src/p2p/p2p.c

   1 /*
   2  * Wi-Fi Direct - P2P module
   3  * Copyright (c) 2009-2010, Atheros Communications
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "eloop.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/ieee802_11_common.h"
  15 #include "common/wpa_ctrl.h"
  16 #include "wps/wps_i.h"
  17 #include "p2p_i.h"
  18 #include "p2p.h"
  19
  20
  21 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
  22 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
  23 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
  24                                      const u8 *sa, const u8 *data, size_t len,
  25                                      int rx_freq);
  26 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
  27                                       const u8 *sa, const u8 *data,
  28                                       size_t len);
  29 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
  30 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx);
  31
  32
  33 /*
  34  * p2p_scan recovery timeout
  35  *
  36  * Many drivers are using 30 second timeout on scan results. Allow a bit larger
  37  * timeout for this to avoid hitting P2P timeout unnecessarily.
  38  */
  39 #define P2P_SCAN_TIMEOUT 35
  40
  41 /**
  42  * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer
  43  * entries will be removed
  44  */
  45 #ifndef P2P_PEER_EXPIRATION_AGE
  46 #define P2P_PEER_EXPIRATION_AGE 60
  47 #endif /* P2P_PEER_EXPIRATION_AGE */
  48
  49 #define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2)
  50
  51 static void p2p_expire_peers(struct p2p_data *p2p)
  52 {
  53         struct p2p_device *dev, *n;
  54         struct os_reltime now;
  55         size_t i;
  56
  57         os_get_reltime(&now);
  58         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
  59                 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
  60                         continue;
  61
  62                 if (dev == p2p->go_neg_peer) {
  63                         /*
  64                          * GO Negotiation is in progress with the peer, so
  65                          * don't expire the peer entry until GO Negotiation
  66                          * fails or times out.
  67                          */
  68                         continue;
  69                 }
  70
  71                 if (p2p->cfg->go_connected &&
  72                     p2p->cfg->go_connected(p2p->cfg->cb_ctx,
  73                                            dev->info.p2p_device_addr)) {
  74                         /*
  75                          * We are connected as a client to a group in which the
  76                          * peer is the GO, so do not expire the peer entry.
  77                          */
  78                         os_get_reltime(&dev->last_seen);
  79                         continue;
  80                 }
  81
  82                 for (i = 0; i < p2p->num_groups; i++) {
  83                         if (p2p_group_is_client_connected(
  84                                     p2p->groups[i], dev->info.p2p_device_addr))
  85                                 break;
  86                 }
  87                 if (i < p2p->num_groups) {
  88                         /*
  89                          * The peer is connected as a client in a group where
  90                          * we are the GO, so do not expire the peer entry.
  91                          */
  92                         os_get_reltime(&dev->last_seen);
  93                         continue;
  94                 }
  95
  96                 p2p_dbg(p2p, "Expiring old peer entry " MACSTR,
  97                         MAC2STR(dev->info.p2p_device_addr));
  98                 dl_list_del(&dev->list);
  99                 p2p_device_free(p2p, dev);
 100         }
 101 }
 102
 103
 104 static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx)
 105 {
 106         struct p2p_data *p2p = eloop_ctx;
 107         p2p_expire_peers(p2p);
 108         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
 109                                p2p_expiration_timeout, p2p, NULL);
 110 }
 111
 112
 113 static const char * p2p_state_txt(int state)
 114 {
 115         switch (state) {
 116         case P2P_IDLE:
 117                 return "IDLE";
 118         case P2P_SEARCH:
 119                 return "SEARCH";
 120         case P2P_CONNECT:
 121                 return "CONNECT";
 122         case P2P_CONNECT_LISTEN:
 123                 return "CONNECT_LISTEN";
 124         case P2P_GO_NEG:
 125                 return "GO_NEG";
 126         case P2P_LISTEN_ONLY:
 127                 return "LISTEN_ONLY";
 128         case P2P_WAIT_PEER_CONNECT:
 129                 return "WAIT_PEER_CONNECT";
 130         case P2P_WAIT_PEER_IDLE:
 131                 return "WAIT_PEER_IDLE";
 132         case P2P_SD_DURING_FIND:
 133                 return "SD_DURING_FIND";
 134         case P2P_PROVISIONING:
 135                 return "PROVISIONING";
 136         case P2P_PD_DURING_FIND:
 137                 return "PD_DURING_FIND";
 138         case P2P_INVITE:
 139                 return "INVITE";
 140         case P2P_INVITE_LISTEN:
 141                 return "INVITE_LISTEN";
 142         default:
 143                 return "?";
 144         }
 145 }
 146
 147
 148 const char * p2p_get_state_txt(struct p2p_data *p2p)
 149 {
 150         return p2p_state_txt(p2p->state);
 151 }
 152
 153
 154 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 155 {
 156         struct p2p_device *dev = NULL;
 157
 158         if (!addr || !p2p)
 159                 return 0;
 160
 161         dev = p2p_get_device(p2p, addr);
 162         if (dev)
 163                 return dev->wps_prov_info;
 164         else
 165                 return 0;
 166 }
 167
 168
 169 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 170 {
 171         struct p2p_device *dev = NULL;
 172
 173         if (!addr || !p2p)
 174                 return;
 175
 176         dev = p2p_get_device(p2p, addr);
 177         if (dev)
 178                 dev->wps_prov_info = 0;
 179 }
 180
 181
 182 void p2p_set_state(struct p2p_data *p2p, int new_state)
 183 {
 184         p2p_dbg(p2p, "State %s -> %s",
 185                 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
 186         p2p->state = new_state;
 187
 188         if (new_state == P2P_IDLE && p2p->pending_channel) {
 189                 p2p_dbg(p2p, "Apply change in listen channel");
 190                 p2p->cfg->reg_class = p2p->pending_reg_class;
 191                 p2p->cfg->channel = p2p->pending_channel;
 192                 p2p->pending_reg_class = 0;
 193                 p2p->pending_channel = 0;
 194         }
 195 }
 196
 197
 198 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
 199 {
 200         p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
 201                 p2p_state_txt(p2p->state), sec, usec);
 202         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 203         eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
 204 }
 205
 206
 207 void p2p_clear_timeout(struct p2p_data *p2p)
 208 {
 209         p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
 210         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 211 }
 212
 213
 214 void p2p_go_neg_failed(struct p2p_data *p2p, int status)
 215 {
 216         struct p2p_go_neg_results res;
 217         struct p2p_device *peer = p2p->go_neg_peer;
 218
 219         if (!peer)
 220                 return;
 221
 222         p2p_clear_timeout(p2p);
 223         eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
 224         p2p_set_state(p2p, P2P_IDLE);
 225
 226         peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
 227         peer->wps_method = WPS_NOT_READY;
 228         peer->oob_pw_id = 0;
 229         wpabuf_free(peer->go_neg_conf);
 230         peer->go_neg_conf = NULL;
 231         p2p->go_neg_peer = NULL;
 232
 233         os_memset(&res, 0, sizeof(res));
 234         res.status = status;
 235         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
 236         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
 237         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
 238 }
 239
 240
 241 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
 242 {
 243         unsigned int r, tu;
 244         int freq;
 245         struct wpabuf *ies;
 246
 247         p2p_dbg(p2p, "Starting short listen state (state=%s)",
 248                 p2p_state_txt(p2p->state));
 249
 250         if (p2p->pending_listen_freq) {
 251                 /* We have a pending p2p_listen request */
 252                 p2p_dbg(p2p, "p2p_listen command pending already");
 253                 return;
 254         }
 255
 256         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 257         if (freq < 0) {
 258                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 259                 return;
 260         }
 261
 262         if (os_get_random((u8 *) &r, sizeof(r)) < 0)
 263                 r = 0;
 264         tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
 265               p2p->min_disc_int) * 100;
 266         if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
 267                 tu = p2p->max_disc_tu;
 268         if (!dev_disc && tu < 100)
 269                 tu = 100; /* Need to wait in non-device discovery use cases */
 270         if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
 271                 tu = p2p->cfg->max_listen * 1000 / 1024;
 272
 273         if (tu == 0) {
 274                 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
 275                 p2p_set_timeout(p2p, 0, 0);
 276                 return;
 277         }
 278
 279         ies = p2p_build_probe_resp_ies(p2p);
 280         if (ies == NULL)
 281                 return;
 282
 283         p2p->pending_listen_freq = freq;
 284         p2p->pending_listen_sec = 0;
 285         p2p->pending_listen_usec = 1024 * tu;
 286
 287         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
 288                     ies) < 0) {
 289                 p2p_dbg(p2p, "Failed to start listen mode");
 290                 p2p->pending_listen_freq = 0;
 291         }
 292         wpabuf_free(ies);
 293 }
 294
 295
 296 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
 297 {
 298         int freq;
 299         struct wpabuf *ies;
 300
 301         p2p_dbg(p2p, "Going to listen(only) state");
 302
 303         if (p2p->pending_listen_freq) {
 304                 /* We have a pending p2p_listen request */
 305                 p2p_dbg(p2p, "p2p_listen command pending already");
 306                 return -1;
 307         }
 308
 309         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 310         if (freq < 0) {
 311                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 312                 return -1;
 313         }
 314
 315         p2p->pending_listen_sec = timeout / 1000;
 316         p2p->pending_listen_usec = (timeout % 1000) * 1000;
 317
 318         if (p2p->p2p_scan_running) {
 319                 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
 320                         p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
 321                         return 0;
 322                 }
 323                 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
 324                 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
 325                 return 0;
 326         }
 327
 328         ies = p2p_build_probe_resp_ies(p2p);
 329         if (ies == NULL)
 330                 return -1;
 331
 332         p2p->pending_listen_freq = freq;
 333
 334         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
 335                 p2p_dbg(p2p, "Failed to start listen mode");
 336                 p2p->pending_listen_freq = 0;
 337                 wpabuf_free(ies);
 338                 return -1;
 339         }
 340         wpabuf_free(ies);
 341
 342         p2p_set_state(p2p, P2P_LISTEN_ONLY);
 343
 344         return 0;
 345 }
 346
 347
 348 static void p2p_device_clear_reported(struct p2p_data *p2p)
 349 {
 350         struct p2p_device *dev;
 351         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 352                 dev->flags &= ~P2P_DEV_REPORTED;
 353                 dev->sd_reqs = 0;
 354         }
 355 }
 356
 357
 358 /**
 359  * p2p_get_device - Fetch a peer entry
 360  * @p2p: P2P module context from p2p_init()
 361  * @addr: P2P Device Address of the peer
 362  * Returns: Pointer to the device entry or %NULL if not found
 363  */
 364 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
 365 {
 366         struct p2p_device *dev;
 367         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 368                 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
 369                         return dev;
 370         }
 371         return NULL;
 372 }
 373
 374
 375 /**
 376  * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
 377  * @p2p: P2P module context from p2p_init()
 378  * @addr: P2P Interface Address of the peer
 379  * Returns: Pointer to the device entry or %NULL if not found
 380  */
 381 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
 382                                              const u8 *addr)
 383 {
 384         struct p2p_device *dev;
 385         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 386                 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
 387                         return dev;
 388         }
 389         return NULL;
 390 }
 391
 392
 393 /**
 394  * p2p_create_device - Create a peer entry
 395  * @p2p: P2P module context from p2p_init()
 396  * @addr: P2P Device Address of the peer
 397  * Returns: Pointer to the device entry or %NULL on failure
 398  *
 399  * If there is already an entry for the peer, it will be returned instead of
 400  * creating a new one.
 401  */
 402 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
 403                                              const u8 *addr)
 404 {
 405         struct p2p_device *dev, *oldest = NULL;
 406         size_t count = 0;
 407
 408         dev = p2p_get_device(p2p, addr);
 409         if (dev)
 410                 return dev;
 411
 412         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 413                 count++;
 414                 if (oldest == NULL ||
 415                     os_reltime_before(&dev->last_seen, &oldest->last_seen))
 416                         oldest = dev;
 417         }
 418         if (count + 1 > p2p->cfg->max_peers && oldest) {
 419                 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
 420                 dl_list_del(&oldest->list);
 421                 p2p_device_free(p2p, oldest);
 422         }
 423
 424         dev = os_zalloc(sizeof(*dev));
 425         if (dev == NULL)
 426                 return NULL;
 427         dl_list_add(&p2p->devices, &dev->list);
 428         os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
 429
 430         return dev;
 431 }
 432
 433
 434 static void p2p_copy_client_info(struct p2p_device *dev,
 435                                  struct p2p_client_info *cli)
 436 {
 437         os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
 438         dev->info.device_name[cli->dev_name_len] = '\0';
 439         dev->info.dev_capab = cli->dev_capab;
 440         dev->info.config_methods = cli->config_methods;
 441         os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
 442         dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
 443         os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
 444                   dev->info.wps_sec_dev_type_list_len);
 445 }
 446
 447
 448 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
 449                                  const u8 *go_interface_addr, int freq,
 450                                  const u8 *gi, size_t gi_len)
 451 {
 452         struct p2p_group_info info;
 453         size_t c;
 454         struct p2p_device *dev;
 455
 456         if (gi == NULL)
 457                 return 0;
 458
 459         if (p2p_group_info_parse(gi, gi_len, &info) < 0)
 460                 return -1;
 461
 462         /*
 463          * Clear old data for this group; if the devices are still in the
 464          * group, the information will be restored in the loop following this.
 465          */
 466         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 467                 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
 468                               ETH_ALEN) == 0) {
 469                         os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
 470                         os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
 471                 }
 472         }
 473
 474         for (c = 0; c < info.num_clients; c++) {
 475                 struct p2p_client_info *cli = &info.client[c];
 476                 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
 477                               ETH_ALEN) == 0)
 478                         continue; /* ignore our own entry */
 479                 dev = p2p_get_device(p2p, cli->p2p_device_addr);
 480                 if (dev) {
 481                         if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
 482                                           P2P_DEV_PROBE_REQ_ONLY)) {
 483                                 /*
 484                                  * Update information since we have not
 485                                  * received this directly from the client.
 486                                  */
 487                                 p2p_copy_client_info(dev, cli);
 488                         } else {
 489                                 /*
 490                                  * Need to update P2P Client Discoverability
 491                                  * flag since it is valid only in P2P Group
 492                                  * Info attribute.
 493                                  */
 494                                 dev->info.dev_capab &=
 495                                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 496                                 dev->info.dev_capab |=
 497                                         cli->dev_capab &
 498                                         P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 499                         }
 500                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
 501                                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
 502                         }
 503                 } else {
 504                         dev = p2p_create_device(p2p, cli->p2p_device_addr);
 505                         if (dev == NULL)
 506                                 continue;
 507                         dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
 508                         p2p_copy_client_info(dev, cli);
 509                         dev->oper_freq = freq;
 510                         p2p->cfg->dev_found(p2p->cfg->cb_ctx,
 511                                             dev->info.p2p_device_addr,
 512                                             &dev->info, 1);
 513                         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 514                 }
 515
 516                 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
 517                           ETH_ALEN);
 518                 os_get_reltime(&dev->last_seen);
 519                 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
 520                 os_memcpy(dev->member_in_go_iface, go_interface_addr,
 521                           ETH_ALEN);
 522         }
 523
 524         return 0;
 525 }
 526
 527
 528 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
 529                               int probe_req, const struct p2p_message *msg)
 530 {
 531         os_memcpy(dev->info.device_name, msg->device_name,
 532                   sizeof(dev->info.device_name));
 533
 534         if (msg->manufacturer &&
 535             msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
 536                 os_memset(dev->info.manufacturer, 0,
 537                           sizeof(dev->info.manufacturer));
 538                 os_memcpy(dev->info.manufacturer, msg->manufacturer,
 539                           msg->manufacturer_len);
 540         }
 541
 542         if (msg->model_name &&
 543             msg->model_name_len < sizeof(dev->info.model_name)) {
 544                 os_memset(dev->info.model_name, 0,
 545                           sizeof(dev->info.model_name));
 546                 os_memcpy(dev->info.model_name, msg->model_name,
 547                           msg->model_name_len);
 548         }
 549
 550         if (msg->model_number &&
 551             msg->model_number_len < sizeof(dev->info.model_number)) {
 552                 os_memset(dev->info.model_number, 0,
 553                           sizeof(dev->info.model_number));
 554                 os_memcpy(dev->info.model_number, msg->model_number,
 555                           msg->model_number_len);
 556         }
 557
 558         if (msg->serial_number &&
 559             msg->serial_number_len < sizeof(dev->info.serial_number)) {
 560                 os_memset(dev->info.serial_number, 0,
 561                           sizeof(dev->info.serial_number));
 562                 os_memcpy(dev->info.serial_number, msg->serial_number,
 563                           msg->serial_number_len);
 564         }
 565
 566         if (msg->pri_dev_type)
 567                 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
 568                           sizeof(dev->info.pri_dev_type));
 569         else if (msg->wps_pri_dev_type)
 570                 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
 571                           sizeof(dev->info.pri_dev_type));
 572
 573         if (msg->wps_sec_dev_type_list) {
 574                 os_memcpy(dev->info.wps_sec_dev_type_list,
 575                           msg->wps_sec_dev_type_list,
 576                           msg->wps_sec_dev_type_list_len);
 577                 dev->info.wps_sec_dev_type_list_len =
 578                         msg->wps_sec_dev_type_list_len;
 579         }
 580
 581         if (msg->capability) {
 582                 /*
 583                  * P2P Client Discoverability bit is reserved in all frames
 584                  * that use this function, so do not change its value here.
 585                  */
 586                 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 587                 dev->info.dev_capab |= msg->capability[0] &
 588                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 589                 dev->info.group_capab = msg->capability[1];
 590         }
 591
 592         if (msg->ext_listen_timing) {
 593                 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
 594                 dev->ext_listen_interval =
 595                         WPA_GET_LE16(msg->ext_listen_timing + 2);
 596         }
 597
 598         if (!probe_req) {
 599                 u16 new_config_methods;
 600                 new_config_methods = msg->config_methods ?
