p2p.c revision 2271d3fdd5982d0e5e81cf9999a861bba933eacb
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 if (new_state == P2P_IDLE && p2p->pending_channel) { 188 p2p_dbg(p2p, "Apply change in listen channel"); 189 p2p->cfg->reg_class = p2p->pending_reg_class; 190 p2p->cfg->channel = p2p->pending_channel; 191 p2p->pending_reg_class = 0; 192 p2p->pending_channel = 0; 193 } 194} 195 196 197void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec) 198{ 199 p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec", 200 p2p_state_txt(p2p->state), sec, usec); 201 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 202 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL); 203} 204 205 206void p2p_clear_timeout(struct p2p_data *p2p) 207{ 208 p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state)); 209 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 210} 211 212 213void p2p_go_neg_failed(struct p2p_data *p2p, struct p2p_device *peer, 214 int status) 215{ 216 struct p2p_go_neg_results res; 217 p2p_clear_timeout(p2p); 218 p2p_set_state(p2p, P2P_IDLE); 219 if (p2p->go_neg_peer) { 220 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 221 p2p->go_neg_peer->wps_method = WPS_NOT_READY; 222 p2p->go_neg_peer->oob_pw_id = 0; 223 } 224 p2p->go_neg_peer = NULL; 225 226 os_memset(&res, 0, sizeof(res)); 227 res.status = status; 228 if (peer) { 229 wpabuf_free(peer->go_neg_conf); 230 peer->go_neg_conf = NULL; 231 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, 232 ETH_ALEN); 233 os_memcpy(res.peer_interface_addr, peer->intended_addr, 234 ETH_ALEN); 235 } 236 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 237} 238 239 240static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc) 241{ 242 unsigned int r, tu; 243 int freq; 244 struct wpabuf *ies; 245 246 p2p_dbg(p2p, "Starting short listen state (state=%s)", 247 p2p_state_txt(p2p->state)); 248 249 if (p2p->pending_listen_freq) { 250 /* We have a pending p2p_listen request */ 251 p2p_dbg(p2p, "p2p_listen command pending already"); 252 return; 253 } 254 255 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 256 if (freq < 0) { 257 p2p_dbg(p2p, "Unknown regulatory class/channel"); 258 return; 259 } 260 261 os_get_random((u8 *) &r, sizeof(r)); 262 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) + 263 p2p->min_disc_int) * 100; 264 if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu) 265 tu = p2p->max_disc_tu; 266 if (!dev_disc && tu < 100) 267 tu = 100; /* Need to wait in non-device discovery use cases */ 268 if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen) 269 tu = p2p->cfg->max_listen * 1000 / 1024; 270 271 if (tu == 0) { 272 p2p_dbg(p2p, "Skip listen state since duration was 0 TU"); 273 p2p_set_timeout(p2p, 0, 0); 274 return; 275 } 276 277 ies = p2p_build_probe_resp_ies(p2p); 278 if (ies == NULL) 279 return; 280 281 p2p->pending_listen_freq = freq; 282 p2p->pending_listen_sec = 0; 283 p2p->pending_listen_usec = 1024 * tu; 284 285 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000, 286 ies) < 0) { 287 p2p_dbg(p2p, "Failed to start listen mode"); 288 p2p->pending_listen_freq = 0; 289 } 290 wpabuf_free(ies); 291} 292 293 294int p2p_listen(struct p2p_data *p2p, unsigned int timeout) 295{ 296 int freq; 297 struct wpabuf *ies; 298 299 p2p_dbg(p2p, "Going to listen(only) state"); 300 301 if (p2p->pending_listen_freq) { 302 /* We have a pending p2p_listen request */ 303 p2p_dbg(p2p, "p2p_listen command pending already"); 304 return -1; 305 } 306 307 freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel); 308 if (freq < 0) { 309 p2p_dbg(p2p, "Unknown regulatory class/channel"); 310 return -1; 311 } 312 313 p2p->pending_listen_sec = timeout / 1000; 314 p2p->pending_listen_usec = (timeout % 1000) * 1000; 315 316 if (p2p->p2p_scan_running) { 317 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) { 318 p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen"); 319 return 0; 320 } 321 p2p_dbg(p2p, "p2p_scan running - delay start of listen state"); 322 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN; 323 return 0; 324 } 325 326 ies = p2p_build_probe_resp_ies(p2p); 327 if (ies == NULL) 328 return -1; 329 330 p2p->pending_listen_freq = freq; 331 332 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) { 333 p2p_dbg(p2p, "Failed to start listen mode"); 334 p2p->pending_listen_freq = 0; 335 wpabuf_free(ies); 336 return -1; 337 } 338 wpabuf_free(ies); 339 340 p2p_set_state(p2p, P2P_LISTEN_ONLY); 341 342 return 0; 343} 344 345 346static void p2p_device_clear_reported(struct p2p_data *p2p) 347{ 348 struct p2p_device *dev; 349 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) 350 dev->flags &= ~P2P_DEV_REPORTED; 351} 352 353 354/** 355 * p2p_get_device - Fetch a peer entry 356 * @p2p: P2P module context from p2p_init() 357 * @addr: P2P Device Address of the peer 358 * Returns: Pointer to the device entry or %NULL if not found 359 */ 360struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr) 361{ 362 struct p2p_device *dev; 363 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 364 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0) 365 return dev; 366 } 367 return NULL; 368} 369 370 371/** 372 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address 373 * @p2p: P2P module context from p2p_init() 374 * @addr: P2P Interface Address of the peer 375 * Returns: Pointer to the device entry or %NULL if not found 376 */ 377struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p, 378 const u8 *addr) 379{ 380 struct p2p_device *dev; 381 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 382 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0) 383 return dev; 384 } 385 return NULL; 386} 387 388 389/** 390 * p2p_create_device - Create a peer entry 391 * @p2p: P2P module context from p2p_init() 392 * @addr: P2P Device Address of the peer 393 * Returns: Pointer to the device entry or %NULL on failure 394 * 395 * If there is already an entry for the peer, it will be returned instead of 396 * creating a new one. 397 */ 398static struct p2p_device * p2p_create_device(struct p2p_data *p2p, 399 const u8 *addr) 400{ 401 struct p2p_device *dev, *oldest = NULL; 402 size_t count = 0; 403 404 dev = p2p_get_device(p2p, addr); 405 if (dev) 406 return dev; 407 408 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 409 count++; 410 if (oldest == NULL || 411 os_reltime_before(&dev->last_seen, &oldest->last_seen)) 412 oldest = dev; 413 } 414 if (count + 1 > p2p->cfg->max_peers && oldest) { 415 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer"); 416 dl_list_del(&oldest->list); 417 p2p_device_free(p2p, oldest); 418 } 419 420 dev = os_zalloc(sizeof(*dev)); 421 if (dev == NULL) 422 return NULL; 423 dl_list_add(&p2p->devices, &dev->list); 424 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN); 425 426 return dev; 427} 428 429 430static void p2p_copy_client_info(struct p2p_device *dev, 431 struct p2p_client_info *cli) 432{ 433 os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len); 434 dev->info.device_name[cli->dev_name_len] = '\0'; 435 dev->info.dev_capab = cli->dev_capab; 436 dev->info.config_methods = cli->config_methods; 437 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8); 438 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types; 439 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types, 440 dev->info.wps_sec_dev_type_list_len); 441} 442 443 444static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr, 445 const u8 *go_interface_addr, int freq, 446 const u8 *gi, size_t gi_len) 447{ 448 struct p2p_group_info info; 449 size_t c; 450 struct p2p_device *dev; 451 452 if (gi == NULL) 453 return 0; 454 455 if (p2p_group_info_parse(gi, gi_len, &info) < 0) 456 return -1; 457 458 /* 459 * Clear old data for this group; if the devices are still in the 460 * group, the information will be restored in the loop following this. 461 */ 462 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 463 if (os_memcmp(dev->member_in_go_iface, go_interface_addr, 464 ETH_ALEN) == 0) { 465 os_memset(dev->member_in_go_iface, 0, ETH_ALEN); 466 os_memset(dev->member_in_go_dev, 0, ETH_ALEN); 467 } 468 } 469 470 for (c = 0; c < info.num_clients; c++) { 471 struct p2p_client_info *cli = &info.client[c]; 472 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr, 473 ETH_ALEN) == 0) 474 continue; /* ignore our own entry */ 475 dev = p2p_get_device(p2p, cli->p2p_device_addr); 476 if (dev) { 477 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY | 478 P2P_DEV_PROBE_REQ_ONLY)) { 479 /* 480 * Update information since we have not 481 * received this directly from the client. 482 */ 483 p2p_copy_client_info(dev, cli); 484 } else { 485 /* 486 * Need to update P2P Client Discoverability 487 * flag since it is valid only in P2P Group 488 * Info attribute. 489 */ 490 dev->info.dev_capab &= 491 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 492 dev->info.dev_capab |= 493 cli->dev_capab & 494 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 495 } 496 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 497 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 498 } 499 } else { 500 dev = p2p_create_device(p2p, cli->p2p_device_addr); 501 if (dev == NULL) 502 continue; 503 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 504 p2p_copy_client_info(dev, cli); 505 dev->oper_freq = freq; 506 p2p->cfg->dev_found(p2p->cfg->cb_ctx, 507 dev->info.p2p_device_addr, 508 &dev->info, 1); 509 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 510 } 511 512 os_memcpy(dev->interface_addr, cli->p2p_interface_addr, 513 ETH_ALEN); 514 os_get_reltime(&dev->last_seen); 515 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN); 516 os_memcpy(dev->member_in_go_iface, go_interface_addr, 517 ETH_ALEN); 518 } 519 520 return 0; 521} 522 523 524static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev, 525 int probe_req, const struct p2p_message *msg) 526{ 527 os_memcpy(dev->info.device_name, msg->device_name, 528 sizeof(dev->info.device_name)); 529 530 if (msg->manufacturer && 531 msg->manufacturer_len < sizeof(dev->info.manufacturer)) { 532 os_memset(dev->info.manufacturer, 0, 533 sizeof(dev->info.manufacturer)); 534 os_memcpy(dev->info.manufacturer, msg->manufacturer, 535 msg->manufacturer_len); 536 } 537 538 if (msg->model_name && 539 msg->model_name_len < sizeof(dev->info.model_name)) { 540 os_memset(dev->info.model_name, 0, 541 sizeof(dev->info.model_name)); 542 os_memcpy(dev->info.model_name, msg->model_name, 543 msg->model_name_len); 544 } 545 546 if (msg->model_number && 547 msg->model_number_len < sizeof(dev->info.model_number)) { 548 os_memset(dev->info.model_number, 0, 549 sizeof(dev->info.model_number)); 550 os_memcpy(dev->info.model_number, msg->model_number, 551 msg->model_number_len); 552 } 553 554 if (msg->serial_number && 555 msg->serial_number_len < sizeof(dev->info.serial_number)) { 556 os_memset(dev->info.serial_number, 0, 557 sizeof(dev->info.serial_number)); 558 os_memcpy(dev->info.serial_number, msg->serial_number, 559 msg->serial_number_len); 560 } 561 562 if (msg->pri_dev_type) 563 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type, 564 sizeof(dev->info.pri_dev_type)); 565 else if (msg->wps_pri_dev_type) 566 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type, 567 sizeof(dev->info.pri_dev_type)); 568 569 if (msg->wps_sec_dev_type_list) { 570 os_memcpy(dev->info.wps_sec_dev_type_list, 571 msg->wps_sec_dev_type_list, 572 msg->wps_sec_dev_type_list_len); 573 dev->info.wps_sec_dev_type_list_len = 574 msg->wps_sec_dev_type_list_len; 575 } 576 577 if (msg->capability) { 578 /* 579 * P2P Client Discoverability bit is reserved in all frames 580 * that use this function, so do not change its value here. 581 */ 582 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 583 dev->info.dev_capab |= msg->capability[0] & 584 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 585 dev->info.group_capab = msg->capability[1]; 586 } 587 588 if (msg->ext_listen_timing) { 589 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing); 590 dev->ext_listen_interval = 591 WPA_GET_LE16(msg->ext_listen_timing + 2); 592 } 593 594 if (!probe_req) { 595 u16 new_config_methods; 596 new_config_methods = msg->config_methods ? 597 msg->config_methods : msg->wps_config_methods; 598 if (new_config_methods && 599 dev->info.config_methods != new_config_methods) { 600 p2p_dbg(p2p, "Update peer " MACSTR 601 " config_methods 0x%x -> 0x%x", 602 MAC2STR(dev->info.p2p_device_addr), 603 dev->info.config_methods, 604 new_config_methods); 605 dev->info.config_methods = new_config_methods; 606 } 607 } 608} 609 610 611/** 612 * p2p_add_device - Add peer entries based on scan results or P2P frames 613 * @p2p: P2P module context from p2p_init() 614 * @addr: Source address of Beacon or Probe Response frame (may be either 615 * P2P Device Address or P2P Interface Address) 616 * @level: Signal level (signal strength of the received frame from the peer) 617 * @freq: Frequency on which the Beacon or Probe Response frame was received 618 * @rx_time: Time when the result was received 619 * @ies: IEs from the Beacon or Probe Response frame 620 * @ies_len: Length of ies buffer in octets 621 * @scan_res: Whether this was based on scan results 622 * Returns: 0 on success, -1 on failure 623 * 624 * If the scan result is for a GO, the clients in the group will also be added 625 * to the peer table. This function can also be used with some other frames 626 * like Provision Discovery Request that contains P2P Capability and P2P Device 627 * Info attributes. 628 */ 629int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq, 630 struct os_reltime *rx_time, int level, const u8 *ies, 631 size_t ies_len, int scan_res) 632{ 633 struct p2p_device *dev; 634 struct p2p_message msg; 635 const u8 *p2p_dev_addr; 636 int i; 637 struct os_reltime time_now; 638 639 os_memset(&msg, 0, sizeof(msg)); 640 if (p2p_parse_ies(ies, ies_len, &msg)) { 641 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry"); 642 p2p_parse_free(&msg); 643 return -1; 644 } 645 646 if (msg.p2p_device_addr) 647 p2p_dev_addr = msg.p2p_device_addr; 648 else if (msg.device_id) 649 p2p_dev_addr = msg.device_id; 650 else { 651 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 652 p2p_parse_free(&msg); 653 return -1; 654 } 655 656 if (!is_zero_ether_addr(p2p->peer_filter) && 657 os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) { 658 p2p_dbg(p2p, "Do not add peer filter for " MACSTR 659 " due to peer filter", MAC2STR(p2p_dev_addr)); 660 p2p_parse_free(&msg); 661 return 0; 662 } 663 664 dev = p2p_create_device(p2p, p2p_dev_addr); 665 if (dev == NULL) { 666 p2p_parse_free(&msg); 667 return -1; 668 } 669 670 if (rx_time == NULL) { 671 os_get_reltime(&time_now); 672 rx_time = &time_now; 673 } 674 675 /* 676 * Update the device entry only if the new peer 677 * entry is newer than the one previously stored. 678 */ 679 if (dev->last_seen.sec > 0 && 680 os_reltime_before(rx_time, &dev->last_seen)) { 681 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)", 682 (unsigned int) rx_time->sec, 683 (unsigned int) rx_time->usec, 684 (unsigned int) dev->last_seen.sec, 685 (unsigned int) dev->last_seen.usec); 686 p2p_parse_free(&msg); 687 return -1; 688 } 689 690 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime)); 691 692 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 693 694 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0) 695 os_memcpy(dev->interface_addr, addr, ETH_ALEN); 696 if (msg.ssid && 697 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 698 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 699 != 0)) { 700 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]); 701 dev->oper_ssid_len = msg.ssid[1]; 702 } 703 704 if (freq >= 2412 && freq <= 2484 && msg.ds_params && 705 *msg.ds_params >= 1 && *msg.ds_params <= 14) { 706 int ds_freq; 707 if (*msg.ds_params == 14) 708 ds_freq = 2484; 709 else 710 ds_freq = 2407 + *msg.ds_params * 5; 711 if (freq != ds_freq) { 712 p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz", 713 freq, ds_freq); 714 freq = ds_freq; 715 } 716 } 717 718 if (dev->listen_freq && dev->listen_freq != freq && scan_res) { 719 p2p_dbg(p2p, "Update Listen frequency based on scan results (" 720 MACSTR " %d -> %d MHz (DS param %d)", 721 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq, 722 freq, msg.ds_params ? *msg.ds_params : -1); 723 } 724 if (scan_res) { 725 dev->listen_freq = freq; 726 if (msg.group_info) 727 dev->oper_freq = freq; 728 } 729 dev->info.level = level; 730 731 p2p_copy_wps_info(p2p, dev, 0, &msg); 732 733 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 734 wpabuf_free(dev->info.wps_vendor_ext[i]); 735 dev->info.wps_vendor_ext[i] = NULL; 736 } 737 738 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 739 if (msg.wps_vendor_ext[i] == NULL) 740 break; 741 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy( 742 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]); 743 if (dev->info.wps_vendor_ext[i] == NULL) 744 break; 745 } 746 747 if (msg.wfd_subelems) { 748 wpabuf_free(dev->info.wfd_subelems); 749 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 750 } 751 752 if (scan_res) { 753 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq, 754 msg.group_info, msg.group_info_len); 755 } 756 757 p2p_parse_free(&msg); 758 759 if (dev->flags & P2P_DEV_REPORTED) 760 return 0; 761 762 p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)", 763 freq, (unsigned int) rx_time->sec, 764 (unsigned int) rx_time->usec); 765 if (dev->flags & P2P_DEV_USER_REJECTED) { 766 p2p_dbg(p2p, "Do not report rejected device"); 767 return 0; 768 } 769 770 if (dev->info.config_methods == 0 && 771 (freq == 2412 || freq == 2437 || freq == 2462)) { 772 /* 773 * If we have only seen a Beacon frame from a GO, we do not yet 774 * know what WPS config methods it supports. Since some 775 * applications use config_methods value from P2P-DEVICE-FOUND 776 * events, postpone reporting this peer until we've fully 777 * discovered its capabilities. 