p2p.c revision 7f93d6fa14a343127754c33a03cf2f641b6ff6e4
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 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, 222 ETH_ALEN); 223 os_memcpy(res.peer_interface_addr, peer->intended_addr, 224 ETH_ALEN); 225 } 226 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 227} 228 229 230static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc) 231{ 232 unsigned int r, tu; 233 int freq; 234 struct wpabuf *ies; 235 236 p2p_dbg(p2p, "Starting short listen state (state=%s)", 237 p2p_state_txt(p2p->state)); 238 239 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 240 if (freq < 0) { 241 p2p_dbg(p2p, "Unknown regulatory class/channel"); 242 return; 243 } 244 245 os_get_random((u8 *) &r, sizeof(r)); 246 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) + 247 p2p->min_disc_int) * 100; 248 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu) 249 tu = p2p->max_disc_tu; 250 if (!dev_disc && tu < 100) 251 tu = 100; /* Need to wait in non-device discovery use cases */ 252 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen) 253 tu = p2p->cfg->max_listen * 1000 / 1024; 254 255 if (tu == 0) { 256 p2p_dbg(p2p, "Skip listen state since duration was 0 TU"); 257 p2p_set_timeout(p2p, 0, 0); 258 return; 259 } 260 261 p2p->pending_listen_freq = freq; 262 p2p->pending_listen_sec = 0; 263 p2p->pending_listen_usec = 1024 * tu; 264 265 ies = p2p_build_probe_resp_ies(p2p); 266 if (ies == NULL) 267 return; 268 269 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000, 270 ies) < 0) { 271 p2p_dbg(p2p, "Failed to start listen mode"); 272 p2p->pending_listen_freq = 0; 273 } 274 wpabuf_free(ies); 275} 276 277 278int p2p_listen(struct p2p_data *p2p, unsigned int timeout) 279{ 280 int freq; 281 struct wpabuf *ies; 282 283 p2p_dbg(p2p, "Going to listen(only) state"); 284 285 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 286 if (freq < 0) { 287 p2p_dbg(p2p, "Unknown regulatory class/channel"); 288 return -1; 289 } 290 291 p2p->pending_listen_freq = freq; 292 p2p->pending_listen_sec = timeout / 1000; 293 p2p->pending_listen_usec = (timeout % 1000) * 1000; 294 295 if (p2p->p2p_scan_running) { 296 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) { 297 p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen"); 298 return 0; 299 } 300 p2p_dbg(p2p, "p2p_scan running - delay start of listen state"); 301 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN; 302 return 0; 303 } 304 305 ies = p2p_build_probe_resp_ies(p2p); 306 if (ies == NULL) 307 return -1; 308 309 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) { 310 p2p_dbg(p2p, "Failed to start listen mode"); 311 p2p->pending_listen_freq = 0; 312 wpabuf_free(ies); 313 return -1; 314 } 315 wpabuf_free(ies); 316 317 p2p_set_state(p2p, P2P_LISTEN_ONLY); 318 319 return 0; 320} 321 322 323static void p2p_device_clear_reported(struct p2p_data *p2p) 324{ 325 struct p2p_device *dev; 326 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) 327 dev->flags &= ~P2P_DEV_REPORTED; 328} 329 330 331/** 332 * p2p_get_device - Fetch a peer entry 333 * @p2p: P2P module context from p2p_init() 334 * @addr: P2P Device Address of the peer 335 * Returns: Pointer to the device entry or %NULL if not found 336 */ 337struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr) 338{ 339 struct p2p_device *dev; 340 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 341 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0) 342 return dev; 343 } 344 return NULL; 345} 346 347 348/** 349 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address 350 * @p2p: P2P module context from p2p_init() 351 * @addr: P2P Interface Address of the peer 352 * Returns: Pointer to the device entry or %NULL if not found 353 */ 354struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p, 355 const u8 *addr) 356{ 357 struct p2p_device *dev; 358 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 359 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0) 360 return dev; 361 } 362 return NULL; 363} 364 365 366/** 367 * p2p_create_device - Create a peer entry 368 * @p2p: P2P module context from p2p_init() 369 * @addr: P2P Device Address of the peer 370 * Returns: Pointer to the device entry or %NULL on failure 371 * 372 * If there is already an entry for the peer, it will be returned instead of 373 * creating a new one. 374 */ 375static struct p2p_device * p2p_create_device(struct p2p_data *p2p, 376 const u8 *addr) 377{ 378 struct p2p_device *dev, *oldest = NULL; 379 size_t count = 0; 380 381 dev = p2p_get_device(p2p, addr); 382 if (dev) 383 return dev; 384 385 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 386 count++; 387 if (oldest == NULL || 388 os_reltime_before(&dev->last_seen, &oldest->last_seen)) 389 oldest = dev; 390 } 391 if (count + 1 > p2p->cfg->max_peers && oldest) { 392 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer"); 393 dl_list_del(&oldest->list); 394 p2p_device_free(p2p, oldest); 395 } 396 397 dev = os_zalloc(sizeof(*dev)); 398 if (dev == NULL) 399 return NULL; 400 dl_list_add(&p2p->devices, &dev->list); 401 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN); 402 403 return dev; 404} 405 406 407static void p2p_copy_client_info(struct p2p_device *dev, 408 struct p2p_client_info *cli) 409{ 410 os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len); 411 dev->info.device_name[cli->dev_name_len] = '\0'; 412 dev->info.dev_capab = cli->dev_capab; 413 dev->info.config_methods = cli->config_methods; 414 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8); 415 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types; 416 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types, 417 dev->info.wps_sec_dev_type_list_len); 418} 419 420 421static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr, 422 const u8 *go_interface_addr, int freq, 423 const u8 *gi, size_t gi_len) 424{ 425 struct p2p_group_info info; 426 size_t c; 427 struct p2p_device *dev; 428 429 if (gi == NULL) 430 return 0; 431 432 if (p2p_group_info_parse(gi, gi_len, &info) < 0) 433 return -1; 434 435 /* 436 * Clear old data for this group; if the devices are still in the 437 * group, the information will be restored in the loop following this. 438 */ 439 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 440 if (os_memcmp(dev->member_in_go_iface, go_interface_addr, 441 ETH_ALEN) == 0) { 442 os_memset(dev->member_in_go_iface, 0, ETH_ALEN); 443 os_memset(dev->member_in_go_dev, 0, ETH_ALEN); 444 } 445 } 446 447 for (c = 0; c < info.num_clients; c++) { 448 struct p2p_client_info *cli = &info.client[c]; 449 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr, 450 ETH_ALEN) == 0) 451 continue; /* ignore our own entry */ 452 dev = p2p_get_device(p2p, cli->p2p_device_addr); 453 if (dev) { 454 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY | 455 P2P_DEV_PROBE_REQ_ONLY)) { 456 /* 457 * Update information since we have not 458 * received this directly from the client. 459 */ 460 p2p_copy_client_info(dev, cli); 461 } else { 462 /* 463 * Need to update P2P Client Discoverability 464 * flag since it is valid only in P2P Group 465 * Info attribute. 466 */ 467 dev->info.dev_capab &= 468 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 469 dev->info.dev_capab |= 470 cli->dev_capab & 471 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 472 } 473 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 474 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 475 } 476 } else { 477 dev = p2p_create_device(p2p, cli->p2p_device_addr); 478 if (dev == NULL) 479 continue; 480 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 481 p2p_copy_client_info(dev, cli); 482 dev->oper_freq = freq; 483 p2p->cfg->dev_found(p2p->cfg->cb_ctx, 484 dev->info.p2p_device_addr, 485 &dev->info, 1); 486 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 487 } 488 489 os_memcpy(dev->interface_addr, cli->p2p_interface_addr, 490 ETH_ALEN); 491 os_get_reltime(&dev->last_seen); 492 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN); 493 os_memcpy(dev->member_in_go_iface, go_interface_addr, 494 ETH_ALEN); 495 } 496 497 return 0; 498} 499 500 501static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev, 502 int probe_req, const struct p2p_message *msg) 503{ 504 os_memcpy(dev->info.device_name, msg->device_name, 505 sizeof(dev->info.device_name)); 506 507 if (msg->manufacturer && 508 msg->manufacturer_len < sizeof(dev->info.manufacturer)) { 509 os_memset(dev->info.manufacturer, 0, 510 sizeof(dev->info.manufacturer)); 511 os_memcpy(dev->info.manufacturer, msg->manufacturer, 512 msg->manufacturer_len); 513 } 514 515 if (msg->model_name && 516 msg->model_name_len < sizeof(dev->info.model_name)) { 517 os_memset(dev->info.model_name, 0, 518 sizeof(dev->info.model_name)); 519 os_memcpy(dev->info.model_name, msg->model_name, 520 msg->model_name_len); 521 } 522 523 if (msg->model_number && 524 msg->model_number_len < sizeof(dev->info.model_number)) { 525 os_memset(dev->info.model_number, 0, 526 sizeof(dev->info.model_number)); 527 os_memcpy(dev->info.model_number, msg->model_number, 528 msg->model_number_len); 529 } 530 531 if (msg->serial_number && 532 msg->serial_number_len < sizeof(dev->info.serial_number)) { 533 os_memset(dev->info.serial_number, 0, 534 sizeof(dev->info.serial_number)); 535 os_memcpy(dev->info.serial_number, msg->serial_number, 536 msg->serial_number_len); 537 } 538 539 if (msg->pri_dev_type) 540 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type, 541 sizeof(dev->info.pri_dev_type)); 542 else if (msg->wps_pri_dev_type) 543 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type, 544 sizeof(dev->info.pri_dev_type)); 545 546 if (msg->wps_sec_dev_type_list) { 547 os_memcpy(dev->info.wps_sec_dev_type_list, 548 msg->wps_sec_dev_type_list, 549 msg->wps_sec_dev_type_list_len); 550 dev->info.wps_sec_dev_type_list_len = 551 msg->wps_sec_dev_type_list_len; 552 } 553 554 if (msg->capability) { 555 /* 556 * P2P Client Discoverability bit is reserved in all frames 557 * that use this function, so do not change its value here. 558 */ 559 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 560 dev->info.dev_capab |= msg->capability[0] & 561 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 562 dev->info.group_capab = msg->capability[1]; 563 } 564 565 if (msg->ext_listen_timing) { 566 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing); 567 dev->ext_listen_interval = 568 WPA_GET_LE16(msg->ext_listen_timing + 2); 569 } 570 571 if (!probe_req) { 572 u16 new_config_methods; 573 new_config_methods = msg->config_methods ? 574 msg->config_methods : msg->wps_config_methods; 575 if (new_config_methods && 576 dev->info.config_methods != new_config_methods) { 577 p2p_dbg(p2p, "Update peer " MACSTR 578 " config_methods 0x%x -> 0x%x", 579 MAC2STR(dev->info.p2p_device_addr), 580 dev->info.config_methods, 581 new_config_methods); 582 dev->info.config_methods = new_config_methods; 583 } 584 } 585} 586 587 588/** 589 * p2p_add_device - Add peer entries based on scan results or P2P frames 590 * @p2p: P2P module context from p2p_init() 591 * @addr: Source address of Beacon or Probe Response frame (may be either 592 * P2P Device Address or P2P Interface Address) 593 * @level: Signal level (signal strength of the received frame from the peer) 594 * @freq: Frequency on which the Beacon or Probe Response frame was received 595 * @rx_time: Time when the result was received 596 * @ies: IEs from the Beacon or Probe Response frame 597 * @ies_len: Length of ies buffer in octets 598 * @scan_res: Whether this was based on scan results 599 * Returns: 0 on success, -1 on failure 600 * 601 * If the scan result is for a GO, the clients in the group will also be added 602 * to the peer table. This function can also be used with some other frames 603 * like Provision Discovery Request that contains P2P Capability and P2P Device 604 * Info attributes. 605 */ 606int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq, 607 struct os_reltime *rx_time, int level, const u8 *ies, 608 size_t ies_len, int scan_res) 609{ 610 struct p2p_device *dev; 611 struct p2p_message msg; 612 const u8 *p2p_dev_addr; 613 int i; 614 struct os_reltime time_now; 615 616 os_memset(&msg, 0, sizeof(msg)); 617 if (p2p_parse_ies(ies, ies_len, &msg)) { 618 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry"); 619 p2p_parse_free(&msg); 620 return -1; 621 } 622 623 if (msg.p2p_device_addr) 624 p2p_dev_addr = msg.p2p_device_addr; 625 else if (msg.device_id) 626 p2p_dev_addr = msg.device_id; 627 else { 628 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 629 p2p_parse_free(&msg); 630 return -1; 631 } 632 633 if (!is_zero_ether_addr(p2p->peer_filter) && 634 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) { 635 p2p_dbg(p2p, "Do not add peer filter for " MACSTR 636 " due to peer filter", MAC2STR(p2p_dev_addr)); 637 p2p_parse_free(&msg); 638 return 0; 639 } 640 641 dev = p2p_create_device(p2p, p2p_dev_addr); 642 if (dev == NULL) { 643 p2p_parse_free(&msg); 644 return -1; 645 } 646 647 if (rx_time == NULL) { 648 os_get_reltime(&time_now); 649 rx_time = &time_now; 650 } 651 652 /* 653 * Update the device entry only if the new peer 654 * entry is newer than the one previously stored. 655 */ 656 if (dev->last_seen.sec > 0 && 657 os_reltime_before(rx_time, &dev->last_seen)) { 658 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)", 659 (unsigned int) rx_time->sec, 660 (unsigned int) rx_time->usec, 661 (unsigned int) dev->last_seen.sec, 662 (unsigned int) dev->last_seen.usec); 663 p2p_parse_free(&msg); 664 return -1; 665 } 666 667 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime)); 668 669 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 670 671 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0) 672 os_memcpy(dev->interface_addr, addr, ETH_ALEN); 673 if (msg.ssid && 674 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 675 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 676 != 0)) { 677 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]); 678 dev->oper_ssid_len = msg.ssid[1]; 679 } 680 681 if (freq >= 2412 && freq <= 2484 && msg.ds_params && 682 *msg.ds_params >= 1 && *msg.ds_params <= 14) { 683 int ds_freq; 684 if (*msg.ds_params == 14) 685 ds_freq = 2484; 686 else 687 ds_freq = 2407 + *msg.ds_params * 5; 688 if (freq != ds_freq) { 689 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz", 690 freq, ds_freq); 691 freq = ds_freq; 692 } 693 } 694 695 if (dev->listen_freq && dev->listen_freq != freq && scan_res) { 696 p2p_dbg(p2p, "Update Listen frequency based on scan results (" 697 MACSTR " %d -> %d MHz (DS param %d)", 698 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq, 699 freq, msg.ds_params ? *msg.ds_params : -1); 700 } 701 if (scan_res) { 702 dev->listen_freq = freq; 703 if (msg.group_info) 704 dev->oper_freq = freq; 705 } 706 dev->info.level = level; 707 708 p2p_copy_wps_info(p2p, dev, 0, &msg); 709 710 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 711 wpabuf_free(dev->info.wps_vendor_ext[i]); 712 dev->info.wps_vendor_ext[i] = NULL; 713 } 714 715 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 716 if (msg.wps_vendor_ext[i] == NULL) 717 break; 718 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy( 719 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]); 720 if (dev->info.wps_vendor_ext[i] == NULL) 721 break; 722 } 723 724 if (msg.wfd_subelems) { 725 wpabuf_free(dev->info.wfd_subelems); 726 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 727 } 728 729 if (scan_res) { 730 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq, 731 msg.group_info, msg.group_info_len); 732 } 733 734 p2p_parse_free(&msg); 735 736 if (dev->flags & P2P_DEV_REPORTED) 737 return 0; 738 739 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)", 740 freq, (unsigned int) rx_time->sec, 741 (unsigned int) rx_time->usec); 742 if (dev->flags & P2P_DEV_USER_REJECTED) { 743 p2p_dbg(p2p, "Do not report rejected device"); 744 return 0; 745 } 746 747 if (dev->info.config_methods == 0 && 748 (freq == 2412 || freq == 2437 || freq == 2462)) { 749 /* 750 * If we have only seen a Beacon frame from a GO, we do not yet 751 * know what WPS config methods it supports. Since some 752 * applications use config_methods value from P2P-DEVICE-FOUND 753 * events, postpone reporting this peer until we've fully 754 * discovered its capabilities. 