src/p2p/p2p.c

   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
  21 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
  22 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
  23 static 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);
  26 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
  27                                       const u8 *sa, const u8 *data,
  28                                       size_t len);
  29 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
  30 static 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 #ifndef P2P_PEER_EXPIRATION_AGE
  46 #define P2P_PEER_EXPIRATION_AGE 60
  47 #endif /* P2P_PEER_EXPIRATION_AGE */
  48
  49 #define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2)
  50
  51 static void p2p_expire_peers(struct p2p_data *p2p)
  52 {
  53         struct p2p_device *dev, *n;
  54         struct os_reltime now;
  55         size_t i;
  56
  57         os_get_reltime(&now);
  58         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
  59                 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
  60                         continue;
  61
  62                 if (dev == p2p->go_neg_peer) {
  63                         /*
  64                          * GO Negotiation is in progress with the peer, so
  65                          * don't expire the peer entry until GO Negotiation
  66                          * fails or times out.
  67                          */
  68                         continue;
  69                 }
  70
  71                 if (p2p->cfg->go_connected &&
  72                     p2p->cfg->go_connected(p2p->cfg->cb_ctx,
  73                                            dev->info.p2p_device_addr)) {
  74                         /*
  75                          * We are connected as a client to a group in which the
  76                          * peer is the GO, so do not expire the peer entry.
  77                          */
  78                         os_get_reltime(&dev->last_seen);
  79                         continue;
  80                 }
  81
  82                 for (i = 0; i < p2p->num_groups; i++) {
  83                         if (p2p_group_is_client_connected(
  84                                     p2p->groups[i], dev->info.p2p_device_addr))
  85                                 break;
  86                 }
  87                 if (i < p2p->num_groups) {
  88                         /*
  89                          * The peer is connected as a client in a group where
  90                          * we are the GO, so do not expire the peer entry.
  91                          */
  92                         os_get_reltime(&dev->last_seen);
  93                         continue;
  94                 }
  95
  96                 p2p_dbg(p2p, "Expiring old peer entry " MACSTR,
  97                         MAC2STR(dev->info.p2p_device_addr));
  98                 dl_list_del(&dev->list);
  99                 p2p_device_free(p2p, dev);
 100         }
 101 }
 102
 103
 104 static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx)
 105 {
 106         struct p2p_data *p2p = eloop_ctx;
 107         p2p_expire_peers(p2p);
 108         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
 109                                p2p_expiration_timeout, p2p, NULL);
 110 }
 111
 112
 113 static const char * p2p_state_txt(int state)
 114 {
 115         switch (state) {
 116         case P2P_IDLE:
 117                 return "IDLE";
 118         case P2P_SEARCH:
 119                 return "SEARCH";
 120         case P2P_CONNECT:
 121                 return "CONNECT";
 122         case P2P_CONNECT_LISTEN:
 123                 return "CONNECT_LISTEN";
 124         case P2P_GO_NEG:
 125                 return "GO_NEG";
 126         case P2P_LISTEN_ONLY:
 127                 return "LISTEN_ONLY";
 128         case P2P_WAIT_PEER_CONNECT:
 129                 return "WAIT_PEER_CONNECT";
 130         case P2P_WAIT_PEER_IDLE:
 131                 return "WAIT_PEER_IDLE";
 132         case P2P_SD_DURING_FIND:
 133                 return "SD_DURING_FIND";
 134         case P2P_PROVISIONING:
 135                 return "PROVISIONING";
 136         case P2P_PD_DURING_FIND:
 137                 return "PD_DURING_FIND";
 138         case P2P_INVITE:
 139                 return "INVITE";
 140         case P2P_INVITE_LISTEN:
 141                 return "INVITE_LISTEN";
 142         default:
 143                 return "?";
 144         }
 145 }
 146
 147
 148 const char * p2p_get_state_txt(struct p2p_data *p2p)
 149 {
 150         return p2p_state_txt(p2p->state);
 151 }
 152
 153
 154 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 155 {
 156         struct p2p_device *dev = NULL;
 157
 158         if (!addr || !p2p)
 159                 return 0;
 160
 161         dev = p2p_get_device(p2p, addr);
 162         if (dev)
 163                 return dev->wps_prov_info;
 164         else
 165                 return 0;
 166 }
 167
 168
 169 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 170 {
 171         struct p2p_device *dev = NULL;
 172
 173         if (!addr || !p2p)
 174                 return;
 175
 176         dev = p2p_get_device(p2p, addr);
 177         if (dev)
 178                 dev->wps_prov_info = 0;
 179 }
 180
 181
 182 void p2p_set_state(struct p2p_data *p2p, int new_state)
 183 {
 184         p2p_dbg(p2p, "State %s -> %s",
 185                 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
 186         p2p->state = new_state;
 187
 188         if (new_state == P2P_IDLE && p2p->pending_channel) {
 189                 p2p_dbg(p2p, "Apply change in listen channel");
 190                 p2p->cfg->reg_class = p2p->pending_reg_class;
 191                 p2p->cfg->channel = p2p->pending_channel;
 192                 p2p->pending_reg_class = 0;
 193                 p2p->pending_channel = 0;
 194         }
 195 }
 196
 197
 198 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
 199 {
 200         p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
 201                 p2p_state_txt(p2p->state), sec, usec);
 202         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 203         eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
 204 }
 205
 206
 207 void p2p_clear_timeout(struct p2p_data *p2p)
 208 {
 209         p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
 210         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 211 }
 212
 213
 214 void p2p_go_neg_failed(struct p2p_data *p2p, int status)
 215 {
 216         struct p2p_go_neg_results res;
 217         struct p2p_device *peer = p2p->go_neg_peer;
 218
 219         if (!peer)
 220                 return;
 221
 222         p2p_clear_timeout(p2p);
 223         eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
 224         p2p_set_state(p2p, P2P_IDLE);
 225
 226         peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
 227         peer->wps_method = WPS_NOT_READY;
 228         peer->oob_pw_id = 0;
 229         wpabuf_free(peer->go_neg_conf);
 230         peer->go_neg_conf = NULL;
 231         p2p->go_neg_peer = NULL;
 232
 233         os_memset(&res, 0, sizeof(res));
 234         res.status = status;
 235         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
 236         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
 237         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
 238 }
 239
 240
 241 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
 242 {
 243         unsigned int r, tu;
 244         int freq;
 245         struct wpabuf *ies;
 246
 247         p2p_dbg(p2p, "Starting short listen state (state=%s)",
 248                 p2p_state_txt(p2p->state));
 249
 250         if (p2p->pending_listen_freq) {
 251                 /* We have a pending p2p_listen request */
 252                 p2p_dbg(p2p, "p2p_listen command pending already");
 253                 return;
 254         }
 255
 256         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 257         if (freq < 0) {
 258                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 259                 return;
 260         }
 261
 262         if (os_get_random((u8 *) &r, sizeof(r)) < 0)
 263                 r = 0;
 264         tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
 265               p2p->min_disc_int) * 100;
 266         if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
 267                 tu = p2p->max_disc_tu;
 268         if (!dev_disc && tu < 100)
 269                 tu = 100; /* Need to wait in non-device discovery use cases */
 270         if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
 271                 tu = p2p->cfg->max_listen * 1000 / 1024;
 272
 273         if (tu == 0) {
 274                 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
 275                 p2p_set_timeout(p2p, 0, 0);
 276                 return;
 277         }
 278
 279         ies = p2p_build_probe_resp_ies(p2p);
 280         if (ies == NULL)
 281                 return;
 282
 283         p2p->pending_listen_freq = freq;
 284         p2p->pending_listen_sec = 0;
 285         p2p->pending_listen_usec = 1024 * tu;
 286
 287         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
 288                     ies) < 0) {
 289                 p2p_dbg(p2p, "Failed to start listen mode");
 290                 p2p->pending_listen_freq = 0;
 291         }
 292         wpabuf_free(ies);
 293 }
 294
 295
 296 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
 297 {
 298         int freq;
 299         struct wpabuf *ies;
 300
 301         p2p_dbg(p2p, "Going to listen(only) state");
 302
 303         if (p2p->pending_listen_freq) {
 304                 /* We have a pending p2p_listen request */
 305                 p2p_dbg(p2p, "p2p_listen command pending already");
 306                 return -1;
 307         }
 308
 309         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 310         if (freq < 0) {
 311                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 312                 return -1;
 313         }
 314
 315         p2p->pending_listen_sec = timeout / 1000;
 316         p2p->pending_listen_usec = (timeout % 1000) * 1000;
 317
 318         if (p2p->p2p_scan_running) {
 319                 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
 320                         p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
 321                         return 0;
 322                 }
 323                 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
 324                 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
 325                 return 0;
 326         }
 327
 328         ies = p2p_build_probe_resp_ies(p2p);
 329         if (ies == NULL)
 330                 return -1;
 331
 332         p2p->pending_listen_freq = freq;
 333
 334         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
 335                 p2p_dbg(p2p, "Failed to start listen mode");
 336                 p2p->pending_listen_freq = 0;
 337                 wpabuf_free(ies);
 338                 return -1;
 339         }
 340         wpabuf_free(ies);
 341
 342         p2p_set_state(p2p, P2P_LISTEN_ONLY);
 343
 344         return 0;
 345 }
 346
 347
 348 static void p2p_device_clear_reported(struct p2p_data *p2p)
 349 {
 350         struct p2p_device *dev;
 351         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 352                 dev->flags &= ~P2P_DEV_REPORTED;
 353                 dev->sd_reqs = 0;
 354         }
 355 }
 356
 357
 358 /**
 359  * p2p_get_device - Fetch a peer entry
 360  * @p2p: P2P module context from p2p_init()
 361  * @addr: P2P Device Address of the peer
 362  * Returns: Pointer to the device entry or %NULL if not found
 363  */
 364 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
 365 {
 366         struct p2p_device *dev;
 367         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 368                 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
 369                         return dev;
 370         }
 371         return NULL;
 372 }
 373
 374
 375 /**
 376  * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
 377  * @p2p: P2P module context from p2p_init()
 378  * @addr: P2P Interface Address of the peer
 379  * Returns: Pointer to the device entry or %NULL if not found
 380  */
 381 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
 382                                              const u8 *addr)
 383 {
 384         struct p2p_device *dev;
 385         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 386                 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
 387                         return dev;
 388         }
 389         return NULL;
 390 }
 391
 392
 393 /**
 394  * p2p_create_device - Create a peer entry
 395  * @p2p: P2P module context from p2p_init()
 396  * @addr: P2P Device Address of the peer
 397  * Returns: Pointer to the device entry or %NULL on failure
 398  *
 399  * If there is already an entry for the peer, it will be returned instead of
 400  * creating a new one.
 401  */
 402 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
 403                                              const u8 *addr)
 404 {
 405         struct p2p_device *dev, *oldest = NULL;
 406         size_t count = 0;
 407
 408         dev = p2p_get_device(p2p, addr);
 409         if (dev)
 410                 return dev;
 411
 412         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 413                 count++;
 414                 if (oldest == NULL ||
 415                     os_reltime_before(&dev->last_seen, &oldest->last_seen))
 416                         oldest = dev;
 417         }
 418         if (count + 1 > p2p->cfg->max_peers && oldest) {
 419                 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
 420                 dl_list_del(&oldest->list);
 421                 p2p_device_free(p2p, oldest);
 422         }
 423
 424         dev = os_zalloc(sizeof(*dev));
 425         if (dev == NULL)
 426                 return NULL;
 427         dl_list_add(&p2p->devices, &dev->list);
 428         os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
 429
 430         return dev;
 431 }
 432
 433
 434 static void p2p_copy_client_info(struct p2p_device *dev,
 435                                  struct p2p_client_info *cli)
 436 {
 437         os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
 438         dev->info.device_name[cli->dev_name_len] = '\0';
 439         dev->info.dev_capab = cli->dev_capab;
 440         dev->info.config_methods = cli->config_methods;
 441         os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
 442         dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
 443         os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
 444                   dev->info.wps_sec_dev_type_list_len);
 445 }
 446
 447
 448 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
 449                                  const u8 *go_interface_addr, int freq,
 450                                  const u8 *gi, size_t gi_len)
 451 {
 452         struct p2p_group_info info;
 453         size_t c;
 454         struct p2p_device *dev;
 455
 456         if (gi == NULL)
 457                 return 0;
 458
 459         if (p2p_group_info_parse(gi, gi_len, &info) < 0)
 460                 return -1;
 461
 462         /*
 463          * Clear old data for this group; if the devices are still in the
 464          * group, the information will be restored in the loop following this.
 465          */
 466         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 467                 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
 468                               ETH_ALEN) == 0) {
 469                         os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
 470                         os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
 471                 }
 472         }
 473
 474         for (c = 0; c < info.num_clients; c++) {
 475                 struct p2p_client_info *cli = &info.client[c];
 476                 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
 477                               ETH_ALEN) == 0)
 478                         continue; /* ignore our own entry */
 479                 dev = p2p_get_device(p2p, cli->p2p_device_addr);
 480                 if (dev) {
 481                         if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
 482                                           P2P_DEV_PROBE_REQ_ONLY)) {
 483                                 /*
 484                                  * Update information since we have not
 485                                  * received this directly from the client.
 486                                  */
 487                                 p2p_copy_client_info(dev, cli);
 488                         } else {
 489                                 /*
 490                                  * Need to update P2P Client Discoverability
 491                                  * flag since it is valid only in P2P Group
 492                                  * Info attribute.
 493                                  */
 494                                 dev->info.dev_capab &=
 495                                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 496                                 dev->info.dev_capab |=
 497                                         cli->dev_capab &
 498                                         P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 499                         }
 500                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
 501                                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
 502                         }
 503                 } else {
 504                         dev = p2p_create_device(p2p, cli->p2p_device_addr);
 505                         if (dev == NULL)
 506                                 continue;
 507                         dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
 508                         p2p_copy_client_info(dev, cli);
 509                         dev->oper_freq = freq;
 510                         p2p->cfg->dev_found(p2p->cfg->cb_ctx,
 511                                             dev->info.p2p_device_addr,
 512                                             &dev->info, 1);
 513                         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 514                 }
 515
 516                 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
 517                           ETH_ALEN);
 518                 os_get_reltime(&dev->last_seen);
 519                 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
 520                 os_memcpy(dev->member_in_go_iface, go_interface_addr,
 521                           ETH_ALEN);
 522         }
 523
 524         return 0;
 525 }
 526
 527
 528 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
 529                               int probe_req, const struct p2p_message *msg)
 530 {
 531         os_memcpy(dev->info.device_name, msg->device_name,
 532                   sizeof(dev->info.device_name));
 533
 534         if (msg->manufacturer &&
 535             msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
 536                 os_memset(dev->info.manufacturer, 0,
 537                           sizeof(dev->info.manufacturer));
 538                 os_memcpy(dev->info.manufacturer, msg->manufacturer,
 539                           msg->manufacturer_len);
 540         }
 541
 542         if (msg->model_name &&
 543             msg->model_name_len < sizeof(dev->info.model_name)) {
 544                 os_memset(dev->info.model_name, 0,
 545                           sizeof(dev->info.model_name));
 546                 os_memcpy(dev->info.model_name, msg->model_name,
 547                           msg->model_name_len);
 548         }
 549
 550         if (msg->model_number &&
 551             msg->model_number_len < sizeof(dev->info.model_number)) {
 552                 os_memset(dev->info.model_number, 0,
 553                           sizeof(dev->info.model_number));
 554                 os_memcpy(dev->info.model_number, msg->model_number,
 555                           msg->model_number_len);
 556         }
 557
 558         if (msg->serial_number &&
 559             msg->serial_number_len < sizeof(dev->info.serial_number)) {
 560                 os_memset(dev->info.serial_number, 0,
 561                           sizeof(dev->info.serial_number));
 562                 os_memcpy(dev->info.serial_number, msg->serial_number,
 563                           msg->serial_number_len);
 564         }
 565
 566         if (msg->pri_dev_type)
 567                 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
 568                           sizeof(dev->info.pri_dev_type));
 569         else if (msg->wps_pri_dev_type)
 570                 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
 571                           sizeof(dev->info.pri_dev_type));
 572
 573         if (msg->wps_sec_dev_type_list) {
 574                 os_memcpy(dev->info.wps_sec_dev_type_list,
 575                           msg->wps_sec_dev_type_list,
 576                           msg->wps_sec_dev_type_list_len);
 577                 dev->info.wps_sec_dev_type_list_len =
 578                         msg->wps_sec_dev_type_list_len;
 579         }
 580
 581         if (msg->capability) {
 582                 /*
 583                  * P2P Client Discoverability bit is reserved in all frames
 584                  * that use this function, so do not change its value here.
 585                  */
 586                 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 587                 dev->info.dev_capab |= msg->capability[0] &
 588                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 589                 dev->info.group_capab = msg->capability[1];
 590         }
 591
 592         if (msg->ext_listen_timing) {
 593                 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
 594                 dev->ext_listen_interval =
 595                         WPA_GET_LE16(msg->ext_listen_timing + 2);
 596         }
 597
 598         if (!probe_req) {
 599                 u16 new_config_methods;
 600                 new_config_methods = msg->config_methods ?
