); 4304 p2p->wfd_ie_assoc_req = ie; 4305 return 0; 4306} 4307 4308 4309int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie) 4310{ 4311 wpabuf_free(p2p->wfd_ie_invitation); 4312 p2p->wfd_ie_invitation = ie; 4313 return 0; 4314} 4315 4316 4317int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie) 4318{ 4319 wpabuf_free(p2p->wfd_ie_prov_disc_req); 4320 p2p->wfd_ie_prov_disc_req = ie; 4321 return 0; 4322} 4323 4324 4325int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie) 4326{ 4327 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 4328 p2p->wfd_ie_prov_disc_resp = ie; 4329 return 0; 4330} 4331 4332 4333int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie) 4334{ 4335 wpabuf_free(p2p->wfd_ie_go_neg); 4336 p2p->wfd_ie_go_neg = ie; 4337 return 0; 4338} 4339 4340 4341int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem) 4342{ 4343 wpabuf_free(p2p->wfd_dev_info); 4344 if (elem) { 4345 p2p->wfd_dev_info = wpabuf_dup(elem); 4346 if (p2p->wfd_dev_info == NULL) 4347 return -1; 4348 } else 4349 p2p->wfd_dev_info = NULL; 4350 4351 return 0; 4352} 4353 4354 4355int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem) 4356{ 4357 wpabuf_free(p2p->wfd_assoc_bssid); 4358 if (elem) { 4359 p2p->wfd_assoc_bssid = wpabuf_dup(elem); 4360 if (p2p->wfd_assoc_bssid == NULL) 4361 return -1; 4362 } else 4363 p2p->wfd_assoc_bssid = NULL; 4364 4365 return 0; 4366} 4367 4368 4369int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p, 4370 const struct wpabuf *elem) 4371{ 4372 wpabuf_free(p2p->wfd_coupled_sink_info); 4373 if (elem) { 4374 p2p->wfd_coupled_sink_info = wpabuf_dup(elem); 4375 if (p2p->wfd_coupled_sink_info == NULL) 4376 return -1; 4377 } else 4378 p2p->wfd_coupled_sink_info = NULL; 4379 4380 return 0; 4381} 4382 4383#endif /* CONFIG_WIFI_DISPLAY */ 4384 4385 4386int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int, 4387 int max_disc_tu) 4388{ 4389 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0) 4390 return -1; 4391 4392 p2p->min_disc_int = min_disc_int; 4393 p2p->max_disc_int = max_disc_int; 4394 p2p->max_disc_tu = max_disc_tu; 4395 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d", 4396 min_disc_int, max_disc_int, max_disc_tu); 4397 4398 return 0; 4399} 4400 4401 4402void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...) 4403{ 4404 va_list ap; 4405 char buf[500]; 4406 4407 if (!p2p->cfg->debug_print) 4408 return; 4409 4410 va_start(ap, fmt); 4411 vsnprintf(buf, sizeof(buf), fmt, ap); 4412 buf[sizeof(buf) - 1] = '\0'; 4413 va_end(ap); 4414 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf); 4415} 4416 4417 4418void p2p_info(struct p2p_data *p2p, const char *fmt, ...) 4419{ 4420 va_list ap; 4421 char buf[500]; 4422 4423 if (!p2p->cfg->debug_print) 4424 return; 4425 4426 va_start(ap, fmt); 4427 vsnprintf(buf, sizeof(buf), fmt, ap); 4428 buf[sizeof(buf) - 1] = '\0'; 4429 va_end(ap); 4430 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf); 4431} 4432 4433 4434void p2p_err(struct p2p_data *p2p, const char *fmt, ...) 4435{ 4436 va_list ap; 4437 char buf[500]; 4438 4439 if (!p2p->cfg->debug_print) 4440 return; 4441 4442 va_start(ap, fmt); 4443 vsnprintf(buf, sizeof(buf), fmt, ap); 4444 buf[sizeof(buf) - 1] = '\0'; 4445 va_end(ap); 4446 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf); 4447} 4448 4449 4450#ifdef CONFIG_WPS_NFC 4451 4452static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p, 4453 int client_freq, 4454 const u8 *go_dev_addr, 4455 const u8 *ssid, size_t ssid_len) 4456{ 4457 struct wpabuf *buf; 4458 u8 op_class, channel; 4459 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP; 4460 4461 buf = wpabuf_alloc(1000); 4462 if (buf == NULL) 4463 return NULL; 4464 4465 op_class = p2p->cfg->reg_class; 4466 channel = p2p->cfg->channel; 4467 4468 p2p_buf_add_capability(buf, p2p->dev_capab & 4469 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 4470 p2p_buf_add_device_info(buf, p2p, NULL); 4471 4472 if (p2p->num_groups > 0) { 4473 int freq = p2p_group_get_freq(p2p->groups[0]); 4474 role = P2P_GO_IN_A_GROUP; 4475 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) { 4476 p2p_dbg(p2p, 4477 "Unknown GO operating frequency %d MHz for NFC handover", 4478 freq); 4479 wpabuf_free(buf); 4480 return NULL; 4481 } 4482 } else if (client_freq > 0) { 4483 role = P2P_CLIENT_IN_A_GROUP; 4484 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) { 4485 p2p_dbg(p2p, 4486 "Unknown client operating frequency %d MHz for NFC handover", 4487 client_freq); 4488 wpabuf_free(buf); 4489 return NULL; 4490 } 4491 } 4492 4493 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class, 4494 channel, role); 4495 4496 if (p2p->num_groups > 0) { 4497 /* Limit number of clients to avoid very long message */ 4498 p2p_buf_add_group_info(p2p->groups[0], buf, 5); 4499 p2p_group_buf_add_id(p2p->groups[0], buf); 4500 } else if (client_freq > 0 && 4501 go_dev_addr && !is_zero_ether_addr(go_dev_addr) && 4502 ssid && ssid_len > 0) { 4503 /* 4504 * Add the optional P2P Group ID to indicate in which group this 4505 * device is a P2P Client. 