778 * 779 * At least for now, do this only if the peer was detected on 780 * one of the social channels since that peer can be easily be 781 * found again and there are no limitations of having to use 782 * passive scan on this channels, so this can be done through 783 * Probe Response frame that includes the config_methods 784 * information. 785 */ 786 p2p_dbg(p2p, "Do not report peer " MACSTR 787 " with unknown config methods", MAC2STR(addr)); 788 return 0; 789 } 790 791 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 792 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 793 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 794 795 return 0; 796} 797 798 799static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev) 800{ 801 int i; 802 803 if (p2p->go_neg_peer == dev) { 804 /* 805 * If GO Negotiation is in progress, report that it has failed. 806 */ 807 p2p_go_neg_failed(p2p, dev, -1); 808 p2p->go_neg_peer = NULL; 809 } 810 if (p2p->invite_peer == dev) 811 p2p->invite_peer = NULL; 812 if (p2p->sd_peer == dev) 813 p2p->sd_peer = NULL; 814 if (p2p->pending_client_disc_go == dev) 815 p2p->pending_client_disc_go = NULL; 816 817 /* dev_lost() device, but only if it was previously dev_found() */ 818 if (dev->flags & P2P_DEV_REPORTED_ONCE) 819 p2p->cfg->dev_lost(p2p->cfg->cb_ctx, 820 dev->info.p2p_device_addr); 821 822 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 823 wpabuf_free(dev->info.wps_vendor_ext[i]); 824 dev->info.wps_vendor_ext[i] = NULL; 825 } 826 827 wpabuf_free(dev->info.wfd_subelems); 828 wpabuf_free(dev->go_neg_conf); 829 830 os_free(dev); 831} 832 833 834static int p2p_get_next_prog_freq(struct p2p_data *p2p) 835{ 836 struct p2p_channels *c; 837 struct p2p_reg_class *cla; 838 size_t cl, ch; 839 int found = 0; 840 u8 reg_class; 841 u8 channel; 842 int freq; 843 844 c = &p2p->cfg->channels; 845 for (cl = 0; cl < c->reg_classes; cl++) { 846 cla = &c->reg_class[cl]; 847 if (cla->reg_class != p2p->last_prog_scan_class) 848 continue; 849 for (ch = 0; ch < cla->channels; ch++) { 850 if (cla->channel[ch] == p2p->last_prog_scan_chan) { 851 found = 1; 852 break; 853 } 854 } 855 if (found) 856 break; 857 } 858 859 if (!found) { 860 /* Start from beginning */ 861 reg_class = c->reg_class[0].reg_class; 862 channel = c->reg_class[0].channel[0]; 863 } else { 864 /* Pick the next channel */ 865 ch++; 866 if (ch == cla->channels) { 867 cl++; 868 if (cl == c->reg_classes) 869 cl = 0; 870 ch = 0; 871 } 872 reg_class = c->reg_class[cl].reg_class; 873 channel = c->reg_class[cl].channel[ch]; 874 } 875 876 freq = p2p_channel_to_freq(reg_class, channel); 877 p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz", 878 reg_class, channel, freq); 879 p2p->last_prog_scan_class = reg_class; 880 p2p->last_prog_scan_chan = channel; 881 882 if (freq == 2412 || freq == 2437 || freq == 2462) 883 return 0; /* No need to add social channels */ 884 return freq; 885} 886 887 888static void p2p_search(struct p2p_data *p2p) 889{ 890 int freq = 0; 891 enum p2p_scan_type type; 892 u16 pw_id = DEV_PW_DEFAULT; 893 int res; 894 895 if (p2p->drv_in_listen) { 896 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing"); 897 return; 898 } 899 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 900 901 if (p2p->find_type == P2P_FIND_PROGRESSIVE && 902 (freq = p2p_get_next_prog_freq(p2p)) > 0) { 903 type = P2P_SCAN_SOCIAL_PLUS_ONE; 904 p2p_dbg(p2p, "Starting search (+ freq %u)", freq); 905 } else { 906 type = P2P_SCAN_SOCIAL; 907 p2p_dbg(p2p, "Starting search"); 908 } 909 910 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq, 911 p2p->num_req_dev_types, p2p->req_dev_types, 912 p2p->find_dev_id, pw_id); 913 if (res < 0) { 914 p2p_dbg(p2p, "Scan request failed"); 915 p2p_continue_find(p2p); 916 } else { 917 p2p_dbg(p2p, "Running p2p_scan"); 918 p2p->p2p_scan_running = 1; 919 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 920 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 921 p2p, NULL); 922 } 923} 924 925 926static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx) 927{ 928 struct p2p_data *p2p = eloop_ctx; 929 p2p_dbg(p2p, "Find timeout -> stop"); 930 p2p_stop_find(p2p); 931} 932 933 934static int p2p_run_after_scan(struct p2p_data *p2p) 935{ 936 struct p2p_device *dev; 937 enum p2p_after_scan op; 938 939 if (p2p->after_scan_tx) { 940 p2p->after_scan_tx_in_progress = 1; 941 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion"); 942 p2p->cfg->send_action(p2p->cfg->cb_ctx, 943 p2p->after_scan_tx->freq, 944 p2p->after_scan_tx->dst, 945 p2p->after_scan_tx->src, 946 p2p->after_scan_tx->bssid, 947 (u8 *) (p2p->after_scan_tx + 1), 948 p2p->after_scan_tx->len, 949 p2p->after_scan_tx->wait_time); 950 os_free(p2p->after_scan_tx); 951 p2p->after_scan_tx = NULL; 952 return 1; 953 } 954 955 op = p2p->start_after_scan; 956 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 957 switch (op) { 958 case P2P_AFTER_SCAN_NOTHING: 959 break; 960 case P2P_AFTER_SCAN_LISTEN: 961 p2p_dbg(p2p, "Start previously requested Listen state"); 962 p2p_listen(p2p, p2p->pending_listen_sec * 1000 + 963 p2p->pending_listen_usec / 1000); 964 return 1; 965 case P2P_AFTER_SCAN_CONNECT: 966 p2p_dbg(p2p, "Start previously requested connect with " MACSTR, 967 MAC2STR(p2p->after_scan_peer)); 968 dev = p2p_get_device(p2p, p2p->after_scan_peer); 969 if (dev == NULL) { 970 p2p_dbg(p2p, "Peer not known anymore"); 971 break; 972 } 973 p2p_connect_send(p2p, dev); 974 return 1; 975 } 976 977 return 0; 978} 979 980 981static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx) 982{ 983 struct p2p_data *p2p = eloop_ctx; 984 int running; 985 p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running); 986 running = p2p->p2p_scan_running; 987 /* Make sure we recover from missed scan results callback */ 988 p2p->p2p_scan_running = 0; 989 990 if (running) 991 p2p_run_after_scan(p2p); 992} 993 994 995static void p2p_free_req_dev_types(struct p2p_data *p2p) 996{ 997 p2p->num_req_dev_types = 0; 998 os_free(p2p->req_dev_types); 999 p2p->req_dev_types = NULL; 1000} 1001 1002 1003int p2p_find(struct p2p_data *p2p, unsigned int timeout, 1004 enum p2p_discovery_type type, 1005 unsigned int num_req_dev_types, const u8 *req_dev_types, 1006 const u8 *dev_id, unsigned int search_delay) 1007{ 1008 int res; 1009 1010 p2p_dbg(p2p, "Starting find (type=%d)", type); 1011 os_get_reltime(&p2p->find_start); 1012 if (p2p->p2p_scan_running) { 1013 p2p_dbg(p2p, "p2p_scan is already running"); 1014 } 1015 1016 p2p_free_req_dev_types(p2p); 1017 if (req_dev_types && num_req_dev_types) { 1018 p2p->req_dev_types = os_malloc(num_req_dev_types * 1019 WPS_DEV_TYPE_LEN); 1020 if (p2p->req_dev_types == NULL) 1021 return -1; 1022 os_memcpy(p2p->req_dev_types, req_dev_types, 1023 num_req_dev_types * WPS_DEV_TYPE_LEN); 1024 p2p->num_req_dev_types = num_req_dev_types; 1025 } 1026 1027 if (dev_id) { 1028 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN); 1029 p2p->find_dev_id = p2p->find_dev_id_buf; 1030 } else 1031 p2p->find_dev_id = NULL; 1032 1033 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1034 p2p_clear_timeout(p2p); 1035 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1036 p2p->find_type = type; 1037 p2p_device_clear_reported(p2p); 1038 p2p_set_state(p2p, P2P_SEARCH); 1039 p2p->search_delay = search_delay; 1040 p2p->in_search_delay = 0; 1041 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1042 p2p->last_p2p_find_timeout = timeout; 1043 if (timeout) 1044 eloop_register_timeout(timeout, 0, p2p_find_timeout, 1045 p2p, NULL); 1046 switch (type) { 1047 case P2P_FIND_START_WITH_FULL: 1048 case P2P_FIND_PROGRESSIVE: 1049 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0, 1050 p2p->num_req_dev_types, 1051 p2p->req_dev_types, dev_id, 1052 DEV_PW_DEFAULT); 1053 break; 1054 case P2P_FIND_ONLY_SOCIAL: 1055 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0, 1056 p2p->num_req_dev_types, 1057 p2p->req_dev_types, dev_id, 1058 DEV_PW_DEFAULT); 1059 break; 1060 default: 1061 return -1; 1062 } 1063 1064 if (res == 0) { 1065 p2p_dbg(p2p, "Running p2p_scan"); 1066 p2p->p2p_scan_running = 1; 1067 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 1068 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 1069 p2p, NULL); 1070 } else if (p2p->p2p_scan_running) { 1071 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running"); 1072 /* wait for the previous p2p_scan to complete */ 1073 res = 0; /* do not report failure */ 1074 } else { 1075 p2p_dbg(p2p, "Failed to start p2p_scan"); 1076 p2p_set_state(p2p, P2P_IDLE); 1077 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1078 } 1079 1080 return res; 1081} 1082 1083 1084void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq) 1085{ 1086 p2p_dbg(p2p, "Stopping find"); 1087 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1088 p2p_clear_timeout(p2p); 1089 if (p2p->state == P2P_SEARCH) 1090 p2p->cfg->find_stopped(p2p->cfg->cb_ctx); 1091 p2p_set_state(p2p, P2P_IDLE); 1092 p2p_free_req_dev_types(p2p); 1093 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1094 if (p2p->go_neg_peer) 1095 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; 1096 p2p->go_neg_peer = NULL; 1097 p2p->sd_peer = NULL; 1098 p2p->invite_peer = NULL; 1099 p2p_stop_listen_for_freq(p2p, freq); 1100} 1101 1102 1103void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq) 1104{ 1105 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) { 1106 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response"); 1107 return; 1108 } 1109 if (p2p->in_listen) { 1110 p2p->in_listen = 0; 1111 p2p_clear_timeout(p2p); 1112 } 1113 if (p2p->drv_in_listen) { 1114 /* 1115 * The driver may not deliver callback to p2p_listen_end() 1116 * when the operation gets canceled, so clear the internal 1117 * variable that is tracking driver state. 1118 */ 1119 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen); 1120 p2p->drv_in_listen = 0; 1121 } 1122 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1123} 1124 1125 1126void p2p_stop_listen(struct p2p_data *p2p) 1127{ 1128 if (p2p->state != P2P_LISTEN_ONLY) { 1129 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state."); 1130 return; 1131 } 1132 1133 p2p_stop_listen_for_freq(p2p, 0); 1134 p2p_set_state(p2p, P2P_IDLE); 1135} 1136 1137 1138void p2p_stop_find(struct p2p_data *p2p) 1139{ 1140 p2p->pending_listen_freq = 0; 1141 p2p_stop_find_for_freq(p2p, 0); 1142} 1143 1144 1145static int p2p_prepare_channel_pref(struct p2p_data *p2p, 1146 unsigned int force_freq, 1147 unsigned int pref_freq, int go) 1148{ 1149 u8 op_class, op_channel; 1150 unsigned int freq = force_freq ? force_freq : pref_freq; 1151 1152 p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d", 1153 force_freq, pref_freq, go); 1154 if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) { 1155 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq); 1156 return -1; 1157 } 1158 1159 if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) && 1160 (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class, 1161 op_channel))) { 1162 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P", 1163 freq, op_class, op_channel); 1164 return -1; 1165 } 1166 1167 p2p->op_reg_class = op_class; 1168 p2p->op_channel = op_channel; 1169 1170 if (force_freq) { 1171 p2p->channels.reg_classes = 1; 1172 p2p->channels.reg_class[0].channels = 1; 1173 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 1174 p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 1175 } else { 1176 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1177 sizeof(struct p2p_channels)); 1178 } 1179 1180 return 0; 1181} 1182 1183 1184static void p2p_prepare_channel_best(struct p2p_data *p2p) 1185{ 1186 u8 op_class, op_channel; 1187 const int op_classes_5ghz[] = { 124, 115, 0 }; 1188 const int op_classes_ht40[] = { 126, 127, 116, 117, 0 }; 1189 const int op_classes_vht[] = { 128, 0 }; 1190 1191 p2p_dbg(p2p, "Prepare channel best"); 1192 1193 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 && 1194 p2p_supported_freq(p2p, p2p->best_freq_overall) && 1195 p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel) 1196 == 0) { 1197 p2p_dbg(p2p, "Select best overall channel as operating channel preference"); 1198 p2p->op_reg_class = op_class; 1199 p2p->op_channel = op_channel; 1200 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 && 1201 p2p_supported_freq(p2p, p2p->best_freq_5) && 1202 p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel) 1203 == 0) { 1204 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference"); 1205 p2p->op_reg_class = op_class; 1206 p2p->op_channel = op_channel; 1207 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 && 1208 p2p_supported_freq(p2p, p2p->best_freq_24) && 1209 p2p_freq_to_channel(p2p->best_freq_24, &op_class, 1210 &op_channel) == 0) { 1211 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference"); 1212 p2p->op_reg_class = op_class; 1213 p2p->op_channel = op_channel; 1214 } else if (p2p->cfg->num_pref_chan > 0 && 1215 p2p_channels_includes(&p2p->cfg->channels, 1216 p2p->cfg->pref_chan[0].op_class, 1217 p2p->cfg->pref_chan[0].chan)) { 1218 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference"); 1219 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class; 1220 p2p->op_channel = p2p->cfg->pref_chan[0].chan; 1221 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht, 1222 &p2p->op_reg_class, &p2p->op_channel) == 1223 0) { 1224 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference", 1225 p2p->op_reg_class, p2p->op_channel); 1226 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40, 1227 &p2p->op_reg_class, &p2p->op_channel) == 1228 0) { 1229 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference", 1230 p2p->op_reg_class, p2p->op_channel); 1231 } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz, 1232 &p2p->op_reg_class, &p2p->op_channel) == 1233 0) { 1234 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference", 1235 p2p->op_reg_class, p2p->op_channel); 1236 } else if (p2p_channels_includes(&p2p->cfg->channels, 1237 p2p->cfg->op_reg_class, 1238 p2p->cfg->op_channel)) { 1239 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference"); 1240 p2p->op_reg_class = p2p->cfg->op_reg_class; 1241 p2p->op_channel = p2p->cfg->op_channel; 1242 } else if (p2p_channel_random_social(&p2p->cfg->channels, 1243 &p2p->op_reg_class, 1244 &p2p->op_channel) == 0) { 1245 p2p_dbg(p2p, "Select random available social channel %d from 2.4 GHz band as operating channel preference", 1246 p2p->op_channel); 1247 } else { 1248 /* Select any random available channel from the first available 1249 * operating class */ 1250 p2p_channel_select(&p2p->cfg->channels, NULL, 1251 &p2p->op_reg_class, 1252 &p2p->op_channel); 1253 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference", 1254 p2p->op_channel, p2p->op_reg_class); 1255 } 1256 1257 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1258 sizeof(struct p2p_channels)); 1259} 1260 1261 1262/** 1263 * p2p_prepare_channel - Select operating channel for GO Negotiation 1264 * @p2p: P2P module context from p2p_init() 1265 * @dev: Selected peer device 1266 * @force_freq: Forced frequency in MHz or 0 if not forced 1267 * @pref_freq: Preferred frequency in MHz or 0 if no preference 1268 * @go: Whether the local end will be forced to be GO 1269 * Returns: 0 on success, -1 on failure (channel not supported for P2P) 1270 * 1271 * This function is used to do initial operating channel selection for GO 1272 * Negotiation prior to having received peer information. The selected channel 1273 * may be further optimized in p2p_reselect_channel() once the peer information 1274 * is available. 