p2p.c revision 04949598a23f501be6eec21697465fd46a28840a
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 "common/wpa_ctrl.h" 16#include "wps/wps_i.h" 17#include "p2p_i.h" 18#include "p2p.h" 19 20 21static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx); 22static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev); 23static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 24 const u8 *sa, const u8 *data, size_t len, 25 int rx_freq); 26static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 27 const u8 *sa, const u8 *data, 28 size_t len); 29static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx); 30static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx); 31 32 33/* 34 * p2p_scan recovery timeout 35 * 36 * Many drivers are using 30 second timeout on scan results. Allow a bit larger 37 * timeout for this to avoid hitting P2P timeout unnecessarily. 38 */ 39#define P2P_SCAN_TIMEOUT 35 40 41/** 42 * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer 43 * entries will be removed 44 */ 45#ifdef ANDROID_P2P 46#define P2P_PEER_EXPIRATION_AGE 30 47#else 48#define P2P_PEER_EXPIRATION_AGE 300 49#endif 50 51#define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2) 52 53#ifdef ANDROID_P2P 54int p2p_connection_in_progress(struct p2p_data *p2p) 55{ 56 int ret = 0; 57 58 switch (p2p->state) { 59 case P2P_CONNECT: 60 case P2P_CONNECT_LISTEN: 61 case P2P_GO_NEG: 62 case P2P_WAIT_PEER_CONNECT: 63 case P2P_WAIT_PEER_IDLE: 64 case P2P_PROVISIONING: 65 case P2P_INVITE: 66 case P2P_INVITE_LISTEN: 67 ret = 1; 68 break; 69 70 default: 71 wpa_printf(MSG_DEBUG, "p2p_connection_in_progress state %d", p2p->state); 72 ret = 0; 73 } 74 75 return ret; 76} 77#endif 78 79static void p2p_expire_peers(struct p2p_data *p2p) 80{ 81 struct p2p_device *dev, *n; 82 struct os_time now; 83 size_t i; 84 85 os_get_time(&now); 86 dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) { 87 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec) 88 continue; 89 90 if (p2p->cfg->go_connected && 91 p2p->cfg->go_connected(p2p->cfg->cb_ctx, 92 dev->info.p2p_device_addr)) { 93 /* 94 * We are connected as a client to a group in which the 95 * peer is the GO, so do not expire the peer entry. 96 */ 97 os_get_time(&dev->last_seen); 98 continue; 99 } 100 101 for (i = 0; i < p2p->num_groups; i++) { 102 if (p2p_group_is_client_connected( 103 p2p->groups[i], dev->info.p2p_device_addr)) 104 break; 105 } 106 if (i < p2p->num_groups) { 107 /* 108 * The peer is connected as a client in a group where 109 * we are the GO, so do not expire the peer entry. 110 */ 111 os_get_time(&dev->last_seen); 112 continue; 113 } 114 115#ifdef ANDROID_P2P 116 /* If Connection is in progress, don't expire the peer 117 */ 118 if (p2p_connection_in_progress(p2p)) 119 continue; 120#endif 121 122 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Expiring old peer " 123 "entry " MACSTR, MAC2STR(dev->info.p2p_device_addr)); 124#ifdef ANDROID_P2P 125 /* SD_FAIR_POLICY: Update the current sd_dev_list pointer to next device */ 126 if(&dev->list == p2p->sd_dev_list) 127 p2p->sd_dev_list = dev->list.next; 128#endif 129 dl_list_del(&dev->list); 130 p2p_device_free(p2p, dev); 131 } 132} 133 134 135static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx) 136{ 137 struct p2p_data *p2p = eloop_ctx; 138 p2p_expire_peers(p2p); 139 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 140 p2p_expiration_timeout, p2p, NULL); 141} 142 143 144static const char * p2p_state_txt(int state) 145{ 146 switch (state) { 147 case P2P_IDLE: 148 return "IDLE"; 149 case P2P_SEARCH: 150 return "SEARCH"; 151 case P2P_CONNECT: 152 return "CONNECT"; 153 case P2P_CONNECT_LISTEN: 154 return "CONNECT_LISTEN"; 155 case P2P_GO_NEG: 156 return "GO_NEG"; 157 case P2P_LISTEN_ONLY: 158 return "LISTEN_ONLY"; 159 case P2P_WAIT_PEER_CONNECT: 160 return "WAIT_PEER_CONNECT"; 161 case P2P_WAIT_PEER_IDLE: 162 return "WAIT_PEER_IDLE"; 163 case P2P_SD_DURING_FIND: 164 return "SD_DURING_FIND"; 165 case P2P_PROVISIONING: 166 return "PROVISIONING"; 167 case P2P_PD_DURING_FIND: 168 return "PD_DURING_FIND"; 169 case P2P_INVITE: 170 return "INVITE"; 171 case P2P_INVITE_LISTEN: 172 return "INVITE_LISTEN"; 173 case P2P_SEARCH_WHEN_READY: 174 return "SEARCH_WHEN_READY"; 175 default: 176 return "?"; 177 } 178} 179 180 181u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr) 182{ 183 struct p2p_device *dev = NULL; 184 185 if (!addr || !p2p) 186 return 0; 187 188 dev = p2p_get_device(p2p, addr); 189 if (dev) 190 return dev->wps_prov_info; 191 else 192 return 0; 193} 194 195 196void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr) 197{ 198 struct p2p_device *dev = NULL; 199 200 if (!addr || !p2p) 201 return; 202 203 dev = p2p_get_device(p2p, addr); 204 if (dev) 205 dev->wps_prov_info = 0; 206} 207 208 209void p2p_set_state(struct p2p_data *p2p, int new_state) 210{ 211 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: State %s -> %s", 212 p2p_state_txt(p2p->state), p2p_state_txt(new_state)); 213 p2p->state = new_state; 214} 215 216 217void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec) 218{ 219 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 220 "P2P: Set timeout (state=%s): %u.%06u sec", 221 p2p_state_txt(p2p->state), sec, usec); 222 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 223 eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL); 224} 225 226 227void p2p_clear_timeout(struct p2p_data *p2p) 228{ 229 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Clear timeout (state=%s)", 230 p2p_state_txt(p2p->state)); 231 eloop_cancel_timeout(p2p_state_timeout, p2p, NULL); 232} 233 234 235void p2p_go_neg_failed(struct p2p_data *p2p, struct p2p_device *peer, 236 int status) 237{ 238 struct p2p_go_neg_results res; 239 p2p_clear_timeout(p2p); 240 p2p_set_state(p2p, P2P_IDLE); 241 if (p2p->go_neg_peer) 242 p2p->go_neg_peer->wps_method = WPS_NOT_READY; 243 p2p->go_neg_peer = NULL; 244 245 os_memset(&res, 0, sizeof(res)); 246 res.status = status; 247 if (peer) { 248 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, 249 ETH_ALEN); 250 os_memcpy(res.peer_interface_addr, peer->intended_addr, 251 ETH_ALEN); 252 } 253 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 254} 255 256 257static void p2p_listen_in_find(struct p2p_data *p2p) 258{ 259 unsigned int r, tu; 260 int freq; 261 struct wpabuf *ies; 262 263 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 264 "P2P: Starting short listen state (state=%s)", 265 p2p_state_txt(p2p->state)); 266 267 freq = p2p_channel_to_freq(p2p->cfg->country, p2p->cfg->reg_class, 268 p2p->cfg->channel); 269 if (freq < 0) { 270 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 271 "P2P: Unknown regulatory class/channel"); 272 return; 273 } 274 275 os_get_random((u8 *) &r, sizeof(r)); 276 tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) + 277 p2p->min_disc_int) * 100; 278 279 p2p->pending_listen_freq = freq; 280 p2p->pending_listen_sec = 0; 281 p2p->pending_listen_usec = 1024 * tu; 282 283 ies = p2p_build_probe_resp_ies(p2p); 284 if (ies == NULL) 285 return; 286 287 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000, 288 ies) < 0) { 289 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 290 "P2P: Failed to start listen mode"); 291 p2p->pending_listen_freq = 0; 292 } 293 wpabuf_free(ies); 294} 295 296 297int p2p_listen(struct p2p_data *p2p, unsigned int timeout) 298{ 299 int freq; 300 struct wpabuf *ies; 301 302 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 303 "P2P: Going to listen(only) state"); 304 305 freq = p2p_channel_to_freq(p2p->cfg->country, p2p->cfg->reg_class, 306 p2p->cfg->channel); 307 if (freq < 0) { 308 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 309 "P2P: Unknown regulatory class/channel"); 310 return -1; 311 } 312 313 p2p->pending_listen_freq = freq; 314 p2p->pending_listen_sec = timeout / 1000; 315 p2p->pending_listen_usec = (timeout % 1000) * 1000; 316 317 if (p2p->p2p_scan_running) { 318 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) { 319 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 320 "P2P: p2p_scan running - connect is already " 321 "pending - skip listen"); 322 return 0; 323 } 324 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 325 "P2P: p2p_scan running - delay start of listen state"); 326 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN; 327 return 0; 328 } 329 330 ies = p2p_build_probe_resp_ies(p2p); 331 if (ies == NULL) 332 return -1; 333 334 if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) { 335 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 336 "P2P: Failed to start listen mode"); 337 p2p->pending_listen_freq = 0; 338 wpabuf_free(ies); 339 return -1; 340 } 341 wpabuf_free(ies); 342 343 p2p_set_state(p2p, P2P_LISTEN_ONLY); 344 345 return 0; 346} 347 348 349static void p2p_device_clear_reported(struct p2p_data *p2p) 350{ 351 struct p2p_device *dev; 352 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) 353 dev->flags &= ~P2P_DEV_REPORTED; 354} 355 356 357/** 358 * p2p_get_device - Fetch a peer entry 359 * @p2p: P2P module context from p2p_init() 360 * @addr: P2P Device Address of the peer 361 * Returns: Pointer to the device entry or %NULL if not found 362 */ 363struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr) 364{ 365 struct p2p_device *dev; 366 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 367 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0) 368 return dev; 369 } 370 return NULL; 371} 372 373 374/** 375 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address 376 * @p2p: P2P module context from p2p_init() 377 * @addr: P2P Interface Address of the peer 378 * Returns: Pointer to the device entry or %NULL if not found 379 */ 380struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p, 381 const u8 *addr) 382{ 383 struct p2p_device *dev; 384 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 385 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0) 386 return dev; 387 } 388 return NULL; 389} 390 391 392/** 393 * p2p_create_device - Create a peer entry 394 * @p2p: P2P module context from p2p_init() 395 * @addr: P2P Device Address of the peer 396 * Returns: Pointer to the device entry or %NULL on failure 397 * 398 * If there is already an entry for the peer, it will be returned instead of 399 * creating a new one. 400 */ 401static struct p2p_device * p2p_create_device(struct p2p_data *p2p, 402 const u8 *addr) 403{ 404 struct p2p_device *dev, *oldest = NULL; 405 size_t count = 0; 406 407 dev = p2p_get_device(p2p, addr); 408 if (dev) 409 return dev; 410 411 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 412 count++; 413 if (oldest == NULL || 414 os_time_before(&dev->last_seen, &oldest->last_seen)) 415 oldest = dev; 416 } 417 if (count + 1 > p2p->cfg->max_peers && oldest) { 418 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 419 "P2P: Remove oldest peer entry to make room for a new " 420 "peer"); 421#ifdef ANDROID_P2P 422 /* SD_FAIR_POLICY: Update the current sd_dev_list pointer to next device */ 423 if(&oldest->list == p2p->sd_dev_list) 424 p2p->sd_dev_list = oldest->list.next; 425#endif 426 dl_list_del(&oldest->list); 427 p2p_device_free(p2p, oldest); 428 } 429 430 dev = os_zalloc(sizeof(*dev)); 431 if (dev == NULL) 432 return NULL; 433 dl_list_add(&p2p->devices, &dev->list); 434 os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN); 435 436 return dev; 437} 438 439 440static void p2p_copy_client_info(struct p2p_device *dev, 441 struct p2p_client_info *cli) 442{ 443 os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len); 444 dev->info.device_name[cli->dev_name_len] = '\0'; 445 dev->info.dev_capab = cli->dev_capab; 446 dev->info.config_methods = cli->config_methods; 447 os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8); 448 dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types; 449 os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types, 450 dev->info.wps_sec_dev_type_list_len); 451} 452 453 454static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr, 455 const u8 *go_interface_addr, int freq, 456 const u8 *gi, size_t gi_len) 457{ 458 struct p2p_group_info info; 459 size_t c; 460 struct p2p_device *dev; 461 462 if (gi == NULL) 463 return 0; 464 465 if (p2p_group_info_parse(gi, gi_len, &info) < 0) 466 return -1; 467 468 /* 469 * Clear old data for this group; if the devices are still in the 470 * group, the information will be restored in the loop following this. 471 */ 472 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 473 if (os_memcmp(dev->member_in_go_iface, go_interface_addr, 474 ETH_ALEN) == 0) { 475 os_memset(dev->member_in_go_iface, 0, ETH_ALEN); 476 os_memset(dev->member_in_go_dev, 0, ETH_ALEN); 477 } 478 } 479 480 for (c = 0; c < info.num_clients; c++) { 481 struct p2p_client_info *cli = &info.client[c]; 482 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr, 483 ETH_ALEN) == 0) 484 continue; /* ignore our own entry */ 485 dev = p2p_get_device(p2p, cli->p2p_device_addr); 486 if (dev) { 487 if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY | 488 P2P_DEV_PROBE_REQ_ONLY)) { 489 /* 490 * Update information since we have not 491 * received this directly from the client. 492 */ 493 p2p_copy_client_info(dev, cli); 494 } else { 495 /* 496 * Need to update P2P Client Discoverability 497 * flag since it is valid only in P2P Group 498 * Info attribute. 