 601                         msg->config_methods : msg->wps_config_methods;
 602                 if (new_config_methods &&
 603                     dev->info.config_methods != new_config_methods) {
 604                         p2p_dbg(p2p, "Update peer " MACSTR
 605                                 " config_methods 0x%x -> 0x%x",
 606                                 MAC2STR(dev->info.p2p_device_addr),
 607                                 dev->info.config_methods,
 608                                 new_config_methods);
 609                         dev->info.config_methods = new_config_methods;
 610                 }
 611         }
 612 }
 613
 614
 615 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies,
 616                                          size_t ies_len)
 617 {
 618         const u8 *pos, *end;
 619         u8 id, len;
 620
 621         wpabuf_free(dev->info.vendor_elems);
 622         dev->info.vendor_elems = NULL;
 623
 624         end = ies + ies_len;
 625
 626         for (pos = ies; pos + 1 < end; pos += len) {
 627                 id = *pos++;
 628                 len = *pos++;
 629
 630                 if (pos + len > end)
 631                         break;
 632
 633                 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3)
 634                         continue;
 635
 636                 if (len >= 4) {
 637                         u32 type = WPA_GET_BE32(pos);
 638
 639                         if (type == WPA_IE_VENDOR_TYPE ||
 640                             type == WMM_IE_VENDOR_TYPE ||
 641                             type == WPS_IE_VENDOR_TYPE ||
 642                             type == P2P_IE_VENDOR_TYPE ||
 643                             type == WFD_IE_VENDOR_TYPE)
 644                                 continue;
 645                 }
 646
 647                 /* Unknown vendor element - make raw IE data available */
 648                 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0)
 649                         break;
 650                 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len);
 651         }
 652 }
 653
 654
 655 static int p2p_compare_wfd_info(struct p2p_device *dev,
 656                               const struct p2p_message *msg)
 657 {
 658         if (dev->info.wfd_subelems && msg->wfd_subelems) {
 659                 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used)
 660                         return 1;
 661
 662                 return os_memcmp(dev->info.wfd_subelems->buf,
 663                                  msg->wfd_subelems->buf,
 664                                  dev->info.wfd_subelems->used);
 665         }
 666         if (dev->info.wfd_subelems || msg->wfd_subelems)
 667                 return 1;
 668
 669         return 0;
 670 }
 671
 672
 673 /**
 674  * p2p_add_device - Add peer entries based on scan results or P2P frames
 675  * @p2p: P2P module context from p2p_init()
 676  * @addr: Source address of Beacon or Probe Response frame (may be either
 677  *      P2P Device Address or P2P Interface Address)
 678  * @level: Signal level (signal strength of the received frame from the peer)
 679  * @freq: Frequency on which the Beacon or Probe Response frame was received
 680  * @rx_time: Time when the result was received
 681  * @ies: IEs from the Beacon or Probe Response frame
 682  * @ies_len: Length of ies buffer in octets
 683  * @scan_res: Whether this was based on scan results
 684  * Returns: 0 on success, -1 on failure
 685  *
 686  * If the scan result is for a GO, the clients in the group will also be added
 687  * to the peer table. This function can also be used with some other frames
 688  * like Provision Discovery Request that contains P2P Capability and P2P Device
 689  * Info attributes.
 690  */
 691 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
 692                    struct os_reltime *rx_time, int level, const u8 *ies,
 693                    size_t ies_len, int scan_res)
 694 {
 695         struct p2p_device *dev;
 696         struct p2p_message msg;
 697         const u8 *p2p_dev_addr;
 698         int wfd_changed;
 699         int i;
 700         struct os_reltime time_now;
 701
 702         os_memset(&msg, 0, sizeof(msg));
 703         if (p2p_parse_ies(ies, ies_len, &msg)) {
 704                 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
 705                 p2p_parse_free(&msg);
 706                 return -1;
 707         }
 708
 709         if (msg.p2p_device_addr)
 710                 p2p_dev_addr = msg.p2p_device_addr;
 711         else if (msg.device_id)
 712                 p2p_dev_addr = msg.device_id;
 713         else {
 714                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
 715                 p2p_parse_free(&msg);
 716                 return -1;
 717         }
 718
 719         if (!is_zero_ether_addr(p2p->peer_filter) &&
 720             os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
 721                 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
 722                         " due to peer filter", MAC2STR(p2p_dev_addr));
 723                 p2p_parse_free(&msg);
 724                 return 0;
 725         }
 726
 727         dev = p2p_create_device(p2p, p2p_dev_addr);
 728         if (dev == NULL) {
 729                 p2p_parse_free(&msg);
 730                 return -1;
 731         }
 732
 733         if (rx_time == NULL) {
 734                 os_get_reltime(&time_now);
 735                 rx_time = &time_now;
 736         }
 737
 738         /*
 739          * Update the device entry only if the new peer
 740          * entry is newer than the one previously stored.
 741          */
 742         if (dev->last_seen.sec > 0 &&
 743             os_reltime_before(rx_time, &dev->last_seen)) {
 744                 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)",
 745                         (unsigned int) rx_time->sec,
 746                         (unsigned int) rx_time->usec,
 747                         (unsigned int) dev->last_seen.sec,
 748                         (unsigned int) dev->last_seen.usec);
 749                 p2p_parse_free(&msg);
 750                 return -1;
 751         }
 752
 753         os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
 754
 755         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
 756
 757         if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
 758                 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
 759         if (msg.ssid &&
 760             (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
 761              os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
 762              != 0)) {
 763                 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
 764                 dev->oper_ssid_len = msg.ssid[1];
 765         }
 766
 767         if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
 768             *msg.ds_params >= 1 && *msg.ds_params <= 14) {
 769                 int ds_freq;
 770                 if (*msg.ds_params == 14)
 771                         ds_freq = 2484;
 772                 else
 773                         ds_freq = 2407 + *msg.ds_params * 5;
 774                 if (freq != ds_freq) {
 775                         p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
 776                                 freq, ds_freq);
 777                         freq = ds_freq;
 778                 }
 779         }
 780
 781         if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
 782                 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
 783                         MACSTR " %d -> %d MHz (DS param %d)",
 784                         MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
 785                         freq, msg.ds_params ? *msg.ds_params : -1);
 786         }
 787         if (scan_res) {
 788                 dev->listen_freq = freq;
 789                 if (msg.group_info)
 790                         dev->oper_freq = freq;
 791         }
 792         dev->info.level = level;
 793
 794         p2p_copy_wps_info(p2p, dev, 0, &msg);
 795
 796         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 797                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 798                 dev->info.wps_vendor_ext[i] = NULL;
 799         }
 800
 801         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 802                 if (msg.wps_vendor_ext[i] == NULL)
 803                         break;
 804                 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
 805                         msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
 806                 if (dev->info.wps_vendor_ext[i] == NULL)
 807                         break;
 808         }
 809
 810         wfd_changed = p2p_compare_wfd_info(dev, &msg);
 811
 812         if (msg.wfd_subelems) {
 813                 wpabuf_free(dev->info.wfd_subelems);
 814                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
 815         }
 816
 817         if (scan_res) {
 818                 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
 819                                       msg.group_info, msg.group_info_len);
 820         }
 821
 822         p2p_parse_free(&msg);
 823
 824         p2p_update_peer_vendor_elems(dev, ies, ies_len);
 825
 826         if (dev->flags & P2P_DEV_REPORTED && !wfd_changed)
 827                 return 0;
 828
 829         p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
 830                 freq, (unsigned int) rx_time->sec,
 831                 (unsigned int) rx_time->usec);
 832         if (dev->flags & P2P_DEV_USER_REJECTED) {
 833                 p2p_dbg(p2p, "Do not report rejected device");
 834                 return 0;
 835         }
 836
 837         if (dev->info.config_methods == 0 &&
 838             (freq == 2412 || freq == 2437 || freq == 2462)) {
 839                 /*
 840                  * If we have only seen a Beacon frame from a GO, we do not yet
 841                  * know what WPS config methods it supports. Since some
 842                  * applications use config_methods value from P2P-DEVICE-FOUND
 843                  * events, postpone reporting this peer until we've fully
 844                  * discovered its capabilities.
 845                  *
 846                  * At least for now, do this only if the peer was detected on
 847                  * one of the social channels since that peer can be easily be
 848                  * found again and there are no limitations of having to use
 849                  * passive scan on this channels, so this can be done through
 850                  * Probe Response frame that includes the config_methods
 851                  * information.
 852                  */
 853                 p2p_dbg(p2p, "Do not report peer " MACSTR
 854                         " with unknown config methods", MAC2STR(addr));
 855                 return 0;
 856         }
 857
 858         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
 859                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
 860         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 861
 862         return 0;
 863 }
 864
 865
 866 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
 867 {
 868         int i;
 869
 870         if (p2p->go_neg_peer == dev) {
 871                 /*
 872                  * If GO Negotiation is in progress, report that it has failed.
 873                  */
 874                 p2p_go_neg_failed(p2p, -1);
 875         }
 876         if (p2p->invite_peer == dev)
 877                 p2p->invite_peer = NULL;
 878         if (p2p->sd_peer == dev)
 879                 p2p->sd_peer = NULL;
 880         if (p2p->pending_client_disc_go == dev)
 881                 p2p->pending_client_disc_go = NULL;
 882
 883         /* dev_lost() device, but only if it was previously dev_found() */
 884         if (dev->flags & P2P_DEV_REPORTED_ONCE)
 885                 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
 886                                    dev->info.p2p_device_addr);
 887
 888         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 889                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 890                 dev->info.wps_vendor_ext[i] = NULL;
 891         }
 892
 893         wpabuf_free(dev->info.wfd_subelems);
 894         wpabuf_free(dev->info.vendor_elems);
 895         wpabuf_free(dev->go_neg_conf);
 896
 897         os_free(dev);
 898 }
 899
 900
 901 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
 902 {
 903         struct p2p_channels *c;
 904         struct p2p_reg_class *cla;
 905         size_t cl, ch;
 906         int found = 0;
 907         u8 reg_class;
 908         u8 channel;
 909         int freq;
 910
 911         c = &p2p->cfg->channels;
 912         for (cl = 0; cl < c->reg_classes; cl++) {
 913                 cla = &c->reg_class[cl];
 914                 if (cla->reg_class != p2p->last_prog_scan_class)
 915                         continue;
 916                 for (ch = 0; ch < cla->channels; ch++) {
 917                         if (cla->channel[ch] == p2p->last_prog_scan_chan) {
 918                                 found = 1;
 919                                 break;
 920                         }
 921                 }
 922                 if (found)
 923                         break;
 924         }
 925
 926         if (!found) {
 927                 /* Start from beginning */
 928                 reg_class = c->reg_class[0].reg_class;
 929                 channel = c->reg_class[0].channel[0];
 930         } else {
 931                 /* Pick the next channel */
 932                 ch++;
 933                 if (ch == cla->channels) {
 934                         cl++;
 935                         if (cl == c->reg_classes)
 936                                 cl = 0;
 937                         ch = 0;
 938                 }
 939                 reg_class = c->reg_class[cl].reg_class;
 940                 channel = c->reg_class[cl].channel[ch];
 941         }
 942
 943         freq = p2p_channel_to_freq(reg_class, channel);
 944         p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
 945                 reg_class, channel, freq);
 946         p2p->last_prog_scan_class = reg_class;
 947         p2p->last_prog_scan_chan = channel;
 948
 949         if (freq == 2412 || freq == 2437 || freq == 2462)
 950                 return 0; /* No need to add social channels */
 951         return freq;
 952 }
 953
 954
 955 static void p2p_search(struct p2p_data *p2p)
 956 {
 957         int freq = 0;
 958         enum p2p_scan_type type;
 959         u16 pw_id = DEV_PW_DEFAULT;
 960         int res;
 961
 962         if (p2p->drv_in_listen) {
 963                 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
 964                 return;
 965         }
 966         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
 967
 968         if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
 969             (freq = p2p_get_next_prog_freq(p2p)) > 0) {
 970                 type = P2P_SCAN_SOCIAL_PLUS_ONE;
 971                 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
 972         } else {
 973                 type = P2P_SCAN_SOCIAL;
 974                 p2p_dbg(p2p, "Starting search");
 975         }
 976
 977         res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
 978                                  p2p->num_req_dev_types, p2p->req_dev_types,
 979                                  p2p->find_dev_id, pw_id);
 980         if (res < 0) {
 981                 p2p_dbg(p2p, "Scan request failed");
 982                 p2p_continue_find(p2p);
 983         } else {
 984                 p2p_dbg(p2p, "Running p2p_scan");
 985                 p2p->p2p_scan_running = 1;
 986                 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
 987                 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
 988                                        p2p, NULL);
 989         }
 990 }
 991
 992
 993 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
 994 {
 995         struct p2p_data *p2p = eloop_ctx;
 996         p2p_dbg(p2p, "Find timeout -> stop");
 997         p2p_stop_find(p2p);
 998 }
 999
1000
1001 static int p2p_run_after_scan(struct p2p_data *p2p)
1002 {
1003         struct p2p_device *dev;
1004         enum p2p_after_scan op;
1005
1006         if (p2p->after_scan_tx) {
1007                 p2p->after_scan_tx_in_progress = 1;
1008                 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
1009                 p2p->cfg->send_action(p2p->cfg->cb_ctx,
1010                                       p2p->after_scan_tx->freq,
1011                                       p2p->after_scan_tx->dst,
1012                                       p2p->after_scan_tx->src,
1013                                       p2p->after_scan_tx->bssid,
1014                                       (u8 *) (p2p->after_scan_tx + 1),
1015                                       p2p->after_scan_tx->len,
1016                                       p2p->after_scan_tx->wait_time);
1017                 os_free(p2p->after_scan_tx);
1018                 p2p->after_scan_tx = NULL;
1019                 return 1;
1020         }
1021
1022         op = p2p->start_after_scan;
1023         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1024         switch (op) {
1025         case P2P_AFTER_SCAN_NOTHING:
1026                 break;
1027         case P2P_AFTER_SCAN_LISTEN:
1028                 p2p_dbg(p2p, "Start previously requested Listen state");
1029                 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
1030                            p2p->pending_listen_usec / 1000);
1031                 return 1;
1032         case P2P_AFTER_SCAN_CONNECT:
1033                 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
1034                         MAC2STR(p2p->after_scan_peer));
1035                 dev = p2p_get_device(p2p, p2p->after_scan_peer);
1036                 if (dev == NULL) {
1037                         p2p_dbg(p2p, "Peer not known anymore");
1038                         break;
1039                 }
1040                 p2p_connect_send(p2p, dev);
1041                 return 1;
1042         }
1043
1044         return 0;
1045 }
1046
1047
1048 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1049 {
1050         struct p2p_data *p2p = eloop_ctx;
1051         int running;
1052         p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
1053         running = p2p->p2p_scan_running;
1054         /* Make sure we recover from missed scan results callback */
1055         p2p->p2p_scan_running = 0;
1056
1057         if (running)
1058                 p2p_run_after_scan(p2p);
1059 }
1060
1061
1062 static void p2p_free_req_dev_types(struct p2p_data *p2p)
1063 {
1064         p2p->num_req_dev_types = 0;
1065         os_free(p2p->req_dev_types);
1066         p2p->req_dev_types = NULL;
1067 }
1068
1069
1070 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
1071              enum p2p_discovery_type type,
1072              unsigned int num_req_dev_types, const u8 *req_dev_types,
1073              const u8 *dev_id, unsigned int search_delay)
1074 {
1075         int res;
1076
1077         p2p_dbg(p2p, "Starting find (type=%d)", type);
1078         os_get_reltime(&p2p->find_start);
1079         if (p2p->p2p_scan_running) {
1080                 p2p_dbg(p2p, "p2p_scan is already running");
1081         }
1082
1083         p2p_free_req_dev_types(p2p);
1084         if (req_dev_types && num_req_dev_types) {
1085                 p2p->req_dev_types = os_malloc(num_req_dev_types *
1086                                                WPS_DEV_TYPE_LEN);
1087                 if (p2p->req_dev_types == NULL)
1088                         return -1;
1089                 os_memcpy(p2p->req_dev_types, req_dev_types,
1090                           num_req_dev_types * WPS_DEV_TYPE_LEN);
1091                 p2p->num_req_dev_types = num_req_dev_types;
1092         }
1093
1094         if (dev_id) {
1095                 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1096                 p2p->find_dev_id = p2p->find_dev_id_buf;
1097         } else
1098                 p2p->find_dev_id = NULL;
1099
1100         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1101         p2p_clear_timeout(p2p);
1102         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1103         p2p->find_type = type;
1104         p2p_device_clear_reported(p2p);
1105         p2p_set_state(p2p, P2P_SEARCH);
1106         p2p->search_delay = search_delay;
1107         p2p->in_search_delay = 0;
1108         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1109         p2p->last_p2p_find_timeout = timeout;
1110         if (timeout)
1111                 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1112                                        p2p, NULL);
1113         switch (type) {
1114         case P2P_FIND_START_WITH_FULL:
1115         case P2P_FIND_PROGRESSIVE:
1116                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1117                                          p2p->num_req_dev_types,
1118                                          p2p->req_dev_types, dev_id,
1119                                          DEV_PW_DEFAULT);
1120                 break;
1121         case P2P_FIND_ONLY_SOCIAL:
1122                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1123                                          p2p->num_req_dev_types,
1124                                          p2p->req_dev_types, dev_id,
1125                                          DEV_PW_DEFAULT);
1126                 break;
1127         default:
1128                 return -1;
1129         }
1130
1131         if (res == 0) {
1132                 p2p_dbg(p2p, "Running p2p_scan");
1133                 p2p->p2p_scan_running = 1;
1134                 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1135                 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1136                                        p2p, NULL);
1137         } else if (p2p->p2p_scan_running) {
1138                 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
1139                 /* wait for the previous p2p_scan to complete */
1140                 res = 0; /* do not report failure */
1141         } else {
1142                 p2p_dbg(p2p, "Failed to start p2p_scan");
1143                 p2p_set_state(p2p, P2P_IDLE);
1144                 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1145         }
1146
1147         return res;
1148 }
1149
1150
1151 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1152 {
1153         p2p_dbg(p2p, "Stopping find");
1154         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1155         p2p_clear_timeout(p2p);
1156         if (p2p->state == P2P_SEARCH)
1157                 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1158         p2p_set_state(p2p, P2P_IDLE);
1159         p2p_free_req_dev_types(p2p);
1160         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1161         if (p2p->go_neg_peer)
1162                 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1163         p2p->go_neg_peer = NULL;
1164         p2p->sd_peer = NULL;
1165         p2p->invite_peer = NULL;
1166         p2p_stop_listen_for_freq(p2p, freq);
1167 }
1168
1169
1170 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1171 {
1172         if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1173                 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1174                 return;
1175         }
1176         if (p2p->in_listen) {
1177                 p2p->in_listen = 0;
1178                 p2p_clear_timeout(p2p);
1179         }
1180         if (p2p->drv_in_listen) {
1181                 /*
1182                  * The driver may not deliver callback to p2p_listen_end()
1183                  * when the operation gets canceled, so clear the internal
1184                  * variable that is tracking driver state.