755 * 756 * At least for now, do this only if the peer was detected on 757 * one of the social channels since that peer can be easily be 758 * found again and there are no limitations of having to use 759 * passive scan on this channels, so this can be done through 760 * Probe Response frame that includes the config_methods 761 * information. 762 */ 763 p2p_dbg(p2p, "Do not report peer " MACSTR 764 " with unknown config methods", MAC2STR(addr)); 765 return 0; 766 } 767 768 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 769 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 770 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 771 772 return 0; 773} 774 775 776static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev) 777{ 778 int i; 779 780 if (p2p->go_neg_peer == dev) { 781 /* 782 * If GO Negotiation is in progress, report that it has failed. 783 */ 784 p2p_go_neg_failed(p2p, dev, -1); 785 p2p->go_neg_peer = NULL; 786 } 787 if (p2p->invite_peer == dev) 788 p2p->invite_peer = NULL; 789 if (p2p->sd_peer == dev) 790 p2p->sd_peer = NULL; 791 if (p2p->pending_client_disc_go == dev) 792 p2p->pending_client_disc_go = NULL; 793 794 /* dev_lost() device, but only if it was previously dev_found() */ 795 if (dev->flags & P2P_DEV_REPORTED_ONCE) 796 p2p->cfg->dev_lost(p2p->cfg->cb_ctx, 797 dev->info.p2p_device_addr); 798 799 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 800 wpabuf_free(dev->info.wps_vendor_ext[i]); 801 dev->info.wps_vendor_ext[i] = NULL; 802 } 803 804 wpabuf_free(dev->info.wfd_subelems); 805 806 os_free(dev); 807} 808 809 810static int p2p_get_next_prog_freq(struct p2p_data *p2p) 811{ 812 struct p2p_channels *c; 813 struct p2p_reg_class *cla; 814 size_t cl, ch; 815 int found = 0; 816 u8 reg_class; 817 u8 channel; 818 int freq; 819 820 c = &p2p->cfg->channels; 821 for (cl = 0; cl < c->reg_classes; cl++) { 822 cla = &c->reg_class[cl]; 823 if (cla->reg_class != p2p->last_prog_scan_class) 824 continue; 825 for (ch = 0; ch < cla->channels; ch++) { 826 if (cla->channel[ch] == p2p->last_prog_scan_chan) { 827 found = 1; 828 break; 829 } 830 } 831 if (found) 832 break; 833 } 834 835 if (!found) { 836 /* Start from beginning */ 837 reg_class = c->reg_class[0].reg_class; 838 channel = c->reg_class[0].channel[0]; 839 } else { 840 /* Pick the next channel */ 841 ch++; 842 if (ch == cla->channels) { 843 cl++; 844 if (cl == c->reg_classes) 845 cl = 0; 846 ch = 0; 847 } 848 reg_class = c->reg_class[cl].reg_class; 849 channel = c->reg_class[cl].channel[ch]; 850 } 851 852 freq = p2p_channel_to_freq(reg_class, channel); 853 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz", 854 reg_class, channel, freq); 855 p2p->last_prog_scan_class = reg_class; 856 p2p->last_prog_scan_chan = channel; 857 858 if (freq == 2412 || freq == 2437 || freq == 2462) 859 return 0; /* No need to add social channels */ 860 return freq; 861} 862 863 864static void p2p_search(struct p2p_data *p2p) 865{ 866 int freq = 0; 867 enum p2p_scan_type type; 868 u16 pw_id = DEV_PW_DEFAULT; 869 int res; 870 871 if (p2p->drv_in_listen) { 872 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing"); 873 return; 874 } 875 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 876 877 if (p2p->find_type == P2P_FIND_PROGRESSIVE && 878 (freq = p2p_get_next_prog_freq(p2p)) > 0) { 879 type = P2P_SCAN_SOCIAL_PLUS_ONE; 880 p2p_dbg(p2p, "Starting search (+ freq %u)", freq); 881 } else { 882 type = P2P_SCAN_SOCIAL; 883 p2p_dbg(p2p, "Starting search"); 884 } 885 886 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq, 887 p2p->num_req_dev_types, p2p->req_dev_types, 888 p2p->find_dev_id, pw_id); 889 if (res < 0) { 890 p2p_dbg(p2p, "Scan request failed"); 891 p2p_continue_find(p2p); 892 } else { 893 p2p_dbg(p2p, "Running p2p_scan"); 894 p2p->p2p_scan_running = 1; 895 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 896 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 897 p2p, NULL); 898 } 899} 900 901 902static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx) 903{ 904 struct p2p_data *p2p = eloop_ctx; 905 p2p_dbg(p2p, "Find timeout -> stop"); 906 p2p_stop_find(p2p); 907} 908 909 910static int p2p_run_after_scan(struct p2p_data *p2p) 911{ 912 struct p2p_device *dev; 913 enum p2p_after_scan op; 914 915 if (p2p->after_scan_tx) { 916 p2p->after_scan_tx_in_progress = 1; 917 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion"); 918 p2p->cfg->send_action(p2p->cfg->cb_ctx, 919 p2p->after_scan_tx->freq, 920 p2p->after_scan_tx->dst, 921 p2p->after_scan_tx->src, 922 p2p->after_scan_tx->bssid, 923 (u8 *) (p2p->after_scan_tx + 1), 924 p2p->after_scan_tx->len, 925 p2p->after_scan_tx->wait_time); 926 os_free(p2p->after_scan_tx); 927 p2p->after_scan_tx = NULL; 928 return 1; 929 } 930 931 op = p2p->start_after_scan; 932 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 933 switch (op) { 934 case P2P_AFTER_SCAN_NOTHING: 935 break; 936 case P2P_AFTER_SCAN_LISTEN: 937 p2p_dbg(p2p, "Start previously requested Listen state"); 938 p2p_listen(p2p, p2p->pending_listen_sec * 1000 + 939 p2p->pending_listen_usec / 1000); 940 return 1; 941 case P2P_AFTER_SCAN_CONNECT: 942 p2p_dbg(p2p, "Start previously requested connect with " MACSTR, 943 MAC2STR(p2p->after_scan_peer)); 944 dev = p2p_get_device(p2p, p2p->after_scan_peer); 945 if (dev == NULL) { 946 p2p_dbg(p2p, "Peer not known anymore"); 947 break; 948 } 949 p2p_connect_send(p2p, dev); 950 return 1; 951 } 952 953 return 0; 954} 955 956 957static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx) 958{ 959 struct p2p_data *p2p = eloop_ctx; 960 int running; 961 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running); 962 running = p2p->p2p_scan_running; 963 /* Make sure we recover from missed scan results callback */ 964 p2p->p2p_scan_running = 0; 965 966 if (running) 967 p2p_run_after_scan(p2p); 968} 969 970 971static void p2p_free_req_dev_types(struct p2p_data *p2p) 972{ 973 p2p->num_req_dev_types = 0; 974 os_free(p2p->req_dev_types); 975 p2p->req_dev_types = NULL; 976} 977 978 979int p2p_find(struct p2p_data *p2p, unsigned int timeout, 980 enum p2p_discovery_type type, 981 unsigned int num_req_dev_types, const u8 *req_dev_types, 982 const u8 *dev_id, unsigned int search_delay) 983{ 984 int res; 985 986 p2p_dbg(p2p, "Starting find (type=%d)", type); 987 os_get_reltime(&p2p->find_start); 988 if (p2p->p2p_scan_running) { 989 p2p_dbg(p2p, "p2p_scan is already running"); 990 } 991 992 p2p_free_req_dev_types(p2p); 993 if (req_dev_types && num_req_dev_types) { 994 p2p->req_dev_types = os_malloc(num_req_dev_types * 995 WPS_DEV_TYPE_LEN); 996 if (p2p->req_dev_types == NULL) 997 return -1; 998 os_memcpy(p2p->req_dev_types, req_dev_types, 999 num_req_dev_types * WPS_DEV_TYPE_LEN); 1000 p2p->num_req_dev_types = num_req_dev_types; 1001 } 1002 1003 if (dev_id) { 1004 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN); 1005 p2p->find_dev_id = p2p->find_dev_id_buf; 1006 } else 1007 p2p->find_dev_id = NULL; 1008 1009 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1010 p2p_clear_timeout(p2p); 1011 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1012 p2p->find_type = type; 1013 p2p_device_clear_reported(p2p); 1014 p2p_set_state(p2p, P2P_SEARCH); 1015 p2p->search_delay = search_delay; 1016 p2p->in_search_delay = 0; 1017 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1018 p2p->last_p2p_find_timeout = timeout; 1019 if (timeout) 1020 eloop_register_timeout(timeout, 0, p2p_find_timeout, 1021 p2p, NULL); 1022 switch (type) { 1023 case P2P_FIND_START_WITH_FULL: 1024 case P2P_FIND_PROGRESSIVE: 1025 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0, 1026 p2p->num_req_dev_types, 1027 p2p->req_dev_types, dev_id, 1028 DEV_PW_DEFAULT); 1029 break; 1030 case P2P_FIND_ONLY_SOCIAL: 1031 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0, 1032 p2p->num_req_dev_types, 1033 p2p->req_dev_types, dev_id, 1034 DEV_PW_DEFAULT); 1035 break; 1036 default: 1037 return -1; 1038 } 1039 1040 if (res == 0) { 1041 p2p_dbg(p2p, "Running p2p_scan"); 1042 p2p->p2p_scan_running = 1; 1043 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 1044 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 1045 p2p, NULL); 1046 } else if (p2p->p2p_scan_running) { 1047 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running"); 1048 /* wait for the previous p2p_scan to complete */ 1049 res = 0; /* do not report failure */ 1050 } else { 1051 p2p_dbg(p2p, "Failed to start p2p_scan"); 1052 p2p_set_state(p2p, P2P_IDLE); 1053 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1054 } 1055 1056 return res; 1057} 1058 1059 1060void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq) 1061{ 1062 p2p_dbg(p2p, "Stopping find"); 1063 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1064 p2p_clear_timeout(p2p); 1065 if (p2p->state == P2P_SEARCH) 1066 p2p->cfg->find_stopped(p2p->cfg->cb_ctx); 1067 p2p_set_state(p2p, P2P_IDLE); 1068 p2p_free_req_dev_types(p2p); 1069 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1070 if (p2p->go_neg_peer) 1071 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1072 p2p->go_neg_peer = NULL; 1073 p2p->sd_peer = NULL; 1074 p2p->invite_peer = NULL; 1075 p2p_stop_listen_for_freq(p2p, freq); 1076} 1077 1078 1079void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq) 1080{ 1081 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) { 1082 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response"); 1083 return; 1084 } 1085 if (p2p->in_listen) { 1086 p2p->in_listen = 0; 1087 p2p_clear_timeout(p2p); 1088 } 1089 if (p2p->drv_in_listen) { 1090 /* 1091 * The driver may not deliver callback to p2p_listen_end() 1092 * when the operation gets canceled, so clear the internal 1093 * variable that is tracking driver state. 1094 */ 1095 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen); 1096 p2p->drv_in_listen = 0; 1097 } 1098 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1099} 1100 1101 1102void p2p_stop_listen(struct p2p_data *p2p) 1103{ 1104 if (p2p->state != P2P_LISTEN_ONLY) { 1105 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state."); 1106 return; 1107 } 1108 1109 p2p_stop_listen_for_freq(p2p, 0); 1110 p2p_set_state(p2p, P2P_IDLE); 1111} 1112 1113 1114void p2p_stop_find(struct p2p_data *p2p) 1115{ 1116 p2p_stop_find_for_freq(p2p, 0); 1117} 1118 1119 1120static int p2p_prepare_channel_pref(struct p2p_data *p2p, 1121 unsigned int force_freq, 1122 unsigned int pref_freq, int go) 1123{ 1124 u8 op_class, op_channel; 1125 unsigned int freq = force_freq ? force_freq : pref_freq; 1126 1127 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d", 1128 force_freq, pref_freq, go); 1129 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) { 1130 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq); 1131 return -1; 1132 } 1133 1134 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) && 1135 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class, 1136 op_channel))) { 1137 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P", 1138 freq, op_class, op_channel); 1139 return -1; 1140 } 1141 1142 p2p->op_reg_class = op_class; 1143 p2p->op_channel = op_channel; 1144 1145 if (force_freq) { 1146 p2p->channels.reg_classes = 1; 1147 p2p->channels.reg_class[0].channels = 1; 1148 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 1149 p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 1150 } else { 1151 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1152 sizeof(struct p2p_channels)); 1153 } 1154 1155 return 0; 1156} 1157 1158 1159static void p2p_prepare_channel_best(struct p2p_data *p2p) 1160{ 1161 u8 op_class, op_channel; 1162 const int op_classes_5ghz[] = { 124, 115, 0 }; 1163 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 }; 1164 const int op_classes_vht[] = { 128, 0 }; 1165 1166 p2p_dbg(p2p, "Prepare channel best"); 1167 1168 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 && 1169 p2p_supported_freq(p2p, p2p->best_freq_overall) && 1170 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel) 1171 == 0) { 1172 p2p_dbg(p2p, "Select best overall channel as operating channel preference"); 1173 p2p->op_reg_class = op_class; 1174 p2p->op_channel = op_channel; 1175 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 && 1176 p2p_supported_freq(p2p, p2p->best_freq_5) && 1177 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel) 1178 == 0) { 1179 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference"); 1180 p2p->op_reg_class = op_class; 1181 p2p->op_channel = op_channel; 1182 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 && 1183 p2p_supported_freq(p2p, p2p->best_freq_24) && 1184 p2p_freq_to_channel(p2p->best_freq_24, &op_class, 1185 &op_channel) == 0) { 1186 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference"); 1187 p2p->op_reg_class = op_class; 1188 p2p->op_channel = op_channel; 1189 } else if (p2p->cfg->num_pref_chan > 0 && 1190 p2p_channels_includes(&p2p->cfg->channels, 1191 p2p->cfg->pref_chan[0].op_class, 1192 p2p->cfg->pref_chan[0].chan)) { 1193 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference"); 1194 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class; 1195 p2p->op_channel = p2p->cfg->pref_chan[0].chan; 1196 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht, 1197 &p2p->op_reg_class, &p2p->op_channel) == 1198 0) { 1199 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference", 1200 p2p->op_reg_class, p2p->op_channel); 1201 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40, 1202 &p2p->op_reg_class, &p2p->op_channel) == 1203 0) { 1204 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference", 1205 p2p->op_reg_class, p2p->op_channel); 1206 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz, 1207 &p2p->op_reg_class, &p2p->op_channel) == 1208 0) { 1209 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference", 1210 p2p->op_reg_class, p2p->op_channel); 1211 } else { 1212 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference"); 1213 p2p->op_reg_class = p2p->cfg->op_reg_class; 1214 p2p->op_channel = p2p->cfg->op_channel; 1215 } 1216 1217 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1218 sizeof(struct p2p_channels)); 1219} 1220 1221 1222/** 1223 * p2p_prepare_channel - Select operating channel for GO Negotiation 1224 * @p2p: P2P module context from p2p_init() 1225 * @dev: Selected peer device 1226 * @force_freq: Forced frequency in MHz or 0 if not forced 1227 * @pref_freq: Preferred frequency in MHz or 0 if no preference 1228 * @go: Whether the local end will be forced to be GO 1229 * Returns: 0 on success, -1 on failure (channel not supported for P2P) 1230 * 1231 * This function is used to do initial operating channel selection for GO 1232 * Negotiation prior to having received peer information. The selected channel 1233 * may be further optimized in p2p_reselect_channel() once the peer information 1234 * is available. 