p2p.c revision 96be6222df414a7dde5c5b1b72df22e67b1a77fc
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 (p2p_pending_sd_req(p2p, dev)) 737 dev->flags |= P2P_DEV_SD_SCHEDULE; 738 739 if (dev->flags & P2P_DEV_REPORTED) 740 return 0; 741 742 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)", 743 freq, (unsigned int) rx_time->sec, 744 (unsigned int) rx_time->usec); 745 if (dev->flags & P2P_DEV_USER_REJECTED) { 746 p2p_dbg(p2p, "Do not report rejected device"); 747 return 0; 748 } 749 750 if (dev->info.config_methods == 0 && 751 (freq == 2412 || freq == 2437 || freq == 2462)) { 752 /* 753 * If we have only seen a Beacon frame from a GO, we do not yet 754 * know what WPS config methods it supports. Since some 755 * applications use config_methods value from P2P-DEVICE-FOUND 756 * events, postpone reporting this peer until we've fully 757 * discovered its capabilities. 758 * 759 * At least for now, do this only if the peer was detected on 760 * one of the social channels since that peer can be easily be 761 * found again and there are no limitations of having to use 762 * passive scan on this channels, so this can be done through 763 * Probe Response frame that includes the config_methods 764 * information. 765 */ 766 p2p_dbg(p2p, "Do not report peer " MACSTR 767 " with unknown config methods", MAC2STR(addr)); 768 return 0; 769 } 770 771 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 772 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 773 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 774 775 return 0; 776} 777 778 779static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev) 780{ 781 int i; 782 783 if (p2p->go_neg_peer == dev) { 784 /* 785 * If GO Negotiation is in progress, report that it has failed. 786 */ 787 p2p_go_neg_failed(p2p, dev, -1); 788 p2p->go_neg_peer = NULL; 789 } 790 if (p2p->invite_peer == dev) 791 p2p->invite_peer = NULL; 792 if (p2p->sd_peer == dev) 793 p2p->sd_peer = NULL; 794 if (p2p->pending_client_disc_go == dev) 795 p2p->pending_client_disc_go = NULL; 796 797 /* dev_lost() device, but only if it was previously dev_found() */ 798 if (dev->flags & P2P_DEV_REPORTED_ONCE) 799 p2p->cfg->dev_lost(p2p->cfg->cb_ctx, 800 dev->info.p2p_device_addr); 801 802 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 803 wpabuf_free(dev->info.wps_vendor_ext[i]); 804 dev->info.wps_vendor_ext[i] = NULL; 805 } 806 807 wpabuf_free(dev->info.wfd_subelems); 808 809 os_free(dev); 810} 811 812 813static int p2p_get_next_prog_freq(struct p2p_data *p2p) 814{ 815 struct p2p_channels *c; 816 struct p2p_reg_class *cla; 817 size_t cl, ch; 818 int found = 0; 819 u8 reg_class; 820 u8 channel; 821 int freq; 822 823 c = &p2p->cfg->channels; 824 for (cl = 0; cl < c->reg_classes; cl++) { 825 cla = &c->reg_class[cl]; 826 if (cla->reg_class != p2p->last_prog_scan_class) 827 continue; 828 for (ch = 0; ch < cla->channels; ch++) { 829 if (cla->channel[ch] == p2p->last_prog_scan_chan) { 830 found = 1; 831 break; 832 } 833 } 834 if (found) 835 break; 836 } 837 838 if (!found) { 839 /* Start from beginning */ 840 reg_class = c->reg_class[0].reg_class; 841 channel = c->reg_class[0].channel[0]; 842 } else { 843 /* Pick the next channel */ 844 ch++; 845 if (ch == cla->channels) { 846 cl++; 847 if (cl == c->reg_classes) 848 cl = 0; 849 ch = 0; 850 } 851 reg_class = c->reg_class[cl].reg_class; 852 channel = c->reg_class[cl].channel[ch]; 853 } 854 855 freq = p2p_channel_to_freq(reg_class, channel); 856 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz", 857 reg_class, channel, freq); 858 p2p->last_prog_scan_class = reg_class; 859 p2p->last_prog_scan_chan = channel; 860 861 if (freq == 2412 || freq == 2437 || freq == 2462) 862 return 0; /* No need to add social channels */ 863 return freq; 864} 865 866 867static void p2p_search(struct p2p_data *p2p) 868{ 869 int freq = 0; 870 enum p2p_scan_type type; 871 u16 pw_id = DEV_PW_DEFAULT; 872 int res; 873 874 if (p2p->drv_in_listen) { 875 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing"); 876 return; 877 } 878 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 879 880 if (p2p->find_type == P2P_FIND_PROGRESSIVE && 881 (freq = p2p_get_next_prog_freq(p2p)) > 0) { 882 type = P2P_SCAN_SOCIAL_PLUS_ONE; 883 p2p_dbg(p2p, "Starting search (+ freq %u)", freq); 884 } else { 885 type = P2P_SCAN_SOCIAL; 886 p2p_dbg(p2p, "Starting search"); 887 } 888 889 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq, 890 p2p->num_req_dev_types, p2p->req_dev_types, 891 p2p->find_dev_id, pw_id); 892 if (res < 0) { 893 p2p_dbg(p2p, "Scan request failed"); 894 p2p_continue_find(p2p); 895 } else { 896 p2p_dbg(p2p, "Running p2p_scan"); 897 p2p->p2p_scan_running = 1; 898 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 899 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 900 p2p, NULL); 901 } 902} 903 904 905static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx) 906{ 907 struct p2p_data *p2p = eloop_ctx; 908 p2p_dbg(p2p, "Find timeout -> stop"); 909 p2p_stop_find(p2p); 910} 911 912 913static int p2p_run_after_scan(struct p2p_data *p2p) 914{ 915 struct p2p_device *dev; 916 enum p2p_after_scan op; 917 918 if (p2p->after_scan_tx) { 919 p2p->after_scan_tx_in_progress = 1; 920 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion"); 921 p2p->cfg->send_action(p2p->cfg->cb_ctx, 922 p2p->after_scan_tx->freq, 923 p2p->after_scan_tx->dst, 924 p2p->after_scan_tx->src, 925 p2p->after_scan_tx->bssid, 926 (u8 *) (p2p->after_scan_tx + 1), 927 p2p->after_scan_tx->len, 928 p2p->after_scan_tx->wait_time); 929 os_free(p2p->after_scan_tx); 930 p2p->after_scan_tx = NULL; 931 return 1; 932 } 933 934 op = p2p->start_after_scan; 935 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 936 switch (op) { 937 case P2P_AFTER_SCAN_NOTHING: 938 break; 939 case P2P_AFTER_SCAN_LISTEN: 940 p2p_dbg(p2p, "Start previously requested Listen state"); 941 p2p_listen(p2p, p2p->pending_listen_sec * 1000 + 942 p2p->pending_listen_usec / 1000); 943 return 1; 944 case P2P_AFTER_SCAN_CONNECT: 945 p2p_dbg(p2p, "Start previously requested connect with " MACSTR, 946 MAC2STR(p2p->after_scan_peer)); 947 dev = p2p_get_device(p2p, p2p->after_scan_peer); 948 if (dev == NULL) { 949 p2p_dbg(p2p, "Peer not known anymore"); 950 break; 951 } 952 p2p_connect_send(p2p, dev); 953 return 1; 954 } 955 956 return 0; 957} 958 959 960static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx) 961{ 962 struct p2p_data *p2p = eloop_ctx; 963 int running; 964 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running); 965 running = p2p->p2p_scan_running; 966 /* Make sure we recover from missed scan results callback */ 967 p2p->p2p_scan_running = 0; 968 969 if (running) 970 p2p_run_after_scan(p2p); 971} 972 973 974static void p2p_free_req_dev_types(struct p2p_data *p2p) 975{ 976 p2p->num_req_dev_types = 0; 977 os_free(p2p->req_dev_types); 978 p2p->req_dev_types = NULL; 979} 980 981 982int p2p_find(struct p2p_data *p2p, unsigned int timeout, 983 enum p2p_discovery_type type, 984 unsigned int num_req_dev_types, const u8 *req_dev_types, 985 const u8 *dev_id, unsigned int search_delay) 986{ 987 int res; 988 989 p2p_dbg(p2p, "Starting find (type=%d)", type); 990 os_get_reltime(&p2p->find_start); 991 if (p2p->p2p_scan_running) { 992 p2p_dbg(p2p, "p2p_scan is already running"); 993 } 994 995 p2p_free_req_dev_types(p2p); 996 if (req_dev_types && num_req_dev_types) { 997 p2p->req_dev_types = os_malloc(num_req_dev_types * 998 WPS_DEV_TYPE_LEN); 999 if (p2p->req_dev_types == NULL) 1000 return -1; 1001 os_memcpy(p2p->req_dev_types, req_dev_types, 1002 num_req_dev_types * WPS_DEV_TYPE_LEN); 1003 p2p->num_req_dev_types = num_req_dev_types; 1004 } 1005 1006 if (dev_id) { 1007 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN); 1008 p2p->find_dev_id = p2p->find_dev_id_buf; 1009 } else 1010 p2p->find_dev_id = NULL; 1011 1012 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1013 p2p_clear_timeout(p2p); 1014 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1015 p2p->find_type = type; 1016 p2p_device_clear_reported(p2p); 1017 p2p_set_state(p2p, P2P_SEARCH); 1018 p2p->search_delay = search_delay; 1019 p2p->in_search_delay = 0; 1020 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1021 p2p->last_p2p_find_timeout = timeout; 1022 if (timeout) 1023 eloop_register_timeout(timeout, 0, p2p_find_timeout, 1024 p2p, NULL); 1025 switch (type) { 1026 case P2P_FIND_START_WITH_FULL: 1027 case P2P_FIND_PROGRESSIVE: 1028 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0, 1029 p2p->num_req_dev_types, 1030 p2p->req_dev_types, dev_id, 1031 DEV_PW_DEFAULT); 1032 break; 1033 case P2P_FIND_ONLY_SOCIAL: 1034 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0, 1035 p2p->num_req_dev_types, 1036 p2p->req_dev_types, dev_id, 1037 DEV_PW_DEFAULT); 1038 break; 1039 default: 1040 return -1; 1041 } 1042 1043 if (res == 0) { 1044 p2p_dbg(p2p, "Running p2p_scan"); 1045 p2p->p2p_scan_running = 1; 1046 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 1047 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 1048 p2p, NULL); 1049 } else if (p2p->p2p_scan_running) { 1050 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running"); 1051 /* wait for the previous p2p_scan to complete */ 1052 res = 0; /* do not report failure */ 1053 } else { 1054 p2p_dbg(p2p, "Failed to start p2p_scan"); 1055 p2p_set_state(p2p, P2P_IDLE); 1056 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1057 } 1058 1059 return res; 1060} 1061 1062 1063void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq) 1064{ 1065 p2p_dbg(p2p, "Stopping find"); 1066 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1067 p2p_clear_timeout(p2p); 1068 if (p2p->state == P2P_SEARCH) 1069 p2p->cfg->find_stopped(p2p->cfg->cb_ctx); 1070 p2p_set_state(p2p, P2P_IDLE); 1071 p2p_free_req_dev_types(p2p); 1072 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1073 if (p2p->go_neg_peer) 1074 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1075 p2p->go_neg_peer = NULL; 1076 p2p->sd_peer = NULL; 1077 p2p->invite_peer = NULL; 1078 p2p_stop_listen_for_freq(p2p, freq); 1079} 1080 1081 1082void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq) 1083{ 1084 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) { 1085 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response"); 1086 return; 1087 } 1088 if (p2p->in_listen) { 1089 p2p->in_listen = 0; 1090 p2p_clear_timeout(p2p); 1091 } 1092 if (p2p->drv_in_listen) { 1093 /* 1094 * The driver may not deliver callback to p2p_listen_end() 1095 * when the operation gets canceled, so clear the internal 1096 * variable that is tracking driver state. 1097 */ 1098 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen); 1099 p2p->drv_in_listen = 0; 1100 } 1101 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1102} 1103 1104 1105void p2p_stop_listen(struct p2p_data *p2p) 1106{ 1107 if (p2p->state != P2P_LISTEN_ONLY) { 1108 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state."); 1109 return; 1110 } 1111 1112 p2p_stop_listen_for_freq(p2p, 0); 1113 p2p_set_state(p2p, P2P_IDLE); 1114} 1115 1116 1117void p2p_stop_find(struct p2p_data *p2p) 1118{ 1119 p2p_stop_find_for_freq(p2p, 0); 1120} 1121 1122 1123static int p2p_prepare_channel_pref(struct p2p_data *p2p, 1124 unsigned int force_freq, 1125 unsigned int pref_freq, int go) 1126{ 1127 u8 op_class, op_channel; 1128 unsigned int freq = force_freq ? force_freq : pref_freq; 1129 1130 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d", 1131 force_freq, pref_freq, go); 1132 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) { 1133 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq); 1134 return -1; 1135 } 1136 1137 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) && 1138 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class, 1139 op_channel))) { 1140 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P", 1141 freq, op_class, op_channel); 1142 return -1; 1143 } 1144 1145 p2p->op_reg_class = op_class; 1146 p2p->op_channel = op_channel; 1147 1148 if (force_freq) { 1149 p2p->channels.reg_classes = 1; 1150 p2p->channels.reg_class[0].channels = 1; 1151 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 1152 p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 1153 } else { 1154 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1155 sizeof(struct p2p_channels)); 1156 } 1157 1158 return 0; 1159} 1160 1161 1162static void p2p_prepare_channel_best(struct p2p_data *p2p) 1163{ 1164 u8 op_class, op_channel; 1165 const int op_classes_5ghz[] = { 124, 115, 0 }; 1166 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 }; 1167 const int op_classes_vht[] = { 128, 0 }; 1168 1169 p2p_dbg(p2p, "Prepare channel best"); 1170 1171 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 && 1172 p2p_supported_freq(p2p, p2p->best_freq_overall) && 1173 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel) 1174 == 0) { 1175 p2p_dbg(p2p, "Select best overall channel as operating channel preference"); 1176 p2p->op_reg_class = op_class; 1177 p2p->op_channel = op_channel; 1178 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 && 1179 p2p_supported_freq(p2p, p2p->best_freq_5) && 1180 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel) 1181 == 0) { 1182 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference"); 1183 p2p->op_reg_class = op_class; 1184 p2p->op_channel = op_channel; 1185 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 && 1186 p2p_supported_freq(p2p, p2p->best_freq_24) && 1187 p2p_freq_to_channel(p2p->best_freq_24, &op_class, 1188 &op_channel) == 0) { 1189 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference"); 1190 p2p->op_reg_class = op_class; 1191 p2p->op_channel = op_channel; 1192 } else if (p2p->cfg->num_pref_chan > 0 && 1193 p2p_channels_includes(&p2p->cfg->channels, 1194 p2p->cfg->pref_chan[0].op_class, 1195 p2p->cfg->pref_chan[0].chan)) { 1196 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference"); 1197 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class; 1198 p2p->op_channel = p2p->cfg->pref_chan[0].chan; 1199 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht, 1200 &p2p->op_reg_class, &p2p->op_channel) == 1201 0) { 1202 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference", 1203 p2p->op_reg_class, p2p->op_channel); 1204 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40, 1205 &p2p->op_reg_class, &p2p->op_channel) == 1206 0) { 1207 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference", 1208 p2p->op_reg_class, p2p->op_channel); 1209 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz, 1210 &p2p->op_reg_class, &p2p->op_channel) == 1211 0) { 1212 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference", 1213 p2p->op_reg_class, p2p->op_channel); 1214 } else { 1215 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference"); 1216 p2p->op_reg_class = p2p->cfg->op_reg_class; 1217 p2p->op_channel = p2p->cfg->op_channel; 1218 } 1219 1220 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1221 sizeof(struct p2p_channels)); 1222} 1223 1224 1225/** 1226 * p2p_prepare_channel - Select operating channel for GO Negotiation 1227 * @p2p: P2P module context from p2p_init() 1228 * @dev: Selected peer device 1229 * @force_freq: Forced frequency in MHz or 0 if not forced 1230 * @pref_freq: Preferred frequency in MHz or 0 if no preference 1231 * @go: Whether the local end will be forced to be GO 1232 * Returns: 0 on success, -1 on failure (channel not supported for P2P) 1233 * 1234 * This function is used to do initial operating channel selection for GO 1235 * Negotiation prior to having received peer information. The selected channel 1236 * may be further optimized in p2p_reselect_channel() once the peer information 1237 * is available. 