1185                  */
1186                 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1187                 p2p->drv_in_listen = 0;
1188         }
1189         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1190 }
1191
1192
1193 void p2p_stop_listen(struct p2p_data *p2p)
1194 {
1195         if (p2p->state != P2P_LISTEN_ONLY) {
1196                 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1197                 return;
1198         }
1199
1200         p2p_stop_listen_for_freq(p2p, 0);
1201         p2p_set_state(p2p, P2P_IDLE);
1202 }
1203
1204
1205 void p2p_stop_find(struct p2p_data *p2p)
1206 {
1207         p2p->pending_listen_freq = 0;
1208         p2p_stop_find_for_freq(p2p, 0);
1209 }
1210
1211
1212 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1213                                     unsigned int force_freq,
1214                                     unsigned int pref_freq, int go)
1215 {
1216         u8 op_class, op_channel;
1217         unsigned int freq = force_freq ? force_freq : pref_freq;
1218
1219         p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
1220                 force_freq, pref_freq, go);
1221         if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1222                 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1223                 return -1;
1224         }
1225
1226         if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
1227             (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
1228                                           op_channel))) {
1229                 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1230                         freq, op_class, op_channel);
1231                 return -1;
1232         }
1233
1234         p2p->op_reg_class = op_class;
1235         p2p->op_channel = op_channel;
1236
1237         if (force_freq) {
1238                 p2p->channels.reg_classes = 1;
1239                 p2p->channels.reg_class[0].channels = 1;
1240                 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1241                 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1242         } else {
1243                 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1244                           sizeof(struct p2p_channels));
1245         }
1246
1247         return 0;
1248 }
1249
1250
1251 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1252 {
1253         u8 op_class, op_channel;
1254         const int op_classes_5ghz[] = { 124, 115, 0 };
1255         const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
1256         const int op_classes_vht[] = { 128, 0 };
1257
1258         p2p_dbg(p2p, "Prepare channel best");
1259
1260         if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1261             p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1262             p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1263             == 0) {
1264                 p2p_dbg(p2p, "Select best overall channel as operating channel preference");
1265                 p2p->op_reg_class = op_class;
1266                 p2p->op_channel = op_channel;
1267         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1268                    p2p_supported_freq(p2p, p2p->best_freq_5) &&
1269                    p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1270                    == 0) {
1271                 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1272                 p2p->op_reg_class = op_class;
1273                 p2p->op_channel = op_channel;
1274         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1275                    p2p_supported_freq(p2p, p2p->best_freq_24) &&
1276                    p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1277                                        &op_channel) == 0) {
1278                 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1279                 p2p->op_reg_class = op_class;
1280                 p2p->op_channel = op_channel;
1281         } else if (p2p->cfg->num_pref_chan > 0 &&
1282                    p2p_channels_includes(&p2p->cfg->channels,
1283                                          p2p->cfg->pref_chan[0].op_class,
1284                                          p2p->cfg->pref_chan[0].chan)) {
1285                 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1286                 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1287                 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1288         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
1289                                       &p2p->op_reg_class, &p2p->op_channel) ==
1290                    0) {
1291                 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
1292                         p2p->op_reg_class, p2p->op_channel);
1293         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
1294                                       &p2p->op_reg_class, &p2p->op_channel) ==
1295                    0) {
1296                 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
1297                         p2p->op_reg_class, p2p->op_channel);
1298         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
1299                                       &p2p->op_reg_class, &p2p->op_channel) ==
1300                    0) {
1301                 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
1302                         p2p->op_reg_class, p2p->op_channel);
1303         } else if (p2p_channels_includes(&p2p->cfg->channels,
1304                                          p2p->cfg->op_reg_class,
1305                                          p2p->cfg->op_channel)) {
1306                 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1307                 p2p->op_reg_class = p2p->cfg->op_reg_class;
1308                 p2p->op_channel = p2p->cfg->op_channel;
1309         } else if (p2p_channel_random_social(&p2p->cfg->channels,
1310                                              &p2p->op_reg_class,
1311                                              &p2p->op_channel) == 0) {
1312                 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference",
1313                         p2p->op_reg_class, p2p->op_channel);
1314         } else {
1315                 /* Select any random available channel from the first available
1316                  * operating class */
1317                 p2p_channel_select(&p2p->cfg->channels, NULL,
1318                                    &p2p->op_reg_class,
1319                                    &p2p->op_channel);
1320                 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
1321                         p2p->op_channel, p2p->op_reg_class);
1322         }
1323
1324         os_memcpy(&p2p->channels, &p2p->cfg->channels,
1325                   sizeof(struct p2p_channels));
1326 }
1327
1328
1329 /**
1330  * p2p_prepare_channel - Select operating channel for GO Negotiation
1331  * @p2p: P2P module context from p2p_init()
1332  * @dev: Selected peer device
1333  * @force_freq: Forced frequency in MHz or 0 if not forced
1334  * @pref_freq: Preferred frequency in MHz or 0 if no preference
1335  * @go: Whether the local end will be forced to be GO
1336  * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1337  *
1338  * This function is used to do initial operating channel selection for GO
1339  * Negotiation prior to having received peer information. The selected channel
1340  * may be further optimized in p2p_reselect_channel() once the peer information
1341  * is available.
1342  */
1343 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1344                         unsigned int force_freq, unsigned int pref_freq, int go)
1345 {
1346         p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1347                 force_freq, pref_freq, go);
1348         if (force_freq || pref_freq) {
1349                 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1350                     0)
1351                         return -1;
1352         } else {
1353                 p2p_prepare_channel_best(p2p);
1354         }
1355         p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1356         if (go)
1357                 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1358         else if (!force_freq)
1359                 p2p_channels_union(&p2p->channels, &p2p->cfg->cli_channels,
1360                                    &p2p->channels);
1361         p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1362
1363         p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1364                 p2p->op_reg_class, p2p->op_channel,
1365                 force_freq ? " (forced)" : "");
1366
1367         if (force_freq)
1368                 dev->flags |= P2P_DEV_FORCE_FREQ;
1369         else
1370                 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1371
1372         return 0;
1373 }
1374
1375
1376 static void p2p_set_dev_persistent(struct p2p_device *dev,
1377                                    int persistent_group)
1378 {
1379         switch (persistent_group) {
1380         case 0:
1381                 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1382                                 P2P_DEV_PREFER_PERSISTENT_RECONN);
1383                 break;
1384         case 1:
1385                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1386                 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1387                 break;
1388         case 2:
1389                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1390                         P2P_DEV_PREFER_PERSISTENT_RECONN;
1391                 break;
1392         }
1393 }
1394
1395
1396 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1397                 enum p2p_wps_method wps_method,
1398                 int go_intent, const u8 *own_interface_addr,
1399                 unsigned int force_freq, int persistent_group,
1400                 const u8 *force_ssid, size_t force_ssid_len,
1401                 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1402 {
1403         struct p2p_device *dev;
1404
1405         p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1406                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1407                 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1408                 "oob_pw_id=%u",
1409                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1410                 wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
1411
1412         dev = p2p_get_device(p2p, peer_addr);
1413         if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1414                 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1415                         MAC2STR(peer_addr));
1416                 return -1;
1417         }
1418
1419         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1420                                 go_intent == 15) < 0)
1421                 return -1;
1422
1423         if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1424                 if (!(dev->info.dev_capab &
1425                       P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1426                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1427                                 " that is in a group and is not discoverable",
1428                                 MAC2STR(peer_addr));
1429                         return -1;
1430                 }
1431                 if (dev->oper_freq <= 0) {
1432                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1433                                 " with incomplete information",
1434                                 MAC2STR(peer_addr));
1435                         return -1;
1436                 }
1437
1438                 /*
1439                  * First, try to connect directly. If the peer does not
1440                  * acknowledge frames, assume it is sleeping and use device
1441                  * discoverability via the GO at that point.
1442                  */
1443         }
1444
1445         p2p->ssid_set = 0;
1446         if (force_ssid) {
1447                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1448                                   force_ssid, force_ssid_len);
1449                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1450                 p2p->ssid_len = force_ssid_len;
1451                 p2p->ssid_set = 1;
1452         }
1453
1454         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1455         dev->flags &= ~P2P_DEV_USER_REJECTED;
1456         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1457         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1458         if (pd_before_go_neg)
1459                 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1460         else {
1461                 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1462                 /*
1463                  * Assign dialog token and tie breaker here to use the same
1464                  * values in each retry within the same GO Negotiation exchange.
1465                  */
1466                 dev->dialog_token++;
1467                 if (dev->dialog_token == 0)
1468                         dev->dialog_token = 1;
1469                 dev->tie_breaker = p2p->next_tie_breaker;
1470                 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1471         }
1472         dev->connect_reqs = 0;
1473         dev->go_neg_req_sent = 0;
1474         dev->go_state = UNKNOWN_GO;
1475         p2p_set_dev_persistent(dev, persistent_group);
1476         p2p->go_intent = go_intent;
1477         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1478
1479         if (p2p->state != P2P_IDLE)
1480                 p2p_stop_find(p2p);
1481
1482         if (p2p->after_scan_tx) {
1483                 /*
1484                  * We need to drop the pending frame to avoid issues with the
1485                  * new GO Negotiation, e.g., when the pending frame was from a
1486                  * previous attempt at starting a GO Negotiation.
1487                  */
1488                 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1489                 os_free(p2p->after_scan_tx);
1490                 p2p->after_scan_tx = NULL;
1491         }
1492
1493         dev->wps_method = wps_method;
1494         dev->oob_pw_id = oob_pw_id;
1495         dev->status = P2P_SC_SUCCESS;
1496
1497         if (p2p->p2p_scan_running) {
1498                 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1499                 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1500                 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1501                 return 0;
1502         }
1503         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1504
1505         return p2p_connect_send(p2p, dev);
1506 }
1507
1508
1509 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1510                   enum p2p_wps_method wps_method,
1511                   int go_intent, const u8 *own_interface_addr,
1512                   unsigned int force_freq, int persistent_group,
1513                   const u8 *force_ssid, size_t force_ssid_len,
1514                   unsigned int pref_freq, u16 oob_pw_id)
1515 {
1516         struct p2p_device *dev;
1517
1518         p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1519                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1520                 " wps_method=%d  persistent_group=%d oob_pw_id=%u",
1521                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1522                 wps_method, persistent_group, oob_pw_id);
1523
1524         dev = p2p_get_device(p2p, peer_addr);
1525         if (dev == NULL) {
1526                 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1527                         MAC2STR(peer_addr));
1528                 return -1;
1529         }
1530
1531         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1532                                 15) < 0)
1533                 return -1;
1534
1535         p2p->ssid_set = 0;
1536         if (force_ssid) {
1537                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1538                                   force_ssid, force_ssid_len);
1539                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1540                 p2p->ssid_len = force_ssid_len;
1541                 p2p->ssid_set = 1;
1542         }
1543
1544         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1545         dev->flags &= ~P2P_DEV_USER_REJECTED;
1546         dev->go_neg_req_sent = 0;
1547         dev->go_state = UNKNOWN_GO;
1548         p2p_set_dev_persistent(dev, persistent_group);
1549         p2p->go_intent = go_intent;
1550         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1551
1552         dev->wps_method = wps_method;
1553         dev->oob_pw_id = oob_pw_id;
1554         dev->status = P2P_SC_SUCCESS;
1555
1556         return 0;
1557 }
1558
1559
1560 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1561                       struct p2p_device *dev, struct p2p_message *msg)
1562 {
1563         os_get_reltime(&dev->last_seen);
1564
1565         p2p_copy_wps_info(p2p, dev, 0, msg);
1566
1567         if (msg->listen_channel) {
1568                 int freq;
1569                 freq = p2p_channel_to_freq(msg->listen_channel[3],
1570                                            msg->listen_channel[4]);
1571                 if (freq < 0) {
1572                         p2p_dbg(p2p, "Unknown peer Listen channel: "
1573                                 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1574                                 msg->listen_channel[0],
1575                                 msg->listen_channel[1],
1576                                 msg->listen_channel[2],
1577                                 msg->listen_channel[3],
1578                                 msg->listen_channel[4]);
1579                 } else {
1580                         p2p_dbg(p2p, "Update peer " MACSTR
1581                                 " Listen channel: %u -> %u MHz",
1582                                 MAC2STR(dev->info.p2p_device_addr),
1583                                 dev->listen_freq, freq);
1584                         dev->listen_freq = freq;
1585                 }
1586         }
1587
1588         if (msg->wfd_subelems) {
1589                 wpabuf_free(dev->info.wfd_subelems);
1590                 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1591         }
1592
1593         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1594                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1595                 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1596         } else {
1597                 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1598                         MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1599                         "listen_freq=%d",
1600                         MAC2STR(dev->info.p2p_device_addr),
1601                         dev->info.dev_capab, dev->info.group_capab,
1602                         dev->info.device_name, dev->listen_freq);
1603         }
1604
1605         dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1606
1607         if (dev->flags & P2P_DEV_USER_REJECTED) {
1608                 p2p_dbg(p2p, "Do not report rejected device");
1609                 return;
1610         }
1611
1612         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1613                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
1614         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1615 }
1616
1617
1618 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1619 {
1620         os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1621         p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1622         os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1623                   p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1624         *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1625 }
1626
1627
1628 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1629 {
1630         p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
1631         p2p_random(params->passphrase, p2p->cfg->passphrase_len);
1632         return 0;
1633 }
1634
1635
1636 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1637 {
1638         struct p2p_go_neg_results res;
1639         int go = peer->go_state == LOCAL_GO;
1640         struct p2p_channels intersection;
1641
1642         p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1643                 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1644
1645         os_memset(&res, 0, sizeof(res));
1646         res.role_go = go;
1647         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1648         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1649         res.wps_method = peer->wps_method;
1650         if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1651                 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1652                         res.persistent_group = 2;
1653                 else
1654                         res.persistent_group = 1;
1655         }
1656
1657         if (go) {
1658                 /* Setup AP mode for WPS provisioning */
1659                 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1660                                                p2p->op_channel);
1661                 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1662                 res.ssid_len = p2p->ssid_len;
1663                 p2p_random(res.passphrase, p2p->cfg->passphrase_len);
1664         } else {
1665                 res.freq = peer->oper_freq;
1666                 if (p2p->ssid_len) {
1667                         os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1668                         res.ssid_len = p2p->ssid_len;
1669                 }
1670         }
1671
1672         p2p_channels_dump(p2p, "own channels", &p2p->channels);
1673         p2p_channels_dump(p2p, "peer channels", &peer->channels);
1674         p2p_channels_intersect(&p2p->channels, &peer->channels,
1675                                &intersection);
1676         if (go) {
1677                 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1678                 p2p_channels_dump(p2p, "intersection after no-GO removal",
1679                                   &intersection);
1680         }
1681
1682         p2p_channels_to_freqs(&intersection, res.freq_list,
1683                               P2P_MAX_CHANNELS);
1684
1685         res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1686
1687         p2p_clear_timeout(p2p);
1688         p2p->ssid_set = 0;
1689         peer->go_neg_req_sent = 0;
1690         peer->wps_method = WPS_NOT_READY;
1691         peer->oob_pw_id = 0;
1692         wpabuf_free(peer->go_neg_conf);
1693         peer->go_neg_conf = NULL;
1694
1695         p2p_set_state(p2p, P2P_PROVISIONING);
1696         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1697 }
1698
1699
1700 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1701                               const u8 *data, size_t len, int rx_freq)
1702 {
1703         p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1704         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1705
1706         if (len < 1)
1707                 return;
1708
1709         switch (data[0]) {
1710         case P2P_GO_NEG_REQ:
1711                 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1712                 break;
1713         case P2P_GO_NEG_RESP:
1714                 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1715                 break;
1716         case P2P_GO_NEG_CONF:
1717                 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1718                 break;
1719         case P2P_INVITATION_REQ:
1720                 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1721                                            rx_freq);
1722                 break;
1723         case P2P_INVITATION_RESP:
1724                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
1725                 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1726                 break;
1727         case P2P_PROV_DISC_REQ:
1728                 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1729                 break;
1730         case P2P_PROV_DISC_RESP:
1731                 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1732                 break;
1733         case P2P_DEV_DISC_REQ:
1734                 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1735                 break;
1736         case P2P_DEV_DISC_RESP:
1737                 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1738                 break;
1739         default:
1740                 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1741                         data[0]);
1742                 break;
1743         }
1744 }
1745
1746
1747 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1748                                  const u8 *sa, const u8 *bssid, const u8 *data,
1749                                  size_t len, int freq)
1750 {
1751         if (len < 1)
1752                 return;
1753
1754         switch (data[0]) {
1755         case WLAN_PA_VENDOR_SPECIFIC:
1756                 data++;
1757                 len--;
1758                 if (len < 4)
1759                         return;
1760                 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1761                         return;
1762
1763                 data += 4;
1764                 len -= 4;
1765
1766                 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1767                 break;
1768         case WLAN_PA_GAS_INITIAL_REQ:
1769                 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1770                 break;
1771         case WLAN_PA_GAS_INITIAL_RESP:
1772                 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1773                 break;
1774         case WLAN_PA_GAS_COMEBACK_REQ:
1775                 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1776                 break;
1777         case WLAN_PA_GAS_COMEBACK_RESP:
1778                 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1779                 break;
1780         }
1781 }
1782
1783
1784 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1785                    const u8 *bssid, u8 category,
1786                    const u8 *data, size_t len, int freq)
1787 {
1788         if (category == WLAN_ACTION_PUBLIC) {
1789                 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1790                 return;
1791         }
1792
1793         if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1794                 return;
1795
1796         if (len < 4)
1797                 return;
1798
1799         if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1800                 return;
1801         data += 4;
1802         len -= 4;
1803
1804         /* P2P action frame */
1805         p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1806         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1807
1808         if (len < 1)
1809                 return;
1810         switch (data[0]) {
1811         case P2P_NOA:
1812                 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1813                 /* TODO */
1814                 break;
1815         case P2P_PRESENCE_REQ:
1816                 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1817                 break;
1818         case P2P_PRESENCE_RESP:
1819                 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1820                 break;
1821         case P2P_GO_DISC_REQ:
1822                 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1823                 break;
1824         default:
1825                 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1826                 break;
1827         }
1828 }
1829
1830
1831 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1832 {
1833         struct p2p_data *p2p = eloop_ctx;
1834         if (p2p->go_neg_peer == NULL)
1835                 return;
1836         if (p2p->pending_listen_freq) {
1837                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start");
1838                 p2p->pending_listen_freq = 0;
1839         }
1840         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1841         p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1842         /*
1843          * Set new timeout to make sure a previously set one does not expire
1844          * too quickly while waiting for the GO Negotiation to complete.