1235 */ 1236int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev, 1237 unsigned int force_freq, unsigned int pref_freq, int go) 1238{ 1239 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d", 1240 force_freq, pref_freq, go); 1241 if (force_freq || pref_freq) { 1242 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) < 1243 0) 1244 return -1; 1245 } else { 1246 p2p_prepare_channel_best(p2p); 1247 } 1248 p2p_channels_dump(p2p, "prepared channels", &p2p->channels); 1249 if (go) 1250 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq); 1251 else if (!force_freq) 1252 p2p_channels_union(&p2p->channels, &p2p->cfg->cli_channels, 1253 &p2p->channels); 1254 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels); 1255 1256 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s", 1257 p2p->op_reg_class, p2p->op_channel, 1258 force_freq ? " (forced)" : ""); 1259 1260 if (force_freq) 1261 dev->flags |= P2P_DEV_FORCE_FREQ; 1262 else 1263 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1264 1265 return 0; 1266} 1267 1268 1269static void p2p_set_dev_persistent(struct p2p_device *dev, 1270 int persistent_group) 1271{ 1272 switch (persistent_group) { 1273 case 0: 1274 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP | 1275 P2P_DEV_PREFER_PERSISTENT_RECONN); 1276 break; 1277 case 1: 1278 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP; 1279 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN; 1280 break; 1281 case 2: 1282 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP | 1283 P2P_DEV_PREFER_PERSISTENT_RECONN; 1284 break; 1285 } 1286} 1287 1288 1289int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr, 1290 enum p2p_wps_method wps_method, 1291 int go_intent, const u8 *own_interface_addr, 1292 unsigned int force_freq, int persistent_group, 1293 const u8 *force_ssid, size_t force_ssid_len, 1294 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id) 1295{ 1296 struct p2p_device *dev; 1297 1298 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR 1299 " GO Intent=%d Intended Interface Address=" MACSTR 1300 " wps_method=%d persistent_group=%d pd_before_go_neg=%d " 1301 "oob_pw_id=%u", 1302 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1303 wps_method, persistent_group, pd_before_go_neg, oob_pw_id); 1304 1305 dev = p2p_get_device(p2p, peer_addr); 1306 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 1307 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR, 1308 MAC2STR(peer_addr)); 1309 return -1; 1310 } 1311 1312 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, 1313 go_intent == 15) < 0) 1314 return -1; 1315 1316 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 1317 if (!(dev->info.dev_capab & 1318 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 1319 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1320 " that is in a group and is not discoverable", 1321 MAC2STR(peer_addr)); 1322 return -1; 1323 } 1324 if (dev->oper_freq <= 0) { 1325 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1326 " with incomplete information", 1327 MAC2STR(peer_addr)); 1328 return -1; 1329 } 1330 1331 /* 1332 * First, try to connect directly. If the peer does not 1333 * acknowledge frames, assume it is sleeping and use device 1334 * discoverability via the GO at that point. 1335 */ 1336 } 1337 1338 p2p->ssid_set = 0; 1339 if (force_ssid) { 1340 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1341 force_ssid, force_ssid_len); 1342 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1343 p2p->ssid_len = force_ssid_len; 1344 p2p->ssid_set = 1; 1345 } 1346 1347 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1348 dev->flags &= ~P2P_DEV_USER_REJECTED; 1349 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 1350 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1351 if (pd_before_go_neg) 1352 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG; 1353 else { 1354 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG; 1355 /* 1356 * Assign dialog token and tie breaker here to use the same 1357 * values in each retry within the same GO Negotiation exchange. 1358 */ 1359 dev->dialog_token++; 1360 if (dev->dialog_token == 0) 1361 dev->dialog_token = 1; 1362 dev->tie_breaker = p2p->next_tie_breaker; 1363 p2p->next_tie_breaker = !p2p->next_tie_breaker; 1364 } 1365 dev->connect_reqs = 0; 1366 dev->go_neg_req_sent = 0; 1367 dev->go_state = UNKNOWN_GO; 1368 p2p_set_dev_persistent(dev, persistent_group); 1369 p2p->go_intent = go_intent; 1370 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1371 1372 if (p2p->state != P2P_IDLE) 1373 p2p_stop_find(p2p); 1374 1375 if (p2p->after_scan_tx) { 1376 /* 1377 * We need to drop the pending frame to avoid issues with the 1378 * new GO Negotiation, e.g., when the pending frame was from a 1379 * previous attempt at starting a GO Negotiation. 1380 */ 1381 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion"); 1382 os_free(p2p->after_scan_tx); 1383 p2p->after_scan_tx = NULL; 1384 } 1385 1386 dev->wps_method = wps_method; 1387 dev->oob_pw_id = oob_pw_id; 1388 dev->status = P2P_SC_SUCCESS; 1389 1390 if (p2p->p2p_scan_running) { 1391 p2p_dbg(p2p, "p2p_scan running - delay connect send"); 1392 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT; 1393 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN); 1394 return 0; 1395 } 1396 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1397 1398 return p2p_connect_send(p2p, dev); 1399} 1400 1401 1402int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr, 1403 enum p2p_wps_method wps_method, 1404 int go_intent, const u8 *own_interface_addr, 1405 unsigned int force_freq, int persistent_group, 1406 const u8 *force_ssid, size_t force_ssid_len, 1407 unsigned int pref_freq, u16 oob_pw_id) 1408{ 1409 struct p2p_device *dev; 1410 1411 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR 1412 " GO Intent=%d Intended Interface Address=" MACSTR 1413 " wps_method=%d persistent_group=%d oob_pw_id=%u", 1414 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1415 wps_method, persistent_group, oob_pw_id); 1416 1417 dev = p2p_get_device(p2p, peer_addr); 1418 if (dev == NULL) { 1419 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR, 1420 MAC2STR(peer_addr)); 1421 return -1; 1422 } 1423 1424 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent == 1425 15) < 0) 1426 return -1; 1427 1428 p2p->ssid_set = 0; 1429 if (force_ssid) { 1430 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1431 force_ssid, force_ssid_len); 1432 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1433 p2p->ssid_len = force_ssid_len; 1434 p2p->ssid_set = 1; 1435 } 1436 1437 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1438 dev->flags &= ~P2P_DEV_USER_REJECTED; 1439 dev->go_neg_req_sent = 0; 1440 dev->go_state = UNKNOWN_GO; 1441 p2p_set_dev_persistent(dev, persistent_group); 1442 p2p->go_intent = go_intent; 1443 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1444 1445 dev->wps_method = wps_method; 1446 dev->oob_pw_id = oob_pw_id; 1447 dev->status = P2P_SC_SUCCESS; 1448 1449 return 0; 1450} 1451 1452 1453void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr, 1454 struct p2p_device *dev, struct p2p_message *msg) 1455{ 1456 os_get_reltime(&dev->last_seen); 1457 1458 p2p_copy_wps_info(p2p, dev, 0, msg); 1459 1460 if (msg->listen_channel) { 1461 int freq; 1462 freq = p2p_channel_to_freq(msg->listen_channel[3], 1463 msg->listen_channel[4]); 1464 if (freq < 0) { 1465 p2p_dbg(p2p, "Unknown peer Listen channel: " 1466 "country=%c%c(0x%02x) reg_class=%u channel=%u", 1467 msg->listen_channel[0], 1468 msg->listen_channel[1], 1469 msg->listen_channel[2], 1470 msg->listen_channel[3], 1471 msg->listen_channel[4]); 1472 } else { 1473 p2p_dbg(p2p, "Update peer " MACSTR 1474 " Listen channel: %u -> %u MHz", 1475 MAC2STR(dev->info.p2p_device_addr), 1476 dev->listen_freq, freq); 1477 dev->listen_freq = freq; 1478 } 1479 } 1480 1481 if (msg->wfd_subelems) { 1482 wpabuf_free(dev->info.wfd_subelems); 1483 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems); 1484 } 1485 1486 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 1487 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 1488 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request"); 1489 } else { 1490 p2p_dbg(p2p, "Created device entry based on GO Neg Req: " 1491 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' " 1492 "listen_freq=%d", 1493 MAC2STR(dev->info.p2p_device_addr), 1494 dev->info.dev_capab, dev->info.group_capab, 1495 dev->info.device_name, dev->listen_freq); 1496 } 1497 1498 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY; 1499 1500 if (dev->flags & P2P_DEV_USER_REJECTED) { 1501 p2p_dbg(p2p, "Do not report rejected device"); 1502 return; 1503 } 1504 1505 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 1506 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 1507 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 1508} 1509 1510 1511void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len) 1512{ 1513 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 1514 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2); 1515 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2], 1516 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len); 1517 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len; 1518} 1519 1520 1521int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params) 1522{ 1523 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len); 1524 p2p_random(params->passphrase, 8); 1525 return 0; 1526} 1527 1528 1529void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer) 1530{ 1531 struct p2p_go_neg_results res; 1532 int go = peer->go_state == LOCAL_GO; 1533 struct p2p_channels intersection; 1534 int freqs; 1535 size_t i, j; 1536 1537 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)", 1538 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer"); 1539 1540 os_memset(&res, 0, sizeof(res)); 1541 res.role_go = go; 1542 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 1543 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 1544 res.wps_method = peer->wps_method; 1545 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 1546 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 1547 res.persistent_group = 2; 1548 else 1549 res.persistent_group = 1; 1550 } 1551 1552 if (go) { 1553 /* Setup AP mode for WPS provisioning */ 1554 res.freq = p2p_channel_to_freq(p2p->op_reg_class, 1555 p2p->op_channel); 1556 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1557 res.ssid_len = p2p->ssid_len; 1558 p2p_random(res.passphrase, 8); 1559 } else { 1560 res.freq = peer->oper_freq; 1561 if (p2p->ssid_len) { 1562 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1563 res.ssid_len = p2p->ssid_len; 1564 } 1565 } 1566 1567 p2p_channels_dump(p2p, "own channels", &p2p->channels); 1568 p2p_channels_dump(p2p, "peer channels", &peer->channels); 1569 p2p_channels_intersect(&p2p->channels, &peer->channels, 1570 &intersection); 1571 if (go) { 1572 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq); 1573 p2p_channels_dump(p2p, "intersection after no-GO removal", 1574 &intersection); 1575 } 1576 freqs = 0; 1577 for (i = 0; i < intersection.reg_classes; i++) { 1578 struct p2p_reg_class *c = &intersection.reg_class[i]; 1579 if (freqs + 1 == P2P_MAX_CHANNELS) 1580 break; 1581 for (j = 0; j < c->channels; j++) { 1582 int freq; 1583 if (freqs + 1 == P2P_MAX_CHANNELS) 1584 break; 1585 freq = p2p_channel_to_freq(c->reg_class, c->channel[j]); 1586 if (freq < 0) 1587 continue; 1588 res.freq_list[freqs++] = freq; 1589 } 1590 } 1591 1592 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout; 1593 1594 p2p_clear_timeout(p2p); 1595 p2p->ssid_set = 0; 1596 peer->go_neg_req_sent = 0; 1597 peer->wps_method = WPS_NOT_READY; 1598 peer->oob_pw_id = 0; 1599 1600 p2p_set_state(p2p, P2P_PROVISIONING); 1601 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 1602} 1603 1604 1605static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa, 1606 const u8 *data, size_t len, int rx_freq) 1607{ 1608 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa)); 1609 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len); 1610 1611 if (len < 1) 1612 return; 1613 1614 switch (data[0]) { 1615 case P2P_GO_NEG_REQ: 1616 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq); 1617 break; 1618 case P2P_GO_NEG_RESP: 1619 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq); 1620 break; 1621 case P2P_GO_NEG_CONF: 1622 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1); 1623 break; 1624 case P2P_INVITATION_REQ: 1625 p2p_process_invitation_req(p2p, sa, data + 1, len - 1, 1626 rx_freq); 1627 break; 1628 case P2P_INVITATION_RESP: 1629 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 1630 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1); 1631 break; 1632 case P2P_PROV_DISC_REQ: 1633 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1634 break; 1635 case P2P_PROV_DISC_RESP: 1636 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1); 1637 break; 1638 case P2P_DEV_DISC_REQ: 1639 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1640 break; 1641 case P2P_DEV_DISC_RESP: 1642 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1); 1643 break; 1644 default: 1645 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d", 1646 data[0]); 1647 break; 1648 } 1649} 1650 1651 1652static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, 1653 const u8 *sa, const u8 *bssid, const u8 *data, 1654 size_t len, int freq) 1655{ 1656 if (len < 1) 1657 return; 1658 1659 switch (data[0]) { 1660 case WLAN_PA_VENDOR_SPECIFIC: 1661 data++; 1662 len--; 1663 if (len < 3) 1664 return; 1665 if (WPA_GET_BE24(data) != OUI_WFA) 1666 return; 1667 1668 data += 3; 1669 len -= 3; 1670 if (len < 1) 1671 return; 1672 1673 if (*data != P2P_OUI_TYPE) 1674 return; 1675 1676 p2p_rx_p2p_action(p2p, sa, data + 1, len - 1, freq); 1677 break; 1678 case WLAN_PA_GAS_INITIAL_REQ: 1679 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq); 1680 break; 1681 case WLAN_PA_GAS_INITIAL_RESP: 1682 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq); 1683 break; 1684 case WLAN_PA_GAS_COMEBACK_REQ: 1685 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq); 1686 break; 1687 case WLAN_PA_GAS_COMEBACK_RESP: 1688 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq); 1689 break; 1690 } 1691} 1692 1693 1694void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa, 1695 const u8 *bssid, u8 category, 1696 const u8 *data, size_t len, int freq) 1697{ 1698 if (category == WLAN_ACTION_PUBLIC) { 1699 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq); 1700 return; 1701 } 1702 1703 if (category != WLAN_ACTION_VENDOR_SPECIFIC) 1704 return; 1705 1706 if (len < 4) 1707 return; 1708 1709 if (WPA_GET_BE24(data) != OUI_WFA) 1710 return; 1711 data += 3; 1712 len -= 3; 1713 1714 if (*data != P2P_OUI_TYPE) 1715 return; 1716 data++; 1717 len--; 1718 1719 /* P2P action frame */ 1720 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa)); 1721 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len); 1722 1723 if (len < 1) 1724 return; 1725 switch (data[0]) { 1726 case P2P_NOA: 1727 p2p_dbg(p2p, "Received P2P Action - Notice of Absence"); 1728 /* TODO */ 1729 break; 1730 case P2P_PRESENCE_REQ: 1731 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq); 1732 break; 1733 case P2P_PRESENCE_RESP: 1734 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1); 1735 break; 1736 case P2P_GO_DISC_REQ: 1737 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq); 1738 break; 1739 default: 1740 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]); 1741 break; 1742 } 1743} 1744 1745 1746static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx) 1747{ 1748 struct p2p_data *p2p = eloop_ctx; 1749 if (p2p->go_neg_peer == NULL) 1750 return; 1751 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1752 p2p->go_neg_peer->status = P2P_SC_SUCCESS; 1753 p2p_connect_send(p2p, p2p->go_neg_peer); 1754} 1755 1756 1757static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx) 1758{ 1759 struct p2p_data *p2p = eloop_ctx; 1760 if (p2p->invite_peer == NULL) 1761 return; 1762 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1763 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr, 1764 p2p->invite_dev_pw_id); 1765} 1766 1767 1768static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr, 1769 const u8 *ie, size_t ie_len) 1770{ 1771 struct p2p_message msg; 1772 struct p2p_device *dev; 1773 1774 os_memset(&msg, 0, sizeof(msg)); 1775 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL) 1776 { 1777 p2p_parse_free(&msg); 1778 return; /* not a P2P probe */ 1779 } 1780 1781 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 1782 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 1783 != 0) { 1784 /* The Probe Request is not part of P2P Device Discovery. It is 1785 * not known whether the source address of the frame is the P2P 1786 * Device Address or P2P Interface Address. Do not add a new 1787 * peer entry based on this frames. 