 601                         msg->config_methods : msg->wps_config_methods;
 602                 if (new_config_methods &&
 603                     dev->info.config_methods != new_config_methods) {
 604                         p2p_dbg(p2p, "Update peer " MACSTR
 605                                 " config_methods 0x%x -> 0x%x",
 606                                 MAC2STR(dev->info.p2p_device_addr),
 607                                 dev->info.config_methods,
 608                                 new_config_methods);
 609                         dev->info.config_methods = new_config_methods;
 610                 }
 611         }
 612 }
 613
 614
 615 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies,
 616                                          size_t ies_len)
 617 {
 618         const u8 *pos, *end;
 619         u8 id, len;
 620
 621         wpabuf_free(dev->info.vendor_elems);
 622         dev->info.vendor_elems = NULL;
 623
 624         end = ies + ies_len;
 625
 626         for (pos = ies; pos + 1 < end; pos += len) {
 627                 id = *pos++;
 628                 len = *pos++;
 629
 630                 if (pos + len > end)
 631                         break;
 632
 633                 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3)
 634                         continue;
 635
 636                 if (len >= 4) {
 637                         u32 type = WPA_GET_BE32(pos);
 638
 639                         if (type == WPA_IE_VENDOR_TYPE ||
 640                             type == WMM_IE_VENDOR_TYPE ||
 641                             type == WPS_IE_VENDOR_TYPE ||
 642                             type == P2P_IE_VENDOR_TYPE ||
 643                             type == WFD_IE_VENDOR_TYPE)
 644                                 continue;
 645                 }
 646
 647                 /* Unknown vendor element - make raw IE data available */
 648                 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0)
 649                         break;
 650                 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len);
 651         }
 652 }
 653
 654
 655 static int p2p_compare_wfd_info(struct p2p_device *dev,
 656                               const struct p2p_message *msg)
 657 {
 658         if (dev->info.wfd_subelems && msg->wfd_subelems) {
 659                 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used)
 660                         return 1;
 661
 662                 return os_memcmp(dev->info.wfd_subelems->buf,
 663                                  msg->wfd_subelems->buf,
 664                                  dev->info.wfd_subelems->used);
 665         }
 666         if (dev->info.wfd_subelems || msg->wfd_subelems)
 667                 return 1;
 668
 669         return 0;
 670 }
 671
 672
 673 /**
 674  * p2p_add_device - Add peer entries based on scan results or P2P frames
 675  * @p2p: P2P module context from p2p_init()
 676  * @addr: Source address of Beacon or Probe Response frame (may be either
 677  *      P2P Device Address or P2P Interface Address)
 678  * @level: Signal level (signal strength of the received frame from the peer)
 679  * @freq: Frequency on which the Beacon or Probe Response frame was received
 680  * @rx_time: Time when the result was received
 681  * @ies: IEs from the Beacon or Probe Response frame
 682  * @ies_len: Length of ies buffer in octets
 683  * @scan_res: Whether this was based on scan results
 684  * Returns: 0 on success, -1 on failure
 685  *
 686  * If the scan result is for a GO, the clients in the group will also be added
 687  * to the peer table. This function can also be used with some other frames
 688  * like Provision Discovery Request that contains P2P Capability and P2P Device
 689  * Info attributes.
 690  */
 691 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
 692                    struct os_reltime *rx_time, int level, const u8 *ies,
 693                    size_t ies_len, int scan_res)
 694 {
 695         struct p2p_device *dev;
 696         struct p2p_message msg;
 697         const u8 *p2p_dev_addr;
 698         int wfd_changed;
 699         int i;
 700         struct os_reltime time_now;
 701
 702         os_memset(&msg, 0, sizeof(msg));
 703         if (p2p_parse_ies(ies, ies_len, &msg)) {
 704                 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
 705                 p2p_parse_free(&msg);
 706                 return -1;
 707         }
 708
 709         if (msg.p2p_device_addr)
 710                 p2p_dev_addr = msg.p2p_device_addr;
 711         else if (msg.device_id)
 712                 p2p_dev_addr = msg.device_id;
 713         else {
 714                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
 715                 p2p_parse_free(&msg);
 716                 return -1;
 717         }
 718
 719         if (!is_zero_ether_addr(p2p->peer_filter) &&
 720             os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
 721                 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
 722                         " due to peer filter", MAC2STR(p2p_dev_addr));
 723                 p2p_parse_free(&msg);
 724                 return 0;
 725         }
 726
 727         dev = p2p_create_device(p2p, p2p_dev_addr);
 728         if (dev == NULL) {
 729                 p2p_parse_free(&msg);
 730                 return -1;
 731         }
 732
 733         if (rx_time == NULL) {
 734                 os_get_reltime(&time_now);
 735                 rx_time = &time_now;
 736         }
 737
 738         /*
 739          * Update the device entry only if the new peer
 740          * entry is newer than the one previously stored.
 741          */
 742         if (dev->last_seen.sec > 0 &&
 743             os_reltime_before(rx_time, &dev->last_seen)) {
 744                 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)",
 745                         (unsigned int) rx_time->sec,
 746                         (unsigned int) rx_time->usec,
 747                         (unsigned int) dev->last_seen.sec,
 748                         (unsigned int) dev->last_seen.usec);
 749                 p2p_parse_free(&msg);
 750                 return -1;
 751         }
 752
 753         os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
 754
 755         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
 756
 757         if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
 758                 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
 759         if (msg.ssid &&
 760             (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
 761              os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
 762              != 0)) {
 763                 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
 764                 dev->oper_ssid_len = msg.ssid[1];
 765         }
 766
 767         if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
 768             *msg.ds_params >= 1 && *msg.ds_params <= 14) {
 769                 int ds_freq;
 770                 if (*msg.ds_params == 14)
 771                         ds_freq = 2484;
 772                 else
 773                         ds_freq = 2407 + *msg.ds_params * 5;
 774                 if (freq != ds_freq) {
 775                         p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
 776                                 freq, ds_freq);
 777                         freq = ds_freq;
 778                 }
 779         }
 780
 781         if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
 782                 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
 783                         MACSTR " %d -> %d MHz (DS param %d)",
 784                         MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
 785                         freq, msg.ds_params ? *msg.ds_params : -1);
 786         }
 787         if (scan_res) {
 788                 dev->listen_freq = freq;
 789                 if (msg.group_info)
 790                         dev->oper_freq = freq;
 791         }
 792         dev->info.level = level;
 793
 794         p2p_copy_wps_info(p2p, dev, 0, &msg);
 795
 796         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 797                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 798                 dev->info.wps_vendor_ext[i] = NULL;
 799         }
 800
 801         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 802                 if (msg.wps_vendor_ext[i] == NULL)
 803                         break;
 804                 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
 805                         msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
 806                 if (dev->info.wps_vendor_ext[i] == NULL)
 807                         break;
 808         }
 809
 810         wfd_changed = p2p_compare_wfd_info(dev, &msg);
 811
 812         if (msg.wfd_subelems) {
 813                 wpabuf_free(dev->info.wfd_subelems);
 814                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
 815         }
 816
 817         if (scan_res) {
 818                 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
 819                                       msg.group_info, msg.group_info_len);
 820         }
 821
 822         p2p_parse_free(&msg);
 823
 824         p2p_update_peer_vendor_elems(dev, ies, ies_len);
 825
 826         if (dev->flags & P2P_DEV_REPORTED && !wfd_changed)
 827                 return 0;
 828
 829         p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
 830                 freq, (unsigned int) rx_time->sec,
 831                 (unsigned int) rx_time->usec);
 832         if (dev->flags & P2P_DEV_USER_REJECTED) {
 833                 p2p_dbg(p2p, "Do not report rejected device");
 834                 return 0;
 835         }
 836
 837         if (dev->info.config_methods == 0 &&
 838             (freq == 2412 || freq == 2437 || freq == 2462)) {
 839                 /*
 840                  * If we have only seen a Beacon frame from a GO, we do not yet
 841                  * know what WPS config methods it supports. Since some
 842                  * applications use config_methods value from P2P-DEVICE-FOUND
 843                  * events, postpone reporting this peer until we've fully
 844                  * discovered its capabilities.
 845                  *
 846                  * At least for now, do this only if the peer was detected on
 847                  * one of the social channels since that peer can be easily be
 848                  * found again and there are no limitations of having to use
 849                  * passive scan on this channels, so this can be done through
 850                  * Probe Response frame that includes the config_methods
 851                  * information.
 852                  */
 853                 p2p_dbg(p2p, "Do not report peer " MACSTR
 854                         " with unknown config methods", MAC2STR(addr));
 855                 return 0;
 856         }
 857
 858         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
 859                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
 860         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 861
 862         return 0;
 863 }
 864
 865
 866 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
 867 {
 868         int i;
 869
 870         if (p2p->go_neg_peer == dev) {
 871                 /*
 872                  * If GO Negotiation is in progress, report that it has failed.
 873                  */
 874                 p2p_go_neg_failed(p2p, -1);
 875         }
 876         if (p2p->invite_peer == dev)
 877                 p2p->invite_peer = NULL;
 878         if (p2p->sd_peer == dev)
 879                 p2p->sd_peer = NULL;
 880         if (p2p->pending_client_disc_go == dev)
 881                 p2p->pending_client_disc_go = NULL;
 882
 883         /* dev_lost() device, but only if it was previously dev_found() */
 884         if (dev->flags & P2P_DEV_REPORTED_ONCE)
 885                 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
 886                                    dev->info.p2p_device_addr);
 887
 888         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 889                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 890                 dev->info.wps_vendor_ext[i] = NULL;
 891         }
 892
 893         wpabuf_free(dev->info.wfd_subelems);
 894         wpabuf_free(dev->info.vendor_elems);
 895         wpabuf_free(dev->go_neg_conf);
 896
 897         os_free(dev);
 898 }
 899
 900
 901 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
 902 {
 903         struct p2p_channels *c;
 904         struct p2p_reg_class *cla;
 905         size_t cl, ch;
 906         int found = 0;
 907         u8 reg_class;
 908         u8 channel;
 909         int freq;
 910
 911         c = &p2p->cfg->channels;
 912         for (cl = 0; cl < c->reg_classes; cl++) {
 913                 cla = &c->reg_class[cl];
 914                 if (cla->reg_class != p2p->last_prog_scan_class)
 915                         continue;
 916                 for (ch = 0; ch < cla->channels; ch++) {
 917                         if (cla->channel[ch] == p2p->last_prog_scan_chan) {
 918                                 found = 1;
 919                                 break;
 920                         }
 921                 }
 922                 if (found)
 923                         break;
 924         }
 925
 926         if (!found) {
 927                 /* Start from beginning */
 928                 reg_class = c->reg_class[0].reg_class;
 929                 channel = c->reg_class[0].channel[0];
 930         } else {
 931                 /* Pick the next channel */
 932                 ch++;
 933                 if (ch == cla->channels) {
 934                         cl++;
 935                         if (cl == c->reg_classes)
 936                                 cl = 0;
 937                         ch = 0;
 938                 }
 939                 reg_class = c->reg_class[cl].reg_class;
 940                 channel = c->reg_class[cl].channel[ch];
 941         }
 942
 943         freq = p2p_channel_to_freq(reg_class, channel);
 944         p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
 945                 reg_class, channel, freq);
 946         p2p->last_prog_scan_class = reg_class;
 947         p2p->last_prog_scan_chan = channel;
 948
 949         if (freq == 2412 || freq == 2437 || freq == 2462)
 950                 return 0; /* No need to add social channels */
 951         return freq;
 952 }
 953
 954
 955 static void p2p_search(struct p2p_data *p2p)
 956 {
 957         int freq = 0;
 958         enum p2p_scan_type type;
 959         u16 pw_id = DEV_PW_DEFAULT;
 960         int res;
 961
 962         if (p2p->drv_in_listen) {
 963                 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
 964                 return;
 965         }
 966         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
 967
 968         if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
 969             (freq = p2p_get_next_prog_freq(p2p)) > 0) {
 970                 type = P2P_SCAN_SOCIAL_PLUS_ONE;
 971                 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
 972         } else {
 973                 type = P2P_SCAN_SOCIAL;
 974                 p2p_dbg(p2p, "Starting search");
 975         }
 976
 977         res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
 978                                  p2p->num_req_dev_types, p2p->req_dev_types,
 979                                  p2p->find_dev_id, pw_id);
 980         if (res < 0) {
 981                 p2p_dbg(p2p, "Scan request schedule failed");
 982                 p2p_continue_find(p2p);
 983         }
 984 }
 985
 986
 987 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
 988 {
 989         struct p2p_data *p2p = eloop_ctx;
 990         p2p_dbg(p2p, "Find timeout -> stop");
 991         p2p_stop_find(p2p);
 992 }
 993
 994
 995 void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status)
 996 {
 997         if (status != 0) {
 998                 p2p_dbg(p2p, "Scan request failed");
 999                 /* Do continue find even for the first p2p_find_scan */
1000                 p2p_continue_find(p2p);
1001         } else {
1002                 p2p_dbg(p2p, "Running p2p_scan");
1003                 p2p->p2p_scan_running = 1;
1004                 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1005                 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1006                                        p2p, NULL);
1007         }
1008 }
1009
1010
1011 static int p2p_run_after_scan(struct p2p_data *p2p)
1012 {
1013         struct p2p_device *dev;
1014         enum p2p_after_scan op;
1015
1016         if (p2p->after_scan_tx) {
1017                 p2p->after_scan_tx_in_progress = 1;
1018                 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
1019                 p2p->cfg->send_action(p2p->cfg->cb_ctx,
1020                                       p2p->after_scan_tx->freq,
1021                                       p2p->after_scan_tx->dst,
1022                                       p2p->after_scan_tx->src,
1023                                       p2p->after_scan_tx->bssid,
1024                                       (u8 *) (p2p->after_scan_tx + 1),
1025                                       p2p->after_scan_tx->len,
1026                                       p2p->after_scan_tx->wait_time);
1027                 os_free(p2p->after_scan_tx);
1028                 p2p->after_scan_tx = NULL;
1029                 return 1;
1030         }
1031
1032         op = p2p->start_after_scan;
1033         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1034         switch (op) {
1035         case P2P_AFTER_SCAN_NOTHING:
1036                 break;
1037         case P2P_AFTER_SCAN_LISTEN:
1038                 p2p_dbg(p2p, "Start previously requested Listen state");
1039                 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
1040                            p2p->pending_listen_usec / 1000);
1041                 return 1;
1042         case P2P_AFTER_SCAN_CONNECT:
1043                 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
1044                         MAC2STR(p2p->after_scan_peer));
1045                 dev = p2p_get_device(p2p, p2p->after_scan_peer);
1046                 if (dev == NULL) {
1047                         p2p_dbg(p2p, "Peer not known anymore");
1048                         break;
1049                 }
1050                 p2p_connect_send(p2p, dev);
1051                 return 1;
1052         }
1053
1054         return 0;
1055 }
1056
1057
1058 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1059 {
1060         struct p2p_data *p2p = eloop_ctx;
1061         int running;
1062         p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
1063         running = p2p->p2p_scan_running;
1064         /* Make sure we recover from missed scan results callback */
1065         p2p->p2p_scan_running = 0;
1066
1067         if (running)
1068                 p2p_run_after_scan(p2p);
1069 }
1070
1071
1072 static void p2p_free_req_dev_types(struct p2p_data *p2p)
1073 {
1074         p2p->num_req_dev_types = 0;
1075         os_free(p2p->req_dev_types);
1076         p2p->req_dev_types = NULL;
1077 }
1078
1079
1080 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
1081              enum p2p_discovery_type type,
1082              unsigned int num_req_dev_types, const u8 *req_dev_types,
1083              const u8 *dev_id, unsigned int search_delay)
1084 {
1085         int res;
1086
1087         p2p_dbg(p2p, "Starting find (type=%d)", type);
1088         os_get_reltime(&p2p->find_start);
1089         if (p2p->p2p_scan_running) {
1090                 p2p_dbg(p2p, "p2p_scan is already running");
1091         }
1092
1093         p2p_free_req_dev_types(p2p);
1094         if (req_dev_types && num_req_dev_types) {
1095                 p2p->req_dev_types = os_malloc(num_req_dev_types *
1096                                                WPS_DEV_TYPE_LEN);
1097                 if (p2p->req_dev_types == NULL)
1098                         return -1;
1099                 os_memcpy(p2p->req_dev_types, req_dev_types,
1100                           num_req_dev_types * WPS_DEV_TYPE_LEN);
1101                 p2p->num_req_dev_types = num_req_dev_types;
1102         }
1103
1104         if (dev_id) {
1105                 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1106                 p2p->find_dev_id = p2p->find_dev_id_buf;
1107         } else
1108                 p2p->find_dev_id = NULL;
1109
1110         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1111         p2p_clear_timeout(p2p);
1112         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1113         p2p->find_type = type;
1114         p2p_device_clear_reported(p2p);
1115         p2p_set_state(p2p, P2P_SEARCH);
1116         p2p->search_delay = search_delay;
1117         p2p->in_search_delay = 0;
1118         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1119         p2p->last_p2p_find_timeout = timeout;
1120         if (timeout)
1121                 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1122                                        p2p, NULL);
1123         switch (type) {
1124         case P2P_FIND_START_WITH_FULL:
1125         case P2P_FIND_PROGRESSIVE:
1126                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1127                                          p2p->num_req_dev_types,
1128                                          p2p->req_dev_types, dev_id,
1129                                          DEV_PW_DEFAULT);
1130                 break;
1131         case P2P_FIND_ONLY_SOCIAL:
1132                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1133                                          p2p->num_req_dev_types,
1134                                          p2p->req_dev_types, dev_id,
1135                                          DEV_PW_DEFAULT);
1136                 break;
1137         default:
1138                 return -1;
1139         }
1140
1141         if (res != 0 && p2p->p2p_scan_running) {
1142                 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
1143                 /* wait for the previous p2p_scan to complete */
1144                 res = 0; /* do not report failure */
1145         } else if (res != 0) {
1146                 p2p_dbg(p2p, "Failed to start p2p_scan");
1147                 p2p_set_state(p2p, P2P_IDLE);
1148                 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1149         }
1150
1151         return res;
1152 }
1153
1154
1155 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1156 {
1157         p2p_dbg(p2p, "Stopping find");
1158         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1159         p2p_clear_timeout(p2p);
1160         if (p2p->state == P2P_SEARCH)
1161                 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1162         p2p_set_state(p2p, P2P_IDLE);
1163         p2p_free_req_dev_types(p2p);
1164         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1165         if (p2p->go_neg_peer)
1166                 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1167         p2p->go_neg_peer = NULL;
1168         p2p->sd_peer = NULL;
1169         p2p->invite_peer = NULL;
1170         p2p_stop_listen_for_freq(p2p, freq);
1171 }
1172
1173
1174 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1175 {
1176         if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1177                 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1178                 return;
1179         }
1180         if (p2p->in_listen) {
1181                 p2p->in_listen = 0;
1182                 p2p_clear_timeout(p2p);
1183         }
1184         if (p2p->drv_in_listen) {
1185                 /*
1186                  * The driver may not deliver callback to p2p_listen_end()
1187                  * when the operation gets canceled, so clear the internal
1188                  * variable that is tracking driver state.