1845          */
1846         p2p_set_timeout(p2p, 0, 500000);
1847         p2p_connect_send(p2p, p2p->go_neg_peer);
1848 }
1849
1850
1851 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1852 {
1853         struct p2p_data *p2p = eloop_ctx;
1854         if (p2p->invite_peer == NULL)
1855                 return;
1856         if (p2p->pending_listen_freq) {
1857                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start");
1858                 p2p->pending_listen_freq = 0;
1859         }
1860         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1861         p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
1862                         p2p->invite_dev_pw_id);
1863 }
1864
1865
1866 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1867                                        const u8 *ie, size_t ie_len)
1868 {
1869         struct p2p_message msg;
1870         struct p2p_device *dev;
1871
1872         os_memset(&msg, 0, sizeof(msg));
1873         if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1874         {
1875                 p2p_parse_free(&msg);
1876                 return; /* not a P2P probe */
1877         }
1878
1879         if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
1880             os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
1881             != 0) {
1882                 /* The Probe Request is not part of P2P Device Discovery. It is
1883                  * not known whether the source address of the frame is the P2P
1884                  * Device Address or P2P Interface Address. Do not add a new
1885                  * peer entry based on this frames.
1886                  */
1887                 p2p_parse_free(&msg);
1888                 return;
1889         }
1890
1891         dev = p2p_get_device(p2p, addr);
1892         if (dev) {
1893                 if (dev->country[0] == 0 && msg.listen_channel)
1894                         os_memcpy(dev->country, msg.listen_channel, 3);
1895                 os_get_reltime(&dev->last_seen);
1896                 p2p_parse_free(&msg);
1897                 return; /* already known */
1898         }
1899
1900         dev = p2p_create_device(p2p, addr);
1901         if (dev == NULL) {
1902                 p2p_parse_free(&msg);
1903                 return;
1904         }
1905
1906         os_get_reltime(&dev->last_seen);
1907         dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
1908
1909         if (msg.listen_channel) {
1910                 os_memcpy(dev->country, msg.listen_channel, 3);
1911                 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
1912                                                        msg.listen_channel[4]);
1913         }
1914
1915         p2p_copy_wps_info(p2p, dev, 1, &msg);
1916
1917         if (msg.wfd_subelems) {
1918                 wpabuf_free(dev->info.wfd_subelems);
1919                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
1920         }
1921
1922         p2p_parse_free(&msg);
1923
1924         p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
1925                 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
1926                 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
1927                 dev->info.group_capab, dev->info.device_name,
1928                 dev->listen_freq);
1929 }
1930
1931
1932 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
1933                                                 const u8 *addr,
1934                                                 struct p2p_message *msg)
1935 {
1936         struct p2p_device *dev;
1937
1938         dev = p2p_get_device(p2p, addr);
1939         if (dev) {
1940                 os_get_reltime(&dev->last_seen);
1941                 return dev; /* already known */
1942         }
1943
1944         dev = p2p_create_device(p2p, addr);
1945         if (dev == NULL)
1946                 return NULL;
1947
1948         p2p_add_dev_info(p2p, addr, dev, msg);
1949
1950         return dev;
1951 }
1952
1953
1954 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
1955 {
1956         if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
1957                 return 1;
1958         if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
1959             WPA_GET_BE32(&req_dev_type[2]) == 0 &&
1960             WPA_GET_BE16(&req_dev_type[6]) == 0)
1961                 return 1; /* Category match with wildcard OUI/sub-category */
1962         return 0;
1963 }
1964
1965
1966 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
1967                         size_t num_req_dev_type)
1968 {
1969         size_t i;
1970         for (i = 0; i < num_req_dev_type; i++) {
1971                 if (dev_type_match(dev_type, req_dev_type[i]))
1972                         return 1;
1973         }
1974         return 0;
1975 }
1976
1977
1978 /**
1979  * p2p_match_dev_type - Match local device type with requested type
1980  * @p2p: P2P module context from p2p_init()
1981  * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
1982  * Returns: 1 on match, 0 on mismatch
1983  *
1984  * This function can be used to match the Requested Device Type attribute in
1985  * WPS IE with the local device types for deciding whether to reply to a Probe
1986  * Request frame.
1987  */
1988 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
1989 {
1990         struct wps_parse_attr attr;
1991         size_t i;
1992
1993         if (wps_parse_msg(wps, &attr))
1994                 return 1; /* assume no Requested Device Type attributes */
1995
1996         if (attr.num_req_dev_type == 0)
1997                 return 1; /* no Requested Device Type attributes -> match */
1998
1999         if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
2000                                 attr.num_req_dev_type))
2001                 return 1; /* Own Primary Device Type matches */
2002
2003         for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) {
2004                 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
2005                                         attr.req_dev_type,
2006                                         attr.num_req_dev_type))
2007                         return 1; /* Own Secondary Device Type matches */
2008         }
2009
2010         /* No matching device type found */
2011         return 0;
2012 }
2013
2014
2015 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
2016 {
2017         struct wpabuf *buf;
2018         u8 *len;
2019         int pw_id = -1;
2020         size_t extra = 0;
2021
2022 #ifdef CONFIG_WIFI_DISPLAY
2023         if (p2p->wfd_ie_probe_resp)
2024                 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
2025 #endif /* CONFIG_WIFI_DISPLAY */
2026
2027         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2028                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2029
2030         buf = wpabuf_alloc(1000 + extra);
2031         if (buf == NULL)
2032                 return NULL;
2033
2034         if (p2p->go_neg_peer) {
2035                 /* Advertise immediate availability of WPS credential */
2036                 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
2037         }
2038
2039         if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
2040                 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
2041                 wpabuf_free(buf);
2042                 return NULL;
2043         }
2044
2045 #ifdef CONFIG_WIFI_DISPLAY
2046         if (p2p->wfd_ie_probe_resp)
2047                 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
2048 #endif /* CONFIG_WIFI_DISPLAY */
2049
2050         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2051                 wpabuf_put_buf(buf,
2052                                p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2053
2054         /* P2P IE */
2055         len = p2p_buf_add_ie_hdr(buf);
2056         p2p_buf_add_capability(buf, p2p->dev_capab &
2057                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2058         if (p2p->ext_listen_interval)
2059                 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
2060                                               p2p->ext_listen_interval);
2061         p2p_buf_add_device_info(buf, p2p, NULL);
2062         p2p_buf_update_ie_hdr(buf, len);
2063
2064         return buf;
2065 }
2066
2067
2068 static enum p2p_probe_req_status
2069 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2070                 const u8 *bssid, const u8 *ie, size_t ie_len)
2071 {
2072         struct ieee802_11_elems elems;
2073         struct wpabuf *buf;
2074         struct ieee80211_mgmt *resp;
2075         struct p2p_message msg;
2076         struct wpabuf *ies;
2077
2078         if (!p2p->in_listen || !p2p->drv_in_listen) {
2079                 /* not in Listen state - ignore Probe Request */
2080                 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
2081                         p2p->in_listen, p2p->drv_in_listen);
2082                 return P2P_PREQ_NOT_LISTEN;
2083         }
2084
2085         if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
2086             ParseFailed) {
2087                 /* Ignore invalid Probe Request frames */
2088                 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
2089                 return P2P_PREQ_MALFORMED;
2090         }
2091
2092         if (elems.p2p == NULL) {
2093                 /* not a P2P probe - ignore it */
2094                 p2p_dbg(p2p, "Not a P2P probe - ignore it");
2095                 return P2P_PREQ_NOT_P2P;
2096         }
2097
2098         if (dst && !is_broadcast_ether_addr(dst) &&
2099             os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2100                 /* Not sent to the broadcast address or our P2P Device Address
2101                  */
2102                 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2103                         MAC2STR(dst));
2104                 return P2P_PREQ_NOT_PROCESSED;
2105         }
2106
2107         if (bssid && !is_broadcast_ether_addr(bssid)) {
2108                 /* Not sent to the Wildcard BSSID */
2109                 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2110                         MAC2STR(bssid));
2111                 return P2P_PREQ_NOT_PROCESSED;
2112         }
2113
2114         if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2115             os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2116             0) {
2117                 /* not using P2P Wildcard SSID - ignore */
2118                 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2119                 return P2P_PREQ_NOT_PROCESSED;
2120         }
2121
2122         if (supp_rates_11b_only(&elems)) {
2123                 /* Indicates support for 11b rates only */
2124                 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2125                 return P2P_PREQ_NOT_P2P;
2126         }
2127
2128         os_memset(&msg, 0, sizeof(msg));
2129         if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2130                 /* Could not parse P2P attributes */
2131                 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2132                 return P2P_PREQ_NOT_P2P;
2133         }
2134
2135         if (msg.device_id &&
2136             os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2137                 /* Device ID did not match */
2138                 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2139                         MAC2STR(msg.device_id));
2140                 p2p_parse_free(&msg);
2141                 return P2P_PREQ_NOT_PROCESSED;
2142         }
2143
2144         /* Check Requested Device Type match */
2145         if (msg.wps_attributes &&
2146             !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2147                 /* No match with Requested Device Type */
2148                 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2149                 p2p_parse_free(&msg);
2150                 return P2P_PREQ_NOT_PROCESSED;
2151         }
2152         p2p_parse_free(&msg);
2153
2154         if (!p2p->cfg->send_probe_resp) {
2155                 /* Response generated elsewhere */
2156                 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2157                 return P2P_PREQ_NOT_PROCESSED;
2158         }
2159
2160         p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2161
2162         /*
2163          * We do not really have a specific BSS that this frame is advertising,
2164          * so build a frame that has some information in valid format. This is
2165          * really only used for discovery purposes, not to learn exact BSS
2166          * parameters.
2167          */
2168         ies = p2p_build_probe_resp_ies(p2p);
2169         if (ies == NULL)
2170                 return P2P_PREQ_NOT_PROCESSED;
2171
2172         buf = wpabuf_alloc(200 + wpabuf_len(ies));
2173         if (buf == NULL) {
2174                 wpabuf_free(ies);
2175                 return P2P_PREQ_NOT_PROCESSED;
2176         }
2177
2178         resp = NULL;
2179         resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
2180
2181         resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2182                                            (WLAN_FC_STYPE_PROBE_RESP << 4));
2183         os_memcpy(resp->da, addr, ETH_ALEN);
2184         os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2185         os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2186         resp->u.probe_resp.beacon_int = host_to_le16(100);
2187         /* hardware or low-level driver will setup seq_ctrl and timestamp */
2188         resp->u.probe_resp.capab_info =
2189                 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2190                              WLAN_CAPABILITY_PRIVACY |
2191                              WLAN_CAPABILITY_SHORT_SLOT_TIME);
2192
2193         wpabuf_put_u8(buf, WLAN_EID_SSID);
2194         wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2195         wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2196
2197         wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2198         wpabuf_put_u8(buf, 8);
2199         wpabuf_put_u8(buf, (60 / 5) | 0x80);
2200         wpabuf_put_u8(buf, 90 / 5);
2201         wpabuf_put_u8(buf, (120 / 5) | 0x80);
2202         wpabuf_put_u8(buf, 180 / 5);
2203         wpabuf_put_u8(buf, (240 / 5) | 0x80);
2204         wpabuf_put_u8(buf, 360 / 5);
2205         wpabuf_put_u8(buf, 480 / 5);
2206         wpabuf_put_u8(buf, 540 / 5);
2207
2208         wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2209         wpabuf_put_u8(buf, 1);
2210         wpabuf_put_u8(buf, p2p->cfg->channel);
2211
2212         wpabuf_put_buf(buf, ies);
2213         wpabuf_free(ies);
2214
2215         p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
2216
2217         wpabuf_free(buf);
2218
2219         return P2P_PREQ_NOT_PROCESSED;
2220 }
2221
2222
2223 enum p2p_probe_req_status
2224 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2225                  const u8 *bssid, const u8 *ie, size_t ie_len)
2226 {
2227         enum p2p_probe_req_status res;
2228
2229         p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2230
2231         res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
2232
2233         if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2234             p2p->go_neg_peer &&
2235             os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2236             == 0 &&
2237             !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2238                 /* Received a Probe Request from GO Negotiation peer */
2239                 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2240                 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2241                 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2242                 return P2P_PREQ_PROCESSED;
2243         }
2244
2245         if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2246             p2p->invite_peer &&
2247             (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2248             os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2249             == 0) {
2250                 /* Received a Probe Request from Invite peer */
2251                 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2252                 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2253                 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2254                 return P2P_PREQ_PROCESSED;
2255         }
2256
2257         return res;
2258 }
2259
2260
2261 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2262                                     u8 *buf, size_t len, struct wpabuf *p2p_ie)
2263 {
2264         struct wpabuf *tmp;
2265         u8 *lpos;
2266         size_t tmplen;
2267         int res;
2268         u8 group_capab;
2269
2270         if (p2p_ie == NULL)
2271                 return 0; /* WLAN AP is not a P2P manager */
2272
2273         /*
2274          * (Re)Association Request - P2P IE
2275          * P2P Capability attribute (shall be present)
2276          * P2P Interface attribute (present if concurrent device and
2277          *      P2P Management is enabled)
2278          */
2279         tmp = wpabuf_alloc(200);
2280         if (tmp == NULL)
2281                 return -1;
2282
2283         lpos = p2p_buf_add_ie_hdr(tmp);
2284         group_capab = 0;
2285         if (p2p->num_groups > 0) {
2286                 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2287                 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2288                     (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2289                     p2p->cross_connect)
2290                         group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2291         }
2292         p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2293         if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2294             (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2295                 p2p_buf_add_p2p_interface(tmp, p2p);
2296         p2p_buf_update_ie_hdr(tmp, lpos);
2297
2298         tmplen = wpabuf_len(tmp);
2299         if (tmplen > len)
2300                 res = -1;
2301         else {
2302                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2303                 res = tmplen;
2304         }
2305         wpabuf_free(tmp);
2306
2307         return res;
2308 }
2309
2310
2311 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2312                      size_t len, int p2p_group, struct wpabuf *p2p_ie)
2313 {
2314         struct wpabuf *tmp;
2315         u8 *lpos;
2316         struct p2p_device *peer;
2317         size_t tmplen;
2318         int res;
2319         size_t extra = 0;
2320
2321         if (!p2p_group)
2322                 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2323
2324 #ifdef CONFIG_WIFI_DISPLAY
2325         if (p2p->wfd_ie_assoc_req)
2326                 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2327 #endif /* CONFIG_WIFI_DISPLAY */
2328
2329         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2330                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2331
2332         /*
2333          * (Re)Association Request - P2P IE
2334          * P2P Capability attribute (shall be present)
2335          * Extended Listen Timing (may be present)
2336          * P2P Device Info attribute (shall be present)
2337          */
2338         tmp = wpabuf_alloc(200 + extra);
2339         if (tmp == NULL)
2340                 return -1;
2341
2342 #ifdef CONFIG_WIFI_DISPLAY
2343         if (p2p->wfd_ie_assoc_req)
2344                 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2345 #endif /* CONFIG_WIFI_DISPLAY */
2346
2347         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2348                 wpabuf_put_buf(tmp,
2349                                p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2350
2351         peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2352
2353         lpos = p2p_buf_add_ie_hdr(tmp);
2354         p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2355         if (p2p->ext_listen_interval)
2356                 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2357                                               p2p->ext_listen_interval);
2358         p2p_buf_add_device_info(tmp, p2p, peer);
2359         p2p_buf_update_ie_hdr(tmp, lpos);
2360
2361         tmplen = wpabuf_len(tmp);
2362         if (tmplen > len)
2363                 res = -1;
2364         else {
2365                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2366                 res = tmplen;
2367         }
2368         wpabuf_free(tmp);
2369
2370         return res;
2371 }
2372
2373
2374 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2375 {
2376         struct wpabuf *p2p_ie;
2377         int ret;
2378
2379         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2380         if (p2p_ie == NULL)
2381                 return 0;
2382
2383         ret = p2p_attr_text(p2p_ie, buf, end);
2384         wpabuf_free(p2p_ie);
2385         return ret;
2386 }
2387
2388
2389 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2390 {
2391         struct p2p_message msg;
2392
2393         os_memset(&msg, 0, sizeof(msg));
2394         if (p2p_parse_p2p_ie(p2p_ie, &msg))
2395                 return -1;
2396
2397         if (msg.p2p_device_addr) {
2398                 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2399                 return 0;
2400         } else if (msg.device_id) {
2401                 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2402                 return 0;
2403         }
2404         return -1;
2405 }
2406
2407
2408 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2409 {
2410         struct wpabuf *p2p_ie;
2411         int ret;
2412
2413         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2414                                              P2P_IE_VENDOR_TYPE);
2415         if (p2p_ie == NULL)
2416                 return -1;
2417         ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2418         wpabuf_free(p2p_ie);
2419         return ret;
2420 }
2421
2422
2423 static void p2p_clear_go_neg(struct p2p_data *p2p)
2424 {
2425         p2p->go_neg_peer = NULL;
2426         p2p_clear_timeout(p2p);
2427         p2p_set_state(p2p, P2P_IDLE);
2428 }
2429
2430
2431 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2432 {
2433         if (p2p->go_neg_peer == NULL) {
2434                 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2435                 return; /* No pending Group Formation */
2436         }
2437
2438         if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2439             0) {
2440                 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2441                         MACSTR " (GO Negotiation peer " MACSTR ")",