1788 */ 1789 p2p_parse_free(&msg); 1790 return; 1791 } 1792 1793 dev = p2p_get_device(p2p, addr); 1794 if (dev) { 1795 if (dev->country[0] == 0 && msg.listen_channel) 1796 os_memcpy(dev->country, msg.listen_channel, 3); 1797 os_get_reltime(&dev->last_seen); 1798 p2p_parse_free(&msg); 1799 return; /* already known */ 1800 } 1801 1802 dev = p2p_create_device(p2p, addr); 1803 if (dev == NULL) { 1804 p2p_parse_free(&msg); 1805 return; 1806 } 1807 1808 os_get_reltime(&dev->last_seen); 1809 dev->flags |= P2P_DEV_PROBE_REQ_ONLY; 1810 1811 if (msg.listen_channel) { 1812 os_memcpy(dev->country, msg.listen_channel, 3); 1813 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3], 1814 msg.listen_channel[4]); 1815 } 1816 1817 p2p_copy_wps_info(p2p, dev, 1, &msg); 1818 1819 if (msg.wfd_subelems) { 1820 wpabuf_free(dev->info.wfd_subelems); 1821 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 1822 } 1823 1824 p2p_parse_free(&msg); 1825 1826 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR 1827 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d", 1828 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab, 1829 dev->info.group_capab, dev->info.device_name, 1830 dev->listen_freq); 1831} 1832 1833 1834struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p, 1835 const u8 *addr, 1836 struct p2p_message *msg) 1837{ 1838 struct p2p_device *dev; 1839 1840 dev = p2p_get_device(p2p, addr); 1841 if (dev) { 1842 os_get_reltime(&dev->last_seen); 1843 return dev; /* already known */ 1844 } 1845 1846 dev = p2p_create_device(p2p, addr); 1847 if (dev == NULL) 1848 return NULL; 1849 1850 p2p_add_dev_info(p2p, addr, dev, msg); 1851 1852 return dev; 1853} 1854 1855 1856static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type) 1857{ 1858 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0) 1859 return 1; 1860 if (os_memcmp(dev_type, req_dev_type, 2) == 0 && 1861 WPA_GET_BE32(&req_dev_type[2]) == 0 && 1862 WPA_GET_BE16(&req_dev_type[6]) == 0) 1863 return 1; /* Category match with wildcard OUI/sub-category */ 1864 return 0; 1865} 1866 1867 1868int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[], 1869 size_t num_req_dev_type) 1870{ 1871 size_t i; 1872 for (i = 0; i < num_req_dev_type; i++) { 1873 if (dev_type_match(dev_type, req_dev_type[i])) 1874 return 1; 1875 } 1876 return 0; 1877} 1878 1879 1880/** 1881 * p2p_match_dev_type - Match local device type with requested type 1882 * @p2p: P2P module context from p2p_init() 1883 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) 1884 * Returns: 1 on match, 0 on mismatch 1885 * 1886 * This function can be used to match the Requested Device Type attribute in 1887 * WPS IE with the local device types for deciding whether to reply to a Probe 1888 * Request frame. 1889 */ 1890int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps) 1891{ 1892 struct wps_parse_attr attr; 1893 size_t i; 1894 1895 if (wps_parse_msg(wps, &attr)) 1896 return 1; /* assume no Requested Device Type attributes */ 1897 1898 if (attr.num_req_dev_type == 0) 1899 return 1; /* no Requested Device Type attributes -> match */ 1900 1901 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type, 1902 attr.num_req_dev_type)) 1903 return 1; /* Own Primary Device Type matches */ 1904 1905 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) 1906 if (dev_type_list_match(p2p->cfg->sec_dev_type[i], 1907 attr.req_dev_type, 1908 attr.num_req_dev_type)) 1909 return 1; /* Own Secondary Device Type matches */ 1910 1911 /* No matching device type found */ 1912 return 0; 1913} 1914 1915 1916struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p) 1917{ 1918 struct wpabuf *buf; 1919 u8 *len; 1920 int pw_id = -1; 1921 size_t extra = 0; 1922 1923#ifdef CONFIG_WIFI_DISPLAY 1924 if (p2p->wfd_ie_probe_resp) 1925 extra = wpabuf_len(p2p->wfd_ie_probe_resp); 1926#endif /* CONFIG_WIFI_DISPLAY */ 1927 1928 buf = wpabuf_alloc(1000 + extra); 1929 if (buf == NULL) 1930 return NULL; 1931 1932 if (p2p->go_neg_peer) { 1933 /* Advertise immediate availability of WPS credential */ 1934 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method); 1935 } 1936 1937 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) { 1938 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response"); 1939 wpabuf_free(buf); 1940 return NULL; 1941 } 1942 1943#ifdef CONFIG_WIFI_DISPLAY 1944 if (p2p->wfd_ie_probe_resp) 1945 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp); 1946#endif /* CONFIG_WIFI_DISPLAY */ 1947 1948 /* P2P IE */ 1949 len = p2p_buf_add_ie_hdr(buf); 1950 p2p_buf_add_capability(buf, p2p->dev_capab & 1951 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 1952 if (p2p->ext_listen_interval) 1953 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 1954 p2p->ext_listen_interval); 1955 p2p_buf_add_device_info(buf, p2p, NULL); 1956 p2p_buf_update_ie_hdr(buf, len); 1957 1958 return buf; 1959} 1960 1961 1962static enum p2p_probe_req_status 1963p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 1964 const u8 *bssid, const u8 *ie, size_t ie_len) 1965{ 1966 struct ieee802_11_elems elems; 1967 struct wpabuf *buf; 1968 struct ieee80211_mgmt *resp; 1969 struct p2p_message msg; 1970 struct wpabuf *ies; 1971 1972 if (!p2p->in_listen || !p2p->drv_in_listen) { 1973 /* not in Listen state - ignore Probe Request */ 1974 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request", 1975 p2p->in_listen, p2p->drv_in_listen); 1976 return P2P_PREQ_NOT_LISTEN; 1977 } 1978 1979 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) == 1980 ParseFailed) { 1981 /* Ignore invalid Probe Request frames */ 1982 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it"); 1983 return P2P_PREQ_MALFORMED; 1984 } 1985 1986 if (elems.p2p == NULL) { 1987 /* not a P2P probe - ignore it */ 1988 p2p_dbg(p2p, "Not a P2P probe - ignore it"); 1989 return P2P_PREQ_NOT_P2P; 1990 } 1991 1992 if (dst && !is_broadcast_ether_addr(dst) && 1993 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 1994 /* Not sent to the broadcast address or our P2P Device Address 1995 */ 1996 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it", 1997 MAC2STR(dst)); 1998 return P2P_PREQ_NOT_PROCESSED; 1999 } 2000 2001 if (bssid && !is_broadcast_ether_addr(bssid)) { 2002 /* Not sent to the Wildcard BSSID */ 2003 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it", 2004 MAC2STR(bssid)); 2005 return P2P_PREQ_NOT_PROCESSED; 2006 } 2007 2008 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN || 2009 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) != 2010 0) { 2011 /* not using P2P Wildcard SSID - ignore */ 2012 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it"); 2013 return P2P_PREQ_NOT_PROCESSED; 2014 } 2015 2016 if (supp_rates_11b_only(&elems)) { 2017 /* Indicates support for 11b rates only */ 2018 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it"); 2019 return P2P_PREQ_NOT_P2P; 2020 } 2021 2022 os_memset(&msg, 0, sizeof(msg)); 2023 if (p2p_parse_ies(ie, ie_len, &msg) < 0) { 2024 /* Could not parse P2P attributes */ 2025 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it"); 2026 return P2P_PREQ_NOT_P2P; 2027 } 2028 2029 if (msg.device_id && 2030 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2031 /* Device ID did not match */ 2032 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it", 2033 MAC2STR(msg.device_id)); 2034 p2p_parse_free(&msg); 2035 return P2P_PREQ_NOT_PROCESSED; 2036 } 2037 2038 /* Check Requested Device Type match */ 2039 if (msg.wps_attributes && 2040 !p2p_match_dev_type(p2p, msg.wps_attributes)) { 2041 /* No match with Requested Device Type */ 2042 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it"); 2043 p2p_parse_free(&msg); 2044 return P2P_PREQ_NOT_PROCESSED; 2045 } 2046 p2p_parse_free(&msg); 2047 2048 if (!p2p->cfg->send_probe_resp) { 2049 /* Response generated elsewhere */ 2050 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response"); 2051 return P2P_PREQ_NOT_PROCESSED; 2052 } 2053 2054 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state"); 2055 2056 /* 2057 * We do not really have a specific BSS that this frame is advertising, 2058 * so build a frame that has some information in valid format. This is 2059 * really only used for discovery purposes, not to learn exact BSS 2060 * parameters. 2061 */ 2062 ies = p2p_build_probe_resp_ies(p2p); 2063 if (ies == NULL) 2064 return P2P_PREQ_NOT_PROCESSED; 2065 2066 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 2067 if (buf == NULL) { 2068 wpabuf_free(ies); 2069 return P2P_PREQ_NOT_PROCESSED; 2070 } 2071 2072 resp = NULL; 2073 resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp); 2074 2075 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 2076 (WLAN_FC_STYPE_PROBE_RESP << 4)); 2077 os_memcpy(resp->da, addr, ETH_ALEN); 2078 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN); 2079 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN); 2080 resp->u.probe_resp.beacon_int = host_to_le16(100); 2081 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 2082 resp->u.probe_resp.capab_info = 2083 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE | 2084 WLAN_CAPABILITY_PRIVACY | 2085 WLAN_CAPABILITY_SHORT_SLOT_TIME); 2086 2087 wpabuf_put_u8(buf, WLAN_EID_SSID); 2088 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN); 2089 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 2090 2091 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES); 2092 wpabuf_put_u8(buf, 8); 2093 wpabuf_put_u8(buf, (60 / 5) | 0x80); 2094 wpabuf_put_u8(buf, 90 / 5); 2095 wpabuf_put_u8(buf, (120 / 5) | 0x80); 2096 wpabuf_put_u8(buf, 180 / 5); 2097 wpabuf_put_u8(buf, (240 / 5) | 0x80); 2098 wpabuf_put_u8(buf, 360 / 5); 2099 wpabuf_put_u8(buf, 480 / 5); 2100 wpabuf_put_u8(buf, 540 / 5); 2101 2102 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS); 2103 wpabuf_put_u8(buf, 1); 2104 wpabuf_put_u8(buf, p2p->cfg->channel); 2105 2106 wpabuf_put_buf(buf, ies); 2107 wpabuf_free(ies); 2108 2109 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf); 2110 2111 wpabuf_free(buf); 2112 2113 return P2P_PREQ_NOT_PROCESSED; 2114} 2115 2116 2117enum p2p_probe_req_status 2118p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2119 const u8 *bssid, const u8 *ie, size_t ie_len) 2120{ 2121 enum p2p_probe_req_status res; 2122 2123 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len); 2124 2125 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len); 2126 2127 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) && 2128 p2p->go_neg_peer && 2129 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN) 2130 == 0 && 2131 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 2132 /* Received a Probe Request from GO Negotiation peer */ 2133 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout"); 2134 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2135 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL); 2136 return P2P_PREQ_PROCESSED; 2137 } 2138 2139 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) && 2140 p2p->invite_peer && 2141 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) && 2142 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN) 2143 == 0) { 2144 /* Received a Probe Request from Invite peer */ 2145 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout"); 2146 eloop_cancel_timeout(p2p_invite_start, p2p, NULL); 2147 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL); 2148 return P2P_PREQ_PROCESSED; 2149 } 2150 2151 return res; 2152} 2153 2154 2155static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid, 2156 u8 *buf, size_t len, struct wpabuf *p2p_ie) 2157{ 2158 struct wpabuf *tmp; 2159 u8 *lpos; 2160 size_t tmplen; 2161 int res; 2162 u8 group_capab; 2163 2164 if (p2p_ie == NULL) 2165 return 0; /* WLAN AP is not a P2P manager */ 2166 2167 /* 2168 * (Re)Association Request - P2P IE 2169 * P2P Capability attribute (shall be present) 2170 * P2P Interface attribute (present if concurrent device and 2171 * P2P Management is enabled) 2172 */ 2173 tmp = wpabuf_alloc(200); 2174 if (tmp == NULL) 2175 return -1; 2176 2177 lpos = p2p_buf_add_ie_hdr(tmp); 2178 group_capab = 0; 2179 if (p2p->num_groups > 0) { 2180 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; 2181 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2182 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) && 2183 p2p->cross_connect) 2184 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 2185 } 2186 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab); 2187 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2188 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED)) 2189 p2p_buf_add_p2p_interface(tmp, p2p); 2190 p2p_buf_update_ie_hdr(tmp, lpos); 2191 2192 tmplen = wpabuf_len(tmp); 2193 if (tmplen > len) 2194 res = -1; 2195 else { 2196 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2197 res = tmplen; 2198 } 2199 wpabuf_free(tmp); 2200 2201 return res; 2202} 2203 2204 2205int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf, 2206 size_t len, int p2p_group, struct wpabuf *p2p_ie) 2207{ 2208 struct wpabuf *tmp; 2209 u8 *lpos; 2210 struct p2p_device *peer; 2211 size_t tmplen; 2212 int res; 2213 size_t extra = 0; 2214 2215 if (!p2p_group) 2216 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie); 2217 2218#ifdef CONFIG_WIFI_DISPLAY 2219 if (p2p->wfd_ie_assoc_req) 2220 extra = wpabuf_len(p2p->wfd_ie_assoc_req); 2221#endif /* CONFIG_WIFI_DISPLAY */ 2222 2223 /* 2224 * (Re)Association Request - P2P IE 2225 * P2P Capability attribute (shall be present) 2226 * Extended Listen Timing (may be present) 2227 * P2P Device Info attribute (shall be present) 2228 */ 2229 tmp = wpabuf_alloc(200 + extra); 2230 if (tmp == NULL) 2231 return -1; 2232 2233#ifdef CONFIG_WIFI_DISPLAY 2234 if (p2p->wfd_ie_assoc_req) 2235 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req); 2236#endif /* CONFIG_WIFI_DISPLAY */ 2237 2238 peer = bssid ? p2p_get_device(p2p, bssid) : NULL; 2239 2240 lpos = p2p_buf_add_ie_hdr(tmp); 2241 p2p_buf_add_capability(tmp, p2p->dev_capab, 0); 2242 if (p2p->ext_listen_interval) 2243 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period, 2244 p2p->ext_listen_interval); 2245 p2p_buf_add_device_info(tmp, p2p, peer); 2246 p2p_buf_update_ie_hdr(tmp, lpos); 2247 2248 tmplen = wpabuf_len(tmp); 2249 if (tmplen > len) 2250 res = -1; 2251 else { 2252 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2253 res = tmplen; 2254 } 2255 wpabuf_free(tmp); 2256 2257 return res; 2258} 2259 2260 2261int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) 2262{ 2263 struct wpabuf *p2p_ie; 2264 int ret; 2265 2266 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); 2267 if (p2p_ie == NULL) 2268 return 0; 2269 2270 ret = p2p_attr_text(p2p_ie, buf, end); 2271 wpabuf_free(p2p_ie); 2272 return ret; 2273} 2274 2275 2276int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr) 2277{ 2278 struct p2p_message msg; 2279 2280 os_memset(&msg, 0, sizeof(msg)); 2281 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 2282 return -1; 2283 2284 if (msg.p2p_device_addr) { 2285 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); 2286 return 0; 2287 } else if (msg.device_id) { 2288 os_memcpy(dev_addr, msg.device_id, ETH_ALEN); 2289 return 0; 2290 } 2291 return -1; 2292} 2293 2294 2295int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr) 2296{ 2297 struct wpabuf *p2p_ie; 2298 int ret; 2299 2300 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 2301 P2P_IE_VENDOR_TYPE); 2302 if (p2p_ie == NULL) 2303 return -1; 2304 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr); 2305 wpabuf_free(p2p_ie); 2306 return ret; 2307} 2308 2309 2310static void p2p_clear_go_neg(struct p2p_data *p2p) 2311{ 2312 p2p->go_neg_peer = NULL; 2313 p2p_clear_timeout(p2p); 2314 p2p_set_state(p2p, P2P_IDLE); 2315} 2316 2317 2318void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr) 2319{ 2320 if (p2p->go_neg_peer == NULL) { 2321 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification"); 