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         eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
 223         if (p2p->state != P2P_SEARCH) {
 224                 /*
 225                  * Clear timeouts related to GO Negotiation if no new p2p_find
 226                  * has been started.
 227                  */
 228                 p2p_clear_timeout(p2p);
 229                 p2p_set_state(p2p, P2P_IDLE);
 230         }
 231
 232         peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
 233         peer->wps_method = WPS_NOT_READY;
 234         peer->oob_pw_id = 0;
 235         wpabuf_free(peer->go_neg_conf);
 236         peer->go_neg_conf = NULL;
 237         p2p->go_neg_peer = NULL;
 238
 239         os_memset(&res, 0, sizeof(res));
 240         res.status = status;
 241         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
 242         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
 243         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
 244 }
 245
 246
 247 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
 248 {
 249         unsigned int r, tu;
 250         int freq;
 251         struct wpabuf *ies;
 252
 253         p2p_dbg(p2p, "Starting short listen state (state=%s)",
 254                 p2p_state_txt(p2p->state));
 255
 256         if (p2p->pending_listen_freq) {
 257                 /* We have a pending p2p_listen request */
 258                 p2p_dbg(p2p, "p2p_listen command pending already");
 259                 return;
 260         }
 261
 262         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 263         if (freq < 0) {
 264                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 265                 return;
 266         }
 267
 268         if (os_get_random((u8 *) &r, sizeof(r)) < 0)
 269                 r = 0;
 270         tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
 271               p2p->min_disc_int) * 100;
 272         if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
 273                 tu = p2p->max_disc_tu;
 274         if (!dev_disc && tu < 100)
 275                 tu = 100; /* Need to wait in non-device discovery use cases */
 276         if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
 277                 tu = p2p->cfg->max_listen * 1000 / 1024;
 278
 279         if (tu == 0) {
 280                 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
 281                 p2p_set_timeout(p2p, 0, 0);
 282                 return;
 283         }
 284
 285         ies = p2p_build_probe_resp_ies(p2p);
 286         if (ies == NULL)
 287                 return;
 288
 289         p2p->pending_listen_freq = freq;
 290         p2p->pending_listen_sec = 0;
 291         p2p->pending_listen_usec = 1024 * tu;
 292
 293         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
 294                     ies) < 0) {
 295                 p2p_dbg(p2p, "Failed to start listen mode");
 296                 p2p->pending_listen_freq = 0;
 297         }
 298         wpabuf_free(ies);
 299 }
 300
 301
 302 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
 303 {
 304         int freq;
 305         struct wpabuf *ies;
 306
 307         p2p_dbg(p2p, "Going to listen(only) state");
 308
 309         if (p2p->pending_listen_freq) {
 310                 /* We have a pending p2p_listen request */
 311                 p2p_dbg(p2p, "p2p_listen command pending already");
 312                 return -1;
 313         }
 314
 315         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 316         if (freq < 0) {
 317                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 318                 return -1;
 319         }
 320
 321         p2p->pending_listen_sec = timeout / 1000;
 322         p2p->pending_listen_usec = (timeout % 1000) * 1000;
 323
 324         if (p2p->p2p_scan_running) {
 325                 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
 326                         p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
 327                         return 0;
 328                 }
 329                 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
 330                 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
 331                 return 0;
 332         }
 333
 334         ies = p2p_build_probe_resp_ies(p2p);
 335         if (ies == NULL)
 336                 return -1;
 337
 338         p2p->pending_listen_freq = freq;
 339
 340         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
 341                 p2p_dbg(p2p, "Failed to start listen mode");
 342                 p2p->pending_listen_freq = 0;
 343                 wpabuf_free(ies);
 344                 return -1;
 345         }
 346         wpabuf_free(ies);
 347
 348         p2p_set_state(p2p, P2P_LISTEN_ONLY);
 349
 350         return 0;
 351 }
 352
 353
 354 static void p2p_device_clear_reported(struct p2p_data *p2p)
 355 {
 356         struct p2p_device *dev;
 357         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 358                 dev->flags &= ~P2P_DEV_REPORTED;
 359                 dev->sd_reqs = 0;
 360         }
 361 }
 362
 363
 364 /**
 365  * p2p_get_device - Fetch a peer entry
 366  * @p2p: P2P module context from p2p_init()
 367  * @addr: P2P Device Address of the peer
 368  * Returns: Pointer to the device entry or %NULL if not found
 369  */
 370 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
 371 {
 372         struct p2p_device *dev;
 373         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 374                 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
 375                         return dev;
 376         }
 377         return NULL;
 378 }
 379
 380
 381 /**
 382  * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
 383  * @p2p: P2P module context from p2p_init()
 384  * @addr: P2P Interface Address of the peer
 385  * Returns: Pointer to the device entry or %NULL if not found
 386  */
 387 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
 388                                              const u8 *addr)
 389 {
 390         struct p2p_device *dev;
 391         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 392                 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
 393                         return dev;
 394         }
 395         return NULL;
 396 }
 397
 398
 399 /**
 400  * p2p_create_device - Create a peer entry
 401  * @p2p: P2P module context from p2p_init()
 402  * @addr: P2P Device Address of the peer
 403  * Returns: Pointer to the device entry or %NULL on failure
 404  *
 405  * If there is already an entry for the peer, it will be returned instead of
 406  * creating a new one.
 407  */
 408 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
 409                                              const u8 *addr)
 410 {
 411         struct p2p_device *dev, *oldest = NULL;
 412         size_t count = 0;
 413
 414         dev = p2p_get_device(p2p, addr);
 415         if (dev)
 416                 return dev;
 417
 418         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 419                 count++;
 420                 if (oldest == NULL ||
 421                     os_reltime_before(&dev->last_seen, &oldest->last_seen))
 422                         oldest = dev;
 423         }
 424         if (count + 1 > p2p->cfg->max_peers && oldest) {
 425                 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
 426                 dl_list_del(&oldest->list);
 427                 p2p_device_free(p2p, oldest);
 428         }
 429
 430         dev = os_zalloc(sizeof(*dev));
 431         if (dev == NULL)
 432                 return NULL;
 433         dl_list_add(&p2p->devices, &dev->list);
 434         os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
 435
 436         return dev;
 437 }
 438
 439
 440 static void p2p_copy_client_info(struct p2p_device *dev,
 441                                  struct p2p_client_info *cli)
 442 {
 443         os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
 444         dev->info.device_name[cli->dev_name_len] = '\0';
 445         dev->info.dev_capab = cli->dev_capab;
 446         dev->info.config_methods = cli->config_methods;
 447         os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
 448         dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
 449         os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
 450                   dev->info.wps_sec_dev_type_list_len);
 451 }
 452
 453
 454 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
 455                                  const u8 *go_interface_addr, int freq,
 456                                  const u8 *gi, size_t gi_len)
 457 {
 458         struct p2p_group_info info;
 459         size_t c;
 460         struct p2p_device *dev;
 461
 462         if (gi == NULL)
 463                 return 0;
 464
 465         if (p2p_group_info_parse(gi, gi_len, &info) < 0)
 466                 return -1;
 467
 468         /*
 469          * Clear old data for this group; if the devices are still in the
 470          * group, the information will be restored in the loop following this.
 471          */
 472         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 473                 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
 474                               ETH_ALEN) == 0) {
 475                         os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
 476                         os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
 477                 }
 478         }
 479
 480         for (c = 0; c < info.num_clients; c++) {
 481                 struct p2p_client_info *cli = &info.client[c];
 482                 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
 483                               ETH_ALEN) == 0)
 484                         continue; /* ignore our own entry */
 485                 dev = p2p_get_device(p2p, cli->p2p_device_addr);
 486                 if (dev) {
 487                         if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
 488                                           P2P_DEV_PROBE_REQ_ONLY)) {
 489                                 /*
 490                                  * Update information since we have not
 491                                  * received this directly from the client.
 492                                  */
 493                                 p2p_copy_client_info(dev, cli);
 494                         } else {
 495                                 /*
 496                                  * Need to update P2P Client Discoverability
 497                                  * flag since it is valid only in P2P Group
 498                                  * Info attribute.
 499                                  */
 500                                 dev->info.dev_capab &=
 501                                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 502                                 dev->info.dev_capab |=
 503                                         cli->dev_capab &
 504                                         P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 505                         }
 506                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
 507                                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
 508                         }
 509                 } else {
 510                         dev = p2p_create_device(p2p, cli->p2p_device_addr);
 511                         if (dev == NULL)
 512                                 continue;
 513                         dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
 514                         p2p_copy_client_info(dev, cli);
 515                         dev->oper_freq = freq;
 516                         p2p->cfg->dev_found(p2p->cfg->cb_ctx,
 517                                             dev->info.p2p_device_addr,
 518                                             &dev->info, 1);
 519                         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 520                 }
 521
 522                 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
 523                           ETH_ALEN);
 524                 os_get_reltime(&dev->last_seen);
 525                 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
 526                 os_memcpy(dev->member_in_go_iface, go_interface_addr,
 527                           ETH_ALEN);
 528         }
 529
 530         return 0;
 531 }
 532
 533
 534 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
 535                               int probe_req, const struct p2p_message *msg)
 536 {
 537         os_memcpy(dev->info.device_name, msg->device_name,
 538                   sizeof(dev->info.device_name));
 539
 540         if (msg->manufacturer &&
 541             msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
 542                 os_memset(dev->info.manufacturer, 0,
 543                           sizeof(dev->info.manufacturer));
 544                 os_memcpy(dev->info.manufacturer, msg->manufacturer,
 545                           msg->manufacturer_len);
 546         }
 547
 548         if (msg->model_name &&
 549             msg->model_name_len < sizeof(dev->info.model_name)) {
 550                 os_memset(dev->info.model_name, 0,
 551                           sizeof(dev->info.model_name));
 552                 os_memcpy(dev->info.model_name, msg->model_name,
 553                           msg->model_name_len);
 554         }
 555
 556         if (msg->model_number &&
 557             msg->model_number_len < sizeof(dev->info.model_number)) {
 558                 os_memset(dev->info.model_number, 0,
 559                           sizeof(dev->info.model_number));
 560                 os_memcpy(dev->info.model_number, msg->model_number,
 561                           msg->model_number_len);
 562         }
 563
 564         if (msg->serial_number &&
 565             msg->serial_number_len < sizeof(dev->info.serial_number)) {
 566                 os_memset(dev->info.serial_number, 0,
 567                           sizeof(dev->info.serial_number));
 568                 os_memcpy(dev->info.serial_number, msg->serial_number,
 569                           msg->serial_number_len);
 570         }
 571
 572         if (msg->pri_dev_type)
 573                 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
 574                           sizeof(dev->info.pri_dev_type));
 575         else if (msg->wps_pri_dev_type)
 576                 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
 577                           sizeof(dev->info.pri_dev_type));
 578
 579         if (msg->wps_sec_dev_type_list) {
 580                 os_memcpy(dev->info.wps_sec_dev_type_list,
 581                           msg->wps_sec_dev_type_list,
 582                           msg->wps_sec_dev_type_list_len);
 583                 dev->info.wps_sec_dev_type_list_len =
 584                         msg->wps_sec_dev_type_list_len;
 585         }
 586
 587         if (msg->capability) {
 588                 /*
 589                  * P2P Client Discoverability bit is reserved in all frames
 590                  * that use this function, so do not change its value here.
 591                  */
 592                 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 593                 dev->info.dev_capab |= msg->capability[0] &
 594                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 595                 dev->info.group_capab = msg->capability[1];
 596         }
 597
 598         if (msg->ext_listen_timing) {
 599                 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
 600                 dev->ext_listen_interval =
 601                         WPA_GET_LE16(msg->ext_listen_timing + 2);
 602         }
 603
 604         if (!probe_req) {
 605                 u16 new_config_methods;
 606                 new_config_methods = msg->config_methods ?
 607                         msg->config_methods : msg->wps_config_methods;
 608                 if (new_config_methods &&
 609                     dev->info.config_methods != new_config_methods) {
 610                         p2p_dbg(p2p, "Update peer " MACSTR
 611                                 " config_methods 0x%x -> 0x%x",
 612                                 MAC2STR(dev->info.p2p_device_addr),
 613                                 dev->info.config_methods,
 614                                 new_config_methods);
 615                         dev->info.config_methods = new_config_methods;
 616                 }
 617         }
 618 }
 619
 620
 621 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies,
 622                                          size_t ies_len)
 623 {
 624         const u8 *pos, *end;
 625         u8 id, len;
 626
 627         wpabuf_free(dev->info.vendor_elems);
 628         dev->info.vendor_elems = NULL;
 629
 630         end = ies + ies_len;
 631
 632         for (pos = ies; pos + 1 < end; pos += len) {
 633                 id = *pos++;
 634                 len = *pos++;
 635
 636                 if (pos + len > end)
 637                         break;
 638
 639                 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3)
 640                         continue;
 641
 642                 if (len >= 4) {
 643                         u32 type = WPA_GET_BE32(pos);
 644
 645                         if (type == WPA_IE_VENDOR_TYPE ||
 646                             type == WMM_IE_VENDOR_TYPE ||
 647                             type == WPS_IE_VENDOR_TYPE ||
 648                             type == P2P_IE_VENDOR_TYPE ||
 649                             type == WFD_IE_VENDOR_TYPE)
 650                                 continue;
 651                 }
 652
 653                 /* Unknown vendor element - make raw IE data available */
 654                 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0)
 655                         break;
 656                 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len);
 657         }
 658 }
 659
 660
 661 static int p2p_compare_wfd_info(struct p2p_device *dev,
 662                               const struct p2p_message *msg)
 663 {
 664         if (dev->info.wfd_subelems && msg->wfd_subelems) {
 665                 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used)
 666                         return 1;
 667
 668                 return os_memcmp(dev->info.wfd_subelems->buf,
 669                                  msg->wfd_subelems->buf,
 670                                  dev->info.wfd_subelems->used);
 671         }
 672         if (dev->info.wfd_subelems || msg->wfd_subelems)
 673                 return 1;
 674
 675         return 0;
 676 }
 677
 678
 679 /**
 680  * p2p_add_device - Add peer entries based on scan results or P2P frames
 681  * @p2p: P2P module context from p2p_init()
 682  * @addr: Source address of Beacon or Probe Response frame (may be either
 683  *      P2P Device Address or P2P Interface Address)
 684  * @level: Signal level (signal strength of the received frame from the peer)
 685  * @freq: Frequency on which the Beacon or Probe Response frame was received
 686  * @rx_time: Time when the result was received
 687  * @ies: IEs from the Beacon or Probe Response frame
 688  * @ies_len: Length of ies buffer in octets
 689  * @scan_res: Whether this was based on scan results
 690  * Returns: 0 on success, -1 on failure
 691  *
 692  * If the scan result is for a GO, the clients in the group will also be added
 693  * to the peer table. This function can also be used with some other frames
 694  * like Provision Discovery Request that contains P2P Capability and P2P Device
 695  * Info attributes.
 696  */
 697 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
 698                    struct os_reltime *rx_time, int level, const u8 *ies,
 699                    size_t ies_len, int scan_res)
 700 {
 701         struct p2p_device *dev;
 702         struct p2p_message msg;
 703         const u8 *p2p_dev_addr;
 704         int wfd_changed;
 705         int i;
 706         struct os_reltime time_now;
 707
 708         os_memset(&msg, 0, sizeof(msg));
 709         if (p2p_parse_ies(ies, ies_len, &msg)) {
 710                 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
 711                 p2p_parse_free(&msg);
 712                 return -1;
 713         }
 714
 715         if (msg.p2p_device_addr)
 716                 p2p_dev_addr = msg.p2p_device_addr;
 717         else if (msg.device_id)
 718                 p2p_dev_addr = msg.device_id;
 719         else {
 720                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
 721                 p2p_parse_free(&msg);
 722                 return -1;
 723         }
 724
 725         if (!is_zero_ether_addr(p2p->peer_filter) &&
 726             os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
 727                 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
 728                         " due to peer filter", MAC2STR(p2p_dev_addr));
 729                 p2p_parse_free(&msg);
 730                 return 0;
 731         }
 732
 733         dev = p2p_create_device(p2p, p2p_dev_addr);
 734         if (dev == NULL) {
 735                 p2p_parse_free(&msg);
 736                 return -1;
 737         }
 738
 739         if (rx_time == NULL) {
 740                 os_get_reltime(&time_now);
 741                 rx_time = &time_now;
 742         }
 743
 744         /*
 745          * Update the device entry only if the new peer
 746          * entry is newer than the one previously stored.
