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