1275 */ 1276int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev, 1277 unsigned int force_freq, unsigned int pref_freq, int go) 1278{ 1279 p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d", 1280 force_freq, pref_freq, go); 1281 if (force_freq || pref_freq) { 1282 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) < 1283 0) 1284 return -1; 1285 } else { 1286 p2p_prepare_channel_best(p2p); 1287 } 1288 p2p_channels_dump(p2p, "prepared channels", &p2p->channels); 1289 if (go) 1290 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq); 1291 else if (!force_freq) 1292 p2p_channels_union(&p2p->channels, &p2p->cfg->cli_channels, 1293 &p2p->channels); 1294 p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels); 1295 1296 p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s", 1297 p2p->op_reg_class, p2p->op_channel, 1298 force_freq ? " (forced)" : ""); 1299 1300 if (force_freq) 1301 dev->flags |= P2P_DEV_FORCE_FREQ; 1302 else 1303 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1304 1305 return 0; 1306} 1307 1308 1309static void p2p_set_dev_persistent(struct p2p_device *dev, 1310 int persistent_group) 1311{ 1312 switch (persistent_group) { 1313 case 0: 1314 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP | 1315 P2P_DEV_PREFER_PERSISTENT_RECONN); 1316 break; 1317 case 1: 1318 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP; 1319 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN; 1320 break; 1321 case 2: 1322 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP | 1323 P2P_DEV_PREFER_PERSISTENT_RECONN; 1324 break; 1325 } 1326} 1327 1328 1329int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr, 1330 enum p2p_wps_method wps_method, 1331 int go_intent, const u8 *own_interface_addr, 1332 unsigned int force_freq, int persistent_group, 1333 const u8 *force_ssid, size_t force_ssid_len, 1334 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id) 1335{ 1336 struct p2p_device *dev; 1337 1338 p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR 1339 " GO Intent=%d Intended Interface Address=" MACSTR 1340 " wps_method=%d persistent_group=%d pd_before_go_neg=%d " 1341 "oob_pw_id=%u", 1342 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1343 wps_method, persistent_group, pd_before_go_neg, oob_pw_id); 1344 1345 dev = p2p_get_device(p2p, peer_addr); 1346 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 1347 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR, 1348 MAC2STR(peer_addr)); 1349 return -1; 1350 } 1351 1352 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, 1353 go_intent == 15) < 0) 1354 return -1; 1355 1356 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 1357 if (!(dev->info.dev_capab & 1358 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 1359 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1360 " that is in a group and is not discoverable", 1361 MAC2STR(peer_addr)); 1362 return -1; 1363 } 1364 if (dev->oper_freq <= 0) { 1365 p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR 1366 " with incomplete information", 1367 MAC2STR(peer_addr)); 1368 return -1; 1369 } 1370 1371 /* 1372 * First, try to connect directly. If the peer does not 1373 * acknowledge frames, assume it is sleeping and use device 1374 * discoverability via the GO at that point. 1375 */ 1376 } 1377 1378 p2p->ssid_set = 0; 1379 if (force_ssid) { 1380 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1381 force_ssid, force_ssid_len); 1382 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1383 p2p->ssid_len = force_ssid_len; 1384 p2p->ssid_set = 1; 1385 } 1386 1387 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1388 dev->flags &= ~P2P_DEV_USER_REJECTED; 1389 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 1390 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1391 if (pd_before_go_neg) 1392 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG; 1393 else { 1394 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG; 1395 /* 1396 * Assign dialog token and tie breaker here to use the same 1397 * values in each retry within the same GO Negotiation exchange. 1398 */ 1399 dev->dialog_token++; 1400 if (dev->dialog_token == 0) 1401 dev->dialog_token = 1; 1402 dev->tie_breaker = p2p->next_tie_breaker; 1403 p2p->next_tie_breaker = !p2p->next_tie_breaker; 1404 } 1405 dev->connect_reqs = 0; 1406 dev->go_neg_req_sent = 0; 1407 dev->go_state = UNKNOWN_GO; 1408 p2p_set_dev_persistent(dev, persistent_group); 1409 p2p->go_intent = go_intent; 1410 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1411 1412 if (p2p->state != P2P_IDLE) 1413 p2p_stop_find(p2p); 1414 1415 if (p2p->after_scan_tx) { 1416 /* 1417 * We need to drop the pending frame to avoid issues with the 1418 * new GO Negotiation, e.g., when the pending frame was from a 1419 * previous attempt at starting a GO Negotiation. 1420 */ 1421 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion"); 1422 os_free(p2p->after_scan_tx); 1423 p2p->after_scan_tx = NULL; 1424 } 1425 1426 dev->wps_method = wps_method; 1427 dev->oob_pw_id = oob_pw_id; 1428 dev->status = P2P_SC_SUCCESS; 1429 1430 if (p2p->p2p_scan_running) { 1431 p2p_dbg(p2p, "p2p_scan running - delay connect send"); 1432 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT; 1433 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN); 1434 return 0; 1435 } 1436 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1437 1438 return p2p_connect_send(p2p, dev); 1439} 1440 1441 1442int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr, 1443 enum p2p_wps_method wps_method, 1444 int go_intent, const u8 *own_interface_addr, 1445 unsigned int force_freq, int persistent_group, 1446 const u8 *force_ssid, size_t force_ssid_len, 1447 unsigned int pref_freq, u16 oob_pw_id) 1448{ 1449 struct p2p_device *dev; 1450 1451 p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR 1452 " GO Intent=%d Intended Interface Address=" MACSTR 1453 " wps_method=%d persistent_group=%d oob_pw_id=%u", 1454 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1455 wps_method, persistent_group, oob_pw_id); 1456 1457 dev = p2p_get_device(p2p, peer_addr); 1458 if (dev == NULL) { 1459 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR, 1460 MAC2STR(peer_addr)); 1461 return -1; 1462 } 1463 1464 if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent == 1465 15) < 0) 1466 return -1; 1467 1468 p2p->ssid_set = 0; 1469 if (force_ssid) { 1470 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1471 force_ssid, force_ssid_len); 1472 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1473 p2p->ssid_len = force_ssid_len; 1474 p2p->ssid_set = 1; 1475 } 1476 1477 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1478 dev->flags &= ~P2P_DEV_USER_REJECTED; 1479 dev->go_neg_req_sent = 0; 1480 dev->go_state = UNKNOWN_GO; 1481 p2p_set_dev_persistent(dev, persistent_group); 1482 p2p->go_intent = go_intent; 1483 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1484 1485 dev->wps_method = wps_method; 1486 dev->oob_pw_id = oob_pw_id; 1487 dev->status = P2P_SC_SUCCESS; 1488 1489 return 0; 1490} 1491 1492 1493void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr, 1494 struct p2p_device *dev, struct p2p_message *msg) 1495{ 1496 os_get_reltime(&dev->last_seen); 1497 1498 p2p_copy_wps_info(p2p, dev, 0, msg); 1499 1500 if (msg->listen_channel) { 1501 int freq; 1502 freq = p2p_channel_to_freq(msg->listen_channel[3], 1503 msg->listen_channel[4]); 1504 if (freq < 0) { 1505 p2p_dbg(p2p, "Unknown peer Listen channel: " 1506 "country=%c%c(0x%02x) reg_class=%u channel=%u", 1507 msg->listen_channel[0], 1508 msg->listen_channel[1], 1509 msg->listen_channel[2], 1510 msg->listen_channel[3], 1511 msg->listen_channel[4]); 1512 } else { 1513 p2p_dbg(p2p, "Update peer " MACSTR 1514 " Listen channel: %u -> %u MHz", 1515 MAC2STR(dev->info.p2p_device_addr), 1516 dev->listen_freq, freq); 1517 dev->listen_freq = freq; 1518 } 1519 } 1520 1521 if (msg->wfd_subelems) { 1522 wpabuf_free(dev->info.wfd_subelems); 1523 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems); 1524 } 1525 1526 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 1527 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 1528 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request"); 1529 } else { 1530 p2p_dbg(p2p, "Created device entry based on GO Neg Req: " 1531 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' " 1532 "listen_freq=%d", 1533 MAC2STR(dev->info.p2p_device_addr), 1534 dev->info.dev_capab, dev->info.group_capab, 1535 dev->info.device_name, dev->listen_freq); 1536 } 1537 1538 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY; 1539 1540 if (dev->flags & P2P_DEV_USER_REJECTED) { 1541 p2p_dbg(p2p, "Do not report rejected device"); 1542 return; 1543 } 1544 1545 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 1546 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 1547 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 1548} 1549 1550 1551void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len) 1552{ 1553 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 1554 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2); 1555 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2], 1556 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len); 1557 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len; 1558} 1559 1560 1561int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params) 1562{ 1563 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len); 1564 p2p_random(params->passphrase, p2p->cfg->passphrase_len); 1565 return 0; 1566} 1567 1568 1569void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer) 1570{ 1571 struct p2p_go_neg_results res; 1572 int go = peer->go_state == LOCAL_GO; 1573 struct p2p_channels intersection; 1574 int freqs; 1575 size_t i, j; 1576 1577 p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)", 1578 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer"); 1579 1580 os_memset(&res, 0, sizeof(res)); 1581 res.role_go = go; 1582 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 1583 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 1584 res.wps_method = peer->wps_method; 1585 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 1586 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 1587 res.persistent_group = 2; 1588 else 1589 res.persistent_group = 1; 1590 } 1591 1592 if (go) { 1593 /* Setup AP mode for WPS provisioning */ 1594 res.freq = p2p_channel_to_freq(p2p->op_reg_class, 1595 p2p->op_channel); 1596 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1597 res.ssid_len = p2p->ssid_len; 1598 p2p_random(res.passphrase, p2p->cfg->passphrase_len); 1599 } else { 1600 res.freq = peer->oper_freq; 1601 if (p2p->ssid_len) { 1602 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1603 res.ssid_len = p2p->ssid_len; 1604 } 1605 } 1606 1607 p2p_channels_dump(p2p, "own channels", &p2p->channels); 1608 p2p_channels_dump(p2p, "peer channels", &peer->channels); 1609 p2p_channels_intersect(&p2p->channels, &peer->channels, 1610 &intersection); 1611 if (go) { 1612 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq); 1613 p2p_channels_dump(p2p, "intersection after no-GO removal", 1614 &intersection); 1615 } 1616 freqs = 0; 1617 for (i = 0; i < intersection.reg_classes; i++) { 1618 struct p2p_reg_class *c = &intersection.reg_class[i]; 1619 if (freqs + 1 == P2P_MAX_CHANNELS) 1620 break; 1621 for (j = 0; j < c->channels; j++) { 1622 int freq; 1623 if (freqs + 1 == P2P_MAX_CHANNELS) 1624 break; 1625 freq = p2p_channel_to_freq(c->reg_class, c->channel[j]); 1626 if (freq < 0) 1627 continue; 1628 res.freq_list[freqs++] = freq; 1629 } 1630 } 1631 1632 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout; 1633 1634 p2p_clear_timeout(p2p); 1635 p2p->ssid_set = 0; 1636 peer->go_neg_req_sent = 0; 1637 peer->wps_method = WPS_NOT_READY; 1638 peer->oob_pw_id = 0; 1639 wpabuf_free(peer->go_neg_conf); 1640 peer->go_neg_conf = NULL; 1641 1642 p2p_set_state(p2p, P2P_PROVISIONING); 1643 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 1644} 1645 1646 1647static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa, 1648 const u8 *data, size_t len, int rx_freq) 1649{ 1650 p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa)); 1651 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len); 1652 1653 if (len < 1) 1654 return; 1655 1656 switch (data[0]) { 1657 case P2P_GO_NEG_REQ: 1658 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq); 1659 break; 1660 case P2P_GO_NEG_RESP: 1661 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq); 1662 break; 1663 case P2P_GO_NEG_CONF: 1664 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1); 1665 break; 1666 case P2P_INVITATION_REQ: 1667 p2p_process_invitation_req(p2p, sa, data + 1, len - 1, 1668 rx_freq); 1669 break; 1670 case P2P_INVITATION_RESP: 1671 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 1672 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1); 1673 break; 1674 case P2P_PROV_DISC_REQ: 1675 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1676 break; 1677 case P2P_PROV_DISC_RESP: 1678 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1); 1679 break; 1680 case P2P_DEV_DISC_REQ: 1681 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1682 break; 1683 case P2P_DEV_DISC_RESP: 1684 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1); 1685 break; 1686 default: 1687 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d", 1688 data[0]); 1689 break; 1690 } 1691} 1692 1693 1694static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, 1695 const u8 *sa, const u8 *bssid, const u8 *data, 1696 size_t len, int freq) 1697{ 1698 if (len < 1) 1699 return; 1700 1701 switch (data[0]) { 1702 case WLAN_PA_VENDOR_SPECIFIC: 1703 data++; 1704 len--; 1705 if (len < 4) 1706 return; 1707 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1708 return; 1709 1710 data += 4; 1711 len -= 4; 1712 1713 p2p_rx_p2p_action(p2p, sa, data, len, freq); 1714 break; 1715 case WLAN_PA_GAS_INITIAL_REQ: 1716 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq); 1717 break; 1718 case WLAN_PA_GAS_INITIAL_RESP: 1719 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq); 1720 break; 1721 case WLAN_PA_GAS_COMEBACK_REQ: 1722 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq); 1723 break; 1724 case WLAN_PA_GAS_COMEBACK_RESP: 1725 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq); 1726 break; 1727 } 1728} 1729 1730 1731void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa, 1732 const u8 *bssid, u8 category, 1733 const u8 *data, size_t len, int freq) 1734{ 1735 if (category == WLAN_ACTION_PUBLIC) { 1736 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq); 1737 return; 1738 } 1739 1740 if (category != WLAN_ACTION_VENDOR_SPECIFIC) 1741 return; 1742 1743 if (len < 4) 1744 return; 1745 1746 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE) 1747 return; 1748 data += 4; 1749 len -= 4; 1750 1751 /* P2P action frame */ 1752 p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa)); 1753 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len); 1754 1755 if (len < 1) 1756 return; 1757 switch (data[0]) { 1758 case P2P_NOA: 1759 p2p_dbg(p2p, "Received P2P Action - Notice of Absence"); 1760 /* TODO */ 1761 break; 1762 case P2P_PRESENCE_REQ: 1763 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq); 1764 break; 1765 case P2P_PRESENCE_RESP: 1766 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1); 1767 break; 1768 case P2P_GO_DISC_REQ: 1769 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq); 1770 break; 1771 default: 1772 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]); 1773 break; 1774 } 1775} 1776 1777 1778static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx) 1779{ 1780 struct p2p_data *p2p = eloop_ctx; 1781 if (p2p->go_neg_peer == NULL) 1782 return; 1783 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1784 p2p->go_neg_peer->status = P2P_SC_SUCCESS; 1785 p2p_connect_send(p2p, p2p->go_neg_peer); 1786} 1787 1788 1789static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx) 1790{ 1791 struct p2p_data *p2p = eloop_ctx; 1792 if (p2p->invite_peer == NULL) 1793 return; 1794 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1795 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr, 1796 p2p->invite_dev_pw_id); 1797} 1798 1799 1800static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr, 1801 const u8 *ie, size_t ie_len) 1802{ 1803 struct p2p_message msg; 1804 struct p2p_device *dev; 1805 1806 os_memset(&msg, 0, sizeof(msg)); 1807 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL) 1808 { 1809 p2p_parse_free(&msg); 1810 return; /* not a P2P probe */ 1811 } 1812 1813 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 1814 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 1815 != 0) { 1816 /* The Probe Request is not part of P2P Device Discovery. It is 1817 * not known whether the source address of the frame is the P2P 1818 * Device Address or P2P Interface Address. Do not add a new 1819 * peer entry based on this frames. 