2322 return; /* No pending Group Formation */ 2323 } 2324 2325 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) != 2326 0) { 2327 p2p_dbg(p2p, "Ignore WPS registration success notification for " 2328 MACSTR " (GO Negotiation peer " MACSTR ")", 2329 MAC2STR(mac_addr), 2330 MAC2STR(p2p->go_neg_peer->intended_addr)); 2331 return; /* Ignore unexpected peer address */ 2332 } 2333 2334 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR, 2335 MAC2STR(mac_addr)); 2336 2337 p2p_clear_go_neg(p2p); 2338} 2339 2340 2341void p2p_group_formation_failed(struct p2p_data *p2p) 2342{ 2343 if (p2p->go_neg_peer == NULL) { 2344 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification"); 2345 return; /* No pending Group Formation */ 2346 } 2347 2348 p2p_dbg(p2p, "Group Formation failed with " MACSTR, 2349 MAC2STR(p2p->go_neg_peer->intended_addr)); 2350 2351 p2p_clear_go_neg(p2p); 2352} 2353 2354 2355struct p2p_data * p2p_init(const struct p2p_config *cfg) 2356{ 2357 struct p2p_data *p2p; 2358 2359 if (cfg->max_peers < 1) 2360 return NULL; 2361 2362 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg)); 2363 if (p2p == NULL) 2364 return NULL; 2365 p2p->cfg = (struct p2p_config *) (p2p + 1); 2366 os_memcpy(p2p->cfg, cfg, sizeof(*cfg)); 2367 if (cfg->dev_name) 2368 p2p->cfg->dev_name = os_strdup(cfg->dev_name); 2369 if (cfg->manufacturer) 2370 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer); 2371 if (cfg->model_name) 2372 p2p->cfg->model_name = os_strdup(cfg->model_name); 2373 if (cfg->model_number) 2374 p2p->cfg->model_number = os_strdup(cfg->model_number); 2375 if (cfg->serial_number) 2376 p2p->cfg->serial_number = os_strdup(cfg->serial_number); 2377 if (cfg->pref_chan) { 2378 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan * 2379 sizeof(struct p2p_channel)); 2380 if (p2p->cfg->pref_chan) { 2381 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan, 2382 cfg->num_pref_chan * 2383 sizeof(struct p2p_channel)); 2384 } else 2385 p2p->cfg->num_pref_chan = 0; 2386 } 2387 2388 p2p->min_disc_int = 1; 2389 p2p->max_disc_int = 3; 2390 p2p->max_disc_tu = -1; 2391 2392 os_get_random(&p2p->next_tie_breaker, 1); 2393 p2p->next_tie_breaker &= 0x01; 2394 if (cfg->sd_request) 2395 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 2396 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE; 2397 if (cfg->concurrent_operations) 2398 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER; 2399 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 2400 2401 dl_list_init(&p2p->devices); 2402 2403 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 2404 p2p_expiration_timeout, p2p, NULL); 2405 2406 p2p->go_timeout = 100; 2407 p2p->client_timeout = 20; 2408 p2p->num_p2p_sd_queries = 0; 2409 2410 p2p_dbg(p2p, "initialized"); 2411 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 2412 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 2413 2414 return p2p; 2415} 2416 2417 2418void p2p_deinit(struct p2p_data *p2p) 2419{ 2420#ifdef CONFIG_WIFI_DISPLAY 2421 wpabuf_free(p2p->wfd_ie_beacon); 2422 wpabuf_free(p2p->wfd_ie_probe_req); 2423 wpabuf_free(p2p->wfd_ie_probe_resp); 2424 wpabuf_free(p2p->wfd_ie_assoc_req); 2425 wpabuf_free(p2p->wfd_ie_invitation); 2426 wpabuf_free(p2p->wfd_ie_prov_disc_req); 2427 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 2428 wpabuf_free(p2p->wfd_ie_go_neg); 2429 wpabuf_free(p2p->wfd_dev_info); 2430 wpabuf_free(p2p->wfd_assoc_bssid); 2431 wpabuf_free(p2p->wfd_coupled_sink_info); 2432#endif /* CONFIG_WIFI_DISPLAY */ 2433 2434 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL); 2435 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 2436 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2437 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2438 p2p_flush(p2p); 2439 p2p_free_req_dev_types(p2p); 2440 os_free(p2p->cfg->dev_name); 2441 os_free(p2p->cfg->manufacturer); 2442 os_free(p2p->cfg->model_name); 2443 os_free(p2p->cfg->model_number); 2444 os_free(p2p->cfg->serial_number); 2445 os_free(p2p->cfg->pref_chan); 2446 os_free(p2p->groups); 2447 wpabuf_free(p2p->sd_resp); 2448 os_free(p2p->after_scan_tx); 2449 p2p_remove_wps_vendor_extensions(p2p); 2450 os_free(p2p->no_go_freq.range); 2451 os_free(p2p); 2452} 2453 2454 2455void p2p_flush(struct p2p_data *p2p) 2456{ 2457 struct p2p_device *dev, *prev; 2458 p2p_stop_find(p2p); 2459 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device, 2460 list) { 2461 dl_list_del(&dev->list); 2462 p2p_device_free(p2p, dev); 2463 } 2464 p2p_free_sd_queries(p2p); 2465 os_free(p2p->after_scan_tx); 2466 p2p->after_scan_tx = NULL; 2467} 2468 2469 2470int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr) 2471{ 2472 struct p2p_device *dev; 2473 2474 dev = p2p_get_device(p2p, addr); 2475 if (dev == NULL) 2476 return -1; 2477 2478 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr)); 2479 2480 if (p2p->go_neg_peer == dev) 2481 p2p->go_neg_peer = NULL; 2482 2483 dev->wps_method = WPS_NOT_READY; 2484 dev->oob_pw_id = 0; 2485 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 2486 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 2487 2488 /* Check if after_scan_tx is for this peer. If so free it */ 2489 if (p2p->after_scan_tx && 2490 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) { 2491 os_free(p2p->after_scan_tx); 2492 p2p->after_scan_tx = NULL; 2493 } 2494 2495 return 0; 2496} 2497 2498 2499int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name) 2500{ 2501 os_free(p2p->cfg->dev_name); 2502 if (dev_name) { 2503 p2p->cfg->dev_name = os_strdup(dev_name); 2504 if (p2p->cfg->dev_name == NULL) 2505 return -1; 2506 } else 2507 p2p->cfg->dev_name = NULL; 2508 return 0; 2509} 2510 2511 2512int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer) 2513{ 2514 os_free(p2p->cfg->manufacturer); 2515 p2p->cfg->manufacturer = NULL; 2516 if (manufacturer) { 2517 p2p->cfg->manufacturer = os_strdup(manufacturer); 2518 if (p2p->cfg->manufacturer == NULL) 2519 return -1; 2520 } 2521 2522 return 0; 2523} 2524 2525 2526int p2p_set_model_name(struct p2p_data *p2p, const char *model_name) 2527{ 2528 os_free(p2p->cfg->model_name); 2529 p2p->cfg->model_name = NULL; 2530 if (model_name) { 2531 p2p->cfg->model_name = os_strdup(model_name); 2532 if (p2p->cfg->model_name == NULL) 2533 return -1; 2534 } 2535 2536 return 0; 2537} 2538 2539 2540int p2p_set_model_number(struct p2p_data *p2p, const char *model_number) 2541{ 2542 os_free(p2p->cfg->model_number); 2543 p2p->cfg->model_number = NULL; 2544 if (model_number) { 2545 p2p->cfg->model_number = os_strdup(model_number); 2546 if (p2p->cfg->model_number == NULL) 2547 return -1; 2548 } 2549 2550 return 0; 2551} 2552 2553 2554int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number) 2555{ 2556 os_free(p2p->cfg->serial_number); 2557 p2p->cfg->serial_number = NULL; 2558 if (serial_number) { 2559 p2p->cfg->serial_number = os_strdup(serial_number); 2560 if (p2p->cfg->serial_number == NULL) 2561 return -1; 2562 } 2563 2564 return 0; 2565} 2566 2567 2568void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods) 2569{ 2570 p2p->cfg->config_methods = config_methods; 2571} 2572 2573 2574void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid) 2575{ 2576 os_memcpy(p2p->cfg->uuid, uuid, 16); 2577} 2578 2579 2580int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type) 2581{ 2582 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8); 2583 return 0; 2584} 2585 2586 2587int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8], 2588 size_t num_dev_types) 2589{ 2590 if (num_dev_types > P2P_SEC_DEVICE_TYPES) 2591 num_dev_types = P2P_SEC_DEVICE_TYPES; 2592 p2p->cfg->num_sec_dev_types = num_dev_types; 2593 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8); 2594 return 0; 2595} 2596 2597 2598void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p) 2599{ 2600 int i; 2601 2602 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2603 wpabuf_free(p2p->wps_vendor_ext[i]); 2604 p2p->wps_vendor_ext[i] = NULL; 2605 } 2606} 2607 2608 2609int p2p_add_wps_vendor_extension(struct p2p_data *p2p, 2610 const struct wpabuf *vendor_ext) 2611{ 2612 int i; 2613 2614 if (vendor_ext == NULL) 2615 return -1; 2616 2617 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2618 if (p2p->wps_vendor_ext[i] == NULL) 2619 break; 2620 } 2621 if (i >= P2P_MAX_WPS_VENDOR_EXT) 2622 return -1; 2623 2624 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext); 2625 if (p2p->wps_vendor_ext[i] == NULL) 2626 return -1; 2627 2628 return 0; 2629} 2630 2631 2632int p2p_set_country(struct p2p_data *p2p, const char *country) 2633{ 2634 os_memcpy(p2p->cfg->country, country, 3); 2635 return 0; 2636} 2637 2638 2639void p2p_continue_find(struct p2p_data *p2p) 2640{ 2641 struct p2p_device *dev; 2642 p2p_set_state(p2p, P2P_SEARCH); 2643 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2644 if (dev->sd_pending_bcast_queries == 0) { 2645 /* Initialize with total number of registered broadcast 2646 * SD queries. */ 2647 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries; 2648 } 2649 2650 if (p2p_start_sd(p2p, dev) == 0) 2651 return; 2652 if (dev->req_config_methods && 2653 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) { 2654 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 2655 MACSTR " (config methods 0x%x)", 2656 MAC2STR(dev->info.p2p_device_addr), 2657 dev->req_config_methods); 2658 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0) 2659 return; 2660 } 2661 } 2662 2663 p2p_listen_in_find(p2p, 1); 2664} 2665 2666 2667static void p2p_sd_cb(struct p2p_data *p2p, int success) 2668{ 2669 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d", 2670 success); 2671 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2672 2673 if (!success) { 2674 p2p->sd_peer = NULL; 2675 p2p_continue_find(p2p); 2676 return; 2677 } 2678 2679 if (p2p->sd_peer == NULL) { 2680 p2p_dbg(p2p, "No SD peer entry known"); 2681 p2p_continue_find(p2p); 2682 return; 2683 } 2684 2685 /* Wait for response from the peer */ 2686 p2p_set_state(p2p, P2P_SD_DURING_FIND); 2687 p2p_set_timeout(p2p, 0, 200000); 2688} 2689 2690 2691/** 2692 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state 2693 * @p2p: P2P module context from p2p_init() 2694 */ 2695static void p2p_retry_pd(struct p2p_data *p2p) 2696{ 2697 struct p2p_device *dev; 2698 2699 if (p2p->state != P2P_IDLE) 2700 return; 2701 2702 /* 2703 * Retry the prov disc req attempt only for the peer that the user had 2704 * requested. 2705 */ 2706 2707 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2708 if (os_memcmp(p2p->pending_pd_devaddr, 2709 dev->info.p2p_device_addr, ETH_ALEN) != 0) 2710 continue; 2711 if (!dev->req_config_methods) 2712 continue; 2713 2714 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 2715 MACSTR " (config methods 0x%x)", 2716 MAC2STR(dev->info.p2p_device_addr), 2717 dev->req_config_methods); 2718 p2p_send_prov_disc_req(p2p, dev, 2719 dev->flags & P2P_DEV_PD_FOR_JOIN, 2720 p2p->pd_force_freq); 2721 return; 2722 } 2723} 2724 2725 2726static void p2p_prov_disc_cb(struct p2p_data *p2p, int success) 2727{ 2728 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d", 2729 success); 2730 2731 /* 2732 * Postpone resetting the pending action state till after we actually 2733 * time out. This allows us to take some action like notifying any 2734 * interested parties about no response to the request. 2735 * 2736 * When the timer (below) goes off we check in IDLE, SEARCH, or 2737 * LISTEN_ONLY state, which are the only allowed states to issue a PD 2738 * requests in, if this was still pending and then raise notification. 2739 */ 2740 2741 if (!success) { 2742 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2743 2744 if (p2p->user_initiated_pd && 2745 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY)) 2746 { 2747 /* Retry request from timeout to avoid busy loops */ 2748 p2p->pending_action_state = P2P_PENDING_PD; 2749 p2p_set_timeout(p2p, 0, 50000); 2750 } else if (p2p->state != P2P_IDLE) 2751 p2p_continue_find(p2p); 2752 else if (p2p->user_initiated_pd) { 2753 p2p->pending_action_state = P2P_PENDING_PD; 2754 p2p_set_timeout(p2p, 0, 300000); 2755 } 2756 return; 2757 } 2758 2759 /* 2760 * This postponing, of resetting pending_action_state, needs to be 2761 * done only for user initiated PD requests and not internal ones. 2762 */ 2763 if (p2p->user_initiated_pd) 2764 p2p->pending_action_state = P2P_PENDING_PD; 2765 else 2766 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2767 2768 /* Wait for response from the peer */ 2769 if (p2p->state == P2P_SEARCH) 2770 p2p_set_state(p2p, P2P_PD_DURING_FIND); 2771 p2p_set_timeout(p2p, 0, 200000); 2772} 2773 2774 2775int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq, 2776 struct os_reltime *rx_time, int level, const u8 *ies, 2777 size_t ies_len) 2778{ 2779 if (os_reltime_before(rx_time, &p2p->find_start)) { 2780 /* 2781 * The driver may have cached (e.g., in cfg80211 BSS table) the 2782 * scan results for relatively long time. To avoid reporting 2783 * stale information, update P2P peers only based on results 2784 * that have based on frames received after the last p2p_find 2785 * operation was started. 2786 */ 2787 p2p_dbg(p2p, "Ignore old scan result for " MACSTR 2788 " (rx_time=%u.%06u)", 2789 MAC2STR(bssid), (unsigned int) rx_time->sec, 2790 (unsigned int) rx_time->usec); 2791 return 0; 2792 } 2793 2794 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1); 2795 2796 return 0; 2797} 2798 2799 2800void p2p_scan_res_handled(struct p2p_data *p2p) 2801{ 2802 if (!p2p->p2p_scan_running) { 2803 p2p_dbg(p2p, "p2p_scan was not running, but scan results received"); 2804 } 2805 p2p->p2p_scan_running = 0; 2806 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2807 2808 if (p2p_run_after_scan(p2p)) 2809 return; 2810 if (p2p->state == P2P_SEARCH) 2811 p2p_continue_find(p2p); 2812} 2813 2814 2815void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id) 2816{ 2817 u8 *len; 2818 2819#ifdef CONFIG_WIFI_DISPLAY 2820 if (p2p->wfd_ie_probe_req) 2821 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req); 2822#endif /* CONFIG_WIFI_DISPLAY */ 2823 2824 len = p2p_buf_add_ie_hdr(ies); 2825 p2p_buf_add_capability(ies, p2p->dev_capab & 2826 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2827 if (dev_id) 2828 p2p_buf_add_device_id(ies, dev_id); 2829 if (p2p->cfg->reg_class && p2p->cfg->channel) 2830 p2p_buf_add_listen_channel(ies, p2p->cfg->country, 2831 p2p->cfg->reg_class, 2832 p2p->cfg->channel); 2833 if (p2p->ext_listen_interval) 2834 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period, 2835 p2p->ext_listen_interval); 2836 /* TODO: p2p_buf_add_operating_channel() if GO */ 2837 p2p_buf_update_ie_hdr(ies, len); 2838} 2839 2840 2841size_t p2p_scan_ie_buf_len(struct p2p_data *p2p) 2842{ 2843 size_t len = 100; 2844 2845#ifdef CONFIG_WIFI_DISPLAY 2846 if (p2p && p2p->wfd_ie_probe_req) 2847 len += wpabuf_len(p2p->wfd_ie_probe_req); 2848#endif /* CONFIG_WIFI_DISPLAY */ 2849 2850 return len; 2851} 2852 2853 2854int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end) 2855{ 2856 return p2p_attr_text(p2p_ie, buf, end); 2857} 2858 2859 2860static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success) 2861{ 2862 struct p2p_device *dev = p2p->go_neg_peer; 2863 int timeout; 2864 2865 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success); 2866 2867 if (dev == NULL) { 2868 p2p_dbg(p2p, "No pending GO Negotiation"); 2869 return; 2870 } 2871 2872 if (success) { 2873 if (dev->flags & P2P_DEV_USER_REJECTED) { 2874 p2p_set_state(p2p, P2P_IDLE); 2875 return; 2876 } 2877 } else if (dev->go_neg_req_sent) { 2878 /* Cancel the increment from p2p_connect_send() on failure */ 2879 dev->go_neg_req_sent--; 2880 } 2881 2882 if (!success && 2883 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) && 2884 !is_zero_ether_addr(dev->member_in_go_dev)) { 2885 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO", 2886 MAC2STR(dev->info.p2p_device_addr)); 2887 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 2888 p2p_send_dev_disc_req(p2p, dev); 2889 return; 2890 } 2891 2892 /* 2893 * Use P2P find, if needed, to find the other device from its listen 2894 * channel. 