1189                  */
1190                 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1191                 p2p->drv_in_listen = 0;
1192         }
1193         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1194 }
1195
1196
1197 void p2p_stop_listen(struct p2p_data *p2p)
1198 {
1199         if (p2p->state != P2P_LISTEN_ONLY) {
1200                 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1201                 return;
1202         }
1203
1204         p2p_stop_listen_for_freq(p2p, 0);
1205         p2p_set_state(p2p, P2P_IDLE);
1206 }
1207
1208
1209 void p2p_stop_find(struct p2p_data *p2p)
1210 {
1211         p2p->pending_listen_freq = 0;
1212         p2p_stop_find_for_freq(p2p, 0);
1213 }
1214
1215
1216 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1217                                     unsigned int force_freq,
1218                                     unsigned int pref_freq, int go)
1219 {
1220         u8 op_class, op_channel;
1221         unsigned int freq = force_freq ? force_freq : pref_freq;
1222
1223         p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
1224                 force_freq, pref_freq, go);
1225         if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1226                 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1227                 return -1;
1228         }
1229
1230         if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
1231             (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
1232                                           op_channel))) {
1233                 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1234                         freq, op_class, op_channel);
1235                 return -1;
1236         }
1237
1238         p2p->op_reg_class = op_class;
1239         p2p->op_channel = op_channel;
1240
1241         if (force_freq) {
1242                 p2p->channels.reg_classes = 1;
1243                 p2p->channels.reg_class[0].channels = 1;
1244                 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1245                 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1246         } else {
1247                 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1248                           sizeof(struct p2p_channels));
1249         }
1250
1251         return 0;
1252 }
1253
1254
1255 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1256 {
1257         u8 op_class, op_channel;
1258         const int op_classes_5ghz[] = { 124, 115, 0 };
1259         const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
1260         const int op_classes_vht[] = { 128, 0 };
1261
1262         p2p_dbg(p2p, "Prepare channel best");
1263
1264         if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1265             p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1266             p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1267             == 0) {
1268                 p2p_dbg(p2p, "Select best overall channel as operating channel preference");
1269                 p2p->op_reg_class = op_class;
1270                 p2p->op_channel = op_channel;
1271         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1272                    p2p_supported_freq(p2p, p2p->best_freq_5) &&
1273                    p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1274                    == 0) {
1275                 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1276                 p2p->op_reg_class = op_class;
1277                 p2p->op_channel = op_channel;
1278         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1279                    p2p_supported_freq(p2p, p2p->best_freq_24) &&
1280                    p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1281                                        &op_channel) == 0) {
1282                 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1283                 p2p->op_reg_class = op_class;
1284                 p2p->op_channel = op_channel;
1285         } else if (p2p->cfg->num_pref_chan > 0 &&
1286                    p2p_channels_includes(&p2p->cfg->channels,
1287                                          p2p->cfg->pref_chan[0].op_class,
1288                                          p2p->cfg->pref_chan[0].chan)) {
1289                 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1290                 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1291                 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1292         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
1293                                       &p2p->op_reg_class, &p2p->op_channel) ==
1294                    0) {
1295                 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
1296                         p2p->op_reg_class, p2p->op_channel);
1297         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
1298                                       &p2p->op_reg_class, &p2p->op_channel) ==
1299                    0) {
1300                 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
1301                         p2p->op_reg_class, p2p->op_channel);
1302         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
1303                                       &p2p->op_reg_class, &p2p->op_channel) ==
1304                    0) {
1305                 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
1306                         p2p->op_reg_class, p2p->op_channel);
1307         } else if (p2p_channels_includes(&p2p->cfg->channels,
1308                                          p2p->cfg->op_reg_class,
1309                                          p2p->cfg->op_channel)) {
1310                 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1311                 p2p->op_reg_class = p2p->cfg->op_reg_class;
1312                 p2p->op_channel = p2p->cfg->op_channel;
1313         } else if (p2p_channel_random_social(&p2p->cfg->channels,
1314                                              &p2p->op_reg_class,
1315                                              &p2p->op_channel) == 0) {
1316                 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference",
1317                         p2p->op_reg_class, p2p->op_channel);
1318         } else {
1319                 /* Select any random available channel from the first available
1320                  * operating class */
1321                 p2p_channel_select(&p2p->cfg->channels, NULL,
1322                                    &p2p->op_reg_class,
1323                                    &p2p->op_channel);
1324                 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
1325                         p2p->op_channel, p2p->op_reg_class);
1326         }
1327
1328         os_memcpy(&p2p->channels, &p2p->cfg->channels,
1329                   sizeof(struct p2p_channels));
1330 }
1331
1332
1333 /**
1334  * p2p_prepare_channel - Select operating channel for GO Negotiation
1335  * @p2p: P2P module context from p2p_init()
1336  * @dev: Selected peer device
1337  * @force_freq: Forced frequency in MHz or 0 if not forced
1338  * @pref_freq: Preferred frequency in MHz or 0 if no preference
1339  * @go: Whether the local end will be forced to be GO
1340  * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1341  *
1342  * This function is used to do initial operating channel selection for GO
1343  * Negotiation prior to having received peer information. The selected channel
1344  * may be further optimized in p2p_reselect_channel() once the peer information
1345  * is available.
1346  */
1347 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1348                         unsigned int force_freq, unsigned int pref_freq, int go)
1349 {
1350         p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1351                 force_freq, pref_freq, go);
1352         if (force_freq || pref_freq) {
1353                 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1354                     0)
1355                         return -1;
1356         } else {
1357                 p2p_prepare_channel_best(p2p);
1358         }
1359         p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1360         if (go)
1361                 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1362         else if (!force_freq)
1363                 p2p_channels_union(&p2p->channels, &p2p->cfg->cli_channels,
1364                                    &p2p->channels);
1365         p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1366
1367         p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1368                 p2p->op_reg_class, p2p->op_channel,
1369                 force_freq ? " (forced)" : "");
1370
1371         if (force_freq)
1372                 dev->flags |= P2P_DEV_FORCE_FREQ;
1373         else
1374                 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1375
1376         return 0;
1377 }
1378
1379
1380 static void p2p_set_dev_persistent(struct p2p_device *dev,
1381                                    int persistent_group)
1382 {
1383         switch (persistent_group) {
1384         case 0:
1385                 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1386                                 P2P_DEV_PREFER_PERSISTENT_RECONN);
1387                 break;
1388         case 1:
1389                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1390                 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1391                 break;
1392         case 2:
1393                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1394                         P2P_DEV_PREFER_PERSISTENT_RECONN;
1395                 break;
1396         }
1397 }
1398
1399
1400 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1401                 enum p2p_wps_method wps_method,
1402                 int go_intent, const u8 *own_interface_addr,
1403                 unsigned int force_freq, int persistent_group,
1404                 const u8 *force_ssid, size_t force_ssid_len,
1405                 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1406 {
1407         struct p2p_device *dev;
1408
1409         p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1410                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1411                 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1412                 "oob_pw_id=%u",
1413                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1414                 wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
1415
1416         dev = p2p_get_device(p2p, peer_addr);
1417         if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1418                 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1419                         MAC2STR(peer_addr));
1420                 return -1;
1421         }
1422
1423         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1424                                 go_intent == 15) < 0)
1425                 return -1;
1426
1427         if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1428                 if (!(dev->info.dev_capab &
1429                       P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1430                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1431                                 " that is in a group and is not discoverable",
1432                                 MAC2STR(peer_addr));
1433                         return -1;
1434                 }
1435                 if (dev->oper_freq <= 0) {
1436                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1437                                 " with incomplete information",
1438                                 MAC2STR(peer_addr));
1439                         return -1;
1440                 }
1441
1442                 /*
1443                  * First, try to connect directly. If the peer does not
1444                  * acknowledge frames, assume it is sleeping and use device
1445                  * discoverability via the GO at that point.
1446                  */
1447         }
1448
1449         p2p->ssid_set = 0;
1450         if (force_ssid) {
1451                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1452                                   force_ssid, force_ssid_len);
1453                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1454                 p2p->ssid_len = force_ssid_len;
1455                 p2p->ssid_set = 1;
1456         }
1457
1458         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1459         dev->flags &= ~P2P_DEV_USER_REJECTED;
1460         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1461         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1462         if (pd_before_go_neg)
1463                 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1464         else {
1465                 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1466                 /*
1467                  * Assign dialog token and tie breaker here to use the same
1468                  * values in each retry within the same GO Negotiation exchange.
1469                  */
1470                 dev->dialog_token++;
1471                 if (dev->dialog_token == 0)
1472                         dev->dialog_token = 1;
1473                 dev->tie_breaker = p2p->next_tie_breaker;
1474                 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1475         }
1476         dev->connect_reqs = 0;
1477         dev->go_neg_req_sent = 0;
1478         dev->go_state = UNKNOWN_GO;
1479         p2p_set_dev_persistent(dev, persistent_group);
1480         p2p->go_intent = go_intent;
1481         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1482
1483         if (p2p->state != P2P_IDLE)
1484                 p2p_stop_find(p2p);
1485
1486         if (p2p->after_scan_tx) {
1487                 /*
1488                  * We need to drop the pending frame to avoid issues with the
1489                  * new GO Negotiation, e.g., when the pending frame was from a
1490                  * previous attempt at starting a GO Negotiation.
1491                  */
1492                 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1493                 os_free(p2p->after_scan_tx);
1494                 p2p->after_scan_tx = NULL;
1495         }
1496
1497         dev->wps_method = wps_method;
1498         dev->oob_pw_id = oob_pw_id;
1499         dev->status = P2P_SC_SUCCESS;
1500
1501         if (p2p->p2p_scan_running) {
1502                 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1503                 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1504                 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1505                 return 0;
1506         }
1507         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1508
1509         return p2p_connect_send(p2p, dev);
1510 }
1511
1512
1513 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1514                   enum p2p_wps_method wps_method,
1515                   int go_intent, const u8 *own_interface_addr,
1516                   unsigned int force_freq, int persistent_group,
1517                   const u8 *force_ssid, size_t force_ssid_len,
1518                   unsigned int pref_freq, u16 oob_pw_id)
1519 {
1520         struct p2p_device *dev;
1521
1522         p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1523                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1524                 " wps_method=%d  persistent_group=%d oob_pw_id=%u",
1525                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1526                 wps_method, persistent_group, oob_pw_id);
1527
1528         dev = p2p_get_device(p2p, peer_addr);
1529         if (dev == NULL) {
1530                 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1531                         MAC2STR(peer_addr));
1532                 return -1;
1533         }
1534
1535         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1536                                 15) < 0)
1537                 return -1;
1538
1539         p2p->ssid_set = 0;
1540         if (force_ssid) {
1541                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1542                                   force_ssid, force_ssid_len);
1543                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1544                 p2p->ssid_len = force_ssid_len;
1545                 p2p->ssid_set = 1;
1546         }
1547
1548         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1549         dev->flags &= ~P2P_DEV_USER_REJECTED;
1550         dev->go_neg_req_sent = 0;
1551         dev->go_state = UNKNOWN_GO;
1552         p2p_set_dev_persistent(dev, persistent_group);
1553         p2p->go_intent = go_intent;
1554         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1555
1556         dev->wps_method = wps_method;
1557         dev->oob_pw_id = oob_pw_id;
1558         dev->status = P2P_SC_SUCCESS;
1559
1560         return 0;
1561 }
1562
1563
1564 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1565                       struct p2p_device *dev, struct p2p_message *msg)
1566 {
1567         os_get_reltime(&dev->last_seen);
1568
1569         p2p_copy_wps_info(p2p, dev, 0, msg);
1570
1571         if (msg->listen_channel) {
1572                 int freq;
1573                 freq = p2p_channel_to_freq(msg->listen_channel[3],
1574                                            msg->listen_channel[4]);
1575                 if (freq < 0) {
1576                         p2p_dbg(p2p, "Unknown peer Listen channel: "
1577                                 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1578                                 msg->listen_channel[0],
1579                                 msg->listen_channel[1],
1580                                 msg->listen_channel[2],
1581                                 msg->listen_channel[3],
1582                                 msg->listen_channel[4]);
1583                 } else {
1584                         p2p_dbg(p2p, "Update peer " MACSTR
1585                                 " Listen channel: %u -> %u MHz",
1586                                 MAC2STR(dev->info.p2p_device_addr),
1587                                 dev->listen_freq, freq);
1588                         dev->listen_freq = freq;
1589                 }
1590         }
1591
1592         if (msg->wfd_subelems) {
1593                 wpabuf_free(dev->info.wfd_subelems);
1594                 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1595         }
1596
1597         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1598                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1599                 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1600         } else {
1601                 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1602                         MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1603                         "listen_freq=%d",
1604                         MAC2STR(dev->info.p2p_device_addr),
1605                         dev->info.dev_capab, dev->info.group_capab,
1606                         dev->info.device_name, dev->listen_freq);
1607         }
1608
1609         dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1610
1611         if (dev->flags & P2P_DEV_USER_REJECTED) {
1612                 p2p_dbg(p2p, "Do not report rejected device");
1613                 return;
1614         }
1615
1616         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1617                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
1618         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1619 }
1620
1621
1622 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1623 {
1624         os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1625         p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1626         os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1627                   p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1628         *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1629 }
1630
1631
1632 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1633 {
1634         p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
1635         p2p_random(params->passphrase, p2p->cfg->passphrase_len);
1636         return 0;
1637 }
1638
1639
1640 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1641 {
1642         struct p2p_go_neg_results res;
1643         int go = peer->go_state == LOCAL_GO;
1644         struct p2p_channels intersection;
1645
1646         p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1647                 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1648
1649         os_memset(&res, 0, sizeof(res));
1650         res.role_go = go;
1651         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1652         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1653         res.wps_method = peer->wps_method;
1654         if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1655                 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1656                         res.persistent_group = 2;
1657                 else
1658                         res.persistent_group = 1;
1659         }
1660
1661         if (go) {
1662                 /* Setup AP mode for WPS provisioning */
1663                 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1664                                                p2p->op_channel);
1665                 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1666                 res.ssid_len = p2p->ssid_len;
1667                 p2p_random(res.passphrase, p2p->cfg->passphrase_len);
1668         } else {
1669                 res.freq = peer->oper_freq;
1670                 if (p2p->ssid_len) {
1671                         os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1672                         res.ssid_len = p2p->ssid_len;
1673                 }
1674         }
1675
1676         p2p_channels_dump(p2p, "own channels", &p2p->channels);
1677         p2p_channels_dump(p2p, "peer channels", &peer->channels);
1678         p2p_channels_intersect(&p2p->channels, &peer->channels,
1679                                &intersection);
1680         if (go) {
1681                 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1682                 p2p_channels_dump(p2p, "intersection after no-GO removal",
1683                                   &intersection);
1684         }
1685
1686         p2p_channels_to_freqs(&intersection, res.freq_list,
1687                               P2P_MAX_CHANNELS);
1688
1689         res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1690
1691         p2p_clear_timeout(p2p);
1692         p2p->ssid_set = 0;
1693         peer->go_neg_req_sent = 0;
1694         peer->wps_method = WPS_NOT_READY;
1695         peer->oob_pw_id = 0;
1696         wpabuf_free(peer->go_neg_conf);
1697         peer->go_neg_conf = NULL;
1698
1699         p2p_set_state(p2p, P2P_PROVISIONING);
1700         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1701 }
1702
1703
1704 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1705                               const u8 *data, size_t len, int rx_freq)
1706 {
1707         p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1708         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1709
1710         if (len < 1)
1711                 return;
1712
1713         switch (data[0]) {
1714         case P2P_GO_NEG_REQ:
1715                 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1716                 break;
1717         case P2P_GO_NEG_RESP:
1718                 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1719                 break;
1720         case P2P_GO_NEG_CONF:
1721                 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1722                 break;
1723         case P2P_INVITATION_REQ:
1724                 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1725                                            rx_freq);
1726                 break;
1727         case P2P_INVITATION_RESP:
1728                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
1729                 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1730                 break;
1731         case P2P_PROV_DISC_REQ:
1732                 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1733                 break;
1734         case P2P_PROV_DISC_RESP:
1735                 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1736                 break;
1737         case P2P_DEV_DISC_REQ:
1738                 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1739                 break;
1740         case P2P_DEV_DISC_RESP:
1741                 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1742                 break;
1743         default:
1744                 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1745                         data[0]);
1746                 break;
1747         }
1748 }
1749
1750
1751 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1752                                  const u8 *sa, const u8 *bssid, const u8 *data,
1753                                  size_t len, int freq)
1754 {
1755         if (len < 1)
1756                 return;
1757
1758         switch (data[0]) {
1759         case WLAN_PA_VENDOR_SPECIFIC:
1760                 data++;
1761                 len--;
1762                 if (len < 4)
1763                         return;
1764                 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1765                         return;
1766
1767                 data += 4;
1768                 len -= 4;
1769
1770                 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1771                 break;
1772         case WLAN_PA_GAS_INITIAL_REQ:
1773                 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1774                 break;
1775         case WLAN_PA_GAS_INITIAL_RESP:
1776                 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1777                 break;
1778         case WLAN_PA_GAS_COMEBACK_REQ:
1779                 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1780                 break;
1781         case WLAN_PA_GAS_COMEBACK_RESP:
1782                 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1783                 break;
1784         }
1785 }
1786
1787
1788 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1789                    const u8 *bssid, u8 category,
1790                    const u8 *data, size_t len, int freq)
1791 {
1792         if (category == WLAN_ACTION_PUBLIC) {
1793                 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1794                 return;
1795         }
1796
1797         if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1798                 return;
1799
1800         if (len < 4)
1801                 return;
1802
1803         if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1804                 return;
1805         data += 4;
1806         len -= 4;
1807
1808         /* P2P action frame */
1809         p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1810         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1811
1812         if (len < 1)
1813                 return;
1814         switch (data[0]) {
1815         case P2P_NOA:
1816                 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1817                 /* TODO */
1818                 break;
1819         case P2P_PRESENCE_REQ:
1820                 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1821                 break;
1822         case P2P_PRESENCE_RESP:
1823                 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1824                 break;
1825         case P2P_GO_DISC_REQ:
1826                 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1827                 break;
1828         default:
1829                 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1830                 break;
1831         }
1832 }
1833
1834
1835 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1836 {
1837         struct p2p_data *p2p = eloop_ctx;
1838         if (p2p->go_neg_peer == NULL)
1839                 return;
1840         if (p2p->pending_listen_freq) {
1841                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start");
1842                 p2p->pending_listen_freq = 0;
1843         }
1844         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1845         p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1846         /*
1847          * Set new timeout to make sure a previously set one does not expire
1848          * too quickly while waiting for the GO Negotiation to complete.