1820 */ 1821 p2p_parse_free(&msg); 1822 return; 1823 } 1824 1825 dev = p2p_get_device(p2p, addr); 1826 if (dev) { 1827 if (dev->country[0] == 0 && msg.listen_channel) 1828 os_memcpy(dev->country, msg.listen_channel, 3); 1829 os_get_reltime(&dev->last_seen); 1830 p2p_parse_free(&msg); 1831 return; /* already known */ 1832 } 1833 1834 dev = p2p_create_device(p2p, addr); 1835 if (dev == NULL) { 1836 p2p_parse_free(&msg); 1837 return; 1838 } 1839 1840 os_get_reltime(&dev->last_seen); 1841 dev->flags |= P2P_DEV_PROBE_REQ_ONLY; 1842 1843 if (msg.listen_channel) { 1844 os_memcpy(dev->country, msg.listen_channel, 3); 1845 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3], 1846 msg.listen_channel[4]); 1847 } 1848 1849 p2p_copy_wps_info(p2p, dev, 1, &msg); 1850 1851 if (msg.wfd_subelems) { 1852 wpabuf_free(dev->info.wfd_subelems); 1853 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems); 1854 } 1855 1856 p2p_parse_free(&msg); 1857 1858 p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR 1859 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d", 1860 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab, 1861 dev->info.group_capab, dev->info.device_name, 1862 dev->listen_freq); 1863} 1864 1865 1866struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p, 1867 const u8 *addr, 1868 struct p2p_message *msg) 1869{ 1870 struct p2p_device *dev; 1871 1872 dev = p2p_get_device(p2p, addr); 1873 if (dev) { 1874 os_get_reltime(&dev->last_seen); 1875 return dev; /* already known */ 1876 } 1877 1878 dev = p2p_create_device(p2p, addr); 1879 if (dev == NULL) 1880 return NULL; 1881 1882 p2p_add_dev_info(p2p, addr, dev, msg); 1883 1884 return dev; 1885} 1886 1887 1888static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type) 1889{ 1890 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0) 1891 return 1; 1892 if (os_memcmp(dev_type, req_dev_type, 2) == 0 && 1893 WPA_GET_BE32(&req_dev_type[2]) == 0 && 1894 WPA_GET_BE16(&req_dev_type[6]) == 0) 1895 return 1; /* Category match with wildcard OUI/sub-category */ 1896 return 0; 1897} 1898 1899 1900int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[], 1901 size_t num_req_dev_type) 1902{ 1903 size_t i; 1904 for (i = 0; i < num_req_dev_type; i++) { 1905 if (dev_type_match(dev_type, req_dev_type[i])) 1906 return 1; 1907 } 1908 return 0; 1909} 1910 1911 1912/** 1913 * p2p_match_dev_type - Match local device type with requested type 1914 * @p2p: P2P module context from p2p_init() 1915 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) 1916 * Returns: 1 on match, 0 on mismatch 1917 * 1918 * This function can be used to match the Requested Device Type attribute in 1919 * WPS IE with the local device types for deciding whether to reply to a Probe 1920 * Request frame. 1921 */ 1922int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps) 1923{ 1924 struct wps_parse_attr attr; 1925 size_t i; 1926 1927 if (wps_parse_msg(wps, &attr)) 1928 return 1; /* assume no Requested Device Type attributes */ 1929 1930 if (attr.num_req_dev_type == 0) 1931 return 1; /* no Requested Device Type attributes -> match */ 1932 1933 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type, 1934 attr.num_req_dev_type)) 1935 return 1; /* Own Primary Device Type matches */ 1936 1937 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) 1938 if (dev_type_list_match(p2p->cfg->sec_dev_type[i], 1939 attr.req_dev_type, 1940 attr.num_req_dev_type)) 1941 return 1; /* Own Secondary Device Type matches */ 1942 1943 /* No matching device type found */ 1944 return 0; 1945} 1946 1947 1948struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p) 1949{ 1950 struct wpabuf *buf; 1951 u8 *len; 1952 int pw_id = -1; 1953 size_t extra = 0; 1954 1955#ifdef CONFIG_WIFI_DISPLAY 1956 if (p2p->wfd_ie_probe_resp) 1957 extra = wpabuf_len(p2p->wfd_ie_probe_resp); 1958#endif /* CONFIG_WIFI_DISPLAY */ 1959 1960 buf = wpabuf_alloc(1000 + extra); 1961 if (buf == NULL) 1962 return NULL; 1963 1964 if (p2p->go_neg_peer) { 1965 /* Advertise immediate availability of WPS credential */ 1966 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method); 1967 } 1968 1969 if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) { 1970 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response"); 1971 wpabuf_free(buf); 1972 return NULL; 1973 } 1974 1975#ifdef CONFIG_WIFI_DISPLAY 1976 if (p2p->wfd_ie_probe_resp) 1977 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp); 1978#endif /* CONFIG_WIFI_DISPLAY */ 1979 1980 /* P2P IE */ 1981 len = p2p_buf_add_ie_hdr(buf); 1982 p2p_buf_add_capability(buf, p2p->dev_capab & 1983 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 1984 if (p2p->ext_listen_interval) 1985 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 1986 p2p->ext_listen_interval); 1987 p2p_buf_add_device_info(buf, p2p, NULL); 1988 p2p_buf_update_ie_hdr(buf, len); 1989 1990 return buf; 1991} 1992 1993 1994static enum p2p_probe_req_status 1995p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 1996 const u8 *bssid, const u8 *ie, size_t ie_len) 1997{ 1998 struct ieee802_11_elems elems; 1999 struct wpabuf *buf; 2000 struct ieee80211_mgmt *resp; 2001 struct p2p_message msg; 2002 struct wpabuf *ies; 2003 2004 if (!p2p->in_listen || !p2p->drv_in_listen) { 2005 /* not in Listen state - ignore Probe Request */ 2006 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request", 2007 p2p->in_listen, p2p->drv_in_listen); 2008 return P2P_PREQ_NOT_LISTEN; 2009 } 2010 2011 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) == 2012 ParseFailed) { 2013 /* Ignore invalid Probe Request frames */ 2014 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it"); 2015 return P2P_PREQ_MALFORMED; 2016 } 2017 2018 if (elems.p2p == NULL) { 2019 /* not a P2P probe - ignore it */ 2020 p2p_dbg(p2p, "Not a P2P probe - ignore it"); 2021 return P2P_PREQ_NOT_P2P; 2022 } 2023 2024 if (dst && !is_broadcast_ether_addr(dst) && 2025 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2026 /* Not sent to the broadcast address or our P2P Device Address 2027 */ 2028 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it", 2029 MAC2STR(dst)); 2030 return P2P_PREQ_NOT_PROCESSED; 2031 } 2032 2033 if (bssid && !is_broadcast_ether_addr(bssid)) { 2034 /* Not sent to the Wildcard BSSID */ 2035 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it", 2036 MAC2STR(bssid)); 2037 return P2P_PREQ_NOT_PROCESSED; 2038 } 2039 2040 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN || 2041 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) != 2042 0) { 2043 /* not using P2P Wildcard SSID - ignore */ 2044 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it"); 2045 return P2P_PREQ_NOT_PROCESSED; 2046 } 2047 2048 if (supp_rates_11b_only(&elems)) { 2049 /* Indicates support for 11b rates only */ 2050 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it"); 2051 return P2P_PREQ_NOT_P2P; 2052 } 2053 2054 os_memset(&msg, 0, sizeof(msg)); 2055 if (p2p_parse_ies(ie, ie_len, &msg) < 0) { 2056 /* Could not parse P2P attributes */ 2057 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it"); 2058 return P2P_PREQ_NOT_P2P; 2059 } 2060 2061 if (msg.device_id && 2062 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 2063 /* Device ID did not match */ 2064 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it", 2065 MAC2STR(msg.device_id)); 2066 p2p_parse_free(&msg); 2067 return P2P_PREQ_NOT_PROCESSED; 2068 } 2069 2070 /* Check Requested Device Type match */ 2071 if (msg.wps_attributes && 2072 !p2p_match_dev_type(p2p, msg.wps_attributes)) { 2073 /* No match with Requested Device Type */ 2074 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it"); 2075 p2p_parse_free(&msg); 2076 return P2P_PREQ_NOT_PROCESSED; 2077 } 2078 p2p_parse_free(&msg); 2079 2080 if (!p2p->cfg->send_probe_resp) { 2081 /* Response generated elsewhere */ 2082 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response"); 2083 return P2P_PREQ_NOT_PROCESSED; 2084 } 2085 2086 p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state"); 2087 2088 /* 2089 * We do not really have a specific BSS that this frame is advertising, 2090 * so build a frame that has some information in valid format. This is 2091 * really only used for discovery purposes, not to learn exact BSS 2092 * parameters. 2093 */ 2094 ies = p2p_build_probe_resp_ies(p2p); 2095 if (ies == NULL) 2096 return P2P_PREQ_NOT_PROCESSED; 2097 2098 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 2099 if (buf == NULL) { 2100 wpabuf_free(ies); 2101 return P2P_PREQ_NOT_PROCESSED; 2102 } 2103 2104 resp = NULL; 2105 resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp); 2106 2107 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 2108 (WLAN_FC_STYPE_PROBE_RESP << 4)); 2109 os_memcpy(resp->da, addr, ETH_ALEN); 2110 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN); 2111 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN); 2112 resp->u.probe_resp.beacon_int = host_to_le16(100); 2113 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 2114 resp->u.probe_resp.capab_info = 2115 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE | 2116 WLAN_CAPABILITY_PRIVACY | 2117 WLAN_CAPABILITY_SHORT_SLOT_TIME); 2118 2119 wpabuf_put_u8(buf, WLAN_EID_SSID); 2120 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN); 2121 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 2122 2123 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES); 2124 wpabuf_put_u8(buf, 8); 2125 wpabuf_put_u8(buf, (60 / 5) | 0x80); 2126 wpabuf_put_u8(buf, 90 / 5); 2127 wpabuf_put_u8(buf, (120 / 5) | 0x80); 2128 wpabuf_put_u8(buf, 180 / 5); 2129 wpabuf_put_u8(buf, (240 / 5) | 0x80); 2130 wpabuf_put_u8(buf, 360 / 5); 2131 wpabuf_put_u8(buf, 480 / 5); 2132 wpabuf_put_u8(buf, 540 / 5); 2133 2134 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS); 2135 wpabuf_put_u8(buf, 1); 2136 wpabuf_put_u8(buf, p2p->cfg->channel); 2137 2138 wpabuf_put_buf(buf, ies); 2139 wpabuf_free(ies); 2140 2141 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf); 2142 2143 wpabuf_free(buf); 2144 2145 return P2P_PREQ_NOT_PROCESSED; 2146} 2147 2148 2149enum p2p_probe_req_status 2150p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2151 const u8 *bssid, const u8 *ie, size_t ie_len) 2152{ 2153 enum p2p_probe_req_status res; 2154 2155 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len); 2156 2157 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len); 2158 2159 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) && 2160 p2p->go_neg_peer && 2161 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN) 2162 == 0 && 2163 !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 2164 /* Received a Probe Request from GO Negotiation peer */ 2165 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout"); 2166 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2167 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL); 2168 return P2P_PREQ_PROCESSED; 2169 } 2170 2171 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) && 2172 p2p->invite_peer && 2173 (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) && 2174 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN) 2175 == 0) { 2176 /* Received a Probe Request from Invite peer */ 2177 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout"); 2178 eloop_cancel_timeout(p2p_invite_start, p2p, NULL); 2179 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL); 2180 return P2P_PREQ_PROCESSED; 2181 } 2182 2183 return res; 2184} 2185 2186 2187static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid, 2188 u8 *buf, size_t len, struct wpabuf *p2p_ie) 2189{ 2190 struct wpabuf *tmp; 2191 u8 *lpos; 2192 size_t tmplen; 2193 int res; 2194 u8 group_capab; 2195 2196 if (p2p_ie == NULL) 2197 return 0; /* WLAN AP is not a P2P manager */ 2198 2199 /* 2200 * (Re)Association Request - P2P IE 2201 * P2P Capability attribute (shall be present) 2202 * P2P Interface attribute (present if concurrent device and 2203 * P2P Management is enabled) 2204 */ 2205 tmp = wpabuf_alloc(200); 2206 if (tmp == NULL) 2207 return -1; 2208 2209 lpos = p2p_buf_add_ie_hdr(tmp); 2210 group_capab = 0; 2211 if (p2p->num_groups > 0) { 2212 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; 2213 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2214 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) && 2215 p2p->cross_connect) 2216 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 2217 } 2218 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab); 2219 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2220 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED)) 2221 p2p_buf_add_p2p_interface(tmp, p2p); 2222 p2p_buf_update_ie_hdr(tmp, lpos); 2223 2224 tmplen = wpabuf_len(tmp); 2225 if (tmplen > len) 2226 res = -1; 2227 else { 2228 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2229 res = tmplen; 2230 } 2231 wpabuf_free(tmp); 2232 2233 return res; 2234} 2235 2236 2237int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf, 2238 size_t len, int p2p_group, struct wpabuf *p2p_ie) 2239{ 2240 struct wpabuf *tmp; 2241 u8 *lpos; 2242 struct p2p_device *peer; 2243 size_t tmplen; 2244 int res; 2245 size_t extra = 0; 2246 2247 if (!p2p_group) 2248 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie); 2249 2250#ifdef CONFIG_WIFI_DISPLAY 2251 if (p2p->wfd_ie_assoc_req) 2252 extra = wpabuf_len(p2p->wfd_ie_assoc_req); 2253#endif /* CONFIG_WIFI_DISPLAY */ 2254 2255 /* 2256 * (Re)Association Request - P2P IE 2257 * P2P Capability attribute (shall be present) 2258 * Extended Listen Timing (may be present) 2259 * P2P Device Info attribute (shall be present) 2260 */ 2261 tmp = wpabuf_alloc(200 + extra); 2262 if (tmp == NULL) 2263 return -1; 2264 2265#ifdef CONFIG_WIFI_DISPLAY 2266 if (p2p->wfd_ie_assoc_req) 2267 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req); 2268#endif /* CONFIG_WIFI_DISPLAY */ 2269 2270 peer = bssid ? p2p_get_device(p2p, bssid) : NULL; 2271 2272 lpos = p2p_buf_add_ie_hdr(tmp); 2273 p2p_buf_add_capability(tmp, p2p->dev_capab, 0); 2274 if (p2p->ext_listen_interval) 2275 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period, 2276 p2p->ext_listen_interval); 2277 p2p_buf_add_device_info(tmp, p2p, peer); 2278 p2p_buf_update_ie_hdr(tmp, lpos); 2279 2280 tmplen = wpabuf_len(tmp); 2281 if (tmplen > len) 2282 res = -1; 2283 else { 2284 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2285 res = tmplen; 2286 } 2287 wpabuf_free(tmp); 2288 2289 return res; 2290} 2291 2292 2293int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) 2294{ 2295 struct wpabuf *p2p_ie; 2296 int ret; 2297 2298 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); 2299 if (p2p_ie == NULL) 2300 return 0; 2301 2302 ret = p2p_attr_text(p2p_ie, buf, end); 2303 wpabuf_free(p2p_ie); 2304 return ret; 2305} 2306 2307 2308int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr) 2309{ 2310 struct p2p_message msg; 2311 2312 os_memset(&msg, 0, sizeof(msg)); 2313 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 2314 return -1; 2315 2316 if (msg.p2p_device_addr) { 2317 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); 2318 return 0; 2319 } else if (msg.device_id) { 2320 os_memcpy(dev_addr, msg.device_id, ETH_ALEN); 2321 return 0; 2322 } 2323 return -1; 2324} 2325 2326 2327int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr) 2328{ 2329 struct wpabuf *p2p_ie; 2330 int ret; 2331 2332 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 2333 P2P_IE_VENDOR_TYPE); 2334 if (p2p_ie == NULL) 2335 return -1; 2336 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr); 2337 wpabuf_free(p2p_ie); 2338 return ret; 2339} 2340 2341 2342static void p2p_clear_go_neg(struct p2p_data *p2p) 2343{ 2344 p2p->go_neg_peer = NULL; 2345 p2p_clear_timeout(p2p); 2346 p2p_set_state(p2p, P2P_IDLE); 2347} 2348 2349 2350void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr) 2351{ 2352 if (p2p->go_neg_peer == NULL) { 2353 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification"); 2354 return; /* No pending Group Formation */ 2355 } 2356 2357 