4506 */ 4507 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len); 4508 } 4509 4510 return buf; 4511} 4512 4513 4514struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p, 4515 int client_freq, 4516 const u8 *go_dev_addr, 4517 const u8 *ssid, size_t ssid_len) 4518{ 4519 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 4520 ssid_len); 4521} 4522 4523 4524struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p, 4525 int client_freq, 4526 const u8 *go_dev_addr, 4527 const u8 *ssid, size_t ssid_len) 4528{ 4529 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 4530 ssid_len); 4531} 4532 4533 4534int p2p_process_nfc_connection_handover(struct p2p_data *p2p, 4535 struct p2p_nfc_params *params) 4536{ 4537 struct p2p_message msg; 4538 struct p2p_device *dev; 4539 const u8 *p2p_dev_addr; 4540 int freq; 4541 enum p2p_role_indication role; 4542 4543 params->next_step = NO_ACTION; 4544 4545 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len, 4546 params->p2p_attr, params->p2p_len, &msg)) { 4547 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC"); 4548 p2p_parse_free(&msg); 4549 return -1; 4550 } 4551 4552 if (msg.p2p_device_addr) 4553 p2p_dev_addr = msg.p2p_device_addr; 4554 else if (msg.device_id) 4555 p2p_dev_addr = msg.device_id; 4556 else { 4557 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 4558 p2p_parse_free(&msg); 4559 return -1; 4560 } 4561 4562 if (msg.oob_dev_password) { 4563 os_memcpy(params->oob_dev_pw, msg.oob_dev_password, 4564 msg.oob_dev_password_len); 4565 params->oob_dev_pw_len = msg.oob_dev_password_len; 4566 } 4567 4568 dev = p2p_create_device(p2p, p2p_dev_addr); 4569 if (dev == NULL) { 4570 p2p_parse_free(&msg); 4571 return -1; 4572 } 4573 4574 params->peer = &dev->info; 4575 4576 os_get_reltime(&dev->last_seen); 4577 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 4578 p2p_copy_wps_info(p2p, dev, 0, &msg); 4579 4580 if (!msg.oob_go_neg_channel) { 4581 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included"); 4582 return -1; 4583 } 4584 4585 if (msg.oob_go_neg_channel[3] == 0 && 4586 msg.oob_go_neg_channel[4] == 0) 4587 freq = 0; 4588 else 4589 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3], 4590 msg.oob_go_neg_channel[4]); 4591 if (freq < 0) { 4592 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel"); 4593 return -1; 4594 } 4595 role = msg.oob_go_neg_channel[5]; 4596 4597 if (role == P2P_GO_IN_A_GROUP) { 4598 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq); 4599 params->go_freq = freq; 4600 } else if (role == P2P_CLIENT_IN_A_GROUP) { 4601 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz", 4602 freq); 4603 params->go_freq = freq; 4604 } else 4605 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq); 4606 dev->oob_go_neg_freq = freq; 4607 4608 if (!params->sel && role != P2P_GO_IN_A_GROUP) { 4609 freq = p2p_channel_to_freq(p2p->cfg->reg_class, 4610 p2p->cfg->channel); 4611 if (freq < 0) { 4612 p2p_dbg(p2p, "Own listen channel not known"); 4613 return -1; 4614 } 4615 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq); 4616 dev->oob_go_neg_freq = freq; 4617 } 4618 4619 if (msg.group_id) { 4620 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN); 4621 params->go_ssid_len = msg.group_id_len - ETH_ALEN; 4622 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN, 4623 params->go_ssid_len); 4624 } 4625 4626 p2p_parse_free(&msg); 4627 4628 if (dev->flags & P2P_DEV_USER_REJECTED) { 4629 p2p_dbg(p2p, "Do not report rejected device"); 4630 return 0; 4631 } 4632 4633 if (!(dev->flags & P2P_DEV_REPORTED)) { 4634 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info, 4635 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 4636 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 4637 } 4638 4639 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0) 4640 params->next_step = BOTH_GO; 4641 else if (role == P2P_GO_IN_A_GROUP) 4642 params->next_step = JOIN_GROUP; 4643 else if (role == P2P_CLIENT_IN_A_GROUP) { 4644 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 4645 params->next_step = PEER_CLIENT; 4646 } else if (p2p->num_groups > 0) 4647 params->next_step = AUTH_JOIN; 4648 else if (params->sel) 4649 params->next_step = INIT_GO_NEG; 4650 else 4651 params->next_step = RESP_GO_NEG; 4652 4653 return 0; 4654} 4655 4656 4657void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id, 4658 int go_intent, 4659 const u8 *own_interface_addr) 4660{ 4661 4662 p2p->authorized_oob_dev_pw_id = dev_pw_id; 4663 if (dev_pw_id == 0) { 4664 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover"); 4665 return; 4666 } 4667 4668 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover", 4669 dev_pw_id); 4670 4671 p2p->go_intent = go_intent; 4672 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 4673} 4674 4675#endif /* CONFIG_WPS_NFC */ 4676