 747          */
 748         if (dev->last_seen.sec > 0 &&
 749             os_reltime_before(rx_time, &dev->last_seen)) {
 750                 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)",
 751                         (unsigned int) rx_time->sec,
 752                         (unsigned int) rx_time->usec,
 753                         (unsigned int) dev->last_seen.sec,
 754                         (unsigned int) dev->last_seen.usec);
 755                 p2p_parse_free(&msg);
 756                 return -1;
 757         }
 758
 759         os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
 760
 761         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
 762
 763         if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
 764                 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
 765         if (msg.ssid &&
 766             (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
 767              os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
 768              != 0)) {
 769                 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
 770                 dev->oper_ssid_len = msg.ssid[1];
 771         }
 772
 773         if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
 774             *msg.ds_params >= 1 && *msg.ds_params <= 14) {
 775                 int ds_freq;
 776                 if (*msg.ds_params == 14)
 777                         ds_freq = 2484;
 778                 else
 779                         ds_freq = 2407 + *msg.ds_params * 5;
 780                 if (freq != ds_freq) {
 781                         p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
 782                                 freq, ds_freq);
 783                         freq = ds_freq;
 784                 }
 785         }
 786
 787         if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
 788                 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
 789                         MACSTR " %d -> %d MHz (DS param %d)",
 790                         MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
 791                         freq, msg.ds_params ? *msg.ds_params : -1);
 792         }
 793         if (scan_res) {
 794                 dev->listen_freq = freq;
 795                 if (msg.group_info)
 796                         dev->oper_freq = freq;
 797         }
 798         dev->info.level = level;
 799
 800         p2p_copy_wps_info(p2p, dev, 0, &msg);
 801
 802         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 803                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 804                 dev->info.wps_vendor_ext[i] = NULL;
 805         }
 806
 807         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 808                 if (msg.wps_vendor_ext[i] == NULL)
 809                         break;
 810                 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
 811                         msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
 812                 if (dev->info.wps_vendor_ext[i] == NULL)
 813                         break;
 814         }
 815
 816         wfd_changed = p2p_compare_wfd_info(dev, &msg);
 817
 818         if (msg.wfd_subelems) {
 819                 wpabuf_free(dev->info.wfd_subelems);
 820                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
 821         }
 822
 823         if (scan_res) {
 824                 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
 825                                       msg.group_info, msg.group_info_len);
 826         }
 827
 828         p2p_parse_free(&msg);
 829
 830         p2p_update_peer_vendor_elems(dev, ies, ies_len);
 831
 832         if (dev->flags & P2P_DEV_REPORTED && !wfd_changed)
 833                 return 0;
 834
 835         p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
 836                 freq, (unsigned int) rx_time->sec,
 837                 (unsigned int) rx_time->usec);
 838         if (dev->flags & P2P_DEV_USER_REJECTED) {
 839                 p2p_dbg(p2p, "Do not report rejected device");
 840                 return 0;
 841         }
 842
 843         if (dev->info.config_methods == 0 &&
 844             (freq == 2412 || freq == 2437 || freq == 2462)) {
 845                 /*
 846                  * If we have only seen a Beacon frame from a GO, we do not yet
 847                  * know what WPS config methods it supports. Since some
 848                  * applications use config_methods value from P2P-DEVICE-FOUND
 849                  * events, postpone reporting this peer until we've fully
 850                  * discovered its capabilities.
 851                  *
 852                  * At least for now, do this only if the peer was detected on
 853                  * one of the social channels since that peer can be easily be
 854                  * found again and there are no limitations of having to use
 855                  * passive scan on this channels, so this can be done through
 856                  * Probe Response frame that includes the config_methods
 857                  * information.
 858                  */
 859                 p2p_dbg(p2p, "Do not report peer " MACSTR
 860                         " with unknown config methods", MAC2STR(addr));
 861                 return 0;
 862         }
 863
 864         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
 865                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
 866         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 867
 868         return 0;
 869 }
 870
 871
 872 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
 873 {
 874         int i;
 875
 876         if (p2p->go_neg_peer == dev) {
 877                 /*
 878                  * If GO Negotiation is in progress, report that it has failed.
 879                  */
 880                 p2p_go_neg_failed(p2p, -1);
 881         }
 882         if (p2p->invite_peer == dev)
 883                 p2p->invite_peer = NULL;
 884         if (p2p->sd_peer == dev)
 885                 p2p->sd_peer = NULL;
 886         if (p2p->pending_client_disc_go == dev)
 887                 p2p->pending_client_disc_go = NULL;
 888
 889         /* dev_lost() device, but only if it was previously dev_found() */
 890         if (dev->flags & P2P_DEV_REPORTED_ONCE)
 891                 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
 892                                    dev->info.p2p_device_addr);
 893
 894         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 895                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 896                 dev->info.wps_vendor_ext[i] = NULL;
 897         }
 898
 899         wpabuf_free(dev->info.wfd_subelems);
 900         wpabuf_free(dev->info.vendor_elems);
 901         wpabuf_free(dev->go_neg_conf);
 902
 903         os_free(dev);
 904 }
 905
 906
 907 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
 908 {
 909         struct p2p_channels *c;
 910         struct p2p_reg_class *cla;
 911         size_t cl, ch;
 912         int found = 0;
 913         u8 reg_class;
 914         u8 channel;
 915         int freq;
 916
 917         c = &p2p->cfg->channels;
 918         for (cl = 0; cl < c->reg_classes; cl++) {
 919                 cla = &c->reg_class[cl];
 920                 if (cla->reg_class != p2p->last_prog_scan_class)
 921                         continue;
 922                 for (ch = 0; ch < cla->channels; ch++) {
 923                         if (cla->channel[ch] == p2p->last_prog_scan_chan) {
 924                                 found = 1;
 925                                 break;
 926                         }
 927                 }
 928                 if (found)
 929                         break;
 930         }
 931
 932         if (!found) {
 933                 /* Start from beginning */
 934                 reg_class = c->reg_class[0].reg_class;
 935                 channel = c->reg_class[0].channel[0];
 936         } else {
 937                 /* Pick the next channel */
 938                 ch++;
 939                 if (ch == cla->channels) {
 940                         cl++;
 941                         if (cl == c->reg_classes)
 942                                 cl = 0;
 943                         ch = 0;
 944                 }
 945                 reg_class = c->reg_class[cl].reg_class;
 946                 channel = c->reg_class[cl].channel[ch];
 947         }
 948
 949         freq = p2p_channel_to_freq(reg_class, channel);
 950         p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
 951                 reg_class, channel, freq);
 952         p2p->last_prog_scan_class = reg_class;
 953         p2p->last_prog_scan_chan = channel;
 954
 955         if (freq == 2412 || freq == 2437 || freq == 2462)
 956                 return 0; /* No need to add social channels */
 957         return freq;
 958 }
 959
 960
 961 static void p2p_search(struct p2p_data *p2p)
 962 {
 963         int freq = 0;
 964         enum p2p_scan_type type;
 965         u16 pw_id = DEV_PW_DEFAULT;
 966         int res;
 967
 968         if (p2p->drv_in_listen) {
 969                 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
 970                 return;
 971         }
 972         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
 973
 974         if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
 975             (freq = p2p_get_next_prog_freq(p2p)) > 0) {
 976                 type = P2P_SCAN_SOCIAL_PLUS_ONE;
 977                 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
 978         } else {
 979                 type = P2P_SCAN_SOCIAL;
 980                 p2p_dbg(p2p, "Starting search");
 981         }
 982
 983         res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
 984                                  p2p->num_req_dev_types, p2p->req_dev_types,
 985                                  p2p->find_dev_id, pw_id);
 986         if (res < 0) {
 987                 p2p_dbg(p2p, "Scan request schedule failed");
 988                 p2p_continue_find(p2p);
 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 void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status)
1002 {
1003         if (status != 0) {
1004                 p2p_dbg(p2p, "Scan request failed");
1005                 /* Do continue find even for the first p2p_find_scan */
1006                 p2p_continue_find(p2p);
1007         } else {
1008                 p2p_dbg(p2p, "Running p2p_scan");
1009                 p2p->p2p_scan_running = 1;
1010                 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1011                 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1012                                        p2p, NULL);
1013         }
1014 }
1015
1016
1017 static int p2p_run_after_scan(struct p2p_data *p2p)
1018 {
1019         struct p2p_device *dev;
1020         enum p2p_after_scan op;
1021
1022         if (p2p->after_scan_tx) {
1023                 p2p->after_scan_tx_in_progress = 1;
1024                 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
1025                 p2p->cfg->send_action(p2p->cfg->cb_ctx,
1026                                       p2p->after_scan_tx->freq,
1027                                       p2p->after_scan_tx->dst,
1028                                       p2p->after_scan_tx->src,
1029                                       p2p->after_scan_tx->bssid,
1030                                       (u8 *) (p2p->after_scan_tx + 1),
1031                                       p2p->after_scan_tx->len,
1032                                       p2p->after_scan_tx->wait_time);
1033                 os_free(p2p->after_scan_tx);
1034                 p2p->after_scan_tx = NULL;
1035                 return 1;
1036         }
1037
1038         op = p2p->start_after_scan;
1039         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1040         switch (op) {
1041         case P2P_AFTER_SCAN_NOTHING:
1042                 break;
1043         case P2P_AFTER_SCAN_LISTEN:
1044                 p2p_dbg(p2p, "Start previously requested Listen state");
1045                 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
1046                            p2p->pending_listen_usec / 1000);
1047                 return 1;
1048         case P2P_AFTER_SCAN_CONNECT:
1049                 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
1050                         MAC2STR(p2p->after_scan_peer));
1051                 dev = p2p_get_device(p2p, p2p->after_scan_peer);
1052                 if (dev == NULL) {
1053                         p2p_dbg(p2p, "Peer not known anymore");
1054                         break;
1055                 }
1056                 p2p_connect_send(p2p, dev);
1057                 return 1;
1058         }
1059
1060         return 0;
1061 }
1062
1063
1064 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1065 {
1066         struct p2p_data *p2p = eloop_ctx;
1067         int running;
1068         p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
1069         running = p2p->p2p_scan_running;
1070         /* Make sure we recover from missed scan results callback */
1071         p2p->p2p_scan_running = 0;
1072
1073         if (running)
1074                 p2p_run_after_scan(p2p);
1075 }
1076
1077
1078 static void p2p_free_req_dev_types(struct p2p_data *p2p)
1079 {
1080         p2p->num_req_dev_types = 0;
1081         os_free(p2p->req_dev_types);
1082         p2p->req_dev_types = NULL;
1083 }
1084
1085
1086 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
1087              enum p2p_discovery_type type,
1088              unsigned int num_req_dev_types, const u8 *req_dev_types,
1089              const u8 *dev_id, unsigned int search_delay)
1090 {
1091         int res;
1092
1093         p2p_dbg(p2p, "Starting find (type=%d)", type);
1094         os_get_reltime(&p2p->find_start);
1095         if (p2p->p2p_scan_running) {
1096                 p2p_dbg(p2p, "p2p_scan is already running");
1097         }
1098
1099         p2p_free_req_dev_types(p2p);
1100         if (req_dev_types && num_req_dev_types) {
1101                 p2p->req_dev_types = os_malloc(num_req_dev_types *
1102                                                WPS_DEV_TYPE_LEN);
1103                 if (p2p->req_dev_types == NULL)
1104                         return -1;
1105                 os_memcpy(p2p->req_dev_types, req_dev_types,
1106                           num_req_dev_types * WPS_DEV_TYPE_LEN);
1107                 p2p->num_req_dev_types = num_req_dev_types;
1108         }
1109
1110         if (dev_id) {
1111                 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1112                 p2p->find_dev_id = p2p->find_dev_id_buf;
1113         } else
1114                 p2p->find_dev_id = NULL;
1115
1116         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1117         p2p_clear_timeout(p2p);
1118         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1119         p2p->find_type = type;
1120         p2p_device_clear_reported(p2p);
1121         p2p_set_state(p2p, P2P_SEARCH);
1122         p2p->search_delay = search_delay;
1123         p2p->in_search_delay = 0;
1124         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1125         p2p->last_p2p_find_timeout = timeout;
1126         if (timeout)
1127                 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1128                                        p2p, NULL);
1129         switch (type) {
1130         case P2P_FIND_START_WITH_FULL:
1131         case P2P_FIND_PROGRESSIVE:
1132                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1133                                          p2p->num_req_dev_types,
1134                                          p2p->req_dev_types, dev_id,
1135                                          DEV_PW_DEFAULT);
1136                 break;
1137         case P2P_FIND_ONLY_SOCIAL:
1138                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1139                                          p2p->num_req_dev_types,
1140                                          p2p->req_dev_types, dev_id,
1141                                          DEV_PW_DEFAULT);
1142                 break;
1143         default:
1144                 return -1;
1145         }
1146
1147         if (res != 0 && p2p->p2p_scan_running) {
1148                 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
1149                 /* wait for the previous p2p_scan to complete */
1150                 res = 0; /* do not report failure */
1151         } else if (res != 0) {
1152                 p2p_dbg(p2p, "Failed to start p2p_scan");
1153                 p2p_set_state(p2p, P2P_IDLE);
1154                 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1155         }
1156
1157         return res;
1158 }
1159
1160
1161 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1162 {
1163         p2p_dbg(p2p, "Stopping find");
1164         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1165         p2p_clear_timeout(p2p);
1166         if (p2p->state == P2P_SEARCH)
1167                 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1168         p2p_set_state(p2p, P2P_IDLE);
1169         p2p_free_req_dev_types(p2p);
1170         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1171         if (p2p->go_neg_peer)
1172                 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1173         p2p->go_neg_peer = NULL;
1174         p2p->sd_peer = NULL;
1175         p2p->invite_peer = NULL;
1176         p2p_stop_listen_for_freq(p2p, freq);
1177 }
1178
1179
1180 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1181 {
1182         if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1183                 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1184                 return;
1185         }
1186         if (p2p->in_listen) {
1187                 p2p->in_listen = 0;
1188                 p2p_clear_timeout(p2p);
1189         }
1190         if (p2p->drv_in_listen) {
1191                 /*
1192                  * The driver may not deliver callback to p2p_listen_end()
1193                  * when the operation gets canceled, so clear the internal
1194                  * variable that is tracking driver state.
1195                  */
1196                 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1197                 p2p->drv_in_listen = 0;
1198         }
1199         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1200 }
1201
1202
1203 void p2p_stop_listen(struct p2p_data *p2p)
1204 {
1205         if (p2p->state != P2P_LISTEN_ONLY) {
1206                 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1207                 return;
1208         }
1209
1210         p2p_stop_listen_for_freq(p2p, 0);
1211         p2p_set_state(p2p, P2P_IDLE);
1212 }
1213
1214
1215 void p2p_stop_find(struct p2p_data *p2p)
1216 {
1217         p2p->pending_listen_freq = 0;
1218         p2p_stop_find_for_freq(p2p, 0);
1219 }
1220
1221
1222 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1223                                     unsigned int force_freq,
1224                                     unsigned int pref_freq, int go)
1225 {
1226         u8 op_class, op_channel;
1227         unsigned int freq = force_freq ? force_freq : pref_freq;
1228
1229         p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
1230                 force_freq, pref_freq, go);
1231         if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1232                 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1233                 return -1;
1234         }
1235
1236         if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
1237             (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
1238                                           op_channel))) {
1239                 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1240                         freq, op_class, op_channel);
1241                 return -1;
1242         }
1243
1244         p2p->op_reg_class = op_class;
1245         p2p->op_channel = op_channel;
1246
1247         if (force_freq) {
1248                 p2p->channels.reg_classes = 1;
1249                 p2p->channels.reg_class[0].channels = 1;
1250                 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1251                 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1252         } else {
1253                 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1254                           sizeof(struct p2p_channels));
1255         }
1256
1257         return 0;
1258 }
1259
1260
1261 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1262 {
1263         u8 op_class, op_channel;
1264         const int op_classes_5ghz[] = { 124, 115, 0 };
1265         const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
1266         const int op_classes_vht[] = { 128, 0 };
1267
1268         p2p_dbg(p2p, "Prepare channel best");
1269
1270         if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1271             p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1272             p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1273             == 0) {
1274                 p2p_dbg(p2p, "Select best overall channel as operating channel preference");
1275                 p2p->op_reg_class = op_class;
1276                 p2p->op_channel = op_channel;
1277         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1278                    p2p_supported_freq(p2p, p2p->best_freq_5) &&
1279                    p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1280                    == 0) {
1281                 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1282                 p2p->op_reg_class = op_class;
1283                 p2p->op_channel = op_channel;
1284         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1285                    p2p_supported_freq(p2p, p2p->best_freq_24) &&
1286                    p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1287                                        &op_channel) == 0) {
1288                 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1289                 p2p->op_reg_class = op_class;
1290                 p2p->op_channel = op_channel;
1291         } else if (p2p->cfg->num_pref_chan > 0 &&
1292                    p2p_channels_includes(&p2p->cfg->channels,
1293                                          p2p->cfg->pref_chan[0].op_class,
1294                                          p2p->cfg->pref_chan[0].chan)) {
1295                 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1296                 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1297                 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1298         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
1299                                       &p2p->op_reg_class, &p2p->op_channel) ==
1300                    0) {
1301                 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
1302                         p2p->op_reg_class, p2p->op_channel);
1303         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
1304                                       &p2p->op_reg_class, &p2p->op_channel) ==
1305                    0) {
1306                 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
1307                         p2p->op_reg_class, p2p->op_channel);
1308         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
1309                                       &p2p->op_reg_class, &p2p->op_channel) ==
1310                    0) {
1311                 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
1312                         p2p->op_reg_class, p2p->op_channel);
1313         } else if (p2p_channels_includes(&p2p->cfg->channels,
1314                                          p2p->cfg->op_reg_class,
1315                                          p2p->cfg->op_channel)) {
1316                 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1317                 p2p->op_reg_class = p2p->cfg->op_reg_class;
1318                 p2p->op_channel = p2p->cfg->op_channel;
1319         } else if (p2p_channel_random_social(&p2p->cfg->channels,
1320                                              &p2p->op_reg_class,
1321                                              &p2p->op_channel) == 0) {
1322                 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference",
1323                         p2p->op_reg_class, p2p->op_channel);
1324         } else {
1325                 /* Select any random available channel from the first available
1326                  * operating class */
1327                 p2p_channel_select(&p2p->cfg->channels, NULL,
1328                                    &p2p->op_reg_class,
1329                                    &p2p->op_channel);
1330                 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
1331                         p2p->op_channel, p2p->op_reg_class);
1332         }
1333
1334         os_memcpy(&p2p->channels, &p2p->cfg->channels,
1335                   sizeof(struct p2p_channels));
1336 }
1337
1338
1339 /**
1340  * p2p_prepare_channel - Select operating channel for GO Negotiation
1341  * @p2p: P2P module context from p2p_init()
1342  * @dev: Selected peer device
1343  * @force_freq: Forced frequency in MHz or 0 if not forced
1344  * @pref_freq: Preferred frequency in MHz or 0 if no preference
1345  * @go: Whether the local end will be forced to be GO
1346  * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1347  *
1348  * This function is used to do initial operating channel selection for GO
1349  * Negotiation prior to having received peer information. The selected channel
1350  * may be further optimized in p2p_reselect_channel() once the peer information
1351  * is available.
