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         int freqs;
1643         size_t i, j;
1644
1645         p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1646                 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1647
1648         os_memset(&res, 0, sizeof(res));
1649         res.role_go = go;
1650         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1651         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1652         res.wps_method = peer->wps_method;
1653         if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1654                 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1655                         res.persistent_group = 2;
1656                 else
1657                         res.persistent_group = 1;
1658         }
1659
1660         if (go) {
1661                 /* Setup AP mode for WPS provisioning */
1662                 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1663                                                p2p->op_channel);
1664                 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1665                 res.ssid_len = p2p->ssid_len;
1666                 p2p_random(res.passphrase, p2p->cfg->passphrase_len);
1667         } else {
1668                 res.freq = peer->oper_freq;
1669                 if (p2p->ssid_len) {
1670                         os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1671                         res.ssid_len = p2p->ssid_len;
1672                 }
1673         }
1674
1675         p2p_channels_dump(p2p, "own channels", &p2p->channels);
1676         p2p_channels_dump(p2p, "peer channels", &peer->channels);
1677         p2p_channels_intersect(&p2p->channels, &peer->channels,
1678                                &intersection);
1679         if (go) {
1680                 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1681                 p2p_channels_dump(p2p, "intersection after no-GO removal",
1682                                   &intersection);
1683         }
1684         freqs = 0;
1685         for (i = 0; i < intersection.reg_classes; i++) {
1686                 struct p2p_reg_class *c = &intersection.reg_class[i];
1687                 if (freqs + 1 == P2P_MAX_CHANNELS)
1688                         break;
1689                 for (j = 0; j < c->channels; j++) {
1690                         int freq;
1691                         if (freqs + 1 == P2P_MAX_CHANNELS)
1692                                 break;
1693                         freq = p2p_channel_to_freq(c->reg_class, c->channel[j]);
1694                         if (freq < 0)
1695                                 continue;
1696                         res.freq_list[freqs++] = freq;
1697                 }
1698         }
1699
1700         res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1701
1702         p2p_clear_timeout(p2p);
1703         p2p->ssid_set = 0;
1704         peer->go_neg_req_sent = 0;
1705         peer->wps_method = WPS_NOT_READY;
1706         peer->oob_pw_id = 0;
1707         wpabuf_free(peer->go_neg_conf);
1708         peer->go_neg_conf = NULL;
1709
1710         p2p_set_state(p2p, P2P_PROVISIONING);
1711         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1712 }
1713
1714
1715 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1716                               const u8 *data, size_t len, int rx_freq)
1717 {
1718         p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1719         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1720
1721         if (len < 1)
1722                 return;
1723
1724         switch (data[0]) {
1725         case P2P_GO_NEG_REQ:
1726                 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1727                 break;
1728         case P2P_GO_NEG_RESP:
1729                 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1730                 break;
1731         case P2P_GO_NEG_CONF:
1732                 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1733                 break;
1734         case P2P_INVITATION_REQ:
1735                 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1736                                            rx_freq);
1737                 break;
1738         case P2P_INVITATION_RESP:
1739                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
1740                 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1741                 break;
1742         case P2P_PROV_DISC_REQ:
1743                 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1744                 break;
1745         case P2P_PROV_DISC_RESP:
1746                 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1747                 break;
1748         case P2P_DEV_DISC_REQ:
1749                 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1750                 break;
1751         case P2P_DEV_DISC_RESP:
1752                 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1753                 break;
1754         default:
1755                 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1756                         data[0]);
1757                 break;
1758         }
1759 }
1760
1761
1762 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1763                                  const u8 *sa, const u8 *bssid, const u8 *data,
1764                                  size_t len, int freq)
1765 {
1766         if (len < 1)
1767                 return;
1768
1769         switch (data[0]) {
1770         case WLAN_PA_VENDOR_SPECIFIC:
1771                 data++;
1772                 len--;
1773                 if (len < 4)
1774                         return;
1775                 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1776                         return;
1777
1778                 data += 4;
1779                 len -= 4;
1780
1781                 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1782                 break;
1783         case WLAN_PA_GAS_INITIAL_REQ:
1784                 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1785                 break;
1786         case WLAN_PA_GAS_INITIAL_RESP:
1787                 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1788                 break;
1789         case WLAN_PA_GAS_COMEBACK_REQ:
1790                 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1791                 break;
1792         case WLAN_PA_GAS_COMEBACK_RESP:
1793                 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1794                 break;
1795         }
1796 }
1797
1798
1799 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1800                    const u8 *bssid, u8 category,
1801                    const u8 *data, size_t len, int freq)
1802 {
1803         if (category == WLAN_ACTION_PUBLIC) {
1804                 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1805                 return;
1806         }
1807
1808         if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1809                 return;
1810
1811         if (len < 4)
1812                 return;
1813
1814         if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1815                 return;
1816         data += 4;
1817         len -= 4;
1818
1819         /* P2P action frame */
1820         p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1821         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1822
1823         if (len < 1)
1824                 return;
1825         switch (data[0]) {
1826         case P2P_NOA:
1827                 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1828                 /* TODO */
1829                 break;
1830         case P2P_PRESENCE_REQ:
1831                 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1832                 break;
1833         case P2P_PRESENCE_RESP:
1834                 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1835                 break;
1836         case P2P_GO_DISC_REQ:
1837                 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1838                 break;
1839         default:
1840                 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1841                 break;
1842         }
1843 }
1844
1845
1846 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1847 {
1848         struct p2p_data *p2p = eloop_ctx;
1849         if (p2p->go_neg_peer == NULL)
1850                 return;
1851         if (p2p->pending_listen_freq) {
1852                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start");
1853                 p2p->pending_listen_freq = 0;
1854         }
1855         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1856         p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1857         /*
1858          * Set new timeout to make sure a previously set one does not expire
1859          * too quickly while waiting for the GO Negotiation to complete.
1860          */
1861         p2p_set_timeout(p2p, 0, 500000);
1862         p2p_connect_send(p2p, p2p->go_neg_peer);
1863 }
1864
1865
1866 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1867 {
1868         struct p2p_data *p2p = eloop_ctx;
1869         if (p2p->invite_peer == NULL)
1870                 return;
1871         if (p2p->pending_listen_freq) {
1872                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start");
1873                 p2p->pending_listen_freq = 0;
1874         }
1875         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1876         p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
1877                         p2p->invite_dev_pw_id);
1878 }
1879
1880
1881 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1882                                        const u8 *ie, size_t ie_len)
1883 {
1884         struct p2p_message msg;
1885         struct p2p_device *dev;
1886
1887         os_memset(&msg, 0, sizeof(msg));
1888         if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1889         {
1890                 p2p_parse_free(&msg);
1891                 return; /* not a P2P probe */
1892         }
1893
1894         if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
1895             os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
1896             != 0) {
1897                 /* The Probe Request is not part of P2P Device Discovery. It is
1898                  * not known whether the source address of the frame is the P2P
1899                  * Device Address or P2P Interface Address. Do not add a new
1900                  * peer entry based on this frames.
1901                  */
1902                 p2p_parse_free(&msg);
1903                 return;
1904         }
1905
1906         dev = p2p_get_device(p2p, addr);
1907         if (dev) {
1908                 if (dev->country[0] == 0 && msg.listen_channel)
1909                         os_memcpy(dev->country, msg.listen_channel, 3);
1910                 os_get_reltime(&dev->last_seen);
1911                 p2p_parse_free(&msg);
1912                 return; /* already known */
1913         }
1914
1915         dev = p2p_create_device(p2p, addr);
1916         if (dev == NULL) {
1917                 p2p_parse_free(&msg);
1918                 return;
1919         }
1920
1921         os_get_reltime(&dev->last_seen);
1922         dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
1923
1924         if (msg.listen_channel) {
1925                 os_memcpy(dev->country, msg.listen_channel, 3);
1926                 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
1927                                                        msg.listen_channel[4]);
1928         }
1929
1930         p2p_copy_wps_info(p2p, dev, 1, &msg);
1931
1932         if (msg.wfd_subelems) {
1933                 wpabuf_free(dev->info.wfd_subelems);
1934                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
1935         }
1936
1937         p2p_parse_free(&msg);
1938
1939         p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
1940                 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
1941                 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
1942                 dev->info.group_capab, dev->info.device_name,
1943                 dev->listen_freq);
1944 }
1945
1946
1947 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
1948                                                 const u8 *addr,
1949                                                 struct p2p_message *msg)
1950 {
1951         struct p2p_device *dev;
1952
1953         dev = p2p_get_device(p2p, addr);
1954         if (dev) {
1955                 os_get_reltime(&dev->last_seen);
1956                 return dev; /* already known */
1957         }
1958
1959         dev = p2p_create_device(p2p, addr);
1960         if (dev == NULL)
1961                 return NULL;
1962
1963         p2p_add_dev_info(p2p, addr, dev, msg);
1964
1965         return dev;
1966 }
1967
1968
1969 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
1970 {
1971         if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
1972                 return 1;
1973         if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
1974             WPA_GET_BE32(&req_dev_type[2]) == 0 &&
1975             WPA_GET_BE16(&req_dev_type[6]) == 0)
1976                 return 1; /* Category match with wildcard OUI/sub-category */
1977         return 0;
1978 }
1979
1980
1981 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
1982                         size_t num_req_dev_type)
1983 {
1984         size_t i;
1985         for (i = 0; i < num_req_dev_type; i++) {
1986                 if (dev_type_match(dev_type, req_dev_type[i]))
1987                         return 1;
1988         }
1989         return 0;
1990 }
1991
1992
1993 /**
1994  * p2p_match_dev_type - Match local device type with requested type
1995  * @p2p: P2P module context from p2p_init()
1996  * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
1997  * Returns: 1 on match, 0 on mismatch
1998  *
1999  * This function can be used to match the Requested Device Type attribute in
2000  * WPS IE with the local device types for deciding whether to reply to a Probe
2001  * Request frame.