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) != 2358 0) { 2359 p2p_dbg(p2p, "Ignore WPS registration success notification for " 2360 MACSTR " (GO Negotiation peer " MACSTR ")", 2361 MAC2STR(mac_addr), 2362 MAC2STR(p2p->go_neg_peer->intended_addr)); 2363 return; /* Ignore unexpected peer address */ 2364 } 2365 2366 p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR, 2367 MAC2STR(mac_addr)); 2368 2369 p2p_clear_go_neg(p2p); 2370} 2371 2372 2373void p2p_group_formation_failed(struct p2p_data *p2p) 2374{ 2375 if (p2p->go_neg_peer == NULL) { 2376 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification"); 2377 return; /* No pending Group Formation */ 2378 } 2379 2380 p2p_dbg(p2p, "Group Formation failed with " MACSTR, 2381 MAC2STR(p2p->go_neg_peer->intended_addr)); 2382 2383 p2p_clear_go_neg(p2p); 2384} 2385 2386 2387struct p2p_data * p2p_init(const struct p2p_config *cfg) 2388{ 2389 struct p2p_data *p2p; 2390 2391 if (cfg->max_peers < 1 || 2392 cfg->passphrase_len < 8 || cfg->passphrase_len > 63) 2393 return NULL; 2394 2395 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg)); 2396 if (p2p == NULL) 2397 return NULL; 2398 p2p->cfg = (struct p2p_config *) (p2p + 1); 2399 os_memcpy(p2p->cfg, cfg, sizeof(*cfg)); 2400 if (cfg->dev_name) 2401 p2p->cfg->dev_name = os_strdup(cfg->dev_name); 2402 if (cfg->manufacturer) 2403 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer); 2404 if (cfg->model_name) 2405 p2p->cfg->model_name = os_strdup(cfg->model_name); 2406 if (cfg->model_number) 2407 p2p->cfg->model_number = os_strdup(cfg->model_number); 2408 if (cfg->serial_number) 2409 p2p->cfg->serial_number = os_strdup(cfg->serial_number); 2410 if (cfg->pref_chan) { 2411 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan * 2412 sizeof(struct p2p_channel)); 2413 if (p2p->cfg->pref_chan) { 2414 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan, 2415 cfg->num_pref_chan * 2416 sizeof(struct p2p_channel)); 2417 } else 2418 p2p->cfg->num_pref_chan = 0; 2419 } 2420 2421 p2p->min_disc_int = 1; 2422 p2p->max_disc_int = 3; 2423 p2p->max_disc_tu = -1; 2424 2425 os_get_random(&p2p->next_tie_breaker, 1); 2426 p2p->next_tie_breaker &= 0x01; 2427 if (cfg->sd_request) 2428 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 2429 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE; 2430 if (cfg->concurrent_operations) 2431 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER; 2432 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 2433 2434 dl_list_init(&p2p->devices); 2435 2436 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 2437 p2p_expiration_timeout, p2p, NULL); 2438 2439 p2p->go_timeout = 100; 2440 p2p->client_timeout = 20; 2441 p2p->num_p2p_sd_queries = 0; 2442 2443 p2p_dbg(p2p, "initialized"); 2444 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 2445 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 2446 2447 return p2p; 2448} 2449 2450 2451void p2p_deinit(struct p2p_data *p2p) 2452{ 2453#ifdef CONFIG_WIFI_DISPLAY 2454 wpabuf_free(p2p->wfd_ie_beacon); 2455 wpabuf_free(p2p->wfd_ie_probe_req); 2456 wpabuf_free(p2p->wfd_ie_probe_resp); 2457 wpabuf_free(p2p->wfd_ie_assoc_req); 2458 wpabuf_free(p2p->wfd_ie_invitation); 2459 wpabuf_free(p2p->wfd_ie_prov_disc_req); 2460 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 2461 wpabuf_free(p2p->wfd_ie_go_neg); 2462 wpabuf_free(p2p->wfd_dev_info); 2463 wpabuf_free(p2p->wfd_assoc_bssid); 2464 wpabuf_free(p2p->wfd_coupled_sink_info); 2465#endif /* CONFIG_WIFI_DISPLAY */ 2466 2467 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL); 2468 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 2469 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2470 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL); 2471 p2p_flush(p2p); 2472 p2p_free_req_dev_types(p2p); 2473 os_free(p2p->cfg->dev_name); 2474 os_free(p2p->cfg->manufacturer); 2475 os_free(p2p->cfg->model_name); 2476 os_free(p2p->cfg->model_number); 2477 os_free(p2p->cfg->serial_number); 2478 os_free(p2p->cfg->pref_chan); 2479 os_free(p2p->groups); 2480 wpabuf_free(p2p->sd_resp); 2481 os_free(p2p->after_scan_tx); 2482 p2p_remove_wps_vendor_extensions(p2p); 2483 os_free(p2p->no_go_freq.range); 2484 os_free(p2p); 2485} 2486 2487 2488void p2p_flush(struct p2p_data *p2p) 2489{ 2490 struct p2p_device *dev, *prev; 2491 p2p_stop_find(p2p); 2492 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device, 2493 list) { 2494 dl_list_del(&dev->list); 2495 p2p_device_free(p2p, dev); 2496 } 2497 p2p_free_sd_queries(p2p); 2498 os_free(p2p->after_scan_tx); 2499 p2p->after_scan_tx = NULL; 2500} 2501 2502 2503int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr) 2504{ 2505 struct p2p_device *dev; 2506 2507 dev = p2p_get_device(p2p, addr); 2508 if (dev == NULL) 2509 return -1; 2510 2511 p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr)); 2512 2513 if (p2p->go_neg_peer == dev) 2514 p2p->go_neg_peer = NULL; 2515 2516 dev->wps_method = WPS_NOT_READY; 2517 dev->oob_pw_id = 0; 2518 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 2519 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 2520 2521 /* Check if after_scan_tx is for this peer. If so free it */ 2522 if (p2p->after_scan_tx && 2523 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) { 2524 os_free(p2p->after_scan_tx); 2525 p2p->after_scan_tx = NULL; 2526 } 2527 2528 return 0; 2529} 2530 2531 2532int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name) 2533{ 2534 os_free(p2p->cfg->dev_name); 2535 if (dev_name) { 2536 p2p->cfg->dev_name = os_strdup(dev_name); 2537 if (p2p->cfg->dev_name == NULL) 2538 return -1; 2539 } else 2540 p2p->cfg->dev_name = NULL; 2541 return 0; 2542} 2543 2544 2545int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer) 2546{ 2547 os_free(p2p->cfg->manufacturer); 2548 p2p->cfg->manufacturer = NULL; 2549 if (manufacturer) { 2550 p2p->cfg->manufacturer = os_strdup(manufacturer); 2551 if (p2p->cfg->manufacturer == NULL) 2552 return -1; 2553 } 2554 2555 return 0; 2556} 2557 2558 2559int p2p_set_model_name(struct p2p_data *p2p, const char *model_name) 2560{ 2561 os_free(p2p->cfg->model_name); 2562 p2p->cfg->model_name = NULL; 2563 if (model_name) { 2564 p2p->cfg->model_name = os_strdup(model_name); 2565 if (p2p->cfg->model_name == NULL) 2566 return -1; 2567 } 2568 2569 return 0; 2570} 2571 2572 2573int p2p_set_model_number(struct p2p_data *p2p, const char *model_number) 2574{ 2575 os_free(p2p->cfg->model_number); 2576 p2p->cfg->model_number = NULL; 2577 if (model_number) { 2578 p2p->cfg->model_number = os_strdup(model_number); 2579 if (p2p->cfg->model_number == NULL) 2580 return -1; 2581 } 2582 2583 return 0; 2584} 2585 2586 2587int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number) 2588{ 2589 os_free(p2p->cfg->serial_number); 2590 p2p->cfg->serial_number = NULL; 2591 if (serial_number) { 2592 p2p->cfg->serial_number = os_strdup(serial_number); 2593 if (p2p->cfg->serial_number == NULL) 2594 return -1; 2595 } 2596 2597 return 0; 2598} 2599 2600 2601void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods) 2602{ 2603 p2p->cfg->config_methods = config_methods; 2604} 2605 2606 2607void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid) 2608{ 2609 os_memcpy(p2p->cfg->uuid, uuid, 16); 2610} 2611 2612 2613int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type) 2614{ 2615 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8); 2616 return 0; 2617} 2618 2619 2620int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8], 2621 size_t num_dev_types) 2622{ 2623 if (num_dev_types > P2P_SEC_DEVICE_TYPES) 2624 num_dev_types = P2P_SEC_DEVICE_TYPES; 2625 p2p->cfg->num_sec_dev_types = num_dev_types; 2626 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8); 2627 return 0; 2628} 2629 2630 2631void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p) 2632{ 2633 int i; 2634 2635 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2636 wpabuf_free(p2p->wps_vendor_ext[i]); 2637 p2p->wps_vendor_ext[i] = NULL; 2638 } 2639} 2640 2641 2642int p2p_add_wps_vendor_extension(struct p2p_data *p2p, 2643 const struct wpabuf *vendor_ext) 2644{ 2645 int i; 2646 2647 if (vendor_ext == NULL) 2648 return -1; 2649 2650 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2651 if (p2p->wps_vendor_ext[i] == NULL) 2652 break; 2653 } 2654 if (i >= P2P_MAX_WPS_VENDOR_EXT) 2655 return -1; 2656 2657 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext); 2658 if (p2p->wps_vendor_ext[i] == NULL) 2659 return -1; 2660 2661 return 0; 2662} 2663 2664 2665int p2p_set_country(struct p2p_data *p2p, const char *country) 2666{ 2667 os_memcpy(p2p->cfg->country, country, 3); 2668 return 0; 2669} 2670 2671 2672void p2p_continue_find(struct p2p_data *p2p) 2673{ 2674 struct p2p_device *dev; 2675 p2p_set_state(p2p, P2P_SEARCH); 2676 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2677 if (dev->sd_pending_bcast_queries == 0) { 2678 /* Initialize with total number of registered broadcast 2679 * SD queries. */ 2680 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries; 2681 } 2682 2683 if (p2p_start_sd(p2p, dev) == 0) 2684 return; 2685 if (dev->req_config_methods && 2686 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) { 2687 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 2688 MACSTR " (config methods 0x%x)", 2689 MAC2STR(dev->info.p2p_device_addr), 2690 dev->req_config_methods); 2691 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0) 2692 return; 2693 } 2694 } 2695 2696 p2p_listen_in_find(p2p, 1); 2697} 2698 2699 2700static void p2p_sd_cb(struct p2p_data *p2p, int success) 2701{ 2702 p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d", 2703 success); 2704 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2705 2706 if (!success) { 2707 p2p->sd_peer = NULL; 2708 p2p_continue_find(p2p); 2709 return; 2710 } 2711 2712 if (p2p->sd_peer == NULL) { 2713 p2p_dbg(p2p, "No SD peer entry known"); 2714 p2p_continue_find(p2p); 2715 return; 2716 } 2717 2718 /* Wait for response from the peer */ 2719 p2p_set_state(p2p, P2P_SD_DURING_FIND); 2720 p2p_set_timeout(p2p, 0, 200000); 2721} 2722 2723 2724/** 2725 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state 2726 * @p2p: P2P module context from p2p_init() 2727 */ 2728static void p2p_retry_pd(struct p2p_data *p2p) 2729{ 2730 struct p2p_device *dev; 2731 2732 if (p2p->state != P2P_IDLE) 2733 return; 2734 2735 /* 2736 * Retry the prov disc req attempt only for the peer that the user had 2737 * requested. 2738 */ 2739 2740 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2741 if (os_memcmp(p2p->pending_pd_devaddr, 2742 dev->info.p2p_device_addr, ETH_ALEN) != 0) 2743 continue; 2744 if (!dev->req_config_methods) 2745 continue; 2746 2747 p2p_dbg(p2p, "Send pending Provision Discovery Request to " 2748 MACSTR " (config methods 0x%x)", 2749 MAC2STR(dev->info.p2p_device_addr), 2750 dev->req_config_methods); 2751 p2p_send_prov_disc_req(p2p, dev, 2752 dev->flags & P2P_DEV_PD_FOR_JOIN, 2753 p2p->pd_force_freq); 2754 return; 2755 } 2756} 2757 2758 2759static void p2p_prov_disc_cb(struct p2p_data *p2p, int success) 2760{ 2761 p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d", 2762 success); 2763 2764 /* 2765 * Postpone resetting the pending action state till after we actually 2766 * time out. This allows us to take some action like notifying any 2767 * interested parties about no response to the request. 2768 * 2769 * When the timer (below) goes off we check in IDLE, SEARCH, or 2770 * LISTEN_ONLY state, which are the only allowed states to issue a PD 2771 * requests in, if this was still pending and then raise notification. 2772 */ 2773 2774 if (!success) { 2775 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2776 2777 if (p2p->user_initiated_pd && 2778 (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY)) 2779 { 2780 /* Retry request from timeout to avoid busy loops */ 2781 p2p->pending_action_state = P2P_PENDING_PD; 2782 p2p_set_timeout(p2p, 0, 50000); 2783 } else if (p2p->state != P2P_IDLE) 2784 p2p_continue_find(p2p); 2785 else if (p2p->user_initiated_pd) { 2786 p2p->pending_action_state = P2P_PENDING_PD; 2787 p2p_set_timeout(p2p, 0, 300000); 2788 } 2789 return; 2790 } 2791 2792 /* 2793 * This postponing, of resetting pending_action_state, needs to be 2794 * done only for user initiated PD requests and not internal ones. 2795 */ 2796 if (p2p->user_initiated_pd) 2797 p2p->pending_action_state = P2P_PENDING_PD; 2798 else 2799 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2800 2801 /* Wait for response from the peer */ 2802 if (p2p->state == P2P_SEARCH) 2803 p2p_set_state(p2p, P2P_PD_DURING_FIND); 2804 p2p_set_timeout(p2p, 0, 200000); 2805} 2806 2807 2808int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq, 2809 struct os_reltime *rx_time, int level, const u8 *ies, 2810 size_t ies_len) 2811{ 2812 if (os_reltime_before(rx_time, &p2p->find_start)) { 2813 /* 2814 * The driver may have cached (e.g., in cfg80211 BSS table) the 2815 * scan results for relatively long time. To avoid reporting 2816 * stale information, update P2P peers only based on results 2817 * that have based on frames received after the last p2p_find 2818 * operation was started. 2819 */ 2820 p2p_dbg(p2p, "Ignore old scan result for " MACSTR 2821 " (rx_time=%u.%06u)", 2822 MAC2STR(bssid), (unsigned int) rx_time->sec, 2823 (unsigned int) rx_time->usec); 2824 return 0; 2825 } 2826 2827 p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1); 2828 2829 return 0; 2830} 2831 2832 2833void p2p_scan_res_handled(struct p2p_data *p2p) 2834{ 2835 if (!p2p->p2p_scan_running) { 2836 p2p_dbg(p2p, "p2p_scan was not running, but scan results received"); 2837 } 2838 p2p->p2p_scan_running = 0; 2839 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2840 2841 if (p2p_run_after_scan(p2p)) 2842 return; 2843 if (p2p->state == P2P_SEARCH) 2844 p2p_continue_find(p2p); 2845} 2846 2847 2848void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id) 2849{ 2850 u8 *len; 2851 2852#ifdef CONFIG_WIFI_DISPLAY 2853 if (p2p->wfd_ie_probe_req) 2854 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req); 2855#endif /* CONFIG_WIFI_DISPLAY */ 2856 2857 len = p2p_buf_add_ie_hdr(ies); 2858 p2p_buf_add_capability(ies, p2p->dev_capab & 2859 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2860 if (dev_id) 2861 p2p_buf_add_device_id(ies, dev_id); 2862 if (p2p->cfg->reg_class && p2p->cfg->channel) 2863 p2p_buf_add_listen_channel(ies, p2p->cfg->country, 2864 p2p->cfg->reg_class, 2865 p2p->cfg->channel); 2866 if (p2p->ext_listen_interval) 2867 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period, 2868 p2p->ext_listen_interval); 2869 /* TODO: p2p_buf_add_operating_channel() if GO */ 2870 p2p_buf_update_ie_hdr(ies, len); 2871} 2872 2873 2874size_t p2p_scan_ie_buf_len(struct p2p_data *p2p) 2875{ 2876 size_t len = 100; 2877 2878#ifdef CONFIG_WIFI_DISPLAY 2879 if (p2p && p2p->wfd_ie_probe_req) 2880 len += wpabuf_len(p2p->wfd_ie_probe_req); 2881#endif /* CONFIG_WIFI_DISPLAY */ 2882 2883 return len; 2884} 2885 2886 2887int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end) 2888{ 2889 return p2p_attr_text(p2p_ie, buf, end); 2890} 2891 2892 2893static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success) 2894{ 2895 struct p2p_device *dev = p2p->go_neg_peer; 2896 int timeout; 2897 2898 p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success); 2899 2900 if (dev == NULL) { 2901 p2p_dbg(p2p, "No pending GO Negotiation"); 2902 return; 2903 } 2904 2905 if (success) { 2906 if (dev->flags & P2P_DEV_USER_REJECTED) { 2907 p2p_set_state(p2p, P2P_IDLE); 2908 return; 2909 } 2910 } else if (dev->go_neg_req_sent) { 2911 /* Cancel the increment from p2p_connect_send() on failure */ 2912 dev->go_neg_req_sent--; 2913 } 2914 2915 if (!success && 2916 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) && 2917 !is_zero_ether_addr(dev->member_in_go_dev)) { 2918 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO", 2919 MAC2STR(dev->info.p2p_device_addr)); 2920 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 2921 p2p_send_dev_disc_req(p2p, dev); 2922 return; 2923 } 2924 2925 /* 2926 * Use P2P find, if needed, to find the other device from its listen 2927 * channel. 2928 */ 2929 p2p_set_state(p2p, P2P_CONNECT); 2930 timeout = success ? 500000 : 100000; 2931 if (!success && p2p->go_neg_peer && 2932 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) { 2933 unsigned int r; 2934 /* 2935 * Peer is expected to wait our response and we will skip the 2936 * listen phase. Add some randomness to the wait time here to 2937 * make it less likely to hit cases where we could end up in 2938 * sync with peer not listening. 