1352  */
1353 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1354                         unsigned int force_freq, unsigned int pref_freq, int go)
1355 {
1356         p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1357                 force_freq, pref_freq, go);
1358         if (force_freq || pref_freq) {
1359                 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1360                     0)
1361                         return -1;
1362         } else {
1363                 p2p_prepare_channel_best(p2p);
1364         }
1365         p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1366         if (go)
1367                 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1368         else if (!force_freq)
1369                 p2p_channels_union_inplace(&p2p->channels,
1370                                            &p2p->cfg->cli_channels);
1371         p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1372
1373         p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1374                 p2p->op_reg_class, p2p->op_channel,
1375                 force_freq ? " (forced)" : "");
1376
1377         if (force_freq)
1378                 dev->flags |= P2P_DEV_FORCE_FREQ;
1379         else
1380                 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1381
1382         return 0;
1383 }
1384
1385
1386 static void p2p_set_dev_persistent(struct p2p_device *dev,
1387                                    int persistent_group)
1388 {
1389         switch (persistent_group) {
1390         case 0:
1391                 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1392                                 P2P_DEV_PREFER_PERSISTENT_RECONN);
1393                 break;
1394         case 1:
1395                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1396                 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1397                 break;
1398         case 2:
1399                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1400                         P2P_DEV_PREFER_PERSISTENT_RECONN;
1401                 break;
1402         }
1403 }
1404
1405
1406 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1407                 enum p2p_wps_method wps_method,
1408                 int go_intent, const u8 *own_interface_addr,
1409                 unsigned int force_freq, int persistent_group,
1410                 const u8 *force_ssid, size_t force_ssid_len,
1411                 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1412 {
1413         struct p2p_device *dev;
1414
1415         p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1416                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1417                 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1418                 "oob_pw_id=%u",
1419                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1420                 wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
1421
1422         dev = p2p_get_device(p2p, peer_addr);
1423         if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1424                 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1425                         MAC2STR(peer_addr));
1426                 return -1;
1427         }
1428
1429         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1430                                 go_intent == 15) < 0)
1431                 return -1;
1432
1433         if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1434                 if (!(dev->info.dev_capab &
1435                       P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1436                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1437                                 " that is in a group and is not discoverable",
1438                                 MAC2STR(peer_addr));
1439                         return -1;
1440                 }
1441                 if (dev->oper_freq <= 0) {
1442                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1443                                 " with incomplete information",
1444                                 MAC2STR(peer_addr));
1445                         return -1;
1446                 }
1447
1448                 /*
1449                  * First, try to connect directly. If the peer does not
1450                  * acknowledge frames, assume it is sleeping and use device
1451                  * discoverability via the GO at that point.
1452                  */
1453         }
1454
1455         p2p->ssid_set = 0;
1456         if (force_ssid) {
1457                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1458                                   force_ssid, force_ssid_len);
1459                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1460                 p2p->ssid_len = force_ssid_len;
1461                 p2p->ssid_set = 1;
1462         }
1463
1464         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1465         dev->flags &= ~P2P_DEV_USER_REJECTED;
1466         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1467         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1468         if (pd_before_go_neg)
1469                 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1470         else {
1471                 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1472                 /*
1473                  * Assign dialog token and tie breaker here to use the same
1474                  * values in each retry within the same GO Negotiation exchange.
1475                  */
1476                 dev->dialog_token++;
1477                 if (dev->dialog_token == 0)
1478                         dev->dialog_token = 1;
1479                 dev->tie_breaker = p2p->next_tie_breaker;
1480                 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1481         }
1482         dev->connect_reqs = 0;
1483         dev->go_neg_req_sent = 0;
1484         dev->go_state = UNKNOWN_GO;
1485         p2p_set_dev_persistent(dev, persistent_group);
1486         p2p->go_intent = go_intent;
1487         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1488
1489         if (p2p->state != P2P_IDLE)
1490                 p2p_stop_find(p2p);
1491
1492         if (p2p->after_scan_tx) {
1493                 /*
1494                  * We need to drop the pending frame to avoid issues with the
1495                  * new GO Negotiation, e.g., when the pending frame was from a
1496                  * previous attempt at starting a GO Negotiation.
1497                  */
1498                 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1499                 os_free(p2p->after_scan_tx);
1500                 p2p->after_scan_tx = NULL;
1501         }
1502
1503         dev->wps_method = wps_method;
1504         dev->oob_pw_id = oob_pw_id;
1505         dev->status = P2P_SC_SUCCESS;
1506
1507         if (p2p->p2p_scan_running) {
1508                 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1509                 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1510                 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1511                 return 0;
1512         }
1513         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1514
1515         return p2p_connect_send(p2p, dev);
1516 }
1517
1518
1519 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1520                   enum p2p_wps_method wps_method,
1521                   int go_intent, const u8 *own_interface_addr,
1522                   unsigned int force_freq, int persistent_group,
1523                   const u8 *force_ssid, size_t force_ssid_len,
1524                   unsigned int pref_freq, u16 oob_pw_id)
1525 {
1526         struct p2p_device *dev;
1527
1528         p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1529                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1530                 " wps_method=%d  persistent_group=%d oob_pw_id=%u",
1531                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1532                 wps_method, persistent_group, oob_pw_id);
1533
1534         dev = p2p_get_device(p2p, peer_addr);
1535         if (dev == NULL) {
1536                 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1537                         MAC2STR(peer_addr));
1538                 return -1;
1539         }
1540
1541         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1542                                 15) < 0)
1543                 return -1;
1544
1545         p2p->ssid_set = 0;
1546         if (force_ssid) {
1547                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1548                                   force_ssid, force_ssid_len);
1549                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1550                 p2p->ssid_len = force_ssid_len;
1551                 p2p->ssid_set = 1;
1552         }
1553
1554         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1555         dev->flags &= ~P2P_DEV_USER_REJECTED;
1556         dev->go_neg_req_sent = 0;
1557         dev->go_state = UNKNOWN_GO;
1558         p2p_set_dev_persistent(dev, persistent_group);
1559         p2p->go_intent = go_intent;
1560         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1561
1562         dev->wps_method = wps_method;
1563         dev->oob_pw_id = oob_pw_id;
1564         dev->status = P2P_SC_SUCCESS;
1565
1566         return 0;
1567 }
1568
1569
1570 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1571                       struct p2p_device *dev, struct p2p_message *msg)
1572 {
1573         os_get_reltime(&dev->last_seen);
1574
1575         p2p_copy_wps_info(p2p, dev, 0, msg);
1576
1577         if (msg->listen_channel) {
1578                 int freq;
1579                 freq = p2p_channel_to_freq(msg->listen_channel[3],
1580                                            msg->listen_channel[4]);
1581                 if (freq < 0) {
1582                         p2p_dbg(p2p, "Unknown peer Listen channel: "
1583                                 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1584                                 msg->listen_channel[0],
1585                                 msg->listen_channel[1],
1586                                 msg->listen_channel[2],
1587                                 msg->listen_channel[3],
1588                                 msg->listen_channel[4]);
1589                 } else {
1590                         p2p_dbg(p2p, "Update peer " MACSTR
1591                                 " Listen channel: %u -> %u MHz",
1592                                 MAC2STR(dev->info.p2p_device_addr),
1593                                 dev->listen_freq, freq);
1594                         dev->listen_freq = freq;
1595                 }
1596         }
1597
1598         if (msg->wfd_subelems) {
1599                 wpabuf_free(dev->info.wfd_subelems);
1600                 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1601         }
1602
1603         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1604                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1605                 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1606         } else {
1607                 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1608                         MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1609                         "listen_freq=%d",
1610                         MAC2STR(dev->info.p2p_device_addr),
1611                         dev->info.dev_capab, dev->info.group_capab,
1612                         dev->info.device_name, dev->listen_freq);
1613         }
1614
1615         dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1616
1617         if (dev->flags & P2P_DEV_USER_REJECTED) {
1618                 p2p_dbg(p2p, "Do not report rejected device");
1619                 return;
1620         }
1621
1622         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1623                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
1624         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1625 }
1626
1627
1628 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1629 {
1630         os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1631         p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1632         os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1633                   p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1634         *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1635 }
1636
1637
1638 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1639 {
1640         p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
1641         p2p_random(params->passphrase, p2p->cfg->passphrase_len);
1642         return 0;
1643 }
1644
1645
1646 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1647 {
1648         struct p2p_go_neg_results res;
1649         int go = peer->go_state == LOCAL_GO;
1650         struct p2p_channels intersection;
1651
1652         p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1653                 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1654
1655         os_memset(&res, 0, sizeof(res));
1656         res.role_go = go;
1657         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1658         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1659         res.wps_method = peer->wps_method;
1660         if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1661                 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1662                         res.persistent_group = 2;
1663                 else
1664                         res.persistent_group = 1;
1665         }
1666
1667         if (go) {
1668                 /* Setup AP mode for WPS provisioning */
1669                 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1670                                                p2p->op_channel);
1671                 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1672                 res.ssid_len = p2p->ssid_len;
1673                 p2p_random(res.passphrase, p2p->cfg->passphrase_len);
1674         } else {
1675                 res.freq = peer->oper_freq;
1676                 if (p2p->ssid_len) {
1677                         os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1678                         res.ssid_len = p2p->ssid_len;
1679                 }
1680         }
1681
1682         p2p_channels_dump(p2p, "own channels", &p2p->channels);
1683         p2p_channels_dump(p2p, "peer channels", &peer->channels);
1684         p2p_channels_intersect(&p2p->channels, &peer->channels,
1685                                &intersection);
1686         if (go) {
1687                 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1688                 p2p_channels_dump(p2p, "intersection after no-GO removal",
1689                                   &intersection);
1690         }
1691
1692         p2p_channels_to_freqs(&intersection, res.freq_list,
1693                               P2P_MAX_CHANNELS);
1694
1695         res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1696
1697         p2p_clear_timeout(p2p);
1698         p2p->ssid_set = 0;
1699         peer->go_neg_req_sent = 0;
1700         peer->wps_method = WPS_NOT_READY;
1701         peer->oob_pw_id = 0;
1702         wpabuf_free(peer->go_neg_conf);
1703         peer->go_neg_conf = NULL;
1704
1705         p2p_set_state(p2p, P2P_PROVISIONING);
1706         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1707 }
1708
1709
1710 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1711                               const u8 *data, size_t len, int rx_freq)
1712 {
1713         p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1714         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1715
1716         if (len < 1)
1717                 return;
1718
1719         switch (data[0]) {
1720         case P2P_GO_NEG_REQ:
1721                 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1722                 break;
1723         case P2P_GO_NEG_RESP:
1724                 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1725                 break;
1726         case P2P_GO_NEG_CONF:
1727                 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1728                 break;
1729         case P2P_INVITATION_REQ:
1730                 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1731                                            rx_freq);
1732                 break;
1733         case P2P_INVITATION_RESP:
1734                 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1735                 break;
1736         case P2P_PROV_DISC_REQ:
1737                 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1738                 break;
1739         case P2P_PROV_DISC_RESP:
1740                 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1741                 break;
1742         case P2P_DEV_DISC_REQ:
1743                 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1744                 break;
1745         case P2P_DEV_DISC_RESP:
1746                 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1747                 break;
1748         default:
1749                 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1750                         data[0]);
1751                 break;
1752         }
1753 }
1754
1755
1756 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1757                                  const u8 *sa, const u8 *bssid, const u8 *data,
1758                                  size_t len, int freq)
1759 {
1760         if (len < 1)
1761                 return;
1762
1763         switch (data[0]) {
1764         case WLAN_PA_VENDOR_SPECIFIC:
1765                 data++;
1766                 len--;
1767                 if (len < 4)
1768                         return;
1769                 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1770                         return;
1771
1772                 data += 4;
1773                 len -= 4;
1774
1775                 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1776                 break;
1777         case WLAN_PA_GAS_INITIAL_REQ:
1778                 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1779                 break;
1780         case WLAN_PA_GAS_INITIAL_RESP:
1781                 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1782                 break;
1783         case WLAN_PA_GAS_COMEBACK_REQ:
1784                 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1785                 break;
1786         case WLAN_PA_GAS_COMEBACK_RESP:
1787                 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1788                 break;
1789         }
1790 }
1791
1792
1793 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1794                    const u8 *bssid, u8 category,
1795                    const u8 *data, size_t len, int freq)
1796 {
1797         if (category == WLAN_ACTION_PUBLIC) {
1798                 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1799                 return;
1800         }
1801
1802         if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1803                 return;
1804
1805         if (len < 4)
1806                 return;
1807
1808         if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1809                 return;
1810         data += 4;
1811         len -= 4;
1812
1813         /* P2P action frame */
1814         p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1815         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1816
1817         if (len < 1)
1818                 return;
1819         switch (data[0]) {
1820         case P2P_NOA:
1821                 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1822                 /* TODO */
1823                 break;
1824         case P2P_PRESENCE_REQ:
1825                 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1826                 break;
1827         case P2P_PRESENCE_RESP:
1828                 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1829                 break;
1830         case P2P_GO_DISC_REQ:
1831                 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1832                 break;
1833         default:
1834                 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1835                 break;
1836         }
1837 }
1838
1839
1840 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1841 {
1842         struct p2p_data *p2p = eloop_ctx;
1843         if (p2p->go_neg_peer == NULL)
1844                 return;
1845         if (p2p->pending_listen_freq) {
1846                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start");
1847                 p2p->pending_listen_freq = 0;
1848         }
1849         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1850         p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1851         /*
1852          * Set new timeout to make sure a previously set one does not expire
1853          * too quickly while waiting for the GO Negotiation to complete.
1854          */
1855         p2p_set_timeout(p2p, 0, 500000);
1856         p2p_connect_send(p2p, p2p->go_neg_peer);
1857 }
1858
1859
1860 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1861 {
1862         struct p2p_data *p2p = eloop_ctx;
1863         if (p2p->invite_peer == NULL)
1864                 return;
1865         if (p2p->pending_listen_freq) {
1866                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start");
1867                 p2p->pending_listen_freq = 0;
1868         }
1869         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1870         p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
1871                         p2p->invite_dev_pw_id);
1872 }
1873
1874
1875 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1876                                        const u8 *ie, size_t ie_len)
1877 {
1878         struct p2p_message msg;
1879         struct p2p_device *dev;
1880
1881         os_memset(&msg, 0, sizeof(msg));
1882         if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1883         {
1884                 p2p_parse_free(&msg);
1885                 return; /* not a P2P probe */
1886         }
1887
1888         if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
1889             os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
1890             != 0) {
1891                 /* The Probe Request is not part of P2P Device Discovery. It is
1892                  * not known whether the source address of the frame is the P2P
1893                  * Device Address or P2P Interface Address. Do not add a new
1894                  * peer entry based on this frames.