499 */ 500 dev->info.dev_capab &= 501 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 502 dev->info.dev_capab |= 503 cli->dev_capab & 504 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 505 } 506 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 507 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 508 } 509 } else { 510 dev = p2p_create_device(p2p, cli->p2p_device_addr); 511 if (dev == NULL) 512 continue; 513 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY; 514 p2p_copy_client_info(dev, cli); 515 dev->oper_freq = freq; 516 p2p->cfg->dev_found(p2p->cfg->cb_ctx, 517 dev->info.p2p_device_addr, 518 &dev->info, 1); 519 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 520 } 521 522 os_memcpy(dev->interface_addr, cli->p2p_interface_addr, 523 ETH_ALEN); 524 os_get_time(&dev->last_seen); 525 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN); 526 os_memcpy(dev->member_in_go_iface, go_interface_addr, 527 ETH_ALEN); 528 } 529 530 return 0; 531} 532 533 534static void p2p_copy_wps_info(struct p2p_device *dev, int probe_req, 535 const struct p2p_message *msg) 536{ 537 os_memcpy(dev->info.device_name, msg->device_name, 538 sizeof(dev->info.device_name)); 539 540 if (msg->manufacturer && 541 msg->manufacturer_len < sizeof(dev->info.manufacturer)) { 542 os_memset(dev->info.manufacturer, 0, 543 sizeof(dev->info.manufacturer)); 544 os_memcpy(dev->info.manufacturer, msg->manufacturer, 545 msg->manufacturer_len); 546 } 547 548 if (msg->model_name && 549 msg->model_name_len < sizeof(dev->info.model_name)) { 550 os_memset(dev->info.model_name, 0, 551 sizeof(dev->info.model_name)); 552 os_memcpy(dev->info.model_name, msg->model_name, 553 msg->model_name_len); 554 } 555 556 if (msg->model_number && 557 msg->model_number_len < sizeof(dev->info.model_number)) { 558 os_memset(dev->info.model_number, 0, 559 sizeof(dev->info.model_number)); 560 os_memcpy(dev->info.model_number, msg->model_number, 561 msg->model_number_len); 562 } 563 564 if (msg->serial_number && 565 msg->serial_number_len < sizeof(dev->info.serial_number)) { 566 os_memset(dev->info.serial_number, 0, 567 sizeof(dev->info.serial_number)); 568 os_memcpy(dev->info.serial_number, msg->serial_number, 569 msg->serial_number_len); 570 } 571 572 if (msg->pri_dev_type) 573 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type, 574 sizeof(dev->info.pri_dev_type)); 575 else if (msg->wps_pri_dev_type) 576 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type, 577 sizeof(dev->info.pri_dev_type)); 578 579 if (msg->wps_sec_dev_type_list) { 580 os_memcpy(dev->info.wps_sec_dev_type_list, 581 msg->wps_sec_dev_type_list, 582 msg->wps_sec_dev_type_list_len); 583 dev->info.wps_sec_dev_type_list_len = 584 msg->wps_sec_dev_type_list_len; 585 } 586 587 if (msg->capability) { 588 /* 589 * P2P Client Discoverability bit is reserved in all frames 590 * that use this function, so do not change its value here. 591 */ 592 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 593 dev->info.dev_capab |= msg->capability[0] & 594 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 595 dev->info.group_capab = msg->capability[1]; 596 } 597 598 if (msg->ext_listen_timing) { 599 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing); 600 dev->ext_listen_interval = 601 WPA_GET_LE16(msg->ext_listen_timing + 2); 602 } 603 604 if (!probe_req) { 605 dev->info.config_methods = msg->config_methods ? 606 msg->config_methods : msg->wps_config_methods; 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 * @ies: IEs from the Beacon or Probe Response frame 619 * @ies_len: Length of ies buffer in octets 620 * @scan_res: Whether this was based on scan results 621 * Returns: 0 on success, -1 on failure 622 * 623 * If the scan result is for a GO, the clients in the group will also be added 624 * to the peer table. This function can also be used with some other frames 625 * like Provision Discovery Request that contains P2P Capability and P2P Device 626 * Info attributes. 627 */ 628int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq, int level, 629 const u8 *ies, size_t ies_len, int scan_res) 630{ 631 struct p2p_device *dev; 632 struct p2p_message msg; 633 const u8 *p2p_dev_addr; 634 int i; 635 636 os_memset(&msg, 0, sizeof(msg)); 637 if (p2p_parse_ies(ies, ies_len, &msg)) { 638 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 639 "P2P: Failed to parse P2P IE for a device entry"); 640 p2p_parse_free(&msg); 641 return -1; 642 } 643 644 if (msg.p2p_device_addr) 645 p2p_dev_addr = msg.p2p_device_addr; 646 else if (msg.device_id) 647 p2p_dev_addr = msg.device_id; 648 else { 649 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 650 "P2P: Ignore scan data without P2P Device Info or " 651 "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 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Do not add peer " 659 "filter for " MACSTR " due to peer filter", 660 MAC2STR(p2p_dev_addr)); 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 os_get_time(&dev->last_seen); 670 dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY); 671 672 if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0) 673 os_memcpy(dev->interface_addr, addr, ETH_ALEN); 674 if (msg.ssid && 675 (msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 676 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 677 != 0)) { 678 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]); 679 dev->oper_ssid_len = msg.ssid[1]; 680 } 681 682 if (freq >= 2412 && freq <= 2484 && msg.ds_params && 683 *msg.ds_params >= 1 && *msg.ds_params <= 14) { 684 int ds_freq; 685 if (*msg.ds_params == 14) 686 ds_freq = 2484; 687 else 688 ds_freq = 2407 + *msg.ds_params * 5; 689 if (freq != ds_freq) { 690 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 691 "P2P: Update Listen frequency based on DS " 692 "Parameter Set IE: %d -> %d MHz", 693 freq, ds_freq); 694 freq = ds_freq; 695 } 696 } 697 698 if (dev->listen_freq && dev->listen_freq != freq && scan_res) { 699 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 700 "P2P: Update Listen frequency based on scan " 701 "results (" MACSTR " %d -> %d MHz (DS param %d)", 702 MAC2STR(dev->info.p2p_device_addr), dev->listen_freq, 703 freq, msg.ds_params ? *msg.ds_params : -1); 704 } 705 if (scan_res) { 706 dev->listen_freq = freq; 707 if (msg.group_info) 708 dev->oper_freq = freq; 709 } 710 dev->info.level = level; 711 712 p2p_copy_wps_info(dev, 0, &msg); 713 714 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 715 wpabuf_free(dev->info.wps_vendor_ext[i]); 716 dev->info.wps_vendor_ext[i] = NULL; 717 } 718 719 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 720 if (msg.wps_vendor_ext[i] == NULL) 721 break; 722 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy( 723 msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]); 724 if (dev->info.wps_vendor_ext[i] == NULL) 725 break; 726 } 727 728 if (scan_res) { 729 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq, 730 msg.group_info, msg.group_info_len); 731 } 732 733 p2p_parse_free(&msg); 734 735 if (p2p_pending_sd_req(p2p, dev)) 736 dev->flags |= P2P_DEV_SD_SCHEDULE; 737 738 if (dev->flags & P2P_DEV_REPORTED) 739 return 0; 740 741 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 742 "P2P: Peer found with Listen frequency %d MHz", freq); 743 if (dev->flags & P2P_DEV_USER_REJECTED) { 744 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 745 "P2P: Do not report rejected device"); 746 return 0; 747 } 748 749 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 750 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 751 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 752 753 return 0; 754} 755 756 757static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev) 758{ 759 int i; 760 761 if (p2p->go_neg_peer == dev) { 762 /* 763 * If GO Negotiation is in progress, report that it has failed. 764 */ 765 p2p_go_neg_failed(p2p, dev, -1); 766 p2p->go_neg_peer = NULL; 767 } 768 if (p2p->invite_peer == dev) 769 p2p->invite_peer = NULL; 770 if (p2p->sd_peer == dev) 771 p2p->sd_peer = NULL; 772 if (p2p->pending_client_disc_go == dev) 773 p2p->pending_client_disc_go = NULL; 774 775 /* dev_lost() device, but only if it was previously dev_found() */ 776 if (dev->flags & P2P_DEV_REPORTED_ONCE) 777 p2p->cfg->dev_lost(p2p->cfg->cb_ctx, 778 dev->info.p2p_device_addr); 779 780 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 781 wpabuf_free(dev->info.wps_vendor_ext[i]); 782 dev->info.wps_vendor_ext[i] = NULL; 783 } 784 785 os_free(dev); 786} 787 788 789static int p2p_get_next_prog_freq(struct p2p_data *p2p) 790{ 791 struct p2p_channels *c; 792 struct p2p_reg_class *cla; 793 size_t cl, ch; 794 int found = 0; 795 u8 reg_class; 796 u8 channel; 797 int freq; 798 799 c = &p2p->cfg->channels; 800 for (cl = 0; cl < c->reg_classes; cl++) { 801 cla = &c->reg_class[cl]; 802 if (cla->reg_class != p2p->last_prog_scan_class) 803 continue; 804 for (ch = 0; ch < cla->channels; ch++) { 805 if (cla->channel[ch] == p2p->last_prog_scan_chan) { 806 found = 1; 807 break; 808 } 809 } 810 if (found) 811 break; 812 } 813 814 if (!found) { 815 /* Start from beginning */ 816 reg_class = c->reg_class[0].reg_class; 817 channel = c->reg_class[0].channel[0]; 818 } else { 819 /* Pick the next channel */ 820 ch++; 821 if (ch == cla->channels) { 822 cl++; 823 if (cl == c->reg_classes) 824 cl = 0; 825 ch = 0; 826 } 827 reg_class = c->reg_class[cl].reg_class; 828 channel = c->reg_class[cl].channel[ch]; 829 } 830 831 freq = p2p_channel_to_freq(p2p->cfg->country, reg_class, channel); 832 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Next progressive search " 833 "channel: reg_class %u channel %u -> %d MHz", 834 reg_class, channel, freq); 835 p2p->last_prog_scan_class = reg_class; 836 p2p->last_prog_scan_chan = channel; 837 838 if (freq == 2412 || freq == 2437 || freq == 2462) 839 return 0; /* No need to add social channels */ 840 return freq; 841} 842 843 844static void p2p_search(struct p2p_data *p2p) 845{ 846 int freq = 0; 847 enum p2p_scan_type type; 848 u16 pw_id = DEV_PW_DEFAULT; 849 850 if (p2p->drv_in_listen) { 851 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Driver is still " 852 "in Listen state - wait for it to end before " 853 "continuing"); 854 return; 855 } 856 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 857 858 if (p2p->find_type == P2P_FIND_PROGRESSIVE && 859 (freq = p2p_get_next_prog_freq(p2p)) > 0) { 860 type = P2P_SCAN_SOCIAL_PLUS_ONE; 861 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting search " 862 "(+ freq %u)", freq); 863 } else { 864 type = P2P_SCAN_SOCIAL; 865 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting search"); 866 } 867 868 if (p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq, 869 p2p->num_req_dev_types, p2p->req_dev_types, 870 p2p->find_dev_id, pw_id)) { 871 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 872 "P2P: Scan request failed"); 873 p2p_continue_find(p2p); 874 } else { 875 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Running p2p_scan"); 876 p2p->p2p_scan_running = 1; 877 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 878 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 879 p2p, NULL); 880 } 881} 882 883 884static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx) 885{ 886 struct p2p_data *p2p = eloop_ctx; 887 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Find timeout -> stop"); 888 p2p_stop_find(p2p); 889} 890 891 892static int p2p_run_after_scan(struct p2p_data *p2p) 893{ 894 struct p2p_device *dev; 895 enum p2p_after_scan op; 896 897 if (p2p->after_scan_tx) { 898 /* TODO: schedule p2p_run_after_scan to be called from TX 899 * status callback(?) */ 900 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Send pending " 901 "Action frame at p2p_scan completion"); 902 p2p->cfg->send_action(p2p->cfg->cb_ctx, 903 p2p->after_scan_tx->freq, 904 p2p->after_scan_tx->dst, 905 p2p->after_scan_tx->src, 906 p2p->after_scan_tx->bssid, 907 (u8 *) (p2p->after_scan_tx + 1), 908 p2p->after_scan_tx->len, 909 p2p->after_scan_tx->wait_time); 910 os_free(p2p->after_scan_tx); 911 p2p->after_scan_tx = NULL; 912#ifdef ANDROID_P2P 913 /* For SD frames, there is a scenario, where we can receive a SD request frame during p2p_scan. 914 * At that moment, we will send the SD response from this context. After sending the SD response, 915 * we need to continue p2p_find. But if we return 1 from here, p2p_find is going to be stopped. 916 */ 917 return 0; 918#else 919 return 1; 920#endif 921 } 922 923 op = p2p->start_after_scan; 924 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 925 switch (op) { 926 case P2P_AFTER_SCAN_NOTHING: 927 break; 928 case P2P_AFTER_SCAN_LISTEN: 929 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Start previously " 930 "requested Listen state"); 931 p2p_listen(p2p, p2p->pending_listen_sec * 1000 + 932 p2p->pending_listen_usec / 1000); 933 return 1; 934 case P2P_AFTER_SCAN_CONNECT: 935 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Start previously " 936 "requested connect with " MACSTR, 937 MAC2STR(p2p->after_scan_peer)); 938 dev = p2p_get_device(p2p, p2p->after_scan_peer); 939 if (dev == NULL) { 940 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer not " 941 "known anymore"); 942 break; 943 } 944 p2p_connect_send(p2p, dev); 945 return 1; 946 } 947 948 return 0; 949} 950 951 952static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx) 953{ 954 struct p2p_data *p2p = eloop_ctx; 955 int running; 956 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan timeout " 957 "(running=%d)", p2p->p2p_scan_running); 958 running = p2p->p2p_scan_running; 959 /* Make sure we recover from missed scan results callback */ 960 p2p->p2p_scan_running = 0; 961 962 if (running) 963 p2p_run_after_scan(p2p); 964} 965 966 967static void p2p_free_req_dev_types(struct p2p_data *p2p) 968{ 969 p2p->num_req_dev_types = 0; 970 os_free(p2p->req_dev_types); 971 p2p->req_dev_types = NULL; 972} 973 974 975int p2p_find(struct p2p_data *p2p, unsigned int timeout, 976 enum p2p_discovery_type type, 977 unsigned int num_req_dev_types, const u8 *req_dev_types, 978 const u8 *dev_id) 979{ 980 int res; 981 982 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting find (type=%d)", 983 type); 984 if (p2p->p2p_scan_running) { 985 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan is " 986 "already running"); 987 } 988 989 p2p_free_req_dev_types(p2p); 990 if (req_dev_types && num_req_dev_types) { 991 p2p->req_dev_types = os_malloc(num_req_dev_types * 992 WPS_DEV_TYPE_LEN); 993 if (p2p->req_dev_types == NULL) 994 return -1; 995 os_memcpy(p2p->req_dev_types, req_dev_types, 996 num_req_dev_types * WPS_DEV_TYPE_LEN); 997 p2p->num_req_dev_types = num_req_dev_types; 998 } 999 1000 if (dev_id) { 1001 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN); 1002 p2p->find_dev_id = p2p->find_dev_id_buf; 1003 } else 1004 p2p->find_dev_id = NULL; 1005 1006 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1007 p2p_clear_timeout(p2p); 1008 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1009 p2p->find_type = type; 1010 p2p_device_clear_reported(p2p); 1011 p2p_set_state(p2p, P2P_SEARCH); 1012 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1013 p2p->last_p2p_find_timeout = timeout; 1014 if (timeout) 1015 eloop_register_timeout(timeout, 0, p2p_find_timeout, 1016 p2p, NULL); 1017 switch (type) { 1018 case P2P_FIND_START_WITH_FULL: 1019 case P2P_FIND_PROGRESSIVE: 1020 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0, 1021 p2p->num_req_dev_types, 1022 p2p->req_dev_types, dev_id, 1023 DEV_PW_DEFAULT); 1024 break; 1025 case P2P_FIND_ONLY_SOCIAL: 1026 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0, 1027 p2p->num_req_dev_types, 1028 p2p->req_dev_types, dev_id, 1029 DEV_PW_DEFAULT); 1030 break; 1031 default: 1032 return -1; 1033 } 1034 1035 if (res == 0) { 1036 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Running p2p_scan"); 1037 p2p->p2p_scan_running = 1; 1038 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 1039 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout, 1040 p2p, NULL); 1041 } else if (res == 1) { 1042 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Could not start " 1043 "p2p_scan at this point - will try again after " 1044 "previous scan completes"); 1045 res = 0; 1046 p2p_set_state(p2p, P2P_SEARCH_WHEN_READY); 1047 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1048 } else { 1049 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Failed to start " 1050 "p2p_scan"); 1051 