2895 */ 2896 p2p_set_state(p2p, P2P_CONNECT); 2897 timeout = success ? 500000 : 100000; 2898 if (!success && p2p->go_neg_peer && 2899 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) { 2900 unsigned int r; 2901 /* 2902 * Peer is expected to wait our response and we will skip the 2903 * listen phase. Add some randomness to the wait time here to 2904 * make it less likely to hit cases where we could end up in 2905 * sync with peer not listening. 2906 */ 2907 os_get_random((u8 *) &r, sizeof(r)); 2908 timeout += r % 100000; 2909 } 2910 p2p_set_timeout(p2p, 0, timeout); 2911} 2912 2913 2914static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success) 2915{ 2916 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d", 2917 success); 2918 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) { 2919 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore"); 2920 return; 2921 } 2922 p2p_set_state(p2p, P2P_CONNECT); 2923 p2p_set_timeout(p2p, 0, 500000); 2924} 2925 2926 2927static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success, 2928 const u8 *addr) 2929{ 2930 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success); 2931 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) { 2932 p2p_go_neg_failed(p2p, p2p->go_neg_peer, 2933 p2p->go_neg_peer->status); 2934 } else if (success) { 2935 struct p2p_device *dev; 2936 dev = p2p_get_device(p2p, addr); 2937 if (dev && 2938 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) 2939 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE; 2940 } 2941} 2942 2943 2944static void p2p_go_neg_conf_cb(struct p2p_data *p2p, 2945 enum p2p_send_action_result result) 2946{ 2947 struct p2p_device *dev; 2948 2949 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result); 2950 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 2951 if (result == P2P_SEND_ACTION_FAILED) { 2952 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 2953 return; 2954 } 2955 if (result == P2P_SEND_ACTION_NO_ACK) { 2956 /* 2957 * It looks like the TX status for GO Negotiation Confirm is 2958 * often showing failure even when the peer has actually 2959 * received the frame. Since the peer may change channels 2960 * immediately after having received the frame, we may not see 2961 * an Ack for retries, so just dropping a single frame may 2962 * trigger this. To allow the group formation to succeed if the 2963 * peer did indeed receive the frame, continue regardless of 2964 * the TX status. 2965 */ 2966 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported"); 2967 } 2968 2969 dev = p2p->go_neg_peer; 2970 if (dev == NULL) 2971 return; 2972 2973 p2p_go_complete(p2p, dev); 2974} 2975 2976 2977void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 2978 const u8 *src, const u8 *bssid, 2979 enum p2p_send_action_result result) 2980{ 2981 enum p2p_pending_action_state state; 2982 int success; 2983 2984 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR 2985 " src=" MACSTR " bssid=" MACSTR " result=%d", 2986 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), 2987 MAC2STR(bssid), result); 2988 success = result == P2P_SEND_ACTION_SUCCESS; 2989 state = p2p->pending_action_state; 2990 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2991 switch (state) { 2992 case P2P_NO_PENDING_ACTION: 2993 if (p2p->after_scan_tx_in_progress) { 2994 p2p->after_scan_tx_in_progress = 0; 2995 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING && 2996 p2p_run_after_scan(p2p)) 2997 break; 2998 if (p2p->state == P2P_SEARCH) { 2999 p2p_dbg(p2p, "Continue find after after_scan_tx completion"); 3000 p2p_continue_find(p2p); 3001 } 3002 } 3003 break; 3004 case P2P_PENDING_GO_NEG_REQUEST: 3005 p2p_go_neg_req_cb(p2p, success); 3006 break; 3007 case P2P_PENDING_GO_NEG_RESPONSE: 3008 p2p_go_neg_resp_cb(p2p, success); 3009 break; 3010 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE: 3011 p2p_go_neg_resp_failure_cb(p2p, success, dst); 3012 break; 3013 case P2P_PENDING_GO_NEG_CONFIRM: 3014 p2p_go_neg_conf_cb(p2p, result); 3015 break; 3016 case P2P_PENDING_SD: 3017 p2p_sd_cb(p2p, success); 3018 break; 3019 case P2P_PENDING_PD: 3020 p2p_prov_disc_cb(p2p, success); 3021 break; 3022 case P2P_PENDING_INVITATION_REQUEST: 3023 p2p_invitation_req_cb(p2p, success); 3024 break; 3025 case P2P_PENDING_INVITATION_RESPONSE: 3026 p2p_invitation_resp_cb(p2p, success); 3027 break; 3028 case P2P_PENDING_DEV_DISC_REQUEST: 3029 p2p_dev_disc_req_cb(p2p, success); 3030 break; 3031 case P2P_PENDING_DEV_DISC_RESPONSE: 3032 p2p_dev_disc_resp_cb(p2p, success); 3033 break; 3034 case P2P_PENDING_GO_DISC_REQ: 3035 p2p_go_disc_req_cb(p2p, success); 3036 break; 3037 } 3038 3039 p2p->after_scan_tx_in_progress = 0; 3040} 3041 3042 3043void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq, 3044 unsigned int duration) 3045{ 3046 if (freq == p2p->pending_client_disc_freq) { 3047 p2p_dbg(p2p, "Client discoverability remain-awake completed"); 3048 p2p->pending_client_disc_freq = 0; 3049 return; 3050 } 3051 3052 if (freq != p2p->pending_listen_freq) { 3053 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)", 3054 freq, duration, p2p->pending_listen_freq); 3055 return; 3056 } 3057 3058 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback", 3059 p2p->pending_listen_sec, p2p->pending_listen_usec, 3060 p2p->pending_listen_freq); 3061 p2p->in_listen = 1; 3062 p2p->drv_in_listen = freq; 3063 if (p2p->pending_listen_sec || p2p->pending_listen_usec) { 3064 /* 3065 * Add 20 msec extra wait to avoid race condition with driver 3066 * remain-on-channel end event, i.e., give driver more time to 3067 * complete the operation before our timeout expires. 3068 */ 3069 p2p_set_timeout(p2p, p2p->pending_listen_sec, 3070 p2p->pending_listen_usec + 20000); 3071 } 3072 3073 p2p->pending_listen_freq = 0; 3074} 3075 3076 3077int p2p_listen_end(struct p2p_data *p2p, unsigned int freq) 3078{ 3079 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq); 3080 p2p->drv_in_listen = 0; 3081 if (p2p->in_listen) 3082 return 0; /* Internal timeout will trigger the next step */ 3083 3084 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) { 3085 if (p2p->go_neg_peer->connect_reqs >= 120) { 3086 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3087 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3088 return 0; 3089 } 3090 3091 p2p_set_state(p2p, P2P_CONNECT); 3092 p2p_connect_send(p2p, p2p->go_neg_peer); 3093 return 1; 3094 } else if (p2p->state == P2P_SEARCH) { 3095 if (p2p->p2p_scan_running) { 3096 /* 3097 * Search is already in progress. This can happen if 3098 * an Action frame RX is reported immediately after 3099 * the end of a remain-on-channel operation and the 3100 * response frame to that is sent using an offchannel 3101 * operation while in p2p_find. Avoid an attempt to 3102 * restart a scan here. 3103 */ 3104 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one"); 3105 return 1; 3106 } 3107 if (p2p->pending_listen_freq) { 3108 /* 3109 * Better wait a bit if the driver is unable to start 3110 * offchannel operation for some reason. p2p_search() 3111 * will be started from internal timeout. 3112 */ 3113 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop"); 3114 p2p_set_timeout(p2p, 0, 100000); 3115 return 1; 3116 } 3117 if (p2p->search_delay) { 3118 p2p_dbg(p2p, "Delay search operation by %u ms", 3119 p2p->search_delay); 3120 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3121 (p2p->search_delay % 1000) * 1000); 3122 return 1; 3123 } 3124 p2p_search(p2p); 3125 return 1; 3126 } 3127 3128 return 0; 3129} 3130 3131 3132static void p2p_timeout_connect(struct p2p_data *p2p) 3133{ 3134 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3135 if (p2p->go_neg_peer && 3136 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 3137 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed"); 3138 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3139 return; 3140 } 3141 if (p2p->go_neg_peer && 3142 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) && 3143 p2p->go_neg_peer->connect_reqs < 120) { 3144 p2p_dbg(p2p, "Peer expected to wait our response - skip listen"); 3145 p2p_connect_send(p2p, p2p->go_neg_peer); 3146 return; 3147 } 3148 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) { 3149 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)"); 3150 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3151 p2p_set_timeout(p2p, 0, 30000); 3152 return; 3153 } 3154 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3155 p2p_listen_in_find(p2p, 0); 3156} 3157 3158 3159static void p2p_timeout_connect_listen(struct p2p_data *p2p) 3160{ 3161 if (p2p->go_neg_peer) { 3162 if (p2p->drv_in_listen) { 3163 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete"); 3164 return; 3165 } 3166 3167 if (p2p->go_neg_peer->connect_reqs >= 120) { 3168 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3169 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3170 return; 3171 } 3172 3173 p2p_set_state(p2p, P2P_CONNECT); 3174 p2p_connect_send(p2p, p2p->go_neg_peer); 3175 } else 3176 p2p_set_state(p2p, P2P_IDLE); 3177} 3178 3179 3180static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p) 3181{ 3182 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 3183 3184 if (p2p->cfg->is_concurrent_session_active && 3185 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx)) 3186 p2p_set_timeout(p2p, 0, 500000); 3187 else 3188 p2p_set_timeout(p2p, 0, 200000); 3189} 3190 3191 3192static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p) 3193{ 3194 struct p2p_device *dev = p2p->go_neg_peer; 3195 3196 if (dev == NULL) { 3197 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait"); 3198 return; 3199 } 3200 3201 dev->wait_count++; 3202 if (dev->wait_count >= 120) { 3203 p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation"); 3204 p2p_go_neg_failed(p2p, dev, -1); 3205 return; 3206 } 3207 3208 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation"); 3209 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT); 3210 p2p_listen_in_find(p2p, 0); 3211} 3212 3213 3214static void p2p_timeout_sd_during_find(struct p2p_data *p2p) 3215{ 3216 p2p_dbg(p2p, "Service Discovery Query timeout"); 3217 if (p2p->sd_peer) { 3218 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3219 p2p->sd_peer = NULL; 3220 } 3221 p2p_continue_find(p2p); 3222} 3223 3224 3225static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p) 3226{ 3227 p2p_dbg(p2p, "Provision Discovery Request timeout"); 3228 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3229 p2p_continue_find(p2p); 3230} 3231 3232 3233static void p2p_timeout_prov_disc_req(struct p2p_data *p2p) 3234{ 3235 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3236 3237 /* 3238 * For user initiated PD requests that we have not gotten any responses 3239 * for while in IDLE state, we retry them a couple of times before 3240 * giving up. 3241 */ 3242 if (!p2p->user_initiated_pd) 3243 return; 3244 3245 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout"); 3246 3247 if (p2p->pd_retries) { 3248 p2p->pd_retries--; 3249 p2p_retry_pd(p2p); 3250 } else { 3251 struct p2p_device *dev; 3252 int for_join = 0; 3253 3254 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3255 if (os_memcmp(p2p->pending_pd_devaddr, 3256 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3257 continue; 3258 if (dev->req_config_methods && 3259 (dev->flags & P2P_DEV_PD_FOR_JOIN)) 3260 for_join = 1; 3261 } 3262 3263 if (p2p->cfg->prov_disc_fail) 3264 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, 3265 p2p->pending_pd_devaddr, 3266 for_join ? 3267 P2P_PROV_DISC_TIMEOUT_JOIN : 3268 P2P_PROV_DISC_TIMEOUT); 3269 p2p_reset_pending_pd(p2p); 3270 } 3271} 3272 3273 3274static void p2p_timeout_invite(struct p2p_data *p2p) 3275{ 3276 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3277 p2p_set_state(p2p, P2P_INVITE_LISTEN); 3278 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 3279 /* 3280 * Better remain on operating channel instead of listen channel 3281 * when running a group. 3282 */ 3283 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel"); 3284 p2p_set_timeout(p2p, 0, 100000); 3285 return; 3286 } 3287 p2p_listen_in_find(p2p, 0); 3288} 3289 3290 3291static void p2p_timeout_invite_listen(struct p2p_data *p2p) 3292{ 3293 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) { 3294 p2p_set_state(p2p, P2P_INVITE); 3295 p2p_invite_send(p2p, p2p->invite_peer, 3296 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id); 3297 } else { 3298 if (p2p->invite_peer) { 3299 p2p_dbg(p2p, "Invitation Request retry limit reached"); 3300 if (p2p->cfg->invitation_result) 3301 p2p->cfg->invitation_result( 3302 p2p->cfg->cb_ctx, -1, NULL, NULL, 3303 p2p->invite_peer->info.p2p_device_addr, 3304 0); 3305 } 3306 p2p_set_state(p2p, P2P_IDLE); 3307 } 3308} 3309 3310 3311static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx) 3312{ 3313 struct p2p_data *p2p = eloop_ctx; 3314 3315 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state)); 3316 3317 p2p->in_listen = 0; 3318 3319 switch (p2p->state) { 3320 case P2P_IDLE: 3321 /* Check if we timed out waiting for PD req */ 3322 if (p2p->pending_action_state == P2P_PENDING_PD) 3323 p2p_timeout_prov_disc_req(p2p); 3324 break; 3325 case P2P_SEARCH: 3326 /* Check if we timed out waiting for PD req */ 3327 if (p2p->pending_action_state == P2P_PENDING_PD) 3328 p2p_timeout_prov_disc_req(p2p); 3329 if (p2p->search_delay && !p2p->in_search_delay) { 3330 p2p_dbg(p2p, "Delay search operation by %u ms", 3331 p2p->search_delay); 3332 p2p->in_search_delay = 1; 3333 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3334 (p2p->search_delay % 1000) * 1000); 3335 break; 3336 } 3337 p2p->in_search_delay = 0; 3338 p2p_search(p2p); 3339 break; 3340 case P2P_CONNECT: 3341 p2p_timeout_connect(p2p); 3342 break; 3343 case P2P_CONNECT_LISTEN: 3344 p2p_timeout_connect_listen(p2p); 3345 break; 3346 case P2P_GO_NEG: 3347 break; 3348 case P2P_LISTEN_ONLY: 3349 /* Check if we timed out waiting for PD req */ 3350 if (p2p->pending_action_state == P2P_PENDING_PD) 3351 p2p_timeout_prov_disc_req(p2p); 3352 3353 if (p2p->ext_listen_only) { 3354 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed"); 3355 p2p->ext_listen_only = 0; 3356 p2p_set_state(p2p, P2P_IDLE); 3357 } 3358 break; 3359 case P2P_WAIT_PEER_CONNECT: 3360 p2p_timeout_wait_peer_connect(p2p); 3361 break; 3362 case P2P_WAIT_PEER_IDLE: 3363 p2p_timeout_wait_peer_idle(p2p); 3364 break; 3365 case P2P_SD_DURING_FIND: 3366 p2p_timeout_sd_during_find(p2p); 3367 break; 3368 case P2P_PROVISIONING: 3369 break; 3370 case P2P_PD_DURING_FIND: 3371 p2p_timeout_prov_disc_during_find(p2p); 3372 break; 3373 case P2P_INVITE: 3374 p2p_timeout_invite(p2p); 3375 break; 3376 case P2P_INVITE_LISTEN: 3377 p2p_timeout_invite_listen(p2p); 3378 break; 3379 } 3380} 3381 3382 3383int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr) 3384{ 3385 struct p2p_device *dev; 3386 3387 dev = p2p_get_device(p2p, peer_addr); 3388 p2p_dbg(p2p, "Local request to reject connection attempts by peer " 3389 MACSTR, MAC2STR(peer_addr)); 3390 if (dev == NULL) { 3391 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr)); 3392 return -1; 3393 } 3394 dev->status = P2P_SC_FAIL_REJECTED_BY_USER; 3395 dev->flags |= P2P_DEV_USER_REJECTED; 3396 return 0; 3397} 3398 3399 3400const char * p2p_wps_method_text(enum p2p_wps_method method) 3401{ 3402 switch (method) { 3403 case WPS_NOT_READY: 3404 return "not-ready"; 3405 case WPS_PIN_DISPLAY: 3406 return "Display"; 3407 case WPS_PIN_KEYPAD: 3408 return "Keypad"; 3409 case WPS_PBC: 3410 return "PBC"; 3411 case WPS_NFC: 3412 return "NFC"; 3413 } 3414 3415 return "??"; 3416} 3417 3418 3419static const char * p2p_go_state_text(enum p2p_go_state go_state) 3420{ 3421 switch (go_state) { 3422 case UNKNOWN_GO: 3423 return "unknown"; 3424 case LOCAL_GO: 3425 return "local"; 3426 case REMOTE_GO: 3427 return "remote"; 3428 } 3429 3430 return "??"; 3431} 3432 3433 3434const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p, 3435 const u8 *addr, int next) 3436{ 3437 struct p2p_device *dev; 3438 3439 if (addr) 3440 dev = p2p_get_device(p2p, addr); 3441 else 3442 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 3443 3444 if (dev && next) { 3445 dev = dl_list_first(&dev->list, struct p2p_device, list); 3446 if (&dev->list == &p2p->devices) 3447 dev = NULL; 3448 } 3449 3450 if (dev == NULL) 3451 return NULL; 3452 3453 return &dev->info; 3454} 3455 3456 3457int p2p_get_peer_info_txt(const struct p2p_peer_info *info, 3458 char *buf, size_t buflen) 3459{ 3460 struct p2p_device *dev; 3461 int res; 3462 char *pos, *end; 3463 struct os_reltime now; 3464 3465 if (info == NULL) 3466 return -1; 3467 3468 dev = (struct p2p_device *) (((u8 *) info) - 3469 offsetof(struct p2p_device, info)); 3470 3471 pos = buf; 3472 end = buf + buflen; 3473 3474 os_get_reltime(&now); 3475 res = os_snprintf(pos, end - pos, 3476 "age=%d\n" 3477 "listen_freq=%d\n" 3478 "wps_method=%s\n" 3479 "interface_addr=" MACSTR "\n" 3480 "member_in_go_dev=" MACSTR "\n" 3481 "member_in_go_iface=" MACSTR "\n" 3482 "go_neg_req_sent=%d\n" 3483 "go_state=%s\n" 3484 "dialog_token=%u\n" 3485 "intended_addr=" MACSTR "\n" 3486 "country=%c%c\n" 3487 "oper_freq=%d\n" 3488 "req_config_methods=0x%x\n" 3489 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n" 3490 "status=%d\n" 3491 "wait_count=%u\n" 3492 "invitation_reqs=%u\n", 3493 (int) (now.sec - dev->last_seen.sec), 3494 dev->listen_freq, 3495 p2p_wps_method_text(dev->wps_method), 3496 MAC2STR(dev->interface_addr), 3497 MAC2STR(dev->member_in_go_dev), 3498 MAC2STR(dev->member_in_go_iface), 3499 dev->go_neg_req_sent, 3500 p2p_go_state_text(dev->go_state), 3501 dev->dialog_token, 3502 MAC2STR(dev->intended_addr), 3503 dev->country[0] ? dev->country[0] : '_', 3504 dev->country[1] ? dev->country[1] : '_', 3505 dev->oper_freq, 3506 dev->req_config_methods, 3507 dev->flags & P2P_DEV_PROBE_REQ_ONLY ? 