2939 */ 2940 os_get_random((u8 *) &r, sizeof(r)); 2941 timeout += r % 100000; 2942 } 2943 p2p_set_timeout(p2p, 0, timeout); 2944} 2945 2946 2947static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success) 2948{ 2949 p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d", 2950 success); 2951 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) { 2952 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore"); 2953 return; 2954 } 2955 p2p_set_state(p2p, P2P_CONNECT); 2956 p2p_set_timeout(p2p, 0, 500000); 2957} 2958 2959 2960static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success, 2961 const u8 *addr) 2962{ 2963 p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success); 2964 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) { 2965 p2p_go_neg_failed(p2p, p2p->go_neg_peer, 2966 p2p->go_neg_peer->status); 2967 } else if (success) { 2968 struct p2p_device *dev; 2969 dev = p2p_get_device(p2p, addr); 2970 if (dev && 2971 dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) 2972 dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE; 2973 } 2974} 2975 2976 2977static void p2p_go_neg_conf_cb(struct p2p_data *p2p, 2978 enum p2p_send_action_result result) 2979{ 2980 struct p2p_device *dev; 2981 2982 p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result); 2983 if (result == P2P_SEND_ACTION_FAILED) { 2984 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 2985 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 2986 return; 2987 } 2988 2989 dev = p2p->go_neg_peer; 2990 2991 if (result == P2P_SEND_ACTION_NO_ACK) { 2992 /* 2993 * Retry GO Negotiation Confirmation 2994 * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive 2995 * ACK for confirmation. 2996 */ 2997 if (dev && dev->go_neg_conf && 2998 dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) { 2999 p2p_dbg(p2p, "GO Negotiation Confirm retry %d", 3000 dev->go_neg_conf_sent); 3001 p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM; 3002 if (p2p_send_action(p2p, dev->go_neg_conf_freq, 3003 dev->info.p2p_device_addr, 3004 p2p->cfg->dev_addr, 3005 dev->info.p2p_device_addr, 3006 wpabuf_head(dev->go_neg_conf), 3007 wpabuf_len(dev->go_neg_conf), 0) >= 3008 0) { 3009 dev->go_neg_conf_sent++; 3010 return; 3011 } 3012 p2p_dbg(p2p, "Failed to re-send Action frame"); 3013 3014 /* 3015 * Continue with the assumption that the first attempt 3016 * went through and just the ACK frame was lost. 3017 */ 3018 } 3019 3020 /* 3021 * It looks like the TX status for GO Negotiation Confirm is 3022 * often showing failure even when the peer has actually 3023 * received the frame. Since the peer may change channels 3024 * immediately after having received the frame, we may not see 3025 * an Ack for retries, so just dropping a single frame may 3026 * trigger this. To allow the group formation to succeed if the 3027 * peer did indeed receive the frame, continue regardless of 3028 * the TX status. 3029 */ 3030 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported"); 3031 } 3032 3033 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3034 3035 if (dev == NULL) 3036 return; 3037 3038 p2p_go_complete(p2p, dev); 3039} 3040 3041 3042void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 3043 const u8 *src, const u8 *bssid, 3044 enum p2p_send_action_result result) 3045{ 3046 enum p2p_pending_action_state state; 3047 int success; 3048 3049 p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR 3050 " src=" MACSTR " bssid=" MACSTR " result=%d", 3051 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), 3052 MAC2STR(bssid), result); 3053 success = result == P2P_SEND_ACTION_SUCCESS; 3054 state = p2p->pending_action_state; 3055 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3056 switch (state) { 3057 case P2P_NO_PENDING_ACTION: 3058 if (p2p->send_action_in_progress) { 3059 p2p->send_action_in_progress = 0; 3060 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3061 } 3062 if (p2p->after_scan_tx_in_progress) { 3063 p2p->after_scan_tx_in_progress = 0; 3064 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING && 3065 p2p_run_after_scan(p2p)) 3066 break; 3067 if (p2p->state == P2P_SEARCH) { 3068 p2p_dbg(p2p, "Continue find after after_scan_tx completion"); 3069 p2p_continue_find(p2p); 3070 } 3071 } 3072 break; 3073 case P2P_PENDING_GO_NEG_REQUEST: 3074 p2p_go_neg_req_cb(p2p, success); 3075 break; 3076 case P2P_PENDING_GO_NEG_RESPONSE: 3077 p2p_go_neg_resp_cb(p2p, success); 3078 break; 3079 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE: 3080 p2p_go_neg_resp_failure_cb(p2p, success, dst); 3081 break; 3082 case P2P_PENDING_GO_NEG_CONFIRM: 3083 p2p_go_neg_conf_cb(p2p, result); 3084 break; 3085 case P2P_PENDING_SD: 3086 p2p_sd_cb(p2p, success); 3087 break; 3088 case P2P_PENDING_PD: 3089 p2p_prov_disc_cb(p2p, success); 3090 break; 3091 case P2P_PENDING_INVITATION_REQUEST: 3092 p2p_invitation_req_cb(p2p, success); 3093 break; 3094 case P2P_PENDING_INVITATION_RESPONSE: 3095 p2p_invitation_resp_cb(p2p, success); 3096 break; 3097 case P2P_PENDING_DEV_DISC_REQUEST: 3098 p2p_dev_disc_req_cb(p2p, success); 3099 break; 3100 case P2P_PENDING_DEV_DISC_RESPONSE: 3101 p2p_dev_disc_resp_cb(p2p, success); 3102 break; 3103 case P2P_PENDING_GO_DISC_REQ: 3104 p2p_go_disc_req_cb(p2p, success); 3105 break; 3106 } 3107 3108 p2p->after_scan_tx_in_progress = 0; 3109} 3110 3111 3112void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq, 3113 unsigned int duration) 3114{ 3115 if (freq == p2p->pending_client_disc_freq) { 3116 p2p_dbg(p2p, "Client discoverability remain-awake completed"); 3117 p2p->pending_client_disc_freq = 0; 3118 return; 3119 } 3120 3121 if (freq != p2p->pending_listen_freq) { 3122 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)", 3123 freq, duration, p2p->pending_listen_freq); 3124 return; 3125 } 3126 3127 p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback", 3128 p2p->pending_listen_sec, p2p->pending_listen_usec, 3129 p2p->pending_listen_freq); 3130 p2p->in_listen = 1; 3131 p2p->drv_in_listen = freq; 3132 if (p2p->pending_listen_sec || p2p->pending_listen_usec) { 3133 /* 3134 * Add 20 msec extra wait to avoid race condition with driver 3135 * remain-on-channel end event, i.e., give driver more time to 3136 * complete the operation before our timeout expires. 3137 */ 3138 p2p_set_timeout(p2p, p2p->pending_listen_sec, 3139 p2p->pending_listen_usec + 20000); 3140 } 3141 3142 p2p->pending_listen_freq = 0; 3143} 3144 3145 3146int p2p_listen_end(struct p2p_data *p2p, unsigned int freq) 3147{ 3148 p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq); 3149 p2p->drv_in_listen = 0; 3150 if (p2p->in_listen) 3151 return 0; /* Internal timeout will trigger the next step */ 3152 3153 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) { 3154 if (p2p->go_neg_peer->connect_reqs >= 120) { 3155 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3156 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3157 return 0; 3158 } 3159 3160 p2p_set_state(p2p, P2P_CONNECT); 3161 p2p_connect_send(p2p, p2p->go_neg_peer); 3162 return 1; 3163 } else if (p2p->state == P2P_SEARCH) { 3164 if (p2p->p2p_scan_running) { 3165 /* 3166 * Search is already in progress. This can happen if 3167 * an Action frame RX is reported immediately after 3168 * the end of a remain-on-channel operation and the 3169 * response frame to that is sent using an offchannel 3170 * operation while in p2p_find. Avoid an attempt to 3171 * restart a scan here. 3172 */ 3173 p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one"); 3174 return 1; 3175 } 3176 if (p2p->pending_listen_freq) { 3177 /* 3178 * Better wait a bit if the driver is unable to start 3179 * offchannel operation for some reason. p2p_search() 3180 * will be started from internal timeout. 3181 */ 3182 p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop"); 3183 p2p_set_timeout(p2p, 0, 100000); 3184 return 1; 3185 } 3186 if (p2p->search_delay) { 3187 p2p_dbg(p2p, "Delay search operation by %u ms", 3188 p2p->search_delay); 3189 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3190 (p2p->search_delay % 1000) * 1000); 3191 return 1; 3192 } 3193 p2p_search(p2p); 3194 return 1; 3195 } 3196 3197 return 0; 3198} 3199 3200 3201static void p2p_timeout_connect(struct p2p_data *p2p) 3202{ 3203 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3204 if (p2p->go_neg_peer && 3205 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 3206 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed"); 3207 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3208 return; 3209 } 3210 if (p2p->go_neg_peer && 3211 (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) && 3212 p2p->go_neg_peer->connect_reqs < 120) { 3213 p2p_dbg(p2p, "Peer expected to wait our response - skip listen"); 3214 p2p_connect_send(p2p, p2p->go_neg_peer); 3215 return; 3216 } 3217 if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) { 3218 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)"); 3219 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3220 p2p_set_timeout(p2p, 0, 30000); 3221 return; 3222 } 3223 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3224 p2p_listen_in_find(p2p, 0); 3225} 3226 3227 3228static void p2p_timeout_connect_listen(struct p2p_data *p2p) 3229{ 3230 if (p2p->go_neg_peer) { 3231 if (p2p->drv_in_listen) { 3232 p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete"); 3233 return; 3234 } 3235 3236 if (p2p->go_neg_peer->connect_reqs >= 120) { 3237 p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response"); 3238 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3239 return; 3240 } 3241 3242 p2p_set_state(p2p, P2P_CONNECT); 3243 p2p_connect_send(p2p, p2p->go_neg_peer); 3244 } else 3245 p2p_set_state(p2p, P2P_IDLE); 3246} 3247 3248 3249static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p) 3250{ 3251 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 3252 3253 if (p2p->cfg->is_concurrent_session_active && 3254 p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx)) 3255 p2p_set_timeout(p2p, 0, 500000); 3256 else 3257 p2p_set_timeout(p2p, 0, 200000); 3258} 3259 3260 3261static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p) 3262{ 3263 struct p2p_device *dev = p2p->go_neg_peer; 3264 struct os_reltime now; 3265 3266 if (dev == NULL) { 3267 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait"); 3268 return; 3269 } 3270 3271 os_get_reltime(&now); 3272 if (os_reltime_expired(&now, &dev->go_neg_wait_started, 120)) { 3273 p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation"); 3274 p2p_go_neg_failed(p2p, dev, -1); 3275 return; 3276 } 3277 3278 p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation"); 3279 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT); 3280 p2p_listen_in_find(p2p, 0); 3281} 3282 3283 3284static void p2p_timeout_sd_during_find(struct p2p_data *p2p) 3285{ 3286 p2p_dbg(p2p, "Service Discovery Query timeout"); 3287 if (p2p->sd_peer) { 3288 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3289 p2p->sd_peer = NULL; 3290 } 3291 p2p_continue_find(p2p); 3292} 3293 3294 3295static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p) 3296{ 3297 p2p_dbg(p2p, "Provision Discovery Request timeout"); 3298 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3299 p2p_continue_find(p2p); 3300} 3301 3302 3303static void p2p_timeout_prov_disc_req(struct p2p_data *p2p) 3304{ 3305 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3306 3307 /* 3308 * For user initiated PD requests that we have not gotten any responses 3309 * for while in IDLE state, we retry them a couple of times before 3310 * giving up. 3311 */ 3312 if (!p2p->user_initiated_pd) 3313 return; 3314 3315 p2p_dbg(p2p, "User initiated Provision Discovery Request timeout"); 3316 3317 if (p2p->pd_retries) { 3318 p2p->pd_retries--; 3319 p2p_retry_pd(p2p); 3320 } else { 3321 struct p2p_device *dev; 3322 int for_join = 0; 3323 3324 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 3325 if (os_memcmp(p2p->pending_pd_devaddr, 3326 dev->info.p2p_device_addr, ETH_ALEN) != 0) 3327 continue; 3328 if (dev->req_config_methods && 3329 (dev->flags & P2P_DEV_PD_FOR_JOIN)) 3330 for_join = 1; 3331 } 3332 3333 if (p2p->cfg->prov_disc_fail) 3334 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, 3335 p2p->pending_pd_devaddr, 3336 for_join ? 3337 P2P_PROV_DISC_TIMEOUT_JOIN : 3338 P2P_PROV_DISC_TIMEOUT); 3339 p2p_reset_pending_pd(p2p); 3340 } 3341} 3342 3343 3344static void p2p_timeout_invite(struct p2p_data *p2p) 3345{ 3346 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3347 p2p_set_state(p2p, P2P_INVITE_LISTEN); 3348 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 3349 /* 3350 * Better remain on operating channel instead of listen channel 3351 * when running a group. 3352 */ 3353 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel"); 3354 p2p_set_timeout(p2p, 0, 100000); 3355 return; 3356 } 3357 p2p_listen_in_find(p2p, 0); 3358} 3359 3360 3361static void p2p_timeout_invite_listen(struct p2p_data *p2p) 3362{ 3363 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) { 3364 p2p_set_state(p2p, P2P_INVITE); 3365 p2p_invite_send(p2p, p2p->invite_peer, 3366 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id); 3367 } else { 3368 if (p2p->invite_peer) { 3369 p2p_dbg(p2p, "Invitation Request retry limit reached"); 3370 if (p2p->cfg->invitation_result) 3371 p2p->cfg->invitation_result( 3372 p2p->cfg->cb_ctx, -1, NULL, NULL, 3373 p2p->invite_peer->info.p2p_device_addr, 3374 0, 0); 3375 } 3376 p2p_set_state(p2p, P2P_IDLE); 3377 } 3378} 3379 3380 3381static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx) 3382{ 3383 struct p2p_data *p2p = eloop_ctx; 3384 3385 p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state)); 3386 3387 p2p->in_listen = 0; 3388 3389 switch (p2p->state) { 3390 case P2P_IDLE: 3391 /* Check if we timed out waiting for PD req */ 3392 if (p2p->pending_action_state == P2P_PENDING_PD) 3393 p2p_timeout_prov_disc_req(p2p); 3394 break; 3395 case P2P_SEARCH: 3396 /* Check if we timed out waiting for PD req */ 3397 if (p2p->pending_action_state == P2P_PENDING_PD) 3398 p2p_timeout_prov_disc_req(p2p); 3399 if (p2p->search_delay && !p2p->in_search_delay) { 3400 p2p_dbg(p2p, "Delay search operation by %u ms", 3401 p2p->search_delay); 3402 p2p->in_search_delay = 1; 3403 p2p_set_timeout(p2p, p2p->search_delay / 1000, 3404 (p2p->search_delay % 1000) * 1000); 3405 break; 3406 } 3407 p2p->in_search_delay = 0; 3408 p2p_search(p2p); 3409 break; 3410 case P2P_CONNECT: 3411 p2p_timeout_connect(p2p); 3412 break; 3413 case P2P_CONNECT_LISTEN: 3414 p2p_timeout_connect_listen(p2p); 3415 break; 3416 case P2P_GO_NEG: 3417 break; 3418 case P2P_LISTEN_ONLY: 3419 /* Check if we timed out waiting for PD req */ 3420 if (p2p->pending_action_state == P2P_PENDING_PD) 3421 p2p_timeout_prov_disc_req(p2p); 3422 3423 if (p2p->ext_listen_only) { 3424 p2p_dbg(p2p, "Extended Listen Timing - Listen State completed"); 3425 p2p->ext_listen_only = 0; 3426 p2p_set_state(p2p, P2P_IDLE); 3427 } 3428 break; 3429 case P2P_WAIT_PEER_CONNECT: 3430 p2p_timeout_wait_peer_connect(p2p); 3431 break; 3432 case P2P_WAIT_PEER_IDLE: 3433 p2p_timeout_wait_peer_idle(p2p); 3434 break; 3435 case P2P_SD_DURING_FIND: 3436 p2p_timeout_sd_during_find(p2p); 3437 break; 3438 case P2P_PROVISIONING: 3439 break; 3440 case P2P_PD_DURING_FIND: 3441 p2p_timeout_prov_disc_during_find(p2p); 3442 break; 3443 case P2P_INVITE: 3444 p2p_timeout_invite(p2p); 3445 break; 3446 case P2P_INVITE_LISTEN: 3447 p2p_timeout_invite_listen(p2p); 3448 break; 3449 } 3450} 3451 3452 3453int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr) 3454{ 3455 struct p2p_device *dev; 3456 3457 dev = p2p_get_device(p2p, peer_addr); 3458 p2p_dbg(p2p, "Local request to reject connection attempts by peer " 3459 MACSTR, MAC2STR(peer_addr)); 3460 if (dev == NULL) { 3461 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr)); 3462 return -1; 3463 } 3464 dev->status = P2P_SC_FAIL_REJECTED_BY_USER; 3465 dev->flags |= P2P_DEV_USER_REJECTED; 3466 return 0; 3467} 3468 3469 3470const char * p2p_wps_method_text(enum p2p_wps_method method) 3471{ 3472 switch (method) { 3473 case WPS_NOT_READY: 3474 return "not-ready"; 3475 case WPS_PIN_DISPLAY: 3476 return "Display"; 3477 case WPS_PIN_KEYPAD: 3478 return "Keypad"; 3479 case WPS_PBC: 3480 return "PBC"; 3481 case WPS_NFC: 3482 return "NFC"; 3483 } 3484 3485 return "??"; 3486} 3487 3488 3489static const char * p2p_go_state_text(enum p2p_go_state go_state) 3490{ 3491 switch (go_state) { 3492 case UNKNOWN_GO: 3493 return "unknown"; 3494 case LOCAL_GO: 3495 return "local"; 3496 case REMOTE_GO: 3497 return "remote"; 3498 } 3499 3500 return "??"; 3501} 3502 3503 3504const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p, 3505 const u8 *addr, int next) 3506{ 3507 struct p2p_device *dev; 3508 3509 if (addr) 3510 dev = p2p_get_device(p2p, addr); 3511 else 3512 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 3513 3514 if (dev && next) { 3515 dev = dl_list_first(&dev->list, struct p2p_device, list); 3516 if (&dev->list == &p2p->devices) 3517 dev = NULL; 3518 } 3519 3520 if (dev == NULL) 3521 return NULL; 3522 3523 return &dev->info; 3524} 3525 3526 3527int p2p_get_peer_info_txt(const struct p2p_peer_info *info, 3528 char *buf, size_t buflen) 3529{ 3530 struct p2p_device *dev; 3531 int res; 3532 char *pos, *end; 3533 struct os_reltime now; 3534 3535 if (info == NULL) 3536 return -1; 3537 3538 dev = (struct p2p_device *) (((u8 *) info) - 3539 offsetof(struct p2p_device, info)); 3540 3541 pos = buf; 3542 end = buf + buflen; 3543 3544 os_get_reltime(&now); 3545 res = os_snprintf(pos, end - pos, 3546 "age=%d\n" 3547 "listen_freq=%d\n" 3548 "wps_method=%s\n" 3549 "interface_addr=" MACSTR "\n" 3550 "member_in_go_dev=" MACSTR "\n" 3551 "member_in_go_iface=" MACSTR "\n" 3552 "go_neg_req_sent=%d\n" 3553 "go_state=%s\n" 3554 "dialog_token=%u\n" 3555 "intended_addr=" MACSTR "\n" 3556 "country=%c%c\n" 3557 "oper_freq=%d\n" 3558 "req_config_methods=0x%x\n" 3559 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n" 3560 "status=%d\n" 3561 "invitation_reqs=%u\n", 3562 (int) (now.sec - dev->last_seen.sec), 3563 dev->listen_freq, 3564 p2p_wps_method_text(dev->wps_method), 3565 MAC2STR(dev->interface_addr), 3566 MAC2STR(dev->member_in_go_dev), 3567 MAC2STR(dev->member_in_go_iface), 3568 dev->go_neg_req_sent, 3569 p2p_go_state_text(dev->go_state), 3570 dev->dialog_token, 3571 MAC2STR(dev->intended_addr), 3572 dev->country[0] ? dev->country[0] : '_', 3573 dev->country[1] ? dev->country[1] : '_', 3574 dev->oper_freq, 3575 dev->req_config_methods, 3576 dev->flags & P2P_DEV_PROBE_REQ_ONLY ? 