2002  */
2003 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
2004 {
2005         struct wps_parse_attr attr;
2006         size_t i;
2007
2008         if (wps_parse_msg(wps, &attr))
2009                 return 1; /* assume no Requested Device Type attributes */
2010
2011         if (attr.num_req_dev_type == 0)
2012                 return 1; /* no Requested Device Type attributes -> match */
2013
2014         if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
2015                                 attr.num_req_dev_type))
2016                 return 1; /* Own Primary Device Type matches */
2017
2018         for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) {
2019                 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
2020                                         attr.req_dev_type,
2021                                         attr.num_req_dev_type))
2022                         return 1; /* Own Secondary Device Type matches */
2023         }
2024
2025         /* No matching device type found */
2026         return 0;
2027 }
2028
2029
2030 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
2031 {
2032         struct wpabuf *buf;
2033         u8 *len;
2034         int pw_id = -1;
2035         size_t extra = 0;
2036
2037 #ifdef CONFIG_WIFI_DISPLAY
2038         if (p2p->wfd_ie_probe_resp)
2039                 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
2040 #endif /* CONFIG_WIFI_DISPLAY */
2041
2042         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2043                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2044
2045         buf = wpabuf_alloc(1000 + extra);
2046         if (buf == NULL)
2047                 return NULL;
2048
2049         if (p2p->go_neg_peer) {
2050                 /* Advertise immediate availability of WPS credential */
2051                 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
2052         }
2053
2054         if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
2055                 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
2056                 wpabuf_free(buf);
2057                 return NULL;
2058         }
2059
2060 #ifdef CONFIG_WIFI_DISPLAY
2061         if (p2p->wfd_ie_probe_resp)
2062                 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
2063 #endif /* CONFIG_WIFI_DISPLAY */
2064
2065         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2066                 wpabuf_put_buf(buf,
2067                                p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2068
2069         /* P2P IE */
2070         len = p2p_buf_add_ie_hdr(buf);
2071         p2p_buf_add_capability(buf, p2p->dev_capab &
2072                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2073         if (p2p->ext_listen_interval)
2074                 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
2075                                               p2p->ext_listen_interval);
2076         p2p_buf_add_device_info(buf, p2p, NULL);
2077         p2p_buf_update_ie_hdr(buf, len);
2078
2079         return buf;
2080 }
2081
2082
2083 static enum p2p_probe_req_status
2084 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2085                 const u8 *bssid, const u8 *ie, size_t ie_len)
2086 {
2087         struct ieee802_11_elems elems;
2088         struct wpabuf *buf;
2089         struct ieee80211_mgmt *resp;
2090         struct p2p_message msg;
2091         struct wpabuf *ies;
2092
2093         if (!p2p->in_listen || !p2p->drv_in_listen) {
2094                 /* not in Listen state - ignore Probe Request */
2095                 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
2096                         p2p->in_listen, p2p->drv_in_listen);
2097                 return P2P_PREQ_NOT_LISTEN;
2098         }
2099
2100         if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
2101             ParseFailed) {
2102                 /* Ignore invalid Probe Request frames */
2103                 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
2104                 return P2P_PREQ_MALFORMED;
2105         }
2106
2107         if (elems.p2p == NULL) {
2108                 /* not a P2P probe - ignore it */
2109                 p2p_dbg(p2p, "Not a P2P probe - ignore it");
2110                 return P2P_PREQ_NOT_P2P;
2111         }
2112
2113         if (dst && !is_broadcast_ether_addr(dst) &&
2114             os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2115                 /* Not sent to the broadcast address or our P2P Device Address
2116                  */
2117                 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2118                         MAC2STR(dst));
2119                 return P2P_PREQ_NOT_PROCESSED;
2120         }
2121
2122         if (bssid && !is_broadcast_ether_addr(bssid)) {
2123                 /* Not sent to the Wildcard BSSID */
2124                 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2125                         MAC2STR(bssid));
2126                 return P2P_PREQ_NOT_PROCESSED;
2127         }
2128
2129         if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2130             os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2131             0) {
2132                 /* not using P2P Wildcard SSID - ignore */
2133                 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2134                 return P2P_PREQ_NOT_PROCESSED;
2135         }
2136
2137         if (supp_rates_11b_only(&elems)) {
2138                 /* Indicates support for 11b rates only */
2139                 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2140                 return P2P_PREQ_NOT_P2P;
2141         }
2142
2143         os_memset(&msg, 0, sizeof(msg));
2144         if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2145                 /* Could not parse P2P attributes */
2146                 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2147                 return P2P_PREQ_NOT_P2P;
2148         }
2149
2150         if (msg.device_id &&
2151             os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2152                 /* Device ID did not match */
2153                 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2154                         MAC2STR(msg.device_id));
2155                 p2p_parse_free(&msg);
2156                 return P2P_PREQ_NOT_PROCESSED;
2157         }
2158
2159         /* Check Requested Device Type match */
2160         if (msg.wps_attributes &&
2161             !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2162                 /* No match with Requested Device Type */
2163                 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2164                 p2p_parse_free(&msg);
2165                 return P2P_PREQ_NOT_PROCESSED;
2166         }
2167         p2p_parse_free(&msg);
2168
2169         if (!p2p->cfg->send_probe_resp) {
2170                 /* Response generated elsewhere */
2171                 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2172                 return P2P_PREQ_NOT_PROCESSED;
2173         }
2174
2175         p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2176
2177         /*
2178          * We do not really have a specific BSS that this frame is advertising,
2179          * so build a frame that has some information in valid format. This is
2180          * really only used for discovery purposes, not to learn exact BSS
2181          * parameters.
2182          */
2183         ies = p2p_build_probe_resp_ies(p2p);
2184         if (ies == NULL)
2185                 return P2P_PREQ_NOT_PROCESSED;
2186
2187         buf = wpabuf_alloc(200 + wpabuf_len(ies));
2188         if (buf == NULL) {
2189                 wpabuf_free(ies);
2190                 return P2P_PREQ_NOT_PROCESSED;
2191         }
2192
2193         resp = NULL;
2194         resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
2195
2196         resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2197                                            (WLAN_FC_STYPE_PROBE_RESP << 4));
2198         os_memcpy(resp->da, addr, ETH_ALEN);
2199         os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2200         os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2201         resp->u.probe_resp.beacon_int = host_to_le16(100);
2202         /* hardware or low-level driver will setup seq_ctrl and timestamp */
2203         resp->u.probe_resp.capab_info =
2204                 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2205                              WLAN_CAPABILITY_PRIVACY |
2206                              WLAN_CAPABILITY_SHORT_SLOT_TIME);
2207
2208         wpabuf_put_u8(buf, WLAN_EID_SSID);
2209         wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2210         wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2211
2212         wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2213         wpabuf_put_u8(buf, 8);
2214         wpabuf_put_u8(buf, (60 / 5) | 0x80);
2215         wpabuf_put_u8(buf, 90 / 5);
2216         wpabuf_put_u8(buf, (120 / 5) | 0x80);
2217         wpabuf_put_u8(buf, 180 / 5);
2218         wpabuf_put_u8(buf, (240 / 5) | 0x80);
2219         wpabuf_put_u8(buf, 360 / 5);
2220         wpabuf_put_u8(buf, 480 / 5);
2221         wpabuf_put_u8(buf, 540 / 5);
2222
2223         wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2224         wpabuf_put_u8(buf, 1);
2225         wpabuf_put_u8(buf, p2p->cfg->channel);
2226
2227         wpabuf_put_buf(buf, ies);
2228         wpabuf_free(ies);
2229
2230         p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
2231
2232         wpabuf_free(buf);
2233
2234         return P2P_PREQ_NOT_PROCESSED;
2235 }
2236
2237
2238 enum p2p_probe_req_status
2239 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2240                  const u8 *bssid, const u8 *ie, size_t ie_len)
2241 {
2242         enum p2p_probe_req_status res;
2243
2244         p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2245
2246         res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
2247
2248         if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2249             p2p->go_neg_peer &&
2250             os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2251             == 0 &&
2252             !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2253                 /* Received a Probe Request from GO Negotiation peer */
2254                 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2255                 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2256                 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2257                 return P2P_PREQ_PROCESSED;
2258         }
2259
2260         if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2261             p2p->invite_peer &&
2262             (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2263             os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2264             == 0) {
2265                 /* Received a Probe Request from Invite peer */
2266                 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2267                 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2268                 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2269                 return P2P_PREQ_PROCESSED;
2270         }
2271
2272         return res;
2273 }
2274
2275
2276 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2277                                     u8 *buf, size_t len, struct wpabuf *p2p_ie)
2278 {
2279         struct wpabuf *tmp;
2280         u8 *lpos;
2281         size_t tmplen;
2282         int res;
2283         u8 group_capab;
2284
2285         if (p2p_ie == NULL)
2286                 return 0; /* WLAN AP is not a P2P manager */
2287
2288         /*
2289          * (Re)Association Request - P2P IE
2290          * P2P Capability attribute (shall be present)
2291          * P2P Interface attribute (present if concurrent device and
2292          *      P2P Management is enabled)
2293          */
2294         tmp = wpabuf_alloc(200);
2295         if (tmp == NULL)
2296                 return -1;
2297
2298         lpos = p2p_buf_add_ie_hdr(tmp);
2299         group_capab = 0;
2300         if (p2p->num_groups > 0) {
2301                 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2302                 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2303                     (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2304                     p2p->cross_connect)
2305                         group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2306         }
2307         p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2308         if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2309             (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2310                 p2p_buf_add_p2p_interface(tmp, p2p);
2311         p2p_buf_update_ie_hdr(tmp, lpos);
2312
2313         tmplen = wpabuf_len(tmp);
2314         if (tmplen > len)
2315                 res = -1;
2316         else {
2317                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2318                 res = tmplen;
2319         }
2320         wpabuf_free(tmp);
2321
2322         return res;
2323 }
2324
2325
2326 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2327                      size_t len, int p2p_group, struct wpabuf *p2p_ie)
2328 {
2329         struct wpabuf *tmp;
2330         u8 *lpos;
2331         struct p2p_device *peer;
2332         size_t tmplen;
2333         int res;
2334         size_t extra = 0;
2335
2336         if (!p2p_group)
2337                 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2338
2339 #ifdef CONFIG_WIFI_DISPLAY
2340         if (p2p->wfd_ie_assoc_req)
2341                 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2342 #endif /* CONFIG_WIFI_DISPLAY */
2343
2344         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2345                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2346
2347         /*
2348          * (Re)Association Request - P2P IE
2349          * P2P Capability attribute (shall be present)
2350          * Extended Listen Timing (may be present)
2351          * P2P Device Info attribute (shall be present)
2352          */
2353         tmp = wpabuf_alloc(200 + extra);
2354         if (tmp == NULL)
2355                 return -1;
2356
2357 #ifdef CONFIG_WIFI_DISPLAY
2358         if (p2p->wfd_ie_assoc_req)
2359                 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2360 #endif /* CONFIG_WIFI_DISPLAY */
2361
2362         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2363                 wpabuf_put_buf(tmp,
2364                                p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2365
2366         peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2367
2368         lpos = p2p_buf_add_ie_hdr(tmp);
2369         p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2370         if (p2p->ext_listen_interval)
2371                 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2372                                               p2p->ext_listen_interval);
2373         p2p_buf_add_device_info(tmp, p2p, peer);
2374         p2p_buf_update_ie_hdr(tmp, lpos);
2375
2376         tmplen = wpabuf_len(tmp);
2377         if (tmplen > len)
2378                 res = -1;
2379         else {
2380                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2381                 res = tmplen;
2382         }
2383         wpabuf_free(tmp);
2384
2385         return res;
2386 }
2387
2388
2389 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2390 {
2391         struct wpabuf *p2p_ie;
2392         int ret;
2393
2394         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2395         if (p2p_ie == NULL)
2396                 return 0;
2397
2398         ret = p2p_attr_text(p2p_ie, buf, end);
2399         wpabuf_free(p2p_ie);
2400         return ret;
2401 }
2402
2403
2404 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2405 {
2406         struct p2p_message msg;
2407
2408         os_memset(&msg, 0, sizeof(msg));
2409         if (p2p_parse_p2p_ie(p2p_ie, &msg))
2410                 return -1;
2411