p2p_set_state(p2p, P2P_IDLE); 1052 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1053 } 1054 1055 return res; 1056} 1057 1058#ifdef ANDROID_P2P 1059int p2p_search_pending(struct p2p_data *p2p) 1060{ 1061 if(p2p == NULL) 1062 return 0; 1063 1064 if(p2p->state == P2P_SEARCH_WHEN_READY) 1065 return 1; 1066 1067 return 0; 1068} 1069#endif 1070 1071int p2p_other_scan_completed(struct p2p_data *p2p) 1072{ 1073 if (p2p->state != P2P_SEARCH_WHEN_READY) 1074 return 0; 1075 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting pending P2P find " 1076 "now that previous scan was completed"); 1077 if (p2p_find(p2p, p2p->last_p2p_find_timeout, p2p->find_type, 1078 p2p->num_req_dev_types, p2p->req_dev_types, 1079 p2p->find_dev_id) < 0) 1080 return 0; 1081 return 1; 1082} 1083 1084 1085void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq) 1086{ 1087 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Stopping find"); 1088 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL); 1089 p2p_clear_timeout(p2p); 1090 if (p2p->state == P2P_SEARCH) 1091 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, P2P_EVENT_FIND_STOPPED); 1092 p2p_set_state(p2p, P2P_IDLE); 1093 p2p_free_req_dev_types(p2p); 1094 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1095 p2p->go_neg_peer = NULL; 1096 p2p->sd_peer = NULL; 1097 p2p->invite_peer = NULL; 1098 p2p_stop_listen_for_freq(p2p, freq); 1099} 1100 1101 1102void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq) 1103{ 1104 if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) { 1105 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Skip stop_listen " 1106 "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 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Clear " 1120 "drv_in_listen (%d)", p2p->drv_in_listen); 1121 p2p->drv_in_listen = 0; 1122 } 1123 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1124} 1125 1126 1127void p2p_stop_find(struct p2p_data *p2p) 1128{ 1129 p2p_stop_find_for_freq(p2p, 0); 1130} 1131 1132 1133static int p2p_prepare_channel(struct p2p_data *p2p, unsigned int force_freq) 1134{ 1135 if (force_freq) { 1136 u8 op_reg_class, op_channel; 1137 if (p2p_freq_to_channel(p2p->cfg->country, force_freq, 1138 &op_reg_class, &op_channel) < 0) { 1139 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1140 "P2P: Unsupported frequency %u MHz", 1141 force_freq); 1142 return -1; 1143 } 1144 if (!p2p_channels_includes(&p2p->cfg->channels, op_reg_class, 1145 op_channel)) { 1146 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1147 "P2P: Frequency %u MHz (oper_class %u " 1148 "channel %u) not allowed for P2P", 1149 force_freq, op_reg_class, op_channel); 1150 return -1; 1151 } 1152 p2p->op_reg_class = op_reg_class; 1153 p2p->op_channel = op_channel; 1154 p2p->channels.reg_classes = 1; 1155 p2p->channels.reg_class[0].channels = 1; 1156 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 1157 p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 1158 } else { 1159 u8 op_reg_class, op_channel; 1160 1161 if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 && 1162 p2p_supported_freq(p2p, p2p->best_freq_overall) && 1163 p2p_freq_to_channel(p2p->cfg->country, 1164 p2p->best_freq_overall, 1165 &op_reg_class, &op_channel) == 0) { 1166 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1167 "P2P: Select best overall channel as " 1168 "operating channel preference"); 1169 p2p->op_reg_class = op_reg_class; 1170 p2p->op_channel = op_channel; 1171 } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 && 1172 p2p_supported_freq(p2p, p2p->best_freq_5) && 1173 p2p_freq_to_channel(p2p->cfg->country, 1174 p2p->best_freq_5, 1175 &op_reg_class, &op_channel) == 1176 0) { 1177 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1178 "P2P: Select best 5 GHz channel as " 1179 "operating channel preference"); 1180 p2p->op_reg_class = op_reg_class; 1181 p2p->op_channel = op_channel; 1182 } else if (!p2p->cfg->cfg_op_channel && 1183 p2p->best_freq_24 > 0 && 1184 p2p_supported_freq(p2p, p2p->best_freq_24) && 1185 p2p_freq_to_channel(p2p->cfg->country, 1186 p2p->best_freq_24, 1187 &op_reg_class, &op_channel) == 1188 0) { 1189 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1190 "P2P: Select best 2.4 GHz channel as " 1191 "operating channel preference"); 1192 p2p->op_reg_class = op_reg_class; 1193 p2p->op_channel = op_channel; 1194 } else { 1195 p2p->op_reg_class = p2p->cfg->op_reg_class; 1196 p2p->op_channel = p2p->cfg->op_channel; 1197 } 1198 1199 os_memcpy(&p2p->channels, &p2p->cfg->channels, 1200 sizeof(struct p2p_channels)); 1201 } 1202 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1203 "P2P: Own preference for operation channel: " 1204 "Operating Class %u Channel %u%s", 1205 p2p->op_reg_class, p2p->op_channel, 1206 force_freq ? " (forced)" : ""); 1207 1208 return 0; 1209} 1210 1211 1212static void p2p_set_dev_persistent(struct p2p_device *dev, 1213 int persistent_group) 1214{ 1215 switch (persistent_group) { 1216 case 0: 1217 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP | 1218 P2P_DEV_PREFER_PERSISTENT_RECONN); 1219 break; 1220 case 1: 1221 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP; 1222 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN; 1223 break; 1224 case 2: 1225 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP | 1226 P2P_DEV_PREFER_PERSISTENT_RECONN; 1227 break; 1228 } 1229} 1230 1231 1232int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr, 1233 enum p2p_wps_method wps_method, 1234 int go_intent, const u8 *own_interface_addr, 1235 unsigned int force_freq, int persistent_group, 1236 const u8 *force_ssid, size_t force_ssid_len, 1237 int pd_before_go_neg) 1238{ 1239 struct p2p_device *dev; 1240 1241 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1242 "P2P: Request to start group negotiation - peer=" MACSTR 1243 " GO Intent=%d Intended Interface Address=" MACSTR 1244 " wps_method=%d persistent_group=%d pd_before_go_neg=%d", 1245 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1246 wps_method, persistent_group, pd_before_go_neg); 1247 1248 if (p2p_prepare_channel(p2p, force_freq) < 0) 1249 return -1; 1250 1251 dev = p2p_get_device(p2p, peer_addr); 1252 if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 1253 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1254 "P2P: Cannot connect to unknown P2P Device " MACSTR, 1255 MAC2STR(peer_addr)); 1256 return -1; 1257 } 1258 1259 if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 1260 if (!(dev->info.dev_capab & 1261 P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 1262 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1263 "P2P: Cannot connect to P2P Device " MACSTR 1264 " that is in a group and is not discoverable", 1265 MAC2STR(peer_addr)); 1266 return -1; 1267 } 1268 if (dev->oper_freq <= 0) { 1269 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1270 "P2P: Cannot connect to P2P Device " MACSTR 1271 " with incomplete information", 1272 MAC2STR(peer_addr)); 1273 return -1; 1274 } 1275 1276 /* 1277 * First, try to connect directly. If the peer does not 1278 * acknowledge frames, assume it is sleeping and use device 1279 * discoverability via the GO at that point. 1280 */ 1281 } 1282 1283 p2p->ssid_set = 0; 1284 if (force_ssid) { 1285 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1286 force_ssid, force_ssid_len); 1287 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1288 p2p->ssid_len = force_ssid_len; 1289 p2p->ssid_set = 1; 1290 } 1291 1292 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1293 dev->flags &= ~P2P_DEV_USER_REJECTED; 1294 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 1295 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1296 if (pd_before_go_neg) 1297 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG; 1298 else 1299 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG; 1300 dev->connect_reqs = 0; 1301 dev->go_neg_req_sent = 0; 1302 dev->go_state = UNKNOWN_GO; 1303 p2p_set_dev_persistent(dev, persistent_group); 1304 p2p->go_intent = go_intent; 1305 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1306 1307 if (p2p->state != P2P_IDLE) 1308 p2p_stop_find(p2p); 1309 1310 if (p2p->after_scan_tx) { 1311 /* 1312 * We need to drop the pending frame to avoid issues with the 1313 * new GO Negotiation, e.g., when the pending frame was from a 1314 * previous attempt at starting a GO Negotiation. 1315 */ 1316 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Dropped " 1317 "previous pending Action frame TX that was waiting " 1318 "for p2p_scan completion"); 1319 os_free(p2p->after_scan_tx); 1320 p2p->after_scan_tx = NULL; 1321 } 1322 1323 dev->wps_method = wps_method; 1324 dev->status = P2P_SC_SUCCESS; 1325 1326 if (force_freq) 1327 dev->flags |= P2P_DEV_FORCE_FREQ; 1328 else 1329 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1330 1331 if (p2p->p2p_scan_running) { 1332 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1333 "P2P: p2p_scan running - delay connect send"); 1334 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT; 1335 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN); 1336 return 0; 1337 } 1338 p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING; 1339 1340 return p2p_connect_send(p2p, dev); 1341} 1342 1343 1344int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr, 1345 enum p2p_wps_method wps_method, 1346 int go_intent, const u8 *own_interface_addr, 1347 unsigned int force_freq, int persistent_group, 1348 const u8 *force_ssid, size_t force_ssid_len) 1349{ 1350 struct p2p_device *dev; 1351 1352 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1353 "P2P: Request to authorize group negotiation - peer=" MACSTR 1354 " GO Intent=%d Intended Interface Address=" MACSTR 1355 " wps_method=%d persistent_group=%d", 1356 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr), 1357 wps_method, persistent_group); 1358 1359 if (p2p_prepare_channel(p2p, force_freq) < 0) 1360 return -1; 1361 1362 dev = p2p_get_device(p2p, peer_addr); 1363 if (dev == NULL) { 1364 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1365 "P2P: Cannot authorize unknown P2P Device " MACSTR, 1366 MAC2STR(peer_addr)); 1367 return -1; 1368 } 1369 1370 p2p->ssid_set = 0; 1371 if (force_ssid) { 1372 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID", 1373 force_ssid, force_ssid_len); 1374 os_memcpy(p2p->ssid, force_ssid, force_ssid_len); 1375 p2p->ssid_len = force_ssid_len; 1376 p2p->ssid_set = 1; 1377 } 1378 1379 dev->flags &= ~P2P_DEV_NOT_YET_READY; 1380 dev->flags &= ~P2P_DEV_USER_REJECTED; 1381 dev->go_neg_req_sent = 0; 1382 dev->go_state = UNKNOWN_GO; 1383 p2p_set_dev_persistent(dev, persistent_group); 1384 p2p->go_intent = go_intent; 1385 os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN); 1386 1387 dev->wps_method = wps_method; 1388 dev->status = P2P_SC_SUCCESS; 1389 1390 if (force_freq) 1391 dev->flags |= P2P_DEV_FORCE_FREQ; 1392 else 1393 dev->flags &= ~P2P_DEV_FORCE_FREQ; 1394 1395 return 0; 1396} 1397 1398 1399void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr, 1400 struct p2p_device *dev, struct p2p_message *msg) 1401{ 1402 os_get_time(&dev->last_seen); 1403 1404 p2p_copy_wps_info(dev, 0, msg); 1405 1406 if (msg->listen_channel) { 1407 int freq; 1408 freq = p2p_channel_to_freq((char *) msg->listen_channel, 1409 msg->listen_channel[3], 1410 msg->listen_channel[4]); 1411 if (freq < 0) { 1412 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1413 "P2P: Unknown peer Listen channel: " 1414 "country=%c%c(0x%02x) reg_class=%u channel=%u", 1415 msg->listen_channel[0], 1416 msg->listen_channel[1], 1417 msg->listen_channel[2], 1418 msg->listen_channel[3], 1419 msg->listen_channel[4]); 1420 } else { 1421 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Update " 1422 "peer " MACSTR " Listen channel: %u -> %u MHz", 1423 MAC2STR(dev->info.p2p_device_addr), 1424 dev->listen_freq, freq); 1425 dev->listen_freq = freq; 1426 } 1427 } 1428 1429 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 1430 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY; 1431 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1432 "P2P: Completed device entry based on data from " 1433 "GO Negotiation Request"); 1434 } else { 1435 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1436 "P2P: Created device entry based on GO Neg Req: " 1437 MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' " 1438 "listen_freq=%d", 1439 MAC2STR(dev->info.p2p_device_addr), 1440 dev->info.dev_capab, dev->info.group_capab, 1441 dev->info.device_name, dev->listen_freq); 1442 } 1443 1444 dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY; 1445 1446 if (dev->flags & P2P_DEV_USER_REJECTED) { 1447 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1448 "P2P: Do not report rejected device"); 1449 return; 1450 } 1451 1452 p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info, 1453 !