1849          */
1850         p2p_set_timeout(p2p, 0, 500000);
1851         p2p_connect_send(p2p, p2p->go_neg_peer);
1852 }
1853
1854
1855 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1856 {
1857         struct p2p_data *p2p = eloop_ctx;
1858         if (p2p->invite_peer == NULL)
1859                 return;
1860         if (p2p->pending_listen_freq) {
1861                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start");
1862                 p2p->pending_listen_freq = 0;
1863         }
1864         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1865         p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
1866                         p2p->invite_dev_pw_id);
1867 }
1868
1869
1870 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1871                                        const u8 *ie, size_t ie_len)
1872 {
1873         struct p2p_message msg;
1874         struct p2p_device *dev;
1875
1876         os_memset(&msg, 0, sizeof(msg));
1877         if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1878         {
1879                 p2p_parse_free(&msg);
1880                 return; /* not a P2P probe */
1881         }
1882
1883         if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
1884             os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
1885             != 0) {
1886                 /* The Probe Request is not part of P2P Device Discovery. It is
1887                  * not known whether the source address of the frame is the P2P
1888                  * Device Address or P2P Interface Address. Do not add a new
1889                  * peer entry based on this frames.
1890                  */
1891                 p2p_parse_free(&msg);
1892                 return;
1893         }
1894
1895         dev = p2p_get_device(p2p, addr);
1896         if (dev) {
1897                 if (dev->country[0] == 0 && msg.listen_channel)
1898                         os_memcpy(dev->country, msg.listen_channel, 3);
1899                 os_get_reltime(&dev->last_seen);
1900                 p2p_parse_free(&msg);
1901                 return; /* already known */
1902         }
1903
1904         dev = p2p_create_device(p2p, addr);
1905         if (dev == NULL) {
1906                 p2p_parse_free(&msg);
1907                 return;
1908         }
1909
1910         os_get_reltime(&dev->last_seen);
1911         dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
1912
1913         if (msg.listen_channel) {
1914                 os_memcpy(dev->country, msg.listen_channel, 3);
1915                 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
1916                                                        msg.listen_channel[4]);
1917         }
1918
1919         p2p_copy_wps_info(p2p, dev, 1, &msg);
1920
1921         if (msg.wfd_subelems) {
1922                 wpabuf_free(dev->info.wfd_subelems);
1923                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
1924         }
1925
1926         p2p_parse_free(&msg);
1927
1928         p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
1929                 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
1930                 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
1931                 dev->info.group_capab, dev->info.device_name,
1932                 dev->listen_freq);
1933 }
1934
1935
1936 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
1937                                                 const u8 *addr,
1938                                                 struct p2p_message *msg)
1939 {
1940         struct p2p_device *dev;
1941
1942         dev = p2p_get_device(p2p, addr);
1943         if (dev) {
1944                 os_get_reltime(&dev->last_seen);
1945                 return dev; /* already known */
1946         }
1947
1948         dev = p2p_create_device(p2p, addr);
1949         if (dev == NULL)
1950                 return NULL;
1951
1952         p2p_add_dev_info(p2p, addr, dev, msg);
1953
1954         return dev;
1955 }
1956
1957
1958 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
1959 {
1960         if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
1961                 return 1;
1962         if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
1963             WPA_GET_BE32(&req_dev_type[2]) == 0 &&
1964             WPA_GET_BE16(&req_dev_type[6]) == 0)
1965                 return 1; /* Category match with wildcard OUI/sub-category */
1966         return 0;
1967 }
1968
1969
1970 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
1971                         size_t num_req_dev_type)
1972 {
1973         size_t i;
1974         for (i = 0; i < num_req_dev_type; i++) {
1975                 if (dev_type_match(dev_type, req_dev_type[i]))
1976                         return 1;
1977         }
1978         return 0;
1979 }
1980
1981
1982 /**
1983  * p2p_match_dev_type - Match local device type with requested type
1984  * @p2p: P2P module context from p2p_init()
1985  * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
1986  * Returns: 1 on match, 0 on mismatch
1987  *
1988  * This function can be used to match the Requested Device Type attribute in
1989  * WPS IE with the local device types for deciding whether to reply to a Probe
1990  * Request frame.
1991  */
1992 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
1993 {
1994         struct wps_parse_attr attr;
1995         size_t i;
1996
1997         if (wps_parse_msg(wps, &attr))
1998                 return 1; /* assume no Requested Device Type attributes */
1999
2000         if (attr.num_req_dev_type == 0)
2001                 return 1; /* no Requested Device Type attributes -> match */
2002
2003         if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
2004                                 attr.num_req_dev_type))
2005                 return 1; /* Own Primary Device Type matches */
2006
2007         for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) {
2008                 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
2009                                         attr.req_dev_type,
2010                                         attr.num_req_dev_type))
2011                         return 1; /* Own Secondary Device Type matches */
2012         }
2013
2014         /* No matching device type found */
2015         return 0;
2016 }
2017
2018
2019 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
2020 {
2021         struct wpabuf *buf;
2022         u8 *len;
2023         int pw_id = -1;
2024         size_t extra = 0;
2025
2026 #ifdef CONFIG_WIFI_DISPLAY
2027         if (p2p->wfd_ie_probe_resp)
2028                 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
2029 #endif /* CONFIG_WIFI_DISPLAY */
2030
2031         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2032                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2033
2034         buf = wpabuf_alloc(1000 + extra);
2035         if (buf == NULL)
2036                 return NULL;
2037
2038         if (p2p->go_neg_peer) {
2039                 /* Advertise immediate availability of WPS credential */
2040                 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
2041         }
2042
2043         if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
2044                 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
2045                 wpabuf_free(buf);
2046                 return NULL;
2047         }
2048
2049 #ifdef CONFIG_WIFI_DISPLAY
2050         if (p2p->wfd_ie_probe_resp)
2051                 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
2052 #endif /* CONFIG_WIFI_DISPLAY */
2053
2054         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2055                 wpabuf_put_buf(buf,
2056                                p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2057
2058         /* P2P IE */
2059         len = p2p_buf_add_ie_hdr(buf);
2060         p2p_buf_add_capability(buf, p2p->dev_capab &
2061                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2062         if (p2p->ext_listen_interval)
2063                 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
2064                                               p2p->ext_listen_interval);
2065         p2p_buf_add_device_info(buf, p2p, NULL);
2066         p2p_buf_update_ie_hdr(buf, len);
2067
2068         return buf;
2069 }
2070
2071
2072 static enum p2p_probe_req_status
2073 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2074                 const u8 *bssid, const u8 *ie, size_t ie_len)
2075 {
2076         struct ieee802_11_elems elems;
2077         struct wpabuf *buf;
2078         struct ieee80211_mgmt *resp;
2079         struct p2p_message msg;
2080         struct wpabuf *ies;
2081
2082         if (!p2p->in_listen || !p2p->drv_in_listen) {
2083                 /* not in Listen state - ignore Probe Request */
2084                 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
2085                         p2p->in_listen, p2p->drv_in_listen);
2086                 return P2P_PREQ_NOT_LISTEN;
2087         }
2088
2089         if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
2090             ParseFailed) {
2091                 /* Ignore invalid Probe Request frames */
2092                 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
2093                 return P2P_PREQ_MALFORMED;
2094         }
2095
2096         if (elems.p2p == NULL) {
2097                 /* not a P2P probe - ignore it */
2098                 p2p_dbg(p2p, "Not a P2P probe - ignore it");
2099                 return P2P_PREQ_NOT_P2P;
2100         }
2101
2102         if (dst && !is_broadcast_ether_addr(dst) &&
2103             os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2104                 /* Not sent to the broadcast address or our P2P Device Address
2105                  */
2106                 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2107                         MAC2STR(dst));
2108                 return P2P_PREQ_NOT_PROCESSED;
2109         }
2110
2111         if (bssid && !is_broadcast_ether_addr(bssid)) {
2112                 /* Not sent to the Wildcard BSSID */
2113                 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2114                         MAC2STR(bssid));
2115                 return P2P_PREQ_NOT_PROCESSED;
2116         }
2117
2118         if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2119             os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2120             0) {
2121                 /* not using P2P Wildcard SSID - ignore */
2122                 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2123                 return P2P_PREQ_NOT_PROCESSED;
2124         }
2125
2126         if (supp_rates_11b_only(&elems)) {
2127                 /* Indicates support for 11b rates only */
2128                 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2129                 return P2P_PREQ_NOT_P2P;
2130         }
2131
2132         os_memset(&msg, 0, sizeof(msg));
2133         if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2134                 /* Could not parse P2P attributes */
2135                 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2136                 return P2P_PREQ_NOT_P2P;
2137         }
2138
2139         if (msg.device_id &&
2140             os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2141                 /* Device ID did not match */
2142                 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2143                         MAC2STR(msg.device_id));
2144                 p2p_parse_free(&msg);
2145                 return P2P_PREQ_NOT_PROCESSED;
2146         }
2147
2148         /* Check Requested Device Type match */
2149         if (msg.wps_attributes &&
2150             !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2151                 /* No match with Requested Device Type */
2152                 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2153                 p2p_parse_free(&msg);
2154                 return P2P_PREQ_NOT_PROCESSED;
2155         }
2156         p2p_parse_free(&msg);
2157
2158         if (!p2p->cfg->send_probe_resp) {
2159                 /* Response generated elsewhere */
2160                 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2161                 return P2P_PREQ_NOT_PROCESSED;
2162         }
2163
2164         p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2165
2166         /*
2167          * We do not really have a specific BSS that this frame is advertising,
2168          * so build a frame that has some information in valid format. This is
2169          * really only used for discovery purposes, not to learn exact BSS
2170          * parameters.
2171          */
2172         ies = p2p_build_probe_resp_ies(p2p);
2173         if (ies == NULL)
2174                 return P2P_PREQ_NOT_PROCESSED;
2175
2176         buf = wpabuf_alloc(200 + wpabuf_len(ies));
2177         if (buf == NULL) {
2178                 wpabuf_free(ies);
2179                 return P2P_PREQ_NOT_PROCESSED;
2180         }
2181
2182         resp = NULL;
2183         resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
2184
2185         resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2186                                            (WLAN_FC_STYPE_PROBE_RESP << 4));
2187         os_memcpy(resp->da, addr, ETH_ALEN);
2188         os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2189         os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2190         resp->u.probe_resp.beacon_int = host_to_le16(100);
2191         /* hardware or low-level driver will setup seq_ctrl and timestamp */
2192         resp->u.probe_resp.capab_info =
2193                 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2194                              WLAN_CAPABILITY_PRIVACY |
2195                              WLAN_CAPABILITY_SHORT_SLOT_TIME);
2196
2197         wpabuf_put_u8(buf, WLAN_EID_SSID);
2198         wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2199         wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2200
2201         wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2202         wpabuf_put_u8(buf, 8);
2203         wpabuf_put_u8(buf, (60 / 5) | 0x80);
2204         wpabuf_put_u8(buf, 90 / 5);
2205         wpabuf_put_u8(buf, (120 / 5) | 0x80);
2206         wpabuf_put_u8(buf, 180 / 5);
2207         wpabuf_put_u8(buf, (240 / 5) | 0x80);
2208         wpabuf_put_u8(buf, 360 / 5);
2209         wpabuf_put_u8(buf, 480 / 5);
2210         wpabuf_put_u8(buf, 540 / 5);
2211
2212         wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2213         wpabuf_put_u8(buf, 1);
2214         wpabuf_put_u8(buf, p2p->cfg->channel);
2215
2216         wpabuf_put_buf(buf, ies);
2217         wpabuf_free(ies);
2218
2219         p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
2220
2221         wpabuf_free(buf);
2222
2223         return P2P_PREQ_NOT_PROCESSED;
2224 }
2225
2226
2227 enum p2p_probe_req_status
2228 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2229                  const u8 *bssid, const u8 *ie, size_t ie_len)
2230 {
2231         enum p2p_probe_req_status res;
2232
2233         p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2234
2235         res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
2236
2237         if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2238             p2p->go_neg_peer &&
2239             os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2240             == 0 &&
2241             !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2242                 /* Received a Probe Request from GO Negotiation peer */
2243                 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2244                 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2245                 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2246                 return P2P_PREQ_PROCESSED;
2247         }
2248
2249         if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2250             p2p->invite_peer &&
2251             (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2252             os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2253             == 0) {
2254                 /* Received a Probe Request from Invite peer */
2255                 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2256                 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2257                 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2258                 return P2P_PREQ_PROCESSED;
2259         }
2260
2261         return res;
2262 }
2263
2264
2265 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2266                                     u8 *buf, size_t len, struct wpabuf *p2p_ie)
2267 {
2268         struct wpabuf *tmp;
2269         u8 *lpos;
2270         size_t tmplen;
2271         int res;
2272         u8 group_capab;
2273
2274         if (p2p_ie == NULL)
2275                 return 0; /* WLAN AP is not a P2P manager */
2276
2277         /*
2278          * (Re)Association Request - P2P IE
2279          * P2P Capability attribute (shall be present)
2280          * P2P Interface attribute (present if concurrent device and
2281          *      P2P Management is enabled)
2282          */
2283         tmp = wpabuf_alloc(200);
2284         if (tmp == NULL)
2285                 return -1;
2286
2287         lpos = p2p_buf_add_ie_hdr(tmp);
2288         group_capab = 0;
2289         if (p2p->num_groups > 0) {
2290                 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2291                 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2292                     (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2293                     p2p->cross_connect)
2294                         group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2295         }
2296         p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2297         if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2298             (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2299                 p2p_buf_add_p2p_interface(tmp, p2p);
2300         p2p_buf_update_ie_hdr(tmp, lpos);
2301
2302         tmplen = wpabuf_len(tmp);
2303         if (tmplen > len)
2304                 res = -1;
2305         else {
2306                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2307                 res = tmplen;
2308         }
2309         wpabuf_free(tmp);
2310
2311         return res;
2312 }
2313
2314
2315 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2316                      size_t len, int p2p_group, struct wpabuf *p2p_ie)
2317 {
2318         struct wpabuf *tmp;
2319         u8 *lpos;
2320         struct p2p_device *peer;
2321         size_t tmplen;
2322         int res;
2323         size_t extra = 0;
2324
2325         if (!p2p_group)
2326                 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2327
2328 #ifdef CONFIG_WIFI_DISPLAY
2329         if (p2p->wfd_ie_assoc_req)
2330                 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2331 #endif /* CONFIG_WIFI_DISPLAY */
2332
2333         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2334                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2335
2336         /*
2337          * (Re)Association Request - P2P IE
2338          * P2P Capability attribute (shall be present)
2339          * Extended Listen Timing (may be present)
2340          * P2P Device Info attribute (shall be present)
2341          */
2342         tmp = wpabuf_alloc(200 + extra);
2343         if (tmp == NULL)
2344                 return -1;
2345
2346 #ifdef CONFIG_WIFI_DISPLAY
2347         if (p2p->wfd_ie_assoc_req)
2348                 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2349 #endif /* CONFIG_WIFI_DISPLAY */
2350
2351         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2352                 wpabuf_put_buf(tmp,
2353                                p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2354
2355         peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2356
2357         lpos = p2p_buf_add_ie_hdr(tmp);
2358         p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2359         if (p2p->ext_listen_interval)
2360                 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2361                                               p2p->ext_listen_interval);
2362         p2p_buf_add_device_info(tmp, p2p, peer);
2363         p2p_buf_update_ie_hdr(tmp, lpos);
2364
2365         tmplen = wpabuf_len(tmp);
2366         if (tmplen > len)
2367                 res = -1;
2368         else {
2369                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2370                 res = tmplen;
2371         }
2372         wpabuf_free(tmp);
2373
2374         return res;
2375 }
2376
2377
2378 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2379 {
2380         struct wpabuf *p2p_ie;
2381         int ret;
2382
2383         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2384         if (p2p_ie == NULL)
2385                 return 0;
2386
2387         ret = p2p_attr_text(p2p_ie, buf, end);
2388         wpabuf_free(p2p_ie);
2389         return ret;
2390 }
2391
2392
2393 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2394 {
2395         struct p2p_message msg;
2396
2397         os_memset(&msg, 0, sizeof(msg));
2398         if (p2p_parse_p2p_ie(p2p_ie, &msg))
2399                 return -1;
2400
2401         if (msg.p2p_device_addr) {
2402                 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2403                 return 0;
2404         } else if (msg.device_id) {
2405                 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2406                 return 0;
2407         }
2408         return -1;
2409 }
2410
2411
2412 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2413 {
2414         struct wpabuf *p2p_ie;
2415         int ret;
2416
2417         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2418                                              P2P_IE_VENDOR_TYPE);
2419         if (p2p_ie == NULL)
2420                 return -1;
2421         ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2422         wpabuf_free(p2p_ie);
2423         return ret;
2424 }
2425
2426
2427 static void p2p_clear_go_neg(struct p2p_data *p2p)
2428 {
2429         p2p->go_neg_peer = NULL;
2430         p2p_clear_timeout(p2p);
2431         p2p_set_state(p2p, P2P_IDLE);
2432 }
2433
2434
2435 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2436 {
2437         if (p2p->go_neg_peer == NULL) {
2438                 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2439                 return; /* No pending Group Formation */
2440         }
2441
2442         if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2443             0) {
2444                 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2445                         MACSTR " (GO Negotiation peer " MACSTR ")",