2412         if (msg.p2p_device_addr) {
2413                 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2414                 return 0;
2415         } else if (msg.device_id) {
2416                 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2417                 return 0;
2418         }
2419         return -1;
2420 }
2421
2422
2423 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2424 {
2425         struct wpabuf *p2p_ie;
2426         int ret;
2427
2428         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2429                                              P2P_IE_VENDOR_TYPE);
2430         if (p2p_ie == NULL)
2431                 return -1;
2432         ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2433         wpabuf_free(p2p_ie);
2434         return ret;
2435 }
2436
2437
2438 static void p2p_clear_go_neg(struct p2p_data *p2p)
2439 {
2440         p2p->go_neg_peer = NULL;
2441         p2p_clear_timeout(p2p);
2442         p2p_set_state(p2p, P2P_IDLE);
2443 }
2444
2445
2446 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2447 {
2448         if (p2p->go_neg_peer == NULL) {
2449                 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2450                 return; /* No pending Group Formation */
2451         }
2452
2453         if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2454             0) {
2455                 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2456                         MACSTR " (GO Negotiation peer " MACSTR ")",
2457                         MAC2STR(mac_addr),
2458                         MAC2STR(p2p->go_neg_peer->intended_addr));
2459                 return; /* Ignore unexpected peer address */
2460         }
2461
2462         p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2463                 MAC2STR(mac_addr));
2464
2465         p2p_clear_go_neg(p2p);
2466 }
2467
2468
2469 void p2p_group_formation_failed(struct p2p_data *p2p)
2470 {
2471         if (p2p->go_neg_peer == NULL) {
2472                 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2473                 return; /* No pending Group Formation */
2474         }
2475
2476         p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2477                 MAC2STR(p2p->go_neg_peer->intended_addr));
2478
2479         p2p_clear_go_neg(p2p);
2480 }
2481
2482
2483 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2484 {
2485         struct p2p_data *p2p;
2486
2487         if (cfg->max_peers < 1 ||
2488             cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
2489                 return NULL;
2490
2491         p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2492         if (p2p == NULL)
2493                 return NULL;
2494         p2p->cfg = (struct p2p_config *) (p2p + 1);
2495         os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2496         if (cfg->dev_name)
2497                 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2498         if (cfg->manufacturer)
2499                 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2500         if (cfg->model_name)
2501                 p2p->cfg->model_name = os_strdup(cfg->model_name);
2502         if (cfg->model_number)
2503                 p2p->cfg->model_number = os_strdup(cfg->model_number);
2504         if (cfg->serial_number)
2505                 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2506         if (cfg->pref_chan) {
2507                 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2508                                                 sizeof(struct p2p_channel));
2509                 if (p2p->cfg->pref_chan) {
2510                         os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2511                                   cfg->num_pref_chan *
2512                                   sizeof(struct p2p_channel));
2513                 } else
2514                         p2p->cfg->num_pref_chan = 0;
2515         }
2516
2517         p2p->min_disc_int = 1;
2518         p2p->max_disc_int = 3;
2519         p2p->max_disc_tu = -1;
2520
2521         if (os_get_random(&p2p->next_tie_breaker, 1) < 0)
2522                 p2p->next_tie_breaker = 0;
2523         p2p->next_tie_breaker &= 0x01;
2524         if (cfg->sd_request)
2525                 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2526         p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2527         if (cfg->concurrent_operations)
2528                 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2529         p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2530
2531         dl_list_init(&p2p->devices);
2532
2533         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2534                                p2p_expiration_timeout, p2p, NULL);
2535
2536         p2p->go_timeout = 100;
2537         p2p->client_timeout = 20;
2538         p2p->num_p2p_sd_queries = 0;
2539
2540         p2p_dbg(p2p, "initialized");
2541         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2542         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2543
2544         return p2p;
2545 }
2546
2547
2548 void p2p_deinit(struct p2p_data *p2p)
2549 {
2550 #ifdef CONFIG_WIFI_DISPLAY
2551         wpabuf_free(p2p->wfd_ie_beacon);
2552         wpabuf_free(p2p->wfd_ie_probe_req);
2553         wpabuf_free(p2p->wfd_ie_probe_resp);
2554         wpabuf_free(p2p->wfd_ie_assoc_req);
2555         wpabuf_free(p2p->wfd_ie_invitation);
2556         wpabuf_free(p2p->wfd_ie_prov_disc_req);
2557         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2558         wpabuf_free(p2p->wfd_ie_go_neg);
2559         wpabuf_free(p2p->wfd_dev_info);
2560         wpabuf_free(p2p->wfd_assoc_bssid);
2561         wpabuf_free(p2p->wfd_coupled_sink_info);
2562 #endif /* CONFIG_WIFI_DISPLAY */
2563
2564         eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2565         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2566         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2567         eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2568         p2p_flush(p2p);
2569         p2p_free_req_dev_types(p2p);
2570         os_free(p2p->cfg->dev_name);
2571         os_free(p2p->cfg->manufacturer);
2572         os_free(p2p->cfg->model_name);
2573         os_free(p2p->cfg->model_number);
2574         os_free(p2p->cfg->serial_number);
2575         os_free(p2p->cfg->pref_chan);
2576         os_free(p2p->groups);
2577         wpabuf_free(p2p->sd_resp);
2578         os_free(p2p->after_scan_tx);
2579         p2p_remove_wps_vendor_extensions(p2p);
2580         os_free(p2p->no_go_freq.range);
2581         os_free(p2p);
2582 }
2583
2584
2585 void p2p_flush(struct p2p_data *p2p)
2586 {
2587         struct p2p_device *dev, *prev;
2588         p2p_stop_find(p2p);
2589         dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2590                               list) {
2591                 dl_list_del(&dev->list);
2592                 p2p_device_free(p2p, dev);
2593         }
2594         p2p_free_sd_queries(p2p);
2595         os_free(p2p->after_scan_tx);
2596         p2p->after_scan_tx = NULL;
2597 }
2598
2599
2600 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2601 {
2602         struct p2p_device *dev;
2603
2604         dev = p2p_get_device(p2p, addr);
2605         if (dev == NULL)
2606                 return -1;
2607
2608         p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
2609
2610         if (p2p->go_neg_peer == dev)
2611                 p2p->go_neg_peer = NULL;
2612
2613         dev->wps_method = WPS_NOT_READY;
2614         dev->oob_pw_id = 0;
2615         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
2616         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
2617
2618         /* Check if after_scan_tx is for this peer. If so free it */
2619         if (p2p->after_scan_tx &&
2620             os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
2621                 os_free(p2p->after_scan_tx);
2622                 p2p->after_scan_tx = NULL;
2623         }
2624
2625         return 0;
2626 }
2627
2628
2629 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
2630 {
2631         os_free(p2p->cfg->dev_name);
2632         if (dev_name) {
2633                 p2p->cfg->dev_name = os_strdup(dev_name);
2634                 if (p2p->cfg->dev_name == NULL)
2635                         return -1;
2636         } else
2637                 p2p->cfg->dev_name = NULL;
2638         return 0;
2639 }
2640
2641
2642 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
2643 {
2644         os_free(p2p->cfg->manufacturer);
2645         p2p->cfg->manufacturer = NULL;
2646         if (manufacturer) {
2647                 p2p->cfg->manufacturer = os_strdup(manufacturer);
2648                 if (p2p->cfg->manufacturer == NULL)
2649                         return -1;
2650         }
2651
2652         return 0;
2653 }
2654
2655
2656 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
2657 {
2658         os_free(p2p->cfg->model_name);
2659         p2p->cfg->model_name = NULL;
2660         if (model_name) {
2661                 p2p->cfg->model_name = os_strdup(model_name);
2662                 if (p2p->cfg->model_name == NULL)
2663                         return -1;
2664         }
2665
2666         return 0;
2667 }
2668
2669
2670 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
2671 {
2672         os_free(p2p->cfg->model_number);
2673         p2p->cfg->model_number = NULL;
2674         if (model_number) {
2675                 p2p->cfg->model_number = os_strdup(model_number);
2676                 if (p2p->cfg->model_number == NULL)
2677                         return -1;
2678         }
2679
2680         return 0;
2681 }
2682
2683
2684 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
2685 {
2686         os_free(p2p->cfg->serial_number);
2687         p2p->cfg->serial_number = NULL;
2688         if (serial_number) {
2689                 p2p->cfg->serial_number = os_strdup(serial_number);
2690                 if (p2p->cfg->serial_number == NULL)
2691                         return -1;
2692         }
2693
2694         return 0;
2695 }
2696
2697
2698 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
2699 {
2700         p2p->cfg->config_methods = config_methods;
2701 }
2702
2703
2704 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
2705 {
2706         os_memcpy(p2p->cfg->uuid, uuid, 16);
2707 }
2708
2709
2710 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
2711 {
2712         os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
2713         return 0;
2714 }
2715
2716
2717 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
2718                           size_t num_dev_types)
2719 {
2720         if (num_dev_types > P2P_SEC_DEVICE_TYPES)
2721                 num_dev_types = P2P_SEC_DEVICE_TYPES;
2722         p2p->cfg->num_sec_dev_types = num_dev_types;
2723         os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
2724         return 0;
2725 }
2726
2727
2728 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
2729 {
2730         int i;
2731
2732         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2733                 wpabuf_free(p2p->wps_vendor_ext[i]);
2734                 p2p->wps_vendor_ext[i] = NULL;
2735         }
2736 }
2737
2738
2739 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
2740                                  const struct wpabuf *vendor_ext)
2741 {
2742         int i;
2743
2744         if (vendor_ext == NULL)
2745                 return -1;
2746
2747         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2748                 if (p2p->wps_vendor_ext[i] == NULL)
2749                         break;
2750         }
2751         if (i >= P2P_MAX_WPS_VENDOR_EXT)
2752                 return -1;
2753
2754         p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
2755         if (p2p->wps_vendor_ext[i] == NULL)
2756                 return -1;
2757
2758         return 0;
2759 }
2760
2761
2762 int p2p_set_country(struct p2p_data *p2p, const char *country)
2763 {
2764         os_memcpy(p2p->cfg->country, country, 3);
2765         return 0;
2766 }
2767
2768
2769 static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev)
2770 {
2771         if (dev->sd_pending_bcast_queries == 0) {
2772                 /* Initialize with total number of registered broadcast
2773                  * SD queries. */
2774                 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
2775         }
2776
2777         if (p2p_start_sd(p2p, dev) == 0)
2778                 return 1;
2779
2780         if (dev->req_config_methods &&
2781             !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
2782                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2783                         MACSTR " (config methods 0x%x)",
2784                         MAC2STR(dev->info.p2p_device_addr),
2785                         dev->req_config_methods);
2786                 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
2787                         return 1;
2788         }
2789
2790         return 0;
2791 }
2792
2793
2794 void p2p_continue_find(struct p2p_data *p2p)
2795 {
2796         struct p2p_device *dev;
2797         int found;
2798
2799         p2p_set_state(p2p, P2P_SEARCH);
2800
2801         /* Continue from the device following the last iteration */
2802         found = 0;
2803         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2804                 if (dev == p2p->last_p2p_find_oper) {
2805                         found = 1;
2806                         continue;
2807                 }
2808                 if (!found)
2809                         continue;
2810                 if (p2p_pre_find_operation(p2p, dev) > 0) {
2811                         p2p->last_p2p_find_oper = dev;
2812                         return;
2813                 }
2814         }
2815
2816         /*
2817          * Wrap around to the beginning of the list and continue until the last
2818          * iteration device.
2819          */
2820         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2821                 if (p2p_pre_find_operation(p2p, dev) > 0) {
2822                         p2p->last_p2p_find_oper = dev;
2823                         return;
2824                 }
2825                 if (dev == p2p->last_p2p_find_oper)
2826                         break;
2827         }
2828
2829         p2p_listen_in_find(p2p, 1);
2830 }
2831
2832
2833 static void p2p_sd_cb(struct p2p_data *p2p, int success)
2834 {
2835         p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
2836                 success);
2837         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2838
2839         if (!success) {
2840                 p2p->sd_peer = NULL;
2841                 p2p_continue_find(p2p);
2842                 return;
2843         }
2844
2845         if (p2p->sd_peer == NULL) {
2846                 p2p_dbg(p2p, "No SD peer entry known");
2847                 p2p_continue_find(p2p);
2848                 return;
2849         }
2850
2851         if (p2p->sd_query->for_all_peers) {
2852                 /* Update the pending broadcast SD query count for this device
2853                  */
2854                 p2p->sd_peer->sd_pending_bcast_queries--;
2855
2856                 /*
2857                  * If there are no pending broadcast queries for this device,
2858                  * mark it as done (-1).
2859                  */
2860                 if (p2p->sd_peer->sd_pending_bcast_queries == 0)
2861                         p2p->sd_peer->sd_pending_bcast_queries = -1;
2862         }
2863
2864         /* Wait for response from the peer */
2865         p2p_set_state(p2p, P2P_SD_DURING_FIND);
2866         p2p_set_timeout(p2p, 0, 200000);
2867 }
2868
2869
2870 /**
2871  * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
2872  * @p2p: P2P module context from p2p_init()
2873  */
2874 static void p2p_retry_pd(struct p2p_data *p2p)
2875 {
2876         struct p2p_device *dev;
2877
2878         if (p2p->state != P2P_IDLE)
2879                 return;
2880
2881         /*
2882          * Retry the prov disc req attempt only for the peer that the user had
2883          * requested.