1895                  */
1896                 p2p_parse_free(&msg);
1897                 return;
1898         }
1899
1900         dev = p2p_get_device(p2p, addr);
1901         if (dev) {
1902                 if (dev->country[0] == 0 && msg.listen_channel)
1903                         os_memcpy(dev->country, msg.listen_channel, 3);
1904                 os_get_reltime(&dev->last_seen);
1905                 p2p_parse_free(&msg);
1906                 return; /* already known */
1907         }
1908
1909         dev = p2p_create_device(p2p, addr);
1910         if (dev == NULL) {
1911                 p2p_parse_free(&msg);
1912                 return;
1913         }
1914
1915         os_get_reltime(&dev->last_seen);
1916         dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
1917
1918         if (msg.listen_channel) {
1919                 os_memcpy(dev->country, msg.listen_channel, 3);
1920                 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
1921                                                        msg.listen_channel[4]);
1922         }
1923
1924         p2p_copy_wps_info(p2p, dev, 1, &msg);
1925
1926         if (msg.wfd_subelems) {
1927                 wpabuf_free(dev->info.wfd_subelems);
1928                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
1929         }
1930
1931         p2p_parse_free(&msg);
1932
1933         p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
1934                 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
1935                 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
1936                 dev->info.group_capab, dev->info.device_name,
1937                 dev->listen_freq);
1938 }
1939
1940
1941 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
1942                                                 const u8 *addr,
1943                                                 struct p2p_message *msg)
1944 {
1945         struct p2p_device *dev;
1946
1947         dev = p2p_get_device(p2p, addr);
1948         if (dev) {
1949                 os_get_reltime(&dev->last_seen);
1950                 return dev; /* already known */
1951         }
1952
1953         dev = p2p_create_device(p2p, addr);
1954         if (dev == NULL)
1955                 return NULL;
1956
1957         p2p_add_dev_info(p2p, addr, dev, msg);
1958
1959         return dev;
1960 }
1961
1962
1963 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
1964 {
1965         if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
1966                 return 1;
1967         if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
1968             WPA_GET_BE32(&req_dev_type[2]) == 0 &&
1969             WPA_GET_BE16(&req_dev_type[6]) == 0)
1970                 return 1; /* Category match with wildcard OUI/sub-category */
1971         return 0;
1972 }
1973
1974
1975 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
1976                         size_t num_req_dev_type)
1977 {
1978         size_t i;
1979         for (i = 0; i < num_req_dev_type; i++) {
1980                 if (dev_type_match(dev_type, req_dev_type[i]))
1981                         return 1;
1982         }
1983         return 0;
1984 }
1985
1986
1987 /**
1988  * p2p_match_dev_type - Match local device type with requested type
1989  * @p2p: P2P module context from p2p_init()
1990  * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
1991  * Returns: 1 on match, 0 on mismatch
1992  *
1993  * This function can be used to match the Requested Device Type attribute in
1994  * WPS IE with the local device types for deciding whether to reply to a Probe
1995  * Request frame.
1996  */
1997 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
1998 {
1999         struct wps_parse_attr attr;
2000         size_t i;
2001
2002         if (wps_parse_msg(wps, &attr))
2003                 return 1; /* assume no Requested Device Type attributes */
2004
2005         if (attr.num_req_dev_type == 0)
2006                 return 1; /* no Requested Device Type attributes -> match */
2007
2008         if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
2009                                 attr.num_req_dev_type))
2010                 return 1; /* Own Primary Device Type matches */
2011
2012         for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) {
2013                 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
2014                                         attr.req_dev_type,
2015                                         attr.num_req_dev_type))
2016                         return 1; /* Own Secondary Device Type matches */
2017         }
2018
2019         /* No matching device type found */
2020         return 0;
2021 }
2022
2023
2024 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
2025 {
2026         struct wpabuf *buf;
2027         u8 *len;
2028         int pw_id = -1;
2029         size_t extra = 0;
2030
2031 #ifdef CONFIG_WIFI_DISPLAY
2032         if (p2p->wfd_ie_probe_resp)
2033                 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
2034 #endif /* CONFIG_WIFI_DISPLAY */
2035
2036         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2037                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2038
2039         buf = wpabuf_alloc(1000 + extra);
2040         if (buf == NULL)
2041                 return NULL;
2042
2043         if (p2p->go_neg_peer) {
2044                 /* Advertise immediate availability of WPS credential */
2045                 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
2046         }
2047
2048         if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
2049                 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
2050                 wpabuf_free(buf);
2051                 return NULL;
2052         }
2053
2054 #ifdef CONFIG_WIFI_DISPLAY
2055         if (p2p->wfd_ie_probe_resp)
2056                 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
2057 #endif /* CONFIG_WIFI_DISPLAY */
2058
2059         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2060                 wpabuf_put_buf(buf,
2061                                p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2062
2063         /* P2P IE */
2064         len = p2p_buf_add_ie_hdr(buf);
2065         p2p_buf_add_capability(buf, p2p->dev_capab &
2066                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2067         if (p2p->ext_listen_interval)
2068                 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
2069                                               p2p->ext_listen_interval);
2070         p2p_buf_add_device_info(buf, p2p, NULL);
2071         p2p_buf_update_ie_hdr(buf, len);
2072
2073         return buf;
2074 }
2075
2076
2077 static enum p2p_probe_req_status
2078 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2079                 const u8 *bssid, const u8 *ie, size_t ie_len)
2080 {
2081         struct ieee802_11_elems elems;
2082         struct wpabuf *buf;
2083         struct ieee80211_mgmt *resp;
2084         struct p2p_message msg;
2085         struct wpabuf *ies;
2086
2087         if (!p2p->in_listen || !p2p->drv_in_listen) {
2088                 /* not in Listen state - ignore Probe Request */
2089                 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
2090                         p2p->in_listen, p2p->drv_in_listen);
2091                 return P2P_PREQ_NOT_LISTEN;
2092         }
2093
2094         if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
2095             ParseFailed) {
2096                 /* Ignore invalid Probe Request frames */
2097                 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
2098                 return P2P_PREQ_MALFORMED;
2099         }
2100
2101         if (elems.p2p == NULL) {
2102                 /* not a P2P probe - ignore it */
2103                 p2p_dbg(p2p, "Not a P2P probe - ignore it");
2104                 return P2P_PREQ_NOT_P2P;
2105         }
2106
2107         if (dst && !is_broadcast_ether_addr(dst) &&
2108             os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2109                 /* Not sent to the broadcast address or our P2P Device Address
2110                  */
2111                 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2112                         MAC2STR(dst));
2113                 return P2P_PREQ_NOT_PROCESSED;
2114         }
2115
2116         if (bssid && !is_broadcast_ether_addr(bssid)) {
2117                 /* Not sent to the Wildcard BSSID */
2118                 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2119                         MAC2STR(bssid));
2120                 return P2P_PREQ_NOT_PROCESSED;
2121         }
2122
2123         if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2124             os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2125             0) {
2126                 /* not using P2P Wildcard SSID - ignore */
2127                 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2128                 return P2P_PREQ_NOT_PROCESSED;
2129         }
2130
2131         if (supp_rates_11b_only(&elems)) {
2132                 /* Indicates support for 11b rates only */
2133                 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2134                 return P2P_PREQ_NOT_P2P;
2135         }
2136
2137         os_memset(&msg, 0, sizeof(msg));
2138         if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2139                 /* Could not parse P2P attributes */
2140                 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2141                 return P2P_PREQ_NOT_P2P;
2142         }
2143
2144         if (msg.device_id &&
2145             os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2146                 /* Device ID did not match */
2147                 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2148                         MAC2STR(msg.device_id));
2149                 p2p_parse_free(&msg);
2150                 return P2P_PREQ_NOT_PROCESSED;
2151         }
2152
2153         /* Check Requested Device Type match */
2154         if (msg.wps_attributes &&
2155             !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2156                 /* No match with Requested Device Type */
2157                 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2158                 p2p_parse_free(&msg);
2159                 return P2P_PREQ_NOT_PROCESSED;
2160         }
2161         p2p_parse_free(&msg);
2162
2163         if (!p2p->cfg->send_probe_resp) {
2164                 /* Response generated elsewhere */
2165                 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2166                 return P2P_PREQ_NOT_PROCESSED;
2167         }
2168
2169         p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2170
2171         /*
2172          * We do not really have a specific BSS that this frame is advertising,
2173          * so build a frame that has some information in valid format. This is
2174          * really only used for discovery purposes, not to learn exact BSS
2175          * parameters.
2176          */
2177         ies = p2p_build_probe_resp_ies(p2p);
2178         if (ies == NULL)
2179                 return P2P_PREQ_NOT_PROCESSED;
2180
2181         buf = wpabuf_alloc(200 + wpabuf_len(ies));
2182         if (buf == NULL) {
2183                 wpabuf_free(ies);
2184                 return P2P_PREQ_NOT_PROCESSED;
2185         }
2186
2187         resp = NULL;
2188         resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
2189
2190         resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2191                                            (WLAN_FC_STYPE_PROBE_RESP << 4));
2192         os_memcpy(resp->da, addr, ETH_ALEN);
2193         os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2194         os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2195         resp->u.probe_resp.beacon_int = host_to_le16(100);
2196         /* hardware or low-level driver will setup seq_ctrl and timestamp */
2197         resp->u.probe_resp.capab_info =
2198                 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2199                              WLAN_CAPABILITY_PRIVACY |
2200                              WLAN_CAPABILITY_SHORT_SLOT_TIME);
2201
2202         wpabuf_put_u8(buf, WLAN_EID_SSID);
2203         wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2204         wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2205
2206         wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2207         wpabuf_put_u8(buf, 8);
2208         wpabuf_put_u8(buf, (60 / 5) | 0x80);
2209         wpabuf_put_u8(buf, 90 / 5);
2210         wpabuf_put_u8(buf, (120 / 5) | 0x80);
2211         wpabuf_put_u8(buf, 180 / 5);
2212         wpabuf_put_u8(buf, (240 / 5) | 0x80);
2213         wpabuf_put_u8(buf, 360 / 5);
2214         wpabuf_put_u8(buf, 480 / 5);
2215         wpabuf_put_u8(buf, 540 / 5);
2216
2217         wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2218         wpabuf_put_u8(buf, 1);
2219         wpabuf_put_u8(buf, p2p->cfg->channel);
2220
2221         wpabuf_put_buf(buf, ies);
2222         wpabuf_free(ies);
2223
2224         p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
2225
2226         wpabuf_free(buf);
2227
2228         return P2P_PREQ_NOT_PROCESSED;
2229 }
2230
2231
2232 enum p2p_probe_req_status
2233 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2234                  const u8 *bssid, const u8 *ie, size_t ie_len)
2235 {
2236         enum p2p_probe_req_status res;
2237
2238         p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2239
2240         res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
2241
2242         if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2243             p2p->go_neg_peer &&
2244             os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2245             == 0 &&
2246             !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2247                 /* Received a Probe Request from GO Negotiation peer */
2248                 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2249                 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2250                 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2251                 return P2P_PREQ_PROCESSED;
2252         }
2253
2254         if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2255             p2p->invite_peer &&
2256             (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2257             os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2258             == 0) {
2259                 /* Received a Probe Request from Invite peer */
2260                 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2261                 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2262                 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2263                 return P2P_PREQ_PROCESSED;
2264         }
2265
2266         return res;
2267 }
2268
2269
2270 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2271                                     u8 *buf, size_t len, struct wpabuf *p2p_ie)
2272 {
2273         struct wpabuf *tmp;
2274         u8 *lpos;
2275         size_t tmplen;
2276         int res;
2277         u8 group_capab;
2278
2279         if (p2p_ie == NULL)
2280                 return 0; /* WLAN AP is not a P2P manager */
2281
2282         /*
2283          * (Re)Association Request - P2P IE
2284          * P2P Capability attribute (shall be present)
2285          * P2P Interface attribute (present if concurrent device and
2286          *      P2P Management is enabled)
2287          */
2288         tmp = wpabuf_alloc(200);
2289         if (tmp == NULL)
2290                 return -1;
2291
2292         lpos = p2p_buf_add_ie_hdr(tmp);
2293         group_capab = 0;
2294         if (p2p->num_groups > 0) {
2295                 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2296                 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2297                     (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2298                     p2p->cross_connect)
2299                         group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2300         }
2301         p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2302         if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2303             (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2304                 p2p_buf_add_p2p_interface(tmp, p2p);
2305         p2p_buf_update_ie_hdr(tmp, lpos);
2306
2307         tmplen = wpabuf_len(tmp);
2308         if (tmplen > len)
2309                 res = -1;
2310         else {
2311                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2312                 res = tmplen;
2313         }
2314         wpabuf_free(tmp);
2315
2316         return res;
2317 }
2318
2319
2320 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2321                      size_t len, int p2p_group, struct wpabuf *p2p_ie)
2322 {
2323         struct wpabuf *tmp;
2324         u8 *lpos;
2325         struct p2p_device *peer;
2326         size_t tmplen;
2327         int res;
2328         size_t extra = 0;
2329
2330         if (!p2p_group)
2331                 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2332
2333 #ifdef CONFIG_WIFI_DISPLAY
2334         if (p2p->wfd_ie_assoc_req)
2335                 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2336 #endif /* CONFIG_WIFI_DISPLAY */
2337
2338         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2339                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2340
2341         /*
2342          * (Re)Association Request - P2P IE
2343          * P2P Capability attribute (shall be present)
2344          * Extended Listen Timing (may be present)
2345          * P2P Device Info attribute (shall be present)
2346          */
2347         tmp = wpabuf_alloc(200 + extra);
2348         if (tmp == NULL)
2349                 return -1;
2350
2351 #ifdef CONFIG_WIFI_DISPLAY
2352         if (p2p->wfd_ie_assoc_req)
2353                 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2354 #endif /* CONFIG_WIFI_DISPLAY */
2355
2356         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2357                 wpabuf_put_buf(tmp,
2358                                p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2359
2360         peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2361
2362         lpos = p2p_buf_add_ie_hdr(tmp);
2363         p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2364         if (p2p->ext_listen_interval)
2365                 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2366                                               p2p->ext_listen_interval);
2367         p2p_buf_add_device_info(tmp, p2p, peer);
2368         p2p_buf_update_ie_hdr(tmp, lpos);
2369
2370         tmplen = wpabuf_len(tmp);
2371         if (tmplen > len)
2372                 res = -1;
2373         else {
2374                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2375                 res = tmplen;
2376         }
2377         wpabuf_free(tmp);
2378
2379         return res;
2380 }
2381
2382
2383 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2384 {
2385         struct wpabuf *p2p_ie;
2386         int ret;
2387
2388         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2389         if (p2p_ie == NULL)
2390                 return 0;
2391
2392         ret = p2p_attr_text(p2p_ie, buf, end);
2393         wpabuf_free(p2p_ie);
2394         return ret;
2395 }
2396
2397
2398 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2399 {
2400         struct p2p_message msg;
2401
2402         os_memset(&msg, 0, sizeof(msg));
2403         if (p2p_parse_p2p_ie(p2p_ie, &msg))
2404                 return -1;
2405
2406         if (msg.p2p_device_addr) {
2407                 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2408                 return 0;
2409         } else if (msg.device_id) {
2410                 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2411                 return 0;
2412         }
2413         return -1;
2414 }
2415
2416
2417 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2418 {
2419         struct wpabuf *p2p_ie;
2420         int ret;
2421
2422         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2423                                              P2P_IE_VENDOR_TYPE);
2424         if (p2p_ie == NULL)
2425                 return -1;
2426         ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2427         wpabuf_free(p2p_ie);
2428         return ret;
2429 }
2430
2431
2432 static void p2p_clear_go_neg(struct p2p_data *p2p)
2433 {
2434         p2p->go_neg_peer = NULL;
2435         p2p_clear_timeout(p2p);
2436         p2p_set_state(p2p, P2P_IDLE);
2437 }
2438
2439
2440 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2441 {
2442         if (p2p->go_neg_peer == NULL) {
2443                 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2444                 return; /* No pending Group Formation */
2445         }
2446
2447         if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2448             0) {
2449                 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2450                         MACSTR " (GO Negotiation peer " MACSTR ")",
2451                         MAC2STR(mac_addr),
2452                         MAC2STR(p2p->go_neg_peer->intended_addr));
2453                 return; /* Ignore unexpected peer address */
2454         }
2455
2456         p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2457                 MAC2STR(mac_addr));
2458
2459         p2p_clear_go_neg(p2p);
2460 }
2461
2462
2463 void p2p_group_formation_failed(struct p2p_data *p2p)
2464 {
2465         if (p2p->go_neg_peer == NULL) {
2466                 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2467                 return; /* No pending Group Formation */
2468         }
2469
2470         p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2471                 MAC2STR(p2p->go_neg_peer->intended_addr));
2472
2473         p2p_clear_go_neg(p2p);
2474 }
2475
2476
2477 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2478 {
2479         struct p2p_data *p2p;
2480
2481         if (cfg->max_peers < 1 ||
2482             cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
2483                 return NULL;
2484
2485         p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2486         if (p2p == NULL)
2487                 return NULL;
2488         p2p->cfg = (struct p2p_config *) (p2p + 1);
2489         os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2490         if (cfg->dev_name)
2491                 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2492         if (cfg->manufacturer)
2493                 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2494         if (cfg->model_name)
2495                 p2p->cfg->model_name = os_strdup(cfg->model_name);
2496         if (cfg->model_number)
2497                 p2p->cfg->model_number = os_strdup(cfg->model_number);
2498         if (cfg->serial_number)
2499                 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2500         if (cfg->pref_chan) {
2501                 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2502                                                 sizeof(struct p2p_channel));
2503                 if (p2p->cfg->pref_chan) {
2504                         os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2505                                   cfg->num_pref_chan *