1238 */ 1239int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev, 1240 unsigned int force_freq, unsigned int pref_freq, int go) 1241{ 1242 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d", 1243 force_freq, pref_freq, go); 1244 if (force_freq || pref_freq) { 1245 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) < 1246 0) 1247 return -1; 1248 } else { 1249 p2p_prepare_channel_best(p2p); 1250 } 1251 p2p_channels_dump(p2p, "prepared channels", &p2p->channels); 1252 if (go) 1253 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq); 1254 else if (!force_freq) 1255 p2p_channels_union(&p2p->channels, &p2p->cfg->cli_channels, 1256 &p2p->channels); 1257 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels); 1258 1259 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s", 1260 p2p->op_reg_class, p2p->op_channel, 1261 force_freq ? " (forced)" : ""); 1262 1263 if (force_freq) 1264 dev->flags |= P2P_DEV_FORCE_FREQ; 1265 else 1266 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1267 1268 return 0; 1269} 1270 1271 1272static void p2p_set_dev_persistent(struct p2p_device *dev, 1273 int persistent_group) 1274{ 1275 switch (persistent_group) { 1276 case 0: 1277 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP | 1278 P2P_DEV_PREFER_PERSISTENT_RECONN); 1279 break; 1280 case 1: 1281 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP; 1282 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN; 1283 break; 1284 case 2: 1285 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP | 1286 P2P_DEV_PREFER_PERSISTENT_RECONN; 1287 break; 1288 } 1289} 1290 1291 1292int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr, 1293 enum p2p_wps_method wps_method, 1294 int go_intent, const u8 *own_interface_addr, 1295 unsigned int force_freq, int persistent_group, 1296 const u8 *force_ssid, size_t force_ssid_len, 1297 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id) 1298{ 1299 struct p2p_device *dev; 1300 1301 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR 1302 " GO Intent=%d Intended Interface Address=" MACSTR 1303 " wps_method=%d persistent_group=%d pd_before_go_neg=%d " 1304 "oob_pw_id=%u", 1305 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1306 wps_method, persistent_group, pd_before_go_neg, oob_pw_id); 1307 1308 dev = p2p_get_device(p2p, peer_addr); 1309 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 1310 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR, 1311 MAC2STR(peer_addr)); 1312 return -1; 1313 } 1314 1315 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, 1316 go_intent == 15) < 0) 1317 return -1; 1318 1319 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 1320 if (!(dev->info.dev_capab & 1321 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 1322 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1323 " that is in a group and is not discoverable", 1324 MAC2STR(peer_addr)); 1325 return -1; 1326 } 1327 if (dev->oper_freq <= 0) { 1328 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1329 " with incomplete information", 1330 MAC2STR(peer_addr)); 1331 return -1; 1332 } 1333 1334 /* 1335 * First, try to connect directly. If the peer does not 1336 * acknowledge frames, assume it is sleeping and use device 1337 * discoverability via the GO at that point. 1338 */ 1339 } 1340 1341 p2p->ssid_set = 0; 1342 if (force_ssid) { 1343 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1344 force_ssid, force_ssid_len); 1345 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1346 p2p->ssid_len = force_ssid_len; 1347 p2p->ssid_set = 1; 1348 } 1349 1350 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1351 dev->flags &= ~P2P_DEV_USER_REJECTED; 1352 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 1353 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1354 if (pd_before_go_neg) 1355 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG; 1356 else { 1357 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG; 1358 /* 1359 * Assign dialog token and tie breaker here to use the same 1360 * values in each retry within the same GO Negotiation exchange. 1361 */ 1362 dev->dialog_token++; 1363 if (dev->dialog_token == 0) 1364 dev->dialog_token = 1; 1365 dev->tie_breaker = p2p->next_tie_breaker; 1366 p2p->next_tie_breaker = !p2p->next_tie_breaker; 1367 } 1368 dev->connect_reqs = 0; 1369 dev->go_neg_req_sent = 0; 1370 dev->go_state = UNKNOWN_GO; 1371 p2p_set_dev_persistent(dev, persistent_group); 1372 p2p->go_intent = go_intent; 1373 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1374 1375 if (p2p->state != P2P_IDLE) 1376 p2p_stop_find(p2p); 1377 1378 if (p2p->after_scan_tx) { 1379 /* 1380 * We need to drop the pending frame to avoid issues with the 1381 * new GO Negotiation, e.g., when the pending frame was from a 1382 * previous attempt at starting a GO Negotiation. 1383 */ 1384 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion"); 1385 os_free(p2p->after_scan_tx); 1386 p2p->after_scan_tx = NULL; 1387 } 1388 1389 dev->wps_method = wps_method; 1390 dev->oob_pw_id = oob_pw_id; 1391 dev->status = P2P_SC_SUCCESS; 1392 1393 if (p2p->p2p_scan_running) { 1394 p2p_dbg(p2p, "p2p_scan running - delay connect send"); 1395 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT; 1396 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN); 1397 return 0; 1398 } 1399 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1400 1401 return p2p_connect_send(p2p, dev); 1402} 1403 1404 1405int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr, 1406 enum p2p_wps_method wps_method, 1407 int go_intent, const u8 *own_interface_addr, 1408 unsigned int force_freq, int persistent_group, 1409 const u8 *force_ssid, size_t force_ssid_len, 1410 unsigned int pref_freq, u16 oob_pw_id) 1411{ 1412 struct p2p_device *dev; 1413 1414 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR 1415 " GO Intent=%d Intended Interface Address=" MACSTR 1416 " wps_method=%d persistent_group=%d oob_pw_id=%u", 1417 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1418 wps_method, persistent_group, oob_pw_id); 1419 1420 dev = p2p_get_device(p2p, peer_addr); 1421 if (dev == NULL) { 1422 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR, 1423 MAC2STR(peer_addr)); 1424 return -1; 1425 } 1426 1427 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent == 1428 15) < 0) 1429 return -1; 1430 1431 p2p->ssid_set = 0; 1432 if (force_ssid) { 1433 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1434 force_ssid, force_ssid_len); 1435 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1436 p2p->ssid_len = force_ssid_len; 1437 p2p->ssid_set = 1; 1438 } 1439 1440 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1441 dev->flags &= ~P2P_DEV_USER_REJECTED; 1442 dev->go_neg_req_sent = 0; 1443 dev->go_state = UNKNOWN_GO; 1444 p2p_set_dev_persistent(dev, persistent_group); 1445 p2p->go_intent = go_intent; 1446 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1447 1448 dev->wps_method = wps_method; 1449 dev->oob_pw_id = oob_pw_id; 1450 dev->status = P2P_SC_SUCCESS; 1451 1452 return 0; 1453} 1454 1455 1456void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr, 1457 struct p2p_device *dev, struct p2p_message *msg) 1458{ 1459 os_get_reltime(&dev->last_seen); 1460 1461 p2p_copy_wps_info(p2p, dev, 0, msg); 1462 1463 if (msg->listen_channel) { 1464 int freq; 1465 freq = p2p_channel_to_freq(msg->listen_channel[3], 1466 msg->listen_channel[4]); 1467 if (freq < 0) { 1468 p2p_dbg(p2p, "Unknown peer Listen channel: " 1469 "country=%c%c(0x%02x) reg_class=%u channel=%u", 1470 msg->listen_channel[0], 1471 msg->listen_channel[1], 1472 msg->listen_channel[2], 1473 msg->listen_channel[3], 1474 msg->listen_channel[4]); 1475 } else { 1476 p2p_dbg(p2p, "Update peer " MACSTR 1477 " Listen channel: %u -> %u MHz", 1478 MAC2STR(dev->info.p2p_device_addr), 1479 dev->listen_freq, freq); 1480 dev->listen_freq = freq; 1481 } 1482 } 1483 1484 if (msg->wfd_subelems) { 1485 wpabuf_free(dev->info.wfd_subelems); 1486 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems); 1487 } 1488 1489 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 1490 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 1491 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request"); 1492 } else { 1493 p2p_dbg(p2p, "Created device entry based on GO Neg Req: " 1494 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' " 1495 "listen_freq=%d", 1496 MAC2STR(dev->info.p2p_device_addr), 1497 dev->info.dev_capab, dev->info.group_capab, 1498 dev->info.device_name, dev->listen_freq); 1499 } 1500 1501 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY; 1502 1503 if (dev->flags & P2P_DEV_USER_REJECTED) { 1504 p2p_dbg(p2p, "Do not report rejected device"); 1505 return; 1506 } 1507 1508 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 1509 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 1510 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 1511} 1512 1513 1514void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len) 1515{ 1516 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 1517 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2); 1518 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2], 1519 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len); 1520 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len; 1521} 1522 1523 1524int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params) 1525{ 1526 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len); 1527 p2p_random(params->passphrase, 8); 1528 return 0; 1529} 1530 1531 1532void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer) 1533{ 1534 struct p2p_go_neg_results res; 1535 int go = peer->go_state == LOCAL_GO; 1536 struct p2p_channels intersection; 1537 int freqs; 1538 size_t i, j; 1539 1540 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)", 1541 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer"); 1542 1543 os_memset(&res, 0, sizeof(res)); 1544 res.role_go = go; 1545 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 1546 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 1547 res.wps_method = peer->wps_method; 1548 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 1549 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 1550 res.persistent_group = 2; 1551 else 1552 res.persistent_group = 1; 1553 } 1554 1555 if (go) { 1556 /* Setup AP mode for WPS provisioning */ 1557 res.freq = p2p_channel_to_freq(p2p->op_reg_class, 1558 p2p->op_channel); 1559 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1560 res.ssid_len = p2p->ssid_len; 1561 p2p_random(res.passphrase, 8); 1562 } else { 1563 res.freq = peer->oper_freq; 1564 if (p2p->ssid_len) { 1565 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1566 res.ssid_len = p2p->ssid_len; 1567 } 1568 } 1569 1570 p2p_channels_dump(p2p, "own channels", &p2p->channels); 1571 p2p_channels_dump(p2p, "peer channels", &peer->channels); 1572 p2p_channels_intersect(&p2p->channels, &peer->channels, 1573 &intersection); 1574 if (go) { 1575 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq); 1576 p2p_channels_dump(p2p, "intersection after no-GO removal", 1577 &intersection); 1578 } 1579 freqs = 0; 1580 for (i = 0; i < intersection.reg_classes; i++) { 1581 struct p2p_reg_class *c = &intersection.reg_class[i]; 1582 if (freqs + 1 == P2P_MAX_CHANNELS) 1583 break; 1584 for (j = 0; j < c->channels; j++) { 1585 int freq; 1586 if (freqs + 1 == P2P_MAX_CHANNELS) 1587 break; 1588 freq = p2p_channel_to_freq(c->reg_class, c->channel[j]); 1589 if (freq < 0) 1590 continue; 1591 res.freq_list[freqs++] = freq; 1592 } 1593 } 1594 1595 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout; 1596 1597 p2p_clear_timeout(p2p); 1598 p2p->ssid_set = 0; 1599 peer->go_neg_req_sent = 0; 1600 peer->wps_method = WPS_NOT_READY; 1601 peer->oob_pw_id = 0; 1602 1603 p2p_set_state(p2p, P2P_PROVISIONING); 1604 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 1605} 1606 1607 1608static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa, 1609 const u8 *data, size_t len, int rx_freq) 1610{ 1611 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa)); 1612 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len); 1613 1614 if (len < 1) 1615 return; 1616 1617 switch (data[0]) { 1618 case P2P_GO_NEG_REQ: 