2884          */
2885
2886         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2887                 if (os_memcmp(p2p->pending_pd_devaddr,
2888                               dev->info.p2p_device_addr, ETH_ALEN) != 0)
2889                         continue;
2890                 if (!dev->req_config_methods)
2891                         continue;
2892
2893                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2894                         MACSTR " (config methods 0x%x)",
2895                         MAC2STR(dev->info.p2p_device_addr),
2896                         dev->req_config_methods);
2897                 p2p_send_prov_disc_req(p2p, dev,
2898                                        dev->flags & P2P_DEV_PD_FOR_JOIN,
2899                                        p2p->pd_force_freq);
2900                 return;
2901         }
2902 }
2903
2904
2905 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
2906 {
2907         p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
2908                 success);
2909
2910         /*
2911          * Postpone resetting the pending action state till after we actually
2912          * time out. This allows us to take some action like notifying any
2913          * interested parties about no response to the request.
2914          *
2915          * When the timer (below) goes off we check in IDLE, SEARCH, or
2916          * LISTEN_ONLY state, which are the only allowed states to issue a PD
2917          * requests in, if this was still pending and then raise notification.
2918          */
2919
2920         if (!success) {
2921                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2922
2923                 if (p2p->user_initiated_pd &&
2924                     (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
2925                 {
2926                         /* Retry request from timeout to avoid busy loops */
2927                         p2p->pending_action_state = P2P_PENDING_PD;
2928                         p2p_set_timeout(p2p, 0, 50000);
2929                 } else if (p2p->state != P2P_IDLE)
2930                         p2p_continue_find(p2p);
2931                 else if (p2p->user_initiated_pd) {
2932                         p2p->pending_action_state = P2P_PENDING_PD;
2933                         p2p_set_timeout(p2p, 0, 300000);
2934                 }
2935                 return;
2936         }
2937
2938         /*
2939          * This postponing, of resetting pending_action_state, needs to be
2940          * done only for user initiated PD requests and not internal ones.
2941          */
2942         if (p2p->user_initiated_pd)
2943                 p2p->pending_action_state = P2P_PENDING_PD;
2944         else
2945                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2946
2947         /* Wait for response from the peer */
2948         if (p2p->state == P2P_SEARCH)
2949                 p2p_set_state(p2p, P2P_PD_DURING_FIND);
2950         p2p_set_timeout(p2p, 0, 200000);
2951 }
2952
2953
2954 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
2955                          struct os_reltime *rx_time, int level, const u8 *ies,
2956                          size_t ies_len)
2957 {
2958         if (os_reltime_before(rx_time, &p2p->find_start)) {
2959                 /*
2960                  * The driver may have cached (e.g., in cfg80211 BSS table) the
2961                  * scan results for relatively long time. To avoid reporting
2962                  * stale information, update P2P peers only based on results
2963                  * that have based on frames received after the last p2p_find
2964                  * operation was started.
2965                  */
2966                 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
2967                         " (rx_time=%u.%06u)",
2968                         MAC2STR(bssid), (unsigned int) rx_time->sec,
2969                         (unsigned int) rx_time->usec);
2970                 return 0;
2971         }
2972
2973         p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
2974
2975         return 0;
2976 }
2977
2978
2979 void p2p_scan_res_handled(struct p2p_data *p2p)
2980 {
2981         if (!p2p->p2p_scan_running) {
2982                 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
2983         }
2984         p2p->p2p_scan_running = 0;
2985         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2986
2987         if (p2p_run_after_scan(p2p))
2988                 return;
2989         if (p2p->state == P2P_SEARCH)
2990                 p2p_continue_find(p2p);
2991 }
2992
2993
2994 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
2995 {
2996         u8 *len;
2997
2998 #ifdef CONFIG_WIFI_DISPLAY
2999         if (p2p->wfd_ie_probe_req)
3000                 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
3001 #endif /* CONFIG_WIFI_DISPLAY */
3002
3003         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3004                 wpabuf_put_buf(ies,
3005                                p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3006
3007         len = p2p_buf_add_ie_hdr(ies);
3008         p2p_buf_add_capability(ies, p2p->dev_capab &
3009                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
3010         if (dev_id)
3011                 p2p_buf_add_device_id(ies, dev_id);
3012         if (p2p->cfg->reg_class && p2p->cfg->channel)
3013                 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
3014                                            p2p->cfg->reg_class,
3015                                            p2p->cfg->channel);
3016         if (p2p->ext_listen_interval)
3017                 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
3018                                               p2p->ext_listen_interval);
3019         /* TODO: p2p_buf_add_operating_channel() if GO */
3020         p2p_buf_update_ie_hdr(ies, len);
3021 }
3022
3023
3024 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
3025 {
3026         size_t len = 100;
3027
3028 #ifdef CONFIG_WIFI_DISPLAY
3029         if (p2p && p2p->wfd_ie_probe_req)
3030                 len += wpabuf_len(p2p->wfd_ie_probe_req);
3031 #endif /* CONFIG_WIFI_DISPLAY */
3032
3033         if (p2p && p2p->vendor_elem &&
3034             p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3035                 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3036
3037         return len;
3038 }
3039
3040
3041 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
3042 {
3043         return p2p_attr_text(p2p_ie, buf, end);
3044 }
3045
3046
3047 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
3048 {
3049         struct p2p_device *dev = p2p->go_neg_peer;
3050         int timeout;
3051
3052         p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
3053
3054         if (dev == NULL) {
3055                 p2p_dbg(p2p, "No pending GO Negotiation");
3056                 return;
3057         }
3058
3059         if (success) {
3060                 if (dev->flags & P2P_DEV_USER_REJECTED) {
3061                         p2p_set_state(p2p, P2P_IDLE);
3062                         return;
3063                 }
3064         } else if (dev->go_neg_req_sent) {
3065                 /* Cancel the increment from p2p_connect_send() on failure */
3066                 dev->go_neg_req_sent--;
3067         }
3068
3069         if (!success &&
3070             (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
3071             !is_zero_ether_addr(dev->member_in_go_dev)) {
3072                 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
3073                         MAC2STR(dev->info.p2p_device_addr));
3074                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3075                 p2p_send_dev_disc_req(p2p, dev);
3076                 return;
3077         }
3078
3079         /*
3080          * Use P2P find, if needed, to find the other device from its listen
3081          * channel.
3082          */
3083         p2p_set_state(p2p, P2P_CONNECT);
3084         timeout = success ? 500000 : 100000;
3085         if (!success && p2p->go_neg_peer &&
3086             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
3087                 unsigned int r;
3088                 /*
3089                  * Peer is expected to wait our response and we will skip the
3090                  * listen phase. Add some randomness to the wait time here to
3091                  * make it less likely to hit cases where we could end up in
3092                  * sync with peer not listening.
3093                  */
3094                 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
3095                         r = 0;
3096                 timeout += r % 100000;
3097         }
3098         p2p_set_timeout(p2p, 0, timeout);
3099 }
3100
3101
3102 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
3103 {
3104         p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
3105                 success);
3106         if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
3107                 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
3108                 return;
3109         }
3110         p2p_set_state(p2p, P2P_CONNECT);
3111         p2p_set_timeout(p2p, 0, 500000);
3112 }
3113
3114
3115 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
3116                                        const u8 *addr)
3117 {
3118         p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
3119         if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
3120                 p2p_go_neg_failed(p2p, p2p->go_neg_peer,
3121                                   p2p->go_neg_peer->status);
3122         } else if (success) {
3123                 struct p2p_device *dev;
3124                 dev = p2p_get_device(p2p, addr);
3125                 if (dev &&
3126                     dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
3127                         dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
3128         }
3129 }
3130
3131
3132 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
3133                                enum p2p_send_action_result result)
3134 {
3135         struct p2p_device *dev;
3136
3137         p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
3138         if (result == P2P_SEND_ACTION_FAILED) {
3139                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3140                 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3141                 return;
3142         }
3143
3144         dev = p2p->go_neg_peer;
3145
3146         if (result == P2P_SEND_ACTION_NO_ACK) {
3147                 /*
3148                  * Retry GO Negotiation Confirmation
3149                  * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
3150                  * ACK for confirmation.
3151                  */
3152                 if (dev && dev->go_neg_conf &&
3153                     dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
3154                         p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
3155                                 dev->go_neg_conf_sent);
3156                         p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
3157                         if (p2p_send_action(p2p, dev->go_neg_conf_freq,
3158                                             dev->info.p2p_device_addr,
3159                                             p2p->cfg->dev_addr,
3160                                             dev->info.p2p_device_addr,
3161                                             wpabuf_head(dev->go_neg_conf),
3162                                             wpabuf_len(dev->go_neg_conf), 0) >=
3163                             0) {
3164                                 dev->go_neg_conf_sent++;
3165                                 return;
3166                         }
3167                         p2p_dbg(p2p, "Failed to re-send Action frame");
3168
3169                         /*
3170                          * Continue with the assumption that the first attempt
3171                          * went through and just the ACK frame was lost.
3172                          */
3173                 }
3174
3175                 /*
3176                  * It looks like the TX status for GO Negotiation Confirm is
3177                  * often showing failure even when the peer has actually
3178                  * received the frame. Since the peer may change channels
3179                  * immediately after having received the frame, we may not see
3180                  * an Ack for retries, so just dropping a single frame may
3181                  * trigger this. To allow the group formation to succeed if the
3182                  * peer did indeed receive the frame, continue regardless of
3183                  * the TX status.
3184                  */
3185                 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
3186         }
3187
3188         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3189
3190         if (dev == NULL)
3191                 return;
3192
3193         p2p_go_complete(p2p, dev);
3194 }
3195
3196
3197 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3198                         const u8 *src, const u8 *bssid,
3199                         enum p2p_send_action_result result)
3200 {
3201         enum p2p_pending_action_state state;
3202         int success;
3203
3204         p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
3205                 " src=" MACSTR " bssid=" MACSTR " result=%d",
3206                 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
3207                 MAC2STR(bssid), result);
3208         success = result == P2P_SEND_ACTION_SUCCESS;
3209         state = p2p->pending_action_state;
3210         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3211         switch (state) {
3212         case P2P_NO_PENDING_ACTION:
3213                 if (p2p->send_action_in_progress) {
3214                         p2p->send_action_in_progress = 0;
3215                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3216                 }
3217                 if (p2p->after_scan_tx_in_progress) {
3218                         p2p->after_scan_tx_in_progress = 0;
3219                         if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
3220                             p2p_run_after_scan(p2p))
3221                                 break;
3222                         if (p2p->state == P2P_SEARCH) {
3223                                 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
3224                                 p2p_continue_find(p2p);
3225                         }
3226                 }
3227                 break;
3228         case P2P_PENDING_GO_NEG_REQUEST:
3229                 p2p_go_neg_req_cb(p2p, success);
3230                 break;
3231         case P2P_PENDING_GO_NEG_RESPONSE:
3232                 p2p_go_neg_resp_cb(p2p, success);
3233                 break;
3234         case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3235                 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3236                 break;
3237         case P2P_PENDING_GO_NEG_CONFIRM:
3238                 p2p_go_neg_conf_cb(p2p, result);
3239                 break;
3240         case P2P_PENDING_SD:
3241                 p2p_sd_cb(p2p, success);
3242                 break;
3243         case P2P_PENDING_PD:
3244                 p2p_prov_disc_cb(p2p, success);
3245                 break;
3246         case P2P_PENDING_INVITATION_REQUEST:
3247                 p2p_invitation_req_cb(p2p, success);
3248                 break;
3249         case P2P_PENDING_INVITATION_RESPONSE:
3250                 p2p_invitation_resp_cb(p2p, success);
3251                 break;
3252         case P2P_PENDING_DEV_DISC_REQUEST:
3253                 p2p_dev_disc_req_cb(p2p, success);
3254                 break;
3255         case P2P_PENDING_DEV_DISC_RESPONSE:
3256                 p2p_dev_disc_resp_cb(p2p, success);
3257                 break;
3258         case P2P_PENDING_GO_DISC_REQ:
3259                 p2p_go_disc_req_cb(p2p, success);
3260                 break;
3261         }
3262
3263         p2p->after_scan_tx_in_progress = 0;
3264 }
3265
3266
3267 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3268                    unsigned int duration)
3269 {
3270         if (freq == p2p->pending_client_disc_freq) {
3271                 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3272                 p2p->pending_client_disc_freq = 0;
3273                 return;
3274         }
3275
3276         if (freq != p2p->pending_listen_freq) {
3277                 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3278                         freq, duration, p2p->pending_listen_freq);
3279                 return;
3280         }
3281
3282         p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3283                 p2p->pending_listen_sec, p2p->pending_listen_usec,
3284                 p2p->pending_listen_freq);
3285         p2p->in_listen = 1;
3286         p2p->drv_in_listen = freq;
3287         if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3288                 /*
3289                  * Add 20 msec extra wait to avoid race condition with driver
3290                  * remain-on-channel end event, i.e., give driver more time to
3291                  * complete the operation before our timeout expires.