3508 "[PROBE_REQ_ONLY]" : "", 3509 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "", 3510 dev->flags & P2P_DEV_NOT_YET_READY ? 3511 "[NOT_YET_READY]" : "", 3512 dev->flags & P2P_DEV_PD_PEER_DISPLAY ? 3513 "[PD_PEER_DISPLAY]" : "", 3514 dev->flags & P2P_DEV_PD_PEER_KEYPAD ? 3515 "[PD_PEER_KEYPAD]" : "", 3516 dev->flags & P2P_DEV_USER_REJECTED ? 3517 "[USER_REJECTED]" : "", 3518 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ? 3519 "[PEER_WAITING_RESPONSE]" : "", 3520 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ? 3521 "[PREFER_PERSISTENT_GROUP]" : "", 3522 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ? 3523 "[WAIT_GO_NEG_RESPONSE]" : "", 3524 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ? 3525 "[WAIT_GO_NEG_CONFIRM]" : "", 3526 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ? 3527 "[GROUP_CLIENT_ONLY]" : "", 3528 dev->flags & P2P_DEV_FORCE_FREQ ? 3529 "[FORCE_FREQ]" : "", 3530 dev->flags & P2P_DEV_PD_FOR_JOIN ? 3531 "[PD_FOR_JOIN]" : "", 3532 dev->status, 3533 dev->wait_count, 3534 dev->invitation_reqs); 3535 if (res < 0 || res >= end - pos) 3536 return pos - buf; 3537 pos += res; 3538 3539 if (dev->ext_listen_period) { 3540 res = os_snprintf(pos, end - pos, 3541 "ext_listen_period=%u\n" 3542 "ext_listen_interval=%u\n", 3543 dev->ext_listen_period, 3544 dev->ext_listen_interval); 3545 if (res < 0 || res >= end - pos) 3546 return pos - buf; 3547 pos += res; 3548 } 3549 3550 if (dev->oper_ssid_len) { 3551 res = os_snprintf(pos, end - pos, 3552 "oper_ssid=%s\n", 3553 wpa_ssid_txt(dev->oper_ssid, 3554 dev->oper_ssid_len)); 3555 if (res < 0 || res >= end - pos) 3556 return pos - buf; 3557 pos += res; 3558 } 3559 3560#ifdef CONFIG_WIFI_DISPLAY 3561 if (dev->info.wfd_subelems) { 3562 res = os_snprintf(pos, end - pos, "wfd_subelems="); 3563 if (res < 0 || res >= end - pos) 3564 return pos - buf; 3565 pos += res; 3566 3567 pos += wpa_snprintf_hex(pos, end - pos, 3568 wpabuf_head(dev->info.wfd_subelems), 3569 wpabuf_len(dev->info.wfd_subelems)); 3570 3571 res = os_snprintf(pos, end - pos, "\n"); 3572 if (res < 0 || res >= end - pos) 3573 return pos - buf; 3574 pos += res; 3575 } 3576#endif /* CONFIG_WIFI_DISPLAY */ 3577 3578 return pos - buf; 3579} 3580 3581 3582int p2p_peer_known(struct p2p_data *p2p, const u8 *addr) 3583{ 3584 return p2p_get_device(p2p, addr) != NULL; 3585} 3586 3587 3588void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled) 3589{ 3590 if (enabled) { 3591 p2p_dbg(p2p, "Client discoverability enabled"); 3592 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3593 } else { 3594 p2p_dbg(p2p, "Client discoverability disabled"); 3595 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3596 } 3597} 3598 3599 3600static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1, 3601 u32 duration2, u32 interval2) 3602{ 3603 struct wpabuf *req; 3604 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL; 3605 u8 *len; 3606 3607 req = wpabuf_alloc(100); 3608 if (req == NULL) 3609 return NULL; 3610 3611 if (duration1 || interval1) { 3612 os_memset(&desc1, 0, sizeof(desc1)); 3613 desc1.count_type = 1; 3614 desc1.duration = duration1; 3615 desc1.interval = interval1; 3616 ptr1 = &desc1; 3617 3618 if (duration2 || interval2) { 3619 os_memset(&desc2, 0, sizeof(desc2)); 3620 desc2.count_type = 2; 3621 desc2.duration = duration2; 3622 desc2.interval = interval2; 3623 ptr2 = &desc2; 3624 } 3625 } 3626 3627 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1); 3628 len = p2p_buf_add_ie_hdr(req); 3629 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2); 3630 p2p_buf_update_ie_hdr(req, len); 3631 3632 return req; 3633} 3634 3635 3636int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr, 3637 const u8 *own_interface_addr, unsigned int freq, 3638 u32 duration1, u32 interval1, u32 duration2, 3639 u32 interval2) 3640{ 3641 struct wpabuf *req; 3642 3643 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR 3644 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u " 3645 "dur2=%u int2=%u", 3646 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr), 3647 freq, duration1, interval1, duration2, interval2); 3648 3649 req = p2p_build_presence_req(duration1, interval1, duration2, 3650 interval2); 3651 if (req == NULL) 3652 return -1; 3653 3654 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3655 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr, 3656 go_interface_addr, 3657 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 3658 p2p_dbg(p2p, "Failed to send Action frame"); 3659 } 3660 wpabuf_free(req); 3661 3662 return 0; 3663} 3664 3665 3666static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa, 3667 size_t noa_len, u8 dialog_token) 3668{ 3669 struct wpabuf *resp; 3670 u8 *len; 3671 3672 resp = wpabuf_alloc(100 + noa_len); 3673 if (resp == NULL) 3674 return NULL; 3675 3676 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token); 3677 len = p2p_buf_add_ie_hdr(resp); 3678 p2p_buf_add_status(resp, status); 3679 if (noa) { 3680 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE); 3681 wpabuf_put_le16(resp, noa_len); 3682 wpabuf_put_data(resp, noa, noa_len); 3683 } else 3684 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL); 3685 p2p_buf_update_ie_hdr(resp, len); 3686 3687 return resp; 3688} 3689 3690 3691static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 3692 const u8 *sa, const u8 *data, size_t len, 3693 int rx_freq) 3694{ 3695 struct p2p_message msg; 3696 u8 status; 3697 struct wpabuf *resp; 3698 size_t g; 3699 struct p2p_group *group = NULL; 3700 int parsed = 0; 3701 u8 noa[50]; 3702 int noa_len; 3703 3704 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request"); 3705 3706 for (g = 0; g < p2p->num_groups; g++) { 3707 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]), 3708 ETH_ALEN) == 0) { 3709 group = p2p->groups[g]; 3710 break; 3711 } 3712 } 3713 if (group == NULL) { 3714 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group " 3715 MACSTR, MAC2STR(da)); 3716 return; 3717 } 3718 3719 if (p2p_parse(data, len, &msg) < 0) { 3720 p2p_dbg(p2p, "Failed to parse P2P Presence Request"); 3721 status = P2P_SC_FAIL_INVALID_PARAMS; 3722 goto fail; 3723 } 3724 parsed = 1; 3725 3726 if (msg.noa == NULL) { 3727 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request"); 3728 status = P2P_SC_FAIL_INVALID_PARAMS; 3729 goto fail; 3730 } 3731 3732 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len); 3733 3734fail: 3735 if (p2p->cfg->get_noa) 3736 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa, 3737 sizeof(noa)); 3738 else 3739 noa_len = -1; 3740 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL, 3741 noa_len > 0 ? noa_len : 0, 3742 msg.dialog_token); 3743 if (parsed) 3744 p2p_parse_free(&msg); 3745 if (resp == NULL) 3746 return; 3747 3748 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3749 if (p2p_send_action(p2p, rx_freq, sa, da, da, 3750 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 3751 p2p_dbg(p2p, "Failed to send Action frame"); 3752 } 3753 wpabuf_free(resp); 3754} 3755 3756 3757static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 3758 const u8 *sa, const u8 *data, size_t len) 3759{ 3760 struct p2p_message msg; 3761 3762 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response"); 3763 3764 if (p2p_parse(data, len, &msg) < 0) { 3765 p2p_dbg(p2p, "Failed to parse P2P Presence Response"); 3766 return; 3767 } 3768 3769 if (msg.status == NULL || msg.noa == NULL) { 3770 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response"); 3771 p2p_parse_free(&msg); 3772 return; 3773 } 3774 3775 if (p2p->cfg->presence_resp) { 3776 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status, 3777 msg.noa, msg.noa_len); 3778 } 3779 3780 if (*msg.status) { 3781 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u", 3782 *msg.status); 3783 p2p_parse_free(&msg); 3784 return; 3785 } 3786 3787 p2p_dbg(p2p, "P2P Presence Request was accepted"); 3788 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA", 3789 msg.noa, msg.noa_len); 3790 /* TODO: process NoA */ 3791 p2p_parse_free(&msg); 3792} 3793 3794 3795static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx) 3796{ 3797 struct p2p_data *p2p = eloop_ctx; 3798 3799 if (p2p->ext_listen_interval) { 3800 /* Schedule next extended listen timeout */ 3801 eloop_register_timeout(p2p->ext_listen_interval_sec, 3802 p2p->ext_listen_interval_usec, 3803 p2p_ext_listen_timeout, p2p, NULL); 3804 } 3805 3806 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) { 3807 /* 3808 * This should not really happen, but it looks like the Listen 3809 * command may fail is something else (e.g., a scan) was 3810 * running at an inconvenient time. As a workaround, allow new 3811 * Extended Listen operation to be started. 3812 */ 3813 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again"); 3814 p2p->ext_listen_only = 0; 3815 p2p_set_state(p2p, P2P_IDLE); 3816 } 3817 3818 if (p2p->state != P2P_IDLE) { 3819 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state)); 3820 return; 3821 } 3822 3823 p2p_dbg(p2p, "Extended Listen timeout"); 3824 p2p->ext_listen_only = 1; 3825 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) { 3826 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing"); 3827 p2p->ext_listen_only = 0; 3828 } 3829} 3830 3831 3832int p2p_ext_listen(struct p2p_data *p2p, unsigned int period, 3833 unsigned int interval) 3834{ 3835 if (period > 65535 || interval > 65535 || period > interval || 3836 (period == 0 && interval > 0) || (period > 0 && interval == 0)) { 3837 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u", 3838 period, interval); 3839 return -1; 3840 } 3841 3842 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 3843 3844 if (interval == 0) { 3845 p2p_dbg(p2p, "Disabling Extended Listen Timing"); 3846 p2p->ext_listen_period = 0; 3847 p2p->ext_listen_interval = 0; 3848 return 0; 3849 } 3850 3851 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec", 3852 period, interval); 3853 p2p->ext_listen_period = period; 3854 p2p->ext_listen_interval = interval; 3855 p2p->ext_listen_interval_sec = interval / 1000; 3856 p2p->ext_listen_interval_usec = (interval % 1000) * 1000; 3857 3858 eloop_register_timeout(p2p->ext_listen_interval_sec, 3859 p2p->ext_listen_interval_usec, 3860 p2p_ext_listen_timeout, p2p, NULL); 3861 3862 return 0; 3863} 3864 3865 3866void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 3867 const u8 *ie, size_t ie_len) 3868{ 3869 struct p2p_message msg; 3870 3871 if (bssid == NULL || ie == NULL) 3872 return; 3873 3874 os_memset(&msg, 0, sizeof(msg)); 3875 if (p2p_parse_ies(ie, ie_len, &msg)) 3876 return; 3877 if (msg.minor_reason_code == NULL) { 3878 p2p_parse_free(&msg); 3879 return; 3880 } 3881 3882 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR 3883 " reason_code=%u minor_reason_code=%u", 3884 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 3885 3886 p2p_parse_free(&msg); 3887} 3888 3889 3890void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 3891 const u8 *ie, size_t ie_len) 3892{ 3893 struct p2p_message msg; 3894 3895 if (bssid == NULL || ie == NULL) 3896 return; 3897 3898 os_memset(&msg, 0, sizeof(msg)); 3899 if (p2p_parse_ies(ie, ie_len, &msg)) 3900 return; 3901 if (msg.minor_reason_code == NULL) { 3902 p2p_parse_free(&msg); 3903 return; 3904 } 3905 3906 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR 3907 " reason_code=%u minor_reason_code=%u", 3908 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 3909 3910 p2p_parse_free(&msg); 3911} 3912 3913 3914void p2p_set_managed_oper(struct p2p_data *p2p, int enabled) 3915{ 3916 if (enabled) { 3917 p2p_dbg(p2p, "Managed P2P Device operations enabled"); 3918 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED; 3919 } else { 3920 p2p_dbg(p2p, "Managed P2P Device operations disabled"); 3921 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED; 3922 } 3923} 3924 3925 3926int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel) 3927{ 3928 if (p2p_channel_to_freq(reg_class, channel) < 0) 3929 return -1; 3930 3931 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u", 3932 reg_class, channel); 3933 p2p->cfg->reg_class = reg_class; 3934 p2p->cfg->channel = channel; 3935 3936 return 0; 3937} 3938 3939 3940int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len) 3941{ 3942 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len)); 3943 if (postfix == NULL) { 3944 p2p->cfg->ssid_postfix_len = 0; 3945 return 0; 3946 } 3947 if (len > sizeof(p2p->cfg->ssid_postfix)) 3948 return -1; 3949 os_memcpy(p2p->cfg->ssid_postfix, postfix, len); 3950 p2p->cfg->ssid_postfix_len = len; 3951 return 0; 3952} 3953 3954 3955int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel, 3956 int cfg_op_channel) 3957{ 3958 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0) 3959 return -1; 3960 3961 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u", 3962 op_reg_class, op_channel); 3963 p2p->cfg->op_reg_class = op_reg_class; 3964 p2p->cfg->op_channel = op_channel; 3965 p2p->cfg->cfg_op_channel = cfg_op_channel; 3966 return 0; 3967} 3968 3969 3970int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan, 3971 const struct p2p_channel *pref_chan) 3972{ 3973 struct p2p_channel *n; 3974 3975 if (pref_chan) { 3976 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel)); 3977 if (n == NULL) 3978 return -1; 3979 os_memcpy(n, pref_chan, 3980 num_pref_chan * sizeof(struct p2p_channel)); 3981 } else 3982 n = NULL; 3983 3984 os_free(p2p->cfg->pref_chan); 3985 p2p->cfg->pref_chan = n; 3986 p2p->cfg->num_pref_chan = num_pref_chan; 3987 3988 return 0; 3989} 3990 3991 3992int p2p_set_no_go_freq(struct p2p_data *p2p, 3993 const struct wpa_freq_range_list *list) 3994{ 3995 struct wpa_freq_range *tmp; 3996 3997 if (list == NULL || list->num == 0) { 3998 os_free(p2p->no_go_freq.range); 3999 p2p->no_go_freq.range = NULL; 4000 p2p->no_go_freq.num = 0; 4001 return 0; 4002 } 4003 4004 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range)); 4005 if (tmp == NULL) 4006 return -1; 4007 