1619 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq); 1620 break; 1621 case P2P_GO_NEG_RESP: 1622 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq); 1623 break; 1624 case P2P_GO_NEG_CONF: 1625 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1); 1626 break; 1627 case P2P_INVITATION_REQ: 1628 p2p_process_invitation_req(p2p, sa, data + 1, len - 1, 1629 rx_freq); 1630 break; 1631 case P2P_INVITATION_RESP: 1632 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 1633 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1); 1634 break; 1635 case P2P_PROV_DISC_REQ: 1636 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1637 break; 1638 case P2P_PROV_DISC_RESP: 1639 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1); 1640 break; 1641 case P2P_DEV_DISC_REQ: 1642 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1643 break; 1644 case P2P_DEV_DISC_RESP: 1645 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1); 1646 break; 1647 default: 1648 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d", 1649 data[0]); 1650 break; 1651 } 1652} 1653 1654 1655static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, 1656 const u8 *sa, const u8 *bssid, const u8 *data, 1657 size_t len, int freq) 1658{ 1659 if (len < 1) 1660 return; 1661 1662 switch (data[0]) { 1663 case WLAN_PA_VENDOR_SPECIFIC: 1664 data++; 1665 len--; 1666 if (len < 3) 1667 return; 1668 if (WPA_GET_BE24(data) != OUI_WFA) 1669 return; 1670 1671 data += 3; 1672 len -= 3; 1673 if (len < 1) 1674 return; 1675 1676 if (*data != P2P_OUI_TYPE) 1677 return; 1678 1679 p2p_rx_p2p_action(p2p, sa, data + 1, len - 1, freq); 1680 break; 1681 case WLAN_PA_GAS_INITIAL_REQ: 1682 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq); 1683 break; 1684 case WLAN_PA_GAS_INITIAL_RESP: 1685 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq); 1686 break; 1687 case WLAN_PA_GAS_COMEBACK_REQ: 1688 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq); 1689 break; 1690 case WLAN_PA_GAS_COMEBACK_RESP: 1691 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq); 1692 break; 1693 } 1694} 1695 1696 1697void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa, 1698 const u8 *bssid, u8 category, 1699 const u8 *data, size_t len, int freq) 1700{ 1701 if (category == WLAN_ACTION_PUBLIC) { 1702 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq); 1703 return; 1704 } 1705 1706 if (category != WLAN_ACTION_VENDOR_SPECIFIC) 1707 return; 1708 1709 if (len < 4) 1710 return; 1711 1712 if (WPA_GET_BE24(data) != OUI_WFA) 1713 return; 1714 data += 3; 1715 len -= 3; 1716 1717 if (*data != P2P_OUI_TYPE) 1718 return; 1719 data++; 1720 len--; 1721 1722 /* P2P action frame */ 1723 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa)); 1724 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len); 1725 1726 if (len < 1) 1727 return; 1728 switch (data[0]) { 1729 case P2P_NOA: 1730 p2p_dbg(p2p, "Received P2P Action - Notice of Absence"); 1731 /* TODO */ 1732 break; 1733 case P2P_PRESENCE_REQ: 1734 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq); 1735 break; 1736 case P2P_PRESENCE_RESP: 1737 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1); 1738 break; 1739 case P2P_GO_DISC_REQ: 1740 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq); 1741 break; 1742 default: 1743 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]); 1744 break; 1745 } 1746} 1747 1748 1749static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx) 1750{ 1751 struct p2p_data *p2p = eloop_ctx; 1752 if (p2p->go_neg_peer == NULL) 1753 return; 1754 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1755 p2p->go_neg_peer->status = P2P_SC_SUCCESS; 1756 p2p_connect_send(p2p, p2p->go_neg_peer); 1757} 1758 1759 1760static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx) 1761{ 1762 struct p2p_data *p2p = eloop_ctx; 1763 if (p2p->invite_peer == NULL) 1764 return; 1765 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1766 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr, 1767 p2p->invite_dev_pw_id); 1768} 1769 1770 1771static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr, 1772 const u8 *ie, size_t ie_len) 1773{ 1774 struct p2p_message msg; 1775 struct p2p_device *dev; 1776 1777 os_memset(&msg, 0, sizeof(msg)); 1778 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL) 1779 { 1780 p2p_parse_free(&msg); 1781 return; /* not a P2P probe */ 1782 } 1783 1784 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 1785 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 1786 != 0) { 1787 /* The Probe Request is not part of P2P Device Discovery. It is 1788 * not known whether the source address of the frame is the P2P 1789 * Device Address or P2P Interface Address. Do not add a new 1790 * peer entry based on this frames. 1791 */ 1792 p2p_parse_free(&msg); 1793 return; 1794 } 1795 1796 dev = p2p_get_device(p2p, addr); 1797 if (dev) { 1798 if (dev->country[0] == 0 && msg.listen_channel) 1799 os_memcpy(dev->country, msg.listen_channel, 3); 1800 os_get_reltime(&dev->last_seen); 1801 p2p_parse_free(&msg); 1802 return; /* already known */ 1803 } 1804 1805 dev = p2p_create_device(p2p, addr); 1806 if (dev == NULL) { 1807 p2p_parse_free(&msg); 1808 return; 1809 } 1810 1811 os_get_reltime(&dev->last_seen); 1812 dev->flags |= P2P_DEV_PROBE_REQ_ONLY; 1813 1814 if (msg.listen_channel) { 1815 os_memcpy(dev->country, msg.listen_channel, 3); 1816 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3], 1817 msg.listen_channel[4]); 1818 } 1819 1820 p2p_copy_wps_info(p2p, dev, 1, &msg); 1821 1822 if (msg.wfd_subelems) { 1823 wpabuf_free(dev->info.wfd_subelems); 1824 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 1825 } 1826 1827 p2p_parse_free(&msg); 1828 1829 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR 1830 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d", 1831 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab, 1832 dev->info.group_capab, dev->info.device_name, 1833 dev->listen_freq); 1834} 1835 1836 1837struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p, 1838 const u8 *addr, 1839 struct p2p_message *msg) 1840{ 1841 struct p2p_device *dev; 1842 1843 dev = p2p_get_device(p2p, addr); 1844 if (dev) { 1845 os_get_reltime(&dev->last_seen); 1846 return dev; /* already known */ 1847 } 1848 1849 dev = p2p_create_device(p2p, addr); 1850 if (dev == NULL) 1851 return NULL; 1852 1853 p2p_add_dev_info(p2p, addr, dev, msg); 1854 1855 return dev; 1856} 1857 1858 1859static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type) 1860{ 1861 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0) 1862 return 1; 1863 if (os_memcmp(dev_type, req_dev_type, 2) == 0 && 1864 WPA_GET_BE32(&req_dev_type[2]) == 0 && 1865 WPA_GET_BE16(&req_dev_type[6]) == 0) 1866 return 1; /* Category match with wildcard OUI/sub-category */ 1867 return 0; 1868} 1869 1870 1871int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[], 1872 size_t num_req_dev_type) 1873{ 1874 size_t i; 1875 for (i = 0; i < num_req_dev_type; i++) { 1876 if (dev_type_match(dev_type, req_dev_type[i])) 1877 return 1; 1878 } 1879 return 0; 1880} 1881 1882 1883/** 1884 * p2p_match_dev_type - Match local device type with requested type 1885 * @p2p: P2P module context from p2p_init() 1886 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) 1887 * Returns: 1 on match, 0 on mismatch 1888 * 1889 * This function can be used to match the Requested Device Type attribute in 1890 * WPS IE with the local device types for deciding whether to reply to a Probe 1891 * Request frame. 1892 */ 1893int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps) 1894{ 1895 struct wps_parse_attr attr; 1896 size_t i; 1897 1898 if (wps_parse_msg(wps, &attr)) 1899 return 1; /* assume no Requested Device Type attributes */ 1900 1901 if (attr.num_req_dev_type == 0) 1902 return 1; /* no Requested Device Type attributes -> match */ 1903 1904 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type, 1905 attr.num_req_dev_type)) 1906 return 1; /* Own Primary Device Type matches */ 1907 1908 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) 1909 if (dev_type_list_match(p2p->cfg->sec_dev_type[i], 1910 attr.req_dev_type, 1911 attr.num_req_dev_type)) 1912 return 1; /* Own Secondary Device Type matches */ 1913 1914 /* No matching device type found */ 1915 return 0; 1916} 1917 1918 1919struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p) 1920{ 1921 struct wpabuf *buf; 1922 u8 *len; 1923 int pw_id = -1; 1924 size_t extra = 0; 1925 1926#ifdef CONFIG_WIFI_DISPLAY 1927 if (p2p->wfd_ie_probe_resp) 1928 extra = wpabuf_len(p2p->wfd_ie_probe_resp); 1929#endif /* CONFIG_WIFI_DISPLAY */ 1930 1931 buf = wpabuf_alloc(1000 + extra); 1932 if (buf == NULL) 1933 return NULL; 1934 1935 if (p2p->go_neg_peer) { 1936 /* Advertise immediate availability of WPS credential */ 1937 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method); 1938 } 1939 1940 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) { 1941 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response"); 1942 wpabuf_free(buf); 1943 return NULL; 1944 } 1945 1946#ifdef CONFIG_WIFI_DISPLAY 1947 if (p2p->wfd_ie_probe_resp) 1948 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp); 1949#endif /* CONFIG_WIFI_DISPLAY */ 1950 1951 /* P2P IE */ 1952 len = p2p_buf_add_ie_hdr(buf); 1953 p2p_buf_add_capability(buf, p2p->dev_capab & 1954 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 1955 if (p2p->ext_listen_interval) 1956 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 1957 p2p->ext_listen_interval); 1958 p2p_buf_add_device_info(buf, p2p, NULL); 1959 p2p_buf_update_ie_hdr(buf, len); 1960 1961 return buf; 1962} 1963 1964 1965static enum p2p_probe_req_status 1966p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 1967 const u8 *bssid, const u8 *ie, size_t ie_len) 1968{ 1969 struct ieee802_11_elems elems; 1970 struct wpabuf *buf; 1971 struct ieee80211_mgmt *resp; 1972 struct p2p_message msg; 1973 struct wpabuf *ies; 1974 1975 if (!p2p->in_listen || !p2p->drv_in_listen) { 1976 /* not in Listen state - ignore Probe Request */ 1977 return P2P_PREQ_NOT_LISTEN; 1978 } 1979 1980 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) == 1981 ParseFailed) { 1982 /* Ignore invalid Probe Request frames */ 1983 return P2P_PREQ_MALFORMED; 1984 } 1985 1986 if (elems.p2p == NULL) { 1987 /* not a P2P probe - ignore it */ 1988 return P2P_PREQ_NOT_P2P; 1989 } 1990 1991 if (dst && !is_broadcast_ether_addr(dst) && 1992 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 1993 /* Not sent to the broadcast address or our P2P Device Address 1994 */ 1995 return P2P_PREQ_NOT_PROCESSED; 1996 } 1997 1998 if (bssid && !is_broadcast_ether_addr(bssid)) { 1999 /* Not sent to the Wildcard BSSID */ 2000 return P2P_PREQ_NOT_PROCESSED; 2001 } 2002 2003 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN || 2004 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) != 2005 0) { 2006 /* not using P2P Wildcard SSID - ignore */ 2007 return P2P_PREQ_NOT_PROCESSED; 2008 } 2009 2010 if (supp_rates_11b_only(&elems)) { 2011 /* Indicates support for 11b rates only */ 2012 return P2P_PREQ_NOT_P2P; 2013 } 2014 2015 os_memset(&msg, 0, sizeof(msg)); 2016 if (p2p_parse_ies(ie, ie_len, &msg) < 0) { 2017 /* Could not parse P2P attributes */ 2018 return P2P_PREQ_NOT_P2P; 2019 } 2020 2021 if (msg.device_id && 2022 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2023 /* Device ID did not match */ 2024 p2p_parse_free(&msg); 2025 return P2P_PREQ_NOT_PROCESSED; 2026 } 2027 2028 /* Check Requested Device Type match */ 2029 if (msg.wps_attributes && 2030 !p2p_match_dev_type(p2p, msg.wps_attributes)) { 2031 /* No match with Requested Device Type */ 2032 p2p_parse_free(&msg); 2033 return P2P_PREQ_NOT_PROCESSED; 2034 } 2035 p2p_parse_free(&msg); 2036 2037 if (!p2p->cfg->send_probe_resp) { 2038 /* Response generated elsewhere */ 2039 return P2P_PREQ_NOT_PROCESSED; 2040 } 2041 2042 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state"); 2043 2044 /* 2045 * We do not really have a specific BSS that this frame is advertising, 2046 * so build a frame that has some information in valid format. This is 2047 * really only used for discovery purposes, not to learn exact BSS 2048 * parameters. 