2506                                   sizeof(struct p2p_channel));
2507                 } else
2508                         p2p->cfg->num_pref_chan = 0;
2509         }
2510
2511         p2p->min_disc_int = 1;
2512         p2p->max_disc_int = 3;
2513         p2p->max_disc_tu = -1;
2514
2515         if (os_get_random(&p2p->next_tie_breaker, 1) < 0)
2516                 p2p->next_tie_breaker = 0;
2517         p2p->next_tie_breaker &= 0x01;
2518         if (cfg->sd_request)
2519                 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2520         p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2521         if (cfg->concurrent_operations)
2522                 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2523         p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2524
2525         dl_list_init(&p2p->devices);
2526
2527         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2528                                p2p_expiration_timeout, p2p, NULL);
2529
2530         p2p->go_timeout = 100;
2531         p2p->client_timeout = 20;
2532         p2p->num_p2p_sd_queries = 0;
2533
2534         p2p_dbg(p2p, "initialized");
2535         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2536         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2537
2538         return p2p;
2539 }
2540
2541
2542 void p2p_deinit(struct p2p_data *p2p)
2543 {
2544 #ifdef CONFIG_WIFI_DISPLAY
2545         wpabuf_free(p2p->wfd_ie_beacon);
2546         wpabuf_free(p2p->wfd_ie_probe_req);
2547         wpabuf_free(p2p->wfd_ie_probe_resp);
2548         wpabuf_free(p2p->wfd_ie_assoc_req);
2549         wpabuf_free(p2p->wfd_ie_invitation);
2550         wpabuf_free(p2p->wfd_ie_prov_disc_req);
2551         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2552         wpabuf_free(p2p->wfd_ie_go_neg);
2553         wpabuf_free(p2p->wfd_dev_info);
2554         wpabuf_free(p2p->wfd_assoc_bssid);
2555         wpabuf_free(p2p->wfd_coupled_sink_info);
2556 #endif /* CONFIG_WIFI_DISPLAY */
2557
2558         eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2559         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2560         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2561         eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2562         eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2563         p2p_flush(p2p);
2564         p2p_free_req_dev_types(p2p);
2565         os_free(p2p->cfg->dev_name);
2566         os_free(p2p->cfg->manufacturer);
2567         os_free(p2p->cfg->model_name);
2568         os_free(p2p->cfg->model_number);
2569         os_free(p2p->cfg->serial_number);
2570         os_free(p2p->cfg->pref_chan);
2571         os_free(p2p->groups);
2572         wpabuf_free(p2p->sd_resp);
2573         os_free(p2p->after_scan_tx);
2574         p2p_remove_wps_vendor_extensions(p2p);
2575         os_free(p2p->no_go_freq.range);
2576         os_free(p2p);
2577 }
2578
2579
2580 void p2p_flush(struct p2p_data *p2p)
2581 {
2582         struct p2p_device *dev, *prev;
2583         p2p_stop_find(p2p);
2584         dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2585                               list) {
2586                 dl_list_del(&dev->list);
2587                 p2p_device_free(p2p, dev);
2588         }
2589         p2p_free_sd_queries(p2p);
2590         os_free(p2p->after_scan_tx);
2591         p2p->after_scan_tx = NULL;
2592 }
2593
2594
2595 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2596 {
2597         struct p2p_device *dev;
2598
2599         dev = p2p_get_device(p2p, addr);
2600         if (dev == NULL)
2601                 return -1;
2602
2603         p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
2604
2605         if (p2p->go_neg_peer == dev) {
2606                 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2607                 p2p->go_neg_peer = NULL;
2608         }
2609
2610         dev->wps_method = WPS_NOT_READY;
2611         dev->oob_pw_id = 0;
2612         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
2613         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
2614
2615         /* Check if after_scan_tx is for this peer. If so free it */
2616         if (p2p->after_scan_tx &&
2617             os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
2618                 os_free(p2p->after_scan_tx);
2619                 p2p->after_scan_tx = NULL;
2620         }
2621
2622         return 0;
2623 }
2624
2625
2626 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
2627 {
2628         os_free(p2p->cfg->dev_name);
2629         if (dev_name) {
2630                 p2p->cfg->dev_name = os_strdup(dev_name);
2631                 if (p2p->cfg->dev_name == NULL)
2632                         return -1;
2633         } else
2634                 p2p->cfg->dev_name = NULL;
2635         return 0;
2636 }
2637
2638
2639 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
2640 {
2641         os_free(p2p->cfg->manufacturer);
2642         p2p->cfg->manufacturer = NULL;
2643         if (manufacturer) {
2644                 p2p->cfg->manufacturer = os_strdup(manufacturer);
2645                 if (p2p->cfg->manufacturer == NULL)
2646                         return -1;
2647         }
2648
2649         return 0;
2650 }
2651
2652
2653 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
2654 {
2655         os_free(p2p->cfg->model_name);
2656         p2p->cfg->model_name = NULL;
2657         if (model_name) {
2658                 p2p->cfg->model_name = os_strdup(model_name);
2659                 if (p2p->cfg->model_name == NULL)
2660                         return -1;
2661         }
2662
2663         return 0;
2664 }
2665
2666
2667 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
2668 {
2669         os_free(p2p->cfg->model_number);
2670         p2p->cfg->model_number = NULL;
2671         if (model_number) {
2672                 p2p->cfg->model_number = os_strdup(model_number);
2673                 if (p2p->cfg->model_number == NULL)
2674                         return -1;
2675         }
2676
2677         return 0;
2678 }
2679
2680
2681 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
2682 {
2683         os_free(p2p->cfg->serial_number);
2684         p2p->cfg->serial_number = NULL;
2685         if (serial_number) {
2686                 p2p->cfg->serial_number = os_strdup(serial_number);
2687                 if (p2p->cfg->serial_number == NULL)
2688                         return -1;
2689         }
2690
2691         return 0;
2692 }
2693
2694
2695 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
2696 {
2697         p2p->cfg->config_methods = config_methods;
2698 }
2699
2700
2701 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
2702 {
2703         os_memcpy(p2p->cfg->uuid, uuid, 16);
2704 }
2705
2706
2707 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
2708 {
2709         os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
2710         return 0;
2711 }
2712
2713
2714 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
2715                           size_t num_dev_types)
2716 {
2717         if (num_dev_types > P2P_SEC_DEVICE_TYPES)
2718                 num_dev_types = P2P_SEC_DEVICE_TYPES;
2719         p2p->cfg->num_sec_dev_types = num_dev_types;
2720         os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
2721         return 0;
2722 }
2723
2724
2725 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
2726 {
2727         int i;
2728
2729         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2730                 wpabuf_free(p2p->wps_vendor_ext[i]);
2731                 p2p->wps_vendor_ext[i] = NULL;
2732         }
2733 }
2734
2735
2736 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
2737                                  const struct wpabuf *vendor_ext)
2738 {
2739         int i;
2740
2741         if (vendor_ext == NULL)
2742                 return -1;
2743
2744         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2745                 if (p2p->wps_vendor_ext[i] == NULL)
2746                         break;
2747         }
2748         if (i >= P2P_MAX_WPS_VENDOR_EXT)
2749                 return -1;
2750
2751         p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
2752         if (p2p->wps_vendor_ext[i] == NULL)
2753                 return -1;
2754
2755         return 0;
2756 }
2757
2758
2759 int p2p_set_country(struct p2p_data *p2p, const char *country)
2760 {
2761         os_memcpy(p2p->cfg->country, country, 3);
2762         return 0;
2763 }
2764
2765
2766 static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev)
2767 {
2768         if (dev->sd_pending_bcast_queries == 0) {
2769                 /* Initialize with total number of registered broadcast
2770                  * SD queries. */
2771                 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
2772         }
2773
2774         if (p2p_start_sd(p2p, dev) == 0)
2775                 return 1;
2776
2777         if (dev->req_config_methods &&
2778             !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
2779                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2780                         MACSTR " (config methods 0x%x)",
2781                         MAC2STR(dev->info.p2p_device_addr),
2782                         dev->req_config_methods);
2783                 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
2784                         return 1;
2785         }
2786
2787         return 0;
2788 }
2789
2790
2791 void p2p_continue_find(struct p2p_data *p2p)
2792 {
2793         struct p2p_device *dev;
2794         int found;
2795
2796         p2p_set_state(p2p, P2P_SEARCH);
2797
2798         /* Continue from the device following the last iteration */
2799         found = 0;
2800         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2801                 if (dev == p2p->last_p2p_find_oper) {
2802                         found = 1;
2803                         continue;
2804                 }
2805                 if (!found)
2806                         continue;
2807                 if (p2p_pre_find_operation(p2p, dev) > 0) {
2808                         p2p->last_p2p_find_oper = dev;
2809                         return;
2810                 }
2811         }
2812
2813         /*
2814          * Wrap around to the beginning of the list and continue until the last
2815          * iteration device.
2816          */
2817         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2818                 if (p2p_pre_find_operation(p2p, dev) > 0) {
2819                         p2p->last_p2p_find_oper = dev;
2820                         return;
2821                 }
2822                 if (dev == p2p->last_p2p_find_oper)
2823                         break;
2824         }
2825
2826         p2p_listen_in_find(p2p, 1);
2827 }
2828
2829
2830 static void p2p_sd_cb(struct p2p_data *p2p, int success)
2831 {
2832         p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
2833                 success);
2834         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2835
2836         if (!success) {
2837                 if (p2p->sd_peer)
2838                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
2839                 p2p->sd_peer = NULL;
2840                 p2p_continue_find(p2p);
2841                 return;
2842         }
2843
2844         if (p2p->sd_peer == NULL) {
2845                 p2p_dbg(p2p, "No SD peer entry known");
2846                 p2p_continue_find(p2p);
2847                 return;
2848         }
2849
2850         if (p2p->sd_query->for_all_peers) {
2851                 /* Update the pending broadcast SD query count for this device
2852                  */
2853                 p2p->sd_peer->sd_pending_bcast_queries--;
2854
2855                 /*
2856                  * If there are no pending broadcast queries for this device,
2857                  * mark it as done (-1).
2858                  */
2859                 if (p2p->sd_peer->sd_pending_bcast_queries == 0)
2860                         p2p->sd_peer->sd_pending_bcast_queries = -1;
2861         }
2862
2863         /* Wait for response from the peer */
2864         p2p_set_state(p2p, P2P_SD_DURING_FIND);
2865         p2p_set_timeout(p2p, 0, 200000);
2866 }
2867
2868
2869 /**
2870  * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
2871  * @p2p: P2P module context from p2p_init()
2872  */
2873 static void p2p_retry_pd(struct p2p_data *p2p)
2874 {
2875         struct p2p_device *dev;
2876
2877         if (p2p->state != P2P_IDLE)
2878                 return;
2879
2880         /*
2881          * Retry the prov disc req attempt only for the peer that the user had
2882          * requested.
2883          */
2884
2885         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2886                 if (os_memcmp(p2p->pending_pd_devaddr,
2887                               dev->info.p2p_device_addr, ETH_ALEN) != 0)
2888                         continue;
2889                 if (!dev->req_config_methods)
2890                         continue;
2891
2892                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2893                         MACSTR " (config methods 0x%x)",
2894                         MAC2STR(dev->info.p2p_device_addr),
2895                         dev->req_config_methods);
2896                 p2p_send_prov_disc_req(p2p, dev,
2897                                        dev->flags & P2P_DEV_PD_FOR_JOIN,
2898                                        p2p->pd_force_freq);
2899                 return;
2900         }
2901 }
2902
2903
2904 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
2905 {
2906         p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
2907                 success);
2908
2909         /*
2910          * Postpone resetting the pending action state till after we actually
2911          * time out. This allows us to take some action like notifying any
2912          * interested parties about no response to the request.
2913          *
2914          * When the timer (below) goes off we check in IDLE, SEARCH, or
2915          * LISTEN_ONLY state, which are the only allowed states to issue a PD
2916          * requests in, if this was still pending and then raise notification.
2917          */
2918
2919         if (!success) {
2920                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2921
2922                 if (p2p->user_initiated_pd &&
2923                     (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
2924                 {
2925                         /* Retry request from timeout to avoid busy loops */
2926                         p2p->pending_action_state = P2P_PENDING_PD;
2927                         p2p_set_timeout(p2p, 0, 50000);
2928                 } else if (p2p->state != P2P_IDLE)
2929                         p2p_continue_find(p2p);
2930                 else if (p2p->user_initiated_pd) {
2931                         p2p->pending_action_state = P2P_PENDING_PD;
2932                         p2p_set_timeout(p2p, 0, 300000);
2933                 }
2934                 return;
2935         }
2936
2937         /*
2938          * This postponing, of resetting pending_action_state, needs to be
2939          * done only for user initiated PD requests and not internal ones.
2940          */
2941         if (p2p->user_initiated_pd)
2942                 p2p->pending_action_state = P2P_PENDING_PD;
2943         else
2944                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2945
2946         /* Wait for response from the peer */
2947         if (p2p->state == P2P_SEARCH)
2948                 p2p_set_state(p2p, P2P_PD_DURING_FIND);
2949         p2p_set_timeout(p2p, 0, 200000);
2950 }
2951
2952
2953 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
2954                          struct os_reltime *rx_time, int level, const u8 *ies,
2955                          size_t ies_len)
2956 {
2957         if (os_reltime_before(rx_time, &p2p->find_start)) {
2958                 /*
2959                  * The driver may have cached (e.g., in cfg80211 BSS table) the
2960                  * scan results for relatively long time. To avoid reporting
2961                  * stale information, update P2P peers only based on results
2962                  * that have based on frames received after the last p2p_find
2963                  * operation was started.
2964                  */
2965                 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
2966                         " (rx_time=%u.%06u)",
2967                         MAC2STR(bssid), (unsigned int) rx_time->sec,
2968                         (unsigned int) rx_time->usec);
2969                 return 0;
2970         }
2971
2972         p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
2973
2974         return 0;
2975 }
2976
2977
2978 void p2p_scan_res_handled(struct p2p_data *p2p)
2979 {
2980         if (!p2p->p2p_scan_running) {
2981                 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
2982         }
2983         p2p->p2p_scan_running = 0;
2984         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2985
2986         if (p2p_run_after_scan(p2p))
2987                 return;
2988         if (p2p->state == P2P_SEARCH)
2989                 p2p_continue_find(p2p);
2990 }
2991
2992
2993 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
2994 {
2995         u8 *len;
2996
2997 #ifdef CONFIG_WIFI_DISPLAY
2998         if (p2p->wfd_ie_probe_req)
2999                 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
3000 #endif /* CONFIG_WIFI_DISPLAY */
3001
3002         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3003                 wpabuf_put_buf(ies,
3004                                p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3005
3006         len = p2p_buf_add_ie_hdr(ies);
3007         p2p_buf_add_capability(ies, p2p->dev_capab &
3008                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
3009         if (dev_id)
3010                 p2p_buf_add_device_id(ies, dev_id);
3011         if (p2p->cfg->reg_class && p2p->cfg->channel)
3012                 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
3013                                            p2p->cfg->reg_class,
3014                                            p2p->cfg->channel);
3015         if (p2p->ext_listen_interval)
3016                 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
3017                                               p2p->ext_listen_interval);
3018         /* TODO: p2p_buf_add_operating_channel() if GO */
3019         p2p_buf_update_ie_hdr(ies, len);
3020 }
3021
3022
3023 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
3024 {
3025         size_t len = 100;
3026
3027 #ifdef CONFIG_WIFI_DISPLAY
3028         if (p2p && p2p->wfd_ie_probe_req)
3029                 len += wpabuf_len(p2p->wfd_ie_probe_req);
3030 #endif /* CONFIG_WIFI_DISPLAY */
3031
3032         if (p2p && p2p->vendor_elem &&
3033             p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3034                 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3035
3036         return len;
3037 }
3038
3039
3040 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
3041 {
3042         return p2p_attr_text(p2p_ie, buf, end);
3043 }
3044
3045
3046 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
3047 {
3048         struct p2p_device *dev = p2p->go_neg_peer;
3049         int timeout;
3050
3051         p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
3052
3053         if (dev == NULL) {
3054                 p2p_dbg(p2p, "No pending GO Negotiation");
3055                 return;
3056         }
3057
3058         if (success) {
3059                 if (dev->flags & P2P_DEV_USER_REJECTED) {
3060                         p2p_set_state(p2p, P2P_IDLE);
3061                         return;
3062                 }
3063         } else if (dev->go_neg_req_sent) {
3064                 /* Cancel the increment from p2p_connect_send() on failure */
3065                 dev->go_neg_req_sent--;
3066         }
3067
3068         if (!success &&
3069             (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
3070             !is_zero_ether_addr(dev->member_in_go_dev)) {
3071                 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
3072                         MAC2STR(dev->info.p2p_device_addr));
3073                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3074                 p2p_send_dev_disc_req(p2p, dev);
3075                 return;
3076         }
3077
3078         /*
3079          * Use P2P find, if needed, to find the other device from its listen
3080          * channel.
3081          */
3082         p2p_set_state(p2p, P2P_CONNECT);
3083         timeout = success ? 500000 : 100000;
3084         if (!success && p2p->go_neg_peer &&
3085             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
3086                 unsigned int r;
3087                 /*
3088                  * Peer is expected to wait our response and we will skip the
3089                  * listen phase. Add some randomness to the wait time here to
3090                  * make it less likely to hit cases where we could end up in
3091                  * sync with peer not listening.
3092                  */
3093                 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
3094                         r = 0;
3095                 timeout += r % 100000;
3096         }
3097         p2p_set_timeout(p2p, 0, timeout);
3098 }
3099
3100
3101 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
3102 {
3103         p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
3104                 success);
3105         if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
3106                 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
3107                 return;
3108         }
3109         p2p_set_state(p2p, P2P_CONNECT);
3110         p2p_set_timeout(p2p, 0, 500000);
3111 }
3112
3113
3114 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
3115                                        const u8 *addr)
3116 {
3117         p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
3118         if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
3119                 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status);
3120         } else if (success) {
3121                 struct p2p_device *dev;
3122                 dev = p2p_get_device(p2p, addr);
3123                 if (dev &&
3124                     dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
3125                         dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
3126         }
3127 }
3128
3129
3130 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
3131                                enum p2p_send_action_result result)
3132 {
3133         struct p2p_device *dev;
3134
3135         p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
3136         if (result == P2P_SEND_ACTION_FAILED) {
3137                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3138                 p2p_go_neg_failed(p2p, -1);
3139                 return;
3140         }
3141
3142         dev = p2p->go_neg_peer;
3143
3144         if (result == P2P_SEND_ACTION_NO_ACK) {
3145                 /*
3146                  * Retry GO Negotiation Confirmation
3147                  * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
3148                  * ACK for confirmation.