2446                         MAC2STR(mac_addr),
2447                         MAC2STR(p2p->go_neg_peer->intended_addr));
2448                 return; /* Ignore unexpected peer address */
2449         }
2450
2451         p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2452                 MAC2STR(mac_addr));
2453
2454         p2p_clear_go_neg(p2p);
2455 }
2456
2457
2458 void p2p_group_formation_failed(struct p2p_data *p2p)
2459 {
2460         if (p2p->go_neg_peer == NULL) {
2461                 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2462                 return; /* No pending Group Formation */
2463         }
2464
2465         p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2466                 MAC2STR(p2p->go_neg_peer->intended_addr));
2467
2468         p2p_clear_go_neg(p2p);
2469 }
2470
2471
2472 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2473 {
2474         struct p2p_data *p2p;
2475
2476         if (cfg->max_peers < 1 ||
2477             cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
2478                 return NULL;
2479
2480         p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2481         if (p2p == NULL)
2482                 return NULL;
2483         p2p->cfg = (struct p2p_config *) (p2p + 1);
2484         os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2485         if (cfg->dev_name)
2486                 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2487         if (cfg->manufacturer)
2488                 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2489         if (cfg->model_name)
2490                 p2p->cfg->model_name = os_strdup(cfg->model_name);
2491         if (cfg->model_number)
2492                 p2p->cfg->model_number = os_strdup(cfg->model_number);
2493         if (cfg->serial_number)
2494                 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2495         if (cfg->pref_chan) {
2496                 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2497                                                 sizeof(struct p2p_channel));
2498                 if (p2p->cfg->pref_chan) {
2499                         os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2500                                   cfg->num_pref_chan *
2501                                   sizeof(struct p2p_channel));
2502                 } else
2503                         p2p->cfg->num_pref_chan = 0;
2504         }
2505
2506         p2p->min_disc_int = 1;
2507         p2p->max_disc_int = 3;
2508         p2p->max_disc_tu = -1;
2509
2510         if (os_get_random(&p2p->next_tie_breaker, 1) < 0)
2511                 p2p->next_tie_breaker = 0;
2512         p2p->next_tie_breaker &= 0x01;
2513         if (cfg->sd_request)
2514                 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2515         p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2516         if (cfg->concurrent_operations)
2517                 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2518         p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2519
2520         dl_list_init(&p2p->devices);
2521
2522         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2523                                p2p_expiration_timeout, p2p, NULL);
2524
2525         p2p->go_timeout = 100;
2526         p2p->client_timeout = 20;
2527         p2p->num_p2p_sd_queries = 0;
2528
2529         p2p_dbg(p2p, "initialized");
2530         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2531         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2532
2533         return p2p;
2534 }
2535
2536
2537 void p2p_deinit(struct p2p_data *p2p)
2538 {
2539 #ifdef CONFIG_WIFI_DISPLAY
2540         wpabuf_free(p2p->wfd_ie_beacon);
2541         wpabuf_free(p2p->wfd_ie_probe_req);
2542         wpabuf_free(p2p->wfd_ie_probe_resp);
2543         wpabuf_free(p2p->wfd_ie_assoc_req);
2544         wpabuf_free(p2p->wfd_ie_invitation);
2545         wpabuf_free(p2p->wfd_ie_prov_disc_req);
2546         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2547         wpabuf_free(p2p->wfd_ie_go_neg);
2548         wpabuf_free(p2p->wfd_dev_info);
2549         wpabuf_free(p2p->wfd_assoc_bssid);
2550         wpabuf_free(p2p->wfd_coupled_sink_info);
2551 #endif /* CONFIG_WIFI_DISPLAY */
2552
2553         eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2554         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2555         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2556         eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2557         eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2558         p2p_flush(p2p);
2559         p2p_free_req_dev_types(p2p);
2560         os_free(p2p->cfg->dev_name);
2561         os_free(p2p->cfg->manufacturer);
2562         os_free(p2p->cfg->model_name);
2563         os_free(p2p->cfg->model_number);
2564         os_free(p2p->cfg->serial_number);
2565         os_free(p2p->cfg->pref_chan);
2566         os_free(p2p->groups);
2567         wpabuf_free(p2p->sd_resp);
2568         os_free(p2p->after_scan_tx);
2569         p2p_remove_wps_vendor_extensions(p2p);
2570         os_free(p2p->no_go_freq.range);
2571         os_free(p2p);
2572 }
2573
2574
2575 void p2p_flush(struct p2p_data *p2p)
2576 {
2577         struct p2p_device *dev, *prev;
2578         p2p_stop_find(p2p);
2579         dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2580                               list) {
2581                 dl_list_del(&dev->list);
2582                 p2p_device_free(p2p, dev);
2583         }
2584         p2p_free_sd_queries(p2p);
2585         os_free(p2p->after_scan_tx);
2586         p2p->after_scan_tx = NULL;
2587 }
2588
2589
2590 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2591 {
2592         struct p2p_device *dev;
2593
2594         dev = p2p_get_device(p2p, addr);
2595         if (dev == NULL)
2596                 return -1;
2597
2598         p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
2599
2600         if (p2p->go_neg_peer == dev) {
2601                 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2602                 p2p->go_neg_peer = NULL;
2603         }
2604
2605         dev->wps_method = WPS_NOT_READY;
2606         dev->oob_pw_id = 0;
2607         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
2608         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
2609
2610         /* Check if after_scan_tx is for this peer. If so free it */
2611         if (p2p->after_scan_tx &&
2612             os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
2613                 os_free(p2p->after_scan_tx);
2614                 p2p->after_scan_tx = NULL;
2615         }
2616
2617         return 0;
2618 }
2619
2620
2621 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
2622 {
2623         os_free(p2p->cfg->dev_name);
2624         if (dev_name) {
2625                 p2p->cfg->dev_name = os_strdup(dev_name);
2626                 if (p2p->cfg->dev_name == NULL)
2627                         return -1;
2628         } else
2629                 p2p->cfg->dev_name = NULL;
2630         return 0;
2631 }
2632
2633
2634 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
2635 {
2636         os_free(p2p->cfg->manufacturer);
2637         p2p->cfg->manufacturer = NULL;
2638         if (manufacturer) {
2639                 p2p->cfg->manufacturer = os_strdup(manufacturer);
2640                 if (p2p->cfg->manufacturer == NULL)
2641                         return -1;
2642         }
2643
2644         return 0;
2645 }
2646
2647
2648 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
2649 {
2650         os_free(p2p->cfg->model_name);
2651         p2p->cfg->model_name = NULL;
2652         if (model_name) {
2653                 p2p->cfg->model_name = os_strdup(model_name);
2654                 if (p2p->cfg->model_name == NULL)
2655                         return -1;
2656         }
2657
2658         return 0;
2659 }
2660
2661
2662 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
2663 {
2664         os_free(p2p->cfg->model_number);
2665         p2p->cfg->model_number = NULL;
2666         if (model_number) {
2667                 p2p->cfg->model_number = os_strdup(model_number);
2668                 if (p2p->cfg->model_number == NULL)
2669                         return -1;
2670         }
2671
2672         return 0;
2673 }
2674
2675
2676 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
2677 {
2678         os_free(p2p->cfg->serial_number);
2679         p2p->cfg->serial_number = NULL;
2680         if (serial_number) {
2681                 p2p->cfg->serial_number = os_strdup(serial_number);
2682                 if (p2p->cfg->serial_number == NULL)
2683                         return -1;
2684         }
2685
2686         return 0;
2687 }
2688
2689
2690 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
2691 {
2692         p2p->cfg->config_methods = config_methods;
2693 }
2694
2695
2696 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
2697 {
2698         os_memcpy(p2p->cfg->uuid, uuid, 16);
2699 }
2700
2701
2702 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
2703 {
2704         os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
2705         return 0;
2706 }
2707
2708
2709 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
2710                           size_t num_dev_types)
2711 {
2712         if (num_dev_types > P2P_SEC_DEVICE_TYPES)
2713                 num_dev_types = P2P_SEC_DEVICE_TYPES;
2714         p2p->cfg->num_sec_dev_types = num_dev_types;
2715         os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
2716         return 0;
2717 }
2718
2719
2720 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
2721 {
2722         int i;
2723
2724         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2725                 wpabuf_free(p2p->wps_vendor_ext[i]);
2726                 p2p->wps_vendor_ext[i] = NULL;
2727         }
2728 }
2729
2730
2731 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
2732                                  const struct wpabuf *vendor_ext)
2733 {
2734         int i;
2735
2736         if (vendor_ext == NULL)
2737                 return -1;
2738
2739         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2740                 if (p2p->wps_vendor_ext[i] == NULL)
2741                         break;
2742         }
2743         if (i >= P2P_MAX_WPS_VENDOR_EXT)
2744                 return -1;
2745
2746         p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
2747         if (p2p->wps_vendor_ext[i] == NULL)
2748                 return -1;
2749
2750         return 0;
2751 }
2752
2753
2754 int p2p_set_country(struct p2p_data *p2p, const char *country)
2755 {
2756         os_memcpy(p2p->cfg->country, country, 3);
2757         return 0;
2758 }
2759
2760
2761 static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev)
2762 {
2763         if (dev->sd_pending_bcast_queries == 0) {
2764                 /* Initialize with total number of registered broadcast
2765                  * SD queries. */
2766                 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
2767         }
2768
2769         if (p2p_start_sd(p2p, dev) == 0)
2770                 return 1;
2771
2772         if (dev->req_config_methods &&
2773             !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
2774                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2775                         MACSTR " (config methods 0x%x)",
2776                         MAC2STR(dev->info.p2p_device_addr),
2777                         dev->req_config_methods);
2778                 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
2779                         return 1;
2780         }
2781
2782         return 0;
2783 }
2784
2785
2786 void p2p_continue_find(struct p2p_data *p2p)
2787 {
2788         struct p2p_device *dev;
2789         int found;
2790
2791         p2p_set_state(p2p, P2P_SEARCH);
2792
2793         /* Continue from the device following the last iteration */
2794         found = 0;
2795         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2796                 if (dev == p2p->last_p2p_find_oper) {
2797                         found = 1;
2798                         continue;
2799                 }
2800                 if (!found)
2801                         continue;
2802                 if (p2p_pre_find_operation(p2p, dev) > 0) {
2803                         p2p->last_p2p_find_oper = dev;
2804                         return;
2805                 }
2806         }
2807
2808         /*
2809          * Wrap around to the beginning of the list and continue until the last
2810          * iteration device.
2811          */
2812         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2813                 if (p2p_pre_find_operation(p2p, dev) > 0) {
2814                         p2p->last_p2p_find_oper = dev;
2815                         return;
2816                 }
2817                 if (dev == p2p->last_p2p_find_oper)
2818                         break;
2819         }
2820
2821         p2p_listen_in_find(p2p, 1);
2822 }
2823
2824
2825 static void p2p_sd_cb(struct p2p_data *p2p, int success)
2826 {
2827         p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
2828                 success);
2829         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2830
2831         if (!success) {
2832                 if (p2p->sd_peer)
2833                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2834                 p2p->sd_peer = NULL;
2835                 p2p_continue_find(p2p);
2836                 return;
2837         }
2838
2839         if (p2p->sd_peer == NULL) {
2840                 p2p_dbg(p2p, "No SD peer entry known");
2841                 p2p_continue_find(p2p);
2842                 return;
2843         }
2844
2845         if (p2p->sd_query->for_all_peers) {
2846                 /* Update the pending broadcast SD query count for this device
2847                  */
2848                 p2p->sd_peer->sd_pending_bcast_queries--;
2849
2850                 /*
2851                  * If there are no pending broadcast queries for this device,
2852                  * mark it as done (-1).
2853                  */
2854                 if (p2p->sd_peer->sd_pending_bcast_queries == 0)
2855                         p2p->sd_peer->sd_pending_bcast_queries = -1;
2856         }
2857
2858         /* Wait for response from the peer */
2859         p2p_set_state(p2p, P2P_SD_DURING_FIND);
2860         p2p_set_timeout(p2p, 0, 200000);
2861 }
2862
2863
2864 /**
2865  * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
2866  * @p2p: P2P module context from p2p_init()
2867  */
2868 static void p2p_retry_pd(struct p2p_data *p2p)
2869 {
2870         struct p2p_device *dev;
2871
2872         if (p2p->state != P2P_IDLE)
2873                 return;
2874
2875         /*
2876          * Retry the prov disc req attempt only for the peer that the user had
2877          * requested.
2878          */
2879
2880         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2881                 if (os_memcmp(p2p->pending_pd_devaddr,
2882                               dev->info.p2p_device_addr, ETH_ALEN) != 0)
2883                         continue;
2884                 if (!dev->req_config_methods)
2885                         continue;
2886
2887                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2888                         MACSTR " (config methods 0x%x)",
2889                         MAC2STR(dev->info.p2p_device_addr),
2890                         dev->req_config_methods);
2891                 p2p_send_prov_disc_req(p2p, dev,
2892                                        dev->flags & P2P_DEV_PD_FOR_JOIN,
2893                                        p2p->pd_force_freq);
2894                 return;
2895         }
2896 }
2897
2898
2899 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
2900 {
2901         p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
2902                 success);
2903
2904         /*
2905          * Postpone resetting the pending action state till after we actually
2906          * time out. This allows us to take some action like notifying any
2907          * interested parties about no response to the request.
2908          *
2909          * When the timer (below) goes off we check in IDLE, SEARCH, or
2910          * LISTEN_ONLY state, which are the only allowed states to issue a PD
2911          * requests in, if this was still pending and then raise notification.
2912          */
2913
2914         if (!success) {
2915                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2916
2917                 if (p2p->user_initiated_pd &&
2918                     (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
2919                 {
2920                         /* Retry request from timeout to avoid busy loops */
2921                         p2p->pending_action_state = P2P_PENDING_PD;
2922                         p2p_set_timeout(p2p, 0, 50000);
2923                 } else if (p2p->state != P2P_IDLE)
2924                         p2p_continue_find(p2p);
2925                 else if (p2p->user_initiated_pd) {
2926                         p2p->pending_action_state = P2P_PENDING_PD;
2927                         p2p_set_timeout(p2p, 0, 300000);
2928                 }
2929                 return;
2930         }
2931
2932         /*
2933          * This postponing, of resetting pending_action_state, needs to be
2934          * done only for user initiated PD requests and not internal ones.
2935          */
2936         if (p2p->user_initiated_pd)
2937                 p2p->pending_action_state = P2P_PENDING_PD;
2938         else
2939                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2940
2941         /* Wait for response from the peer */
2942         if (p2p->state == P2P_SEARCH)
2943                 p2p_set_state(p2p, P2P_PD_DURING_FIND);
2944         p2p_set_timeout(p2p, 0, 200000);
2945 }
2946
2947
2948 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
2949                          struct os_reltime *rx_time, int level, const u8 *ies,
2950                          size_t ies_len)
2951 {
2952         if (os_reltime_before(rx_time, &p2p->find_start)) {
2953                 /*
2954                  * The driver may have cached (e.g., in cfg80211 BSS table) the
2955                  * scan results for relatively long time. To avoid reporting
2956                  * stale information, update P2P peers only based on results
2957                  * that have based on frames received after the last p2p_find
2958                  * operation was started.
2959                  */
2960                 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
2961                         " (rx_time=%u.%06u)",
2962                         MAC2STR(bssid), (unsigned int) rx_time->sec,
2963                         (unsigned int) rx_time->usec);
2964                 return 0;
2965         }
2966
2967         p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
2968
2969         return 0;
2970 }
2971
2972
2973 void p2p_scan_res_handled(struct p2p_data *p2p)
2974 {
2975         if (!p2p->p2p_scan_running) {
2976                 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
2977         }
2978         p2p->p2p_scan_running = 0;
2979         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2980
2981         if (p2p_run_after_scan(p2p))
2982                 return;
2983         if (p2p->state == P2P_SEARCH)
2984                 p2p_continue_find(p2p);
2985 }
2986
2987
2988 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
2989 {
2990         u8 *len;
2991
2992 #ifdef CONFIG_WIFI_DISPLAY
2993         if (p2p->wfd_ie_probe_req)
2994                 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
2995 #endif /* CONFIG_WIFI_DISPLAY */
2996
2997         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
2998                 wpabuf_put_buf(ies,
2999                                p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3000
3001         len = p2p_buf_add_ie_hdr(ies);
3002         p2p_buf_add_capability(ies, p2p->dev_capab &
3003                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
3004         if (dev_id)
3005                 p2p_buf_add_device_id(ies, dev_id);
3006         if (p2p->cfg->reg_class && p2p->cfg->channel)
3007                 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
3008                                            p2p->cfg->reg_class,
3009                                            p2p->cfg->channel);
3010         if (p2p->ext_listen_interval)
3011                 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
3012                                               p2p->ext_listen_interval);
3013         /* TODO: p2p_buf_add_operating_channel() if GO */
3014         p2p_buf_update_ie_hdr(ies, len);
3015 }
3016
3017
3018 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
3019 {
3020         size_t len = 100;
3021
3022 #ifdef CONFIG_WIFI_DISPLAY
3023         if (p2p && p2p->wfd_ie_probe_req)
3024                 len += wpabuf_len(p2p->wfd_ie_probe_req);
3025 #endif /* CONFIG_WIFI_DISPLAY */
3026
3027         if (p2p && p2p->vendor_elem &&
3028             p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3029                 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3030
3031         return len;
3032 }
3033
3034
3035 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
3036 {
3037         return p2p_attr_text(p2p_ie, buf, end);
3038 }
3039
3040
3041 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
3042 {
3043         struct p2p_device *dev = p2p->go_neg_peer;
3044         int timeout;
3045
3046         p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
3047
3048         if (dev == NULL) {
3049                 p2p_dbg(p2p, "No pending GO Negotiation");
3050                 return;
3051         }
3052
3053         if (success) {
3054                 if (dev->flags & P2P_DEV_USER_REJECTED) {
3055                         p2p_set_state(p2p, P2P_IDLE);
3056                         return;
3057                 }
3058         } else if (dev->go_neg_req_sent) {
3059                 /* Cancel the increment from p2p_connect_send() on failure */
3060                 dev->go_neg_req_sent--;
3061         }
3062
3063         if (!success &&
3064             (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
3065             !is_zero_ether_addr(dev->member_in_go_dev)) {
3066                 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
3067                         MAC2STR(dev->info.p2p_device_addr));
3068                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3069                 p2p_send_dev_disc_req(p2p, dev);
3070                 return;
3071         }
3072
3073         /*
3074          * Use P2P find, if needed, to find the other device from its listen
3075          * channel.