2049 */ 2050 ies = p2p_build_probe_resp_ies(p2p); 2051 if (ies == NULL) 2052 return P2P_PREQ_NOT_PROCESSED; 2053 2054 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 2055 if (buf == NULL) { 2056 wpabuf_free(ies); 2057 return P2P_PREQ_NOT_PROCESSED; 2058 } 2059 2060 resp = NULL; 2061 resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp); 2062 2063 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 2064 (WLAN_FC_STYPE_PROBE_RESP << 4)); 2065 os_memcpy(resp->da, addr, ETH_ALEN); 2066 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN); 2067 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN); 2068 resp->u.probe_resp.beacon_int = host_to_le16(100); 2069 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 2070 resp->u.probe_resp.capab_info = 2071 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE | 2072 WLAN_CAPABILITY_PRIVACY | 2073 WLAN_CAPABILITY_SHORT_SLOT_TIME); 2074 2075 wpabuf_put_u8(buf, WLAN_EID_SSID); 2076 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN); 2077 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 2078 2079 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES); 2080 wpabuf_put_u8(buf, 8); 2081 wpabuf_put_u8(buf, (60 / 5) | 0x80); 2082 wpabuf_put_u8(buf, 90 / 5); 2083 wpabuf_put_u8(buf, (120 / 5) | 0x80); 2084 wpabuf_put_u8(buf, 180 / 5); 2085 wpabuf_put_u8(buf, (240 / 5) | 0x80); 2086 wpabuf_put_u8(buf, 360 / 5); 2087 wpabuf_put_u8(buf, 480 / 5); 2088 wpabuf_put_u8(buf, 540 / 5); 2089 2090 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS); 2091 wpabuf_put_u8(buf, 1); 2092 wpabuf_put_u8(buf, p2p->cfg->channel); 2093 2094 wpabuf_put_buf(buf, ies); 2095 wpabuf_free(ies); 2096 2097 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf); 2098 2099 wpabuf_free(buf); 2100 2101 return P2P_PREQ_NOT_PROCESSED; 2102} 2103 2104 2105enum p2p_probe_req_status 2106p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2107 const u8 *bssid, const u8 *ie, size_t ie_len) 2108{ 2109 enum p2p_probe_req_status res; 2110 2111 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len); 2112 2113 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len); 2114 2115 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) && 2116 p2p->go_neg_peer && 2117 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN) 2118 == 0 && 2119 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 2120 /* Received a Probe Request from GO Negotiation peer */ 2121 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout"); 2122 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2123 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL); 2124 return P2P_PREQ_PROCESSED; 2125 } 2126 2127 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) && 2128 p2p->invite_peer && 2129 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) && 2130 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN) 2131 == 0) { 2132 /* Received a Probe Request from Invite peer */ 2133 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout"); 2134 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL); 2135 return P2P_PREQ_PROCESSED; 2136 } 2137 2138 return res; 2139} 2140 2141 2142static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid, 2143 u8 *buf, size_t len, struct wpabuf *p2p_ie) 2144{ 2145 struct wpabuf *tmp; 2146 u8 *lpos; 2147 size_t tmplen; 2148 int res; 2149 u8 group_capab; 2150 2151 if (p2p_ie == NULL) 2152 return 0; /* WLAN AP is not a P2P manager */ 2153 2154 /* 2155 * (Re)Association Request - P2P IE 2156 * P2P Capability attribute (shall be present) 2157 * P2P Interface attribute (present if concurrent device and 2158 * P2P Management is enabled) 2159 */ 2160 tmp = wpabuf_alloc(200); 2161 if (tmp == NULL) 2162 return -1; 2163 2164 lpos = p2p_buf_add_ie_hdr(tmp); 2165 group_capab = 0; 2166 if (p2p->num_groups > 0) { 2167 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; 2168 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2169 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) && 2170 p2p->cross_connect) 2171 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 2172 } 2173 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab); 2174 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2175 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED)) 2176 p2p_buf_add_p2p_interface(tmp, p2p); 2177 p2p_buf_update_ie_hdr(tmp, lpos); 2178 2179 tmplen = wpabuf_len(tmp); 2180 if (tmplen > len) 2181 res = -1; 2182 else { 2183 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2184 res = tmplen; 2185 } 2186 wpabuf_free(tmp); 2187 2188 return res; 2189} 2190 2191 2192int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf, 2193 size_t len, int p2p_group, struct wpabuf *p2p_ie) 2194{ 2195 struct wpabuf *tmp; 2196 u8 *lpos; 2197 struct p2p_device *peer; 2198 size_t tmplen; 2199 int res; 2200 size_t extra = 0; 2201 2202 if (!p2p_group) 2203 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie); 2204 2205#ifdef CONFIG_WIFI_DISPLAY 2206 if (p2p->wfd_ie_assoc_req) 2207 extra = wpabuf_len(p2p->wfd_ie_assoc_req); 2208#endif /* CONFIG_WIFI_DISPLAY */ 2209 2210 /* 2211 * (Re)Association Request - P2P IE 2212 * P2P Capability attribute (shall be present) 2213 * Extended Listen Timing (may be present) 2214 * P2P Device Info attribute (shall be present) 2215 */ 2216 tmp = wpabuf_alloc(200 + extra); 2217 if (tmp == NULL) 2218 return -1; 2219 2220#ifdef CONFIG_WIFI_DISPLAY 2221 if (p2p->wfd_ie_assoc_req) 2222 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req); 2223#endif /* CONFIG_WIFI_DISPLAY */ 2224 2225 peer = bssid ? p2p_get_device(p2p, bssid) : NULL; 2226 2227 lpos = p2p_buf_add_ie_hdr(tmp); 2228 p2p_buf_add_capability(tmp, p2p->dev_capab, 0); 2229 if (p2p->ext_listen_interval) 2230 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period, 2231 p2p->ext_listen_interval); 2232 p2p_buf_add_device_info(tmp, p2p, peer); 2233 p2p_buf_update_ie_hdr(tmp, lpos); 2234 2235 tmplen = wpabuf_len(tmp); 2236 if (tmplen > len) 2237 res = -1; 2238 else { 2239 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2240 res = tmplen; 2241 } 2242 wpabuf_free(tmp); 2243 2244 return res; 2245} 2246 2247 2248int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) 2249{ 2250 struct wpabuf *p2p_ie; 2251 int ret; 2252 2253 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); 2254 if (p2p_ie == NULL) 2255 return 0; 2256 2257 ret = p2p_attr_text(p2p_ie, buf, end); 2258 wpabuf_free(p2p_ie); 2259 return ret; 2260} 2261 2262 2263int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr) 2264{ 2265 struct p2p_message msg; 2266 2267 os_memset(&msg, 0, sizeof(msg)); 2268 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 2269 return -1; 2270 2271 if (msg.p2p_device_addr) { 2272 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); 2273 return 0; 2274 } else if (msg.device_id) { 2275 os_memcpy(dev_addr, msg.device_id, ETH_ALEN); 2276 return 0; 2277 } 2278 return -1; 2279} 2280 2281 2282int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr) 2283{ 2284 struct wpabuf *p2p_ie; 2285 int ret; 2286 2287 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 2288 P2P_IE_VENDOR_TYPE); 2289 if (p2p_ie == NULL) 2290 return -1; 2291 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr); 2292 wpabuf_free(p2p_ie); 2293 return ret; 2294} 2295 2296 2297static void p2p_clear_go_neg(struct p2p_data *p2p) 2298{ 2299 p2p->go_neg_peer = NULL; 2300 p2p_clear_timeout(p2p); 2301 p2p_set_state(p2p, P2P_IDLE); 2302} 2303 2304 2305void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr) 2306{ 2307 if (p2p->go_neg_peer == NULL) { 2308 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification"); 2309 return; /* No pending Group Formation */ 2310 } 2311 2312 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) != 2313 0) { 2314 p2p_dbg(p2p, "Ignore WPS registration success notification for " 2315 MACSTR " (GO Negotiation peer " MACSTR ")", 2316 MAC2STR(mac_addr), 2317 MAC2STR(p2p->go_neg_peer->intended_addr)); 2318 return; /* Ignore unexpected peer address */ 2319 } 2320 2321 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR, 2322 MAC2STR(mac_addr)); 2323 2324 p2p_clear_go_neg(p2p); 2325} 2326 2327 2328void p2p_group_formation_failed(struct p2p_data *p2p) 2329{ 2330 if (p2p->go_neg_peer == NULL) { 2331 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification"); 2332 return; /* No pending Group Formation */ 2333 } 2334 2335 p2p_dbg(p2p, "Group Formation failed with " MACSTR, 2336 MAC2STR(p2p->go_neg_peer->intended_addr)); 2337 2338 p2p_clear_go_neg(p2p); 2339} 2340 2341 2342struct p2p_data * p2p_init(const struct p2p_config *cfg) 2343{ 2344 struct p2p_data *p2p; 2345 2346 if (cfg->max_peers < 1) 2347 return NULL; 2348 2349 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg)); 2350 if (p2p == NULL) 2351 return NULL; 2352 p2p->cfg = (struct p2p_config *) (p2p + 1); 2353 os_memcpy(p2p->cfg, cfg, sizeof(*cfg)); 2354 if (cfg->dev_name) 2355 p2p->cfg->dev_name = os_strdup(cfg->dev_name); 2356 if (cfg->manufacturer) 2357 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer); 2358 if (cfg->model_name) 2359 p2p->cfg->model_name = os_strdup(cfg->model_name); 2360 if (cfg->model_number) 2361 p2p->cfg->model_number = os_strdup(cfg->model_number); 2362 if (cfg->serial_number) 2363 p2p->cfg->serial_number = os_strdup(cfg->serial_number); 2364 if (cfg->pref_chan) { 2365 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan * 2366 sizeof(struct p2p_channel)); 2367 if (p2p->cfg->pref_chan) { 2368 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan, 2369 cfg->num_pref_chan * 2370 sizeof(struct p2p_channel)); 2371 } else 2372 p2p->cfg->num_pref_chan = 0; 2373 } 2374 2375 p2p->min_disc_int = 1; 2376 p2p->max_disc_int = 3; 2377 p2p->max_disc_tu = -1; 2378 2379 os_get_random(&p2p->next_tie_breaker, 1); 2380 p2p->next_tie_breaker &= 0x01; 2381 if (cfg->sd_request) 2382 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 2383 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE; 2384 if (cfg->concurrent_operations) 2385 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER; 2386 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 2387 2388 dl_list_init(&p2p->devices); 2389 2390 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 2391 p2p_expiration_timeout, p2p, NULL); 2392 2393 p2p->go_timeout = 100; 2394 p2p->client_timeout = 20; 2395 2396 p2p_dbg(p2p, "initialized"); 2397 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 2398 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 2399 2400 return p2p; 2401} 2402 2403 2404void p2p_deinit(struct p2p_data *p2p) 2405{ 2406#ifdef CONFIG_WIFI_DISPLAY 2407 wpabuf_free(p2p->wfd_ie_beacon); 2408 wpabuf_free(p2p->wfd_ie_probe_req); 2409 wpabuf_free(p2p->wfd_ie_probe_resp); 2410 wpabuf_free(p2p->wfd_ie_assoc_req); 2411 wpabuf_free(p2p->wfd_ie_invitation); 2412 wpabuf_free(p2p->wfd_ie_prov_disc_req); 2413 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 2414 wpabuf_free(p2p->wfd_ie_go_neg); 2415 wpabuf_free(p2p->wfd_dev_info); 2416 wpabuf_free(p2p->wfd_assoc_bssid); 2417 wpabuf_free(p2p->wfd_coupled_sink_info); 2418#endif /* CONFIG_WIFI_DISPLAY */ 2419 2420 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL); 2421 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 2422 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2423 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2424 p2p_flush(p2p); 2425 p2p_free_req_dev_types(p2p); 2426 os_free(p2p->cfg->dev_name); 2427 os_free(p2p->cfg->manufacturer); 2428 os_free(p2p->cfg->model_name); 2429 os_free(p2p->cfg->model_number); 2430 os_free(p2p->cfg->serial_number); 2431 os_free(p2p->cfg->pref_chan); 2432 os_free(p2p->groups); 2433 wpabuf_free(p2p->sd_resp); 2434 os_free(p2p->after_scan_tx); 2435 p2p_remove_wps_vendor_extensions(p2p); 2436 os_free(p2p->no_go_freq.range); 2437 os_free(p2p); 2438} 2439 2440 2441void p2p_flush(struct p2p_data *p2p) 2442{ 2443 struct p2p_device *dev, *prev; 2444 p2p_stop_find(p2p); 2445 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device, 2446 list) { 2447 dl_list_del(&dev->list); 2448 p2p_device_free(p2p, dev); 2449 } 2450 p2p_free_sd_queries(p2p); 2451 os_free(p2p->after_scan_tx); 2452 p2p->after_scan_tx = NULL; 2453} 2454 2455 2456int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr) 2457{ 2458 struct p2p_device *dev; 2459 2460 dev = p2p_get_device(p2p, addr); 2461 if (dev == NULL) 2462 return -1; 2463 2464 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr)); 2465 2466 if (p2p->go_neg_peer == dev) 2467 p2p->go_neg_peer = NULL; 2468 2469 dev->wps_method = WPS_NOT_READY; 2470 dev->oob_pw_id = 0; 2471 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 2472 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 2473 2474 /* Check if after_scan_tx is for this peer. If so free it */ 2475 if (p2p->after_scan_tx && 2476 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) { 2477 os_free(p2p->after_scan_tx); 2478 p2p->after_scan_tx = NULL; 2479 } 2480 2481 return 0; 2482} 2483 2484 2485int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name) 2486{ 2487 os_free(p2p->cfg->dev_name); 2488 if (dev_name) { 2489 p2p->cfg->dev_name = os_strdup(dev_name); 2490 if (p2p->cfg->dev_name == NULL) 2491 return -1; 2492 } else 2493 p2p->cfg->dev_name = NULL; 2494 return 0; 2495} 2496 2497 2498int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer) 2499{ 2500 os_free(p2p->cfg->manufacturer); 2501 p2p->cfg->manufacturer = NULL; 2502 if (manufacturer) { 2503 p2p->cfg->manufacturer = os_strdup(manufacturer); 2504 if (p2p->cfg->manufacturer == NULL) 2505 return -1; 2506 } 2507 2508 return 0; 2509} 2510 2511 2512int p2p_set_model_name(struct p2p_data *p2p, const char *model_name) 2513{ 2514 os_free(p2p->cfg->model_name); 2515 p2p->cfg->model_name = NULL; 2516 if (model_name) { 2517 p2p->cfg->model_name = os_strdup(model_name); 2518 if (p2p->cfg->model_name == NULL) 2519 return -1; 2520 } 2521 2522 return 0; 2523} 2524 2525 2526int p2p_set_model_number(struct p2p_data *p2p, const char *model_number) 2527{ 2528 os_free(p2p->cfg->model_number); 2529 p2p->cfg->model_number = NULL; 2530 if (model_number) { 2531 p2p->cfg->model_number = os_strdup(model_number); 2532 if (p2p->cfg->model_number == NULL) 2533 return -1; 2534 } 2535 2536 return 0; 2537} 2538 2539 2540int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number) 2541{ 2542 os_free(p2p->cfg->serial_number); 2543 p2p->cfg->serial_number = NULL; 2544 if (serial_number) { 2545 p2p->cfg->serial_number = os_strdup(serial_number); 2546 if (p2p->cfg->serial_number == NULL) 2547 return -1; 2548 } 2549 2550 return 0; 2551} 2552 2553 2554void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods) 2555{ 2556 p2p->cfg->config_methods = config_methods; 2557} 2558 2559 2560void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid) 2561{ 2562 os_memcpy(p2p->cfg->uuid, uuid, 16); 2563} 2564 2565 2566int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type) 2567{ 2568 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8); 2569 return 0; 2570} 2571 2572 2573int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8], 2574 size_t num_dev_types) 2575{ 2576 if (num_dev_types > P2P_SEC_DEVICE_TYPES) 2577 num_dev_types = P2P_SEC_DEVICE_TYPES; 2578 p2p->cfg->num_sec_dev_types = num_dev_types; 2579 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8); 2580 return 0; 2581} 2582 2583 2584void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p) 2585{ 2586 int i; 2587 2588 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2589 wpabuf_free(p2p->wps_vendor_ext[i]); 2590 p2p->wps_vendor_ext[i] = NULL; 2591 } 2592} 2593 2594 2595int p2p_add_wps_vendor_extension(struct p2p_data *p2p, 2596 const struct wpabuf *vendor_ext) 2597{ 2598 int i; 2599 2600 if (vendor_ext == NULL) 2601 return -1; 2602 2603 