3292                  */
3293                 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3294                                 p2p->pending_listen_usec + 20000);
3295         }
3296
3297         p2p->pending_listen_freq = 0;
3298 }
3299
3300
3301 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3302 {
3303         p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3304         p2p->drv_in_listen = 0;
3305         if (p2p->in_listen)
3306                 return 0; /* Internal timeout will trigger the next step */
3307
3308         if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3309                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3310                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3311                         p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3312                         return 0;
3313                 }
3314
3315                 p2p_set_state(p2p, P2P_CONNECT);
3316                 p2p_connect_send(p2p, p2p->go_neg_peer);
3317                 return 1;
3318         } else if (p2p->state == P2P_SEARCH) {
3319                 if (p2p->p2p_scan_running) {
3320                          /*
3321                           * Search is already in progress. This can happen if
3322                           * an Action frame RX is reported immediately after
3323                           * the end of a remain-on-channel operation and the
3324                           * response frame to that is sent using an offchannel
3325                           * operation while in p2p_find. Avoid an attempt to
3326                           * restart a scan here.
3327                           */
3328                         p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3329                         return 1;
3330                 }
3331                 if (p2p->pending_listen_freq) {
3332                         /*
3333                          * Better wait a bit if the driver is unable to start
3334                          * offchannel operation for some reason. p2p_search()
3335                          * will be started from internal timeout.
3336                          */
3337                         p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3338                         p2p_set_timeout(p2p, 0, 100000);
3339                         return 1;
3340                 }
3341                 if (p2p->search_delay) {
3342                         p2p_dbg(p2p, "Delay search operation by %u ms",
3343                                 p2p->search_delay);
3344                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3345                                         (p2p->search_delay % 1000) * 1000);
3346                         return 1;
3347                 }
3348                 p2p_search(p2p);
3349                 return 1;
3350         }
3351
3352         return 0;
3353 }
3354
3355
3356 static void p2p_timeout_connect(struct p2p_data *p2p)
3357 {
3358         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3359         if (p2p->go_neg_peer &&
3360             (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3361                 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3362                 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3363                 return;
3364         }
3365         if (p2p->go_neg_peer &&
3366             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3367             p2p->go_neg_peer->connect_reqs < 120) {
3368                 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3369                 p2p_connect_send(p2p, p2p->go_neg_peer);
3370                 return;
3371         }
3372         if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3373                 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3374                 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3375                 p2p_set_timeout(p2p, 0, 30000);
3376                 return;
3377         }
3378         p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3379         p2p_listen_in_find(p2p, 0);
3380 }
3381
3382
3383 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3384 {
3385         if (p2p->go_neg_peer) {
3386                 if (p2p->drv_in_listen) {
3387                         p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3388                         return;
3389                 }
3390
3391                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3392                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3393                         p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3394                         return;
3395                 }
3396
3397                 p2p_set_state(p2p, P2P_CONNECT);
3398                 p2p_connect_send(p2p, p2p->go_neg_peer);
3399         } else
3400                 p2p_set_state(p2p, P2P_IDLE);
3401 }
3402
3403
3404 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3405 {
3406         p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3407
3408         if (p2p->cfg->is_concurrent_session_active &&
3409             p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3410                 p2p_set_timeout(p2p, 0, 500000);
3411         else
3412                 p2p_set_timeout(p2p, 0, 200000);
3413 }
3414
3415
3416 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3417 {
3418         struct p2p_device *dev = p2p->go_neg_peer;
3419         struct os_reltime now;
3420
3421         if (dev == NULL) {
3422                 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3423                 return;
3424         }
3425
3426         os_get_reltime(&now);
3427         if (os_reltime_expired(&now, &dev->go_neg_wait_started, 120)) {
3428                 p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation");
3429                 p2p_go_neg_failed(p2p, dev, -1);
3430                 return;
3431         }
3432
3433         p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3434         p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3435         p2p_listen_in_find(p2p, 0);
3436 }
3437
3438
3439 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3440 {
3441         p2p_dbg(p2p, "Service Discovery Query timeout");
3442         if (p2p->sd_peer) {
3443                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3444                 p2p->sd_peer = NULL;
3445         }
3446         p2p_continue_find(p2p);
3447 }
3448
3449
3450 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3451 {
3452         p2p_dbg(p2p, "Provision Discovery Request timeout");
3453         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3454         p2p_continue_find(p2p);
3455 }
3456
3457
3458 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3459 {
3460         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3461
3462         /*
3463          * For user initiated PD requests that we have not gotten any responses
3464          * for while in IDLE state, we retry them a couple of times before
3465          * giving up.
3466          */
3467         if (!p2p->user_initiated_pd)
3468                 return;
3469
3470         p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3471
3472         if (p2p->pd_retries) {
3473                 p2p->pd_retries--;
3474                 p2p_retry_pd(p2p);
3475         } else {
3476                 struct p2p_device *dev;
3477                 int for_join = 0;
3478
3479                 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3480                         if (os_memcmp(p2p->pending_pd_devaddr,
3481                                       dev->info.p2p_device_addr, ETH_ALEN) != 0)
3482                                 continue;
3483                         if (dev->req_config_methods &&
3484                             (dev->flags & P2P_DEV_PD_FOR_JOIN))
3485                                 for_join = 1;
3486                 }
3487
3488                 if (p2p->cfg->prov_disc_fail)
3489                         p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3490                                                  p2p->pending_pd_devaddr,
3491                                                  for_join ?
3492                                                  P2P_PROV_DISC_TIMEOUT_JOIN :
3493                                                  P2P_PROV_DISC_TIMEOUT);
3494                 p2p_reset_pending_pd(p2p);
3495         }
3496 }
3497
3498
3499 static void p2p_timeout_invite(struct p2p_data *p2p)
3500 {
3501         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3502         p2p_set_state(p2p, P2P_INVITE_LISTEN);
3503         if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3504                 /*
3505                  * Better remain on operating channel instead of listen channel
3506                  * when running a group.
3507                  */
3508                 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
3509                 p2p_set_timeout(p2p, 0, 100000);
3510                 return;
3511         }
3512         p2p_listen_in_find(p2p, 0);
3513 }
3514
3515
3516 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3517 {
3518         if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3519                 p2p_set_state(p2p, P2P_INVITE);
3520                 p2p_invite_send(p2p, p2p->invite_peer,
3521                                 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
3522         } else {
3523                 if (p2p->invite_peer) {
3524                         p2p_dbg(p2p, "Invitation Request retry limit reached");
3525                         if (p2p->cfg->invitation_result)
3526                                 p2p->cfg->invitation_result(
3527                                         p2p->cfg->cb_ctx, -1, NULL, NULL,
3528                                         p2p->invite_peer->info.p2p_device_addr,
3529                                         0, 0);
3530                 }
3531                 p2p_set_state(p2p, P2P_IDLE);
3532         }
3533 }
3534
3535
3536 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3537 {
3538         struct p2p_data *p2p = eloop_ctx;
3539
3540         p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
3541
3542         p2p->in_listen = 0;
3543
3544         switch (p2p->state) {
3545         case P2P_IDLE:
3546                 /* Check if we timed out waiting for PD req */
3547                 if (p2p->pending_action_state == P2P_PENDING_PD)
3548                         p2p_timeout_prov_disc_req(p2p);
3549                 break;
3550         case P2P_SEARCH:
3551                 /* Check if we timed out waiting for PD req */
3552                 if (p2p->pending_action_state == P2P_PENDING_PD)
3553                         p2p_timeout_prov_disc_req(p2p);
3554                 if (p2p->search_delay && !p2p->in_search_delay) {
3555                         p2p_dbg(p2p, "Delay search operation by %u ms",
3556                                 p2p->search_delay);
3557                         p2p->in_search_delay = 1;
3558                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3559                                         (p2p->search_delay % 1000) * 1000);
3560                         break;
3561                 }
3562                 p2p->in_search_delay = 0;
3563                 p2p_search(p2p);
3564                 break;
3565         case P2P_CONNECT:
3566                 p2p_timeout_connect(p2p);
3567                 break;
3568         case P2P_CONNECT_LISTEN:
3569                 p2p_timeout_connect_listen(p2p);
3570                 break;
3571         case P2P_GO_NEG:
3572                 break;
3573         case P2P_LISTEN_ONLY:
3574                 /* Check if we timed out waiting for PD req */
3575                 if (p2p->pending_action_state == P2P_PENDING_PD)
3576                         p2p_timeout_prov_disc_req(p2p);
3577
3578                 if (p2p->ext_listen_only) {
3579                         p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
3580                         p2p->ext_listen_only = 0;
3581                         p2p_set_state(p2p, P2P_IDLE);
3582                 }
3583                 break;
3584         case P2P_WAIT_PEER_CONNECT:
3585                 p2p_timeout_wait_peer_connect(p2p);
3586                 break;
3587         case P2P_WAIT_PEER_IDLE:
3588                 p2p_timeout_wait_peer_idle(p2p);
3589                 break;
3590         case P2P_SD_DURING_FIND:
3591                 p2p_timeout_sd_during_find(p2p);
3592                 break;
3593         case P2P_PROVISIONING:
3594                 break;
3595         case P2P_PD_DURING_FIND:
3596                 p2p_timeout_prov_disc_during_find(p2p);
3597                 break;
3598         case P2P_INVITE:
3599                 p2p_timeout_invite(p2p);
3600                 break;
3601         case P2P_INVITE_LISTEN:
3602                 p2p_timeout_invite_listen(p2p);
3603                 break;
3604         }
3605 }
3606
3607
3608 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
3609 {
3610         struct p2p_device *dev;
3611
3612         dev = p2p_get_device(p2p, peer_addr);
3613         p2p_dbg(p2p, "Local request to reject connection attempts by peer "
3614                 MACSTR, MAC2STR(peer_addr));
3615         if (dev == NULL) {
3616                 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
3617                 return -1;
3618         }
3619         dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
3620         dev->flags |= P2P_DEV_USER_REJECTED;
3621         return 0;
3622 }
3623
3624
3625 const char * p2p_wps_method_text(enum p2p_wps_method method)
3626 {
3627         switch (method) {
3628         case WPS_NOT_READY:
3629                 return "not-ready";
3630         case WPS_PIN_DISPLAY:
3631                 return "Display";
3632         case WPS_PIN_KEYPAD:
3633                 return "Keypad";
3634         case WPS_PBC:
3635                 return "PBC";
3636         case WPS_NFC:
3637                 return "NFC";
3638         }
3639
3640         return "??";
3641 }
3642
3643
3644 static const char * p2p_go_state_text(enum p2p_go_state go_state)
3645 {
3646         switch (go_state) {
3647         case UNKNOWN_GO:
3648                 return "unknown";
3649         case LOCAL_GO:
3650                 return "local";
3651         case  REMOTE_GO:
3652                 return "remote";
3653         }
3654
3655         return "??";
3656 }
3657
3658
3659 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
3660                                                const u8 *addr, int next)
3661 {
3662         struct p2p_device *dev;
3663
3664         if (addr)
3665                 dev = p2p_get_device(p2p, addr);
3666         else
3667                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
3668
3669         if (dev && next) {
3670                 dev = dl_list_first(&dev->list, struct p2p_device, list);
3671                 if (&dev->list == &p2p->devices)
3672                         dev = NULL;
3673         }
3674
3675         if (dev == NULL)
3676                 return NULL;
3677
3678         return &dev->info;
3679 }
3680
3681
3682 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
3683                           char *buf, size_t buflen)
3684 {
3685         struct p2p_device *dev;
3686         int res;
3687         char *pos, *end;
3688         struct os_reltime now;
3689
3690         if (info == NULL)
3691                 return -1;
3692
3693         dev = (struct p2p_device *) (((u8 *) info) -
3694                                      offsetof(struct p2p_device, info));
3695
3696         pos = buf;
3697         end = buf + buflen;
3698
3699         os_get_reltime(&now);
3700         res = os_snprintf(pos, end - pos,
3701                           "age=%d\n"
3702                           "listen_freq=%d\n"
3703                           "wps_method=%s\n"
3704                           "interface_addr=" MACSTR "\n"
3705                           "member_in_go_dev=" MACSTR "\n"
3706                           "member_in_go_iface=" MACSTR "\n"
3707                           "go_neg_req_sent=%d\n"
3708                           "go_state=%s\n"
3709                           "dialog_token=%u\n"
3710                           "intended_addr=" MACSTR "\n"
3711                           "country=%c%c\n"
3712                           "oper_freq=%d\n"
3713                           "req_config_methods=0x%x\n"
3714                           "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
3715                           "status=%d\n"
3716                           "invitation_reqs=%u\n",
3717                           (int) (now.sec - dev->last_seen.sec),
3718                           dev->listen_freq,
3719                           p2p_wps_method_text(dev->wps_method),
3720                           MAC2STR(dev->interface_addr),
3721                           MAC2STR(dev->member_in_go_dev),
3722                           MAC2STR(dev->member_in_go_iface),
3723                           dev->go_neg_req_sent,
3724                           p2p_go_state_text(dev->go_state),
3725                           dev->dialog_token,
3726                           MAC2STR(dev->intended_addr),
3727                           dev->country[0] ? dev->country[0] : '_',
3728                           dev->country[1] ? dev->country[1] : '_',
3729                           dev->oper_freq,
3730                           dev->req_config_methods,
3731                           dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
3732                           "[PROBE_REQ_ONLY]" : "",
3733                           dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
3734                           dev->flags & P2P_DEV_NOT_YET_READY ?