3149                  */
3150                 if (dev && dev->go_neg_conf &&
3151                     dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
3152                         p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
3153                                 dev->go_neg_conf_sent);
3154                         p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
3155                         if (p2p_send_action(p2p, dev->go_neg_conf_freq,
3156                                             dev->info.p2p_device_addr,
3157                                             p2p->cfg->dev_addr,
3158                                             dev->info.p2p_device_addr,
3159                                             wpabuf_head(dev->go_neg_conf),
3160                                             wpabuf_len(dev->go_neg_conf), 0) >=
3161                             0) {
3162                                 dev->go_neg_conf_sent++;
3163                                 return;
3164                         }
3165                         p2p_dbg(p2p, "Failed to re-send Action frame");
3166
3167                         /*
3168                          * Continue with the assumption that the first attempt
3169                          * went through and just the ACK frame was lost.
3170                          */
3171                 }
3172
3173                 /*
3174                  * It looks like the TX status for GO Negotiation Confirm is
3175                  * often showing failure even when the peer has actually
3176                  * received the frame. Since the peer may change channels
3177                  * immediately after having received the frame, we may not see
3178                  * an Ack for retries, so just dropping a single frame may
3179                  * trigger this. To allow the group formation to succeed if the
3180                  * peer did indeed receive the frame, continue regardless of
3181                  * the TX status.
3182                  */
3183                 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
3184         }
3185
3186         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3187
3188         if (dev == NULL)
3189                 return;
3190
3191         p2p_go_complete(p2p, dev);
3192 }
3193
3194
3195 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3196                         const u8 *src, const u8 *bssid,
3197                         enum p2p_send_action_result result)
3198 {
3199         enum p2p_pending_action_state state;
3200         int success;
3201
3202         p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
3203                 " src=" MACSTR " bssid=" MACSTR " result=%d",
3204                 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
3205                 MAC2STR(bssid), result);
3206         success = result == P2P_SEND_ACTION_SUCCESS;
3207         state = p2p->pending_action_state;
3208         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3209         switch (state) {
3210         case P2P_NO_PENDING_ACTION:
3211                 if (p2p->send_action_in_progress) {
3212                         p2p->send_action_in_progress = 0;
3213                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3214                 }
3215                 if (p2p->after_scan_tx_in_progress) {
3216                         p2p->after_scan_tx_in_progress = 0;
3217                         if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
3218                             p2p_run_after_scan(p2p))
3219                                 break;
3220                         if (p2p->state == P2P_SEARCH) {
3221                                 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
3222                                 p2p_continue_find(p2p);
3223                         }
3224                 }
3225                 break;
3226         case P2P_PENDING_GO_NEG_REQUEST:
3227                 p2p_go_neg_req_cb(p2p, success);
3228                 break;
3229         case P2P_PENDING_GO_NEG_RESPONSE:
3230                 p2p_go_neg_resp_cb(p2p, success);
3231                 break;
3232         case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3233                 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3234                 break;
3235         case P2P_PENDING_GO_NEG_CONFIRM:
3236                 p2p_go_neg_conf_cb(p2p, result);
3237                 break;
3238         case P2P_PENDING_SD:
3239                 p2p_sd_cb(p2p, success);
3240                 break;
3241         case P2P_PENDING_PD:
3242                 p2p_prov_disc_cb(p2p, success);
3243                 break;
3244         case P2P_PENDING_INVITATION_REQUEST:
3245                 p2p_invitation_req_cb(p2p, success);
3246                 break;
3247         case P2P_PENDING_INVITATION_RESPONSE:
3248                 p2p_invitation_resp_cb(p2p, success);
3249                 break;
3250         case P2P_PENDING_DEV_DISC_REQUEST:
3251                 p2p_dev_disc_req_cb(p2p, success);
3252                 break;
3253         case P2P_PENDING_DEV_DISC_RESPONSE:
3254                 p2p_dev_disc_resp_cb(p2p, success);
3255                 break;
3256         case P2P_PENDING_GO_DISC_REQ:
3257                 p2p_go_disc_req_cb(p2p, success);
3258                 break;
3259         }
3260
3261         p2p->after_scan_tx_in_progress = 0;
3262 }
3263
3264
3265 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3266                    unsigned int duration)
3267 {
3268         if (freq == p2p->pending_client_disc_freq) {
3269                 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3270                 p2p->pending_client_disc_freq = 0;
3271                 return;
3272         }
3273
3274         if (freq != p2p->pending_listen_freq) {
3275                 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3276                         freq, duration, p2p->pending_listen_freq);
3277                 return;
3278         }
3279
3280         p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3281                 p2p->pending_listen_sec, p2p->pending_listen_usec,
3282                 p2p->pending_listen_freq);
3283         p2p->in_listen = 1;
3284         p2p->drv_in_listen = freq;
3285         if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3286                 /*
3287                  * Add 20 msec extra wait to avoid race condition with driver
3288                  * remain-on-channel end event, i.e., give driver more time to
3289                  * complete the operation before our timeout expires.
3290                  */
3291                 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3292                                 p2p->pending_listen_usec + 20000);
3293         }
3294
3295         p2p->pending_listen_freq = 0;
3296 }
3297
3298
3299 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3300 {
3301         p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3302         p2p->drv_in_listen = 0;
3303         if (p2p->in_listen)
3304                 return 0; /* Internal timeout will trigger the next step */
3305
3306         if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3307                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3308                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3309                         p2p_go_neg_failed(p2p, -1);
3310                         return 0;
3311                 }
3312
3313                 p2p_set_state(p2p, P2P_CONNECT);
3314                 p2p_connect_send(p2p, p2p->go_neg_peer);
3315                 return 1;
3316         } else if (p2p->state == P2P_SEARCH) {
3317                 if (p2p->p2p_scan_running) {
3318                          /*
3319                           * Search is already in progress. This can happen if
3320                           * an Action frame RX is reported immediately after
3321                           * the end of a remain-on-channel operation and the
3322                           * response frame to that is sent using an offchannel
3323                           * operation while in p2p_find. Avoid an attempt to
3324                           * restart a scan here.
3325                           */
3326                         p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3327                         return 1;
3328                 }
3329                 if (p2p->pending_listen_freq) {
3330                         /*
3331                          * Better wait a bit if the driver is unable to start
3332                          * offchannel operation for some reason. p2p_search()
3333                          * will be started from internal timeout.
3334                          */
3335                         p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3336                         p2p_set_timeout(p2p, 0, 100000);
3337                         return 1;
3338                 }
3339                 if (p2p->search_delay) {
3340                         p2p_dbg(p2p, "Delay search operation by %u ms",
3341                                 p2p->search_delay);
3342                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3343                                         (p2p->search_delay % 1000) * 1000);
3344                         return 1;
3345                 }
3346                 p2p_search(p2p);
3347                 return 1;
3348         }
3349
3350         return 0;
3351 }
3352
3353
3354 static void p2p_timeout_connect(struct p2p_data *p2p)
3355 {
3356         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3357         if (p2p->go_neg_peer &&
3358             (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3359                 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3360                 p2p_go_neg_failed(p2p, -1);
3361                 return;
3362         }
3363         if (p2p->go_neg_peer &&
3364             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3365             p2p->go_neg_peer->connect_reqs < 120) {
3366                 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3367                 p2p_connect_send(p2p, p2p->go_neg_peer);
3368                 return;
3369         }
3370         if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3371                 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3372                 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3373                 p2p_set_timeout(p2p, 0, 30000);
3374                 return;
3375         }
3376         p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3377         p2p_listen_in_find(p2p, 0);
3378 }
3379
3380
3381 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3382 {
3383         if (p2p->go_neg_peer) {
3384                 if (p2p->drv_in_listen) {
3385                         p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3386                         return;
3387                 }
3388
3389                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3390                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3391                         p2p_go_neg_failed(p2p, -1);
3392                         return;
3393                 }
3394
3395                 p2p_set_state(p2p, P2P_CONNECT);
3396                 p2p_connect_send(p2p, p2p->go_neg_peer);
3397         } else
3398                 p2p_set_state(p2p, P2P_IDLE);
3399 }
3400
3401
3402 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3403 {
3404         p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3405
3406         if (p2p->cfg->is_concurrent_session_active &&
3407             p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3408                 p2p_set_timeout(p2p, 0, 500000);
3409         else
3410                 p2p_set_timeout(p2p, 0, 200000);
3411 }
3412
3413
3414 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3415 {
3416         struct p2p_device *dev = p2p->go_neg_peer;
3417
3418         if (dev == NULL) {
3419                 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3420                 return;
3421         }
3422
3423         p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3424         p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3425         p2p_listen_in_find(p2p, 0);
3426 }
3427
3428
3429 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3430 {
3431         p2p_dbg(p2p, "Service Discovery Query timeout");
3432         if (p2p->sd_peer) {
3433                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3434                 p2p->sd_peer = NULL;
3435         }
3436         p2p_continue_find(p2p);
3437 }
3438
3439
3440 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3441 {
3442         p2p_dbg(p2p, "Provision Discovery Request timeout");
3443         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3444         p2p_continue_find(p2p);
3445 }
3446
3447
3448 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3449 {
3450         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3451
3452         /*
3453          * For user initiated PD requests that we have not gotten any responses
3454          * for while in IDLE state, we retry them a couple of times before
3455          * giving up.
3456          */
3457         if (!p2p->user_initiated_pd)
3458                 return;
3459
3460         p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3461
3462         if (p2p->pd_retries) {
3463                 p2p->pd_retries--;
3464                 p2p_retry_pd(p2p);
3465         } else {
3466                 struct p2p_device *dev;
3467                 int for_join = 0;
3468
3469                 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3470                         if (os_memcmp(p2p->pending_pd_devaddr,
3471                                       dev->info.p2p_device_addr, ETH_ALEN) != 0)
3472                                 continue;
3473                         if (dev->req_config_methods &&
3474                             (dev->flags & P2P_DEV_PD_FOR_JOIN))
3475                                 for_join = 1;
3476                 }
3477
3478                 if (p2p->cfg->prov_disc_fail)
3479                         p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3480                                                  p2p->pending_pd_devaddr,
3481                                                  for_join ?
3482                                                  P2P_PROV_DISC_TIMEOUT_JOIN :
3483                                                  P2P_PROV_DISC_TIMEOUT);
3484                 p2p_reset_pending_pd(p2p);
3485         }
3486 }
3487
3488
3489 static void p2p_timeout_invite(struct p2p_data *p2p)
3490 {
3491         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3492         p2p_set_state(p2p, P2P_INVITE_LISTEN);
3493         if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3494                 /*
3495                  * Better remain on operating channel instead of listen channel
3496                  * when running a group.
3497                  */
3498                 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
3499                 p2p_set_timeout(p2p, 0, 100000);
3500                 return;
3501         }
3502         p2p_listen_in_find(p2p, 0);
3503 }
3504
3505
3506 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3507 {
3508         if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3509                 p2p_set_state(p2p, P2P_INVITE);
3510                 p2p_invite_send(p2p, p2p->invite_peer,
3511                                 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
3512         } else {
3513                 if (p2p->invite_peer) {
3514                         p2p_dbg(p2p, "Invitation Request retry limit reached");
3515                         if (p2p->cfg->invitation_result)
3516                                 p2p->cfg->invitation_result(
3517                                         p2p->cfg->cb_ctx, -1, NULL, NULL,
3518                                         p2p->invite_peer->info.p2p_device_addr,
3519                                         0, 0);
3520                 }
3521                 p2p_set_state(p2p, P2P_IDLE);
3522         }
3523 }
3524
3525
3526 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3527 {
3528         struct p2p_data *p2p = eloop_ctx;
3529
3530         p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
3531
3532         p2p->in_listen = 0;
3533         if (p2p->drv_in_listen) {
3534                 p2p_dbg(p2p, "Driver is still in listen state - stop it");
3535                 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
3536         }
3537
3538         switch (p2p->state) {
3539         case P2P_IDLE:
3540                 /* Check if we timed out waiting for PD req */
3541                 if (p2p->pending_action_state == P2P_PENDING_PD)
3542                         p2p_timeout_prov_disc_req(p2p);
3543                 break;
3544         case P2P_SEARCH:
3545                 /* Check if we timed out waiting for PD req */
3546                 if (p2p->pending_action_state == P2P_PENDING_PD)
3547                         p2p_timeout_prov_disc_req(p2p);
3548                 if (p2p->search_delay && !p2p->in_search_delay) {
3549                         p2p_dbg(p2p, "Delay search operation by %u ms",
3550                                 p2p->search_delay);
3551                         p2p->in_search_delay = 1;
3552                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3553                                         (p2p->search_delay % 1000) * 1000);
3554                         break;
3555                 }
3556                 p2p->in_search_delay = 0;
3557                 p2p_search(p2p);
3558                 break;
3559         case P2P_CONNECT:
3560                 p2p_timeout_connect(p2p);
3561                 break;
3562         case P2P_CONNECT_LISTEN:
3563                 p2p_timeout_connect_listen(p2p);
3564                 break;
3565         case P2P_GO_NEG:
3566                 break;
3567         case P2P_LISTEN_ONLY:
3568                 /* Check if we timed out waiting for PD req */
3569                 if (p2p->pending_action_state == P2P_PENDING_PD)
3570                         p2p_timeout_prov_disc_req(p2p);
3571
3572                 if (p2p->ext_listen_only) {
3573                         p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
3574                         p2p->ext_listen_only = 0;
3575                         p2p_set_state(p2p, P2P_IDLE);
3576                 }
3577                 break;
3578         case P2P_WAIT_PEER_CONNECT:
3579                 p2p_timeout_wait_peer_connect(p2p);
3580                 break;
3581         case P2P_WAIT_PEER_IDLE:
3582                 p2p_timeout_wait_peer_idle(p2p);
3583                 break;
3584         case P2P_SD_DURING_FIND:
3585                 p2p_timeout_sd_during_find(p2p);
3586                 break;
3587         case P2P_PROVISIONING:
3588                 break;
3589         case P2P_PD_DURING_FIND:
3590                 p2p_timeout_prov_disc_during_find(p2p);
3591                 break;
3592         case P2P_INVITE:
3593                 p2p_timeout_invite(p2p);
3594                 break;
3595         case P2P_INVITE_LISTEN:
3596                 p2p_timeout_invite_listen(p2p);
3597                 break;
3598         }
3599 }
3600
3601
3602 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
3603 {
3604         struct p2p_device *dev;
3605
3606         dev = p2p_get_device(p2p, peer_addr);
3607         p2p_dbg(p2p, "Local request to reject connection attempts by peer "
3608                 MACSTR, MAC2STR(peer_addr));
3609         if (dev == NULL) {
3610                 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
3611                 return -1;
3612         }
3613         dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
3614         dev->flags |= P2P_DEV_USER_REJECTED;
3615         return 0;
3616 }
3617
3618
3619 const char * p2p_wps_method_text(enum p2p_wps_method method)
3620 {
3621         switch (method) {
3622         case WPS_NOT_READY:
3623                 return "not-ready";
3624         case WPS_PIN_DISPLAY:
3625                 return "Display";
3626         case WPS_PIN_KEYPAD:
3627                 return "Keypad";
3628         case WPS_PBC:
3629                 return "PBC";
3630         case WPS_NFC:
3631                 return "NFC";
3632         }
3633
3634         return "??";
3635 }
3636
3637
3638 static const char * p2p_go_state_text(enum p2p_go_state go_state)
3639 {
3640         switch (go_state) {
3641         case UNKNOWN_GO:
3642                 return "unknown";
3643         case LOCAL_GO:
3644                 return "local";
3645         case  REMOTE_GO:
3646                 return "remote";
3647         }
3648
3649         return "??";
3650 }
3651
3652
3653 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
3654                                                const u8 *addr, int next)
3655 {
3656         struct p2p_device *dev;
3657
3658         if (addr)
3659                 dev = p2p_get_device(p2p, addr);
3660         else
3661                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
3662
3663         if (dev && next) {
3664                 dev = dl_list_first(&dev->list, struct p2p_device, list);
3665                 if (&dev->list == &p2p->devices)
3666                         dev = NULL;
3667         }
3668
3669         if (dev == NULL)
3670                 return NULL;
3671
3672         return &dev->info;
3673 }
3674
3675
3676 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
3677                           char *buf, size_t buflen)
3678 {
3679         struct p2p_device *dev;
3680         int res;
3681         char *pos, *end;
3682         struct os_reltime now;
3683
3684         if (info == NULL)
3685                 return -1;
3686
3687         dev = (struct p2p_device *) (((u8 *) info) -
3688                                      offsetof(struct p2p_device, info));
3689
3690         pos = buf;
3691         end = buf + buflen;
3692
3693         os_get_reltime(&now);
3694         res = os_snprintf(pos, end - pos,
3695                           "age=%d\n"
3696                           "listen_freq=%d\n"
3697                           "wps_method=%s\n"
3698                           "interface_addr=" MACSTR "\n"
3699                           "member_in_go_dev=" MACSTR "\n"
3700                           "member_in_go_iface=" MACSTR "\n"
3701                           "go_neg_req_sent=%d\n"
3702                           "go_state=%s\n"
3703                           "dialog_token=%u\n"
3704                           "intended_addr=" MACSTR "\n"
3705                           "country=%c%c\n"
3706                           "oper_freq=%d\n"
3707                           "req_config_methods=0x%x\n"
3708                           "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
3709                           "status=%d\n"
3710                           "invitation_reqs=%u\n",
3711                           (int) (now.sec - dev->last_seen.sec),
3712                           dev->listen_freq,
3713                           p2p_wps_method_text(dev->wps_method),
3714                           MAC2STR(dev->interface_addr),
3715                           MAC2STR(dev->member_in_go_dev),
3716                           MAC2STR(dev->member_in_go_iface),
3717                           dev->go_neg_req_sent,
3718                           p2p_go_state_text(dev->go_state),
3719                           dev->dialog_token,
3720                           MAC2STR(dev->intended_addr),
3721                           dev->country[0] ? dev->country[0] : '_',
3722                           dev->country[1] ? dev->country[1] : '_',
3723                           dev->oper_freq,
3724                           dev->req_config_methods,
3725                           dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
3726                           "[PROBE_REQ_ONLY]" : "",
3727                           dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
3728                           dev->flags & P2P_DEV_NOT_YET_READY ?