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2604 if (p2p->wps_vendor_ext[i] == NULL) 2605 break; 2606 } 2607 if (i >= P2P_MAX_WPS_VENDOR_EXT) 2608 return -1; 2609 2610 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext); 2611 if (p2p->wps_vendor_ext[i] == NULL) 2612 return -1; 2613 2614 return 0; 2615} 2616 2617 2618int p2p_set_country(struct p2p_data *p2p, const char *country) 2619{ 2620 os_memcpy(p2p->cfg->country, country, 3); 2621 return 0; 2622} 2623 2624 2625void p2p_continue_find(struct p2p_data *p2p) 2626{ 2627 struct p2p_device *dev; 2628 p2p_set_state(p2p, P2P_SEARCH); 2629 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2630 if (dev->flags & P2P_DEV_SD_SCHEDULE) { 2631 if (p2p_start_sd(p2p, dev) == 0) 2632 return; 2633 else 2634 break; 2635 } else if (dev->req_config_methods && 2636 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) { 2637 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 2638 MACSTR " (config methods 0x%x)", 2639 MAC2STR(dev->info.p2p_device_addr), 2640 dev->req_config_methods); 2641 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0) 2642 return; 2643 } 2644 } 2645 2646 p2p_listen_in_find(p2p, 1); 2647} 2648 2649 2650static void p2p_sd_cb(struct p2p_data *p2p, int success) 2651{ 2652 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d", 2653 success); 2654 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2655 2656 if (!success) { 2657 if (p2p->sd_peer) { 2658 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE; 2659 p2p->sd_peer = NULL; 2660 } 2661 p2p_continue_find(p2p); 2662 return; 2663 } 2664 2665 if (p2p->sd_peer == NULL) { 2666 p2p_dbg(p2p, "No SD peer entry known"); 2667 p2p_continue_find(p2p); 2668 return; 2669 } 2670 2671 /* Wait for response from the peer */ 2672 p2p_set_state(p2p, P2P_SD_DURING_FIND); 2673 p2p_set_timeout(p2p, 0, 200000); 2674} 2675 2676 2677/** 2678 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state 2679 * @p2p: P2P module context from p2p_init() 2680 */ 2681static void p2p_retry_pd(struct p2p_data *p2p) 2682{ 2683 struct p2p_device *dev; 2684 2685 if (p2p->state != P2P_IDLE) 2686 return; 2687 2688 /* 2689 * Retry the prov disc req attempt only for the peer that the user had 2690 * requested. 2691 */ 2692 2693 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2694 if (os_memcmp(p2p->pending_pd_devaddr, 2695 dev->info.p2p_device_addr, ETH_ALEN) != 0) 2696 continue; 2697 if (!dev->req_config_methods) 2698 continue; 2699 2700 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 2701 MACSTR " (config methods 0x%x)", 2702 MAC2STR(dev->info.p2p_device_addr), 2703 dev->req_config_methods); 2704 p2p_send_prov_disc_req(p2p, dev, 2705 dev->flags & P2P_DEV_PD_FOR_JOIN, 2706 p2p->pd_force_freq); 2707 return; 2708 } 2709} 2710 2711 2712static void p2p_prov_disc_cb(struct p2p_data *p2p, int success) 2713{ 2714 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d", 2715 success); 2716 2717 /* 2718 * Postpone resetting the pending action state till after we actually 2719 * time out. This allows us to take some action like notifying any 2720 * interested parties about no response to the request. 2721 * 2722 * When the timer (below) goes off we check in IDLE, SEARCH, or 2723 * LISTEN_ONLY state, which are the only allowed states to issue a PD 2724 * requests in, if this was still pending and then raise notification. 2725 */ 2726 2727 if (!success) { 2728 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2729 2730 if (p2p->user_initiated_pd && 2731 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY)) 2732 { 2733 /* Retry request from timeout to avoid busy loops */ 2734 p2p->pending_action_state = P2P_PENDING_PD; 2735 p2p_set_timeout(p2p, 0, 50000); 2736 } else if (p2p->state != P2P_IDLE) 2737 p2p_continue_find(p2p); 2738 else if (p2p->user_initiated_pd) { 2739 p2p->pending_action_state = P2P_PENDING_PD; 2740 p2p_set_timeout(p2p, 0, 300000); 2741 } 2742 return; 2743 } 2744 2745 /* 2746 * This postponing, of resetting pending_action_state, needs to be 2747 * done only for user initiated PD requests and not internal ones. 2748 */ 2749 if (p2p->user_initiated_pd) 2750 p2p->pending_action_state = P2P_PENDING_PD; 2751 else 2752 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2753 2754 /* Wait for response from the peer */ 2755 if (p2p->state == P2P_SEARCH) 2756 p2p_set_state(p2p, P2P_PD_DURING_FIND); 2757 p2p_set_timeout(p2p, 0, 200000); 2758} 2759 2760 2761int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq, 2762 struct os_reltime *rx_time, int level, const u8 *ies, 2763 size_t ies_len) 2764{ 2765 if (os_reltime_before(rx_time, &p2p->find_start)) { 2766 /* 2767 * The driver may have cached (e.g., in cfg80211 BSS table) the 2768 * scan results for relatively long time. To avoid reporting 2769 * stale information, update P2P peers only based on results 2770 * that have based on frames received after the last p2p_find 2771 * operation was started. 2772 */ 2773 p2p_dbg(p2p, "Ignore old scan result for " MACSTR 2774 " (rx_time=%u.%06u)", 2775 MAC2STR(bssid), (unsigned int) rx_time->sec, 2776 (unsigned int) rx_time->usec); 2777 return 0; 2778 } 2779 2780 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1); 2781 2782 return 0; 2783} 2784 2785 2786void p2p_scan_res_handled(struct p2p_data *p2p) 2787{ 2788 if (!p2p->p2p_scan_running) { 2789 p2p_dbg(p2p, "p2p_scan was not running, but scan results received"); 2790 } 2791 p2p->p2p_scan_running = 0; 2792 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2793 2794 if (p2p_run_after_scan(p2p)) 2795 return; 2796 if (p2p->state == P2P_SEARCH) 2797 p2p_continue_find(p2p); 2798} 2799 2800 2801void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id) 2802{ 2803 u8 *len; 2804 2805#ifdef CONFIG_WIFI_DISPLAY 2806 if (p2p->wfd_ie_probe_req) 2807 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req); 2808#endif /* CONFIG_WIFI_DISPLAY */ 2809 2810 len = p2p_buf_add_ie_hdr(ies); 2811 p2p_buf_add_capability(ies, p2p->dev_capab & 2812 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2813 if (dev_id) 2814 p2p_buf_add_device_id(ies, dev_id); 2815 if (p2p->cfg->reg_class && p2p->cfg->channel) 2816 p2p_buf_add_listen_channel(ies, p2p->cfg->country, 2817 p2p->cfg->reg_class, 2818 p2p->cfg->channel); 2819 if (p2p->ext_listen_interval) 2820 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period, 2821 p2p->ext_listen_interval); 2822 /* TODO: p2p_buf_add_operating_channel() if GO */ 2823 p2p_buf_update_ie_hdr(ies, len); 2824} 2825 2826 2827size_t p2p_scan_ie_buf_len(struct p2p_data *p2p) 2828{ 2829 size_t len = 100; 2830 2831#ifdef CONFIG_WIFI_DISPLAY 2832 if (p2p && p2p->wfd_ie_probe_req) 2833 len += wpabuf_len(p2p->wfd_ie_probe_req); 2834#endif /* CONFIG_WIFI_DISPLAY */ 2835 2836 return len; 2837} 2838 2839 2840int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end) 2841{ 2842 return p2p_attr_text(p2p_ie, buf, end); 2843} 2844 2845 2846static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success) 2847{ 2848 struct p2p_device *dev = p2p->go_neg_peer; 2849 int timeout; 2850 2851 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success); 2852 2853 if (dev == NULL) { 2854 p2p_dbg(p2p, "No pending GO Negotiation"); 2855 return; 2856 } 2857 2858 if (success) { 2859 if (dev->flags & P2P_DEV_USER_REJECTED) { 2860 p2p_set_state(p2p, P2P_IDLE); 2861 return; 2862 } 2863 } else if (dev->go_neg_req_sent) { 2864 /* Cancel the increment from p2p_connect_send() on failure */ 2865 dev->go_neg_req_sent--; 2866 } 2867 2868 if (!success && 2869 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) && 2870 !is_zero_ether_addr(dev->member_in_go_dev)) { 2871 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO", 2872 MAC2STR(dev->info.p2p_device_addr)); 2873 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 2874 p2p_send_dev_disc_req(p2p, dev); 2875 return; 2876 } 2877 2878 /* 2879 * Use P2P find, if needed, to find the other device from its listen 2880 * channel. 2881 */ 2882 p2p_set_state(p2p, P2P_CONNECT); 2883 timeout = success ? 500000 : 100000; 2884 if (!success && p2p->go_neg_peer && 2885 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) { 2886 unsigned int r; 2887 /* 2888 * Peer is expected to wait our response and we will skip the 2889 * listen phase. Add some randomness to the wait time here to 2890 * make it less likely to hit cases where we could end up in 2891 * sync with peer not listening. 2892 */ 2893 os_get_random((u8 *) &r, sizeof(r)); 2894 timeout += r % 100000; 2895 } 2896 p2p_set_timeout(p2p, 0, timeout); 2897} 2898 2899 2900static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success) 2901{ 2902 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d", 2903 success); 2904 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) { 2905 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore"); 2906 return; 2907 } 2908 p2p_set_state(p2p, P2P_CONNECT); 2909 p2p_set_timeout(p2p, 0, 500000); 2910} 2911 2912 2913static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success, 2914 const u8 *addr) 2915{ 2916 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success); 2917 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) { 2918 p2p_go_neg_failed(p2p, p2p->go_neg_peer, 2919 p2p->go_neg_peer->status); 2920 } else if (success) { 2921 struct p2p_device *dev; 2922 dev = p2p_get_device(p2p, addr); 2923 if (dev && 2924 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) 2925 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE; 2926 } 2927} 2928 2929 2930static void p2p_go_neg_conf_cb(struct p2p_data *p2p, 2931 enum p2p_send_action_result result) 2932{ 2933 struct p2p_device *dev; 2934 2935 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result); 2936 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 2937 if (result == P2P_SEND_ACTION_FAILED) { 2938 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 2939 return; 2940 } 2941 if (result == P2P_SEND_ACTION_NO_ACK) { 2942 /* 2943 * It looks like the TX status for GO Negotiation Confirm is 2944 * often showing failure even when the peer has actually 2945 * received the frame. Since the peer may change channels 2946 * immediately after having received the frame, we may not see 2947 * an Ack for retries, so just dropping a single frame may 2948 * trigger this. To allow the group formation to succeed if the 2949 * peer did indeed receive the frame, continue regardless of 2950 * the TX status. 2951 */ 2952 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported"); 2953 } 2954 2955 dev = p2p->go_neg_peer; 2956 if (dev == NULL) 2957 return; 2958 2959 p2p_go_complete(p2p, dev); 2960} 2961 2962 2963void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 2964 const u8 *src, const u8 *bssid, 2965 enum p2p_send_action_result result) 2966{ 2967 enum p2p_pending_action_state state; 2968 int success; 2969 2970 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR 2971 " src=" MACSTR " bssid=" MACSTR " result=%d", 2972 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), 2973 MAC2STR(bssid), result); 2974 success = result == P2P_SEND_ACTION_SUCCESS; 2975 state = p2p->pending_action_state; 2976 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2977 switch (state) { 2978 case P2P_NO_PENDING_ACTION: 2979 if (p2p->after_scan_tx_in_progress) { 2980 p2p->after_scan_tx_in_progress = 0; 2981 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING && 2982 p2p_run_after_scan(p2p)) 2983 break; 2984 if (p2p->state == P2P_SEARCH) { 2985 p2p_dbg(p2p, "Continue find after after_scan_tx completion"); 2986 p2p_continue_find(p2p); 2987 } 2988 } 2989 break; 2990 case P2P_PENDING_GO_NEG_REQUEST: 2991 p2p_go_neg_req_cb(p2p, success); 2992 break; 2993 case P2P_PENDING_GO_NEG_RESPONSE: 2994 p2p_go_neg_resp_cb(p2p, success); 2995 break; 2996 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE: 2997 p2p_go_neg_resp_failure_cb(p2p, success, dst); 2998 break; 2999 case P2P_PENDING_GO_NEG_CONFIRM: 3000 p2p_go_neg_conf_cb(p2p, result); 3001 break; 3002 case P2P_PENDING_SD: 3003 p2p_sd_cb(p2p, success); 3004 break; 3005 case P2P_PENDING_PD: 3006 p2p_prov_disc_cb(p2p, success); 3007 break; 3008 case P2P_PENDING_INVITATION_REQUEST: 3009 p2p_invitation_req_cb(p2p, success); 3010 break; 3011 case P2P_PENDING_INVITATION_RESPONSE: 3012 p2p_invitation_resp_cb(p2p, success); 3013 break; 3014 case P2P_PENDING_DEV_DISC_REQUEST: 3015 p2p_dev_disc_req_cb(p2p, success); 3016 break; 3017 case P2P_PENDING_DEV_DISC_RESPONSE: 3018 p2p_dev_disc_resp_cb(p2p, success); 3019 break; 3020 case P2P_PENDING_GO_DISC_REQ: 3021 p2p_go_disc_req_cb(p2p, success); 3022 break; 3023 } 3024 3025 p2p->after_scan_tx_in_progress = 0; 3026} 3027 3028 3029void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq, 3030 unsigned int duration) 3031{ 3032 if (freq == p2p->pending_client_disc_freq) { 3033 p2p_dbg(p2p, "Client discoverability remain-awake completed"); 3034 p2p->pending_client_disc_freq = 0; 3035 return; 3036 } 3037 3038 if (freq != p2p->pending_listen_freq) { 3039 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)", 3040 freq, duration, p2p->pending_listen_freq); 3041 return; 3042 } 3043 3044 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback", 3045 p2p->pending_listen_sec, p2p->pending_listen_usec, 3046 p2p->pending_listen_freq); 3047 p2p->in_listen = 1; 3048 p2p->drv_in_listen = freq; 3049 if (p2p->pending_listen_sec || p2p->pending_listen_usec) { 3050 /* 3051 * Add 20 msec extra wait to avoid race condition with driver 3052 * remain-on-channel end event, i.e., give driver more time to 3053 * complete the operation before our timeout expires. 