2442                         MAC2STR(mac_addr),
2443                         MAC2STR(p2p->go_neg_peer->intended_addr));
2444                 return; /* Ignore unexpected peer address */
2445         }
2446
2447         p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2448                 MAC2STR(mac_addr));
2449
2450         p2p_clear_go_neg(p2p);
2451 }
2452
2453
2454 void p2p_group_formation_failed(struct p2p_data *p2p)
2455 {
2456         if (p2p->go_neg_peer == NULL) {
2457                 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2458                 return; /* No pending Group Formation */
2459         }
2460
2461         p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2462                 MAC2STR(p2p->go_neg_peer->intended_addr));
2463
2464         p2p_clear_go_neg(p2p);
2465 }
2466
2467
2468 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2469 {
2470         struct p2p_data *p2p;
2471
2472         if (cfg->max_peers < 1 ||
2473             cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
2474                 return NULL;
2475
2476         p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2477         if (p2p == NULL)
2478                 return NULL;
2479         p2p->cfg = (struct p2p_config *) (p2p + 1);
2480         os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2481         if (cfg->dev_name)
2482                 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2483         if (cfg->manufacturer)
2484                 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2485         if (cfg->model_name)
2486                 p2p->cfg->model_name = os_strdup(cfg->model_name);
2487         if (cfg->model_number)
2488                 p2p->cfg->model_number = os_strdup(cfg->model_number);
2489         if (cfg->serial_number)
2490                 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2491         if (cfg->pref_chan) {
2492                 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2493                                                 sizeof(struct p2p_channel));
2494                 if (p2p->cfg->pref_chan) {
2495                         os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2496                                   cfg->num_pref_chan *
2497                                   sizeof(struct p2p_channel));
2498                 } else
2499                         p2p->cfg->num_pref_chan = 0;
2500         }
2501
2502         p2p->min_disc_int = 1;
2503         p2p->max_disc_int = 3;
2504         p2p->max_disc_tu = -1;
2505
2506         if (os_get_random(&p2p->next_tie_breaker, 1) < 0)
2507                 p2p->next_tie_breaker = 0;
2508         p2p->next_tie_breaker &= 0x01;
2509         if (cfg->sd_request)
2510                 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2511         p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2512         if (cfg->concurrent_operations)
2513                 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2514         p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2515
2516         dl_list_init(&p2p->devices);
2517
2518         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2519                                p2p_expiration_timeout, p2p, NULL);
2520
2521         p2p->go_timeout = 100;
2522         p2p->client_timeout = 20;
2523         p2p->num_p2p_sd_queries = 0;
2524
2525         p2p_dbg(p2p, "initialized");
2526         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2527         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2528
2529         return p2p;
2530 }
2531
2532
2533 void p2p_deinit(struct p2p_data *p2p)
2534 {
2535 #ifdef CONFIG_WIFI_DISPLAY
2536         wpabuf_free(p2p->wfd_ie_beacon);
2537         wpabuf_free(p2p->wfd_ie_probe_req);
2538         wpabuf_free(p2p->wfd_ie_probe_resp);
2539         wpabuf_free(p2p->wfd_ie_assoc_req);
2540         wpabuf_free(p2p->wfd_ie_invitation);
2541         wpabuf_free(p2p->wfd_ie_prov_disc_req);
2542         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2543         wpabuf_free(p2p->wfd_ie_go_neg);
2544         wpabuf_free(p2p->wfd_dev_info);
2545         wpabuf_free(p2p->wfd_assoc_bssid);
2546         wpabuf_free(p2p->wfd_coupled_sink_info);
2547 #endif /* CONFIG_WIFI_DISPLAY */
2548
2549         eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2550         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2551         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2552         eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2553         eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2554         p2p_flush(p2p);
2555         p2p_free_req_dev_types(p2p);
2556         os_free(p2p->cfg->dev_name);
2557         os_free(p2p->cfg->manufacturer);
2558         os_free(p2p->cfg->model_name);
2559         os_free(p2p->cfg->model_number);
2560         os_free(p2p->cfg->serial_number);
2561         os_free(p2p->cfg->pref_chan);
2562         os_free(p2p->groups);
2563         wpabuf_free(p2p->sd_resp);
2564         os_free(p2p->after_scan_tx);
2565         p2p_remove_wps_vendor_extensions(p2p);
2566         os_free(p2p->no_go_freq.range);
2567         os_free(p2p);
2568 }
2569
2570
2571 void p2p_flush(struct p2p_data *p2p)
2572 {
2573         struct p2p_device *dev, *prev;
2574         p2p_stop_find(p2p);
2575         dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2576                               list) {
2577                 dl_list_del(&dev->list);
2578                 p2p_device_free(p2p, dev);
2579         }
2580         p2p_free_sd_queries(p2p);
2581         os_free(p2p->after_scan_tx);
2582         p2p->after_scan_tx = NULL;
2583 }
2584
2585
2586 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2587 {
2588         struct p2p_device *dev;
2589
2590         dev = p2p_get_device(p2p, addr);
2591         if (dev == NULL)
2592                 return -1;
2593
2594         p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
2595
2596         if (p2p->go_neg_peer == dev) {
2597                 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2598                 p2p->go_neg_peer = NULL;
2599         }
2600
2601         dev->wps_method = WPS_NOT_READY;
2602         dev->oob_pw_id = 0;
2603         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
2604         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
2605
2606         /* Check if after_scan_tx is for this peer. If so free it */
2607         if (p2p->after_scan_tx &&
2608             os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
2609                 os_free(p2p->after_scan_tx);
2610                 p2p->after_scan_tx = NULL;
2611         }
2612
2613         return 0;
2614 }
2615
2616
2617 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
2618 {
2619         os_free(p2p->cfg->dev_name);
2620         if (dev_name) {
2621                 p2p->cfg->dev_name = os_strdup(dev_name);
2622                 if (p2p->cfg->dev_name == NULL)
2623                         return -1;
2624         } else
2625                 p2p->cfg->dev_name = NULL;
2626         return 0;
2627 }
2628
2629
2630 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
2631 {
2632         os_free(p2p->cfg->manufacturer);
2633         p2p->cfg->manufacturer = NULL;
2634         if (manufacturer) {
2635                 p2p->cfg->manufacturer = os_strdup(manufacturer);
2636                 if (p2p->cfg->manufacturer == NULL)
2637                         return -1;
2638         }
2639
2640         return 0;
2641 }
2642
2643
2644 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
2645 {
2646         os_free(p2p->cfg->model_name);
2647         p2p->cfg->model_name = NULL;
2648         if (model_name) {
2649                 p2p->cfg->model_name = os_strdup(model_name);
2650                 if (p2p->cfg->model_name == NULL)
2651                         return -1;
2652         }
2653
2654         return 0;
2655 }
2656
2657
2658 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
2659 {
2660         os_free(p2p->cfg->model_number);
2661         p2p->cfg->model_number = NULL;
2662         if (model_number) {
2663                 p2p->cfg->model_number = os_strdup(model_number);
2664                 if (p2p->cfg->model_number == NULL)
2665                         return -1;
2666         }
2667
2668         return 0;
2669 }
2670
2671
2672 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
2673 {
2674         os_free(p2p->cfg->serial_number);
2675         p2p->cfg->serial_number = NULL;
2676         if (serial_number) {
2677                 p2p->cfg->serial_number = os_strdup(serial_number);
2678                 if (p2p->cfg->serial_number == NULL)
2679                         return -1;
2680         }
2681
2682         return 0;
2683 }
2684
2685
2686 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
2687 {
2688         p2p->cfg->config_methods = config_methods;
2689 }
2690
2691
2692 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
2693 {
2694         os_memcpy(p2p->cfg->uuid, uuid, 16);
2695 }
2696
2697
2698 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
2699 {
2700         os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
2701         return 0;
2702 }
2703
2704
2705 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
2706                           size_t num_dev_types)
2707 {
2708         if (num_dev_types > P2P_SEC_DEVICE_TYPES)
2709                 num_dev_types = P2P_SEC_DEVICE_TYPES;
2710         p2p->cfg->num_sec_dev_types = num_dev_types;
2711         os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
2712         return 0;
2713 }
2714
2715
2716 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
2717 {
2718         int i;
2719
2720         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2721                 wpabuf_free(p2p->wps_vendor_ext[i]);
2722                 p2p->wps_vendor_ext[i] = NULL;
2723         }
2724 }
2725
2726
2727 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
2728                                  const struct wpabuf *vendor_ext)
2729 {
2730         int i;
2731
2732         if (vendor_ext == NULL)
2733                 return -1;
2734
2735         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2736                 if (p2p->wps_vendor_ext[i] == NULL)
2737                         break;
2738         }
2739         if (i >= P2P_MAX_WPS_VENDOR_EXT)
2740                 return -1;
2741
2742         p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
2743         if (p2p->wps_vendor_ext[i] == NULL)
2744                 return -1;
2745
2746         return 0;
2747 }
2748
2749
2750 int p2p_set_country(struct p2p_data *p2p, const char *country)
2751 {
2752         os_memcpy(p2p->cfg->country, country, 3);
2753         return 0;
2754 }
2755
2756
2757 static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev)
2758 {
2759         if (dev->sd_pending_bcast_queries == 0) {
2760                 /* Initialize with total number of registered broadcast
2761                  * SD queries. */
2762                 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
2763         }
2764
2765         if (p2p_start_sd(p2p, dev) == 0)
2766                 return 1;
2767
2768         if (dev->req_config_methods &&
2769             !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
2770                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2771                         MACSTR " (config methods 0x%x)",
2772                         MAC2STR(dev->info.p2p_device_addr),
2773                         dev->req_config_methods);
2774                 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
2775                         return 1;
2776         }
2777
2778         return 0;
2779 }
2780
2781
2782 void p2p_continue_find(struct p2p_data *p2p)
2783 {
2784         struct p2p_device *dev;
2785         int found;
2786
2787         p2p_set_state(p2p, P2P_SEARCH);
2788
2789         /* Continue from the device following the last iteration */
2790         found = 0;
2791         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2792                 if (dev == p2p->last_p2p_find_oper) {
2793                         found = 1;
2794                         continue;
2795                 }
2796                 if (!found)
2797                         continue;
2798                 if (p2p_pre_find_operation(p2p, dev) > 0) {
2799                         p2p->last_p2p_find_oper = dev;
2800                         return;
2801                 }
2802         }
2803
2804         /*
2805          * Wrap around to the beginning of the list and continue until the last
2806          * iteration device.
2807          */
2808         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2809                 if (p2p_pre_find_operation(p2p, dev) > 0) {
2810                         p2p->last_p2p_find_oper = dev;
2811                         return;
2812                 }
2813                 if (dev == p2p->last_p2p_find_oper)
2814                         break;
2815         }
2816
2817         p2p_listen_in_find(p2p, 1);
2818 }
2819
2820
2821 static void p2p_sd_cb(struct p2p_data *p2p, int success)
2822 {
2823         p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
2824                 success);
2825         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2826
2827         if (!success) {
2828                 if (p2p->sd_peer)
2829                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2830                 p2p->sd_peer = NULL;
2831                 p2p_continue_find(p2p);
2832                 return;
2833         }
2834
2835         if (p2p->sd_peer == NULL) {
2836                 p2p_dbg(p2p, "No SD peer entry known");
2837                 p2p_continue_find(p2p);
2838                 return;
2839         }
2840
2841         if (p2p->sd_query->for_all_peers) {
2842                 /* Update the pending broadcast SD query count for this device
2843                  */
2844                 p2p->sd_peer->sd_pending_bcast_queries--;
2845
2846                 /*
2847                  * If there are no pending broadcast queries for this device,
2848                  * mark it as done (-1).
2849                  */
2850                 if (p2p->sd_peer->sd_pending_bcast_queries == 0)
2851                         p2p->sd_peer->sd_pending_bcast_queries = -1;
2852         }
2853
2854         /* Wait for response from the peer */
2855         p2p_set_state(p2p, P2P_SD_DURING_FIND);
2856         p2p_set_timeout(p2p, 0, 200000);
2857 }
2858
2859
2860 /**
2861  * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
2862  * @p2p: P2P module context from p2p_init()
2863  */
2864 static void p2p_retry_pd(struct p2p_data *p2p)
2865 {
2866         struct p2p_device *dev;
2867
2868         if (p2p->state != P2P_IDLE)
2869                 return;
2870
2871         /*
2872          * Retry the prov disc req attempt only for the peer that the user had
2873          * requested.
2874          */
2875
2876         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2877                 if (os_memcmp(p2p->pending_pd_devaddr,
2878                               dev->info.p2p_device_addr, ETH_ALEN) != 0)
2879                         continue;
2880                 if (!dev->req_config_methods)
2881                         continue;
2882
2883                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2884                         MACSTR " (config methods 0x%x)",
2885                         MAC2STR(dev->info.p2p_device_addr),
2886                         dev->req_config_methods);
2887                 p2p_send_prov_disc_req(p2p, dev,
2888                                        dev->flags & P2P_DEV_PD_FOR_JOIN,
2889                                        p2p->pd_force_freq);
2890                 return;
2891         }
2892 }
2893
2894
2895 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
2896 {
2897         p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
2898                 success);
2899
2900         /*
2901          * Postpone resetting the pending action state till after we actually
2902          * time out. This allows us to take some action like notifying any
2903          * interested parties about no response to the request.
2904          *
2905          * When the timer (below) goes off we check in IDLE, SEARCH, or
2906          * LISTEN_ONLY state, which are the only allowed states to issue a PD
2907          * requests in, if this was still pending and then raise notification.
2908          */
2909
2910         if (!success) {
2911                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2912
2913                 if (p2p->user_initiated_pd &&
2914                     (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
2915                 {
2916                         /* Retry request from timeout to avoid busy loops */
2917                         p2p->pending_action_state = P2P_PENDING_PD;
2918                         p2p_set_timeout(p2p, 0, 50000);
2919                 } else if (p2p->state != P2P_IDLE)
2920                         p2p_continue_find(p2p);
2921                 else if (p2p->user_initiated_pd) {
2922                         p2p->pending_action_state = P2P_PENDING_PD;
2923                         p2p_set_timeout(p2p, 0, 300000);
2924                 }
2925                 return;
2926         }
2927
2928         /*
2929          * This postponing, of resetting pending_action_state, needs to be
2930          * done only for user initiated PD requests and not internal ones.
2931          */
2932         if (p2p->user_initiated_pd)
2933                 p2p->pending_action_state = P2P_PENDING_PD;
2934         else
2935                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2936
2937         /* Wait for response from the peer */
2938         if (p2p->state == P2P_SEARCH)
2939                 p2p_set_state(p2p, P2P_PD_DURING_FIND);
2940         p2p_set_timeout(p2p, 0, 200000);
2941 }
2942
2943
2944 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
2945                          struct os_reltime *rx_time, int level, const u8 *ies,
2946                          size_t ies_len)
2947 {
2948         if (os_reltime_before(rx_time, &p2p->find_start)) {
2949                 /*
2950                  * The driver may have cached (e.g., in cfg80211 BSS table) the
2951                  * scan results for relatively long time. To avoid reporting
2952                  * stale information, update P2P peers only based on results
2953                  * that have based on frames received after the last p2p_find
2954                  * operation was started.
2955                  */
2956                 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
2957                         " (rx_time=%u.%06u)",
2958                         MAC2STR(bssid), (unsigned int) rx_time->sec,
2959                         (unsigned int) rx_time->usec);
2960                 return 0;
2961         }
2962
2963         p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
2964
2965         return 0;
2966 }
2967
2968
2969 void p2p_scan_res_handled(struct p2p_data *p2p)
2970 {
2971         if (!p2p->p2p_scan_running) {
2972                 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
2973         }
2974         p2p->p2p_scan_running = 0;
2975         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2976
2977         if (p2p_run_after_scan(p2p))
2978                 return;
2979         if (p2p->state == P2P_SEARCH)
2980                 p2p_continue_find(p2p);
2981 }
2982
2983
2984 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
2985 {
2986         u8 *len;
2987
2988 #ifdef CONFIG_WIFI_DISPLAY
2989         if (p2p->wfd_ie_probe_req)
2990                 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
2991 #endif /* CONFIG_WIFI_DISPLAY */
2992
2993         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
2994                 wpabuf_put_buf(ies,
2995                                p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
2996
2997         len = p2p_buf_add_ie_hdr(ies);
2998         p2p_buf_add_capability(ies, p2p->dev_capab &
2999                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
3000         if (dev_id)
3001                 p2p_buf_add_device_id(ies, dev_id);
3002         if (p2p->cfg->reg_class && p2p->cfg->channel)
3003                 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
3004                                            p2p->cfg->reg_class,
3005                                            p2p->cfg->channel);
3006         if (p2p->ext_listen_interval)
3007                 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
3008                                               p2p->ext_listen_interval);
3009         /* TODO: p2p_buf_add_operating_channel() if GO */
3010         p2p_buf_update_ie_hdr(ies, len);
3011 }
3012
3013
3014 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
3015 {
3016         size_t len = 100;
3017
3018 #ifdef CONFIG_WIFI_DISPLAY
3019         if (p2p && p2p->wfd_ie_probe_req)
3020                 len += wpabuf_len(p2p->wfd_ie_probe_req);
3021 #endif /* CONFIG_WIFI_DISPLAY */
3022
3023         if (p2p && p2p->vendor_elem &&
3024             p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3025                 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3026
3027         return len;
3028 }
3029
3030
3031 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
3032 {
3033         return p2p_attr_text(p2p_ie, buf, end);
3034 }
3035
3036
3037 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
3038 {
3039         struct p2p_device *dev = p2p->go_neg_peer;
3040         int timeout;
3041
3042         p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
3043
3044         if (dev == NULL) {
3045                 p2p_dbg(p2p, "No pending GO Negotiation");
3046                 return;
3047         }
3048
3049         if (success) {
3050                 if (dev->flags & P2P_DEV_USER_REJECTED) {
3051                         p2p_set_state(p2p, P2P_IDLE);
3052                         return;
3053                 }
3054         } else if (dev->go_neg_req_sent) {
3055                 /* Cancel the increment from p2p_connect_send() on failure */
3056                 dev->go_neg_req_sent--;
3057         }
3058
3059         if (!success &&
3060             (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
3061             !is_zero_ether_addr(dev->member_in_go_dev)) {
3062                 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
3063                         MAC2STR(dev->info.p2p_device_addr));
3064                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3065                 p2p_send_dev_disc_req(p2p, dev);
3066                 return;
3067         }
3068
3069         /*
3070          * Use P2P find, if needed, to find the other device from its listen
3071          * channel.