3735                           "[NOT_YET_READY]" : "",
3736                           dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
3737                           "[PD_PEER_DISPLAY]" : "",
3738                           dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
3739                           "[PD_PEER_KEYPAD]" : "",
3740                           dev->flags & P2P_DEV_USER_REJECTED ?
3741                           "[USER_REJECTED]" : "",
3742                           dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
3743                           "[PEER_WAITING_RESPONSE]" : "",
3744                           dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
3745                           "[PREFER_PERSISTENT_GROUP]" : "",
3746                           dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
3747                           "[WAIT_GO_NEG_RESPONSE]" : "",
3748                           dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
3749                           "[WAIT_GO_NEG_CONFIRM]" : "",
3750                           dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
3751                           "[GROUP_CLIENT_ONLY]" : "",
3752                           dev->flags & P2P_DEV_FORCE_FREQ ?
3753                           "[FORCE_FREQ]" : "",
3754                           dev->flags & P2P_DEV_PD_FOR_JOIN ?
3755                           "[PD_FOR_JOIN]" : "",
3756                           dev->status,
3757                           dev->invitation_reqs);
3758         if (res < 0 || res >= end - pos)
3759                 return pos - buf;
3760         pos += res;
3761
3762         if (dev->ext_listen_period) {
3763                 res = os_snprintf(pos, end - pos,
3764                                   "ext_listen_period=%u\n"
3765                                   "ext_listen_interval=%u\n",
3766                                   dev->ext_listen_period,
3767                                   dev->ext_listen_interval);
3768                 if (res < 0 || res >= end - pos)
3769                         return pos - buf;
3770                 pos += res;
3771         }
3772
3773         if (dev->oper_ssid_len) {
3774                 res = os_snprintf(pos, end - pos,
3775                                   "oper_ssid=%s\n",
3776                                   wpa_ssid_txt(dev->oper_ssid,
3777                                                dev->oper_ssid_len));
3778                 if (res < 0 || res >= end - pos)
3779                         return pos - buf;
3780                 pos += res;
3781         }
3782
3783 #ifdef CONFIG_WIFI_DISPLAY
3784         if (dev->info.wfd_subelems) {
3785                 res = os_snprintf(pos, end - pos, "wfd_subelems=");
3786                 if (res < 0 || res >= end - pos)
3787                         return pos - buf;
3788                 pos += res;
3789
3790                 pos += wpa_snprintf_hex(pos, end - pos,
3791                                         wpabuf_head(dev->info.wfd_subelems),
3792                                         wpabuf_len(dev->info.wfd_subelems));
3793
3794                 res = os_snprintf(pos, end - pos, "\n");
3795                 if (res < 0 || res >= end - pos)
3796                         return pos - buf;
3797                 pos += res;
3798         }
3799 #endif /* CONFIG_WIFI_DISPLAY */
3800
3801         return pos - buf;
3802 }
3803
3804
3805 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
3806 {
3807         return p2p_get_device(p2p, addr) != NULL;
3808 }
3809
3810
3811 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
3812 {
3813         if (enabled) {
3814                 p2p_dbg(p2p, "Client discoverability enabled");
3815                 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3816         } else {
3817                 p2p_dbg(p2p, "Client discoverability disabled");
3818                 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3819         }
3820 }
3821
3822
3823 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
3824                                               u32 duration2, u32 interval2)
3825 {
3826         struct wpabuf *req;
3827         struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
3828         u8 *len;
3829
3830         req = wpabuf_alloc(100);
3831         if (req == NULL)
3832                 return NULL;
3833
3834         if (duration1 || interval1) {
3835                 os_memset(&desc1, 0, sizeof(desc1));
3836                 desc1.count_type = 1;
3837                 desc1.duration = duration1;
3838                 desc1.interval = interval1;
3839                 ptr1 = &desc1;
3840
3841                 if (duration2 || interval2) {
3842                         os_memset(&desc2, 0, sizeof(desc2));
3843                         desc2.count_type = 2;
3844                         desc2.duration = duration2;
3845                         desc2.interval = interval2;
3846                         ptr2 = &desc2;
3847                 }
3848         }
3849
3850         p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
3851         len = p2p_buf_add_ie_hdr(req);
3852         p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
3853         p2p_buf_update_ie_hdr(req, len);
3854
3855         return req;
3856 }
3857
3858
3859 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
3860                      const u8 *own_interface_addr, unsigned int freq,
3861                      u32 duration1, u32 interval1, u32 duration2,
3862                      u32 interval2)
3863 {
3864         struct wpabuf *req;
3865
3866         p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
3867                 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
3868                 "dur2=%u int2=%u",
3869                 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
3870                 freq, duration1, interval1, duration2, interval2);
3871
3872         req = p2p_build_presence_req(duration1, interval1, duration2,
3873                                      interval2);
3874         if (req == NULL)
3875                 return -1;
3876
3877         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3878         if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
3879                             go_interface_addr,
3880                             wpabuf_head(req), wpabuf_len(req), 200) < 0) {
3881                 p2p_dbg(p2p, "Failed to send Action frame");
3882         }
3883         wpabuf_free(req);
3884
3885         return 0;
3886 }
3887
3888
3889 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
3890                                                size_t noa_len, u8 dialog_token)
3891 {
3892         struct wpabuf *resp;
3893         u8 *len;
3894
3895         resp = wpabuf_alloc(100 + noa_len);
3896         if (resp == NULL)
3897                 return NULL;
3898
3899         p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
3900         len = p2p_buf_add_ie_hdr(resp);
3901         p2p_buf_add_status(resp, status);
3902         if (noa) {
3903                 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
3904                 wpabuf_put_le16(resp, noa_len);
3905                 wpabuf_put_data(resp, noa, noa_len);
3906         } else
3907                 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
3908         p2p_buf_update_ie_hdr(resp, len);
3909
3910         return resp;
3911 }
3912
3913
3914 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
3915                                      const u8 *sa, const u8 *data, size_t len,
3916                                      int rx_freq)
3917 {
3918         struct p2p_message msg;
3919         u8 status;
3920         struct wpabuf *resp;
3921         size_t g;
3922         struct p2p_group *group = NULL;
3923         int parsed = 0;
3924         u8 noa[50];
3925         int noa_len;
3926
3927         p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
3928
3929         for (g = 0; g < p2p->num_groups; g++) {
3930                 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
3931                               ETH_ALEN) == 0) {
3932                         group = p2p->groups[g];
3933                         break;
3934                 }
3935         }
3936         if (group == NULL) {
3937                 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
3938                         MACSTR, MAC2STR(da));
3939                 return;
3940         }
3941
3942         if (p2p_parse(data, len, &msg) < 0) {
3943                 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
3944                 status = P2P_SC_FAIL_INVALID_PARAMS;
3945                 goto fail;
3946         }
3947         parsed = 1;
3948
3949         if (msg.noa == NULL) {
3950                 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
3951                 status = P2P_SC_FAIL_INVALID_PARAMS;
3952                 goto fail;
3953         }
3954
3955         status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
3956
3957 fail:
3958         if (p2p->cfg->get_noa)
3959                 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
3960                                             sizeof(noa));
3961         else
3962                 noa_len = -1;
3963         resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
3964                                        noa_len > 0 ? noa_len : 0,
3965                                        msg.dialog_token);
3966         if (parsed)
3967                 p2p_parse_free(&msg);
3968         if (resp == NULL)
3969                 return;
3970
3971         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3972         if (p2p_send_action(p2p, rx_freq, sa, da, da,
3973                             wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
3974                 p2p_dbg(p2p, "Failed to send Action frame");
3975         }
3976         wpabuf_free(resp);
3977 }
3978
3979
3980 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
3981                                       const u8 *sa, const u8 *data, size_t len)
3982 {
3983         struct p2p_message msg;
3984
3985         p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
3986
3987         if (p2p_parse(data, len, &msg) < 0) {
3988                 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
3989                 return;
3990         }
3991
3992         if (msg.status == NULL || msg.noa == NULL) {
3993                 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
3994                 p2p_parse_free(&msg);
3995                 return;
3996         }
3997
3998         if (p2p->cfg->presence_resp) {
3999                 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
4000                                         msg.noa, msg.noa_len);
4001         }
4002
4003         if (*msg.status) {
4004                 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
4005                         *msg.status);
4006                 p2p_parse_free(&msg);
4007                 return;
4008         }
4009
4010         p2p_dbg(p2p, "P2P Presence Request was accepted");
4011         wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
4012                     msg.noa, msg.noa_len);
4013         /* TODO: process NoA */
4014         p2p_parse_free(&msg);
4015 }
4016
4017
4018 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
4019 {
4020         struct p2p_data *p2p = eloop_ctx;
4021
4022         if (p2p->ext_listen_interval) {
4023                 /* Schedule next extended listen timeout */
4024                 eloop_register_timeout(p2p->ext_listen_interval_sec,
4025                                        p2p->ext_listen_interval_usec,
4026                                        p2p_ext_listen_timeout, p2p, NULL);
4027         }
4028
4029         if ((p2p->cfg->is_p2p_in_progress &&
4030              p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
4031             (p2p->pending_action_state == P2P_PENDING_PD &&
4032              p2p->pd_retries > 0)) {
4033                 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
4034                         p2p_state_txt(p2p->state));
4035                 return;
4036         }
4037
4038         if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
4039                 /*
4040                  * This should not really happen, but it looks like the Listen
4041                  * command may fail is something else (e.g., a scan) was
4042                  * running at an inconvenient time. As a workaround, allow new
4043                  * Extended Listen operation to be started.