3054 */ 3055 p2p_set_timeout(p2p, p2p->pending_listen_sec, 3056 p2p->pending_listen_usec + 20000); 3057 } 3058 3059 p2p->pending_listen_freq = 0; 3060} 3061 3062 3063int p2p_listen_end(struct p2p_data *p2p, unsigned int freq) 3064{ 3065 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq); 3066 p2p->drv_in_listen = 0; 3067 if (p2p->in_listen) 3068 return 0; /* Internal timeout will trigger the next step */ 3069 3070 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) { 3071 if (p2p->go_neg_peer->connect_reqs >= 120) { 3072 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3073 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3074 return 0; 3075 } 3076 3077 p2p_set_state(p2p, P2P_CONNECT); 3078 p2p_connect_send(p2p, p2p->go_neg_peer); 3079 return 1; 3080 } else if (p2p->state == P2P_SEARCH) { 3081 if (p2p->p2p_scan_running) { 3082 /* 3083 * Search is already in progress. This can happen if 3084 * an Action frame RX is reported immediately after 3085 * the end of a remain-on-channel operation and the 3086 * response frame to that is sent using an offchannel 3087 * operation while in p2p_find. Avoid an attempt to 3088 * restart a scan here. 3089 */ 3090 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one"); 3091 return 1; 3092 } 3093 if (p2p->pending_listen_freq) { 3094 /* 3095 * Better wait a bit if the driver is unable to start 3096 * offchannel operation for some reason. p2p_search() 3097 * will be started from internal timeout. 3098 */ 3099 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop"); 3100 p2p_set_timeout(p2p, 0, 100000); 3101 return 1; 3102 } 3103 if (p2p->search_delay) { 3104 p2p_dbg(p2p, "Delay search operation by %u ms", 3105 p2p->search_delay); 3106 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3107 (p2p->search_delay % 1000) * 1000); 3108 return 1; 3109 } 3110 p2p_search(p2p); 3111 return 1; 3112 } 3113 3114 return 0; 3115} 3116 3117 3118static void p2p_timeout_connect(struct p2p_data *p2p) 3119{ 3120 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3121 if (p2p->go_neg_peer && 3122 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 3123 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed"); 3124 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3125 return; 3126 } 3127 if (p2p->go_neg_peer && 3128 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) && 3129 p2p->go_neg_peer->connect_reqs < 120) { 3130 p2p_dbg(p2p, "Peer expected to wait our response - skip listen"); 3131 p2p_connect_send(p2p, p2p->go_neg_peer); 3132 return; 3133 } 3134 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) { 3135 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)"); 3136 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3137 p2p_set_timeout(p2p, 0, 30000); 3138 return; 3139 } 3140 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3141 p2p_listen_in_find(p2p, 0); 3142} 3143 3144 3145static void p2p_timeout_connect_listen(struct p2p_data *p2p) 3146{ 3147 if (p2p->go_neg_peer) { 3148 if (p2p->drv_in_listen) { 3149 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete"); 3150 return; 3151 } 3152 3153 if (p2p->go_neg_peer->connect_reqs >= 120) { 3154 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3155 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3156 return; 3157 } 3158 3159 p2p_set_state(p2p, P2P_CONNECT); 3160 p2p_connect_send(p2p, p2p->go_neg_peer); 3161 } else 3162 p2p_set_state(p2p, P2P_IDLE); 3163} 3164 3165 3166static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p) 3167{ 3168 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 3169 3170 if (p2p->cfg->is_concurrent_session_active && 3171 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx)) 3172 p2p_set_timeout(p2p, 0, 500000); 3173 else 3174 p2p_set_timeout(p2p, 0, 200000); 3175} 3176 3177 3178static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p) 3179{ 3180 struct p2p_device *dev = p2p->go_neg_peer; 3181 3182 if (dev == NULL) { 3183 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait"); 3184 return; 3185 } 3186 3187 dev->wait_count++; 3188 if (dev->wait_count >= 120) { 3189 p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation"); 3190 p2p_go_neg_failed(p2p, dev, -1); 3191 return; 3192 } 3193 3194 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation"); 3195 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT); 3196 p2p_listen_in_find(p2p, 0); 3197} 3198 3199 3200static void p2p_timeout_sd_during_find(struct p2p_data *p2p) 3201{ 3202 p2p_dbg(p2p, "Service Discovery Query timeout"); 3203 if (p2p->sd_peer) { 3204 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3205 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE; 3206 p2p->sd_peer = NULL; 3207 } 3208 p2p_continue_find(p2p); 3209} 3210 3211 3212static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p) 3213{ 3214 p2p_dbg(p2p, "Provision Discovery Request timeout"); 3215 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3216 p2p_continue_find(p2p); 3217} 3218 3219 3220static void p2p_timeout_prov_disc_req(struct p2p_data *p2p) 3221{ 3222 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3223 3224 /* 3225 * For user initiated PD requests that we have not gotten any responses 3226 * for while in IDLE state, we retry them a couple of times before 3227 * giving up. 3228 */ 3229 if (!p2p->user_initiated_pd) 3230 return; 3231 3232 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout"); 3233 3234 if (p2p->pd_retries) { 3235 p2p->pd_retries--; 3236 p2p_retry_pd(p2p); 3237 } else { 3238 struct p2p_device *dev; 3239 int for_join = 0; 3240 3241 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3242 if (os_memcmp(p2p->pending_pd_devaddr, 3243 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3244 continue; 3245 if (dev->req_config_methods && 3246 (dev->flags & P2P_DEV_PD_FOR_JOIN)) 3247 for_join = 1; 3248 } 3249 3250 if (p2p->cfg->prov_disc_fail) 3251 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, 3252 p2p->pending_pd_devaddr, 3253 for_join ? 3254 P2P_PROV_DISC_TIMEOUT_JOIN : 3255 P2P_PROV_DISC_TIMEOUT); 3256 p2p_reset_pending_pd(p2p); 3257 } 3258} 3259 3260 3261static void p2p_timeout_invite(struct p2p_data *p2p) 3262{ 3263 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3264 p2p_set_state(p2p, P2P_INVITE_LISTEN); 3265 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 3266 /* 3267 * Better remain on operating channel instead of listen channel 3268 * when running a group. 3269 */ 3270 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel"); 3271 p2p_set_timeout(p2p, 0, 100000); 3272 return; 3273 } 3274 p2p_listen_in_find(p2p, 0); 3275} 3276 3277 3278static void p2p_timeout_invite_listen(struct p2p_data *p2p) 3279{ 3280 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) { 3281 p2p_set_state(p2p, P2P_INVITE); 3282 p2p_invite_send(p2p, p2p->invite_peer, 3283 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id); 3284 } else { 3285 if (p2p->invite_peer) { 3286 p2p_dbg(p2p, "Invitation Request retry limit reached"); 3287 if (p2p->cfg->invitation_result) 3288 p2p->cfg->invitation_result( 3289 p2p->cfg->cb_ctx, -1, NULL, NULL, 3290 p2p->invite_peer->info.p2p_device_addr, 3291 0); 3292 } 3293 p2p_set_state(p2p, P2P_IDLE); 3294 } 3295} 3296 3297 3298static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx) 3299{ 3300 struct p2p_data *p2p = eloop_ctx; 3301 3302 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state)); 3303 3304 p2p->in_listen = 0; 3305 3306 switch (p2p->state) { 3307 case P2P_IDLE: 3308 /* Check if we timed out waiting for PD req */ 3309 if (p2p->pending_action_state == P2P_PENDING_PD) 3310 p2p_timeout_prov_disc_req(p2p); 3311 break; 3312 case P2P_SEARCH: 3313 /* Check if we timed out waiting for PD req */ 3314 if (p2p->pending_action_state == P2P_PENDING_PD) 3315 p2p_timeout_prov_disc_req(p2p); 3316 if (p2p->search_delay && !p2p->in_search_delay) { 3317 p2p_dbg(p2p, "Delay search operation by %u ms", 3318 p2p->search_delay); 3319 p2p->in_search_delay = 1; 3320 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3321 (p2p->search_delay % 1000) * 1000); 3322 break; 3323 } 3324 p2p->in_search_delay = 0; 3325 p2p_search(p2p); 3326 break; 3327 case P2P_CONNECT: 3328 p2p_timeout_connect(p2p); 3329 break; 3330 case P2P_CONNECT_LISTEN: 3331 p2p_timeout_connect_listen(p2p); 3332 break; 3333 case P2P_GO_NEG: 3334 break; 3335 case P2P_LISTEN_ONLY: 3336 /* Check if we timed out waiting for PD req */ 3337 if (p2p->pending_action_state == P2P_PENDING_PD) 3338 p2p_timeout_prov_disc_req(p2p); 3339 3340 if (p2p->ext_listen_only) { 3341 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed"); 3342 p2p->ext_listen_only = 0; 3343 p2p_set_state(p2p, P2P_IDLE); 3344 } 3345 break; 3346 case P2P_WAIT_PEER_CONNECT: 3347 p2p_timeout_wait_peer_connect(p2p); 3348 break; 3349 case P2P_WAIT_PEER_IDLE: 3350 p2p_timeout_wait_peer_idle(p2p); 3351 break; 3352 case P2P_SD_DURING_FIND: 3353 p2p_timeout_sd_during_find(p2p); 3354 break; 3355 case P2P_PROVISIONING: 3356 break; 3357 case P2P_PD_DURING_FIND: 3358 p2p_timeout_prov_disc_during_find(p2p); 3359 break; 3360 case P2P_INVITE: 3361 p2p_timeout_invite(p2p); 3362 break; 3363 case P2P_INVITE_LISTEN: 3364 p2p_timeout_invite_listen(p2p); 3365 break; 3366 } 3367} 3368 3369 3370int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr) 3371{ 3372 struct p2p_device *dev; 3373 3374 dev = p2p_get_device(p2p, peer_addr); 3375 p2p_dbg(p2p, "Local request to reject connection attempts by peer " 3376 MACSTR, MAC2STR(peer_addr)); 3377 if (dev == NULL) { 3378 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr)); 3379 return -1; 3380 } 3381 dev->status = P2P_SC_FAIL_REJECTED_BY_USER; 3382 dev->flags |= P2P_DEV_USER_REJECTED; 3383 return 0; 3384} 3385 3386 3387const char * p2p_wps_method_text(enum p2p_wps_method method) 3388{ 3389 switch (method) { 3390 case WPS_NOT_READY: 3391 return "not-ready"; 3392 case WPS_PIN_DISPLAY: 3393 return "Display"; 3394 case WPS_PIN_KEYPAD: 3395 return "Keypad"; 3396 case WPS_PBC: 3397 return "PBC"; 3398 case WPS_NFC: 3399 return "NFC"; 3400 } 3401 3402 return "??"; 3403} 3404 3405 3406static const char * p2p_go_state_text(enum p2p_go_state go_state) 3407{ 3408 switch (go_state) { 3409 case UNKNOWN_GO: 3410 return "unknown"; 3411 case LOCAL_GO: 3412 return "local"; 3413 case REMOTE_GO: 3414 return "remote"; 3415 } 3416 3417 return "??"; 3418} 3419 3420 3421const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p, 3422 const u8 *addr, int next) 3423{ 3424 struct p2p_device *dev; 3425 3426 if (addr) 3427 dev = p2p_get_device(p2p, addr); 3428 else 3429 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 3430 3431 if (dev && next) { 3432 dev = dl_list_first(&dev->list, struct p2p_device, list); 3433 if (&dev->list == &p2p->devices) 3434 dev = NULL; 3435 } 3436 3437 if (dev == NULL) 3438 return NULL; 3439 3440 return &dev->info; 3441} 3442 3443 3444int p2p_get_peer_info_txt(const struct p2p_peer_info *info, 3445 char *buf, size_t buflen) 3446{ 3447 struct p2p_device *dev; 3448 int res; 3449 char *pos, *end; 3450 struct os_reltime now; 3451 3452 if (info == NULL) 3453 return -1; 3454 3455 dev = (struct p2p_device *) (((u8 *) info) - 3456 offsetof(struct p2p_device, info)); 3457 3458 pos = buf; 3459 end = buf + buflen; 3460 3461 os_get_reltime(&now); 3462 res = os_snprintf(pos, end - pos, 3463 "age=%d\n" 3464 "listen_freq=%d\n" 3465 "wps_method=%s\n" 3466 "interface_addr=" MACSTR "\n" 3467 "member_in_go_dev=" MACSTR "\n" 3468 "member_in_go_iface=" MACSTR "\n" 3469 "go_neg_req_sent=%d\n" 3470 "go_state=%s\n" 3471 "dialog_token=%u\n" 3472 "intended_addr=" MACSTR "\n" 3473 "country=%c%c\n" 3474 "oper_freq=%d\n" 3475 "req_config_methods=0x%x\n" 3476 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n" 3477 "status=%d\n" 3478 "wait_count=%u\n" 3479 "invitation_reqs=%u\n", 3480 (int) (now.sec - dev->last_seen.sec), 3481 dev->listen_freq, 3482 p2p_wps_method_text(dev->wps_method), 3483 MAC2STR(dev->interface_addr), 3484 MAC2STR(dev->member_in_go_dev), 3485 MAC2STR(dev->member_in_go_iface), 3486 dev->go_neg_req_sent, 3487 p2p_go_state_text(dev->go_state), 3488 dev->dialog_token, 3489 MAC2STR(dev->intended_addr), 3490 dev->country[0] ? dev->country[0] : '_', 3491 dev->country[1] ? dev->country[1] : '_', 3492 dev->oper_freq, 3493 dev->req_config_methods, 3494 dev->flags & P2P_DEV_PROBE_REQ_ONLY ? 3495 "[PROBE_REQ_ONLY]" : "", 3496 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "", 3497 dev->flags & P2P_DEV_NOT_YET_READY ? 3498 "[NOT_YET_READY]" : "", 3499 dev->flags & P2P_DEV_SD_INFO ? "[SD_INFO]" : "", 3500 dev->flags & P2P_DEV_SD_SCHEDULE ? "[SD_SCHEDULE]" : 3501 "", 3502 dev->flags & P2P_DEV_PD_PEER_DISPLAY ? 3503 "[PD_PEER_DISPLAY]" : "", 3504 dev->flags & P2P_DEV_PD_PEER_KEYPAD ? 3505 "[PD_PEER_KEYPAD]" : "", 3506 dev->flags & P2P_DEV_USER_REJECTED ? 3507 "[USER_REJECTED]" : "", 3508 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ? 3509 "[PEER_WAITING_RESPONSE]" : "", 3510 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ? 3511 "[PREFER_PERSISTENT_GROUP]" : "", 3512 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ? 3513 "[WAIT_GO_NEG_RESPONSE]" : "", 3514 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ? 3515 "[WAIT_GO_NEG_CONFIRM]" : "", 3516 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ? 3517 "[GROUP_CLIENT_ONLY]" : "", 3518 dev->flags & P2P_DEV_FORCE_FREQ ? 3519 "[FORCE_FREQ]" : "", 3520 dev->flags & P2P_DEV_PD_FOR_JOIN ? 