3072          */
3073         p2p_set_state(p2p, P2P_CONNECT);
3074         timeout = success ? 500000 : 100000;
3075         if (!success && p2p->go_neg_peer &&
3076             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
3077                 unsigned int r;
3078                 /*
3079                  * Peer is expected to wait our response and we will skip the
3080                  * listen phase. Add some randomness to the wait time here to
3081                  * make it less likely to hit cases where we could end up in
3082                  * sync with peer not listening.
3083                  */
3084                 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
3085                         r = 0;
3086                 timeout += r % 100000;
3087         }
3088         p2p_set_timeout(p2p, 0, timeout);
3089 }
3090
3091
3092 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
3093 {
3094         p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
3095                 success);
3096         if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
3097                 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
3098                 return;
3099         }
3100         p2p_set_state(p2p, P2P_CONNECT);
3101         p2p_set_timeout(p2p, 0, 500000);
3102 }
3103
3104
3105 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
3106                                        const u8 *addr)
3107 {
3108         p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
3109         if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
3110                 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status);
3111         } else if (success) {
3112                 struct p2p_device *dev;
3113                 dev = p2p_get_device(p2p, addr);
3114                 if (dev &&
3115                     dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
3116                         dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
3117         }
3118 }
3119
3120
3121 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
3122                                enum p2p_send_action_result result)
3123 {
3124         struct p2p_device *dev;
3125
3126         p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
3127         if (result == P2P_SEND_ACTION_FAILED) {
3128                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3129                 p2p_go_neg_failed(p2p, -1);
3130                 return;
3131         }
3132
3133         dev = p2p->go_neg_peer;
3134
3135         if (result == P2P_SEND_ACTION_NO_ACK) {
3136                 /*
3137                  * Retry GO Negotiation Confirmation
3138                  * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
3139                  * ACK for confirmation.
3140                  */
3141                 if (dev && dev->go_neg_conf &&
3142                     dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
3143                         p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
3144                                 dev->go_neg_conf_sent);
3145                         p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
3146                         if (p2p_send_action(p2p, dev->go_neg_conf_freq,
3147                                             dev->info.p2p_device_addr,
3148                                             p2p->cfg->dev_addr,
3149                                             dev->info.p2p_device_addr,
3150                                             wpabuf_head(dev->go_neg_conf),
3151                                             wpabuf_len(dev->go_neg_conf), 0) >=
3152                             0) {
3153                                 dev->go_neg_conf_sent++;
3154                                 return;
3155                         }
3156                         p2p_dbg(p2p, "Failed to re-send Action frame");
3157
3158                         /*
3159                          * Continue with the assumption that the first attempt
3160                          * went through and just the ACK frame was lost.
3161                          */
3162                 }
3163
3164                 /*
3165                  * It looks like the TX status for GO Negotiation Confirm is
3166                  * often showing failure even when the peer has actually
3167                  * received the frame. Since the peer may change channels
3168                  * immediately after having received the frame, we may not see
3169                  * an Ack for retries, so just dropping a single frame may
3170                  * trigger this. To allow the group formation to succeed if the
3171                  * peer did indeed receive the frame, continue regardless of
3172                  * the TX status.
3173                  */
3174                 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
3175         }
3176
3177         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3178
3179         if (dev == NULL)
3180                 return;
3181
3182         p2p_go_complete(p2p, dev);
3183 }
3184
3185
3186 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3187                         const u8 *src, const u8 *bssid,
3188                         enum p2p_send_action_result result)
3189 {
3190         enum p2p_pending_action_state state;
3191         int success;
3192
3193         p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
3194                 " src=" MACSTR " bssid=" MACSTR " result=%d",
3195                 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
3196                 MAC2STR(bssid), result);
3197         success = result == P2P_SEND_ACTION_SUCCESS;
3198         state = p2p->pending_action_state;
3199         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3200         switch (state) {
3201         case P2P_NO_PENDING_ACTION:
3202                 if (p2p->send_action_in_progress) {
3203                         p2p->send_action_in_progress = 0;
3204                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3205                 }
3206                 if (p2p->after_scan_tx_in_progress) {
3207                         p2p->after_scan_tx_in_progress = 0;
3208                         if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
3209                             p2p_run_after_scan(p2p))
3210                                 break;
3211                         if (p2p->state == P2P_SEARCH) {
3212                                 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
3213                                 p2p_continue_find(p2p);
3214                         }
3215                 }
3216                 break;
3217         case P2P_PENDING_GO_NEG_REQUEST:
3218                 p2p_go_neg_req_cb(p2p, success);
3219                 break;
3220         case P2P_PENDING_GO_NEG_RESPONSE:
3221                 p2p_go_neg_resp_cb(p2p, success);
3222                 break;
3223         case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3224                 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3225                 break;
3226         case P2P_PENDING_GO_NEG_CONFIRM:
3227                 p2p_go_neg_conf_cb(p2p, result);
3228                 break;
3229         case P2P_PENDING_SD:
3230                 p2p_sd_cb(p2p, success);
3231                 break;
3232         case P2P_PENDING_PD:
3233                 p2p_prov_disc_cb(p2p, success);
3234                 break;
3235         case P2P_PENDING_INVITATION_REQUEST:
3236                 p2p_invitation_req_cb(p2p, success);
3237                 break;
3238         case P2P_PENDING_INVITATION_RESPONSE:
3239                 p2p_invitation_resp_cb(p2p, success);
3240                 break;
3241         case P2P_PENDING_DEV_DISC_REQUEST:
3242                 p2p_dev_disc_req_cb(p2p, success);
3243                 break;
3244         case P2P_PENDING_DEV_DISC_RESPONSE:
3245                 p2p_dev_disc_resp_cb(p2p, success);
3246                 break;
3247         case P2P_PENDING_GO_DISC_REQ:
3248                 p2p_go_disc_req_cb(p2p, success);
3249                 break;
3250         }
3251
3252         p2p->after_scan_tx_in_progress = 0;
3253 }
3254
3255
3256 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3257                    unsigned int duration)
3258 {
3259         if (freq == p2p->pending_client_disc_freq) {
3260                 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3261                 p2p->pending_client_disc_freq = 0;
3262                 return;
3263         }
3264
3265         if (freq != p2p->pending_listen_freq) {
3266                 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3267                         freq, duration, p2p->pending_listen_freq);
3268                 return;
3269         }
3270
3271         p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3272                 p2p->pending_listen_sec, p2p->pending_listen_usec,
3273                 p2p->pending_listen_freq);
3274         p2p->in_listen = 1;
3275         p2p->drv_in_listen = freq;
3276         if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3277                 /*
3278                  * Add 20 msec extra wait to avoid race condition with driver
3279                  * remain-on-channel end event, i.e., give driver more time to
3280                  * complete the operation before our timeout expires.
3281                  */
3282                 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3283                                 p2p->pending_listen_usec + 20000);
3284         }
3285
3286         p2p->pending_listen_freq = 0;
3287 }
3288
3289
3290 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3291 {
3292         p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3293         p2p->drv_in_listen = 0;
3294         if (p2p->in_listen)
3295                 return 0; /* Internal timeout will trigger the next step */
3296
3297         if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3298                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3299                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3300                         p2p_go_neg_failed(p2p, -1);
3301                         return 0;
3302                 }
3303
3304                 p2p_set_state(p2p, P2P_CONNECT);
3305                 p2p_connect_send(p2p, p2p->go_neg_peer);
3306                 return 1;
3307         } else if (p2p->state == P2P_SEARCH) {
3308                 if (p2p->p2p_scan_running) {
3309                          /*
3310                           * Search is already in progress. This can happen if
3311                           * an Action frame RX is reported immediately after
3312                           * the end of a remain-on-channel operation and the
3313                           * response frame to that is sent using an offchannel
3314                           * operation while in p2p_find. Avoid an attempt to
3315                           * restart a scan here.
3316                           */
3317                         p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3318                         return 1;
3319                 }
3320                 if (p2p->pending_listen_freq) {
3321                         /*
3322                          * Better wait a bit if the driver is unable to start
3323                          * offchannel operation for some reason. p2p_search()
3324                          * will be started from internal timeout.
3325                          */
3326                         p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3327                         p2p_set_timeout(p2p, 0, 100000);
3328                         return 1;
3329                 }
3330                 if (p2p->search_delay) {
3331                         p2p_dbg(p2p, "Delay search operation by %u ms",
3332                                 p2p->search_delay);
3333                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3334                                         (p2p->search_delay % 1000) * 1000);
3335                         return 1;
3336                 }
3337                 p2p_search(p2p);
3338                 return 1;
3339         }
3340
3341         return 0;
3342 }
3343
3344
3345 static void p2p_timeout_connect(struct p2p_data *p2p)
3346 {
3347         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3348         if (p2p->go_neg_peer &&
3349             (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3350                 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3351                 p2p_go_neg_failed(p2p, -1);
3352                 return;
3353         }
3354         if (p2p->go_neg_peer &&
3355             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3356             p2p->go_neg_peer->connect_reqs < 120) {
3357                 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3358                 p2p_connect_send(p2p, p2p->go_neg_peer);
3359                 return;
3360         }
3361         if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3362                 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3363                 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3364                 p2p_set_timeout(p2p, 0, 30000);
3365                 return;
3366         }
3367         p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3368         p2p_listen_in_find(p2p, 0);
3369 }
3370
3371
3372 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3373 {
3374         if (p2p->go_neg_peer) {
3375                 if (p2p->drv_in_listen) {
3376                         p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3377                         return;
3378                 }
3379
3380                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3381                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3382                         p2p_go_neg_failed(p2p, -1);
3383                         return;
3384                 }
3385
3386                 p2p_set_state(p2p, P2P_CONNECT);
3387                 p2p_connect_send(p2p, p2p->go_neg_peer);
3388         } else
3389                 p2p_set_state(p2p, P2P_IDLE);
3390 }
3391
3392
3393 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3394 {
3395         p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3396
3397         if (p2p->cfg->is_concurrent_session_active &&
3398             p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3399                 p2p_set_timeout(p2p, 0, 500000);
3400         else
3401                 p2p_set_timeout(p2p, 0, 200000);
3402 }
3403
3404
3405 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3406 {
3407         struct p2p_device *dev = p2p->go_neg_peer;
3408
3409         if (dev == NULL) {
3410                 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3411                 return;
3412         }
3413
3414         p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3415         p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3416         p2p_listen_in_find(p2p, 0);
3417 }
3418
3419
3420 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3421 {
3422         p2p_dbg(p2p, "Service Discovery Query timeout");
3423         if (p2p->sd_peer) {
3424                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3425                 p2p->sd_peer = NULL;
3426         }
3427         p2p_continue_find(p2p);
3428 }
3429
3430
3431 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3432 {
3433         p2p_dbg(p2p, "Provision Discovery Request timeout");
3434         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3435         p2p_continue_find(p2p);
3436 }
3437
3438
3439 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3440 {
3441         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3442
3443         /*
3444          * For user initiated PD requests that we have not gotten any responses
3445          * for while in IDLE state, we retry them a couple of times before
3446          * giving up.
3447          */
3448         if (!p2p->user_initiated_pd)
3449                 return;
3450
3451         p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3452
3453         if (p2p->pd_retries) {
3454                 p2p->pd_retries--;
3455                 p2p_retry_pd(p2p);
3456         } else {
3457                 struct p2p_device *dev;
3458                 int for_join = 0;
3459
3460                 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3461                         if (os_memcmp(p2p->pending_pd_devaddr,
3462                                       dev->info.p2p_device_addr, ETH_ALEN) != 0)
3463                                 continue;
3464                         if (dev->req_config_methods &&
3465                             (dev->flags & P2P_DEV_PD_FOR_JOIN))
3466                                 for_join = 1;
3467                 }
3468
3469                 if (p2p->cfg->prov_disc_fail)
3470                         p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3471                                                  p2p->pending_pd_devaddr,
3472                                                  for_join ?
3473                                                  P2P_PROV_DISC_TIMEOUT_JOIN :
3474                                                  P2P_PROV_DISC_TIMEOUT);
3475                 p2p_reset_pending_pd(p2p);
3476         }
3477 }
3478
3479
3480 static void p2p_timeout_invite(struct p2p_data *p2p)
3481 {
3482         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3483         p2p_set_state(p2p, P2P_INVITE_LISTEN);
3484         if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3485                 /*
3486                  * Better remain on operating channel instead of listen channel
3487                  * when running a group.
3488                  */
3489                 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
3490                 p2p_set_timeout(p2p, 0, 100000);
3491                 return;
3492         }
3493         p2p_listen_in_find(p2p, 0);
3494 }
3495
3496
3497 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3498 {
3499         if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3500                 p2p_set_state(p2p, P2P_INVITE);
3501                 p2p_invite_send(p2p, p2p->invite_peer,
3502                                 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
3503         } else {
3504                 if (p2p->invite_peer) {
3505                         p2p_dbg(p2p, "Invitation Request retry limit reached");
3506                         if (p2p->cfg->invitation_result)
3507                                 p2p->cfg->invitation_result(
3508                                         p2p->cfg->cb_ctx, -1, NULL, NULL,
3509                                         p2p->invite_peer->info.p2p_device_addr,
3510                                         0, 0);
3511                 }
3512                 p2p_set_state(p2p, P2P_IDLE);
3513         }
3514 }
3515
3516
3517 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3518 {
3519         struct p2p_data *p2p = eloop_ctx;
3520
3521         p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
3522
3523         p2p->in_listen = 0;
3524         if (p2p->drv_in_listen) {
3525                 p2p_dbg(p2p, "Driver is still in listen state - stop it");
3526                 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
3527         }
3528
3529         switch (p2p->state) {
3530         case P2P_IDLE:
3531                 /* Check if we timed out waiting for PD req */
3532                 if (p2p->pending_action_state == P2P_PENDING_PD)
3533                         p2p_timeout_prov_disc_req(p2p);
3534                 break;
3535         case P2P_SEARCH:
3536                 /* Check if we timed out waiting for PD req */
3537                 if (p2p->pending_action_state == P2P_PENDING_PD)
3538                         p2p_timeout_prov_disc_req(p2p);
3539                 if (p2p->search_delay && !p2p->in_search_delay) {
3540                         p2p_dbg(p2p, "Delay search operation by %u ms",
3541                                 p2p->search_delay);
3542                         p2p->in_search_delay = 1;
3543                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3544                                         (p2p->search_delay % 1000) * 1000);
3545                         break;
3546                 }
3547                 p2p->in_search_delay = 0;
3548                 p2p_search(p2p);
3549                 break;
3550         case P2P_CONNECT:
3551                 p2p_timeout_connect(p2p);
3552                 break;
3553         case P2P_CONNECT_LISTEN:
3554                 p2p_timeout_connect_listen(p2p);
3555                 break;
3556         case P2P_GO_NEG:
3557                 break;
3558         case P2P_LISTEN_ONLY:
3559                 /* Check if we timed out waiting for PD req */
3560                 if (p2p->pending_action_state == P2P_PENDING_PD)
3561                         p2p_timeout_prov_disc_req(p2p);
3562
3563                 if (p2p->ext_listen_only) {
3564                         p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
3565                         p2p->ext_listen_only = 0;
3566                         p2p_set_state(p2p, P2P_IDLE);
3567                 }
3568                 break;
3569         case P2P_WAIT_PEER_CONNECT:
3570                 p2p_timeout_wait_peer_connect(p2p);
3571                 break;
3572         case P2P_WAIT_PEER_IDLE:
3573                 p2p_timeout_wait_peer_idle(p2p);
3574                 break;
3575         case P2P_SD_DURING_FIND:
3576                 p2p_timeout_sd_during_find(p2p);
3577                 break;
3578         case P2P_PROVISIONING:
3579                 break;
3580         case P2P_PD_DURING_FIND:
3581                 p2p_timeout_prov_disc_during_find(p2p);
3582                 break;
3583         case P2P_INVITE:
3584                 p2p_timeout_invite(p2p);
3585                 break;
3586         case P2P_INVITE_LISTEN:
3587                 p2p_timeout_invite_listen(p2p);
3588                 break;
3589         }
3590 }
3591
3592
3593 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
3594 {
3595         struct p2p_device *dev;
3596
3597         dev = p2p_get_device(p2p, peer_addr);
3598         p2p_dbg(p2p, "Local request to reject connection attempts by peer "
3599                 MACSTR, MAC2STR(peer_addr));
3600         if (dev == NULL) {
3601                 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
3602                 return -1;
3603         }
3604         dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
3605         dev->flags |= P2P_DEV_USER_REJECTED;
3606         return 0;
3607 }
3608
3609
3610 const char * p2p_wps_method_text(enum p2p_wps_method method)
3611 {
3612         switch (method) {
3613         case WPS_NOT_READY:
3614                 return "not-ready";
3615         case WPS_PIN_DISPLAY:
3616                 return "Display";
3617         case WPS_PIN_KEYPAD:
3618                 return "Keypad";
3619         case WPS_PBC:
3620                 return "PBC";
3621         case WPS_NFC:
3622                 return "NFC";
3623         }
3624
3625         return "??";
3626 }
3627
3628
3629 static const char * p2p_go_state_text(enum p2p_go_state go_state)
3630 {
3631         switch (go_state) {
3632         case UNKNOWN_GO:
3633                 return "unknown";
3634         case LOCAL_GO:
3635                 return "local";
3636         case  REMOTE_GO:
3637                 return "remote";
3638         }
3639
3640         return "??";
3641 }
3642
3643
3644 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
3645                                                const u8 *addr, int next)
3646 {
3647         struct p2p_device *dev;
3648
3649         if (addr)
3650                 dev = p2p_get_device(p2p, addr);
3651         else
3652                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
3653
3654         if (dev && next) {
3655                 dev = dl_list_first(&dev->list, struct p2p_device, list);
3656                 if (&dev->list == &p2p->devices)
3657                         dev = NULL;
3658         }
3659
3660         if (dev == NULL)
3661                 return NULL;
3662
3663         return &dev->info;
3664 }
3665
3666
3667 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
3668                           char *buf, size_t buflen)
3669 {
3670         struct p2p_device *dev;
3671         int res;
3672         char *pos, *end;
3673         struct os_reltime now;
3674
3675         if (info == NULL)
3676                 return -1;
3677
3678         dev = (struct p2p_device *) (((u8 *) info) -
3679                                      offsetof(struct p2p_device, info));
3680
3681         pos = buf;
3682         end = buf + buflen;
3683
3684         os_get_reltime(&now);
3685         res = os_snprintf(pos, end - pos,
3686                           "age=%d\n"
3687                           "listen_freq=%d\n"
3688                           "wps_method=%s\n"
3689                           "interface_addr=" MACSTR "\n"
3690                           "member_in_go_dev=" MACSTR "\n"
3691                           "member_in_go_iface=" MACSTR "\n"
3692                           "go_neg_req_sent=%d\n"
3693                           "go_state=%s\n"
3694                           "dialog_token=%u\n"
3695                           "intended_addr=" MACSTR "\n"
3696                           "country=%c%c\n"
3697                           "oper_freq=%d\n"
3698                           "req_config_methods=0x%x\n"
3699                           "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
3700                           "status=%d\n"
3701                           "invitation_reqs=%u\n",
3702                           (int) (now.sec - dev->last_seen.sec),
3703                           dev->listen_freq,
3704                           p2p_wps_method_text(dev->wps_method),
3705                           MAC2STR(dev->interface_addr),
3706                           MAC2STR(dev->member_in_go_dev),
3707                           MAC2STR(dev->member_in_go_iface),
3708                           dev->go_neg_req_sent,
3709                           p2p_go_state_text(dev->go_state),
3710                           dev->dialog_token,
3711                           MAC2STR(dev->intended_addr),
3712                           dev->country[0] ? dev->country[0] : '_',
3713                           dev->country[1] ? dev->country[1] : '_',
3714                           dev->oper_freq,
3715                           dev->req_config_methods,
3716                           dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
3717                           "[PROBE_REQ_ONLY]" : "",
3718                           dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
3719                           dev->flags & P2P_DEV_NOT_YET_READY ?