(dev->flags & P2P_DEV_REPORTED_ONCE)); 1454 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE; 1455} 1456 1457 1458void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len) 1459{ 1460 os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 1461 p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2); 1462 os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2], 1463 p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len); 1464 *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len; 1465} 1466 1467 1468int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params) 1469{ 1470 p2p_build_ssid(p2p, params->ssid, ¶ms->ssid_len); 1471 p2p_random(params->passphrase, 8); 1472 return 0; 1473} 1474 1475 1476void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer) 1477{ 1478 struct p2p_go_neg_results res; 1479 int go = peer->go_state == LOCAL_GO; 1480 struct p2p_channels intersection; 1481 int freqs; 1482 size_t i, j; 1483 1484 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1485 "P2P: GO Negotiation with " MACSTR " completed (%s will be " 1486 "GO)", MAC2STR(peer->info.p2p_device_addr), 1487 go ? "local end" : "peer"); 1488 1489 os_memset(&res, 0, sizeof(res)); 1490 res.role_go = go; 1491 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN); 1492 os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN); 1493 res.wps_method = peer->wps_method; 1494 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 1495 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 1496 res.persistent_group = 2; 1497 else 1498 res.persistent_group = 1; 1499 } 1500 1501 if (go) { 1502 /* Setup AP mode for WPS provisioning */ 1503 res.freq = p2p_channel_to_freq(p2p->cfg->country, 1504 p2p->op_reg_class, 1505 p2p->op_channel); 1506 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1507 res.ssid_len = p2p->ssid_len; 1508 p2p_random(res.passphrase, 8); 1509 } else { 1510 res.freq = peer->oper_freq; 1511 if (p2p->ssid_len) { 1512 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len); 1513 res.ssid_len = p2p->ssid_len; 1514 } 1515 } 1516 1517 p2p_channels_intersect(&p2p->channels, &peer->channels, 1518 &intersection); 1519 freqs = 0; 1520 for (i = 0; i < intersection.reg_classes; i++) { 1521 struct p2p_reg_class *c = &intersection.reg_class[i]; 1522 if (freqs + 1 == P2P_MAX_CHANNELS) 1523 break; 1524 for (j = 0; j < c->channels; j++) { 1525 int freq; 1526 if (freqs + 1 == P2P_MAX_CHANNELS) 1527 break; 1528 freq = p2p_channel_to_freq(peer->country, c->reg_class, 1529 c->channel[j]); 1530 if (freq < 0) 1531 continue; 1532 res.freq_list[freqs++] = freq; 1533 } 1534 } 1535 1536 res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout; 1537 1538 p2p_clear_timeout(p2p); 1539 p2p->ssid_set = 0; 1540 peer->go_neg_req_sent = 0; 1541 peer->wps_method = WPS_NOT_READY; 1542 1543 p2p_set_state(p2p, P2P_PROVISIONING); 1544 p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res); 1545} 1546 1547 1548static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa, 1549 const u8 *data, size_t len, int rx_freq) 1550{ 1551 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1552 "P2P: RX P2P Public Action from " MACSTR, MAC2STR(sa)); 1553 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len); 1554 1555 if (len < 1) 1556 return; 1557 1558 switch (data[0]) { 1559 case P2P_GO_NEG_REQ: 1560 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq); 1561 break; 1562 case P2P_GO_NEG_RESP: 1563 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq); 1564 break; 1565 case P2P_GO_NEG_CONF: 1566 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1); 1567 break; 1568 case P2P_INVITATION_REQ: 1569 p2p_process_invitation_req(p2p, sa, data + 1, len - 1, 1570 rx_freq); 1571 break; 1572 case P2P_INVITATION_RESP: 1573 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1); 1574 break; 1575 case P2P_PROV_DISC_REQ: 1576 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1577 break; 1578 case P2P_PROV_DISC_RESP: 1579 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1); 1580 break; 1581 case P2P_DEV_DISC_REQ: 1582 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq); 1583 break; 1584 case P2P_DEV_DISC_RESP: 1585 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1); 1586 break; 1587 default: 1588 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1589 "P2P: Unsupported P2P Public Action frame type %d", 1590 data[0]); 1591 break; 1592 } 1593} 1594 1595 1596static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da, 1597 const u8 *sa, const u8 *bssid, const u8 *data, 1598 size_t len, int freq) 1599{ 1600 if (len < 1) 1601 return; 1602 1603 switch (data[0]) { 1604 case WLAN_PA_VENDOR_SPECIFIC: 1605 data++; 1606 len--; 1607 if (len < 3) 1608 return; 1609 if (WPA_GET_BE24(data) != OUI_WFA) 1610 return; 1611 1612 data += 3; 1613 len -= 3; 1614 if (len < 1) 1615 return; 1616 1617 if (*data != P2P_OUI_TYPE) 1618 return; 1619 1620 p2p_rx_p2p_action(p2p, sa, data + 1, len - 1, freq); 1621 break; 1622 case WLAN_PA_GAS_INITIAL_REQ: 1623 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq); 1624 break; 1625 case WLAN_PA_GAS_INITIAL_RESP: 1626 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq); 1627 break; 1628 case WLAN_PA_GAS_COMEBACK_REQ: 1629 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq); 1630 break; 1631 case WLAN_PA_GAS_COMEBACK_RESP: 1632 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq); 1633 break; 1634 } 1635} 1636 1637 1638void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa, 1639 const u8 *bssid, u8 category, 1640 const u8 *data, size_t len, int freq) 1641{ 1642 if (category == WLAN_ACTION_PUBLIC) { 1643 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq); 1644 return; 1645 } 1646 1647 if (category != WLAN_ACTION_VENDOR_SPECIFIC) 1648 return; 1649 1650 if (len < 4) 1651 return; 1652 1653 if (WPA_GET_BE24(data) != OUI_WFA) 1654 return; 1655 data += 3; 1656 len -= 3; 1657 1658 if (*data != P2P_OUI_TYPE) 1659 return; 1660 data++; 1661 len--; 1662 1663 /* P2P action frame */ 1664 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1665 "P2P: RX P2P Action from " MACSTR, MAC2STR(sa)); 1666 wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len); 1667 1668 if (len < 1) 1669 return; 1670 switch (data[0]) { 1671 case P2P_NOA: 1672 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1673 "P2P: Received P2P Action - Notice of Absence"); 1674 /* TODO */ 1675 break; 1676 case P2P_PRESENCE_REQ: 1677 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq); 1678 break; 1679 case P2P_PRESENCE_RESP: 1680 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1); 1681 break; 1682 case P2P_GO_DISC_REQ: 1683 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq); 1684 break; 1685 default: 1686 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1687 "P2P: Received P2P Action - unknown type %u", data[0]); 1688 break; 1689 } 1690} 1691 1692 1693static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx) 1694{ 1695 struct p2p_data *p2p = eloop_ctx; 1696 if (p2p->go_neg_peer == NULL) 1697 return; 1698 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1699 p2p->go_neg_peer->status = P2P_SC_SUCCESS; 1700 p2p_connect_send(p2p, p2p->go_neg_peer); 1701} 1702 1703 1704static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx) 1705{ 1706 struct p2p_data *p2p = eloop_ctx; 1707 if (p2p->invite_peer == NULL) 1708 return; 1709 p2p->cfg->stop_listen(p2p->cfg->cb_ctx); 1710 p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr); 1711} 1712 1713 1714static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr, 1715 const u8 *ie, size_t ie_len) 1716{ 1717 struct p2p_message msg; 1718 struct p2p_device *dev; 1719 1720 os_memset(&msg, 0, sizeof(msg)); 1721 if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL) 1722 { 1723 p2p_parse_free(&msg); 1724 return; /* not a P2P probe */ 1725 } 1726 1727 if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN || 1728 os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) 1729 != 0) { 1730 /* The Probe Request is not part of P2P Device Discovery. It is 1731 * not known whether the source address of the frame is the P2P 1732 * Device Address or P2P Interface Address. Do not add a new 1733 * peer entry based on this frames. 1734 */ 1735 p2p_parse_free(&msg); 1736 return; 1737 } 1738 1739 dev = p2p_get_device(p2p, addr); 1740 if (dev) { 1741 if (dev->country[0] == 0 && msg.listen_channel) 1742 os_memcpy(dev->country, msg.listen_channel, 3); 1743 os_get_time(&dev->last_seen); 1744 p2p_parse_free(&msg); 1745 return; /* already known */ 1746 } 1747 1748 dev = p2p_create_device(p2p, addr); 1749 if (dev == NULL) { 1750 p2p_parse_free(&msg); 1751 return; 1752 } 1753 1754 os_get_time(&dev->last_seen); 1755 dev->flags |= P2P_DEV_PROBE_REQ_ONLY; 1756 1757 if (msg.listen_channel) { 1758 os_memcpy(dev->country, msg.listen_channel, 3); 1759 dev->listen_freq = p2p_channel_to_freq(dev->country, 1760 msg.listen_channel[3], 1761 msg.listen_channel[4]); 1762 } 1763 1764 p2p_copy_wps_info(dev, 1, &msg); 1765 1766 p2p_parse_free(&msg); 1767 1768 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1769 "P2P: Created device entry based on Probe Req: " MACSTR 1770 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d", 1771 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab, 1772 dev->info.group_capab, dev->info.device_name, 1773 dev->listen_freq); 1774} 1775 1776 1777struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p, 1778 const u8 *addr, 1779 struct p2p_message *msg) 1780{ 1781 struct p2p_device *dev; 1782 1783 dev = p2p_get_device(p2p, addr); 1784 if (dev) { 1785 os_get_time(&dev->last_seen); 1786 return dev; /* already known */ 1787 } 1788 1789 dev = p2p_create_device(p2p, addr); 1790 if (dev == NULL) 1791 return NULL; 1792 1793 p2p_add_dev_info(p2p, addr, dev, msg); 1794 1795 return dev; 1796} 1797 1798 1799static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type) 1800{ 1801 if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0) 1802 return 1; 1803 if (os_memcmp(dev_type, req_dev_type, 2) == 0 && 1804 WPA_GET_BE32(&req_dev_type[2]) == 0 && 1805 WPA_GET_BE16(&req_dev_type[6]) == 0) 1806 return 1; /* Category match with wildcard OUI/sub-category */ 1807 return 0; 1808} 1809 1810 1811int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[], 1812 size_t num_req_dev_type) 1813{ 1814 size_t i; 1815 for (i = 0; i < num_req_dev_type; i++) { 1816 if (dev_type_match(dev_type, req_dev_type[i])) 1817 return 1; 1818 } 1819 return 0; 1820} 1821 1822 1823/** 1824 * p2p_match_dev_type - Match local device type with requested type 1825 * @p2p: P2P module context from p2p_init() 1826 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) 1827 * Returns: 1 on match, 0 on mismatch 1828 * 1829 * This function can be used to match the Requested Device Type attribute in 1830 * WPS IE with the local device types for deciding whether to reply to a Probe 1831 * Request frame. 1832 */ 1833int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps) 1834{ 1835 struct wps_parse_attr attr; 1836 size_t i; 1837 1838 if (wps_parse_msg(wps, &attr)) 1839 return 1; /* assume no Requested Device Type attributes */ 1840 1841 if (attr.num_req_dev_type == 0) 1842 return 1; /* no Requested Device Type attributes -> match */ 1843 1844 if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type, 1845 attr.num_req_dev_type)) 1846 return 1; /* Own Primary Device Type matches */ 1847 1848 for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) 1849 if (dev_type_list_match(p2p->cfg->sec_dev_type[i], 1850 attr.req_dev_type, 1851 attr.num_req_dev_type)) 1852 return 1; /* Own Secondary Device Type matches */ 1853 1854 /* No matching device type found */ 1855 return 0; 1856} 1857 1858 1859struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p) 1860{ 1861 struct wpabuf *buf; 1862 u8 *len; 1863 int pw_id = -1; 1864 1865 buf = wpabuf_alloc(1000); 1866 if (buf == NULL) 1867 return NULL; 1868 1869 if (p2p->go_neg_peer) { 1870 /* Advertise immediate availability of WPS credential */ 1871 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method); 1872 } 1873 1874 p2p_build_wps_ie(p2p, buf, pw_id, 1); 1875 1876 /* P2P IE */ 1877 len = p2p_buf_add_ie_hdr(buf); 1878 p2p_buf_add_capability(buf, p2p->dev_capab & 1879 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 1880 if (p2p->ext_listen_interval) 1881 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 1882 p2p->ext_listen_interval); 1883 p2p_buf_add_device_info(buf, p2p, NULL); 1884 p2p_buf_update_ie_hdr(buf, len); 1885 1886 return buf; 1887} 1888 1889 1890static int is_11b(u8 rate) 1891{ 1892 return rate == 0x02 || rate == 0x04 || rate == 0x0b || rate == 0x16; 1893} 1894 1895 1896static int supp_rates_11b_only(struct ieee802_11_elems *elems) 1897{ 1898 int num_11b = 0, num_others = 0; 1899 int i; 1900 1901 if (elems->supp_rates == NULL && elems->ext_supp_rates == NULL) 1902 return 0; 1903 1904 for (i = 0; elems->supp_rates && i < elems->supp_rates_len; i++) { 1905 if (is_11b(elems->supp_rates[i])) 1906 num_11b++; 1907 else 1908 num_others++; 1909 } 1910 1911 for (i = 0; elems->ext_supp_rates && i < elems->ext_supp_rates_len; 1912 i++) { 1913 if (is_11b(elems->ext_supp_rates[i])) 1914 num_11b++; 1915 else 1916 num_others++; 1917 } 1918 1919 return num_11b > 0 && num_others == 0; 1920} 1921 1922 1923static enum p2p_probe_req_status 1924p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 1925 const u8 *bssid, const u8 *ie, size_t ie_len) 1926{ 1927 struct ieee802_11_elems elems; 1928 struct wpabuf *buf; 1929 struct ieee80211_mgmt *resp; 1930 struct p2p_message msg; 1931 struct wpabuf *ies; 1932 1933 if (!p2p->in_listen || !p2p->drv_in_listen) { 1934 /* not in Listen state - ignore Probe Request */ 1935 return P2P_PREQ_NOT_LISTEN; 1936 } 1937 1938 if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) == 1939 ParseFailed) { 1940 /* Ignore invalid Probe Request frames */ 1941 return P2P_PREQ_MALFORMED; 1942 } 1943 1944 if (elems.p2p == NULL) { 1945 /* not a P2P probe - ignore it */ 1946 return P2P_PREQ_NOT_P2P; 1947 } 1948 1949 if (dst && !is_broadcast_ether_addr(dst) && 1950 os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 1951 /* Not sent to the broadcast address or our P2P Device Address 1952 */ 1953 return P2P_PREQ_NOT_PROCESSED; 1954 } 1955 1956 if (bssid && !is_broadcast_ether_addr(bssid)) { 1957 /* Not sent to the Wildcard BSSID */ 1958 return P2P_PREQ_NOT_PROCESSED; 1959 } 1960 1961 if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN || 1962 os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) != 1963 0) { 1964 /* not using P2P Wildcard SSID - ignore */ 1965 return P2P_PREQ_NOT_PROCESSED; 1966 } 1967 1968 if (supp_rates_11b_only(&elems)) { 1969 /* Indicates support for 11b rates only */ 1970 return P2P_PREQ_NOT_P2P; 1971 } 1972 1973 os_memset(&msg, 0, sizeof(msg)); 1974 if (p2p_parse_ies(ie, ie_len, &msg) < 0) { 1975 /* Could not parse P2P attributes */ 1976 return P2P_PREQ_NOT_P2P; 1977 } 1978 1979 if (msg.device_id && 1980 os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) { 1981 /* Device ID did not match */ 1982 p2p_parse_free(&msg); 1983 return P2P_PREQ_NOT_PROCESSED; 1984 } 1985 1986 /* Check Requested Device Type match */ 1987 if (msg.wps_attributes && 1988 !p2p_match_dev_type(p2p, msg.wps_attributes)) { 1989 /* No match with Requested Device Type */ 1990 p2p_parse_free(&msg); 1991 return P2P_PREQ_NOT_PROCESSED; 1992 } 1993 p2p_parse_free(&msg); 1994 1995 if (!p2p->cfg->send_probe_resp) { 1996 /* Response generated elsewhere */ 1997 return P2P_PREQ_NOT_PROCESSED; 1998 } 1999 2000 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2001 "P2P: Reply to P2P Probe Request in Listen state"); 2002 2003 /* 2004 * We do not really have a specific BSS that this frame is advertising, 2005 * so build a frame that has some information in valid format. This is 2006 * really only used for discovery purposes, not to learn exact BSS 2007 * parameters. 