3076          */
3077         p2p_set_state(p2p, P2P_CONNECT);
3078         timeout = success ? 500000 : 100000;
3079         if (!success && p2p->go_neg_peer &&
3080             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
3081                 unsigned int r;
3082                 /*
3083                  * Peer is expected to wait our response and we will skip the
3084                  * listen phase. Add some randomness to the wait time here to
3085                  * make it less likely to hit cases where we could end up in
3086                  * sync with peer not listening.
3087                  */
3088                 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
3089                         r = 0;
3090                 timeout += r % 100000;
3091         }
3092         p2p_set_timeout(p2p, 0, timeout);
3093 }
3094
3095
3096 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
3097 {
3098         p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
3099                 success);
3100         if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
3101                 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
3102                 return;
3103         }
3104         p2p_set_state(p2p, P2P_CONNECT);
3105         p2p_set_timeout(p2p, 0, 500000);
3106 }
3107
3108
3109 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
3110                                        const u8 *addr)
3111 {
3112         p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
3113         if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
3114                 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status);
3115         } else if (success) {
3116                 struct p2p_device *dev;
3117                 dev = p2p_get_device(p2p, addr);
3118                 if (dev &&
3119                     dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
3120                         dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
3121         }
3122 }
3123
3124
3125 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
3126                                enum p2p_send_action_result result)
3127 {
3128         struct p2p_device *dev;
3129
3130         p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
3131         if (result == P2P_SEND_ACTION_FAILED) {
3132                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3133                 p2p_go_neg_failed(p2p, -1);
3134                 return;
3135         }
3136
3137         dev = p2p->go_neg_peer;
3138
3139         if (result == P2P_SEND_ACTION_NO_ACK) {
3140                 /*
3141                  * Retry GO Negotiation Confirmation
3142                  * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
3143                  * ACK for confirmation.
3144                  */
3145                 if (dev && dev->go_neg_conf &&
3146                     dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
3147                         p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
3148                                 dev->go_neg_conf_sent);
3149                         p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
3150                         if (p2p_send_action(p2p, dev->go_neg_conf_freq,
3151                                             dev->info.p2p_device_addr,
3152                                             p2p->cfg->dev_addr,
3153                                             dev->info.p2p_device_addr,
3154                                             wpabuf_head(dev->go_neg_conf),
3155                                             wpabuf_len(dev->go_neg_conf), 0) >=
3156                             0) {
3157                                 dev->go_neg_conf_sent++;
3158                                 return;
3159                         }
3160                         p2p_dbg(p2p, "Failed to re-send Action frame");
3161
3162                         /*
3163                          * Continue with the assumption that the first attempt
3164                          * went through and just the ACK frame was lost.
3165                          */
3166                 }
3167
3168                 /*
3169                  * It looks like the TX status for GO Negotiation Confirm is
3170                  * often showing failure even when the peer has actually
3171                  * received the frame. Since the peer may change channels
3172                  * immediately after having received the frame, we may not see
3173                  * an Ack for retries, so just dropping a single frame may
3174                  * trigger this. To allow the group formation to succeed if the
3175                  * peer did indeed receive the frame, continue regardless of
3176                  * the TX status.
3177                  */
3178                 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
3179         }
3180
3181         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3182
3183         if (dev == NULL)
3184                 return;
3185
3186         p2p_go_complete(p2p, dev);
3187 }
3188
3189
3190 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3191                         const u8 *src, const u8 *bssid,
3192                         enum p2p_send_action_result result)
3193 {
3194         enum p2p_pending_action_state state;
3195         int success;
3196
3197         p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
3198                 " src=" MACSTR " bssid=" MACSTR " result=%d",
3199                 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
3200                 MAC2STR(bssid), result);
3201         success = result == P2P_SEND_ACTION_SUCCESS;
3202         state = p2p->pending_action_state;
3203         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3204         switch (state) {
3205         case P2P_NO_PENDING_ACTION:
3206                 if (p2p->send_action_in_progress) {
3207                         p2p->send_action_in_progress = 0;
3208                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3209                 }
3210                 if (p2p->after_scan_tx_in_progress) {
3211                         p2p->after_scan_tx_in_progress = 0;
3212                         if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
3213                             p2p_run_after_scan(p2p))
3214                                 break;
3215                         if (p2p->state == P2P_SEARCH) {
3216                                 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
3217                                 p2p_continue_find(p2p);
3218                         }
3219                 }
3220                 break;
3221         case P2P_PENDING_GO_NEG_REQUEST:
3222                 p2p_go_neg_req_cb(p2p, success);
3223                 break;
3224         case P2P_PENDING_GO_NEG_RESPONSE:
3225                 p2p_go_neg_resp_cb(p2p, success);
3226                 break;
3227         case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3228                 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3229                 break;
3230         case P2P_PENDING_GO_NEG_CONFIRM:
3231                 p2p_go_neg_conf_cb(p2p, result);
3232                 break;
3233         case P2P_PENDING_SD:
3234                 p2p_sd_cb(p2p, success);
3235                 break;
3236         case P2P_PENDING_PD:
3237                 p2p_prov_disc_cb(p2p, success);
3238                 break;
3239         case P2P_PENDING_INVITATION_REQUEST:
3240                 p2p_invitation_req_cb(p2p, success);
3241                 break;
3242         case P2P_PENDING_INVITATION_RESPONSE:
3243                 p2p_invitation_resp_cb(p2p, success);
3244                 break;
3245         case P2P_PENDING_DEV_DISC_REQUEST:
3246                 p2p_dev_disc_req_cb(p2p, success);
3247                 break;
3248         case P2P_PENDING_DEV_DISC_RESPONSE:
3249                 p2p_dev_disc_resp_cb(p2p, success);
3250                 break;
3251         case P2P_PENDING_GO_DISC_REQ:
3252                 p2p_go_disc_req_cb(p2p, success);
3253                 break;
3254         }
3255
3256         p2p->after_scan_tx_in_progress = 0;
3257 }
3258
3259
3260 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3261                    unsigned int duration)
3262 {
3263         if (freq == p2p->pending_client_disc_freq) {
3264                 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3265                 p2p->pending_client_disc_freq = 0;
3266                 return;
3267         }
3268
3269         if (freq != p2p->pending_listen_freq) {
3270                 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3271                         freq, duration, p2p->pending_listen_freq);
3272                 return;
3273         }
3274
3275         p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3276                 p2p->pending_listen_sec, p2p->pending_listen_usec,
3277                 p2p->pending_listen_freq);
3278         p2p->in_listen = 1;
3279         p2p->drv_in_listen = freq;
3280         if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3281                 /*
3282                  * Add 20 msec extra wait to avoid race condition with driver
3283                  * remain-on-channel end event, i.e., give driver more time to
3284                  * complete the operation before our timeout expires.
3285                  */
3286                 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3287                                 p2p->pending_listen_usec + 20000);
3288         }
3289
3290         p2p->pending_listen_freq = 0;
3291 }
3292
3293
3294 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3295 {
3296         p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3297         p2p->drv_in_listen = 0;
3298         if (p2p->in_listen)
3299                 return 0; /* Internal timeout will trigger the next step */
3300
3301         if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3302                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3303                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3304                         p2p_go_neg_failed(p2p, -1);
3305                         return 0;
3306                 }
3307
3308                 p2p_set_state(p2p, P2P_CONNECT);
3309                 p2p_connect_send(p2p, p2p->go_neg_peer);
3310                 return 1;
3311         } else if (p2p->state == P2P_SEARCH) {
3312                 if (p2p->p2p_scan_running) {
3313                          /*
3314                           * Search is already in progress. This can happen if
3315                           * an Action frame RX is reported immediately after
3316                           * the end of a remain-on-channel operation and the
3317                           * response frame to that is sent using an offchannel
3318                           * operation while in p2p_find. Avoid an attempt to
3319                           * restart a scan here.
3320                           */
3321                         p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3322                         return 1;
3323                 }
3324                 if (p2p->pending_listen_freq) {
3325                         /*
3326                          * Better wait a bit if the driver is unable to start
3327                          * offchannel operation for some reason. p2p_search()
3328                          * will be started from internal timeout.
3329                          */
3330                         p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3331                         p2p_set_timeout(p2p, 0, 100000);
3332                         return 1;
3333                 }
3334                 if (p2p->search_delay) {
3335                         p2p_dbg(p2p, "Delay search operation by %u ms",
3336                                 p2p->search_delay);
3337                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3338                                         (p2p->search_delay % 1000) * 1000);
3339                         return 1;
3340                 }
3341                 p2p_search(p2p);
3342                 return 1;
3343         }
3344
3345         return 0;
3346 }
3347
3348
3349 static void p2p_timeout_connect(struct p2p_data *p2p)
3350 {
3351         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3352         if (p2p->go_neg_peer &&
3353             (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3354                 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3355                 p2p_go_neg_failed(p2p, -1);
3356                 return;
3357         }
3358         if (p2p->go_neg_peer &&
3359             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3360             p2p->go_neg_peer->connect_reqs < 120) {
3361                 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3362                 p2p_connect_send(p2p, p2p->go_neg_peer);
3363                 return;
3364         }
3365         if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3366                 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3367                 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3368                 p2p_set_timeout(p2p, 0, 30000);
3369                 return;
3370         }
3371         p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3372         p2p_listen_in_find(p2p, 0);
3373 }
3374
3375
3376 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3377 {
3378         if (p2p->go_neg_peer) {
3379                 if (p2p->drv_in_listen) {
3380                         p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3381                         return;
3382                 }
3383
3384                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3385                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3386                         p2p_go_neg_failed(p2p, -1);
3387                         return;
3388                 }
3389
3390                 p2p_set_state(p2p, P2P_CONNECT);
3391                 p2p_connect_send(p2p, p2p->go_neg_peer);
3392         } else
3393                 p2p_set_state(p2p, P2P_IDLE);
3394 }
3395
3396
3397 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3398 {
3399         p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3400
3401         if (p2p->cfg->is_concurrent_session_active &&
3402             p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3403                 p2p_set_timeout(p2p, 0, 500000);
3404         else
3405                 p2p_set_timeout(p2p, 0, 200000);
3406 }
3407
3408
3409 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3410 {
3411         struct p2p_device *dev = p2p->go_neg_peer;
3412
3413         if (dev == NULL) {
3414                 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3415                 return;
3416         }
3417
3418         p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3419         p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3420         p2p_listen_in_find(p2p, 0);
3421 }
3422
3423
3424 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3425 {
3426         p2p_dbg(p2p, "Service Discovery Query timeout");
3427         if (p2p->sd_peer) {
3428                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3429                 p2p->sd_peer = NULL;
3430         }
3431         p2p_continue_find(p2p);
3432 }
3433
3434
3435 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3436 {
3437         p2p_dbg(p2p, "Provision Discovery Request timeout");
3438         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3439         p2p_continue_find(p2p);
3440 }
3441
3442
3443 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3444 {
3445         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3446
3447         /*
3448          * For user initiated PD requests that we have not gotten any responses
3449          * for while in IDLE state, we retry them a couple of times before
3450          * giving up.
3451          */
3452         if (!p2p->user_initiated_pd)
3453                 return;
3454
3455         p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3456
3457         if (p2p->pd_retries) {
3458                 p2p->pd_retries--;
3459                 p2p_retry_pd(p2p);
3460         } else {
3461                 struct p2p_device *dev;
3462                 int for_join = 0;
3463
3464                 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3465                         if (os_memcmp(p2p->pending_pd_devaddr,
3466                                       dev->info.p2p_device_addr, ETH_ALEN) != 0)
3467                                 continue;
3468                         if (dev->req_config_methods &&
3469                             (dev->flags & P2P_DEV_PD_FOR_JOIN))
3470                                 for_join = 1;
3471                 }
3472
3473                 if (p2p->cfg->prov_disc_fail)
3474                         p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3475                                                  p2p->pending_pd_devaddr,
3476                                                  for_join ?
3477                                                  P2P_PROV_DISC_TIMEOUT_JOIN :
3478                                                  P2P_PROV_DISC_TIMEOUT);
3479                 p2p_reset_pending_pd(p2p);
3480         }
3481 }
3482
3483
3484 static void p2p_timeout_invite(struct p2p_data *p2p)
3485 {
3486         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3487         p2p_set_state(p2p, P2P_INVITE_LISTEN);
3488         if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3489                 /*
3490                  * Better remain on operating channel instead of listen channel
3491                  * when running a group.
3492                  */
3493                 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
3494                 p2p_set_timeout(p2p, 0, 100000);
3495                 return;
3496         }
3497         p2p_listen_in_find(p2p, 0);
3498 }
3499
3500
3501 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3502 {
3503         if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3504                 p2p_set_state(p2p, P2P_INVITE);
3505                 p2p_invite_send(p2p, p2p->invite_peer,
3506                                 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
3507         } else {
3508                 if (p2p->invite_peer) {
3509                         p2p_dbg(p2p, "Invitation Request retry limit reached");
3510                         if (p2p->cfg->invitation_result)
3511                                 p2p->cfg->invitation_result(
3512                                         p2p->cfg->cb_ctx, -1, NULL, NULL,
3513                                         p2p->invite_peer->info.p2p_device_addr,
3514                                         0, 0);
3515                 }
3516                 p2p_set_state(p2p, P2P_IDLE);
3517         }
3518 }
3519
3520
3521 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3522 {
3523         struct p2p_data *p2p = eloop_ctx;
3524
3525         p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
3526
3527         p2p->in_listen = 0;
3528         if (p2p->drv_in_listen) {
3529                 p2p_dbg(p2p, "Driver is still in listen state - stop it");
3530                 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
3531         }
3532
3533         switch (p2p->state) {
3534         case P2P_IDLE:
3535                 /* Check if we timed out waiting for PD req */
3536                 if (p2p->pending_action_state == P2P_PENDING_PD)
3537                         p2p_timeout_prov_disc_req(p2p);
3538                 break;
3539         case P2P_SEARCH:
3540                 /* Check if we timed out waiting for PD req */
3541                 if (p2p->pending_action_state == P2P_PENDING_PD)
3542                         p2p_timeout_prov_disc_req(p2p);
3543                 if (p2p->search_delay && !p2p->in_search_delay) {
3544                         p2p_dbg(p2p, "Delay search operation by %u ms",
3545                                 p2p->search_delay);
3546                         p2p->in_search_delay = 1;
3547                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3548                                         (p2p->search_delay % 1000) * 1000);
3549                         break;
3550                 }
3551                 p2p->in_search_delay = 0;
3552                 p2p_search(p2p);
3553                 break;
3554         case P2P_CONNECT:
3555                 p2p_timeout_connect(p2p);
3556                 break;
3557         case P2P_CONNECT_LISTEN:
3558                 p2p_timeout_connect_listen(p2p);
3559                 break;
3560         case P2P_GO_NEG:
3561                 break;
3562         case P2P_LISTEN_ONLY:
3563                 /* Check if we timed out waiting for PD req */
3564                 if (p2p->pending_action_state == P2P_PENDING_PD)
3565                         p2p_timeout_prov_disc_req(p2p);
3566
3567                 if (p2p->ext_listen_only) {
3568                         p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
3569                         p2p->ext_listen_only = 0;
3570                         p2p_set_state(p2p, P2P_IDLE);
3571                 }
3572                 break;
3573         case P2P_WAIT_PEER_CONNECT:
3574                 p2p_timeout_wait_peer_connect(p2p);
3575                 break;
3576         case P2P_WAIT_PEER_IDLE:
3577                 p2p_timeout_wait_peer_idle(p2p);
3578                 break;
3579         case P2P_SD_DURING_FIND:
3580                 p2p_timeout_sd_during_find(p2p);
3581                 break;
3582         case P2P_PROVISIONING:
3583                 break;
3584         case P2P_PD_DURING_FIND:
3585                 p2p_timeout_prov_disc_during_find(p2p);
3586                 break;
3587         case P2P_INVITE:
3588                 p2p_timeout_invite(p2p);
3589                 break;
3590         case P2P_INVITE_LISTEN:
3591                 p2p_timeout_invite_listen(p2p);
3592                 break;
3593         }
3594 }
3595
3596
3597 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
3598 {
3599         struct p2p_device *dev;
3600
3601         dev = p2p_get_device(p2p, peer_addr);
3602         p2p_dbg(p2p, "Local request to reject connection attempts by peer "
3603                 MACSTR, MAC2STR(peer_addr));
3604         if (dev == NULL) {
3605                 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
3606                 return -1;
3607         }
3608         dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
3609         dev->flags |= P2P_DEV_USER_REJECTED;
3610         return 0;
3611 }
3612
3613
3614 const char * p2p_wps_method_text(enum p2p_wps_method method)
3615 {
3616         switch (method) {
3617         case WPS_NOT_READY:
3618                 return "not-ready";
3619         case WPS_PIN_DISPLAY:
3620                 return "Display";
3621         case WPS_PIN_KEYPAD:
3622                 return "Keypad";
3623         case WPS_PBC:
3624                 return "PBC";
3625         case WPS_NFC:
3626                 return "NFC";
3627         }
3628
3629         return "??";
3630 }
3631
3632
3633 static const char * p2p_go_state_text(enum p2p_go_state go_state)
3634 {
3635         switch (go_state) {
3636         case UNKNOWN_GO:
3637                 return "unknown";
3638         case LOCAL_GO:
3639                 return "local";
3640         case  REMOTE_GO:
3641                 return "remote";
3642         }
3643
3644         return "??";
3645 }
3646
3647
3648 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
3649                                                const u8 *addr, int next)
3650 {
3651         struct p2p_device *dev;
3652
3653         if (addr)
3654                 dev = p2p_get_device(p2p, addr);
3655         else
3656                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
3657
3658         if (dev && next) {
3659                 dev = dl_list_first(&dev->list, struct p2p_device, list);
3660                 if (&dev->list == &p2p->devices)
3661                         dev = NULL;
3662         }
3663
3664         if (dev == NULL)
3665                 return NULL;
3666
3667         return &dev->info;
3668 }
3669
3670
3671 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
3672                           char *buf, size_t buflen)
3673 {
3674         struct p2p_device *dev;
3675         int res;
3676         char *pos, *end;
3677         struct os_reltime now;
3678
3679         if (info == NULL)
3680                 return -1;
3681
3682         dev = (struct p2p_device *) (((u8 *) info) -
3683                                      offsetof(struct p2p_device, info));
3684
3685         pos = buf;
3686         end = buf + buflen;
3687
3688         os_get_reltime(&now);
3689         res = os_snprintf(pos, end - pos,
3690                           "age=%d\n"
3691                           "listen_freq=%d\n"
3692                           "wps_method=%s\n"
3693                           "interface_addr=" MACSTR "\n"
3694                           "member_in_go_dev=" MACSTR "\n"
3695                           "member_in_go_iface=" MACSTR "\n"
3696                           "go_neg_req_sent=%d\n"
3697                           "go_state=%s\n"
3698                           "dialog_token=%u\n"
3699                           "intended_addr=" MACSTR "\n"
3700                           "country=%c%c\n"
3701                           "oper_freq=%d\n"
3702                           "req_config_methods=0x%x\n"
3703                           "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
3704                           "status=%d\n"
3705                           "invitation_reqs=%u\n",
3706                           (int) (now.sec - dev->last_seen.sec),
3707                           dev->listen_freq,
3708                           p2p_wps_method_text(dev->wps_method),
3709                           MAC2STR(dev->interface_addr),
3710                           MAC2STR(dev->member_in_go_dev),
3711                           MAC2STR(dev->member_in_go_iface),
3712                           dev->go_neg_req_sent,
3713                           p2p_go_state_text(dev->go_state),
3714                           dev->dialog_token,
3715                           MAC2STR(dev->intended_addr),
3716                           dev->country[0] ? dev->country[0] : '_',
3717                           dev->country[1] ? dev->country[1] : '_',
3718                           dev->oper_freq,
3719                           dev->req_config_methods,
3720                           dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
3721                           "[PROBE_REQ_ONLY]" : "",
3722                           dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
3723                           dev->flags & P2P_DEV_NOT_YET_READY ?