3720                           "[NOT_YET_READY]" : "",
3721                           dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
3722                           "[PD_PEER_DISPLAY]" : "",
3723                           dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
3724                           "[PD_PEER_KEYPAD]" : "",
3725                           dev->flags & P2P_DEV_USER_REJECTED ?
3726                           "[USER_REJECTED]" : "",
3727                           dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
3728                           "[PEER_WAITING_RESPONSE]" : "",
3729                           dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
3730                           "[PREFER_PERSISTENT_GROUP]" : "",
3731                           dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
3732                           "[WAIT_GO_NEG_RESPONSE]" : "",
3733                           dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
3734                           "[WAIT_GO_NEG_CONFIRM]" : "",
3735                           dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
3736                           "[GROUP_CLIENT_ONLY]" : "",
3737                           dev->flags & P2P_DEV_FORCE_FREQ ?
3738                           "[FORCE_FREQ]" : "",
3739                           dev->flags & P2P_DEV_PD_FOR_JOIN ?
3740                           "[PD_FOR_JOIN]" : "",
3741                           dev->status,
3742                           dev->invitation_reqs);
3743         if (res < 0 || res >= end - pos)
3744                 return pos - buf;
3745         pos += res;
3746
3747         if (dev->ext_listen_period) {
3748                 res = os_snprintf(pos, end - pos,
3749                                   "ext_listen_period=%u\n"
3750                                   "ext_listen_interval=%u\n",
3751                                   dev->ext_listen_period,
3752                                   dev->ext_listen_interval);
3753                 if (res < 0 || res >= end - pos)
3754                         return pos - buf;
3755                 pos += res;
3756         }
3757
3758         if (dev->oper_ssid_len) {
3759                 res = os_snprintf(pos, end - pos,
3760                                   "oper_ssid=%s\n",
3761                                   wpa_ssid_txt(dev->oper_ssid,
3762                                                dev->oper_ssid_len));
3763                 if (res < 0 || res >= end - pos)
3764                         return pos - buf;
3765                 pos += res;
3766         }
3767
3768 #ifdef CONFIG_WIFI_DISPLAY
3769         if (dev->info.wfd_subelems) {
3770                 res = os_snprintf(pos, end - pos, "wfd_subelems=");
3771                 if (res < 0 || res >= end - pos)
3772                         return pos - buf;
3773                 pos += res;
3774
3775                 pos += wpa_snprintf_hex(pos, end - pos,
3776                                         wpabuf_head(dev->info.wfd_subelems),
3777                                         wpabuf_len(dev->info.wfd_subelems));
3778
3779                 res = os_snprintf(pos, end - pos, "\n");
3780                 if (res < 0 || res >= end - pos)
3781                         return pos - buf;
3782                 pos += res;
3783         }
3784 #endif /* CONFIG_WIFI_DISPLAY */
3785
3786         return pos - buf;
3787 }
3788
3789
3790 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
3791 {
3792         return p2p_get_device(p2p, addr) != NULL;
3793 }
3794
3795
3796 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
3797 {
3798         if (enabled) {
3799                 p2p_dbg(p2p, "Client discoverability enabled");
3800                 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3801         } else {
3802                 p2p_dbg(p2p, "Client discoverability disabled");
3803                 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3804         }
3805 }
3806
3807
3808 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
3809                                               u32 duration2, u32 interval2)
3810 {
3811         struct wpabuf *req;
3812         struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
3813         u8 *len;
3814
3815         req = wpabuf_alloc(100);
3816         if (req == NULL)
3817                 return NULL;
3818
3819         if (duration1 || interval1) {
3820                 os_memset(&desc1, 0, sizeof(desc1));
3821                 desc1.count_type = 1;
3822                 desc1.duration = duration1;
3823                 desc1.interval = interval1;
3824                 ptr1 = &desc1;
3825
3826                 if (duration2 || interval2) {
3827                         os_memset(&desc2, 0, sizeof(desc2));
3828                         desc2.count_type = 2;
3829                         desc2.duration = duration2;
3830                         desc2.interval = interval2;
3831                         ptr2 = &desc2;
3832                 }
3833         }
3834
3835         p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
3836         len = p2p_buf_add_ie_hdr(req);
3837         p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
3838         p2p_buf_update_ie_hdr(req, len);
3839
3840         return req;
3841 }
3842
3843
3844 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
3845                      const u8 *own_interface_addr, unsigned int freq,
3846                      u32 duration1, u32 interval1, u32 duration2,
3847                      u32 interval2)
3848 {
3849         struct wpabuf *req;
3850
3851         p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
3852                 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
3853                 "dur2=%u int2=%u",
3854                 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
3855                 freq, duration1, interval1, duration2, interval2);
3856
3857         req = p2p_build_presence_req(duration1, interval1, duration2,
3858                                      interval2);
3859         if (req == NULL)
3860                 return -1;
3861
3862         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3863         if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
3864                             go_interface_addr,
3865                             wpabuf_head(req), wpabuf_len(req), 200) < 0) {
3866                 p2p_dbg(p2p, "Failed to send Action frame");
3867         }
3868         wpabuf_free(req);
3869
3870         return 0;
3871 }
3872
3873
3874 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
3875                                                size_t noa_len, u8 dialog_token)
3876 {
3877         struct wpabuf *resp;
3878         u8 *len;
3879
3880         resp = wpabuf_alloc(100 + noa_len);
3881         if (resp == NULL)
3882                 return NULL;
3883
3884         p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
3885         len = p2p_buf_add_ie_hdr(resp);
3886         p2p_buf_add_status(resp, status);
3887         if (noa) {
3888                 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
3889                 wpabuf_put_le16(resp, noa_len);
3890                 wpabuf_put_data(resp, noa, noa_len);
3891         } else
3892                 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
3893         p2p_buf_update_ie_hdr(resp, len);
3894
3895         return resp;
3896 }
3897
3898
3899 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
3900                                      const u8 *sa, const u8 *data, size_t len,
3901                                      int rx_freq)
3902 {
3903         struct p2p_message msg;
3904         u8 status;
3905         struct wpabuf *resp;
3906         size_t g;
3907         struct p2p_group *group = NULL;
3908         int parsed = 0;
3909         u8 noa[50];
3910         int noa_len;
3911
3912         p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
3913
3914         for (g = 0; g < p2p->num_groups; g++) {
3915                 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
3916                               ETH_ALEN) == 0) {
3917                         group = p2p->groups[g];
3918                         break;
3919                 }
3920         }
3921         if (group == NULL) {
3922                 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
3923                         MACSTR, MAC2STR(da));
3924                 return;
3925         }
3926
3927         if (p2p_parse(data, len, &msg) < 0) {
3928                 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
3929                 status = P2P_SC_FAIL_INVALID_PARAMS;
3930                 goto fail;
3931         }
3932         parsed = 1;
3933
3934         if (msg.noa == NULL) {
3935                 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
3936                 status = P2P_SC_FAIL_INVALID_PARAMS;
3937                 goto fail;
3938         }
3939
3940         status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
3941
3942 fail:
3943         if (p2p->cfg->get_noa)
3944                 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
3945                                             sizeof(noa));
3946         else
3947                 noa_len = -1;
3948         resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
3949                                        noa_len > 0 ? noa_len : 0,
3950                                        msg.dialog_token);
3951         if (parsed)
3952                 p2p_parse_free(&msg);
3953         if (resp == NULL)
3954                 return;
3955
3956         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3957         if (p2p_send_action(p2p, rx_freq, sa, da, da,
3958                             wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
3959                 p2p_dbg(p2p, "Failed to send Action frame");
3960         }
3961         wpabuf_free(resp);
3962 }
3963
3964
3965 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
3966                                       const u8 *sa, const u8 *data, size_t len)
3967 {
3968         struct p2p_message msg;
3969
3970         p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
3971
3972         if (p2p_parse(data, len, &msg) < 0) {
3973                 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
3974                 return;
3975         }
3976
3977         if (msg.status == NULL || msg.noa == NULL) {
3978                 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
3979                 p2p_parse_free(&msg);
3980                 return;
3981         }
3982
3983         if (p2p->cfg->presence_resp) {
3984                 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
3985                                         msg.noa, msg.noa_len);
3986         }
3987
3988         if (*msg.status) {
3989                 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
3990                         *msg.status);
3991                 p2p_parse_free(&msg);
3992                 return;
3993         }
3994
3995         p2p_dbg(p2p, "P2P Presence Request was accepted");
3996         wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
3997                     msg.noa, msg.noa_len);
3998         /* TODO: process NoA */
3999         p2p_parse_free(&msg);
4000 }
4001
4002
4003 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
4004 {
4005         struct p2p_data *p2p = eloop_ctx;
4006
4007         if (p2p->ext_listen_interval) {
4008                 /* Schedule next extended listen timeout */
4009                 eloop_register_timeout(p2p->ext_listen_interval_sec,
4010                                        p2p->ext_listen_interval_usec,
4011                                        p2p_ext_listen_timeout, p2p, NULL);
4012         }
4013
4014         if ((p2p->cfg->is_p2p_in_progress &&
4015              p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
4016             (p2p->pending_action_state == P2P_PENDING_PD &&
4017              p2p->pd_retries > 0)) {
4018                 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
4019                         p2p_state_txt(p2p->state));
4020                 return;
4021         }
4022
4023         if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
4024                 /*
4025                  * This should not really happen, but it looks like the Listen
4026                  * command may fail is something else (e.g., a scan) was
4027                  * running at an inconvenient time. As a workaround, allow new
4028                  * Extended Listen operation to be started.
4029                  */
4030                 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
4031                 p2p->ext_listen_only = 0;
4032                 p2p_set_state(p2p, P2P_IDLE);
4033         }
4034
4035         if (p2p->state != P2P_IDLE) {
4036                 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
4037                 return;
4038         }
4039
4040         p2p_dbg(p2p, "Extended Listen timeout");
4041         p2p->ext_listen_only = 1;
4042         if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
4043                 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
4044                 p2p->ext_listen_only = 0;
4045         }
4046 }
4047
4048
4049 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
4050                    unsigned int interval)
4051 {
4052         if (period > 65535 || interval > 65535 || period > interval ||
4053             (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
4054                 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
4055                         period, interval);
4056                 return -1;
4057         }
4058
4059         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
4060
4061         if (interval == 0) {
4062                 p2p_dbg(p2p, "Disabling Extended Listen Timing");
4063                 p2p->ext_listen_period = 0;
4064                 p2p->ext_listen_interval = 0;
4065                 return 0;
4066         }
4067
4068         p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
4069                 period, interval);
4070         p2p->ext_listen_period = period;
4071         p2p->ext_listen_interval = interval;
4072         p2p->ext_listen_interval_sec = interval / 1000;
4073         p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
4074
4075         eloop_register_timeout(p2p->ext_listen_interval_sec,
4076                                p2p->ext_listen_interval_usec,
4077                                p2p_ext_listen_timeout, p2p, NULL);
4078
4079         return 0;
4080 }
4081
4082
4083 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4084                       const u8 *ie, size_t ie_len)
4085 {
4086         struct p2p_message msg;
4087
4088         if (bssid == NULL || ie == NULL)
4089                 return;
4090
4091         os_memset(&msg, 0, sizeof(msg));
4092         if (p2p_parse_ies(ie, ie_len, &msg))
4093                 return;
4094         if (msg.minor_reason_code == NULL) {
4095                 p2p_parse_free(&msg);
4096                 return;
4097         }
4098
4099         p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
4100                 " reason_code=%u minor_reason_code=%u",
4101                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4102
4103         p2p_parse_free(&msg);
4104 }
4105
4106
4107 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4108                         const u8 *ie, size_t ie_len)
4109 {
4110         struct p2p_message msg;
4111
4112         if (bssid == NULL || ie == NULL)
4113                 return;
4114
4115         os_memset(&msg, 0, sizeof(msg));
4116         if (p2p_parse_ies(ie, ie_len, &msg))
4117                 return;
4118         if (msg.minor_reason_code == NULL) {
4119                 p2p_parse_free(&msg);
4120                 return;
4121         }
4122
4123         p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
4124                 " reason_code=%u minor_reason_code=%u",
4125                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4126
4127         p2p_parse_free(&msg);
4128 }
4129
4130
4131 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
4132 {
4133         if (enabled) {
4134                 p2p_dbg(p2p, "Managed P2P Device operations enabled");
4135                 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
4136         } else {
4137                 p2p_dbg(p2p, "Managed P2P Device operations disabled");
4138                 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
4139         }
4140 }
4141
4142
4143 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class,
4144                                  u8 *op_channel)
4145 {
4146         return p2p_channel_random_social(&p2p->channels, op_class, op_channel);
4147 }
4148
4149
4150 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
4151                            u8 forced)
4152 {
4153         if (p2p_channel_to_freq(reg_class, channel) < 0)
4154                 return -1;
4155
4156         p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
4157                 reg_class, channel);
4158
4159         /*
4160          * Listen channel was set in configuration or set by control interface;
4161          * cannot override it.