2008 */ 2009 ies = p2p_build_probe_resp_ies(p2p); 2010 if (ies == NULL) 2011 return P2P_PREQ_NOT_PROCESSED; 2012 2013 buf = wpabuf_alloc(200 + wpabuf_len(ies)); 2014 if (buf == NULL) { 2015 wpabuf_free(ies); 2016 return P2P_PREQ_NOT_PROCESSED; 2017 } 2018 2019 resp = NULL; 2020 resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp); 2021 2022 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | 2023 (WLAN_FC_STYPE_PROBE_RESP << 4)); 2024 os_memcpy(resp->da, addr, ETH_ALEN); 2025 os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN); 2026 os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN); 2027 resp->u.probe_resp.beacon_int = host_to_le16(100); 2028 /* hardware or low-level driver will setup seq_ctrl and timestamp */ 2029 resp->u.probe_resp.capab_info = 2030 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE | 2031 WLAN_CAPABILITY_PRIVACY | 2032 WLAN_CAPABILITY_SHORT_SLOT_TIME); 2033 2034 wpabuf_put_u8(buf, WLAN_EID_SSID); 2035 wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN); 2036 wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); 2037 2038 wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES); 2039 wpabuf_put_u8(buf, 8); 2040 wpabuf_put_u8(buf, (60 / 5) | 0x80); 2041 wpabuf_put_u8(buf, 90 / 5); 2042 wpabuf_put_u8(buf, (120 / 5) | 0x80); 2043 wpabuf_put_u8(buf, 180 / 5); 2044 wpabuf_put_u8(buf, (240 / 5) | 0x80); 2045 wpabuf_put_u8(buf, 360 / 5); 2046 wpabuf_put_u8(buf, 480 / 5); 2047 wpabuf_put_u8(buf, 540 / 5); 2048 2049 wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS); 2050 wpabuf_put_u8(buf, 1); 2051 wpabuf_put_u8(buf, p2p->cfg->channel); 2052 2053 wpabuf_put_buf(buf, ies); 2054 wpabuf_free(ies); 2055 2056 p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf); 2057 2058 wpabuf_free(buf); 2059 2060 return P2P_PREQ_NOT_PROCESSED; 2061} 2062 2063 2064enum p2p_probe_req_status 2065p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst, 2066 const u8 *bssid, const u8 *ie, size_t ie_len) 2067{ 2068 enum p2p_probe_req_status res; 2069 2070 p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len); 2071 2072 res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len); 2073 2074 if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) && 2075 p2p->go_neg_peer && 2076 os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN) 2077 == 0) { 2078 /* Received a Probe Request from GO Negotiation peer */ 2079 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2080 "P2P: Found GO Negotiation peer - try to start GO " 2081 "negotiation from timeout"); 2082 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL); 2083 return P2P_PREQ_PROCESSED; 2084 } 2085 2086 if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) && 2087 p2p->invite_peer && 2088 os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN) 2089 == 0) { 2090 /* Received a Probe Request from Invite peer */ 2091 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2092 "P2P: Found Invite peer - try to start Invite from " 2093 "timeout"); 2094 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL); 2095 return P2P_PREQ_PROCESSED; 2096 } 2097 2098 return res; 2099} 2100 2101 2102static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid, 2103 u8 *buf, size_t len, struct wpabuf *p2p_ie) 2104{ 2105 struct wpabuf *tmp; 2106 u8 *lpos; 2107 size_t tmplen; 2108 int res; 2109 u8 group_capab; 2110 2111 if (p2p_ie == NULL) 2112 return 0; /* WLAN AP is not a P2P manager */ 2113 2114 /* 2115 * (Re)Association Request - P2P IE 2116 * P2P Capability attribute (shall be present) 2117 * P2P Interface attribute (present if concurrent device and 2118 * P2P Management is enabled) 2119 */ 2120 tmp = wpabuf_alloc(200); 2121 if (tmp == NULL) 2122 return -1; 2123 2124 lpos = p2p_buf_add_ie_hdr(tmp); 2125 group_capab = 0; 2126 if (p2p->num_groups > 0) { 2127 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; 2128 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2129 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) && 2130 p2p->cross_connect) 2131 group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 2132 } 2133 p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab); 2134 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) && 2135 (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED)) 2136 p2p_buf_add_p2p_interface(tmp, p2p); 2137 p2p_buf_update_ie_hdr(tmp, lpos); 2138 2139 tmplen = wpabuf_len(tmp); 2140 if (tmplen > len) 2141 res = -1; 2142 else { 2143 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2144 res = tmplen; 2145 } 2146 wpabuf_free(tmp); 2147 2148 return res; 2149} 2150 2151 2152int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf, 2153 size_t len, int p2p_group, struct wpabuf *p2p_ie) 2154{ 2155 struct wpabuf *tmp; 2156 u8 *lpos; 2157 struct p2p_device *peer; 2158 size_t tmplen; 2159 int res; 2160 2161 if (!p2p_group) 2162 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie); 2163 2164 /* 2165 * (Re)Association Request - P2P IE 2166 * P2P Capability attribute (shall be present) 2167 * Extended Listen Timing (may be present) 2168 * P2P Device Info attribute (shall be present) 2169 */ 2170 tmp = wpabuf_alloc(200); 2171 if (tmp == NULL) 2172 return -1; 2173 2174 peer = bssid ? p2p_get_device(p2p, bssid) : NULL; 2175 2176 lpos = p2p_buf_add_ie_hdr(tmp); 2177 p2p_buf_add_capability(tmp, p2p->dev_capab, 0); 2178 if (p2p->ext_listen_interval) 2179 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period, 2180 p2p->ext_listen_interval); 2181 p2p_buf_add_device_info(tmp, p2p, peer); 2182 p2p_buf_update_ie_hdr(tmp, lpos); 2183 2184 tmplen = wpabuf_len(tmp); 2185 if (tmplen > len) 2186 res = -1; 2187 else { 2188 os_memcpy(buf, wpabuf_head(tmp), tmplen); 2189 res = tmplen; 2190 } 2191 wpabuf_free(tmp); 2192 2193 return res; 2194} 2195 2196 2197int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) 2198{ 2199 struct wpabuf *p2p_ie; 2200 int ret; 2201 2202 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE); 2203 if (p2p_ie == NULL) 2204 return 0; 2205 2206 ret = p2p_attr_text(p2p_ie, buf, end); 2207 wpabuf_free(p2p_ie); 2208 return ret; 2209} 2210 2211 2212int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr) 2213{ 2214 struct p2p_message msg; 2215 2216 os_memset(&msg, 0, sizeof(msg)); 2217 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 2218 return -1; 2219 2220 if (msg.p2p_device_addr) { 2221 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); 2222 return 0; 2223 } else if (msg.device_id) { 2224 os_memcpy(dev_addr, msg.device_id, ETH_ALEN); 2225 return 0; 2226 } 2227 return -1; 2228} 2229 2230 2231int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr) 2232{ 2233 struct wpabuf *p2p_ie; 2234 int ret; 2235 2236 p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, 2237 P2P_IE_VENDOR_TYPE); 2238 if (p2p_ie == NULL) 2239 return -1; 2240 ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr); 2241 wpabuf_free(p2p_ie); 2242 return ret; 2243} 2244 2245 2246static void p2p_clear_go_neg(struct p2p_data *p2p) 2247{ 2248 p2p->go_neg_peer = NULL; 2249 p2p_clear_timeout(p2p); 2250 p2p_set_state(p2p, P2P_IDLE); 2251} 2252 2253 2254void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr) 2255{ 2256 if (p2p->go_neg_peer == NULL) { 2257 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2258 "P2P: No pending Group Formation - " 2259 "ignore WPS registration success notification"); 2260 return; /* No pending Group Formation */ 2261 } 2262 2263 if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) != 2264 0) { 2265 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2266 "P2P: Ignore WPS registration success notification " 2267 "for " MACSTR " (GO Negotiation peer " MACSTR ")", 2268 MAC2STR(mac_addr), 2269 MAC2STR(p2p->go_neg_peer->intended_addr)); 2270 return; /* Ignore unexpected peer address */ 2271 } 2272 2273 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2274 "P2P: Group Formation completed successfully with " MACSTR, 2275 MAC2STR(mac_addr)); 2276 2277 p2p_clear_go_neg(p2p); 2278} 2279 2280 2281void p2p_group_formation_failed(struct p2p_data *p2p) 2282{ 2283 if (p2p->go_neg_peer == NULL) { 2284 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2285 "P2P: No pending Group Formation - " 2286 "ignore group formation failure notification"); 2287 return; /* No pending Group Formation */ 2288 } 2289 2290 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2291 "P2P: Group Formation failed with " MACSTR, 2292 MAC2STR(p2p->go_neg_peer->intended_addr)); 2293 2294 p2p_clear_go_neg(p2p); 2295} 2296 2297 2298struct p2p_data * p2p_init(const struct p2p_config *cfg) 2299{ 2300 struct p2p_data *p2p; 2301 2302 if (cfg->max_peers < 1) 2303 return NULL; 2304 2305 p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg)); 2306 if (p2p == NULL) 2307 return NULL; 2308 p2p->cfg = (struct p2p_config *) (p2p + 1); 2309 os_memcpy(p2p->cfg, cfg, sizeof(*cfg)); 2310 if (cfg->dev_name) 2311 p2p->cfg->dev_name = os_strdup(cfg->dev_name); 2312 if (cfg->manufacturer) 2313 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer); 2314 if (cfg->model_name) 2315 p2p->cfg->model_name = os_strdup(cfg->model_name); 2316 if (cfg->model_number) 2317 p2p->cfg->model_number = os_strdup(cfg->model_number); 2318 if (cfg->serial_number) 2319 p2p->cfg->serial_number = os_strdup(cfg->serial_number); 2320 if (cfg->pref_chan) { 2321 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan * 2322 sizeof(struct p2p_channel)); 2323 if (p2p->cfg->pref_chan) { 2324 os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan, 2325 cfg->num_pref_chan * 2326 sizeof(struct p2p_channel)); 2327 } else 2328 p2p->cfg->num_pref_chan = 0; 2329 } 2330 2331#ifdef ANDROID_P2P 2332 /* 100ms listen time is too less to receive the response frames in some scenarios 2333 * increasing min listen time to 200ms. 2334 */ 2335 p2p->min_disc_int = 2; 2336 /* SD_FAIR_POLICY: Initializing the SD current serviced pointer to NULL */ 2337 p2p->sd_dev_list = NULL; 2338#else 2339 p2p->min_disc_int = 1; 2340#endif 2341 p2p->max_disc_int = 3; 2342 2343 os_get_random(&p2p->next_tie_breaker, 1); 2344 p2p->next_tie_breaker &= 0x01; 2345 if (cfg->sd_request) 2346 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY; 2347 p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE; 2348 if (cfg->concurrent_operations) 2349 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER; 2350 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 2351 2352 dl_list_init(&p2p->devices); 2353 2354 eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0, 2355 p2p_expiration_timeout, p2p, NULL); 2356 2357 return p2p; 2358} 2359 2360 2361void p2p_deinit(struct p2p_data *p2p) 2362{ 2363 eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL); 2364 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 2365 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2366 p2p_flush(p2p); 2367 p2p_free_req_dev_types(p2p); 2368 os_free(p2p->cfg->dev_name); 2369 os_free(p2p->cfg->manufacturer); 2370 os_free(p2p->cfg->model_name); 2371 os_free(p2p->cfg->model_number); 2372 os_free(p2p->cfg->serial_number); 2373 os_free(p2p->cfg->pref_chan); 2374 os_free(p2p->groups); 2375 wpabuf_free(p2p->sd_resp); 2376 os_free(p2p->after_scan_tx); 2377 p2p_remove_wps_vendor_extensions(p2p); 2378 os_free(p2p); 2379} 2380 2381 2382void p2p_flush(struct p2p_data *p2p) 2383{ 2384 struct p2p_device *dev, *prev; 2385 p2p_stop_find(p2p); 2386 dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device, 2387 list) { 2388 dl_list_del(&dev->list); 2389 p2p_device_free(p2p, dev); 2390 } 2391#ifdef ANDROID_P2P 2392 /* SD_FAIR_POLICY: Initializing the SD current serviced pointer to NULL */ 2393 p2p->sd_dev_list = NULL; 2394#endif 2395 p2p_free_sd_queries(p2p); 2396 os_free(p2p->after_scan_tx); 2397 p2p->after_scan_tx = NULL; 2398} 2399 2400 2401int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr) 2402{ 2403 struct p2p_device *dev; 2404 2405 dev = p2p_get_device(p2p, addr); 2406 if (dev == NULL) 2407 return -1; 2408 2409 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Unauthorizing " MACSTR, 2410 MAC2STR(addr)); 2411 2412 if (p2p->go_neg_peer == dev) 2413 p2p->go_neg_peer = NULL; 2414 2415 dev->wps_method = WPS_NOT_READY; 2416 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 2417 dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 2418 2419 /* Check if after_scan_tx is for this peer. If so free it */ 2420 if (p2p->after_scan_tx && 2421 os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) { 2422 os_free(p2p->after_scan_tx); 2423 p2p->after_scan_tx = NULL; 2424 } 2425 2426 return 0; 2427} 2428 2429 2430int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name) 2431{ 2432 os_free(p2p->cfg->dev_name); 2433 if (dev_name) { 2434 p2p->cfg->dev_name = os_strdup(dev_name); 2435 if (p2p->cfg->dev_name == NULL) 2436 return -1; 2437 } else 2438 p2p->cfg->dev_name = NULL; 2439 return 0; 2440} 2441 2442 2443int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer) 2444{ 2445 os_free(p2p->cfg->manufacturer); 2446 p2p->cfg->manufacturer = NULL; 2447 if (manufacturer) { 2448 p2p->cfg->manufacturer = os_strdup(manufacturer); 2449 if (p2p->cfg->manufacturer == NULL) 2450 return -1; 2451 } 2452 2453 return 0; 2454} 2455 2456 2457int p2p_set_model_name(struct p2p_data *p2p, const char *model_name) 2458{ 2459 os_free(p2p->cfg->model_name); 2460 p2p->cfg->model_name = NULL; 2461 if (model_name) { 2462 p2p->cfg->model_name = os_strdup(model_name); 2463 if (p2p->cfg->model_name == NULL) 2464 return -1; 2465 } 2466 2467 return 0; 2468} 2469 2470 2471int p2p_set_model_number(struct p2p_data *p2p, const char *model_number) 2472{ 2473 os_free(p2p->cfg->model_number); 2474 p2p->cfg->model_number = NULL; 2475 if (model_number) { 2476 p2p->cfg->model_number = os_strdup(model_number); 2477 if (p2p->cfg->model_number == NULL) 2478 return -1; 2479 } 2480 2481 return 0; 2482} 2483 2484 2485int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number) 2486{ 2487 os_free(p2p->cfg->serial_number); 2488 p2p->cfg->serial_number = NULL; 2489 if (serial_number) { 2490 p2p->cfg->serial_number = os_strdup(serial_number); 2491 if (p2p->cfg->serial_number == NULL) 2492 return -1; 2493 } 2494 2495 return 0; 2496} 2497 2498 2499void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods) 2500{ 2501 p2p->cfg->config_methods = config_methods; 2502} 2503 2504 2505void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid) 2506{ 2507 os_memcpy(p2p->cfg->uuid, uuid, 16); 2508} 2509 2510 2511int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type) 2512{ 2513 os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8); 2514 return 0; 2515} 2516 2517 2518int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8], 2519 size_t num_dev_types) 2520{ 2521 if (num_dev_types > P2P_SEC_DEVICE_TYPES) 2522 num_dev_types = P2P_SEC_DEVICE_TYPES; 2523 p2p->cfg->num_sec_dev_types = num_dev_types; 2524 os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8); 2525 return 0; 2526} 2527 2528 2529void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p) 2530{ 2531 int i; 2532 2533 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2534 wpabuf_free(p2p->wps_vendor_ext[i]); 2535 p2p->wps_vendor_ext[i] = NULL; 2536 } 2537} 2538 2539 2540int p2p_add_wps_vendor_extension(struct p2p_data *p2p, 2541 const struct wpabuf *vendor_ext) 2542{ 2543 int i; 2544 2545 if (vendor_ext == NULL) 2546 return -1; 2547 2548 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 2549 if (p2p->wps_vendor_ext[i] == NULL) 2550 break; 2551 } 2552 if (i >= P2P_MAX_WPS_VENDOR_EXT) 2553 return -1; 2554 2555 p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext); 2556 if (p2p->wps_vendor_ext[i] == NULL) 2557 return -1; 2558 2559 return 0; 2560} 2561 2562 2563int p2p_set_country(struct p2p_data *p2p, const char *country) 2564{ 2565 os_memcpy(p2p->cfg->country, country, 3); 2566 return 0; 2567} 2568 2569 2570void p2p_continue_find(struct p2p_data *p2p) 2571{ 2572 struct p2p_device *dev; 2573#ifdef ANDROID_P2P 2574 int skip=1; 2575#endif 2576 p2p_set_state(p2p, P2P_SEARCH); 2577 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2578#ifdef ANDROID_P2P 2579 /* SD_FAIR_POLICY: We need to give chance to all devices in the device list 2580 * There may be a scenario, where a particular peer device have 2581 * not registered any query response. When we send a SD request to such device, 2582 * no response will be received. And if we continue to get probe responses from that device, 2583 * and if that device happens to be on top in our device list, 2584 * we will always continue to send SD requests always to that peer only. 2585 * We will not be able to send SD requests to other devices in that case. 2586 * This implementation keeps track of last serviced peer device. 