3577 "[PROBE_REQ_ONLY]" : "", 3578 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "", 3579 dev->flags & P2P_DEV_NOT_YET_READY ? 3580 "[NOT_YET_READY]" : "", 3581 dev->flags & P2P_DEV_PD_PEER_DISPLAY ? 3582 "[PD_PEER_DISPLAY]" : "", 3583 dev->flags & P2P_DEV_PD_PEER_KEYPAD ? 3584 "[PD_PEER_KEYPAD]" : "", 3585 dev->flags & P2P_DEV_USER_REJECTED ? 3586 "[USER_REJECTED]" : "", 3587 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ? 3588 "[PEER_WAITING_RESPONSE]" : "", 3589 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ? 3590 "[PREFER_PERSISTENT_GROUP]" : "", 3591 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ? 3592 "[WAIT_GO_NEG_RESPONSE]" : "", 3593 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ? 3594 "[WAIT_GO_NEG_CONFIRM]" : "", 3595 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ? 3596 "[GROUP_CLIENT_ONLY]" : "", 3597 dev->flags & P2P_DEV_FORCE_FREQ ? 3598 "[FORCE_FREQ]" : "", 3599 dev->flags & P2P_DEV_PD_FOR_JOIN ? 3600 "[PD_FOR_JOIN]" : "", 3601 dev->status, 3602 dev->invitation_reqs); 3603 if (res < 0 || res >= end - pos) 3604 return pos - buf; 3605 pos += res; 3606 3607 if (dev->ext_listen_period) { 3608 res = os_snprintf(pos, end - pos, 3609 "ext_listen_period=%u\n" 3610 "ext_listen_interval=%u\n", 3611 dev->ext_listen_period, 3612 dev->ext_listen_interval); 3613 if (res < 0 || res >= end - pos) 3614 return pos - buf; 3615 pos += res; 3616 } 3617 3618 if (dev->oper_ssid_len) { 3619 res = os_snprintf(pos, end - pos, 3620 "oper_ssid=%s\n", 3621 wpa_ssid_txt(dev->oper_ssid, 3622 dev->oper_ssid_len)); 3623 if (res < 0 || res >= end - pos) 3624 return pos - buf; 3625 pos += res; 3626 } 3627 3628#ifdef CONFIG_WIFI_DISPLAY 3629 if (dev->info.wfd_subelems) { 3630 res = os_snprintf(pos, end - pos, "wfd_subelems="); 3631 if (res < 0 || res >= end - pos) 3632 return pos - buf; 3633 pos += res; 3634 3635 pos += wpa_snprintf_hex(pos, end - pos, 3636 wpabuf_head(dev->info.wfd_subelems), 3637 wpabuf_len(dev->info.wfd_subelems)); 3638 3639 res = os_snprintf(pos, end - pos, "\n"); 3640 if (res < 0 || res >= end - pos) 3641 return pos - buf; 3642 pos += res; 3643 } 3644#endif /* CONFIG_WIFI_DISPLAY */ 3645 3646 return pos - buf; 3647} 3648 3649 3650int p2p_peer_known(struct p2p_data *p2p, const u8 *addr) 3651{ 3652 return p2p_get_device(p2p, addr) != NULL; 3653} 3654 3655 3656void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled) 3657{ 3658 if (enabled) { 3659 p2p_dbg(p2p, "Client discoverability enabled"); 3660 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3661 } else { 3662 p2p_dbg(p2p, "Client discoverability disabled"); 3663 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3664 } 3665} 3666 3667 3668static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1, 3669 u32 duration2, u32 interval2) 3670{ 3671 struct wpabuf *req; 3672 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL; 3673 u8 *len; 3674 3675 req = wpabuf_alloc(100); 3676 if (req == NULL) 3677 return NULL; 3678 3679 if (duration1 || interval1) { 3680 os_memset(&desc1, 0, sizeof(desc1)); 3681 desc1.count_type = 1; 3682 desc1.duration = duration1; 3683 desc1.interval = interval1; 3684 ptr1 = &desc1; 3685 3686 if (duration2 || interval2) { 3687 os_memset(&desc2, 0, sizeof(desc2)); 3688 desc2.count_type = 2; 3689 desc2.duration = duration2; 3690 desc2.interval = interval2; 3691 ptr2 = &desc2; 3692 } 3693 } 3694 3695 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1); 3696 len = p2p_buf_add_ie_hdr(req); 3697 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2); 3698 p2p_buf_update_ie_hdr(req, len); 3699 3700 return req; 3701} 3702 3703 3704int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr, 3705 const u8 *own_interface_addr, unsigned int freq, 3706 u32 duration1, u32 interval1, u32 duration2, 3707 u32 interval2) 3708{ 3709 struct wpabuf *req; 3710 3711 p2p_dbg(p2p, "Send Presence Request to GO " MACSTR 3712 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u " 3713 "dur2=%u int2=%u", 3714 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr), 3715 freq, duration1, interval1, duration2, interval2); 3716 3717 req = p2p_build_presence_req(duration1, interval1, duration2, 3718 interval2); 3719 if (req == NULL) 3720 return -1; 3721 3722 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3723 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr, 3724 go_interface_addr, 3725 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 3726 p2p_dbg(p2p, "Failed to send Action frame"); 3727 } 3728 wpabuf_free(req); 3729 3730 return 0; 3731} 3732 3733 3734static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa, 3735 size_t noa_len, u8 dialog_token) 3736{ 3737 struct wpabuf *resp; 3738 u8 *len; 3739 3740 resp = wpabuf_alloc(100 + noa_len); 3741 if (resp == NULL) 3742 return NULL; 3743 3744 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token); 3745 len = p2p_buf_add_ie_hdr(resp); 3746 p2p_buf_add_status(resp, status); 3747 if (noa) { 3748 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE); 3749 wpabuf_put_le16(resp, noa_len); 3750 wpabuf_put_data(resp, noa, noa_len); 3751 } else 3752 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL); 3753 p2p_buf_update_ie_hdr(resp, len); 3754 3755 return resp; 3756} 3757 3758 3759static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 3760 const u8 *sa, const u8 *data, size_t len, 3761 int rx_freq) 3762{ 3763 struct p2p_message msg; 3764 u8 status; 3765 struct wpabuf *resp; 3766 size_t g; 3767 struct p2p_group *group = NULL; 3768 int parsed = 0; 3769 u8 noa[50]; 3770 int noa_len; 3771 3772 p2p_dbg(p2p, "Received P2P Action - P2P Presence Request"); 3773 3774 for (g = 0; g < p2p->num_groups; g++) { 3775 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]), 3776 ETH_ALEN) == 0) { 3777 group = p2p->groups[g]; 3778 break; 3779 } 3780 } 3781 if (group == NULL) { 3782 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group " 3783 MACSTR, MAC2STR(da)); 3784 return; 3785 } 3786 3787 if (p2p_parse(data, len, &msg) < 0) { 3788 p2p_dbg(p2p, "Failed to parse P2P Presence Request"); 3789 status = P2P_SC_FAIL_INVALID_PARAMS; 3790 goto fail; 3791 } 3792 parsed = 1; 3793 3794 if (msg.noa == NULL) { 3795 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request"); 3796 status = P2P_SC_FAIL_INVALID_PARAMS; 3797 goto fail; 3798 } 3799 3800 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len); 3801 3802fail: 3803 if (p2p->cfg->get_noa) 3804 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa, 3805 sizeof(noa)); 3806 else 3807 noa_len = -1; 3808 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL, 3809 noa_len > 0 ? noa_len : 0, 3810 msg.dialog_token); 3811 if (parsed) 3812 p2p_parse_free(&msg); 3813 if (resp == NULL) 3814 return; 3815 3816 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3817 if (p2p_send_action(p2p, rx_freq, sa, da, da, 3818 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 3819 p2p_dbg(p2p, "Failed to send Action frame"); 3820 } 3821 wpabuf_free(resp); 3822} 3823 3824 3825static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 3826 const u8 *sa, const u8 *data, size_t len) 3827{ 3828 struct p2p_message msg; 3829 3830 p2p_dbg(p2p, "Received P2P Action - P2P Presence Response"); 3831 3832 if (p2p_parse(data, len, &msg) < 0) { 3833 p2p_dbg(p2p, "Failed to parse P2P Presence Response"); 3834 return; 3835 } 3836 3837 if (msg.status == NULL || msg.noa == NULL) { 3838 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response"); 3839 p2p_parse_free(&msg); 3840 return; 3841 } 3842 3843 if (p2p->cfg->presence_resp) { 3844 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status, 3845 msg.noa, msg.noa_len); 3846 } 3847 3848 if (*msg.status) { 3849 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u", 3850 *msg.status); 3851 p2p_parse_free(&msg); 3852 return; 3853 } 3854 3855 p2p_dbg(p2p, "P2P Presence Request was accepted"); 3856 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA", 3857 msg.noa, msg.noa_len); 3858 /* TODO: process NoA */ 3859 p2p_parse_free(&msg); 3860} 3861 3862 3863static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx) 3864{ 3865 struct p2p_data *p2p = eloop_ctx; 3866 3867 if (p2p->ext_listen_interval) { 3868 /* Schedule next extended listen timeout */ 3869 eloop_register_timeout(p2p->ext_listen_interval_sec, 3870 p2p->ext_listen_interval_usec, 3871 p2p_ext_listen_timeout, p2p, NULL); 3872 } 3873 3874 if ((p2p->cfg->is_p2p_in_progress && 3875 p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) || 3876 (p2p->pending_action_state == P2P_PENDING_PD && 3877 p2p->pd_retries > 0)) { 3878 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)", 3879 p2p_state_txt(p2p->state)); 3880 return; 3881 } 3882 3883 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) { 3884 /* 3885 * This should not really happen, but it looks like the Listen 3886 * command may fail is something else (e.g., a scan) was 3887 * running at an inconvenient time. As a workaround, allow new 3888 * Extended Listen operation to be started. 3889 */ 3890 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again"); 3891 p2p->ext_listen_only = 0; 3892 p2p_set_state(p2p, P2P_IDLE); 3893 } 3894 3895 if (p2p->state != P2P_IDLE) { 3896 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state)); 3897 return; 3898 } 3899 3900 p2p_dbg(p2p, "Extended Listen timeout"); 3901 p2p->ext_listen_only = 1; 3902 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) { 3903 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing"); 3904 p2p->ext_listen_only = 0; 3905 } 3906} 3907 3908 3909int p2p_ext_listen(struct p2p_data *p2p, unsigned int period, 3910 unsigned int interval) 3911{ 3912 if (period > 65535 || interval > 65535 || period > interval || 3913 (period == 0 && interval > 0) || (period > 0 && interval == 0)) { 3914 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u", 3915 period, interval); 3916 return -1; 3917 } 3918 3919 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 3920 3921 if (interval == 0) { 3922 p2p_dbg(p2p, "Disabling Extended Listen Timing"); 3923 p2p->ext_listen_period = 0; 3924 p2p->ext_listen_interval = 0; 3925 return 0; 3926 } 3927 3928 p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec", 3929 period, interval); 3930 p2p->ext_listen_period = period; 3931 p2p->ext_listen_interval = interval; 3932 p2p->ext_listen_interval_sec = interval / 1000; 3933 p2p->ext_listen_interval_usec = (interval % 1000) * 1000; 3934 3935 eloop_register_timeout(p2p->ext_listen_interval_sec, 3936 p2p->ext_listen_interval_usec, 3937 p2p_ext_listen_timeout, p2p, NULL); 3938 3939 return 0; 3940} 3941 3942 3943void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 3944 const u8 *ie, size_t ie_len) 3945{ 3946 struct p2p_message msg; 3947 3948 if (bssid == NULL || ie == NULL) 3949 return; 3950 3951 os_memset(&msg, 0, sizeof(msg)); 3952 if (p2p_parse_ies(ie, ie_len, &msg)) 3953 return; 3954 if (msg.minor_reason_code == NULL) { 3955 p2p_parse_free(&msg); 3956 return; 3957 } 3958 3959 p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR 3960 " reason_code=%u minor_reason_code=%u", 3961 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 3962 3963 p2p_parse_free(&msg); 3964} 3965 3966 3967void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 3968 const u8 *ie, size_t ie_len) 3969{ 3970 struct p2p_message msg; 3971 3972 if (bssid == NULL || ie == NULL) 3973 return; 3974 3975 os_memset(&msg, 0, sizeof(msg)); 3976 if (p2p_parse_ies(ie, ie_len, &msg)) 3977 return; 3978 if (msg.minor_reason_code == NULL) { 3979 p2p_parse_free(&msg); 3980 return; 3981 } 3982 3983 p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR 3984 " reason_code=%u minor_reason_code=%u", 3985 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 3986 3987 p2p_parse_free(&msg); 3988} 3989 3990 3991void p2p_set_managed_oper(struct p2p_data *p2p, int enabled) 3992{ 3993 if (enabled) { 3994 p2p_dbg(p2p, "Managed P2P Device operations enabled"); 3995 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED; 3996 } else { 3997 p2p_dbg(p2p, "Managed P2P Device operations disabled"); 3998 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED; 3999 } 4000} 4001 4002 4003int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel, 4004 u8 forced) 4005{ 4006 if (p2p_channel_to_freq(reg_class, channel) < 0) 4007 return -1; 4008 4009 p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u", 4010 reg_class, channel); 4011 4012 /* 4013 * Listen channel was set in configuration or set by control interface; 4014 * cannot override it. 4015 */ 4016 if (p2p->cfg->channel_forced && forced == 0) 4017 return -1; 4018 4019 if (p2p->state == P2P_IDLE) { 4020 p2p->cfg->reg_class = reg_class; 4021 p2p->cfg->channel = channel; 4022 p2p->cfg->channel_forced = forced; 4023 } else { 4024 p2p_dbg(p2p, "Defer setting listen channel"); 4025 p2p->pending_reg_class = reg_class; 4026 p2p->pending_channel = channel; 4027 p2p->pending_channel_forced = forced; 4028 } 4029 4030 return 0; 4031} 4032 4033 4034u8 p2p_get_listen_channel(struct p2p_data *p2p) 4035{ 4036 return p2p->cfg->channel; 4037} 4038 4039 4040int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len) 4041{ 4042 p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len)); 4043 if (postfix == NULL) { 4044 p2p->cfg->ssid_postfix_len = 0; 4045 return 0; 4046 } 4047 if (len > sizeof(p2p->cfg->ssid_postfix)) 4048 return -1; 4049 os_memcpy(p2p->cfg->ssid_postfix, postfix, len); 4050 p2p->cfg->ssid_postfix_len = len; 4051 return 0; 4052} 4053 4054 4055int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel, 4056 int cfg_op_channel) 4057{ 4058 if (p2p_channel_to_freq(op_reg_class, op_channel) < 0) 4059 return -1; 4060 4061 p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u", 4062 op_reg_class, op_channel); 4063 p2p->cfg->op_reg_class = op_reg_class; 4064 p2p->cfg->op_channel = op_channel; 4065 p2p->cfg->cfg_op_channel = cfg_op_channel; 4066 return 0; 4067} 4068 4069 4070int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan, 4071 const struct p2p_channel *pref_chan) 4072{ 4073 struct p2p_channel *n; 4074 4075 if (pref_chan) { 4076 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel)); 4077 if (n == NULL) 4078 return -1; 4079 os_memcpy(n, pref_chan, 4080 num_pref_chan * sizeof(struct p2p_channel)); 4081 } else 4082 n = NULL; 4083 4084 os_free(p2p->cfg->pref_chan); 4085 p2p->cfg->pref_chan = n; 4086 p2p->cfg->num_pref_chan = num_pref_chan; 4087 4088 return 0; 4089} 4090 4091 4092int p2p_set_no_go_freq(struct p2p_data *p2p, 4093 const struct wpa_freq_range_list *list) 4094{ 4095 struct wpa_freq_range *tmp; 4096 4097 if (list == NULL || list->num == 0) { 4098 os_free(p2p->no_go_freq.range); 4099 p2p->no_go_freq.range = NULL; 4100 p2p->no_go_freq.num = 0; 4101 return 0; 4102 } 4103 4104 tmp = os_calloc(list->num, sizeof(struct wpa_freq_range)); 