4162          */
4163         if (p2p->cfg->channel_forced && forced == 0)
4164                 return -1;
4165
4166         if (p2p->state == P2P_IDLE) {
4167                 p2p->cfg->reg_class = reg_class;
4168                 p2p->cfg->channel = channel;
4169                 p2p->cfg->channel_forced = forced;
4170         } else {
4171                 p2p_dbg(p2p, "Defer setting listen channel");
4172                 p2p->pending_reg_class = reg_class;
4173                 p2p->pending_channel = channel;
4174                 p2p->pending_channel_forced = forced;
4175         }
4176
4177         return 0;
4178 }
4179
4180
4181 u8 p2p_get_listen_channel(struct p2p_data *p2p)
4182 {
4183         return p2p->cfg->channel;
4184 }
4185
4186
4187 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
4188 {
4189         p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
4190         if (postfix == NULL) {
4191                 p2p->cfg->ssid_postfix_len = 0;
4192                 return 0;
4193         }
4194         if (len > sizeof(p2p->cfg->ssid_postfix))
4195                 return -1;
4196         os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
4197         p2p->cfg->ssid_postfix_len = len;
4198         return 0;
4199 }
4200
4201
4202 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
4203                          int cfg_op_channel)
4204 {
4205         if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
4206                 return -1;
4207
4208         p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
4209                 op_reg_class, op_channel);
4210         p2p->cfg->op_reg_class = op_reg_class;
4211         p2p->cfg->op_channel = op_channel;
4212         p2p->cfg->cfg_op_channel = cfg_op_channel;
4213         return 0;
4214 }
4215
4216
4217 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
4218                       const struct p2p_channel *pref_chan)
4219 {
4220         struct p2p_channel *n;
4221
4222         if (pref_chan) {
4223                 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
4224                 if (n == NULL)
4225                         return -1;
4226                 os_memcpy(n, pref_chan,
4227                           num_pref_chan * sizeof(struct p2p_channel));
4228         } else
4229                 n = NULL;
4230
4231         os_free(p2p->cfg->pref_chan);
4232         p2p->cfg->pref_chan = n;
4233         p2p->cfg->num_pref_chan = num_pref_chan;
4234
4235         return 0;
4236 }
4237
4238
4239 int p2p_set_no_go_freq(struct p2p_data *p2p,
4240                        const struct wpa_freq_range_list *list)
4241 {
4242         struct wpa_freq_range *tmp;
4243
4244         if (list == NULL || list->num == 0) {
4245                 os_free(p2p->no_go_freq.range);
4246                 p2p->no_go_freq.range = NULL;
4247                 p2p->no_go_freq.num = 0;
4248                 return 0;
4249         }
4250
4251         tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4252         if (tmp == NULL)
4253                 return -1;
4254         os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4255         os_free(p2p->no_go_freq.range);
4256         p2p->no_go_freq.range = tmp;
4257         p2p->no_go_freq.num = list->num;
4258         p2p_dbg(p2p, "Updated no GO chan list");
4259
4260         return 0;
4261 }
4262
4263
4264 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4265                            u8 *iface_addr)
4266 {
4267         struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4268         if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4269                 return -1;
4270         os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4271         return 0;
4272 }
4273
4274
4275 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4276                            u8 *dev_addr)
4277 {
4278         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4279         if (dev == NULL)
4280                 return -1;
4281         os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4282         return 0;
4283 }
4284
4285
4286 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4287 {
4288         os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4289         if (is_zero_ether_addr(p2p->peer_filter))
4290                 p2p_dbg(p2p, "Disable peer filter");
4291         else
4292                 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4293                         MAC2STR(p2p->peer_filter));
4294 }
4295
4296
4297 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4298 {
4299         p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4300         if (p2p->cross_connect == enabled)
4301                 return;
4302         p2p->cross_connect = enabled;
4303         /* TODO: may need to tear down any action group where we are GO(?) */
4304 }
4305
4306
4307 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4308 {
4309         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4310         if (dev == NULL)
4311                 return -1;
4312         if (dev->oper_freq <= 0)
4313                 return -1;
4314         return dev->oper_freq;
4315 }
4316
4317
4318 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4319 {
4320         p2p_dbg(p2p, "Intra BSS distribution %s",
4321                 enabled ? "enabled" : "disabled");
4322         p2p->cfg->p2p_intra_bss = enabled;
4323 }
4324
4325
4326 void p2p_update_channel_list(struct p2p_data *p2p,
4327                              const struct p2p_channels *chan,
4328                              const struct p2p_channels *cli_chan)
4329 {
4330         p2p_dbg(p2p, "Update channel list");
4331         os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4332         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4333         os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4334                   sizeof(struct p2p_channels));
4335         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4336 }
4337
4338
4339 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4340                     const u8 *src, const u8 *bssid, const u8 *buf,
4341                     size_t len, unsigned int wait_time)
4342 {
4343         if (p2p->p2p_scan_running) {
4344                 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4345                 if (p2p->after_scan_tx) {
4346                         p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4347                         os_free(p2p->after_scan_tx);
4348                 }
4349                 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4350                                                len);
4351                 if (p2p->after_scan_tx == NULL)
4352                         return -1;
4353                 p2p->after_scan_tx->freq = freq;
4354                 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4355                 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4356                 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4357                 p2p->after_scan_tx->len = len;
4358                 p2p->after_scan_tx->wait_time = wait_time;
4359                 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4360                 return 0;
4361         }
4362
4363         return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4364                                      buf, len, wait_time);
4365 }
4366
4367
4368 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4369                            int freq_overall)
4370 {
4371         p2p_dbg(p2p, "Best channel: 2.4 GHz: %d,  5 GHz: %d,  overall: %d",
4372                 freq_24, freq_5, freq_overall);
4373         p2p->best_freq_24 = freq_24;
4374         p2p->best_freq_5 = freq_5;
4375         p2p->best_freq_overall = freq_overall;
4376 }
4377
4378
4379 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4380 {
4381         p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4382         p2p->own_freq_preference = freq;
4383 }
4384
4385
4386 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4387 {
4388         if (p2p == NULL || p2p->go_neg_peer == NULL)
4389                 return NULL;
4390         return p2p->go_neg_peer->info.p2p_device_addr;
4391 }
4392
4393
4394 const struct p2p_peer_info *
4395 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4396 {
4397         struct p2p_device *dev;
4398
4399         if (addr) {
4400                 dev = p2p_get_device(p2p, addr);
4401                 if (!dev)
4402                         return NULL;
4403
4404                 if (!next) {
4405                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4406                                 return NULL;
4407
4408                         return &dev->info;
4409                 } else {
4410                         do {
4411                                 dev = dl_list_first(&dev->list,
4412                                                     struct p2p_device,
4413                                                     list);
4414                                 if (!dev || &dev->list == &p2p->devices)
4415                                         return NULL;
4416                         } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4417                 }
4418         } else {
4419                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4420                 if (!dev)
4421                         return NULL;
4422                 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4423                         dev = dl_list_first(&dev->list,
4424                                             struct p2p_device,
4425                                             list);
4426                         if (!dev || &dev->list == &p2p->devices)
4427                                 return NULL;
4428                 }
4429         }
4430
4431         return &dev->info;
4432 }
4433
4434
4435 int p2p_in_progress(struct p2p_data *p2p)
4436 {
4437         if (p2p == NULL)
4438                 return 0;
4439         if (p2p->state == P2P_SEARCH)
4440                 return 2;
4441         return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4442 }
4443
4444
4445 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4446                             u8 client_timeout)
4447 {
4448         if (p2p) {
4449                 p2p->go_timeout = go_timeout;
4450                 p2p->client_timeout = client_timeout;
4451         }
4452 }
4453
4454
4455 #ifdef CONFIG_WIFI_DISPLAY
4456
4457 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4458 {
4459         size_t g;
4460         struct p2p_group *group;
4461
4462         for (g = 0; g < p2p->num_groups; g++) {
4463                 group = p2p->groups[g];
4464                 p2p_group_force_beacon_update_ies(group);
4465         }
4466 }
4467
4468
4469 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4470 {
4471         wpabuf_free(p2p->wfd_ie_beacon);
4472         p2p->wfd_ie_beacon = ie;
4473         p2p_update_wfd_ie_groups(p2p);
4474         return 0;
4475 }
4476
4477
4478 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4479 {
4480         wpabuf_free(p2p->wfd_ie_probe_req);
4481         p2p->wfd_ie_probe_req = ie;
4482         return 0;
4483 }
4484
4485
4486 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4487 {
4488         wpabuf_free(p2p->wfd_ie_probe_resp);
4489         p2p->wfd_ie_probe_resp = ie;
4490         p2p_update_wfd_ie_groups(p2p);
4491         return 0;
4492 }
4493
4494
4495 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4496 {
4497         wpabuf_free(p2p->wfd_ie_assoc_req);
4498         p2p->wfd_ie_assoc_req = ie;
4499         return 0;
4500 }
4501
4502
4503 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4504 {
4505         wpabuf_free(p2p->wfd_ie_invitation);
4506         p2p->wfd_ie_invitation = ie;
4507         return 0;
4508 }
4509
4510
4511 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4512 {
4513         wpabuf_free(p2p->wfd_ie_prov_disc_req);
4514         p2p->wfd_ie_prov_disc_req = ie;
4515         return 0;
4516 }
4517
4518
4519 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
4520 {
4521         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
4522         p2p->wfd_ie_prov_disc_resp = ie;
4523         return 0;
4524 }
4525
4526
4527 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
4528 {
4529         wpabuf_free(p2p->wfd_ie_go_neg);
4530         p2p->wfd_ie_go_neg = ie;
4531         return 0;
4532 }
4533
4534
4535 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
4536 {
4537         wpabuf_free(p2p->wfd_dev_info);
4538         if (elem) {
4539                 p2p->wfd_dev_info = wpabuf_dup(elem);
4540                 if (p2p->wfd_dev_info == NULL)
4541                         return -1;
4542         } else
4543                 p2p->wfd_dev_info = NULL;
4544
4545         return 0;
4546 }
4547
4548
4549 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
4550 {
4551         wpabuf_free(p2p->wfd_assoc_bssid);
4552         if (elem) {
4553                 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
4554                 if (p2p->wfd_assoc_bssid == NULL)
4555                         return -1;
4556         } else
4557                 p2p->wfd_assoc_bssid = NULL;
4558
4559         return 0;
4560 }
4561
4562
4563 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
4564                                   const struct wpabuf *elem)
4565 {
4566         wpabuf_free(p2p->wfd_coupled_sink_info);
4567         if (elem) {
4568                 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
4569                 if (p2p->wfd_coupled_sink_info == NULL)
4570                         return -1;
4571         } else
4572                 p2p->wfd_coupled_sink_info = NULL;
4573
4574         return 0;
4575 }
4576
4577 #endif /* CONFIG_WIFI_DISPLAY */
4578
4579
4580 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
4581                      int max_disc_tu)
4582 {
4583         if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
4584                 return -1;
4585
4586         p2p->min_disc_int = min_disc_int;
4587         p2p->max_disc_int = max_disc_int;
4588         p2p->max_disc_tu = max_disc_tu;
4589         p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
4590                 min_disc_int, max_disc_int, max_disc_tu);
4591
4592         return 0;
4593 }
4594
4595
4596 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
4597 {
4598         va_list ap;
4599         char buf[500];
4600
4601         if (!p2p->cfg->debug_print)
4602                 return;
4603
4604         va_start(ap, fmt);
4605         vsnprintf(buf, sizeof(buf), fmt, ap);
4606         buf[sizeof(buf) - 1] = '\0';
4607         va_end(ap);
4608         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
4609 }
4610
4611
4612 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
4613 {
4614         va_list ap;
4615         char buf[500];
4616
4617         if (!p2p->cfg->debug_print)
4618                 return;
4619
4620         va_start(ap, fmt);
4621         vsnprintf(buf, sizeof(buf), fmt, ap);
4622         buf[sizeof(buf) - 1] = '\0';
4623         va_end(ap);
4624         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
4625 }
4626
4627
4628 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
4629 {
4630         va_list ap;
4631         char buf[500];
4632
4633         if (!p2p->cfg->debug_print)
4634                 return;
4635
4636         va_start(ap, fmt);
4637         vsnprintf(buf, sizeof(buf), fmt, ap);
4638         buf[sizeof(buf) - 1] = '\0';
4639         va_end(ap);
4640         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
4641 }
4642
4643
4644 void p2p_loop_on_known_peers(struct p2p_data *p2p,
4645                              void (*peer_callback)(struct p2p_peer_info *peer,
4646                                                    void *user_data),
4647                              void *user_data)
4648 {
4649         struct p2p_device *dev, *n;
4650
4651         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
4652                 peer_callback(&dev->info, user_data);
4653         }
4654 }
4655
4656
4657 #ifdef CONFIG_WPS_NFC
4658
4659 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
4660                                               int client_freq,
4661                                               const u8 *go_dev_addr,
4662                                               const u8 *ssid, size_t ssid_len)
4663 {
4664         struct wpabuf *buf;
4665         u8 op_class, channel;
4666         enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
4667
4668         buf = wpabuf_alloc(1000);
4669         if (buf == NULL)
4670                 return NULL;
4671
4672         op_class = p2p->cfg->reg_class;
4673         channel = p2p->cfg->channel;
4674
4675         p2p_buf_add_capability(buf, p2p->dev_capab &
4676                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
4677         p2p_buf_add_device_info(buf, p2p, NULL);
4678
4679         if (p2p->num_groups > 0) {
4680                 int freq = p2p_group_get_freq(p2p->groups[0]);
4681                 role = P2P_GO_IN_A_GROUP;
4682                 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
4683                         p2p_dbg(p2p,
4684                                 "Unknown GO operating frequency %d MHz for NFC handover",
4685                                 freq);
4686                         wpabuf_free(buf);
4687                         return NULL;
4688                 }
4689         } else if (client_freq > 0) {
4690                 role = P2P_CLIENT_IN_A_GROUP;
4691                 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
4692                         p2p_dbg(p2p,
4693                                 "Unknown client operating frequency %d MHz for NFC handover",
4694                                 client_freq);
4695                         wpabuf_free(buf);
4696                         return NULL;
4697                 }
4698         }
4699
4700         p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
4701                                        channel, role);
4702
4703         if (p2p->num_groups > 0) {
4704                 /* Limit number of clients to avoid very long message */
4705                 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
4706                 p2p_group_buf_add_id(p2p->groups[0], buf);
4707         } else if (client_freq > 0 &&
4708                    go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
4709                    ssid && ssid_len > 0) {
4710                 /*
4711                  * Add the optional P2P Group ID to indicate in which group this
4712                  * device is a P2P Client.
4713                  */
4714                 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
4715         }
4716
4717         return buf;
4718 }
4719
4720
4721 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
4722                                            int client_freq,
4723                                            const u8 *go_dev_addr,
4724                                            const u8 *ssid, size_t ssid_len)
4725 {
4726         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
4727                                       ssid_len);
4728 }
4729
4730
4731 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
4732                                            int client_freq,
4733                                            const u8 *go_dev_addr,
4734                                            const u8 *ssid, size_t ssid_len)
4735 {
4736         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
4737                                       ssid_len);
4738 }
4739
4740
4741 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
4742                                         struct p2p_nfc_params *params)
4743 {
4744         struct p2p_message msg;
4745         struct p2p_device *dev;
4746         const u8 *p2p_dev_addr;
4747         int freq;
4748         enum p2p_role_indication role;
4749
4750         params->next_step = NO_ACTION;
4751
4752         if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
4753                                    params->p2p_attr, params->p2p_len, &msg)) {
4754                 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
4755                 p2p_parse_free(&msg);
4756                 return -1;
4757         }
4758
4759         if (msg.p2p_device_addr)
4760                 p2p_dev_addr = msg.p2p_device_addr;
4761         else if (msg.device_id)
4762                 p2p_dev_addr = msg.device_id;
4763         else {
4764                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
4765                 p2p_parse_free(&msg);
4766                 return -1;
4767         }
4768
4769         if (msg.oob_dev_password) {
4770                 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
4771                           msg.oob_dev_password_len);
4772                 params->oob_dev_pw_len = msg.oob_dev_password_len;
4773         }
4774
4775         dev = p2p_create_device(p2p, p2p_dev_addr);
4776         if (dev == NULL) {
4777                 p2p_parse_free(&msg);
4778                 return -1;
4779         }
4780
4781         params->peer = &dev->info;
4782
4783         os_get_reltime(&dev->last_seen);
4784         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
4785         p2p_copy_wps_info(p2p, dev, 0, &msg);
4786
4787         if (!msg.oob_go_neg_channel) {
4788                 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
4789                 return -1;
4790         }
4791
4792         if (msg.oob_go_neg_channel[3] == 0 &&
4793             msg.oob_go_neg_channel[4] == 0)
4794                 freq = 0;
4795         else
4796                 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
4797                                            msg.oob_go_neg_channel[4]);
4798         if (freq < 0) {
4799                 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
4800                 return -1;
4801         }
4802         role = msg.oob_go_neg_channel[5];
4803
4804         if (role == P2P_GO_IN_A_GROUP) {
4805                 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
4806                 params->go_freq = freq;
4807         } else if (role == P2P_CLIENT_IN_A_GROUP) {
4808                 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
4809                         freq);
4810                 params->go_freq = freq;
4811         } else
4812                 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
4813         dev->oob_go_neg_freq = freq;
4814
4815         if (!params->sel && role != P2P_GO_IN_A_GROUP) {
4816                 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
4817                                            p2p->cfg->channel);
4818                 if (freq < 0) {
4819                         p2p_dbg(p2p, "Own listen channel not known");
4820                         return -1;
4821                 }
4822                 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
4823                 dev->oob_go_neg_freq = freq;
4824         }
4825
4826         if (msg.group_id) {
4827                 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
4828                 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
4829                 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
4830                           params->go_ssid_len);
4831         }
4832
4833         if (dev->flags & P2P_DEV_USER_REJECTED) {
4834                 p2p_dbg(p2p, "Do not report rejected device");
4835                 p2p_parse_free(&msg);
4836                 return 0;
4837         }
4838
4839         if (!(dev->flags & P2P_DEV_REPORTED)) {
4840                 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
4841                                     !(dev->flags & P2P_DEV_REPORTED_ONCE));
4842                 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
4843         }
4844         p2p_parse_free(&msg);
4845
4846         if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
4847                 params->next_step = BOTH_GO;
4848         else if (role == P2P_GO_IN_A_GROUP)
4849                 params->next_step = JOIN_GROUP;
4850         else if (role == P2P_CLIENT_IN_A_GROUP) {
4851                 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
4852                 params->next_step = PEER_CLIENT;
4853         } else if (p2p->num_groups > 0)
4854                 params->next_step = AUTH_JOIN;
4855         else if (params->sel)
4856                 params->next_step = INIT_GO_NEG;
4857         else
4858                 params->next_step = RESP_GO_NEG;
4859
4860         return 0;
4861 }
4862
4863
4864 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
4865                                       int go_intent,
4866                                       const u8 *own_interface_addr)
4867 {
4868
4869         p2p->authorized_oob_dev_pw_id = dev_pw_id;
4870         if (dev_pw_id == 0) {
4871                 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
4872                 return;
4873         }
4874
4875         p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
4876                 dev_pw_id);
4877
4878         p2p->go_intent = go_intent;
4879         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
4880 }
4881
4882 #endif /* CONFIG_WPS_NFC */
4883
4884
4885 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
4886 {
4887         if (len < 8 || len > 63)
4888                 return -1;
4889         p2p->cfg->passphrase_len = len;
4890         return 0;
4891 }
4892
4893
4894 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
4895 {
4896         p2p->vendor_elem = vendor_elem;
4897 }
4898
4899
4900 void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx)
4901 {
4902         struct p2p_data *p2p = eloop_ctx;
4903
4904         p2p_dbg(p2p,
4905                 "Timeout on waiting peer to become ready for GO Negotiation");
4906         p2p_go_neg_failed(p2p, -1);
4907 }