2587 * And then takes the next one from the device list, in the next iteration. 2588 */ 2589 if (p2p->sd_dev_list && p2p->sd_dev_list != &p2p->devices) { 2590 if(skip) { 2591 if ((&dev->list == p2p->sd_dev_list) ) { 2592 skip = 0; 2593 if (dev->list.next == &p2p->devices) 2594 p2p->sd_dev_list = NULL; 2595 } 2596 continue; 2597 } 2598 } 2599 p2p->sd_dev_list = &dev->list; 2600 wpa_printf(MSG_DEBUG, "P2P: ### Servicing %p dev->flags 0x%x SD schedule %s devaddr " MACSTR, 2601 p2p->sd_dev_list, dev->flags, dev->flags & P2P_DEV_SD_SCHEDULE ? "TRUE": "FALSE", 2602 MAC2STR(dev->info.p2p_device_addr)); 2603#endif 2604 if (dev->flags & P2P_DEV_SD_SCHEDULE) { 2605 if (p2p_start_sd(p2p, dev) == 0) 2606 return; 2607 else 2608 break; 2609 } else if (dev->req_config_methods && 2610 !(dev->flags & P2P_DEV_PD_FOR_JOIN)) { 2611 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Send " 2612 "pending Provision Discovery Request to " 2613 MACSTR " (config methods 0x%x)", 2614 MAC2STR(dev->info.p2p_device_addr), 2615 dev->req_config_methods); 2616 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0) 2617 return; 2618 } 2619 } 2620 2621 p2p_listen_in_find(p2p); 2622} 2623 2624 2625static void p2p_sd_cb(struct p2p_data *p2p, int success) 2626{ 2627 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2628 "P2P: Service Discovery Query TX callback: success=%d", 2629 success); 2630 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2631 2632 if (!success) { 2633 if (p2p->sd_peer) { 2634 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE; 2635 p2p->sd_peer = NULL; 2636 } 2637 p2p_continue_find(p2p); 2638 return; 2639 } 2640 2641 if (p2p->sd_peer == NULL) { 2642 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2643 "P2P: No SD peer entry known"); 2644 p2p_continue_find(p2p); 2645 return; 2646 } 2647 2648 /* Wait for response from the peer */ 2649 p2p_set_state(p2p, P2P_SD_DURING_FIND); 2650 p2p_set_timeout(p2p, 0, 200000); 2651} 2652 2653 2654/** 2655 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state 2656 * @p2p: P2P module context from p2p_init() 2657 */ 2658static void p2p_retry_pd(struct p2p_data *p2p) 2659{ 2660 struct p2p_device *dev; 2661 2662 if (p2p->state != P2P_IDLE) 2663 return; 2664 2665 /* 2666 * Retry the prov disc req attempt only for the peer that the user had 2667 * requested for and provided a join has not been initiated on it 2668 * in the meantime. 2669 */ 2670 2671 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 2672 if (os_memcmp(p2p->pending_pd_devaddr, 2673 dev->info.p2p_device_addr, ETH_ALEN) != 0) 2674 continue; 2675 if (!dev->req_config_methods) 2676 continue; 2677 if (dev->flags & P2P_DEV_PD_FOR_JOIN) 2678 continue; 2679 2680 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Send " 2681 "pending Provision Discovery Request to " 2682 MACSTR " (config methods 0x%x)", 2683 MAC2STR(dev->info.p2p_device_addr), 2684 dev->req_config_methods); 2685 p2p_send_prov_disc_req(p2p, dev, 0, 0); 2686 return; 2687 } 2688} 2689 2690 2691static void p2p_prov_disc_cb(struct p2p_data *p2p, int success) 2692{ 2693 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2694 "P2P: Provision Discovery Request TX callback: success=%d", 2695 success); 2696 2697 /* 2698 * Postpone resetting the pending action state till after we actually 2699 * time out. This allows us to take some action like notifying any 2700 * interested parties about no response to the request. 2701 * 2702 * When the timer (below) goes off we check in IDLE, SEARCH, or 2703 * LISTEN_ONLY state, which are the only allowed states to issue a PD 2704 * requests in, if this was still pending and then raise notification. 2705 */ 2706 2707 if (!success) { 2708 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2709 2710 if (p2p->state != P2P_IDLE) 2711 p2p_continue_find(p2p); 2712 else if (p2p->user_initiated_pd) { 2713 p2p->pending_action_state = P2P_PENDING_PD; 2714 p2p_set_timeout(p2p, 0, 300000); 2715 } 2716 return; 2717 } 2718 2719 /* 2720 * This postponing, of resetting pending_action_state, needs to be 2721 * done only for user initiated PD requests and not internal ones. 2722 */ 2723 if (p2p->user_initiated_pd) 2724 p2p->pending_action_state = P2P_PENDING_PD; 2725 else 2726 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2727 2728 /* Wait for response from the peer */ 2729 if (p2p->state == P2P_SEARCH) 2730 p2p_set_state(p2p, P2P_PD_DURING_FIND); 2731 p2p_set_timeout(p2p, 0, 200000); 2732} 2733 2734 2735int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq, 2736 int level, const u8 *ies, size_t ies_len) 2737{ 2738 p2p_add_device(p2p, bssid, freq, level, ies, ies_len, 1); 2739 2740 return 0; 2741} 2742 2743 2744void p2p_scan_res_handled(struct p2p_data *p2p) 2745{ 2746 if (!p2p->p2p_scan_running) { 2747 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan was not " 2748 "running, but scan results received"); 2749 } 2750 p2p->p2p_scan_running = 0; 2751 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL); 2752 2753 if (p2p_run_after_scan(p2p)) 2754 return; 2755 if (p2p->state == P2P_SEARCH) 2756 p2p_continue_find(p2p); 2757} 2758 2759 2760void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id) 2761{ 2762 u8 *len = p2p_buf_add_ie_hdr(ies); 2763 p2p_buf_add_capability(ies, p2p->dev_capab & 2764 ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0); 2765 if (dev_id) 2766 p2p_buf_add_device_id(ies, dev_id); 2767 if (p2p->cfg->reg_class && p2p->cfg->channel) 2768 p2p_buf_add_listen_channel(ies, p2p->cfg->country, 2769 p2p->cfg->reg_class, 2770 p2p->cfg->channel); 2771 if (p2p->ext_listen_interval) 2772 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period, 2773 p2p->ext_listen_interval); 2774 /* TODO: p2p_buf_add_operating_channel() if GO */ 2775 p2p_buf_update_ie_hdr(ies, len); 2776} 2777 2778 2779size_t p2p_scan_ie_buf_len(struct p2p_data *p2p) 2780{ 2781 return 100; 2782} 2783 2784 2785int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end) 2786{ 2787 return p2p_attr_text(p2p_ie, buf, end); 2788} 2789 2790 2791static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success) 2792{ 2793 struct p2p_device *dev = p2p->go_neg_peer; 2794 2795 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2796 "P2P: GO Negotiation Request TX callback: success=%d", 2797 success); 2798 2799 if (dev == NULL) { 2800 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2801 "P2P: No pending GO Negotiation"); 2802 return; 2803 } 2804 2805 if (success) { 2806 if (dev->flags & P2P_DEV_USER_REJECTED) { 2807 p2p_set_state(p2p, P2P_IDLE); 2808 return; 2809 } 2810 } else if (dev->go_neg_req_sent) { 2811 /* Cancel the increment from p2p_connect_send() on failure */ 2812 dev->go_neg_req_sent--; 2813 } 2814 2815 if (!success && 2816 (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) && 2817 !is_zero_ether_addr(dev->member_in_go_dev)) { 2818 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2819 "P2P: Peer " MACSTR " did not acknowledge request - " 2820 "try to use device discoverability through its GO", 2821 MAC2STR(dev->info.p2p_device_addr)); 2822 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 2823 p2p_send_dev_disc_req(p2p, dev); 2824 return; 2825 } 2826 2827 /* 2828 * Use P2P find, if needed, to find the other device from its listen 2829 * channel. 2830 */ 2831 p2p_set_state(p2p, P2P_CONNECT); 2832 p2p_set_timeout(p2p, 0, 100000); 2833} 2834 2835 2836static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success) 2837{ 2838 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2839 "P2P: GO Negotiation Response TX callback: success=%d", 2840 success); 2841 if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) { 2842 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2843 "P2P: Ignore TX callback event - GO Negotiation is " 2844 "not running anymore"); 2845 return; 2846 } 2847 p2p_set_state(p2p, P2P_CONNECT); 2848 p2p_set_timeout(p2p, 0, 100000); 2849} 2850 2851 2852static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success) 2853{ 2854 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2855 "P2P: GO Negotiation Response (failure) TX callback: " 2856 "success=%d", success); 2857 if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) { 2858 p2p_go_neg_failed(p2p, p2p->go_neg_peer, 2859 p2p->go_neg_peer->status); 2860 } 2861} 2862 2863 2864static void p2p_go_neg_conf_cb(struct p2p_data *p2p, 2865 enum p2p_send_action_result result) 2866{ 2867 struct p2p_device *dev; 2868 2869 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2870 "P2P: GO Negotiation Confirm TX callback: result=%d", 2871 result); 2872 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 2873 if (result == P2P_SEND_ACTION_FAILED) { 2874 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 2875 return; 2876 } 2877 if (result == P2P_SEND_ACTION_NO_ACK) { 2878 /* 2879 * It looks like the TX status for GO Negotiation Confirm is 2880 * often showing failure even when the peer has actually 2881 * received the frame. Since the peer may change channels 2882 * immediately after having received the frame, we may not see 2883 * an Ack for retries, so just dropping a single frame may 2884 * trigger this. To allow the group formation to succeed if the 2885 * peer did indeed receive the frame, continue regardless of 2886 * the TX status. 2887 */ 2888 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2889 "P2P: Assume GO Negotiation Confirm TX was actually " 2890 "received by the peer even though Ack was not " 2891 "reported"); 2892 } 2893 2894 dev = p2p->go_neg_peer; 2895 if (dev == NULL) 2896 return; 2897 2898 p2p_go_complete(p2p, dev); 2899} 2900 2901 2902void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 2903 const u8 *src, const u8 *bssid, 2904 enum p2p_send_action_result result) 2905{ 2906 enum p2p_pending_action_state state; 2907 int success; 2908 2909 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2910 "P2P: Action frame TX callback (state=%d freq=%u dst=" MACSTR 2911 " src=" MACSTR " bssid=" MACSTR " result=%d", 2912 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), 2913 MAC2STR(bssid), result); 2914 success = result == P2P_SEND_ACTION_SUCCESS; 2915 state = p2p->pending_action_state; 2916 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 2917 switch (state) { 2918 case P2P_NO_PENDING_ACTION: 2919 break; 2920 case P2P_PENDING_GO_NEG_REQUEST: 2921 p2p_go_neg_req_cb(p2p, success); 2922 break; 2923 case P2P_PENDING_GO_NEG_RESPONSE: 2924 p2p_go_neg_resp_cb(p2p, success); 2925 break; 2926 case P2P_PENDING_GO_NEG_RESPONSE_FAILURE: 2927 p2p_go_neg_resp_failure_cb(p2p, success); 2928 break; 2929 case P2P_PENDING_GO_NEG_CONFIRM: 2930 p2p_go_neg_conf_cb(p2p, result); 2931 break; 2932 case P2P_PENDING_SD: 2933 p2p_sd_cb(p2p, success); 2934 break; 2935 case P2P_PENDING_PD: 2936 p2p_prov_disc_cb(p2p, success); 2937 break; 2938 case P2P_PENDING_INVITATION_REQUEST: 2939 p2p_invitation_req_cb(p2p, success); 2940 break; 2941 case P2P_PENDING_INVITATION_RESPONSE: 2942 p2p_invitation_resp_cb(p2p, success); 2943 break; 2944 case P2P_PENDING_DEV_DISC_REQUEST: 2945 p2p_dev_disc_req_cb(p2p, success); 2946 break; 2947 case P2P_PENDING_DEV_DISC_RESPONSE: 2948 p2p_dev_disc_resp_cb(p2p, success); 2949 break; 2950 case P2P_PENDING_GO_DISC_REQ: 2951 p2p_go_disc_req_cb(p2p, success); 2952 break; 2953 } 2954} 2955 2956 2957void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq, 2958 unsigned int duration) 2959{ 2960 if (freq == p2p->pending_client_disc_freq) { 2961 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2962 "P2P: Client discoverability remain-awake completed"); 2963 p2p->pending_client_disc_freq = 0; 2964 return; 2965 } 2966 2967 if (freq != p2p->pending_listen_freq) { 2968 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2969 "P2P: Unexpected listen callback for freq=%u " 2970 "duration=%u (pending_listen_freq=%u)", 2971 freq, duration, p2p->pending_listen_freq); 2972 return; 2973 } 2974 2975 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 2976 "P2P: Starting Listen timeout(%u,%u) on freq=%u based on " 2977 "callback", 2978 p2p->pending_listen_sec, p2p->pending_listen_usec, 2979 p2p->pending_listen_freq); 2980 p2p->in_listen = 1; 2981 p2p->drv_in_listen = freq; 2982 if (p2p->pending_listen_sec || p2p->pending_listen_usec) { 2983 /* 2984 * Add 20 msec extra wait to avoid race condition with driver 2985 * remain-on-channel end event, i.e., give driver more time to 2986 * complete the operation before our timeout expires. 2987 */ 2988 p2p_set_timeout(p2p, p2p->pending_listen_sec, 2989 p2p->pending_listen_usec + 20000); 2990 } 2991 2992 p2p->pending_listen_freq = 0; 2993} 2994 2995 2996int p2p_listen_end(struct p2p_data *p2p, unsigned int freq) 2997{ 2998 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Driver ended Listen " 2999 "state (freq=%u)", freq); 3000 p2p->drv_in_listen = 0; 3001 if (p2p->in_listen) 3002 return 0; /* Internal timeout will trigger the next step */ 3003 3004 if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) { 3005 if (p2p->go_neg_peer->connect_reqs >= 120) { 3006 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3007 "P2P: Timeout on sending GO Negotiation " 3008 "Request without getting response"); 3009 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3010 return 0; 3011 } 3012 3013 p2p_set_state(p2p, P2P_CONNECT); 3014 p2p_connect_send(p2p, p2p->go_neg_peer); 3015 return 1; 3016 } else if (p2p->state == P2P_SEARCH) { 3017 if (p2p->p2p_scan_running) { 3018 /* 3019 * Search is already in progress. This can happen if 3020 * an Action frame RX is reported immediately after 3021 * the end of a remain-on-channel operation and the 3022 * response frame to that is sent using an offchannel 3023 * operation while in p2p_find. Avoid an attempt to 3024 * restart a scan here. 3025 */ 3026 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: p2p_scan " 3027 "already in progress - do not try to start a " 3028 "new one"); 3029 return 1; 3030 } 3031 if (p2p->pending_listen_freq) { 3032 /* 3033 * Better wait a bit if the driver is unable to start 3034 * offchannel operation for some reason. p2p_search() 3035 * will be started from internal timeout. 