3729                           "[NOT_YET_READY]" : "",
3730                           dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
3731                           "[PD_PEER_DISPLAY]" : "",
3732                           dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
3733                           "[PD_PEER_KEYPAD]" : "",
3734                           dev->flags & P2P_DEV_USER_REJECTED ?
3735                           "[USER_REJECTED]" : "",
3736                           dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
3737                           "[PEER_WAITING_RESPONSE]" : "",
3738                           dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
3739                           "[PREFER_PERSISTENT_GROUP]" : "",
3740                           dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
3741                           "[WAIT_GO_NEG_RESPONSE]" : "",
3742                           dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
3743                           "[WAIT_GO_NEG_CONFIRM]" : "",
3744                           dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
3745                           "[GROUP_CLIENT_ONLY]" : "",
3746                           dev->flags & P2P_DEV_FORCE_FREQ ?
3747                           "[FORCE_FREQ]" : "",
3748                           dev->flags & P2P_DEV_PD_FOR_JOIN ?
3749                           "[PD_FOR_JOIN]" : "",
3750                           dev->status,
3751                           dev->invitation_reqs);
3752         if (os_snprintf_error(end - pos, res))
3753                 return pos - buf;
3754         pos += res;
3755
3756         if (dev->ext_listen_period) {
3757                 res = os_snprintf(pos, end - pos,
3758                                   "ext_listen_period=%u\n"
3759                                   "ext_listen_interval=%u\n",
3760                                   dev->ext_listen_period,
3761                                   dev->ext_listen_interval);
3762                 if (os_snprintf_error(end - pos, res))
3763                         return pos - buf;
3764                 pos += res;
3765         }
3766
3767         if (dev->oper_ssid_len) {
3768                 res = os_snprintf(pos, end - pos,
3769                                   "oper_ssid=%s\n",
3770                                   wpa_ssid_txt(dev->oper_ssid,
3771                                                dev->oper_ssid_len));
3772                 if (os_snprintf_error(end - pos, res))
3773                         return pos - buf;
3774                 pos += res;
3775         }
3776
3777 #ifdef CONFIG_WIFI_DISPLAY
3778         if (dev->info.wfd_subelems) {
3779                 res = os_snprintf(pos, end - pos, "wfd_subelems=");
3780                 if (os_snprintf_error(end - pos, res))
3781                         return pos - buf;
3782                 pos += res;
3783
3784                 pos += wpa_snprintf_hex(pos, end - pos,
3785                                         wpabuf_head(dev->info.wfd_subelems),
3786                                         wpabuf_len(dev->info.wfd_subelems));
3787
3788                 res = os_snprintf(pos, end - pos, "\n");
3789                 if (os_snprintf_error(end - pos, res))
3790                         return pos - buf;
3791                 pos += res;
3792         }
3793 #endif /* CONFIG_WIFI_DISPLAY */
3794
3795         return pos - buf;
3796 }
3797
3798
3799 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
3800 {
3801         return p2p_get_device(p2p, addr) != NULL;
3802 }
3803
3804
3805 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
3806 {
3807         if (enabled) {
3808                 p2p_dbg(p2p, "Client discoverability enabled");
3809                 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3810         } else {
3811                 p2p_dbg(p2p, "Client discoverability disabled");
3812                 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3813         }
3814 }
3815
3816
3817 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
3818                                               u32 duration2, u32 interval2)
3819 {
3820         struct wpabuf *req;
3821         struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
3822         u8 *len;
3823
3824         req = wpabuf_alloc(100);
3825         if (req == NULL)
3826                 return NULL;
3827
3828         if (duration1 || interval1) {
3829                 os_memset(&desc1, 0, sizeof(desc1));
3830                 desc1.count_type = 1;
3831                 desc1.duration = duration1;
3832                 desc1.interval = interval1;
3833                 ptr1 = &desc1;
3834
3835                 if (duration2 || interval2) {
3836                         os_memset(&desc2, 0, sizeof(desc2));
3837                         desc2.count_type = 2;
3838                         desc2.duration = duration2;
3839                         desc2.interval = interval2;
3840                         ptr2 = &desc2;
3841                 }
3842         }
3843
3844         p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
3845         len = p2p_buf_add_ie_hdr(req);
3846         p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
3847         p2p_buf_update_ie_hdr(req, len);
3848
3849         return req;
3850 }
3851
3852
3853 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
3854                      const u8 *own_interface_addr, unsigned int freq,
3855                      u32 duration1, u32 interval1, u32 duration2,
3856                      u32 interval2)
3857 {
3858         struct wpabuf *req;
3859
3860         p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
3861                 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
3862                 "dur2=%u int2=%u",
3863                 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
3864                 freq, duration1, interval1, duration2, interval2);
3865
3866         req = p2p_build_presence_req(duration1, interval1, duration2,
3867                                      interval2);
3868         if (req == NULL)
3869                 return -1;
3870
3871         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3872         if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
3873                             go_interface_addr,
3874                             wpabuf_head(req), wpabuf_len(req), 200) < 0) {
3875                 p2p_dbg(p2p, "Failed to send Action frame");
3876         }
3877         wpabuf_free(req);
3878
3879         return 0;
3880 }
3881
3882
3883 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
3884                                                size_t noa_len, u8 dialog_token)
3885 {
3886         struct wpabuf *resp;
3887         u8 *len;
3888
3889         resp = wpabuf_alloc(100 + noa_len);
3890         if (resp == NULL)
3891                 return NULL;
3892
3893         p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
3894         len = p2p_buf_add_ie_hdr(resp);
3895         p2p_buf_add_status(resp, status);
3896         if (noa) {
3897                 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
3898                 wpabuf_put_le16(resp, noa_len);
3899                 wpabuf_put_data(resp, noa, noa_len);
3900         } else
3901                 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
3902         p2p_buf_update_ie_hdr(resp, len);
3903
3904         return resp;
3905 }
3906
3907
3908 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
3909                                      const u8 *sa, const u8 *data, size_t len,
3910                                      int rx_freq)
3911 {
3912         struct p2p_message msg;
3913         u8 status;
3914         struct wpabuf *resp;
3915         size_t g;
3916         struct p2p_group *group = NULL;
3917         int parsed = 0;
3918         u8 noa[50];
3919         int noa_len;
3920
3921         p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
3922
3923         for (g = 0; g < p2p->num_groups; g++) {
3924                 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
3925                               ETH_ALEN) == 0) {
3926                         group = p2p->groups[g];
3927                         break;
3928                 }
3929         }
3930         if (group == NULL) {
3931                 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
3932                         MACSTR, MAC2STR(da));
3933                 return;
3934         }
3935
3936         if (p2p_parse(data, len, &msg) < 0) {
3937                 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
3938                 status = P2P_SC_FAIL_INVALID_PARAMS;
3939                 goto fail;
3940         }
3941         parsed = 1;
3942
3943         if (msg.noa == NULL) {
3944                 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
3945                 status = P2P_SC_FAIL_INVALID_PARAMS;
3946                 goto fail;
3947         }
3948
3949         status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
3950
3951 fail:
3952         if (p2p->cfg->get_noa)
3953                 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
3954                                             sizeof(noa));
3955         else
3956                 noa_len = -1;
3957         resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
3958                                        noa_len > 0 ? noa_len : 0,
3959                                        msg.dialog_token);
3960         if (parsed)
3961                 p2p_parse_free(&msg);
3962         if (resp == NULL)
3963                 return;
3964
3965         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3966         if (p2p_send_action(p2p, rx_freq, sa, da, da,
3967                             wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
3968                 p2p_dbg(p2p, "Failed to send Action frame");
3969         }
3970         wpabuf_free(resp);
3971 }
3972
3973
3974 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
3975                                       const u8 *sa, const u8 *data, size_t len)
3976 {
3977         struct p2p_message msg;
3978
3979         p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
3980
3981         if (p2p_parse(data, len, &msg) < 0) {
3982                 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
3983                 return;
3984         }
3985
3986         if (msg.status == NULL || msg.noa == NULL) {
3987                 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
3988                 p2p_parse_free(&msg);
3989                 return;
3990         }
3991
3992         if (p2p->cfg->presence_resp) {
3993                 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
3994                                         msg.noa, msg.noa_len);
3995         }
3996
3997         if (*msg.status) {
3998                 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
3999                         *msg.status);
4000                 p2p_parse_free(&msg);
4001                 return;
4002         }
4003
4004         p2p_dbg(p2p, "P2P Presence Request was accepted");
4005         wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
4006                     msg.noa, msg.noa_len);
4007         /* TODO: process NoA */
4008         p2p_parse_free(&msg);
4009 }
4010
4011
4012 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
4013 {
4014         struct p2p_data *p2p = eloop_ctx;
4015
4016         if (p2p->ext_listen_interval) {
4017                 /* Schedule next extended listen timeout */
4018                 eloop_register_timeout(p2p->ext_listen_interval_sec,
4019                                        p2p->ext_listen_interval_usec,
4020                                        p2p_ext_listen_timeout, p2p, NULL);
4021         }
4022
4023         if ((p2p->cfg->is_p2p_in_progress &&
4024              p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
4025             (p2p->pending_action_state == P2P_PENDING_PD &&
4026              p2p->pd_retries > 0)) {
4027                 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
4028                         p2p_state_txt(p2p->state));
4029                 return;
4030         }
4031
4032         if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
4033                 /*
4034                  * This should not really happen, but it looks like the Listen
4035                  * command may fail is something else (e.g., a scan) was
4036                  * running at an inconvenient time. As a workaround, allow new
4037                  * Extended Listen operation to be started.
4038                  */
4039                 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
4040                 p2p->ext_listen_only = 0;
4041                 p2p_set_state(p2p, P2P_IDLE);
4042         }
4043
4044         if (p2p->state != P2P_IDLE) {
4045                 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
4046                 return;
4047         }
4048
4049         p2p_dbg(p2p, "Extended Listen timeout");
4050         p2p->ext_listen_only = 1;
4051         if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
4052                 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
4053                 p2p->ext_listen_only = 0;
4054         }
4055 }
4056
4057
4058 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
4059                    unsigned int interval)
4060 {
4061         if (period > 65535 || interval > 65535 || period > interval ||
4062             (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
4063                 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
4064                         period, interval);
4065                 return -1;
4066         }
4067
4068         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
4069
4070         if (interval == 0) {
4071                 p2p_dbg(p2p, "Disabling Extended Listen Timing");
4072                 p2p->ext_listen_period = 0;
4073                 p2p->ext_listen_interval = 0;
4074                 return 0;
4075         }
4076
4077         p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
4078                 period, interval);
4079         p2p->ext_listen_period = period;
4080         p2p->ext_listen_interval = interval;
4081         p2p->ext_listen_interval_sec = interval / 1000;
4082         p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
4083
4084         eloop_register_timeout(p2p->ext_listen_interval_sec,
4085                                p2p->ext_listen_interval_usec,
4086                                p2p_ext_listen_timeout, p2p, NULL);
4087
4088         return 0;
4089 }
4090
4091
4092 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4093                       const u8 *ie, size_t ie_len)
4094 {
4095         struct p2p_message msg;
4096
4097         if (bssid == NULL || ie == NULL)
4098                 return;
4099
4100         os_memset(&msg, 0, sizeof(msg));
4101         if (p2p_parse_ies(ie, ie_len, &msg))
4102                 return;
4103         if (msg.minor_reason_code == NULL) {
4104                 p2p_parse_free(&msg);
4105                 return;
4106         }
4107
4108         p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
4109                 " reason_code=%u minor_reason_code=%u",
4110                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4111
4112         p2p_parse_free(&msg);
4113 }
4114
4115
4116 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4117                         const u8 *ie, size_t ie_len)
4118 {
4119         struct p2p_message msg;
4120
4121         if (bssid == NULL || ie == NULL)
4122                 return;
4123
4124         os_memset(&msg, 0, sizeof(msg));
4125         if (p2p_parse_ies(ie, ie_len, &msg))
4126                 return;
4127         if (msg.minor_reason_code == NULL) {
4128                 p2p_parse_free(&msg);
4129                 return;
4130         }
4131
4132         p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
4133                 " reason_code=%u minor_reason_code=%u",
4134                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4135
4136         p2p_parse_free(&msg);
4137 }
4138
4139
4140 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
4141 {
4142         if (enabled) {
4143                 p2p_dbg(p2p, "Managed P2P Device operations enabled");
4144                 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
4145         } else {
4146                 p2p_dbg(p2p, "Managed P2P Device operations disabled");
4147                 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
4148         }
4149 }
4150
4151
4152 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class,
4153                                  u8 *op_channel)
4154 {
4155         return p2p_channel_random_social(&p2p->channels, op_class, op_channel);
4156 }
4157
4158
4159 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
4160                            u8 forced)
4161 {
4162         if (p2p_channel_to_freq(reg_class, channel) < 0)
4163                 return -1;
4164
4165         p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
4166                 reg_class, channel);
4167
4168         /*
4169          * Listen channel was set in configuration or set by control interface;
4170          * cannot override it.