4044                  */
4045                 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
4046                 p2p->ext_listen_only = 0;
4047                 p2p_set_state(p2p, P2P_IDLE);
4048         }
4049
4050         if (p2p->state != P2P_IDLE) {
4051                 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
4052                 return;
4053         }
4054
4055         p2p_dbg(p2p, "Extended Listen timeout");
4056         p2p->ext_listen_only = 1;
4057         if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
4058                 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
4059                 p2p->ext_listen_only = 0;
4060         }
4061 }
4062
4063
4064 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
4065                    unsigned int interval)
4066 {
4067         if (period > 65535 || interval > 65535 || period > interval ||
4068             (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
4069                 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
4070                         period, interval);
4071                 return -1;
4072         }
4073
4074         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
4075
4076         if (interval == 0) {
4077                 p2p_dbg(p2p, "Disabling Extended Listen Timing");
4078                 p2p->ext_listen_period = 0;
4079                 p2p->ext_listen_interval = 0;
4080                 return 0;
4081         }
4082
4083         p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
4084                 period, interval);
4085         p2p->ext_listen_period = period;
4086         p2p->ext_listen_interval = interval;
4087         p2p->ext_listen_interval_sec = interval / 1000;
4088         p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
4089
4090         eloop_register_timeout(p2p->ext_listen_interval_sec,
4091                                p2p->ext_listen_interval_usec,
4092                                p2p_ext_listen_timeout, p2p, NULL);
4093
4094         return 0;
4095 }
4096
4097
4098 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4099                       const u8 *ie, size_t ie_len)
4100 {
4101         struct p2p_message msg;
4102
4103         if (bssid == NULL || ie == NULL)
4104                 return;
4105
4106         os_memset(&msg, 0, sizeof(msg));
4107         if (p2p_parse_ies(ie, ie_len, &msg))
4108                 return;
4109         if (msg.minor_reason_code == NULL) {
4110                 p2p_parse_free(&msg);
4111                 return;
4112         }
4113
4114         p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
4115                 " reason_code=%u minor_reason_code=%u",
4116                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4117
4118         p2p_parse_free(&msg);
4119 }
4120
4121
4122 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4123                         const u8 *ie, size_t ie_len)
4124 {
4125         struct p2p_message msg;
4126
4127         if (bssid == NULL || ie == NULL)
4128                 return;
4129
4130         os_memset(&msg, 0, sizeof(msg));
4131         if (p2p_parse_ies(ie, ie_len, &msg))
4132                 return;
4133         if (msg.minor_reason_code == NULL) {
4134                 p2p_parse_free(&msg);
4135                 return;
4136         }
4137
4138         p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
4139                 " reason_code=%u minor_reason_code=%u",
4140                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4141
4142         p2p_parse_free(&msg);
4143 }
4144
4145
4146 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
4147 {
4148         if (enabled) {
4149                 p2p_dbg(p2p, "Managed P2P Device operations enabled");
4150                 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
4151         } else {
4152                 p2p_dbg(p2p, "Managed P2P Device operations disabled");
4153                 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
4154         }
4155 }
4156
4157
4158 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class,
4159                                  u8 *op_channel)
4160 {
4161         return p2p_channel_random_social(&p2p->channels, op_class, op_channel);
4162 }
4163
4164
4165 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
4166                            u8 forced)
4167 {
4168         if (p2p_channel_to_freq(reg_class, channel) < 0)
4169                 return -1;
4170
4171         p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
4172                 reg_class, channel);
4173
4174         /*
4175          * Listen channel was set in configuration or set by control interface;
4176          * cannot override it.
4177          */
4178         if (p2p->cfg->channel_forced && forced == 0)
4179                 return -1;
4180
4181         if (p2p->state == P2P_IDLE) {
4182                 p2p->cfg->reg_class = reg_class;
4183                 p2p->cfg->channel = channel;
4184                 p2p->cfg->channel_forced = forced;
4185         } else {
4186                 p2p_dbg(p2p, "Defer setting listen channel");
4187                 p2p->pending_reg_class = reg_class;
4188                 p2p->pending_channel = channel;
4189                 p2p->pending_channel_forced = forced;
4190         }
4191
4192         return 0;
4193 }
4194
4195
4196 u8 p2p_get_listen_channel(struct p2p_data *p2p)
4197 {
4198         return p2p->cfg->channel;
4199 }
4200
4201
4202 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
4203 {
4204         p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
4205         if (postfix == NULL) {
4206                 p2p->cfg->ssid_postfix_len = 0;
4207                 return 0;
4208         }
4209         if (len > sizeof(p2p->cfg->ssid_postfix))
4210                 return -1;
4211         os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
4212         p2p->cfg->ssid_postfix_len = len;
4213         return 0;
4214 }
4215
4216
4217 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
4218                          int cfg_op_channel)
4219 {
4220         if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
4221                 return -1;
4222
4223         p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
4224                 op_reg_class, op_channel);
4225         p2p->cfg->op_reg_class = op_reg_class;
4226         p2p->cfg->op_channel = op_channel;
4227         p2p->cfg->cfg_op_channel = cfg_op_channel;
4228         return 0;
4229 }
4230
4231
4232 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
4233                       const struct p2p_channel *pref_chan)
4234 {
4235         struct p2p_channel *n;
4236
4237         if (pref_chan) {
4238                 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
4239                 if (n == NULL)
4240                         return -1;
4241                 os_memcpy(n, pref_chan,
4242                           num_pref_chan * sizeof(struct p2p_channel));
4243         } else
4244                 n = NULL;
4245
4246         os_free(p2p->cfg->pref_chan);
4247         p2p->cfg->pref_chan = n;
4248         p2p->cfg->num_pref_chan = num_pref_chan;
4249
4250         return 0;
4251 }
4252
4253
4254 int p2p_set_no_go_freq(struct p2p_data *p2p,
4255                        const struct wpa_freq_range_list *list)
4256 {
4257         struct wpa_freq_range *tmp;
4258
4259         if (list == NULL || list->num == 0) {
4260                 os_free(p2p->no_go_freq.range);
4261                 p2p->no_go_freq.range = NULL;
4262                 p2p->no_go_freq.num = 0;
4263                 return 0;
4264         }
4265
4266         tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4267         if (tmp == NULL)
4268                 return -1;
4269         os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4270         os_free(p2p->no_go_freq.range);
4271         p2p->no_go_freq.range = tmp;
4272         p2p->no_go_freq.num = list->num;
4273         p2p_dbg(p2p, "Updated no GO chan list");
4274
4275         return 0;
4276 }
4277
4278
4279 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4280                            u8 *iface_addr)
4281 {
4282         struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4283         if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4284                 return -1;
4285         os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4286         return 0;
4287 }
4288
4289
4290 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4291                            u8 *dev_addr)
4292 {
4293         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4294         if (dev == NULL)
4295                 return -1;
4296         os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4297         return 0;
4298 }
4299
4300
4301 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4302 {
4303         os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4304         if (is_zero_ether_addr(p2p->peer_filter))
4305                 p2p_dbg(p2p, "Disable peer filter");
4306         else
4307                 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4308                         MAC2STR(p2p->peer_filter));
4309 }
4310
4311
4312 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4313 {
4314         p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4315         if (p2p->cross_connect == enabled)
4316                 return;
4317         p2p->cross_connect = enabled;
4318         /* TODO: may need to tear down any action group where we are GO(?) */
4319 }
4320
4321
4322 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4323 {
4324         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4325         if (dev == NULL)
4326                 return -1;
4327         if (dev->oper_freq <= 0)
4328                 return -1;
4329         return dev->oper_freq;
4330 }
4331
4332
4333 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4334 {
4335         p2p_dbg(p2p, "Intra BSS distribution %s",
4336                 enabled ? "enabled" : "disabled");
4337         p2p->cfg->p2p_intra_bss = enabled;
4338 }
4339
4340
4341 void p2p_update_channel_list(struct p2p_data *p2p,
4342                              const struct p2p_channels *chan,
4343                              const struct p2p_channels *cli_chan)
4344 {
4345         p2p_dbg(p2p, "Update channel list");
4346         os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4347         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4348         os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4349                   sizeof(struct p2p_channels));
4350         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4351 }
4352
4353
4354 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4355                     const u8 *src, const u8 *bssid, const u8 *buf,
4356                     size_t len, unsigned int wait_time)
4357 {
4358         if (p2p->p2p_scan_running) {
4359                 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4360                 if (p2p->after_scan_tx) {
4361                         p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4362                         os_free(p2p->after_scan_tx);
4363                 }
4364                 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4365                                                len);
4366                 if (p2p->after_scan_tx == NULL)
4367                         return -1;
4368                 p2p->after_scan_tx->freq = freq;
4369                 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4370                 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4371                 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4372                 p2p->after_scan_tx->len = len;
4373                 p2p->after_scan_tx->wait_time = wait_time;
4374                 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4375                 return 0;
4376         }
4377
4378         return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4379                                      buf, len, wait_time);
4380 }
4381
4382
4383 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4384                            int freq_overall)
4385 {
4386         p2p_dbg(p2p, "Best channel: 2.4 GHz: %d,  5 GHz: %d,  overall: %d",
4387                 freq_24, freq_5, freq_overall);
4388         p2p->best_freq_24 = freq_24;
4389         p2p->best_freq_5 = freq_5;
4390         p2p->best_freq_overall = freq_overall;
4391 }
4392
4393
4394 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4395 {
4396         p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4397         p2p->own_freq_preference = freq;
4398 }
4399
4400
4401 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4402 {
4403         if (p2p == NULL || p2p->go_neg_peer == NULL)
4404                 return NULL;
4405         return p2p->go_neg_peer->info.p2p_device_addr;
4406 }
4407
4408
4409 const struct p2p_peer_info *
4410 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4411 {
4412         struct p2p_device *dev;
4413
4414         if (addr) {
4415                 dev = p2p_get_device(p2p, addr);
4416                 if (!dev)
4417                         return NULL;
4418
4419                 if (!next) {
4420                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4421                                 return NULL;
4422
4423                         return &dev->info;
4424                 } else {
4425                         do {
4426                                 dev = dl_list_first(&dev->list,
4427                                                     struct p2p_device,
4428                                                     list);
4429                                 if (!dev || &dev->list == &p2p->devices)
4430                                         return NULL;
4431                         } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4432                 }
4433         } else {
4434                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4435                 if (!dev)
4436                         return NULL;
4437                 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4438                         dev = dl_list_first(&dev->list,
4439                                             struct p2p_device,
4440                                             list);
4441                         if (!dev || &dev->list == &p2p->devices)
4442                                 return NULL;
4443                 }
4444         }
4445
4446         return &dev->info;
4447 }
4448
4449
4450 int p2p_in_progress(struct p2p_data *p2p)
4451 {
4452         if (p2p == NULL)
4453                 return 0;
4454         if (p2p->state == P2P_SEARCH)
4455                 return 2;
4456         return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4457 }
4458
4459
4460 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4461                             u8 client_timeout)
4462 {
4463         if (p2p) {
4464                 p2p->go_timeout = go_timeout;
4465                 p2p->client_timeout = client_timeout;
4466         }
4467 }
4468
4469
4470 #ifdef CONFIG_WIFI_DISPLAY
4471
4472 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4473 {