3036 */ 3037 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Listen " 3038 "operation did not seem to start - delay " 3039 "search phase to avoid busy loop"); 3040 p2p_set_timeout(p2p, 0, 100000); 3041 return 1; 3042 } 3043 p2p_search(p2p); 3044 return 1; 3045 } 3046 3047 return 0; 3048} 3049 3050 3051static void p2p_timeout_connect(struct p2p_data *p2p) 3052{ 3053 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3054 if (p2p->go_neg_peer && 3055 (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 3056 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Wait for GO " 3057 "Negotiation Confirm timed out - assume GO " 3058 "Negotiation failed"); 3059 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3060 return; 3061 } 3062 p2p_set_state(p2p, P2P_CONNECT_LISTEN); 3063 p2p_listen_in_find(p2p); 3064} 3065 3066 3067static void p2p_timeout_connect_listen(struct p2p_data *p2p) 3068{ 3069 if (p2p->go_neg_peer) { 3070 if (p2p->drv_in_listen) { 3071 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Driver is " 3072 "still in Listen state; wait for it to " 3073 "complete"); 3074 return; 3075 } 3076 3077 if (p2p->go_neg_peer->connect_reqs >= 120) { 3078 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3079 "P2P: Timeout on sending GO Negotiation " 3080 "Request without getting response"); 3081 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1); 3082 return; 3083 } 3084 3085 p2p_set_state(p2p, P2P_CONNECT); 3086 p2p_connect_send(p2p, p2p->go_neg_peer); 3087 } else 3088 p2p_set_state(p2p, P2P_IDLE); 3089} 3090 3091 3092static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p) 3093{ 3094 /* 3095 * TODO: could remain constantly in Listen state for some time if there 3096 * are no other concurrent uses for the radio. For now, go to listen 3097 * state once per second to give other uses a chance to use the radio. 3098 */ 3099 p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 3100 p2p_set_timeout(p2p, 0, 500000); 3101} 3102 3103 3104static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p) 3105{ 3106 struct p2p_device *dev = p2p->go_neg_peer; 3107 3108 if (dev == NULL) { 3109 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3110 "P2P: Unknown GO Neg peer - stop GO Neg wait"); 3111 return; 3112 } 3113 3114 dev->wait_count++; 3115 if (dev->wait_count >= 120) { 3116 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3117 "P2P: Timeout on waiting peer to become ready for GO " 3118 "Negotiation"); 3119 p2p_go_neg_failed(p2p, dev, -1); 3120 return; 3121 } 3122 3123 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3124 "P2P: Go to Listen state while waiting for the peer to become " 3125 "ready for GO Negotiation"); 3126 p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT); 3127 p2p_listen_in_find(p2p); 3128} 3129 3130 3131static void p2p_timeout_sd_during_find(struct p2p_data *p2p) 3132{ 3133 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3134 "P2P: Service Discovery Query timeout"); 3135 if (p2p->sd_peer) { 3136 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3137 p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE; 3138 p2p->sd_peer = NULL; 3139 } 3140 p2p_continue_find(p2p); 3141} 3142 3143 3144static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p) 3145{ 3146 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3147 "P2P: Provision Discovery Request timeout"); 3148 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3149 p2p_continue_find(p2p); 3150} 3151 3152 3153static void p2p_timeout_prov_disc_req(struct p2p_data *p2p) 3154{ 3155 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3156 3157 /* 3158 * For user initiated PD requests that we have not gotten any responses 3159 * for while in IDLE state, we retry them a couple of times before 3160 * giving up. 3161 */ 3162 if (!p2p->user_initiated_pd) 3163 return; 3164 3165 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3166 "P2P: User initiated Provision Discovery Request timeout"); 3167 3168 if (p2p->pd_retries) { 3169 p2p->pd_retries--; 3170 p2p_retry_pd(p2p); 3171 } else { 3172 if (p2p->cfg->prov_disc_fail) 3173 p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, 3174 p2p->pending_pd_devaddr, 3175 P2P_PROV_DISC_TIMEOUT); 3176 p2p_reset_pending_pd(p2p); 3177 } 3178} 3179 3180 3181static void p2p_timeout_invite(struct p2p_data *p2p) 3182{ 3183 p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 3184 p2p_set_state(p2p, P2P_INVITE_LISTEN); 3185 if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 3186 /* 3187 * Better remain on operating channel instead of listen channel 3188 * when running a group. 3189 */ 3190 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Inviting in " 3191 "active GO role - wait on operating channel"); 3192 p2p_set_timeout(p2p, 0, 100000); 3193 return; 3194 } 3195 p2p_listen_in_find(p2p); 3196} 3197 3198 3199static void p2p_timeout_invite_listen(struct p2p_data *p2p) 3200{ 3201 if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) { 3202 p2p_set_state(p2p, P2P_INVITE); 3203 p2p_invite_send(p2p, p2p->invite_peer, 3204 p2p->invite_go_dev_addr); 3205 } else { 3206 if (p2p->invite_peer) { 3207 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3208 "P2P: Invitation Request retry limit reached"); 3209 if (p2p->cfg->invitation_result) 3210 p2p->cfg->invitation_result( 3211 p2p->cfg->cb_ctx, -1, NULL); 3212 } 3213 p2p_set_state(p2p, P2P_IDLE); 3214 } 3215} 3216 3217 3218static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx) 3219{ 3220 struct p2p_data *p2p = eloop_ctx; 3221 3222 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Timeout (state=%s)", 3223 p2p_state_txt(p2p->state)); 3224 3225 p2p->in_listen = 0; 3226 3227 switch (p2p->state) { 3228 case P2P_IDLE: 3229 /* Check if we timed out waiting for PD req */ 3230 if (p2p->pending_action_state == P2P_PENDING_PD) 3231 p2p_timeout_prov_disc_req(p2p); 3232 break; 3233 case P2P_SEARCH: 3234 /* Check if we timed out waiting for PD req */ 3235 if (p2p->pending_action_state == P2P_PENDING_PD) 3236 p2p_timeout_prov_disc_req(p2p); 3237 p2p_search(p2p); 3238 break; 3239 case P2P_CONNECT: 3240 p2p_timeout_connect(p2p); 3241 break; 3242 case P2P_CONNECT_LISTEN: 3243 p2p_timeout_connect_listen(p2p); 3244 break; 3245 case P2P_GO_NEG: 3246 break; 3247 case P2P_LISTEN_ONLY: 3248 /* Check if we timed out waiting for PD req */ 3249 if (p2p->pending_action_state == P2P_PENDING_PD) 3250 p2p_timeout_prov_disc_req(p2p); 3251 3252 if (p2p->ext_listen_only) { 3253 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3254 "P2P: Extended Listen Timing - Listen State " 3255 "completed"); 3256 p2p->ext_listen_only = 0; 3257 p2p_set_state(p2p, P2P_IDLE); 3258 } 3259 break; 3260 case P2P_WAIT_PEER_CONNECT: 3261 p2p_timeout_wait_peer_connect(p2p); 3262 break; 3263 case P2P_WAIT_PEER_IDLE: 3264 p2p_timeout_wait_peer_idle(p2p); 3265 break; 3266 case P2P_SD_DURING_FIND: 3267 p2p_timeout_sd_during_find(p2p); 3268 break; 3269 case P2P_PROVISIONING: 3270 break; 3271 case P2P_PD_DURING_FIND: 3272 p2p_timeout_prov_disc_during_find(p2p); 3273 break; 3274 case P2P_INVITE: 3275 p2p_timeout_invite(p2p); 3276 break; 3277 case P2P_INVITE_LISTEN: 3278 p2p_timeout_invite_listen(p2p); 3279 break; 3280 case P2P_SEARCH_WHEN_READY: 3281 break; 3282 } 3283} 3284 3285 3286int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr) 3287{ 3288 struct p2p_device *dev; 3289 3290 dev = p2p_get_device(p2p, peer_addr); 3291 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Local request to reject " 3292 "connection attempts by peer " MACSTR, MAC2STR(peer_addr)); 3293 if (dev == NULL) { 3294 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer " MACSTR 3295 " unknown", MAC2STR(peer_addr)); 3296 return -1; 3297 } 3298 dev->status = P2P_SC_FAIL_REJECTED_BY_USER; 3299 dev->flags |= P2P_DEV_USER_REJECTED; 3300 return 0; 3301} 3302 3303 3304const char * p2p_wps_method_text(enum p2p_wps_method method) 3305{ 3306 switch (method) { 3307 case WPS_NOT_READY: 3308 return "not-ready"; 3309 case WPS_PIN_DISPLAY: 3310 return "Display"; 3311 case WPS_PIN_KEYPAD: 3312 return "Keypad"; 3313 case WPS_PBC: 3314 return "PBC"; 3315 } 3316 3317 return "??"; 3318} 3319 3320 3321static const char * p2p_go_state_text(enum p2p_go_state go_state) 3322{ 3323 switch (go_state) { 3324 case UNKNOWN_GO: 3325 return "unknown"; 3326 case LOCAL_GO: 3327 return "local"; 3328 case REMOTE_GO: 3329 return "remote"; 3330 } 3331 3332 return "??"; 3333} 3334 3335 3336const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p, 3337 const u8 *addr, int next) 3338{ 3339 struct p2p_device *dev; 3340 3341 if (addr) 3342 dev = p2p_get_device(p2p, addr); 3343 else 3344 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 3345 3346 if (dev && next) { 3347 dev = dl_list_first(&dev->list, struct p2p_device, list); 3348 if (&dev->list == &p2p->devices) 3349 dev = NULL; 3350 } 3351 3352 if (dev == NULL) 3353 return NULL; 3354 3355 return &dev->info; 3356} 3357 3358 3359int p2p_get_peer_info_txt(const struct p2p_peer_info *info, 3360 char *buf, size_t buflen) 3361{ 3362 struct p2p_device *dev; 3363 int res; 3364 char *pos, *end; 3365 struct os_time now; 3366 3367 if (info == NULL) 3368 return -1; 3369 3370 dev = (struct p2p_device *) (((u8 *) info) - 3371 offsetof(struct p2p_device, info)); 3372 3373 pos = buf; 3374 end = buf + buflen; 3375 3376 os_get_time(&now); 3377 res = os_snprintf(pos, end - pos, 3378 "age=%d\n" 3379 "listen_freq=%d\n" 3380 "wps_method=%s\n" 3381 "interface_addr=" MACSTR "\n" 3382 "member_in_go_dev=" MACSTR "\n" 3383 "member_in_go_iface=" MACSTR "\n" 3384 "go_neg_req_sent=%d\n" 3385 "go_state=%s\n" 3386 "dialog_token=%u\n" 3387 "intended_addr=" MACSTR "\n" 3388 "country=%c%c\n" 3389 "oper_freq=%d\n" 3390 "req_config_methods=0x%x\n" 3391 "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n" 3392 "status=%d\n" 3393 "wait_count=%u\n" 3394 "invitation_reqs=%u\n", 3395 (int) (now.sec - dev->last_seen.sec), 3396 dev->listen_freq, 3397 p2p_wps_method_text(dev->wps_method), 3398 MAC2STR(dev->interface_addr), 3399 MAC2STR(dev->member_in_go_dev), 3400 MAC2STR(dev->member_in_go_iface), 3401 dev->go_neg_req_sent, 3402 p2p_go_state_text(dev->go_state), 3403 dev->dialog_token, 3404 MAC2STR(dev->intended_addr), 3405 dev->country[0] ? dev->country[0] : '_', 3406 dev->country[1] ? dev->country[1] : '_', 3407 dev->oper_freq, 3408 dev->req_config_methods, 3409 dev->flags & P2P_DEV_PROBE_REQ_ONLY ? 3410 "[PROBE_REQ_ONLY]" : "", 3411 dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "", 3412 dev->flags & P2P_DEV_NOT_YET_READY ? 3413 "[NOT_YET_READY]" : "", 3414 dev->flags & P2P_DEV_SD_INFO ? "[SD_INFO]" : "", 3415 dev->flags & P2P_DEV_SD_SCHEDULE ? "[SD_SCHEDULE]" : 3416 "", 3417 dev->flags & P2P_DEV_PD_PEER_DISPLAY ? 3418 "[PD_PEER_DISPLAY]" : "", 3419 dev->flags & P2P_DEV_PD_PEER_KEYPAD ? 3420 "[PD_PEER_KEYPAD]" : "", 3421 dev->flags & P2P_DEV_USER_REJECTED ? 3422 "[USER_REJECTED]" : "", 3423 dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ? 3424 "[PEER_WAITING_RESPONSE]" : "", 3425 dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ? 3426 "[PREFER_PERSISTENT_GROUP]" : "", 3427 dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ? 3428 "[WAIT_GO_NEG_RESPONSE]" : "", 3429 dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ? 3430 "[WAIT_GO_NEG_CONFIRM]" : "", 3431 dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ? 3432 "[GROUP_CLIENT_ONLY]" : "", 3433 dev->flags & P2P_DEV_FORCE_FREQ ? 3434 "[FORCE_FREQ]" : "", 3435 dev->flags & P2P_DEV_PD_FOR_JOIN ? 3436 "[PD_FOR_JOIN]" : "", 3437 dev->status, 3438 dev->wait_count, 3439 dev->invitation_reqs); 3440 if (res < 0 || res >= end - pos) 3441 return pos - buf; 3442 pos += res; 3443 3444 if (dev->ext_listen_period) { 3445 res = os_snprintf(pos, end - pos, 3446 "ext_listen_period=%u\n" 3447 "ext_listen_interval=%u\n", 3448 dev->ext_listen_period, 3449 dev->ext_listen_interval); 3450 if (res < 0 || res >= end - pos) 3451 return pos - buf; 3452 pos += res; 3453 } 3454 3455 if (dev->oper_ssid_len) { 3456 res = os_snprintf(pos, end - pos, 3457 "oper_ssid=%s\n", 3458 wpa_ssid_txt(dev->oper_ssid, 3459 dev->oper_ssid_len)); 3460 if (res < 0 || res >= end - pos) 3461 return pos - buf; 3462 pos += res; 3463 } 3464 3465 return pos - buf; 3466} 3467 3468 3469int p2p_peer_known(struct p2p_data *p2p, const u8 *addr) 3470{ 3471 return p2p_get_device(p2p, addr) != NULL; 3472} 3473 3474 3475void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled) 3476{ 3477 if (enabled) { 3478 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Client " 3479 "discoverability enabled"); 3480 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3481 } else { 3482 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Client " 3483 "discoverability disabled"); 3484 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; 3485 } 3486} 3487 3488 3489static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1, 3490 u32 duration2, u32 interval2) 3491{ 3492 struct wpabuf *req; 3493 struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL; 3494 u8 *len; 3495 3496 req = wpabuf_alloc(100); 3497 if (req == NULL) 3498 return NULL; 3499 3500 if (duration1 || interval1) { 3501 os_memset(&desc1, 0, sizeof(desc1)); 3502 desc1.count_type = 1; 3503 desc1.duration = duration1; 3504 desc1.interval = interval1; 3505 ptr1 = &desc1; 3506 3507 if (duration2 || interval2) { 3508 os_memset(&desc2, 0, sizeof(desc2)); 3509 desc2.count_type = 2; 3510 desc2.duration = duration2; 3511 desc2.interval = interval2; 3512 ptr2 = &desc2; 3513 } 3514 } 3515 3516 p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1); 3517 len = p2p_buf_add_ie_hdr(req); 3518 p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2); 3519 p2p_buf_update_ie_hdr(req, len); 3520 3521 return req; 3522} 3523 3524 3525int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr, 3526 const u8 *own_interface_addr, unsigned int freq, 3527 u32 duration1, u32 interval1, u32 duration2, 3528 u32 interval2) 3529{ 3530 struct wpabuf *req; 3531 3532 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Send Presence Request to " 3533 "GO " MACSTR " (own interface " MACSTR ") freq=%u dur1=%u " 3534 "int1=%u dur2=%u int2=%u", 3535 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr), 3536 freq, duration1, interval1, duration2, interval2); 3537 3538 req = p2p_build_presence_req(duration1, interval1, duration2, 3539 interval2); 3540 if (req == NULL) 3541 return -1; 3542 3543 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3544 if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr, 3545 go_interface_addr, 3546 wpabuf_head(req), wpabuf_len(req), 200) < 0) { 3547 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3548 "P2P: Failed to send Action frame"); 3549 } 3550 wpabuf_free(req); 3551 3552 return 0; 3553} 3554 3555 3556static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa, 3557 size_t noa_len, u8 dialog_token) 3558{ 3559 struct wpabuf *resp; 3560 u8 *len; 3561 3562 resp = wpabuf_alloc(100 + noa_len); 3563 if (resp == NULL) 3564 return NULL; 3565 3566 p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token); 3567 len = p2p_buf_add_ie_hdr(resp); 