3724                           "[NOT_YET_READY]" : "",
3725                           dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
3726                           "[PD_PEER_DISPLAY]" : "",
3727                           dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
3728                           "[PD_PEER_KEYPAD]" : "",
3729                           dev->flags & P2P_DEV_USER_REJECTED ?
3730                           "[USER_REJECTED]" : "",
3731                           dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
3732                           "[PEER_WAITING_RESPONSE]" : "",
3733                           dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
3734                           "[PREFER_PERSISTENT_GROUP]" : "",
3735                           dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
3736                           "[WAIT_GO_NEG_RESPONSE]" : "",
3737                           dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
3738                           "[WAIT_GO_NEG_CONFIRM]" : "",
3739                           dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
3740                           "[GROUP_CLIENT_ONLY]" : "",
3741                           dev->flags & P2P_DEV_FORCE_FREQ ?
3742                           "[FORCE_FREQ]" : "",
3743                           dev->flags & P2P_DEV_PD_FOR_JOIN ?
3744                           "[PD_FOR_JOIN]" : "",
3745                           dev->status,
3746                           dev->invitation_reqs);
3747         if (res < 0 || res >= end - pos)
3748                 return pos - buf;
3749         pos += res;
3750
3751         if (dev->ext_listen_period) {
3752                 res = os_snprintf(pos, end - pos,
3753                                   "ext_listen_period=%u\n"
3754                                   "ext_listen_interval=%u\n",
3755                                   dev->ext_listen_period,
3756                                   dev->ext_listen_interval);
3757                 if (res < 0 || res >= end - pos)
3758                         return pos - buf;
3759                 pos += res;
3760         }
3761
3762         if (dev->oper_ssid_len) {
3763                 res = os_snprintf(pos, end - pos,
3764                                   "oper_ssid=%s\n",
3765                                   wpa_ssid_txt(dev->oper_ssid,
3766                                                dev->oper_ssid_len));
3767                 if (res < 0 || res >= end - pos)
3768                         return pos - buf;
3769                 pos += res;
3770         }
3771
3772 #ifdef CONFIG_WIFI_DISPLAY
3773         if (dev->info.wfd_subelems) {
3774                 res = os_snprintf(pos, end - pos, "wfd_subelems=");
3775                 if (res < 0 || res >= end - pos)
3776                         return pos - buf;
3777                 pos += res;
3778
3779                 pos += wpa_snprintf_hex(pos, end - pos,
3780                                         wpabuf_head(dev->info.wfd_subelems),
3781                                         wpabuf_len(dev->info.wfd_subelems));
3782
3783                 res = os_snprintf(pos, end - pos, "\n");
3784                 if (res < 0 || res >= end - pos)
3785                         return pos - buf;
3786                 pos += res;
3787         }
3788 #endif /* CONFIG_WIFI_DISPLAY */
3789
3790         return pos - buf;
3791 }
3792
3793
3794 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
3795 {
3796         return p2p_get_device(p2p, addr) != NULL;
3797 }
3798
3799
3800 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
3801 {
3802         if (enabled) {
3803                 p2p_dbg(p2p, "Client discoverability enabled");
3804                 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3805         } else {
3806                 p2p_dbg(p2p, "Client discoverability disabled");
3807                 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3808         }
3809 }
3810
3811
3812 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
3813                                               u32 duration2, u32 interval2)
3814 {
3815         struct wpabuf *req;
3816         struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
3817         u8 *len;
3818
3819         req = wpabuf_alloc(100);
3820         if (req == NULL)
3821                 return NULL;
3822
3823         if (duration1 || interval1) {
3824                 os_memset(&desc1, 0, sizeof(desc1));
3825                 desc1.count_type = 1;
3826                 desc1.duration = duration1;
3827                 desc1.interval = interval1;
3828                 ptr1 = &desc1;
3829
3830                 if (duration2 || interval2) {
3831                         os_memset(&desc2, 0, sizeof(desc2));
3832                         desc2.count_type = 2;
3833                         desc2.duration = duration2;
3834                         desc2.interval = interval2;
3835                         ptr2 = &desc2;
3836                 }
3837         }
3838
3839         p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
3840         len = p2p_buf_add_ie_hdr(req);
3841         p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
3842         p2p_buf_update_ie_hdr(req, len);
3843
3844         return req;
3845 }
3846
3847
3848 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
3849                      const u8 *own_interface_addr, unsigned int freq,
3850                      u32 duration1, u32 interval1, u32 duration2,
3851                      u32 interval2)
3852 {
3853         struct wpabuf *req;
3854
3855         p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
3856                 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
3857                 "dur2=%u int2=%u",
3858                 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
3859                 freq, duration1, interval1, duration2, interval2);
3860
3861         req = p2p_build_presence_req(duration1, interval1, duration2,
3862                                      interval2);
3863         if (req == NULL)
3864                 return -1;
3865
3866         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3867         if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
3868                             go_interface_addr,
3869                             wpabuf_head(req), wpabuf_len(req), 200) < 0) {
3870                 p2p_dbg(p2p, "Failed to send Action frame");
3871         }
3872         wpabuf_free(req);
3873
3874         return 0;
3875 }
3876
3877
3878 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
3879                                                size_t noa_len, u8 dialog_token)
3880 {
3881         struct wpabuf *resp;
3882         u8 *len;
3883
3884         resp = wpabuf_alloc(100 + noa_len);
3885         if (resp == NULL)
3886                 return NULL;
3887
3888         p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
3889         len = p2p_buf_add_ie_hdr(resp);
3890         p2p_buf_add_status(resp, status);
3891         if (noa) {
3892                 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
3893                 wpabuf_put_le16(resp, noa_len);
3894                 wpabuf_put_data(resp, noa, noa_len);
3895         } else
3896                 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
3897         p2p_buf_update_ie_hdr(resp, len);
3898
3899         return resp;
3900 }
3901
3902
3903 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
3904                                      const u8 *sa, const u8 *data, size_t len,
3905                                      int rx_freq)
3906 {
3907         struct p2p_message msg;
3908         u8 status;
3909         struct wpabuf *resp;
3910         size_t g;
3911         struct p2p_group *group = NULL;
3912         int parsed = 0;
3913         u8 noa[50];
3914         int noa_len;
3915
3916         p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
3917
3918         for (g = 0; g < p2p->num_groups; g++) {
3919                 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
3920                               ETH_ALEN) == 0) {
3921                         group = p2p->groups[g];
3922                         break;
3923                 }
3924         }
3925         if (group == NULL) {
3926                 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
3927                         MACSTR, MAC2STR(da));
3928                 return;
3929         }
3930
3931         if (p2p_parse(data, len, &msg) < 0) {
3932                 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
3933                 status = P2P_SC_FAIL_INVALID_PARAMS;
3934                 goto fail;
3935         }
3936         parsed = 1;
3937
3938         if (msg.noa == NULL) {
3939                 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
3940                 status = P2P_SC_FAIL_INVALID_PARAMS;
3941                 goto fail;
3942         }
3943
3944         status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
3945
3946 fail:
3947         if (p2p->cfg->get_noa)
3948                 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
3949                                             sizeof(noa));
3950         else
3951                 noa_len = -1;
3952         resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
3953                                        noa_len > 0 ? noa_len : 0,
3954                                        msg.dialog_token);
3955         if (parsed)
3956                 p2p_parse_free(&msg);
3957         if (resp == NULL)
3958                 return;
3959
3960         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3961         if (p2p_send_action(p2p, rx_freq, sa, da, da,
3962                             wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
3963                 p2p_dbg(p2p, "Failed to send Action frame");
3964         }
3965         wpabuf_free(resp);
3966 }
3967
3968
3969 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
3970                                       const u8 *sa, const u8 *data, size_t len)
3971 {
3972         struct p2p_message msg;
3973
3974         p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
3975
3976         if (p2p_parse(data, len, &msg) < 0) {
3977                 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
3978                 return;
3979         }
3980
3981         if (msg.status == NULL || msg.noa == NULL) {
3982                 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
3983                 p2p_parse_free(&msg);
3984                 return;
3985         }
3986
3987         if (p2p->cfg->presence_resp) {
3988                 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
3989                                         msg.noa, msg.noa_len);
3990         }
3991
3992         if (*msg.status) {
3993                 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
3994                         *msg.status);
3995                 p2p_parse_free(&msg);
3996                 return;
3997         }
3998
3999         p2p_dbg(p2p, "P2P Presence Request was accepted");
4000         wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
4001                     msg.noa, msg.noa_len);
4002         /* TODO: process NoA */
4003         p2p_parse_free(&msg);
4004 }
4005
4006
4007 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
4008 {
4009         struct p2p_data *p2p = eloop_ctx;
4010
4011         if (p2p->ext_listen_interval) {
4012                 /* Schedule next extended listen timeout */
4013                 eloop_register_timeout(p2p->ext_listen_interval_sec,
4014                                        p2p->ext_listen_interval_usec,
4015                                        p2p_ext_listen_timeout, p2p, NULL);
4016         }
4017
4018         if ((p2p->cfg->is_p2p_in_progress &&
4019              p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
4020             (p2p->pending_action_state == P2P_PENDING_PD &&
4021              p2p->pd_retries > 0)) {
4022                 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
4023                         p2p_state_txt(p2p->state));
4024                 return;
4025         }
4026
4027         if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
4028                 /*
4029                  * This should not really happen, but it looks like the Listen
4030                  * command may fail is something else (e.g., a scan) was
4031                  * running at an inconvenient time. As a workaround, allow new
4032                  * Extended Listen operation to be started.
4033                  */
4034                 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
4035                 p2p->ext_listen_only = 0;
4036                 p2p_set_state(p2p, P2P_IDLE);
4037         }
4038
4039         if (p2p->state != P2P_IDLE) {
4040                 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
4041                 return;
4042         }
4043
4044         p2p_dbg(p2p, "Extended Listen timeout");
4045         p2p->ext_listen_only = 1;
4046         if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
4047                 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
4048                 p2p->ext_listen_only = 0;
4049         }
4050 }
4051
4052
4053 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
4054                    unsigned int interval)
4055 {
4056         if (period > 65535 || interval > 65535 || period > interval ||
4057             (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
4058                 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
4059                         period, interval);
4060                 return -1;
4061         }
4062
4063         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
4064
4065         if (interval == 0) {
4066                 p2p_dbg(p2p, "Disabling Extended Listen Timing");
4067                 p2p->ext_listen_period = 0;
4068                 p2p->ext_listen_interval = 0;
4069                 return 0;
4070         }
4071
4072         p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
4073                 period, interval);
4074         p2p->ext_listen_period = period;
4075         p2p->ext_listen_interval = interval;
4076         p2p->ext_listen_interval_sec = interval / 1000;
4077         p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
4078
4079         eloop_register_timeout(p2p->ext_listen_interval_sec,
4080                                p2p->ext_listen_interval_usec,
4081                                p2p_ext_listen_timeout, p2p, NULL);
4082
4083         return 0;
4084 }
4085
4086
4087 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4088                       const u8 *ie, size_t ie_len)
4089 {
4090         struct p2p_message msg;
4091
4092         if (bssid == NULL || ie == NULL)
4093                 return;
4094
4095         os_memset(&msg, 0, sizeof(msg));
4096         if (p2p_parse_ies(ie, ie_len, &msg))
4097                 return;
4098         if (msg.minor_reason_code == NULL) {
4099                 p2p_parse_free(&msg);
4100                 return;
4101         }
4102
4103         p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
4104                 " reason_code=%u minor_reason_code=%u",
4105                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4106
4107         p2p_parse_free(&msg);
4108 }
4109
4110
4111 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4112                         const u8 *ie, size_t ie_len)
4113 {
4114         struct p2p_message msg;
4115
4116         if (bssid == NULL || ie == NULL)
4117                 return;
4118
4119         os_memset(&msg, 0, sizeof(msg));
4120         if (p2p_parse_ies(ie, ie_len, &msg))
4121                 return;
4122         if (msg.minor_reason_code == NULL) {
4123                 p2p_parse_free(&msg);
4124                 return;
4125         }
4126
4127         p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
4128                 " reason_code=%u minor_reason_code=%u",
4129                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4130
4131         p2p_parse_free(&msg);
4132 }
4133
4134
4135 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
4136 {
4137         if (enabled) {
4138                 p2p_dbg(p2p, "Managed P2P Device operations enabled");
4139                 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
4140         } else {
4141                 p2p_dbg(p2p, "Managed P2P Device operations disabled");
4142                 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
4143         }
4144 }
4145
4146
4147 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class,
4148                                  u8 *op_channel)
4149 {
4150         return p2p_channel_random_social(&p2p->channels, op_class, op_channel);
4151 }
4152
4153
4154 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
4155                            u8 forced)
4156 {
4157         if (p2p_channel_to_freq(reg_class, channel) < 0)
4158                 return -1;
4159
4160         p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
4161                 reg_class, channel);
4162
4163         /*
4164          * Listen channel was set in configuration or set by control interface;
4165          * cannot override it.