4474         size_t g;
4475         struct p2p_group *group;
4476
4477         for (g = 0; g < p2p->num_groups; g++) {
4478                 group = p2p->groups[g];
4479                 p2p_group_force_beacon_update_ies(group);
4480         }
4481 }
4482
4483
4484 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4485 {
4486         wpabuf_free(p2p->wfd_ie_beacon);
4487         p2p->wfd_ie_beacon = ie;
4488         p2p_update_wfd_ie_groups(p2p);
4489         return 0;
4490 }
4491
4492
4493 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4494 {
4495         wpabuf_free(p2p->wfd_ie_probe_req);
4496         p2p->wfd_ie_probe_req = ie;
4497         return 0;
4498 }
4499
4500
4501 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4502 {
4503         wpabuf_free(p2p->wfd_ie_probe_resp);
4504         p2p->wfd_ie_probe_resp = ie;
4505         p2p_update_wfd_ie_groups(p2p);
4506         return 0;
4507 }
4508
4509
4510 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4511 {
4512         wpabuf_free(p2p->wfd_ie_assoc_req);
4513         p2p->wfd_ie_assoc_req = ie;
4514         return 0;
4515 }
4516
4517
4518 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4519 {
4520         wpabuf_free(p2p->wfd_ie_invitation);
4521         p2p->wfd_ie_invitation = ie;
4522         return 0;
4523 }
4524
4525
4526 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4527 {
4528         wpabuf_free(p2p->wfd_ie_prov_disc_req);
4529         p2p->wfd_ie_prov_disc_req = ie;
4530         return 0;
4531 }
4532
4533
4534 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
4535 {
4536         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
4537         p2p->wfd_ie_prov_disc_resp = ie;
4538         return 0;
4539 }
4540
4541
4542 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
4543 {
4544         wpabuf_free(p2p->wfd_ie_go_neg);
4545         p2p->wfd_ie_go_neg = ie;
4546         return 0;
4547 }
4548
4549
4550 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
4551 {
4552         wpabuf_free(p2p->wfd_dev_info);
4553         if (elem) {
4554                 p2p->wfd_dev_info = wpabuf_dup(elem);
4555                 if (p2p->wfd_dev_info == NULL)
4556                         return -1;
4557         } else
4558                 p2p->wfd_dev_info = NULL;
4559
4560         return 0;
4561 }
4562
4563
4564 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
4565 {
4566         wpabuf_free(p2p->wfd_assoc_bssid);
4567         if (elem) {
4568                 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
4569                 if (p2p->wfd_assoc_bssid == NULL)
4570                         return -1;
4571         } else
4572                 p2p->wfd_assoc_bssid = NULL;
4573
4574         return 0;
4575 }
4576
4577
4578 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
4579                                   const struct wpabuf *elem)
4580 {
4581         wpabuf_free(p2p->wfd_coupled_sink_info);
4582         if (elem) {
4583                 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
4584                 if (p2p->wfd_coupled_sink_info == NULL)
4585                         return -1;
4586         } else
4587                 p2p->wfd_coupled_sink_info = NULL;
4588
4589         return 0;
4590 }
4591
4592 #endif /* CONFIG_WIFI_DISPLAY */
4593
4594
4595 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
4596                      int max_disc_tu)
4597 {
4598         if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
4599                 return -1;
4600
4601         p2p->min_disc_int = min_disc_int;
4602         p2p->max_disc_int = max_disc_int;
4603         p2p->max_disc_tu = max_disc_tu;
4604         p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
4605                 min_disc_int, max_disc_int, max_disc_tu);
4606
4607         return 0;
4608 }
4609
4610
4611 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
4612 {
4613         va_list ap;
4614         char buf[500];
4615
4616         if (!p2p->cfg->debug_print)
4617                 return;
4618
4619         va_start(ap, fmt);
4620         vsnprintf(buf, sizeof(buf), fmt, ap);
4621         buf[sizeof(buf) - 1] = '\0';
4622         va_end(ap);
4623         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
4624 }
4625
4626
4627 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
4628 {
4629         va_list ap;
4630         char buf[500];
4631
4632         if (!p2p->cfg->debug_print)
4633                 return;
4634
4635         va_start(ap, fmt);
4636         vsnprintf(buf, sizeof(buf), fmt, ap);
4637         buf[sizeof(buf) - 1] = '\0';
4638         va_end(ap);
4639         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
4640 }
4641
4642
4643 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
4644 {
4645         va_list ap;
4646         char buf[500];
4647
4648         if (!p2p->cfg->debug_print)
4649                 return;
4650
4651         va_start(ap, fmt);
4652         vsnprintf(buf, sizeof(buf), fmt, ap);
4653         buf[sizeof(buf) - 1] = '\0';
4654         va_end(ap);
4655         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
4656 }
4657
4658
4659 void p2p_loop_on_known_peers(struct p2p_data *p2p,
4660                              void (*peer_callback)(struct p2p_peer_info *peer,
4661                                                    void *user_data),
4662                              void *user_data)
4663 {
4664         struct p2p_device *dev, *n;
4665
4666         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
4667                 peer_callback(&dev->info, user_data);
4668         }
4669 }
4670
4671
4672 #ifdef CONFIG_WPS_NFC
4673
4674 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
4675                                               int client_freq,
4676                                               const u8 *go_dev_addr,
4677                                               const u8 *ssid, size_t ssid_len)
4678 {
4679         struct wpabuf *buf;
4680         u8 op_class, channel;
4681         enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
4682
4683         buf = wpabuf_alloc(1000);
4684         if (buf == NULL)
4685                 return NULL;
4686
4687         op_class = p2p->cfg->reg_class;
4688         channel = p2p->cfg->channel;
4689
4690         p2p_buf_add_capability(buf, p2p->dev_capab &
4691                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
4692         p2p_buf_add_device_info(buf, p2p, NULL);
4693
4694         if (p2p->num_groups > 0) {
4695                 int freq = p2p_group_get_freq(p2p->groups[0]);
4696                 role = P2P_GO_IN_A_GROUP;
4697                 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
4698                         p2p_dbg(p2p,
4699                                 "Unknown GO operating frequency %d MHz for NFC handover",
4700                                 freq);
4701                         wpabuf_free(buf);
4702                         return NULL;
4703                 }
4704         } else if (client_freq > 0) {
4705                 role = P2P_CLIENT_IN_A_GROUP;
4706                 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
4707                         p2p_dbg(p2p,
4708                                 "Unknown client operating frequency %d MHz for NFC handover",
4709                                 client_freq);
4710                         wpabuf_free(buf);
4711                         return NULL;
4712                 }
4713         }
4714
4715         p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
4716                                        channel, role);
4717
4718         if (p2p->num_groups > 0) {
4719                 /* Limit number of clients to avoid very long message */
4720                 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
4721                 p2p_group_buf_add_id(p2p->groups[0], buf);
4722         } else if (client_freq > 0 &&
4723                    go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
4724                    ssid && ssid_len > 0) {
4725                 /*
4726                  * Add the optional P2P Group ID to indicate in which group this
4727                  * device is a P2P Client.
4728                  */
4729                 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
4730         }
4731
4732         return buf;
4733 }
4734
4735
4736 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
4737                                            int client_freq,
4738                                            const u8 *go_dev_addr,
4739                                            const u8 *ssid, size_t ssid_len)
4740 {
4741         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
4742                                       ssid_len);
4743 }
4744
4745
4746 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
4747                                            int client_freq,
4748                                            const u8 *go_dev_addr,
4749                                            const u8 *ssid, size_t ssid_len)
4750 {
4751         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
4752                                       ssid_len);
4753 }
4754
4755
4756 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
4757                                         struct p2p_nfc_params *params)
4758 {
4759         struct p2p_message msg;
4760         struct p2p_device *dev;
4761         const u8 *p2p_dev_addr;
4762         int freq;
4763         enum p2p_role_indication role;
4764
4765         params->next_step = NO_ACTION;
4766
4767         if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
4768                                    params->p2p_attr, params->p2p_len, &msg)) {
4769                 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
4770                 p2p_parse_free(&msg);
4771                 return -1;
4772         }
4773
4774         if (msg.p2p_device_addr)
4775                 p2p_dev_addr = msg.p2p_device_addr;
4776         else if (msg.device_id)
4777                 p2p_dev_addr = msg.device_id;
4778         else {
4779                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
4780                 p2p_parse_free(&msg);
4781                 return -1;
4782         }
4783
4784         if (msg.oob_dev_password) {
4785                 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
4786                           msg.oob_dev_password_len);
4787                 params->oob_dev_pw_len = msg.oob_dev_password_len;
4788         }
4789
4790         dev = p2p_create_device(p2p, p2p_dev_addr);
4791         if (dev == NULL) {
4792                 p2p_parse_free(&msg);
4793                 return -1;
4794         }
4795
4796         params->peer = &dev->info;
4797
4798         os_get_reltime(&dev->last_seen);
4799         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
4800         p2p_copy_wps_info(p2p, dev, 0, &msg);
4801
4802         if (!msg.oob_go_neg_channel) {
4803                 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
4804                 return -1;
4805         }
4806
4807         if (msg.oob_go_neg_channel[3] == 0 &&
4808             msg.oob_go_neg_channel[4] == 0)
4809                 freq = 0;
4810         else
4811                 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
4812                                            msg.oob_go_neg_channel[4]);
4813         if (freq < 0) {
4814                 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
4815                 return -1;
4816         }
4817         role = msg.oob_go_neg_channel[5];
4818
4819         if (role == P2P_GO_IN_A_GROUP) {
4820                 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
4821                 params->go_freq = freq;
4822         } else if (role == P2P_CLIENT_IN_A_GROUP) {
4823                 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
4824                         freq);
4825                 params->go_freq = freq;
4826         } else
4827                 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
4828         dev->oob_go_neg_freq = freq;
4829
4830         if (!params->sel && role != P2P_GO_IN_A_GROUP) {
4831                 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
4832                                            p2p->cfg->channel);
4833                 if (freq < 0) {
4834                         p2p_dbg(p2p, "Own listen channel not known");
4835                         return -1;
4836                 }
4837                 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
4838                 dev->oob_go_neg_freq = freq;
4839         }
4840
4841         if (msg.group_id) {
4842                 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
4843                 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
4844                 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
4845                           params->go_ssid_len);
4846         }
4847
4848         if (dev->flags & P2P_DEV_USER_REJECTED) {
4849                 p2p_dbg(p2p, "Do not report rejected device");
4850                 p2p_parse_free(&msg);
4851                 return 0;
4852         }
4853
4854         if (!(dev->flags & P2P_DEV_REPORTED)) {
4855                 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
4856                                     !(dev->flags & P2P_DEV_REPORTED_ONCE));
4857                 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
4858         }
4859         p2p_parse_free(&msg);
4860
4861         if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
4862                 params->next_step = BOTH_GO;
4863         else if (role == P2P_GO_IN_A_GROUP)
4864                 params->next_step = JOIN_GROUP;
4865         else if (role == P2P_CLIENT_IN_A_GROUP) {
4866                 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
4867                 params->next_step = PEER_CLIENT;
4868         } else if (p2p->num_groups > 0)
4869                 params->next_step = AUTH_JOIN;
4870         else if (params->sel)
4871                 params->next_step = INIT_GO_NEG;
4872         else
4873                 params->next_step = RESP_GO_NEG;
4874
4875         return 0;
4876 }
4877
4878
4879 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
4880                                       int go_intent,
4881                                       const u8 *own_interface_addr)
4882 {
4883
4884         p2p->authorized_oob_dev_pw_id = dev_pw_id;
4885         if (dev_pw_id == 0) {
4886                 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
4887                 return;
4888         }
4889
4890         p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
4891                 dev_pw_id);
4892
4893         p2p->go_intent = go_intent;
4894         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
4895 }
4896
4897 #endif /* CONFIG_WPS_NFC */
4898
4899
4900 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
4901 {
4902         if (len < 8 || len > 63)
4903                 return -1;
4904         p2p->cfg->passphrase_len = len;
4905         return 0;
4906 }
4907
4908
4909 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
4910 {
4911         p2p->vendor_elem = vendor_elem;
4912 }