3568 p2p_buf_add_status(resp, status); 3569 if (noa) { 3570 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE); 3571 wpabuf_put_le16(resp, noa_len); 3572 wpabuf_put_data(resp, noa, noa_len); 3573 } else 3574 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL); 3575 p2p_buf_update_ie_hdr(resp, len); 3576 3577 return resp; 3578} 3579 3580 3581static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da, 3582 const u8 *sa, const u8 *data, size_t len, 3583 int rx_freq) 3584{ 3585 struct p2p_message msg; 3586 u8 status; 3587 struct wpabuf *resp; 3588 size_t g; 3589 struct p2p_group *group = NULL; 3590 int parsed = 0; 3591 u8 noa[50]; 3592 int noa_len; 3593 3594 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3595 "P2P: Received P2P Action - P2P Presence Request"); 3596 3597 for (g = 0; g < p2p->num_groups; g++) { 3598 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]), 3599 ETH_ALEN) == 0) { 3600 group = p2p->groups[g]; 3601 break; 3602 } 3603 } 3604 if (group == NULL) { 3605 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3606 "P2P: Ignore P2P Presence Request for unknown group " 3607 MACSTR, MAC2STR(da)); 3608 return; 3609 } 3610 3611 if (p2p_parse(data, len, &msg) < 0) { 3612 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3613 "P2P: Failed to parse P2P Presence Request"); 3614 status = P2P_SC_FAIL_INVALID_PARAMS; 3615 goto fail; 3616 } 3617 parsed = 1; 3618 3619 if (msg.noa == NULL) { 3620 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3621 "P2P: No NoA attribute in P2P Presence Request"); 3622 status = P2P_SC_FAIL_INVALID_PARAMS; 3623 goto fail; 3624 } 3625 3626 status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len); 3627 3628fail: 3629 if (p2p->cfg->get_noa) 3630 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa, 3631 sizeof(noa)); 3632 else 3633 noa_len = -1; 3634 resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL, 3635 noa_len > 0 ? noa_len : 0, 3636 msg.dialog_token); 3637 if (parsed) 3638 p2p_parse_free(&msg); 3639 if (resp == NULL) 3640 return; 3641 3642 p2p->pending_action_state = P2P_NO_PENDING_ACTION; 3643 if (p2p_send_action(p2p, rx_freq, sa, da, da, 3644 wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 3645 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3646 "P2P: Failed to send Action frame"); 3647 } 3648 wpabuf_free(resp); 3649} 3650 3651 3652static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da, 3653 const u8 *sa, const u8 *data, size_t len) 3654{ 3655 struct p2p_message msg; 3656 3657 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3658 "P2P: Received P2P Action - P2P Presence Response"); 3659 3660 if (p2p_parse(data, len, &msg) < 0) { 3661 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3662 "P2P: Failed to parse P2P Presence Response"); 3663 return; 3664 } 3665 3666 if (msg.status == NULL || msg.noa == NULL) { 3667 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3668 "P2P: No Status or NoA attribute in P2P Presence " 3669 "Response"); 3670 p2p_parse_free(&msg); 3671 return; 3672 } 3673 3674 if (*msg.status) { 3675 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3676 "P2P: P2P Presence Request was rejected: status %u", 3677 *msg.status); 3678 p2p_parse_free(&msg); 3679 return; 3680 } 3681 3682 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3683 "P2P: P2P Presence Request was accepted"); 3684 wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA", 3685 msg.noa, msg.noa_len); 3686 /* TODO: process NoA */ 3687 p2p_parse_free(&msg); 3688} 3689 3690 3691static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx) 3692{ 3693 struct p2p_data *p2p = eloop_ctx; 3694 3695 if (p2p->ext_listen_interval) { 3696 /* Schedule next extended listen timeout */ 3697 eloop_register_timeout(p2p->ext_listen_interval_sec, 3698 p2p->ext_listen_interval_usec, 3699 p2p_ext_listen_timeout, p2p, NULL); 3700 } 3701 3702 if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) { 3703 /* 3704 * This should not really happen, but it looks like the Listen 3705 * command may fail is something else (e.g., a scan) was 3706 * running at an inconvenient time. As a workaround, allow new 3707 * Extended Listen operation to be started. 3708 */ 3709 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Previous " 3710 "Extended Listen operation had not been completed - " 3711 "try again"); 3712 p2p->ext_listen_only = 0; 3713 p2p_set_state(p2p, P2P_IDLE); 3714 } 3715 3716 if (p2p->state != P2P_IDLE) { 3717 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Skip Extended " 3718 "Listen timeout in active state (%s)", 3719 p2p_state_txt(p2p->state)); 3720 return; 3721 } 3722 3723 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Extended Listen timeout"); 3724 p2p->ext_listen_only = 1; 3725 if (p2p_listen(p2p, p2p->ext_listen_period) < 0) { 3726 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Failed to start " 3727 "Listen state for Extended Listen Timing"); 3728 p2p->ext_listen_only = 0; 3729 } 3730} 3731 3732 3733int p2p_ext_listen(struct p2p_data *p2p, unsigned int period, 3734 unsigned int interval) 3735{ 3736 if (period > 65535 || interval > 65535 || period > interval || 3737 (period == 0 && interval > 0) || (period > 0 && interval == 0)) { 3738 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3739 "P2P: Invalid Extended Listen Timing request: " 3740 "period=%u interval=%u", period, interval); 3741 return -1; 3742 } 3743 3744 eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL); 3745 3746 if (interval == 0) { 3747 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3748 "P2P: Disabling Extended Listen Timing"); 3749 p2p->ext_listen_period = 0; 3750 p2p->ext_listen_interval = 0; 3751 return 0; 3752 } 3753 3754 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 3755 "P2P: Enabling Extended Listen Timing: period %u msec, " 3756 "interval %u msec", period, interval); 3757 p2p->ext_listen_period = period; 3758 p2p->ext_listen_interval = interval; 3759 p2p->ext_listen_interval_sec = interval / 1000; 3760 p2p->ext_listen_interval_usec = (interval % 1000) * 1000; 3761 3762 eloop_register_timeout(p2p->ext_listen_interval_sec, 3763 p2p->ext_listen_interval_usec, 3764 p2p_ext_listen_timeout, p2p, NULL); 3765 3766 return 0; 3767} 3768 3769 3770void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 3771 const u8 *ie, size_t ie_len) 3772{ 3773 struct p2p_message msg; 3774 3775 if (bssid == NULL || ie == NULL) 3776 return; 3777 3778 os_memset(&msg, 0, sizeof(msg)); 3779 if (p2p_parse_ies(ie, ie_len, &msg)) 3780 return; 3781 if (msg.minor_reason_code == NULL) 3782 return; 3783 3784 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, 3785 "P2P: Deauthentication notification BSSID " MACSTR 3786 " reason_code=%u minor_reason_code=%u", 3787 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 3788 3789 p2p_parse_free(&msg); 3790} 3791 3792 3793void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code, 3794 const u8 *ie, size_t ie_len) 3795{ 3796 struct p2p_message msg; 3797 3798 if (bssid == NULL || ie == NULL) 3799 return; 3800 3801 os_memset(&msg, 0, sizeof(msg)); 3802 if (p2p_parse_ies(ie, ie_len, &msg)) 3803 return; 3804 if (msg.minor_reason_code == NULL) 3805 return; 3806 3807 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, 3808 "P2P: Disassociation notification BSSID " MACSTR 3809 " reason_code=%u minor_reason_code=%u", 3810 MAC2STR(bssid), reason_code, *msg.minor_reason_code); 3811 3812 p2p_parse_free(&msg); 3813} 3814 3815 3816void p2p_set_managed_oper(struct p2p_data *p2p, int enabled) 3817{ 3818 if (enabled) { 3819 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Managed P2P " 3820 "Device operations enabled"); 3821 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED; 3822 } else { 3823 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Managed P2P " 3824 "Device operations disabled"); 3825 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED; 3826 } 3827} 3828 3829 3830int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel) 3831{ 3832 if (p2p_channel_to_freq(p2p->cfg->country, reg_class, channel) < 0) 3833 return -1; 3834 3835 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Set Listen channel: " 3836 "reg_class %u channel %u", reg_class, channel); 3837 p2p->cfg->reg_class = reg_class; 3838 p2p->cfg->channel = channel; 3839 3840 return 0; 3841} 3842 3843 3844int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len) 3845{ 3846 wpa_hexdump_ascii(MSG_DEBUG, "P2P: New SSID postfix", postfix, len); 3847 if (postfix == NULL) { 3848 p2p->cfg->ssid_postfix_len = 0; 3849 return 0; 3850 } 3851 if (len > sizeof(p2p->cfg->ssid_postfix)) 3852 return -1; 3853 os_memcpy(p2p->cfg->ssid_postfix, postfix, len); 3854 p2p->cfg->ssid_postfix_len = len; 3855 return 0; 3856} 3857 3858 3859int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel, 3860 int cfg_op_channel) 3861{ 3862 if (p2p_channel_to_freq(p2p->cfg->country, op_reg_class, op_channel) 3863 < 0) 3864 return -1; 3865 3866 wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, "P2P: Set Operating channel: " 3867 "reg_class %u channel %u", op_reg_class, op_channel); 3868 p2p->cfg->op_reg_class = op_reg_class; 3869 p2p->cfg->op_channel = op_channel; 3870 p2p->cfg->cfg_op_channel = cfg_op_channel; 3871 return 0; 3872} 3873 3874 3875int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan, 3876 const struct p2p_channel *pref_chan) 3877{ 3878 struct p2p_channel *n; 3879 3880 if (pref_chan) { 3881 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel)); 3882 if (n == NULL) 3883 return -1; 3884 os_memcpy(n, pref_chan, 3885 num_pref_chan * sizeof(struct p2p_channel)); 3886 } else 3887 n = NULL; 3888 3889 os_free(p2p->cfg->pref_chan); 3890 p2p->cfg->pref_chan = n; 3891 p2p->cfg->num_pref_chan = num_pref_chan; 3892 3893 return 0; 3894} 3895 3896 3897int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr, 3898 u8 *iface_addr) 3899{ 3900 struct p2p_device *dev = p2p_get_device(p2p, dev_addr); 3901 if (dev == NULL || is_zero_ether_addr(dev->interface_addr)) 3902 return -1; 3903 os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN); 3904 return 0; 3905} 3906 3907 3908int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr, 3909 u8 *dev_addr) 3910{ 3911 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 3912 if (dev == NULL) 3913 return -1; 3914 os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN); 3915 return 0; 3916} 3917 3918 3919void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr) 3920{ 3921 os_memcpy(p2p->peer_filter, addr, ETH_ALEN); 3922 if (is_zero_ether_addr(p2p->peer_filter)) 3923 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Disable peer " 3924 "filter"); 3925 else 3926 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Enable peer " 3927 "filter for " MACSTR, MAC2STR(p2p->peer_filter)); 3928} 3929 3930 3931void p2p_set_cross_connect(struct p2p_data *p2p, int enabled) 3932{ 3933 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Cross connection %s", 3934 enabled ? "enabled" : "disabled"); 3935 if (p2p->cross_connect == enabled) 3936 return; 3937 p2p->cross_connect = enabled; 3938 /* TODO: may need to tear down any action group where we are GO(?) */ 3939} 3940 3941 3942int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr) 3943{ 3944 struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr); 3945 if (dev == NULL) 3946 return -1; 3947 if (dev->oper_freq <= 0) 3948 return -1; 3949 return dev->oper_freq; 3950} 3951 3952 3953void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled) 3954{ 3955 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Intra BSS distribution %s", 3956 enabled ? "enabled" : "disabled"); 3957 p2p->cfg->p2p_intra_bss = enabled; 3958} 3959 3960 3961void p2p_update_channel_list(struct p2p_data *p2p, struct p2p_channels *chan) 3962{ 3963 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Update channel list"); 3964 os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels)); 3965} 3966 3967 3968int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst, 3969 const u8 *src, const u8 *bssid, const u8 *buf, 3970 size_t len, unsigned int wait_time) 3971{ 3972 if (p2p->p2p_scan_running) { 3973 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Delay Action " 3974 "frame TX until p2p_scan completes"); 3975 if (p2p->after_scan_tx) { 3976 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Dropped " 3977 "previous pending Action frame TX"); 3978 os_free(p2p->after_scan_tx); 3979 } 3980 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) + 3981 len); 3982 if (p2p->after_scan_tx == NULL) 3983 return -1; 3984 p2p->after_scan_tx->freq = freq; 3985 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN); 3986 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN); 3987 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN); 3988 p2p->after_scan_tx->len = len; 3989 p2p->after_scan_tx->wait_time = wait_time; 3990 os_memcpy(p2p->after_scan_tx + 1, buf, len); 3991 return 0; 3992 } 3993 3994 return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid, 3995 buf, len, wait_time); 3996} 3997 3998 3999void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5, 4000 int freq_overall) 4001{ 4002 wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Best channel: 2.4 GHz: %d," 4003 " 5 GHz: %d, overall: %d", freq_24, freq_5, freq_overall); 4004 p2p->best_freq_24 = freq_24; 4005 p2p->best_freq_5 = freq_5; 4006 p2p->best_freq_overall = freq_overall; 4007} 4008 4009 4010const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p) 4011{ 4012 if (p2p == NULL || p2p->go_neg_peer == NULL) 4013 return NULL; 4014 return p2p->go_neg_peer->info.p2p_device_addr; 4015} 4016 4017 4018const struct p2p_peer_info * 4019p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next) 4020{ 4021 struct p2p_device *dev; 4022 4023 if (addr) { 4024 dev = p2p_get_device(p2p, addr); 4025 if (!dev) 4026 return NULL; 4027 4028 if (!next) { 4029 if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 4030 return NULL; 4031 4032 return &dev->info; 4033 } else { 4034 do { 4035 dev = dl_list_first(&dev->list, 4036 struct p2p_device, 4037 list); 4038 if (&dev->list == &p2p->devices) 4039 return NULL; 4040 } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY); 4041 } 4042 } else { 4043 dev = dl_list_first(&p2p->devices, struct p2p_device, list); 4044 if (!dev) 4045 return NULL; 4046 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) { 4047 dev = dl_list_first(&dev->list, 4048 struct p2p_device, 4049 list); 4050 if (&dev->list == &p2p->devices) 4051 return NULL; 4052 } 4053 } 4054 4055 return &dev->info; 4056} 4057 4058#ifdef ANDROID_P2P 4059int p2p_search_in_progress(struct p2p_data *p2p) 4060{ 4061 if (p2p == NULL) 4062 return 0; 4063 4064 return p2p->state == P2P_SEARCH; 4065} 4066#endif 4067 4068int p2p_in_progress(struct p2p_data *p2p) 4069{ 4070 if (p2p == NULL) 4071 return 0; 4072 return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING; 4073} 4074