4166          */
4167         if (p2p->cfg->channel_forced && forced == 0)
4168                 return -1;
4169
4170         if (p2p->state == P2P_IDLE) {
4171                 p2p->cfg->reg_class = reg_class;
4172                 p2p->cfg->channel = channel;
4173                 p2p->cfg->channel_forced = forced;
4174         } else {
4175                 p2p_dbg(p2p, "Defer setting listen channel");
4176                 p2p->pending_reg_class = reg_class;
4177                 p2p->pending_channel = channel;
4178                 p2p->pending_channel_forced = forced;
4179         }
4180
4181         return 0;
4182 }
4183
4184
4185 u8 p2p_get_listen_channel(struct p2p_data *p2p)
4186 {
4187         return p2p->cfg->channel;
4188 }
4189
4190
4191 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
4192 {
4193         p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
4194         if (postfix == NULL) {
4195                 p2p->cfg->ssid_postfix_len = 0;
4196                 return 0;
4197         }
4198         if (len > sizeof(p2p->cfg->ssid_postfix))
4199                 return -1;
4200         os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
4201         p2p->cfg->ssid_postfix_len = len;
4202         return 0;
4203 }
4204
4205
4206 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
4207                          int cfg_op_channel)
4208 {
4209         if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
4210                 return -1;
4211
4212         p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
4213                 op_reg_class, op_channel);
4214         p2p->cfg->op_reg_class = op_reg_class;
4215         p2p->cfg->op_channel = op_channel;
4216         p2p->cfg->cfg_op_channel = cfg_op_channel;
4217         return 0;
4218 }
4219
4220
4221 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
4222                       const struct p2p_channel *pref_chan)
4223 {
4224         struct p2p_channel *n;
4225
4226         if (pref_chan) {
4227                 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
4228                 if (n == NULL)
4229                         return -1;
4230                 os_memcpy(n, pref_chan,
4231                           num_pref_chan * sizeof(struct p2p_channel));
4232         } else
4233                 n = NULL;
4234
4235         os_free(p2p->cfg->pref_chan);
4236         p2p->cfg->pref_chan = n;
4237         p2p->cfg->num_pref_chan = num_pref_chan;
4238
4239         return 0;
4240 }
4241
4242
4243 int p2p_set_no_go_freq(struct p2p_data *p2p,
4244                        const struct wpa_freq_range_list *list)
4245 {
4246         struct wpa_freq_range *tmp;
4247
4248         if (list == NULL || list->num == 0) {
4249                 os_free(p2p->no_go_freq.range);
4250                 p2p->no_go_freq.range = NULL;
4251                 p2p->no_go_freq.num = 0;
4252                 return 0;
4253         }
4254
4255         tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4256         if (tmp == NULL)
4257                 return -1;
4258         os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4259         os_free(p2p->no_go_freq.range);
4260         p2p->no_go_freq.range = tmp;
4261         p2p->no_go_freq.num = list->num;
4262         p2p_dbg(p2p, "Updated no GO chan list");
4263
4264         return 0;
4265 }
4266
4267
4268 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4269                            u8 *iface_addr)
4270 {
4271         struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4272         if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4273                 return -1;
4274         os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4275         return 0;
4276 }
4277
4278
4279 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4280                            u8 *dev_addr)
4281 {
4282         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4283         if (dev == NULL)
4284                 return -1;
4285         os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4286         return 0;
4287 }
4288
4289
4290 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4291 {
4292         os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4293         if (is_zero_ether_addr(p2p->peer_filter))
4294                 p2p_dbg(p2p, "Disable peer filter");
4295         else
4296                 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4297                         MAC2STR(p2p->peer_filter));
4298 }
4299
4300
4301 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4302 {
4303         p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4304         if (p2p->cross_connect == enabled)
4305                 return;
4306         p2p->cross_connect = enabled;
4307         /* TODO: may need to tear down any action group where we are GO(?) */
4308 }
4309
4310
4311 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4312 {
4313         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4314         if (dev == NULL)
4315                 return -1;
4316         if (dev->oper_freq <= 0)
4317                 return -1;
4318         return dev->oper_freq;
4319 }
4320
4321
4322 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4323 {
4324         p2p_dbg(p2p, "Intra BSS distribution %s",
4325                 enabled ? "enabled" : "disabled");
4326         p2p->cfg->p2p_intra_bss = enabled;
4327 }
4328
4329
4330 void p2p_update_channel_list(struct p2p_data *p2p,
4331                              const struct p2p_channels *chan,
4332                              const struct p2p_channels *cli_chan)
4333 {
4334         p2p_dbg(p2p, "Update channel list");
4335         os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4336         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4337         os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4338                   sizeof(struct p2p_channels));
4339         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4340 }
4341
4342
4343 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4344                     const u8 *src, const u8 *bssid, const u8 *buf,
4345                     size_t len, unsigned int wait_time)
4346 {
4347         if (p2p->p2p_scan_running) {
4348                 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4349                 if (p2p->after_scan_tx) {
4350                         p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4351                         os_free(p2p->after_scan_tx);
4352                 }
4353                 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4354                                                len);
4355                 if (p2p->after_scan_tx == NULL)
4356                         return -1;
4357                 p2p->after_scan_tx->freq = freq;
4358                 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4359                 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4360                 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4361                 p2p->after_scan_tx->len = len;
4362                 p2p->after_scan_tx->wait_time = wait_time;
4363                 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4364                 return 0;
4365         }
4366
4367         return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4368                                      buf, len, wait_time);
4369 }
4370
4371
4372 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4373                            int freq_overall)
4374 {
4375         p2p_dbg(p2p, "Best channel: 2.4 GHz: %d,  5 GHz: %d,  overall: %d",
4376                 freq_24, freq_5, freq_overall);
4377         p2p->best_freq_24 = freq_24;
4378         p2p->best_freq_5 = freq_5;
4379         p2p->best_freq_overall = freq_overall;
4380 }
4381
4382
4383 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4384 {
4385         p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4386         p2p->own_freq_preference = freq;
4387 }
4388
4389
4390 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4391 {
4392         if (p2p == NULL || p2p->go_neg_peer == NULL)
4393                 return NULL;
4394         return p2p->go_neg_peer->info.p2p_device_addr;
4395 }
4396
4397
4398 const struct p2p_peer_info *
4399 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4400 {
4401         struct p2p_device *dev;
4402
4403         if (addr) {
4404                 dev = p2p_get_device(p2p, addr);
4405                 if (!dev)
4406                         return NULL;
4407
4408                 if (!next) {
4409                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4410                                 return NULL;
4411
4412                         return &dev->info;
4413                 } else {
4414                         do {
4415                                 dev = dl_list_first(&dev->list,
4416                                                     struct p2p_device,
4417                                                     list);
4418                                 if (!dev || &dev->list == &p2p->devices)
4419                                         return NULL;
4420                         } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4421                 }
4422         } else {
4423                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4424                 if (!dev)
4425                         return NULL;
4426                 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4427                         dev = dl_list_first(&dev->list,
4428                                             struct p2p_device,
4429                                             list);
4430                         if (!dev || &dev->list == &p2p->devices)
4431                                 return NULL;
4432                 }
4433         }
4434
4435         return &dev->info;
4436 }
4437
4438
4439 int p2p_in_progress(struct p2p_data *p2p)
4440 {
4441         if (p2p == NULL)
4442                 return 0;
4443         if (p2p->state == P2P_SEARCH)
4444                 return 2;
4445         return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4446 }
4447
4448
4449 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4450                             u8 client_timeout)
4451 {
4452         if (p2p) {
4453                 p2p->go_timeout = go_timeout;
4454                 p2p->client_timeout = client_timeout;
4455         }
4456 }
4457
4458
4459 #ifdef CONFIG_WIFI_DISPLAY
4460
4461 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4462 {
4463         size_t g;
4464         struct p2p_group *group;
4465
4466         for (g = 0; g < p2p->num_groups; g++) {
4467                 group = p2p->groups[g];
4468                 p2p_group_force_beacon_update_ies(group);
4469         }
4470 }
4471
4472
4473 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4474 {
4475         wpabuf_free(p2p->wfd_ie_beacon);
4476         p2p->wfd_ie_beacon = ie;
4477         p2p_update_wfd_ie_groups(p2p);
4478         return 0;
4479 }
4480
4481
4482 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4483 {
4484         wpabuf_free(p2p->wfd_ie_probe_req);
4485         p2p->wfd_ie_probe_req = ie;
4486         return 0;
4487 }
4488
4489
4490 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4491 {
4492         wpabuf_free(p2p->wfd_ie_probe_resp);
4493         p2p->wfd_ie_probe_resp = ie;
4494         p2p_update_wfd_ie_groups(p2p);
4495         return 0;
4496 }
4497
4498
4499 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4500 {
4501         wpabuf_free(p2p->wfd_ie_assoc_req);
4502         p2p->wfd_ie_assoc_req = ie;
4503         return 0;
4504 }
4505
4506
4507 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4508 {
4509         wpabuf_free(p2p->wfd_ie_invitation);
4510         p2p->wfd_ie_invitation = ie;
4511         return 0;
4512 }
4513
4514
4515 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4516 {
4517         wpabuf_free(p2p->wfd_ie_prov_disc_req);
4518         p2p->wfd_ie_prov_disc_req = ie;
4519         return 0;
4520 }
4521
4522
4523 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
4524 {
4525         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
4526         p2p->wfd_ie_prov_disc_resp = ie;
4527         return 0;
4528 }
4529
4530
4531 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
4532 {
4533         wpabuf_free(p2p->wfd_ie_go_neg);
4534         p2p->wfd_ie_go_neg = ie;
4535         return 0;
4536 }
4537
4538
4539 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
4540 {
4541         wpabuf_free(p2p->wfd_dev_info);
4542         if (elem) {
4543                 p2p->wfd_dev_info = wpabuf_dup(elem);
4544                 if (p2p->wfd_dev_info == NULL)
4545                         return -1;
4546         } else
4547                 p2p->wfd_dev_info = NULL;
4548
4549         return 0;
4550 }
4551
4552
4553 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
4554 {
4555         wpabuf_free(p2p->wfd_assoc_bssid);
4556         if (elem) {
4557                 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
4558                 if (p2p->wfd_assoc_bssid == NULL)
4559                         return -1;
4560         } else
4561                 p2p->wfd_assoc_bssid = NULL;
4562
4563         return 0;
4564 }
4565
4566
4567 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
4568                                   const struct wpabuf *elem)
4569 {
4570         wpabuf_free(p2p->wfd_coupled_sink_info);
4571         if (elem) {
4572                 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
4573                 if (p2p->wfd_coupled_sink_info == NULL)
4574                         return -1;
4575         } else
4576                 p2p->wfd_coupled_sink_info = NULL;
4577
4578         return 0;
4579 }
4580
4581 #endif /* CONFIG_WIFI_DISPLAY */
4582
4583
4584 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
4585                      int max_disc_tu)
4586 {
4587         if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
4588                 return -1;
4589
4590         p2p->min_disc_int = min_disc_int;
4591         p2p->max_disc_int = max_disc_int;
4592         p2p->max_disc_tu = max_disc_tu;
4593         p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
4594                 min_disc_int, max_disc_int, max_disc_tu);
4595
4596         return 0;
4597 }
4598
4599
4600 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
4601 {
4602         va_list ap;
4603         char buf[500];
4604
4605         if (!p2p->cfg->debug_print)
4606                 return;
4607
4608         va_start(ap, fmt);
4609         vsnprintf(buf, sizeof(buf), fmt, ap);
4610         buf[sizeof(buf) - 1] = '\0';
4611         va_end(ap);
4612         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
4613 }
4614
4615
4616 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
4617 {
4618         va_list ap;
4619         char buf[500];
4620
4621         if (!p2p->cfg->debug_print)
4622                 return;
4623
4624         va_start(ap, fmt);
4625         vsnprintf(buf, sizeof(buf), fmt, ap);
4626         buf[sizeof(buf) - 1] = '\0';
4627         va_end(ap);
4628         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
4629 }
4630
4631
4632 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
4633 {
4634         va_list ap;
4635         char buf[500];
4636
4637         if (!p2p->cfg->debug_print)
4638                 return;
4639
4640         va_start(ap, fmt);
4641         vsnprintf(buf, sizeof(buf), fmt, ap);
4642         buf[sizeof(buf) - 1] = '\0';
4643         va_end(ap);
4644         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
4645 }
4646
4647
4648 void p2p_loop_on_known_peers(struct p2p_data *p2p,
4649                              void (*peer_callback)(struct p2p_peer_info *peer,
4650                                                    void *user_data),
4651                              void *user_data)
4652 {
4653         struct p2p_device *dev, *n;
4654
4655         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
4656                 peer_callback(&dev->info, user_data);
4657         }
4658 }
4659
4660
4661 #ifdef CONFIG_WPS_NFC
4662
4663 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
4664                                               int client_freq,
4665                                               const u8 *go_dev_addr,
4666                                               const u8 *ssid, size_t ssid_len)
4667 {
4668         struct wpabuf *buf;
4669         u8 op_class, channel;
4670         enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
4671
4672         buf = wpabuf_alloc(1000);
4673         if (buf == NULL)
4674                 return NULL;
4675
4676         op_class = p2p->cfg->reg_class;
4677         channel = p2p->cfg->channel;
4678
4679         p2p_buf_add_capability(buf, p2p->dev_capab &
4680                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
4681         p2p_buf_add_device_info(buf, p2p, NULL);
4682
4683         if (p2p->num_groups > 0) {
4684                 int freq = p2p_group_get_freq(p2p->groups[0]);
4685                 role = P2P_GO_IN_A_GROUP;
4686                 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
4687                         p2p_dbg(p2p,
4688                                 "Unknown GO operating frequency %d MHz for NFC handover",
4689                                 freq);
4690                         wpabuf_free(buf);
4691                         return NULL;
4692                 }
4693         } else if (client_freq > 0) {
4694                 role = P2P_CLIENT_IN_A_GROUP;
4695                 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
4696                         p2p_dbg(p2p,
4697                                 "Unknown client operating frequency %d MHz for NFC handover",
4698                                 client_freq);
4699                         wpabuf_free(buf);
4700                         return NULL;
4701                 }
4702         }
4703
4704         p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
4705                                        channel, role);
4706
4707         if (p2p->num_groups > 0) {
4708                 /* Limit number of clients to avoid very long message */
4709                 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
4710                 p2p_group_buf_add_id(p2p->groups[0], buf);
4711         } else if (client_freq > 0 &&
4712                    go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
4713                    ssid && ssid_len > 0) {
4714                 /*
4715                  * Add the optional P2P Group ID to indicate in which group this
4716                  * device is a P2P Client.
4717                  */
4718                 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
4719         }
4720
4721         return buf;
4722 }
4723
4724
4725 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
4726                                            int client_freq,
4727                                            const u8 *go_dev_addr,
4728                                            const u8 *ssid, size_t ssid_len)
4729 {
4730         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
4731                                       ssid_len);
4732 }
4733
4734
4735 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
4736                                            int client_freq,
4737                                            const u8 *go_dev_addr,
4738                                            const u8 *ssid, size_t ssid_len)
4739 {
4740         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
4741                                       ssid_len);
4742 }
4743
4744
4745 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
4746                                         struct p2p_nfc_params *params)
4747 {
4748         struct p2p_message msg;
4749         struct p2p_device *dev;
4750         const u8 *p2p_dev_addr;
4751         int freq;
4752         enum p2p_role_indication role;
4753
4754         params->next_step = NO_ACTION;
4755
4756         if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
4757                                    params->p2p_attr, params->p2p_len, &msg)) {
4758                 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
4759                 p2p_parse_free(&msg);
4760                 return -1;
4761         }
4762
4763         if (msg.p2p_device_addr)
4764                 p2p_dev_addr = msg.p2p_device_addr;
4765         else if (msg.device_id)
4766                 p2p_dev_addr = msg.device_id;
4767         else {
4768                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
4769                 p2p_parse_free(&msg);
4770                 return -1;
4771         }
4772
4773         if (msg.oob_dev_password) {
4774                 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
4775                           msg.oob_dev_password_len);
4776                 params->oob_dev_pw_len = msg.oob_dev_password_len;
4777         }
4778
4779         dev = p2p_create_device(p2p, p2p_dev_addr);
4780         if (dev == NULL) {
4781                 p2p_parse_free(&msg);
4782                 return -1;
4783         }
4784
4785         params->peer = &dev->info;
4786
4787         os_get_reltime(&dev->last_seen);
4788         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
4789         p2p_copy_wps_info(p2p, dev, 0, &msg);
4790
4791         if (!msg.oob_go_neg_channel) {
4792                 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
4793                 return -1;
4794         }
4795
4796         if (msg.oob_go_neg_channel[3] == 0 &&
4797             msg.oob_go_neg_channel[4] == 0)
4798                 freq = 0;
4799         else
4800                 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
4801                                            msg.oob_go_neg_channel[4]);
4802         if (freq < 0) {
4803                 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
4804                 return -1;
4805         }
4806         role = msg.oob_go_neg_channel[5];
4807
4808         if (role == P2P_GO_IN_A_GROUP) {
4809                 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
4810                 params->go_freq = freq;
4811         } else if (role == P2P_CLIENT_IN_A_GROUP) {
4812                 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
4813                         freq);
4814                 params->go_freq = freq;
4815         } else
4816                 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
4817         dev->oob_go_neg_freq = freq;
4818
4819         if (!params->sel && role != P2P_GO_IN_A_GROUP) {
4820                 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
4821                                            p2p->cfg->channel);
4822                 if (freq < 0) {
4823                         p2p_dbg(p2p, "Own listen channel not known");
4824                         return -1;
4825                 }
4826                 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
4827                 dev->oob_go_neg_freq = freq;
4828         }
4829
4830         if (msg.group_id) {
4831                 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
4832                 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
4833                 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
4834                           params->go_ssid_len);
4835         }
4836
4837         if (dev->flags & P2P_DEV_USER_REJECTED) {
4838                 p2p_dbg(p2p, "Do not report rejected device");
4839                 p2p_parse_free(&msg);
4840                 return 0;
4841         }
4842
4843         if (!(dev->flags & P2P_DEV_REPORTED)) {
4844                 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
4845                                     !(dev->flags & P2P_DEV_REPORTED_ONCE));
4846                 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
4847         }
4848         p2p_parse_free(&msg);
4849
4850         if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
4851                 params->next_step = BOTH_GO;
4852         else if (role == P2P_GO_IN_A_GROUP)
4853                 params->next_step = JOIN_GROUP;
4854         else if (role == P2P_CLIENT_IN_A_GROUP) {
4855                 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
4856                 params->next_step = PEER_CLIENT;
4857         } else if (p2p->num_groups > 0)
4858                 params->next_step = AUTH_JOIN;
4859         else if (params->sel)
4860                 params->next_step = INIT_GO_NEG;
4861         else
4862                 params->next_step = RESP_GO_NEG;
4863
4864         return 0;
4865 }
4866
4867
4868 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
4869                                       int go_intent,
4870                                       const u8 *own_interface_addr)
4871 {
4872
4873         p2p->authorized_oob_dev_pw_id = dev_pw_id;
4874         if (dev_pw_id == 0) {
4875                 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
4876                 return;
4877         }
4878
4879         p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
4880                 dev_pw_id);
4881
4882         p2p->go_intent = go_intent;
4883         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
4884 }
4885
4886 #endif /* CONFIG_WPS_NFC */
4887
4888
4889 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
4890 {
4891         if (len < 8 || len > 63)
4892                 return -1;
4893         p2p->cfg->passphrase_len = len;
4894         return 0;
4895 }
4896
4897
4898 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
4899 {
4900         p2p->vendor_elem = vendor_elem;
4901 }
4902
4903
4904 void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx)
4905 {
4906         struct p2p_data *p2p = eloop_ctx;
4907
4908         p2p_dbg(p2p,
4909                 "Timeout on waiting peer to become ready for GO Negotiation");
4910         p2p_go_neg_failed(p2p, -1);
4911 }