4171          */
4172         if (p2p->cfg->channel_forced && forced == 0)
4173                 return -1;
4174
4175         if (p2p->state == P2P_IDLE) {
4176                 p2p->cfg->reg_class = reg_class;
4177                 p2p->cfg->channel = channel;
4178                 p2p->cfg->channel_forced = forced;
4179         } else {
4180                 p2p_dbg(p2p, "Defer setting listen channel");
4181                 p2p->pending_reg_class = reg_class;
4182                 p2p->pending_channel = channel;
4183                 p2p->pending_channel_forced = forced;
4184         }
4185
4186         return 0;
4187 }
4188
4189
4190 u8 p2p_get_listen_channel(struct p2p_data *p2p)
4191 {
4192         return p2p->cfg->channel;
4193 }
4194
4195
4196 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
4197 {
4198         p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
4199         if (postfix == NULL) {
4200                 p2p->cfg->ssid_postfix_len = 0;
4201                 return 0;
4202         }
4203         if (len > sizeof(p2p->cfg->ssid_postfix))
4204                 return -1;
4205         os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
4206         p2p->cfg->ssid_postfix_len = len;
4207         return 0;
4208 }
4209
4210
4211 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
4212                          int cfg_op_channel)
4213 {
4214         if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
4215                 return -1;
4216
4217         p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
4218                 op_reg_class, op_channel);
4219         p2p->cfg->op_reg_class = op_reg_class;
4220         p2p->cfg->op_channel = op_channel;
4221         p2p->cfg->cfg_op_channel = cfg_op_channel;
4222         return 0;
4223 }
4224
4225
4226 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
4227                       const struct p2p_channel *pref_chan)
4228 {
4229         struct p2p_channel *n;
4230
4231         if (pref_chan) {
4232                 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
4233                 if (n == NULL)
4234                         return -1;
4235                 os_memcpy(n, pref_chan,
4236                           num_pref_chan * sizeof(struct p2p_channel));
4237         } else
4238                 n = NULL;
4239
4240         os_free(p2p->cfg->pref_chan);
4241         p2p->cfg->pref_chan = n;
4242         p2p->cfg->num_pref_chan = num_pref_chan;
4243
4244         return 0;
4245 }
4246
4247
4248 int p2p_set_no_go_freq(struct p2p_data *p2p,
4249                        const struct wpa_freq_range_list *list)
4250 {
4251         struct wpa_freq_range *tmp;
4252
4253         if (list == NULL || list->num == 0) {
4254                 os_free(p2p->no_go_freq.range);
4255                 p2p->no_go_freq.range = NULL;
4256                 p2p->no_go_freq.num = 0;
4257                 return 0;
4258         }
4259
4260         tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4261         if (tmp == NULL)
4262                 return -1;
4263         os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4264         os_free(p2p->no_go_freq.range);
4265         p2p->no_go_freq.range = tmp;
4266         p2p->no_go_freq.num = list->num;
4267         p2p_dbg(p2p, "Updated no GO chan list");
4268
4269         return 0;
4270 }
4271
4272
4273 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4274                            u8 *iface_addr)
4275 {
4276         struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4277         if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4278                 return -1;
4279         os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4280         return 0;
4281 }
4282
4283
4284 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4285                            u8 *dev_addr)
4286 {
4287         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4288         if (dev == NULL)
4289                 return -1;
4290         os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4291         return 0;
4292 }
4293
4294
4295 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4296 {
4297         os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4298         if (is_zero_ether_addr(p2p->peer_filter))
4299                 p2p_dbg(p2p, "Disable peer filter");
4300         else
4301                 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4302                         MAC2STR(p2p->peer_filter));
4303 }
4304
4305
4306 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4307 {
4308         p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4309         if (p2p->cross_connect == enabled)
4310                 return;
4311         p2p->cross_connect = enabled;
4312         /* TODO: may need to tear down any action group where we are GO(?) */
4313 }
4314
4315
4316 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4317 {
4318         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4319         if (dev == NULL)
4320                 return -1;
4321         if (dev->oper_freq <= 0)
4322                 return -1;
4323         return dev->oper_freq;
4324 }
4325
4326
4327 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4328 {
4329         p2p_dbg(p2p, "Intra BSS distribution %s",
4330                 enabled ? "enabled" : "disabled");
4331         p2p->cfg->p2p_intra_bss = enabled;
4332 }
4333
4334
4335 void p2p_update_channel_list(struct p2p_data *p2p,
4336                              const struct p2p_channels *chan,
4337                              const struct p2p_channels *cli_chan)
4338 {
4339         p2p_dbg(p2p, "Update channel list");
4340         os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4341         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4342         os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4343                   sizeof(struct p2p_channels));
4344         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4345 }
4346
4347
4348 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4349                     const u8 *src, const u8 *bssid, const u8 *buf,
4350                     size_t len, unsigned int wait_time)
4351 {
4352         if (p2p->p2p_scan_running) {
4353                 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4354                 if (p2p->after_scan_tx) {
4355                         p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4356                         os_free(p2p->after_scan_tx);
4357                 }
4358                 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4359                                                len);
4360                 if (p2p->after_scan_tx == NULL)
4361                         return -1;
4362                 p2p->after_scan_tx->freq = freq;
4363                 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4364                 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4365                 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4366                 p2p->after_scan_tx->len = len;
4367                 p2p->after_scan_tx->wait_time = wait_time;
4368                 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4369                 return 0;
4370         }
4371
4372         return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4373                                      buf, len, wait_time);
4374 }
4375
4376
4377 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4378                            int freq_overall)
4379 {
4380         p2p_dbg(p2p, "Best channel: 2.4 GHz: %d,  5 GHz: %d,  overall: %d",
4381                 freq_24, freq_5, freq_overall);
4382         p2p->best_freq_24 = freq_24;
4383         p2p->best_freq_5 = freq_5;
4384         p2p->best_freq_overall = freq_overall;
4385 }
4386
4387
4388 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4389 {
4390         p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4391         p2p->own_freq_preference = freq;
4392 }
4393
4394
4395 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4396 {
4397         if (p2p == NULL || p2p->go_neg_peer == NULL)
4398                 return NULL;
4399         return p2p->go_neg_peer->info.p2p_device_addr;
4400 }
4401
4402
4403 const struct p2p_peer_info *
4404 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4405 {
4406         struct p2p_device *dev;
4407
4408         if (addr) {
4409                 dev = p2p_get_device(p2p, addr);
4410                 if (!dev)
4411                         return NULL;
4412
4413                 if (!next) {
4414                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4415                                 return NULL;
4416
4417                         return &dev->info;
4418                 } else {
4419                         do {
4420                                 dev = dl_list_first(&dev->list,
4421                                                     struct p2p_device,
4422                                                     list);
4423                                 if (!dev || &dev->list == &p2p->devices)
4424                                         return NULL;
4425                         } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4426                 }
4427         } else {
4428                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4429                 if (!dev)
4430                         return NULL;
4431                 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4432                         dev = dl_list_first(&dev->list,
4433                                             struct p2p_device,
4434                                             list);
4435                         if (!dev || &dev->list == &p2p->devices)
4436                                 return NULL;
4437                 }
4438         }
4439
4440         return &dev->info;
4441 }
4442
4443
4444 int p2p_in_progress(struct p2p_data *p2p)
4445 {
4446         if (p2p == NULL)
4447                 return 0;
4448         if (p2p->state == P2P_SEARCH)
4449                 return 2;
4450         return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4451 }
4452
4453
4454 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4455                             u8 client_timeout)
4456 {
4457         if (p2p) {
4458                 p2p->go_timeout = go_timeout;
4459                 p2p->client_timeout = client_timeout;
4460         }
4461 }
4462
4463
4464 #ifdef CONFIG_WIFI_DISPLAY
4465
4466 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4467 {
4468         size_t g;
4469         struct p2p_group *group;
4470
4471         for (g = 0; g < p2p->num_groups; g++) {
4472                 group = p2p->groups[g];
4473                 p2p_group_force_beacon_update_ies(group);
4474         }
4475 }
4476
4477
4478 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4479 {
4480         wpabuf_free(p2p->wfd_ie_beacon);
4481         p2p->wfd_ie_beacon = ie;
4482         p2p_update_wfd_ie_groups(p2p);
4483         return 0;
4484 }
4485
4486
4487 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4488 {
4489         wpabuf_free(p2p->wfd_ie_probe_req);
4490         p2p->wfd_ie_probe_req = ie;
4491         return 0;
4492 }
4493
4494
4495 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4496 {
4497         wpabuf_free(p2p->wfd_ie_probe_resp);
4498         p2p->wfd_ie_probe_resp = ie;
4499         p2p_update_wfd_ie_groups(p2p);
4500         return 0;
4501 }
4502
4503
4504 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4505 {
4506         wpabuf_free(p2p->wfd_ie_assoc_req);
4507         p2p->wfd_ie_assoc_req = ie;
4508         return 0;
4509 }
4510
4511
4512 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4513 {
4514         wpabuf_free(p2p->wfd_ie_invitation);
4515         p2p->wfd_ie_invitation = ie;
4516         return 0;
4517 }
4518
4519
4520 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4521 {
4522         wpabuf_free(p2p->wfd_ie_prov_disc_req);
4523         p2p->wfd_ie_prov_disc_req = ie;
4524         return 0;
4525 }
4526
4527
4528 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
4529 {
4530         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
4531         p2p->wfd_ie_prov_disc_resp = ie;
4532         return 0;
4533 }
4534
4535
4536 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
4537 {
4538         wpabuf_free(p2p->wfd_ie_go_neg);
4539         p2p->wfd_ie_go_neg = ie;
4540         return 0;
4541 }
4542
4543
4544 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
4545 {
4546         wpabuf_free(p2p->wfd_dev_info);
4547         if (elem) {
4548                 p2p->wfd_dev_info = wpabuf_dup(elem);
4549                 if (p2p->wfd_dev_info == NULL)
4550                         return -1;
4551         } else
4552                 p2p->wfd_dev_info = NULL;
4553
4554         return 0;
4555 }
4556
4557
4558 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
4559 {
4560         wpabuf_free(p2p->wfd_assoc_bssid);
4561         if (elem) {
4562                 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
4563                 if (p2p->wfd_assoc_bssid == NULL)
4564                         return -1;
4565         } else
4566                 p2p->wfd_assoc_bssid = NULL;
4567
4568         return 0;
4569 }
4570
4571
4572 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
4573                                   const struct wpabuf *elem)
4574 {
4575         wpabuf_free(p2p->wfd_coupled_sink_info);
4576         if (elem) {
4577                 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
4578                 if (p2p->wfd_coupled_sink_info == NULL)
4579                         return -1;
4580         } else
4581                 p2p->wfd_coupled_sink_info = NULL;
4582
4583         return 0;
4584 }
4585
4586 #endif /* CONFIG_WIFI_DISPLAY */
4587
4588
4589 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
4590                      int max_disc_tu)
4591 {
4592         if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
4593                 return -1;
4594
4595         p2p->min_disc_int = min_disc_int;
4596         p2p->max_disc_int = max_disc_int;
4597         p2p->max_disc_tu = max_disc_tu;
4598         p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
4599                 min_disc_int, max_disc_int, max_disc_tu);
4600
4601         return 0;
4602 }
4603
4604
4605 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
4606 {
4607         va_list ap;
4608         char buf[500];
4609
4610         if (!p2p->cfg->debug_print)
4611                 return;
4612
4613         va_start(ap, fmt);
4614         vsnprintf(buf, sizeof(buf), fmt, ap);
4615         buf[sizeof(buf) - 1] = '\0';
4616         va_end(ap);
4617         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
4618 }
4619
4620
4621 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
4622 {
4623         va_list ap;
4624         char buf[500];
4625
4626         if (!p2p->cfg->debug_print)
4627                 return;
4628
4629         va_start(ap, fmt);
4630         vsnprintf(buf, sizeof(buf), fmt, ap);
4631         buf[sizeof(buf) - 1] = '\0';
4632         va_end(ap);
4633         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
4634 }
4635
4636
4637 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
4638 {
4639         va_list ap;
4640         char buf[500];
4641
4642         if (!p2p->cfg->debug_print)
4643                 return;
4644
4645         va_start(ap, fmt);
4646         vsnprintf(buf, sizeof(buf), fmt, ap);
4647         buf[sizeof(buf) - 1] = '\0';
4648         va_end(ap);
4649         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
4650 }
4651
4652
4653 void p2p_loop_on_known_peers(struct p2p_data *p2p,
4654                              void (*peer_callback)(struct p2p_peer_info *peer,
4655                                                    void *user_data),
4656                              void *user_data)
4657 {
4658         struct p2p_device *dev, *n;
4659
4660         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
4661                 peer_callback(&dev->info, user_data);
4662         }
4663 }
4664
4665
4666 #ifdef CONFIG_WPS_NFC
4667
4668 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
4669                                               int client_freq,
4670                                               const u8 *go_dev_addr,
4671                                               const u8 *ssid, size_t ssid_len)
4672 {
4673         struct wpabuf *buf;
4674         u8 op_class, channel;
4675         enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
4676
4677         buf = wpabuf_alloc(1000);
4678         if (buf == NULL)
4679                 return NULL;
4680
4681         op_class = p2p->cfg->reg_class;
4682         channel = p2p->cfg->channel;
4683
4684         p2p_buf_add_capability(buf, p2p->dev_capab &
4685                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
4686         p2p_buf_add_device_info(buf, p2p, NULL);
4687
4688         if (p2p->num_groups > 0) {
4689                 int freq = p2p_group_get_freq(p2p->groups[0]);
4690                 role = P2P_GO_IN_A_GROUP;
4691                 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
4692                         p2p_dbg(p2p,
4693                                 "Unknown GO operating frequency %d MHz for NFC handover",
4694                                 freq);
4695                         wpabuf_free(buf);
4696                         return NULL;
4697                 }
4698         } else if (client_freq > 0) {
4699                 role = P2P_CLIENT_IN_A_GROUP;
4700                 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
4701                         p2p_dbg(p2p,
4702                                 "Unknown client operating frequency %d MHz for NFC handover",
4703                                 client_freq);
4704                         wpabuf_free(buf);
4705                         return NULL;
4706                 }
4707         }
4708
4709         p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
4710                                        channel, role);
4711
4712         if (p2p->num_groups > 0) {
4713                 /* Limit number of clients to avoid very long message */
4714                 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
4715                 p2p_group_buf_add_id(p2p->groups[0], buf);
4716         } else if (client_freq > 0 &&
4717                    go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
4718                    ssid && ssid_len > 0) {
4719                 /*
4720                  * Add the optional P2P Group ID to indicate in which group this
4721                  * device is a P2P Client.
4722                  */
4723                 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
4724         }
4725
4726         return buf;
4727 }
4728
4729
4730 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
4731                                            int client_freq,
4732                                            const u8 *go_dev_addr,
4733                                            const u8 *ssid, size_t ssid_len)
4734 {
4735         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
4736                                       ssid_len);
4737 }
4738
4739
4740 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
4741                                            int client_freq,
4742                                            const u8 *go_dev_addr,
4743                                            const u8 *ssid, size_t ssid_len)
4744 {
4745         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
4746                                       ssid_len);
4747 }
4748
4749
4750 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
4751                                         struct p2p_nfc_params *params)
4752 {
4753         struct p2p_message msg;
4754         struct p2p_device *dev;
4755         const u8 *p2p_dev_addr;
4756         int freq;
4757         enum p2p_role_indication role;
4758
4759         params->next_step = NO_ACTION;
4760
4761         if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
4762                                    params->p2p_attr, params->p2p_len, &msg)) {
4763                 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
4764                 p2p_parse_free(&msg);
4765                 return -1;
4766         }
4767
4768         if (msg.p2p_device_addr)
4769                 p2p_dev_addr = msg.p2p_device_addr;
4770         else if (msg.device_id)
4771                 p2p_dev_addr = msg.device_id;
4772         else {
4773                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
4774                 p2p_parse_free(&msg);
4775                 return -1;
4776         }
4777
4778         if (msg.oob_dev_password) {
4779                 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
4780                           msg.oob_dev_password_len);
4781                 params->oob_dev_pw_len = msg.oob_dev_password_len;
4782         }
4783
4784         dev = p2p_create_device(p2p, p2p_dev_addr);
4785         if (dev == NULL) {
4786                 p2p_parse_free(&msg);
4787                 return -1;
4788         }
4789
4790         params->peer = &dev->info;
4791
4792         os_get_reltime(&dev->last_seen);
4793         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
4794         p2p_copy_wps_info(p2p, dev, 0, &msg);
4795
4796         if (!msg.oob_go_neg_channel) {
4797                 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
4798                 return -1;
4799         }
4800
4801         if (msg.oob_go_neg_channel[3] == 0 &&
4802             msg.oob_go_neg_channel[4] == 0)
4803                 freq = 0;
4804         else
4805                 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
4806                                            msg.oob_go_neg_channel[4]);
4807         if (freq < 0) {
4808                 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
4809                 return -1;
4810         }
4811         role = msg.oob_go_neg_channel[5];
4812
4813         if (role == P2P_GO_IN_A_GROUP) {
4814                 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
4815                 params->go_freq = freq;
4816         } else if (role == P2P_CLIENT_IN_A_GROUP) {
4817                 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
4818                         freq);
4819                 params->go_freq = freq;
4820         } else
4821                 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
4822         dev->oob_go_neg_freq = freq;
4823
4824         if (!params->sel && role != P2P_GO_IN_A_GROUP) {
4825                 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
4826                                            p2p->cfg->channel);
4827                 if (freq < 0) {
4828                         p2p_dbg(p2p, "Own listen channel not known");
4829                         return -1;
4830                 }
4831                 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
4832                 dev->oob_go_neg_freq = freq;
4833         }
4834
4835         if (msg.group_id) {
4836                 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
4837                 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
4838                 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
4839                           params->go_ssid_len);
4840         }
4841
4842         if (dev->flags & P2P_DEV_USER_REJECTED) {
4843                 p2p_dbg(p2p, "Do not report rejected device");
4844                 p2p_parse_free(&msg);
4845                 return 0;
4846         }
4847
4848         if (!(dev->flags & P2P_DEV_REPORTED)) {
4849                 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
4850                                     !(dev->flags & P2P_DEV_REPORTED_ONCE));
4851                 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
4852         }
4853         p2p_parse_free(&msg);
4854
4855         if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
4856                 params->next_step = BOTH_GO;
4857         else if (role == P2P_GO_IN_A_GROUP)
4858                 params->next_step = JOIN_GROUP;
4859         else if (role == P2P_CLIENT_IN_A_GROUP) {
4860                 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
4861                 params->next_step = PEER_CLIENT;
4862         } else if (p2p->num_groups > 0)
4863                 params->next_step = AUTH_JOIN;
4864         else if (params->sel)
4865                 params->next_step = INIT_GO_NEG;
4866         else
4867                 params->next_step = RESP_GO_NEG;
4868
4869         return 0;
4870 }
4871
4872
4873 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
4874                                       int go_intent,
4875                                       const u8 *own_interface_addr)
4876 {
4877
4878         p2p->authorized_oob_dev_pw_id = dev_pw_id;
4879         if (dev_pw_id == 0) {
4880                 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
4881                 return;
4882         }
4883
4884         p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
4885                 dev_pw_id);
4886
4887         p2p->go_intent = go_intent;
4888         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
4889 }
4890
4891 #endif /* CONFIG_WPS_NFC */
4892
4893
4894 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
4895 {
4896         if (len < 8 || len > 63)
4897                 return -1;
4898         p2p->cfg->passphrase_len = len;
4899         return 0;
4900 }
4901
4902
4903 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
4904 {
4905         p2p->vendor_elem = vendor_elem;
4906 }
4907
4908
4909 void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx)
4910 {
4911         struct p2p_data *p2p = eloop_ctx;
4912
4913         p2p_dbg(p2p,
4914                 "Timeout on waiting peer to become ready for GO Negotiation");
4915         p2p_go_neg_failed(p2p, -1);
4916 }