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range)); 4008 os_free(p2p->no_go_freq.range); 4009 p2p->no_go_freq.range = tmp; 4010 p2p->no_go_freq.num = list->num; 4011 p2p_dbg(p2p, "Updated no GO chan list"); 4012 4013 return 0; 4014} 4015 4016 4017int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr, 4018 u8 *iface_addr) 4019{ 4020 struct p2p_device *dev = p2p_get_device(p2p, dev_addr); 4021 if (dev == NULL || is_zero_ether_addr(dev->interface_addr)) 4022 return -1; 4023 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN); 4024 return 0; 4025} 4026 4027 4028int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr, 4029 u8 *dev_addr) 4030{ 4031 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4032 if (dev == NULL) 4033 return -1; 4034 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN); 4035 return 0; 4036} 4037 4038 4039void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr) 4040{ 4041 os_memcpy(p2p->peer_filter, addr, ETH_ALEN); 4042 if (is_zero_ether_addr(p2p->peer_filter)) 4043 p2p_dbg(p2p, "Disable peer filter"); 4044 else 4045 p2p_dbg(p2p, "Enable peer filter for " MACSTR, 4046 MAC2STR(p2p->peer_filter)); 4047} 4048 4049 4050void p2p_set_cross_connect(struct p2p_data *p2p, int enabled) 4051{ 4052 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled"); 4053 if (p2p->cross_connect == enabled) 4054 return; 4055 p2p->cross_connect = enabled; 4056 /* TODO: may need to tear down any action group where we are GO(?) */ 4057} 4058 4059 4060int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr) 4061{ 4062 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4063 if (dev == NULL) 4064 return -1; 4065 if (dev->oper_freq <= 0) 4066 return -1; 4067 return dev->oper_freq; 4068} 4069 4070 4071void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled) 4072{ 4073 p2p_dbg(p2p, "Intra BSS distribution %s", 4074 enabled ? "enabled" : "disabled"); 4075 p2p->cfg->p2p_intra_bss = enabled; 4076} 4077 4078 4079void p2p_update_channel_list(struct p2p_data *p2p, 4080 const struct p2p_channels *chan, 4081 const struct p2p_channels *cli_chan) 4082{ 4083 p2p_dbg(p2p, "Update channel list"); 4084 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels)); 4085 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 4086 os_memcpy(&p2p->cfg->cli_channels, cli_chan, 4087 sizeof(struct p2p_channels)); 4088 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 4089} 4090 4091 4092int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 4093 const u8 *src, const u8 *bssid, const u8 *buf, 4094 size_t len, unsigned int wait_time) 4095{ 4096 if (p2p->p2p_scan_running) { 4097 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes"); 4098 if (p2p->after_scan_tx) { 4099 p2p_dbg(p2p, "Dropped previous pending Action frame TX"); 4100 os_free(p2p->after_scan_tx); 4101 } 4102 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) + 4103 len); 4104 if (p2p->after_scan_tx == NULL) 4105 return -1; 4106 p2p->after_scan_tx->freq = freq; 4107 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN); 4108 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN); 4109 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN); 4110 p2p->after_scan_tx->len = len; 4111 p2p->after_scan_tx->wait_time = wait_time; 4112 os_memcpy(p2p->after_scan_tx + 1, buf, len); 4113 return 0; 4114 } 4115 4116 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid, 4117 buf, len, wait_time); 4118} 4119 4120 4121void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5, 4122 int freq_overall) 4123{ 4124 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d", 4125 freq_24, freq_5, freq_overall); 4126 p2p->best_freq_24 = freq_24; 4127 p2p->best_freq_5 = freq_5; 4128 p2p->best_freq_overall = freq_overall; 4129} 4130 4131 4132void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq) 4133{ 4134 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq); 4135 p2p->own_freq_preference = freq; 4136} 4137 4138 4139const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p) 4140{ 4141 if (p2p == NULL || p2p->go_neg_peer == NULL) 4142 return NULL; 4143 return p2p->go_neg_peer->info.p2p_device_addr; 4144} 4145 4146 4147const struct p2p_peer_info * 4148p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next) 4149{ 4150 struct p2p_device *dev; 4151 4152 if (addr) { 4153 dev = p2p_get_device(p2p, addr); 4154 if (!dev) 4155 return NULL; 4156 4157 if (!next) { 4158 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 4159 return NULL; 4160 4161 return &dev->info; 4162 } else { 4163 do { 4164 dev = dl_list_first(&dev->list, 4165 struct p2p_device, 4166 list); 4167 if (&dev->list == &p2p->devices) 4168 return NULL; 4169 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY); 4170 } 4171 } else { 4172 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4173 if (!dev) 4174 return NULL; 4175 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 4176 dev = dl_list_first(&dev->list, 4177 struct p2p_device, 4178 list); 4179 if (&dev->list == &p2p->devices) 4180 return NULL; 4181 } 4182 } 4183 4184 return &dev->info; 4185} 4186 4187 4188int p2p_in_progress(struct p2p_data *p2p) 4189{ 4190 if (p2p == NULL) 4191 return 0; 4192 if (p2p->state == P2P_SEARCH) 4193 return 2; 4194 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING; 4195} 4196 4197 4198void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout, 4199 u8 client_timeout) 4200{ 4201 if (p2p) { 4202 p2p->go_timeout = go_timeout; 4203 p2p->client_timeout = client_timeout; 4204 } 4205} 4206 4207 4208#ifdef CONFIG_WIFI_DISPLAY 4209 4210static void p2p_update_wfd_ie_groups(struct p2p_data *p2p) 4211{ 4212 size_t g; 4213 struct p2p_group *group; 4214 4215 for (g = 0; g < p2p->num_groups; g++) { 4216 group = p2p->groups[g]; 4217 p2p_group_force_beacon_update_ies(group); 4218 } 4219} 4220 4221 4222int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie) 4223{ 4224 wpabuf_free(p2p->wfd_ie_beacon); 4225 p2p->wfd_ie_beacon = ie; 4226 p2p_update_wfd_ie_groups(p2p); 4227 return 0; 4228} 4229 4230 4231int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie) 4232{ 4233 wpabuf_free(p2p->wfd_ie_probe_req); 4234 p2p->wfd_ie_probe_req = ie; 4235 return 0; 4236} 4237 4238 4239int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie) 4240{ 4241 wpabuf_free(p2p->wfd_ie_probe_resp); 4242 p2p->wfd_ie_probe_resp = ie; 4243 p2p_update_wfd_ie_groups(p2p); 4244 return 0; 4245} 4246 4247 4248int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie) 4249{ 4250 wpabuf_free(p2p->wfd_ie_assoc_req); 4251 p2p->wfd_ie_assoc_req = ie; 4252 return 0; 4253} 4254 4255 4256int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie) 4257{ 4258 wpabuf_free(p2p->wfd_ie_invitation); 4259 p2p->wfd_ie_invitation = ie; 4260 return 0; 4261} 4262 4263 4264int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie) 4265{ 4266 wpabuf_free(p2p->wfd_ie_prov_disc_req); 4267 p2p->wfd_ie_prov_disc_req = ie; 4268 return 0; 4269} 4270 4271 4272int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie) 4273{ 4274 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 4275 p2p->wfd_ie_prov_disc_resp = ie; 4276 return 0; 4277} 4278 4279 4280int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie) 4281{ 4282 wpabuf_free(p2p->wfd_ie_go_neg); 4283 p2p->wfd_ie_go_neg = ie; 4284 return 0; 4285} 4286 4287 4288int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem) 4289{ 4290 wpabuf_free(p2p->wfd_dev_info); 4291 if (elem) { 4292 p2p->wfd_dev_info = wpabuf_dup(elem); 4293 if (p2p->wfd_dev_info == NULL) 4294 return -1; 4295 } else 4296 p2p->wfd_dev_info = NULL; 4297 4298 return 0; 4299} 4300 4301 4302int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem) 4303{ 4304 wpabuf_free(p2p->wfd_assoc_bssid); 4305 if (elem) { 4306 p2p->wfd_assoc_bssid = wpabuf_dup(elem); 4307 if (p2p->wfd_assoc_bssid == NULL) 4308 return -1; 4309 } else 4310 p2p->wfd_assoc_bssid = NULL; 4311 4312 return 0; 4313} 4314 4315 4316int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p, 4317 const struct wpabuf *elem) 4318{ 4319 wpabuf_free(p2p->wfd_coupled_sink_info); 4320 if (elem) { 4321 p2p->wfd_coupled_sink_info = wpabuf_dup(elem); 4322 if (p2p->wfd_coupled_sink_info == NULL) 4323 return -1; 4324 } else 4325 p2p->wfd_coupled_sink_info = NULL; 4326 4327 return 0; 4328} 4329 4330#endif /* CONFIG_WIFI_DISPLAY */ 4331 4332 4333int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int, 4334 int max_disc_tu) 4335{ 4336 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0) 4337 return -1; 4338 4339 p2p->min_disc_int = min_disc_int; 4340 p2p->max_disc_int = max_disc_int; 4341 p2p->max_disc_tu = max_disc_tu; 4342 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d", 4343 min_disc_int, max_disc_int, max_disc_tu); 4344 4345 return 0; 4346} 4347 4348 4349void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...) 4350{ 4351 va_list ap; 4352 char buf[500]; 4353 4354 if (!p2p->cfg->debug_print) 4355 return; 4356 4357 va_start(ap, fmt); 4358 vsnprintf(buf, sizeof(buf), fmt, ap); 4359 buf[sizeof(buf) - 1] = '\0'; 4360 va_end(ap); 4361 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf); 4362} 4363 4364 4365void p2p_info(struct p2p_data *p2p, const char *fmt, ...) 4366{ 4367 va_list ap; 4368 char buf[500]; 4369 4370 if (!p2p->cfg->debug_print) 4371 return; 4372 4373 va_start(ap, fmt); 4374 vsnprintf(buf, sizeof(buf), fmt, ap); 4375 buf[sizeof(buf) - 1] = '\0'; 4376 va_end(ap); 4377 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf); 4378} 4379 4380 4381void p2p_err(struct p2p_data *p2p, const char *fmt, ...) 4382{ 4383 va_list ap; 4384 char buf[500]; 4385 4386 if (!p2p->cfg->debug_print) 4387 return; 4388 4389 va_start(ap, fmt); 4390 vsnprintf(buf, sizeof(buf), fmt, ap); 4391 buf[sizeof(buf) - 1] = '\0'; 4392 va_end(ap); 4393 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf); 4394} 4395 4396 4397#ifdef CONFIG_WPS_NFC 4398 4399static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p, 4400 int client_freq, 4401 const u8 *go_dev_addr, 4402 const u8 *ssid, size_t ssid_len) 4403{ 4404 struct wpabuf *buf; 4405 u8 op_class, channel; 4406 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP; 4407 4408 buf = wpabuf_alloc(1000); 4409 if (buf == NULL) 4410 return NULL; 4411 4412 op_class = p2p->cfg->reg_class; 4413 channel = p2p->cfg->channel; 4414 4415 p2p_buf_add_capability(buf, p2p->dev_capab & 4416 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 4417 p2p_buf_add_device_info(buf, p2p, NULL); 4418 4419 if (p2p->num_groups > 0) { 4420 role = P2P_GO_IN_A_GROUP; 4421 p2p_freq_to_channel(p2p_group_get_freq(p2p->groups[0]), 4422 &op_class, &channel); 4423 } else if (client_freq > 0) { 4424 role = P2P_CLIENT_IN_A_GROUP; 4425 p2p_freq_to_channel(client_freq, &op_class, &channel); 4426 } 4427 4428 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class, 4429 channel, role); 4430 4431 if (p2p->num_groups > 0) { 4432 /* Limit number of clients to avoid very long message */ 4433 p2p_buf_add_group_info(p2p->groups[0], buf, 5); 4434 p2p_group_buf_add_id(p2p->groups[0], buf); 4435 } else if (client_freq > 0 && 4436 go_dev_addr && !is_zero_ether_addr(go_dev_addr) && 4437 ssid && ssid_len > 0) { 4438 /* 4439 * Add the optional P2P Group ID to indicate in which group this 4440 * device is a P2P Client. 4441 */ 4442 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len); 4443 } 4444 4445 return buf; 4446} 4447 4448 4449struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p, 4450 int client_freq, 4451 const u8 *go_dev_addr, 4452 const u8 *ssid, size_t ssid_len) 4453{ 4454 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 4455 ssid_len); 4456} 4457 4458 4459struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p, 4460 int client_freq, 4461 const u8 *go_dev_addr, 4462 const u8 *ssid, size_t ssid_len) 4463{ 4464 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 4465 ssid_len); 4466} 4467 4468 4469int p2p_process_nfc_connection_handover(struct p2p_data *p2p, 4470 struct p2p_nfc_params *params) 4471{ 4472 struct p2p_message msg; 4473 struct p2p_device *dev; 4474 const u8 *p2p_dev_addr; 4475 int freq; 4476 enum p2p_role_indication role; 4477 4478 params->next_step = NO_ACTION; 4479 4480 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len, 4481 params->p2p_attr, params->p2p_len, &msg)) { 4482 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC"); 4483 p2p_parse_free(&msg); 4484 return -1; 4485 } 4486 4487 if (msg.p2p_device_addr) 4488 p2p_dev_addr = msg.p2p_device_addr; 4489 else if (msg.device_id) 4490 p2p_dev_addr = msg.device_id; 4491 else { 4492 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 4493 p2p_parse_free(&msg); 4494 return -1; 4495 } 4496 4497 if (msg.oob_dev_password) { 4498 os_memcpy(params->oob_dev_pw, msg.oob_dev_password, 4499 msg.oob_dev_password_len); 4500 params->oob_dev_pw_len = msg.oob_dev_password_len; 4501 } 4502 4503 dev = p2p_create_device(p2p, p2p_dev_addr); 4504 if (dev == NULL) { 4505 p2p_parse_free(&msg); 4506 return -1; 4507 } 4508 4509 params->peer = &dev->info; 4510 4511 os_get_reltime(&dev->last_seen); 4512 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 4513 p2p_copy_wps_info(p2p, dev, 0, &msg); 4514 4515 if (!msg.oob_go_neg_channel) { 4516 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included"); 4517 return -1; 4518 } 4519 4520 if (msg.oob_go_neg_channel[3] == 0 && 4521 msg.oob_go_neg_channel[4] == 0) 4522 freq = 0; 4523 else 4524 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3], 4525 msg.oob_go_neg_channel[4]); 4526 if (freq < 0) { 4527 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel"); 4528 return -1; 4529 } 4530 role = msg.oob_go_neg_channel[5]; 4531 4532 if (role == P2P_GO_IN_A_GROUP) { 4533 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq); 4534 params->go_freq = freq; 4535 } else if (role == P2P_CLIENT_IN_A_GROUP) { 4536 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz", 4537 freq); 4538 params->go_freq = freq; 4539 } else 4540 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq); 4541 dev->oob_go_neg_freq = freq; 4542 4543 if (!params->sel && role != P2P_GO_IN_A_GROUP) { 4544 freq = p2p_channel_to_freq(p2p->cfg->reg_class, 4545 p2p->cfg->channel); 4546 if (freq < 0) { 4547 p2p_dbg(p2p, "Own listen channel not known"); 4548 return -1; 4549 } 4550 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq); 4551 dev->oob_go_neg_freq = freq; 4552 } 4553 4554 if (msg.group_id) { 4555 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN); 4556 params->go_ssid_len = msg.group_id_len - ETH_ALEN; 4557 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN, 4558 params->go_ssid_len); 4559 } 4560 4561 p2p_parse_free(&msg); 4562 4563 if (dev->flags & P2P_DEV_USER_REJECTED) { 4564 p2p_dbg(p2p, "Do not report rejected device"); 4565 return 0; 4566 } 4567 4568 if (!(dev->flags & P2P_DEV_REPORTED)) { 4569 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info, 4570 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 4571 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 4572 } 4573 4574 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0) 4575 params->next_step = BOTH_GO; 4576 else if (role == P2P_GO_IN_A_GROUP) 4577 params->next_step = JOIN_GROUP; 4578 else if (role == P2P_CLIENT_IN_A_GROUP) { 4579 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 4580 params->next_step = PEER_CLIENT; 4581 } else if (p2p->num_groups > 0) 4582 params->next_step = AUTH_JOIN; 4583 else if (params->sel) 4584 params->next_step = INIT_GO_NEG; 4585 else 4586 params->next_step = RESP_GO_NEG; 4587 4588 return 0; 4589} 4590 4591 4592void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id, 4593 int go_intent, 4594 const u8 *own_interface_addr) 4595{ 4596 4597 p2p->authorized_oob_dev_pw_id = dev_pw_id; 4598 if (dev_pw_id == 0) { 4599 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover"); 4600 return; 4601 } 4602 4603 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover", 4604 dev_pw_id); 4605 4606 p2p->go_intent = go_intent; 4607 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 4608} 4609 4610#endif /* CONFIG_WPS_NFC */ 4611