3521 "[PD_FOR_JOIN]" : "", 3522 dev->status, 3523 dev->wait_count, 3524 dev->invitation_reqs); 3525 if (res < 0 || res >= end - pos) 3526 return pos - buf; 3527 pos += res; 3528 3529 if (dev->ext_listen_period) { 3530 res = os_snprintf(pos, end - pos, 3531 "ext_listen_period=%u\n" 3532 "ext_listen_interval=%u\n", 3533 dev->ext_listen_period, 3534 dev->ext_listen_interval); 3535 if (res < 0 || res >= end - pos) 3536 return pos - buf; 3537 pos += res; 3538 } 3539 3540 if (dev->oper_ssid_len) { 3541 res = os_snprintf(pos, end - pos, 3542 "oper_ssid=%s\n", 3543 wpa_ssid_txt(dev->oper_ssid, 3544 dev->oper_ssid_len)); 3545 if (res < 0 || res >= end - pos) 3546 return pos - buf; 3547 pos += res; 3548 } 3549 3550#ifdef CONFIG_WIFI_DISPLAY 3551 if (dev->info.wfd_subelems) { 3552 res = os_snprintf(pos, end - pos, "wfd_subelems="); 3553 if (res < 0 || res >= end - pos) 3554 return pos - buf; 3555 pos += res; 3556 3557 pos += wpa_snprintf_hex(pos, end - pos, 3558 wpabuf_head(dev->info.wfd_subelems), 3559 wpabuf_len(dev->info.wfd_subelems)); 3560 3561 res = os_snprintf(pos, end - pos, "\n"); 3562 if (res < 0 || res >= end - pos) 3563 return pos - buf; 3564 pos += res; 3565 } 3566#endif /* CONFIG_WIFI_DISPLAY */ 3567 3568 return pos - buf; 3569} 3570 3571 3572int p2p_peer_known(struct p2p_data *p2p, const u8 *addr) 3573{ 3574 return p2p_get_device(p2p, addr) != NULL; 3575} 3576 3577 3578void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled) 3579{ 3580 if (enabled) { 3581 p2p_dbg(p2p, "Client discoverability enabled"); 3582 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3583 } else { 3584 p2p_dbg(p2p, "Client discoverability disabled"); 3585 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3586 } 3587} 3588 3589 3590static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1, 3591 u32 duration2, u32 interval2) 3592{ 3593 struct wpabuf *req; 3594 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL; 3595 u8 *len; 3596 3597 req = wpabuf_alloc(100); 3598 if (req == NULL) 3599 return NULL; 3600 3601 if (duration1 || interval1) { 3602 os_memset(&desc1, 0, sizeof(desc1)); 3603 desc1.count_type = 1; 3604 desc1.duration = duration1; 3605 desc1.interval = interval1; 3606 ptr1 = &desc1; 3607 3608 if (duration2 || interval2) { 3609 os_memset(&desc2, 0, sizeof(desc2)); 3610 desc2.count_type = 2; 3611 desc2.duration = duration2; 3612 desc2.interval = interval2; 3613 ptr2 = &desc2; 3614 } 3615 } 3616 3617 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1); 3618 len = p2p_buf_add_ie_hdr(req); 3619 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2); 3620 p2p_buf_update_ie_hdr(req, len); 3621 3622 return req; 3623} 3624 3625 3626int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr, 3627 const u8 *own_interface_addr, unsigned int freq, 3628 u32 duration1, u32 interval1, u32 duration2, 3629 u32 interval2) 3630{ 3631 struct wpabuf *req; 3632 3633 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR 3634 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u " 3635 "dur2=%u int2=%u", 3636 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr), 3637 freq, duration1, interval1, duration2, interval2); 3638 3639 req = p2p_build_presence_req(duration1, interval1, duration2, 3640 interval2); 3641 if (req == NULL) 3642 return -1; 3643 3644 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3645 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr, 3646 go_interface_addr, 3647 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 3648 p2p_dbg(p2p, "Failed to send Action frame"); 3649 } 3650 wpabuf_free(req); 3651 3652 return 0; 3653} 3654 3655 3656static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa, 3657 size_t noa_len, u8 dialog_token) 3658{ 3659 struct wpabuf *resp; 3660 u8 *len; 3661 3662 resp = wpabuf_alloc(100 + noa_len); 3663 if (resp == NULL) 3664 return NULL; 3665 3666 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token); 3667 len = p2p_buf_add_ie_hdr(resp); 3668 p2p_buf_add_status(resp, status); 3669 if (noa) { 3670 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE); 3671 wpabuf_put_le16(resp, noa_len); 3672 wpabuf_put_data(resp, noa, noa_len); 3673 } else 3674 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL); 3675 p2p_buf_update_ie_hdr(resp, len); 3676 3677 return resp; 3678} 3679 3680 3681static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 3682 const u8 *sa, const u8 *data, size_t len, 3683 int rx_freq) 3684{ 3685 struct p2p_message msg; 3686 u8 status; 3687 struct wpabuf *resp; 3688 size_t g; 3689 struct p2p_group *group = NULL; 3690 int parsed = 0; 3691 u8 noa[50]; 3692 int noa_len; 3693 3694 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request"); 3695 3696 for (g = 0; g < p2p->num_groups; g++) { 3697 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]), 3698 ETH_ALEN) == 0) { 3699 group = p2p->groups[g]; 3700 break; 3701 } 3702 } 3703 if (group == NULL) { 3704 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group " 3705 MACSTR, MAC2STR(da)); 3706 return; 3707 } 3708 3709 if (p2p_parse(data, len, &msg) < 0) { 3710 p2p_dbg(p2p, "Failed to parse P2P Presence Request"); 3711 status = P2P_SC_FAIL_INVALID_PARAMS; 3712 goto fail; 3713 } 3714 parsed = 1; 3715 3716 if (msg.noa == NULL) { 3717 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request"); 3718 status = P2P_SC_FAIL_INVALID_PARAMS; 3719 goto fail; 3720 } 3721 3722 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len); 3723 3724fail: 3725 if (p2p->cfg->get_noa) 3726 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa, 3727 sizeof(noa)); 3728 else 3729 noa_len = -1; 3730 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL, 3731 noa_len > 0 ? noa_len : 0, 3732 msg.dialog_token); 3733 if (parsed) 3734 p2p_parse_free(&msg); 3735 if (resp == NULL) 3736 return; 3737 3738 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3739 if (p2p_send_action(p2p, rx_freq, sa, da, da, 3740 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 3741 p2p_dbg(p2p, "Failed to send Action frame"); 3742 } 3743 wpabuf_free(resp); 3744} 3745 3746 3747static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 3748 const u8 *sa, const u8 *data, size_t len) 3749{ 3750 struct p2p_message msg; 3751 3752 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response"); 3753 3754 if (p2p_parse(data, len, &msg) < 0) { 3755 p2p_dbg(p2p, "Failed to parse P2P Presence Response"); 3756 return; 3757 } 3758 3759 if (msg.status == NULL || msg.noa == NULL) { 3760 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response"); 3761 p2p_parse_free(&msg); 3762 return; 3763 } 3764 3765 if (p2p->cfg->presence_resp) { 3766 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status, 3767 msg.noa, msg.noa_len); 3768 } 3769 3770 if (*msg.status) { 3771 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u", 3772 *msg.status); 3773 p2p_parse_free(&msg); 3774 return; 3775 } 3776 3777 p2p_dbg(p2p, "P2P Presence Request was accepted"); 3778 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA", 3779 msg.noa, msg.noa_len); 3780 /* TODO: process NoA */ 3781 p2p_parse_free(&msg); 3782} 3783 3784 3785static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx) 3786{ 3787 struct p2p_data *p2p = eloop_ctx; 3788 3789 if (p2p->ext_listen_interval) { 3790 /* Schedule next extended listen timeout */ 3791 eloop_register_timeout(p2p->ext_listen_interval_sec, 3792 p2p->ext_listen_interval_usec, 3793 p2p_ext_listen_timeout, p2p, NULL); 3794 } 3795 3796 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) { 3797 /* 3798 * This should not really happen, but it looks like the Listen 3799 * command may fail is something else (e.g., a scan) was 3800 * running at an inconvenient time. As a workaround, allow new 3801 * Extended Listen operation to be started. 3802 */ 3803 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again"); 3804 p2p->ext_listen_only = 0; 3805 p2p_set_state(p2p, P2P_IDLE); 3806 } 3807 3808 if (p2p->state != P2P_IDLE) { 3809 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state)); 3810 return; 3811 } 3812 3813 p2p_dbg(p2p, "Extended Listen timeout"); 3814 p2p->ext_listen_only = 1; 3815 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) { 3816 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing"); 3817 p2p->ext_listen_only = 0; 3818 } 3819} 3820 3821 3822int p2p_ext_listen(struct p2p_data *p2p, unsigned int period, 3823 unsigned int interval) 3824{ 3825 if (period > 65535 || interval > 65535 || period > interval || 3826 (period == 0 && interval > 0) || (period > 0 && interval == 0)) { 3827 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u", 3828 period, interval); 3829 return -1; 3830 } 3831 3832 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 3833 3834 if (interval == 0) { 3835 p2p_dbg(p2p, "Disabling Extended Listen Timing"); 3836 p2p->ext_listen_period = 0; 3837 p2p->ext_listen_interval = 0; 3838 return 0; 3839 } 3840 3841 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec", 3842 period, interval); 3843 p2p->ext_listen_period = period; 3844 p2p->ext_listen_interval = interval; 3845 p2p->ext_listen_interval_sec = interval / 1000; 3846 p2p->ext_listen_interval_usec = (interval % 1000) * 1000; 3847 3848 eloop_register_timeout(p2p->ext_listen_interval_sec, 3849 p2p->ext_listen_interval_usec, 3850 p2p_ext_listen_timeout, p2p, NULL); 3851 3852 return 0; 3853} 3854 3855 3856void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 3857 const u8 *ie, size_t ie_len) 3858{ 3859 struct p2p_message msg; 3860 3861 if (bssid == NULL || ie == NULL) 3862 return; 3863 3864 os_memset(&msg, 0, sizeof(msg)); 3865 if (p2p_parse_ies(ie, ie_len, &msg)) 3866 return; 3867 if (msg.minor_reason_code == NULL) { 3868 p2p_parse_free(&msg); 3869 return; 3870 } 3871 3872 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR 3873 " reason_code=%u minor_reason_code=%u", 3874 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 3875 3876 p2p_parse_free(&msg); 3877} 3878 3879 3880void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 3881 const u8 *ie, size_t ie_len) 3882{ 3883 struct p2p_message msg; 3884 3885 if (bssid == NULL || ie == NULL) 3886 return; 3887 3888 os_memset(&msg, 0, sizeof(msg)); 3889 if (p2p_parse_ies(ie, ie_len, &msg)) 3890 return; 3891 if (msg.minor_reason_code == NULL) { 3892 p2p_parse_free(&msg); 3893 return; 3894 } 3895 3896 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR 3897 " reason_code=%u minor_reason_code=%u", 3898 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 3899 3900 p2p_parse_free(&msg); 3901} 3902 3903 3904void p2p_set_managed_oper(struct p2p_data *p2p, int enabled) 3905{ 3906 if (enabled) { 3907 p2p_dbg(p2p, "Managed P2P Device operations enabled"); 3908 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED; 3909 } else { 3910 p2p_dbg(p2p, "Managed P2P Device operations disabled"); 3911 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED; 3912 } 3913} 3914 3915 3916int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel) 3917{ 3918 if (p2p_channel_to_freq(reg_class, channel) < 0) 3919 return -1; 3920 3921 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u", 3922 reg_class, channel); 3923 p2p->cfg->reg_class = reg_class; 3924 p2p->cfg->channel = channel; 3925 3926 return 0; 3927} 3928 3929 3930int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len) 3931{ 3932 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len)); 3933 if (postfix == NULL) { 3934 p2p->cfg->ssid_postfix_len = 0; 3935 return 0; 3936 } 3937 if (len > sizeof(p2p->cfg->ssid_postfix)) 3938 return -1; 3939 os_memcpy(p2p->cfg->ssid_postfix, postfix, len); 3940 p2p->cfg->ssid_postfix_len = len; 3941 return 0; 3942} 3943 3944 3945int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel, 3946 int cfg_op_channel) 3947{ 3948 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0) 3949 return -1; 3950 3951 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u", 3952 op_reg_class, op_channel); 3953 p2p->cfg->op_reg_class = op_reg_class; 3954 p2p->cfg->op_channel = op_channel; 3955 p2p->cfg->cfg_op_channel = cfg_op_channel; 3956 return 0; 3957} 3958 3959 3960int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan, 3961 const struct p2p_channel *pref_chan) 3962{ 3963 struct p2p_channel *n; 3964 3965 if (pref_chan) { 3966 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel)); 3967 if (n == NULL) 3968 return -1; 3969 os_memcpy(n, pref_chan, 3970 num_pref_chan * sizeof(struct p2p_channel)); 3971 } else 3972 n = NULL; 3973 3974 os_free(p2p->cfg->pref_chan); 3975 p2p->cfg->pref_chan = n; 3976 p2p->cfg->num_pref_chan = num_pref_chan; 3977 3978 return 0; 3979} 3980 3981 3982int p2p_set_no_go_freq(struct p2p_data *p2p, 3983 const struct wpa_freq_range_list *list) 3984{ 3985 struct wpa_freq_range *tmp; 3986 3987 if (list == NULL || list->num == 0) { 3988 os_free(p2p->no_go_freq.range); 3989 p2p->no_go_freq.range = NULL; 3990 p2p->no_go_freq.num = 0; 3991 return 0; 3992 } 3993 3994 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range)); 3995 if (tmp == NULL) 3996 return -1; 3997 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range)); 3998 os_free(p2p->no_go_freq.range); 3999 p2p->no_go_freq.range = tmp; 4000 p2p->no_go_freq.num = list->num; 4001 p2p_dbg(p2p, "Updated no GO chan list"); 4002 4003 return 0; 4004} 4005 4006 4007int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr, 4008 u8 *iface_addr) 4009{ 4010 struct p2p_device *dev = p2p_get_device(p2p, dev_addr); 4011 if (dev == NULL || is_zero_ether_addr(dev->interface_addr)) 4012 return -1; 4013 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN); 4014 return 0; 4015} 4016 4017 4018int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr, 4019 u8 *dev_addr) 4020{ 4021 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4022 if (dev == NULL) 4023 return -1; 4024 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN); 4025 return 0; 4026} 4027 4028 4029void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr) 4030{ 4031 os_memcpy(p2p->peer_filter, addr, ETH_ALEN); 4032 if (is_zero_ether_addr(p2p->peer_filter)) 4033 p2p_dbg(p2p, "Disable peer filter"); 4034 else 4035 p2p_dbg(p2p, "Enable peer filter for " MACSTR, 4036 MAC2STR(p2p->peer_filter)); 4037} 4038 4039 4040void p2p_set_cross_connect(struct p2p_data *p2p, int enabled) 4041{ 4042 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled"); 4043 if (p2p->cross_connect == enabled) 4044 return; 4045 p2p->cross_connect = enabled; 4046 /* TODO: may need to tear down any action group where we are GO(?) */ 4047} 4048 4049 4050int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr) 4051{ 4052 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4053 if (dev == NULL) 4054 return -1; 4055 if (dev->oper_freq <= 0) 4056 return -1; 4057 return dev->oper_freq; 4058} 4059 4060 4061void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled) 4062{ 4063 p2p_dbg(p2p, "Intra BSS distribution %s", 4064 enabled ? "enabled" : "disabled"); 4065 p2p->cfg->p2p_intra_bss = enabled; 4066} 4067 4068 4069void p2p_update_channel_list(struct p2p_data *p2p, 4070 const struct p2p_channels *chan, 4071 const struct p2p_channels *cli_chan) 4072{ 4073 p2p_dbg(p2p, "Update channel list"); 4074 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels)); 4075 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 4076 os_memcpy(&p2p->cfg->cli_channels, cli_chan, 4077 sizeof(struct p2p_channels)); 4078 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 4079} 4080 4081 4082int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 4083 const u8 *src, const u8 *bssid, const u8 *buf, 4084 size_t len, unsigned int wait_time) 4085{ 4086 if (p2p->p2p_scan_running) { 4087 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes"); 4088 if (p2p->after_scan_tx) { 4089 p2p_dbg(p2p, "Dropped previous pending Action frame TX"); 4090 os_free(p2p->after_scan_tx); 4091 } 4092 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) + 4093 len); 4094 if (p2p->after_scan_tx == NULL) 4095 return -1; 4096 p2p->after_scan_tx->freq = freq; 4097 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN); 4098 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN); 4099 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN); 4100 p2p->after_scan_tx->len = len; 4101 p2p->after_scan_tx->wait_time = wait_time; 4102 os_memcpy(p2p->after_scan_tx + 1, buf, len); 4103 return 0; 4104 } 4105 4106 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid, 4107 buf, len, wait_time); 4108} 4109 4110 4111void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5, 4112 int freq_overall) 4113{ 4114 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d", 4115 freq_24, freq_5, freq_overall); 4116 p2p->best_freq_24 = freq_24; 4117 p2p->best_freq_5 = freq_5; 4118 p2p->best_freq_overall = freq_overall; 4119} 4120 4121 4122void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq) 4123{ 4124 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq); 4125 p2p->own_freq_preference = freq; 4126} 4127 4128 4129const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p) 4130{ 4131 if (p2p == NULL || p2p->go_neg_peer == NULL) 4132 return NULL; 4133 return p2p->go_neg_peer->info.p2p_device_addr; 4134} 4135 4136 4137const struct p2p_peer_info * 4138p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next) 4139{ 4140 struct p2p_device *dev; 4141 4142 if (addr) { 4143 dev = p2p_get_device(p2p, addr); 4144 if (!dev) 4145 return NULL; 4146 4147 if (!next) { 4148 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 4149 return NULL; 4150 4151 return &dev->info; 4152 } else { 4153 do { 4154 dev = dl_list_first(&dev->list, 4155 struct p2p_device, 4156 list); 4157 if (&dev->list == &p2p->devices) 4158 return NULL; 4159 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY); 4160 } 4161 } else { 4162 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4163 if (!dev) 4164 return NULL; 4165 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 4166 dev = dl_list_first(&dev->list, 4167 struct p2p_device, 4168 list); 4169 if (&dev->list == &p2p->devices) 4170 return NULL; 4171 } 4172 } 4173 4174 return &dev->info; 4175} 4176 4177 4178int p2p_in_progress(struct p2p_data *p2p) 4179{ 4180 if (p2p == NULL) 4181 return 0; 4182 if (p2p->state == P2P_SEARCH) 4183 return 2; 4184 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING; 4185} 4186 4187 4188void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout, 4189 u8 client_timeout) 4190{ 4191 if (p2p) { 4192 p2p->go_timeout = go_timeout; 4193 p2p->client_timeout = client_timeout; 4194 } 4195} 4196 4197 4198#ifdef CONFIG_WIFI_DISPLAY 4199 4200static void p2p_update_wfd_ie_groups(struct p2p_data *p2p) 4201{ 4202 size_t g; 4203 struct p2p_group *group; 4204 4205 for (g = 0; g < p2p->num_groups; g++) { 4206 group = p2p->groups[g]; 4207 p2p_group_force_beacon_update_ies(group); 4208 } 4209} 4210 4211 4212int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie) 4213{ 4214 wpabuf_free(p2p->wfd_ie_beacon); 4215 p2p->wfd_ie_beacon = ie; 4216 p2p_update_wfd_ie_groups(p2p); 4217 return 0; 4218} 4219 4220 4221int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie) 4222{ 4223 wpabuf_free(p2p->wfd_ie_probe_req); 4224 p2p->wfd_ie_probe_req = ie; 4225 return 0; 4226} 4227 4228 4229int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie) 4230{ 4231 wpabuf_free(p2p->wfd_ie_probe_resp); 4232 p2p->wfd_ie_probe_resp = ie; 4233 p2p_update_wfd_ie_groups(p2p); 4234 return 0; 4235} 4236 4237 4238int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie) 4239{ 4240 wpabuf_free(p2p->wfd_ie_assoc_req); 4241 p2p->wfd_ie_assoc_req = ie; 4242 return 0; 4243} 4244 4245 4246int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie) 4247{ 4248 wpabuf_free(p2p->wfd_ie_invitation); 4249 p2p->wfd_ie_invitation = ie; 4250 return 0; 4251} 4252 4253 4254int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie) 4255{ 4256 wpabuf_free(p2p->wfd_ie_prov_disc_req); 4257 p2p->wfd_ie_prov_disc_req = ie; 4258 return 0; 4259} 4260 4261 4262int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie) 4263{ 4264 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 4265 p2p->wfd_ie_prov_disc_resp = ie; 4266 return 0; 4267} 4268 4269 4270int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie) 4271{ 4272 wpabuf_free(p2p->wfd_ie_go_neg); 4273 p2p->wfd_ie_go_neg = ie; 4274 return 0; 4275} 4276 4277 4278int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem) 4279{ 4280 wpabuf_free(p2p->wfd_dev_info); 4281 if (elem) { 4282 p2p->wfd_dev_info = wpabuf_dup(elem); 4283 if (p2p->wfd_dev_info == NULL) 4284 return -1; 4285 } else 4286 p2p->wfd_dev_info = NULL; 4287 4288 return 0; 4289} 4290 4291 4292int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem) 4293{ 4294 wpabuf_free(p2p->wfd_assoc_bssid); 4295 if (elem) { 4296 p2p->wfd_assoc_bssid = wpabuf_dup(elem); 4297 if (p2p->wfd_assoc_bssid == NULL) 4298 return -1; 4299 } else 4300 p2p->wfd_assoc_bssid = NULL; 4301 4302 return 0; 4303} 4304 4305 4306int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p, 4307 const struct wpabuf *elem) 4308{ 4309 wpabuf_free(p2p->wfd_coupled_sink_info); 4310 if (elem) { 4311 p2p->wfd_coupled_sink_info = wpabuf_dup(elem); 4312 if (p2p->wfd_coupled_sink_info == NULL) 4313 return -1; 4314 } else 4315 p2p->wfd_coupled_sink_info = NULL; 4316 4317 return 0; 4318} 4319 4320#endif /* CONFIG_WIFI_DISPLAY */ 4321 4322 4323int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int, 4324 int max_disc_tu) 4325{ 4326 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0) 4327 return -1; 4328 4329 p2p->min_disc_int = min_disc_int; 4330 p2p->max_disc_int = max_disc_int; 4331 p2p->max_disc_tu = max_disc_tu; 4332 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d", 4333 min_disc_int, max_disc_int, max_disc_tu); 4334 4335 return 0; 4336} 4337 4338 4339void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...) 4340{ 4341 va_list ap; 4342 char buf[500]; 4343 4344 if (!p2p->cfg->debug_print) 4345 return; 4346 4347 va_start(ap, fmt); 4348 vsnprintf(buf, sizeof(buf), fmt, ap); 4349 buf[sizeof(buf) - 1] = '\0'; 4350 va_end(ap); 4351 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf); 4352} 4353 4354 4355void p2p_info(struct p2p_data *p2p, const char *fmt, ...) 4356{ 4357 va_list ap; 4358 char buf[500]; 4359 4360 if (!p2p->cfg->debug_print) 4361 return; 4362 4363 va_start(ap, fmt); 4364 vsnprintf(buf, sizeof(buf), fmt, ap); 4365 buf[sizeof(buf) - 1] = '\0'; 4366 va_end(ap); 4367 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf); 4368} 4369 4370 4371void p2p_err(struct p2p_data *p2p, const char *fmt, ...) 4372{ 4373 va_list ap; 4374 char buf[500]; 4375 4376 if (!p2p->cfg->debug_print) 4377 return; 4378 4379 va_start(ap, fmt); 4380 vsnprintf(buf, sizeof(buf), fmt, ap); 4381 buf[sizeof(buf) - 1] = '\0'; 4382 va_end(ap); 4383 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf); 4384} 4385 4386 4387#ifdef CONFIG_WPS_NFC 4388 4389static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p, 4390 int client_freq, 4391 const u8 *go_dev_addr, 4392 const u8 *ssid, size_t ssid_len) 4393{ 4394 struct wpabuf *buf; 4395 u8 op_class, channel; 4396 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP; 4397 4398 buf = wpabuf_alloc(1000); 4399 if (buf == NULL) 4400 return NULL; 4401 4402 op_class = p2p->cfg->reg_class; 4403 channel = p2p->cfg->channel; 4404 4405 p2p_buf_add_capability(buf, p2p->dev_capab & 4406 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 4407 p2p_buf_add_device_info(buf, p2p, NULL); 4408 4409 if (p2p->num_groups > 0) { 4410 role = P2P_GO_IN_A_GROUP; 4411 p2p_freq_to_channel(p2p_group_get_freq(p2p->groups[0]), 4412 &op_class, &channel); 4413 } else if (client_freq > 0) { 4414 role = P2P_CLIENT_IN_A_GROUP; 4415 p2p_freq_to_channel(client_freq, &op_class, &channel); 4416 } 4417 4418 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class, 4419 channel, role); 4420 4421 if (p2p->num_groups > 0) { 4422 /* Limit number of clients to avoid very long message */ 4423 p2p_buf_add_group_info(p2p->groups[0], buf, 5); 4424 p2p_group_buf_add_id(p2p->groups[0], buf); 4425 } else if (client_freq > 0 && 4426 go_dev_addr && !is_zero_ether_addr(go_dev_addr) && 4427 ssid && ssid_len > 0) { 4428 /* 4429 * Add the optional P2P Group ID to indicate in which group this 4430 * device is a P2P Client. 4431 */ 4432 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len); 4433 } 4434 4435 return buf; 4436} 4437 4438 4439struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p, 4440 int client_freq, 4441 const u8 *go_dev_addr, 4442 const u8 *ssid, size_t ssid_len) 4443{ 4444 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 4445 ssid_len); 4446} 4447 4448 4449struct wpabuf * p2p_build_nfc_handover_sel(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 4459int p2p_process_nfc_connection_handover(struct p2p_data *p2p, 4460 struct p2p_nfc_params *params) 4461{ 4462 struct p2p_message msg; 4463 struct p2p_device *dev; 4464 const u8 *p2p_dev_addr; 4465 int freq; 4466 enum p2p_role_indication role; 4467 4468 params->next_step = NO_ACTION; 4469 4470 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len, 4471 params->p2p_attr, params->p2p_len, &msg)) { 4472 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC"); 4473 p2p_parse_free(&msg); 4474 return -1; 4475 } 4476 4477 if (msg.p2p_device_addr) 4478 p2p_dev_addr = msg.p2p_device_addr; 4479 else if (msg.device_id) 4480 p2p_dev_addr = msg.device_id; 4481 else { 4482 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 4483 p2p_parse_free(&msg); 4484 return -1; 4485 } 4486 4487 if (msg.oob_dev_password) { 4488 os_memcpy(params->oob_dev_pw, msg.oob_dev_password, 4489 msg.oob_dev_password_len); 4490 params->oob_dev_pw_len = msg.oob_dev_password_len; 4491 } 4492 4493 dev = p2p_create_device(p2p, p2p_dev_addr); 4494 if (dev == NULL) { 4495 p2p_parse_free(&msg); 4496 return -1; 4497 } 4498 4499 params->peer = &dev->info; 4500 4501 os_get_reltime(&dev->last_seen); 4502 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 4503 p2p_copy_wps_info(p2p, dev, 0, &msg); 4504 4505 if (!msg.oob_go_neg_channel) { 4506 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included"); 4507 return -1; 4508 } 4509 4510 if (msg.oob_go_neg_channel[3] == 0 && 4511 msg.oob_go_neg_channel[4] == 0) 4512 freq = 0; 4513 else 4514 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3], 4515 msg.oob_go_neg_channel[4]); 4516 if (freq < 0) { 4517 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel"); 4518 return -1; 4519 } 4520 role = msg.oob_go_neg_channel[5]; 4521 4522 if (role == P2P_GO_IN_A_GROUP) { 4523 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq); 4524 params->go_freq = freq; 4525 } else if (role == P2P_CLIENT_IN_A_GROUP) { 4526 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz", 4527 freq); 4528 params->go_freq = freq; 4529 } else 4530 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq); 4531 dev->oob_go_neg_freq = freq; 4532 4533 if (!params->sel && role != P2P_GO_IN_A_GROUP) { 4534 freq = p2p_channel_to_freq(p2p->cfg->reg_class, 4535 p2p->cfg->channel); 4536 if (freq < 0) { 4537 p2p_dbg(p2p, "Own listen channel not known"); 4538 return -1; 4539 } 4540 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq); 4541 dev->oob_go_neg_freq = freq; 4542 } 4543 4544 if (msg.group_id) { 4545 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN); 4546 params->go_ssid_len = msg.group_id_len - ETH_ALEN; 4547 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN, 4548 params->go_ssid_len); 4549 } 4550 4551 p2p_parse_free(&msg); 4552 4553 if (dev->flags & P2P_DEV_USER_REJECTED) { 4554 p2p_dbg(p2p, "Do not report rejected device"); 4555 return 0; 4556 } 4557 4558 if (!(dev->flags & P2P_DEV_REPORTED)) { 4559 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info, 4560 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 4561 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 4562 } 4563 4564 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0) 4565 params->next_step = BOTH_GO; 4566 else if (role == P2P_GO_IN_A_GROUP) 4567 params->next_step = JOIN_GROUP; 4568 else if (role == P2P_CLIENT_IN_A_GROUP) { 4569 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 4570 params->next_step = PEER_CLIENT; 4571 } else if (p2p->num_groups > 0) 4572 params->next_step = AUTH_JOIN; 4573 else if (params->sel) 4574 params->next_step = INIT_GO_NEG; 4575 else 4576 params->next_step = RESP_GO_NEG; 4577 4578 return 0; 4579} 4580 4581 4582void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id, 4583 int go_intent, 4584 const u8 *own_interface_addr) 4585{ 4586 4587 p2p->authorized_oob_dev_pw_id = dev_pw_id; 4588 if (dev_pw_id == 0) { 4589 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover"); 4590 return; 4591 } 4592 4593 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover", 4594 dev_pw_id); 4595 4596 p2p->go_intent = go_intent; 4597 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 4598} 4599 4600#endif /* CONFIG_WPS_NFC */ 4601