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