4105 if (tmp == NULL) 4106 return -1; 4107 os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range)); 4108 os_free(p2p->no_go_freq.range); 4109 p2p->no_go_freq.range = tmp; 4110 p2p->no_go_freq.num = list->num; 4111 p2p_dbg(p2p, "Updated no GO chan list"); 4112 4113 return 0; 4114} 4115 4116 4117int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr, 4118 u8 *iface_addr) 4119{ 4120 struct p2p_device *dev = p2p_get_device(p2p, dev_addr); 4121 if (dev == NULL || is_zero_ether_addr(dev->interface_addr)) 4122 return -1; 4123 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN); 4124 return 0; 4125} 4126 4127 4128int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr, 4129 u8 *dev_addr) 4130{ 4131 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4132 if (dev == NULL) 4133 return -1; 4134 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN); 4135 return 0; 4136} 4137 4138 4139void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr) 4140{ 4141 os_memcpy(p2p->peer_filter, addr, ETH_ALEN); 4142 if (is_zero_ether_addr(p2p->peer_filter)) 4143 p2p_dbg(p2p, "Disable peer filter"); 4144 else 4145 p2p_dbg(p2p, "Enable peer filter for " MACSTR, 4146 MAC2STR(p2p->peer_filter)); 4147} 4148 4149 4150void p2p_set_cross_connect(struct p2p_data *p2p, int enabled) 4151{ 4152 p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled"); 4153 if (p2p->cross_connect == enabled) 4154 return; 4155 p2p->cross_connect = enabled; 4156 /* TODO: may need to tear down any action group where we are GO(?) */ 4157} 4158 4159 4160int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr) 4161{ 4162 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 4163 if (dev == NULL) 4164 return -1; 4165 if (dev->oper_freq <= 0) 4166 return -1; 4167 return dev->oper_freq; 4168} 4169 4170 4171void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled) 4172{ 4173 p2p_dbg(p2p, "Intra BSS distribution %s", 4174 enabled ? "enabled" : "disabled"); 4175 p2p->cfg->p2p_intra_bss = enabled; 4176} 4177 4178 4179void p2p_update_channel_list(struct p2p_data *p2p, 4180 const struct p2p_channels *chan, 4181 const struct p2p_channels *cli_chan) 4182{ 4183 p2p_dbg(p2p, "Update channel list"); 4184 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels)); 4185 p2p_channels_dump(p2p, "channels", &p2p->cfg->channels); 4186 os_memcpy(&p2p->cfg->cli_channels, cli_chan, 4187 sizeof(struct p2p_channels)); 4188 p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels); 4189} 4190 4191 4192int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 4193 const u8 *src, const u8 *bssid, const u8 *buf, 4194 size_t len, unsigned int wait_time) 4195{ 4196 if (p2p->p2p_scan_running) { 4197 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes"); 4198 if (p2p->after_scan_tx) { 4199 p2p_dbg(p2p, "Dropped previous pending Action frame TX"); 4200 os_free(p2p->after_scan_tx); 4201 } 4202 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) + 4203 len); 4204 if (p2p->after_scan_tx == NULL) 4205 return -1; 4206 p2p->after_scan_tx->freq = freq; 4207 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN); 4208 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN); 4209 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN); 4210 p2p->after_scan_tx->len = len; 4211 p2p->after_scan_tx->wait_time = wait_time; 4212 os_memcpy(p2p->after_scan_tx + 1, buf, len); 4213 return 0; 4214 } 4215 4216 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid, 4217 buf, len, wait_time); 4218} 4219 4220 4221void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5, 4222 int freq_overall) 4223{ 4224 p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d", 4225 freq_24, freq_5, freq_overall); 4226 p2p->best_freq_24 = freq_24; 4227 p2p->best_freq_5 = freq_5; 4228 p2p->best_freq_overall = freq_overall; 4229} 4230 4231 4232void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq) 4233{ 4234 p2p_dbg(p2p, "Own frequency preference: %d MHz", freq); 4235 p2p->own_freq_preference = freq; 4236} 4237 4238 4239const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p) 4240{ 4241 if (p2p == NULL || p2p->go_neg_peer == NULL) 4242 return NULL; 4243 return p2p->go_neg_peer->info.p2p_device_addr; 4244} 4245 4246 4247const struct p2p_peer_info * 4248p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next) 4249{ 4250 struct p2p_device *dev; 4251 4252 if (addr) { 4253 dev = p2p_get_device(p2p, addr); 4254 if (!dev) 4255 return NULL; 4256 4257 if (!next) { 4258 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 4259 return NULL; 4260 4261 return &dev->info; 4262 } else { 4263 do { 4264 dev = dl_list_first(&dev->list, 4265 struct p2p_device, 4266 list); 4267 if (!dev || &dev->list == &p2p->devices) 4268 return NULL; 4269 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY); 4270 } 4271 } else { 4272 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4273 if (!dev) 4274 return NULL; 4275 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 4276 dev = dl_list_first(&dev->list, 4277 struct p2p_device, 4278 list); 4279 if (!dev || &dev->list == &p2p->devices) 4280 return NULL; 4281 } 4282 } 4283 4284 return &dev->info; 4285} 4286 4287 4288int p2p_in_progress(struct p2p_data *p2p) 4289{ 4290 if (p2p == NULL) 4291 return 0; 4292 if (p2p->state == P2P_SEARCH) 4293 return 2; 4294 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING; 4295} 4296 4297 4298void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout, 4299 u8 client_timeout) 4300{ 4301 if (p2p) { 4302 p2p->go_timeout = go_timeout; 4303 p2p->client_timeout = client_timeout; 4304 } 4305} 4306 4307 4308#ifdef CONFIG_WIFI_DISPLAY 4309 4310static void p2p_update_wfd_ie_groups(struct p2p_data *p2p) 4311{ 4312 size_t g; 4313 struct p2p_group *group; 4314 4315 for (g = 0; g < p2p->num_groups; g++) { 4316 group = p2p->groups[g]; 4317 p2p_group_force_beacon_update_ies(group); 4318 } 4319} 4320 4321 4322int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie) 4323{ 4324 wpabuf_free(p2p->wfd_ie_beacon); 4325 p2p->wfd_ie_beacon = ie; 4326 p2p_update_wfd_ie_groups(p2p); 4327 return 0; 4328} 4329 4330 4331int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie) 4332{ 4333 wpabuf_free(p2p->wfd_ie_probe_req); 4334 p2p->wfd_ie_probe_req = ie; 4335 return 0; 4336} 4337 4338 4339int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie) 4340{ 4341 wpabuf_free(p2p->wfd_ie_probe_resp); 4342 p2p->wfd_ie_probe_resp = ie; 4343 p2p_update_wfd_ie_groups(p2p); 4344 return 0; 4345} 4346 4347 4348int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie) 4349{ 4350 wpabuf_free(p2p->wfd_ie_assoc_req); 4351 p2p->wfd_ie_assoc_req = ie; 4352 return 0; 4353} 4354 4355 4356int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie) 4357{ 4358 wpabuf_free(p2p->wfd_ie_invitation); 4359 p2p->wfd_ie_invitation = ie; 4360 return 0; 4361} 4362 4363 4364int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie) 4365{ 4366 wpabuf_free(p2p->wfd_ie_prov_disc_req); 4367 p2p->wfd_ie_prov_disc_req = ie; 4368 return 0; 4369} 4370 4371 4372int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie) 4373{ 4374 wpabuf_free(p2p->wfd_ie_prov_disc_resp); 4375 p2p->wfd_ie_prov_disc_resp = ie; 4376 return 0; 4377} 4378 4379 4380int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie) 4381{ 4382 wpabuf_free(p2p->wfd_ie_go_neg); 4383 p2p->wfd_ie_go_neg = ie; 4384 return 0; 4385} 4386 4387 4388int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem) 4389{ 4390 wpabuf_free(p2p->wfd_dev_info); 4391 if (elem) { 4392 p2p->wfd_dev_info = wpabuf_dup(elem); 4393 if (p2p->wfd_dev_info == NULL) 4394 return -1; 4395 } else 4396 p2p->wfd_dev_info = NULL; 4397 4398 return 0; 4399} 4400 4401 4402int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem) 4403{ 4404 wpabuf_free(p2p->wfd_assoc_bssid); 4405 if (elem) { 4406 p2p->wfd_assoc_bssid = wpabuf_dup(elem); 4407 if (p2p->wfd_assoc_bssid == NULL) 4408 return -1; 4409 } else 4410 p2p->wfd_assoc_bssid = NULL; 4411 4412 return 0; 4413} 4414 4415 4416int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p, 4417 const struct wpabuf *elem) 4418{ 4419 wpabuf_free(p2p->wfd_coupled_sink_info); 4420 if (elem) { 4421 p2p->wfd_coupled_sink_info = wpabuf_dup(elem); 4422 if (p2p->wfd_coupled_sink_info == NULL) 4423 return -1; 4424 } else 4425 p2p->wfd_coupled_sink_info = NULL; 4426 4427 return 0; 4428} 4429 4430#endif /* CONFIG_WIFI_DISPLAY */ 4431 4432 4433int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int, 4434 int max_disc_tu) 4435{ 4436 if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0) 4437 return -1; 4438 4439 p2p->min_disc_int = min_disc_int; 4440 p2p->max_disc_int = max_disc_int; 4441 p2p->max_disc_tu = max_disc_tu; 4442 p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d", 4443 min_disc_int, max_disc_int, max_disc_tu); 4444 4445 return 0; 4446} 4447 4448 4449void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...) 4450{ 4451 va_list ap; 4452 char buf[500]; 4453 4454 if (!p2p->cfg->debug_print) 4455 return; 4456 4457 va_start(ap, fmt); 4458 vsnprintf(buf, sizeof(buf), fmt, ap); 4459 buf[sizeof(buf) - 1] = '\0'; 4460 va_end(ap); 4461 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf); 4462} 4463 4464 4465void p2p_info(struct p2p_data *p2p, const char *fmt, ...) 4466{ 4467 va_list ap; 4468 char buf[500]; 4469 4470 if (!p2p->cfg->debug_print) 4471 return; 4472 4473 va_start(ap, fmt); 4474 vsnprintf(buf, sizeof(buf), fmt, ap); 4475 buf[sizeof(buf) - 1] = '\0'; 4476 va_end(ap); 4477 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf); 4478} 4479 4480 4481void p2p_err(struct p2p_data *p2p, const char *fmt, ...) 4482{ 4483 va_list ap; 4484 char buf[500]; 4485 4486 if (!p2p->cfg->debug_print) 4487 return; 4488 4489 va_start(ap, fmt); 4490 vsnprintf(buf, sizeof(buf), fmt, ap); 4491 buf[sizeof(buf) - 1] = '\0'; 4492 va_end(ap); 4493 p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf); 4494} 4495 4496 4497#ifdef CONFIG_WPS_NFC 4498 4499static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p, 4500 int client_freq, 4501 const u8 *go_dev_addr, 4502 const u8 *ssid, size_t ssid_len) 4503{ 4504 struct wpabuf *buf; 4505 u8 op_class, channel; 4506 enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP; 4507 4508 buf = wpabuf_alloc(1000); 4509 if (buf == NULL) 4510 return NULL; 4511 4512 op_class = p2p->cfg->reg_class; 4513 channel = p2p->cfg->channel; 4514 4515 p2p_buf_add_capability(buf, p2p->dev_capab & 4516 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 4517 p2p_buf_add_device_info(buf, p2p, NULL); 4518 4519 if (p2p->num_groups > 0) { 4520 int freq = p2p_group_get_freq(p2p->groups[0]); 4521 role = P2P_GO_IN_A_GROUP; 4522 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) { 4523 p2p_dbg(p2p, 4524 "Unknown GO operating frequency %d MHz for NFC handover", 4525 freq); 4526 wpabuf_free(buf); 4527 return NULL; 4528 } 4529 } else if (client_freq > 0) { 4530 role = P2P_CLIENT_IN_A_GROUP; 4531 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) { 4532 p2p_dbg(p2p, 4533 "Unknown client operating frequency %d MHz for NFC handover", 4534 client_freq); 4535 wpabuf_free(buf); 4536 return NULL; 4537 } 4538 } 4539 4540 p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class, 4541 channel, role); 4542 4543 if (p2p->num_groups > 0) { 4544 /* Limit number of clients to avoid very long message */ 4545 p2p_buf_add_group_info(p2p->groups[0], buf, 5); 4546 p2p_group_buf_add_id(p2p->groups[0], buf); 4547 } else if (client_freq > 0 && 4548 go_dev_addr && !is_zero_ether_addr(go_dev_addr) && 4549 ssid && ssid_len > 0) { 4550 /* 4551 * Add the optional P2P Group ID to indicate in which group this 4552 * device is a P2P Client. 4553 */ 4554 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len); 4555 } 4556 4557 return buf; 4558} 4559 4560 4561struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p, 4562 int client_freq, 4563 const u8 *go_dev_addr, 4564 const u8 *ssid, size_t ssid_len) 4565{ 4566 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 4567 ssid_len); 4568} 4569 4570 4571struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p, 4572 int client_freq, 4573 const u8 *go_dev_addr, 4574 const u8 *ssid, size_t ssid_len) 4575{ 4576 return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid, 4577 ssid_len); 4578} 4579 4580 4581int p2p_process_nfc_connection_handover(struct p2p_data *p2p, 4582 struct p2p_nfc_params *params) 4583{ 4584 struct p2p_message msg; 4585 struct p2p_device *dev; 4586 const u8 *p2p_dev_addr; 4587 int freq; 4588 enum p2p_role_indication role; 4589 4590 params->next_step = NO_ACTION; 4591 4592 if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len, 4593 params->p2p_attr, params->p2p_len, &msg)) { 4594 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC"); 4595 p2p_parse_free(&msg); 4596 return -1; 4597 } 4598 4599 if (msg.p2p_device_addr) 4600 p2p_dev_addr = msg.p2p_device_addr; 4601 else if (msg.device_id) 4602 p2p_dev_addr = msg.device_id; 4603 else { 4604 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id"); 4605 p2p_parse_free(&msg); 4606 return -1; 4607 } 4608 4609 if (msg.oob_dev_password) { 4610 os_memcpy(params->oob_dev_pw, msg.oob_dev_password, 4611 msg.oob_dev_password_len); 4612 params->oob_dev_pw_len = msg.oob_dev_password_len; 4613 } 4614 4615 dev = p2p_create_device(p2p, p2p_dev_addr); 4616 if (dev == NULL) { 4617 p2p_parse_free(&msg); 4618 return -1; 4619 } 4620 4621 params->peer = &dev->info; 4622 4623 os_get_reltime(&dev->last_seen); 4624 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 4625 p2p_copy_wps_info(p2p, dev, 0, &msg); 4626 4627 if (!msg.oob_go_neg_channel) { 4628 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included"); 4629 return -1; 4630 } 4631 4632 if (msg.oob_go_neg_channel[3] == 0 && 4633 msg.oob_go_neg_channel[4] == 0) 4634 freq = 0; 4635 else 4636 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3], 4637 msg.oob_go_neg_channel[4]); 4638 if (freq < 0) { 4639 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel"); 4640 return -1; 4641 } 4642 role = msg.oob_go_neg_channel[5]; 4643 4644 if (role == P2P_GO_IN_A_GROUP) { 4645 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq); 4646 params->go_freq = freq; 4647 } else if (role == P2P_CLIENT_IN_A_GROUP) { 4648 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz", 4649 freq); 4650 params->go_freq = freq; 4651 } else 4652 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq); 4653 dev->oob_go_neg_freq = freq; 4654 4655 if (!params->sel && role != P2P_GO_IN_A_GROUP) { 4656 freq = p2p_channel_to_freq(p2p->cfg->reg_class, 4657 p2p->cfg->channel); 4658 if (freq < 0) { 4659 p2p_dbg(p2p, "Own listen channel not known"); 4660 return -1; 4661 } 4662 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq); 4663 dev->oob_go_neg_freq = freq; 4664 } 4665 4666 if (msg.group_id) { 4667 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN); 4668 params->go_ssid_len = msg.group_id_len - ETH_ALEN; 4669 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN, 4670 params->go_ssid_len); 4671 } 4672 4673 if (dev->flags & P2P_DEV_USER_REJECTED) { 4674 p2p_dbg(p2p, "Do not report rejected device"); 4675 p2p_parse_free(&msg); 4676 return 0; 4677 } 4678 4679 if (!(dev->flags & P2P_DEV_REPORTED)) { 4680 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info, 4681 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 4682 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 4683 } 4684 p2p_parse_free(&msg); 4685 4686 if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0) 4687 params->next_step = BOTH_GO; 4688 else if (role == P2P_GO_IN_A_GROUP) 4689 params->next_step = JOIN_GROUP; 4690 else if (role == P2P_CLIENT_IN_A_GROUP) { 4691 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 4692 params->next_step = PEER_CLIENT; 4693 } else if (p2p->num_groups > 0) 4694 params->next_step = AUTH_JOIN; 4695 else if (params->sel) 4696 params->next_step = INIT_GO_NEG; 4697 else 4698 params->next_step = RESP_GO_NEG; 4699 4700 return 0; 4701} 4702 4703 4704void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id, 4705 int go_intent, 4706 const u8 *own_interface_addr) 4707{ 4708 4709 p2p->authorized_oob_dev_pw_id = dev_pw_id; 4710 if (dev_pw_id == 0) { 4711 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover"); 4712 return; 4713 } 4714 4715 p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover", 4716 dev_pw_id); 4717 4718 p2p->go_intent = go_intent; 4719 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 4720} 4721 4722#endif /* CONFIG_WPS_NFC */ 4723 4724 4725int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len) 4726{ 4727 if (len < 8 || len > 63) 4728 return -1; 4729 p2p->cfg->passphrase_len = len; 4730 return 0; 4731} 4732