src/p2p/p2p.c

   1 /*
   2  * Wi-Fi Direct - P2P module
   3  * Copyright (c) 2009-2010, Atheros Communications
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "eloop.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/ieee802_11_common.h"
  15 #include "common/wpa_ctrl.h"
  16 #include "crypto/sha256.h"
  17 #include "crypto/crypto.h"
  18 #include "wps/wps_i.h"
  19 #include "p2p_i.h"
  20 #include "p2p.h"
  21
  22
  23 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
  24 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
  25 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
  26                                      const u8 *sa, const u8 *data, size_t len,
  27                                      int rx_freq);
  28 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
  29                                       const u8 *sa, const u8 *data,
  30                                       size_t len);
  31 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
  32 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx);
  33
  34
  35 /*
  36  * p2p_scan recovery timeout
  37  *
  38  * Many drivers are using 30 second timeout on scan results. Allow a bit larger
  39  * timeout for this to avoid hitting P2P timeout unnecessarily.
  40  */
  41 #define P2P_SCAN_TIMEOUT 35
  42
  43 /**
  44  * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer
  45  * entries will be removed
  46  */
  47 #ifndef P2P_PEER_EXPIRATION_AGE
  48 #define P2P_PEER_EXPIRATION_AGE 60
  49 #endif /* P2P_PEER_EXPIRATION_AGE */
  50
  51
  52 void p2p_expire_peers(struct p2p_data *p2p)
  53 {
  54         struct p2p_device *dev, *n;
  55         struct os_reltime now;
  56         size_t i;
  57
  58         os_get_reltime(&now);
  59         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
  60                 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
  61                         continue;
  62
  63                 if (dev == p2p->go_neg_peer) {
  64                         /*
  65                          * GO Negotiation is in progress with the peer, so
  66                          * don't expire the peer entry until GO Negotiation
  67                          * fails or times out.
  68                          */
  69                         continue;
  70                 }
  71
  72                 if (p2p->cfg->go_connected &&
  73                     p2p->cfg->go_connected(p2p->cfg->cb_ctx,
  74                                            dev->info.p2p_device_addr)) {
  75                         /*
  76                          * We are connected as a client to a group in which the
  77                          * peer is the GO, so do not expire the peer entry.
  78                          */
  79                         os_get_reltime(&dev->last_seen);
  80                         continue;
  81                 }
  82
  83                 for (i = 0; i < p2p->num_groups; i++) {
  84                         if (p2p_group_is_client_connected(
  85                                     p2p->groups[i], dev->info.p2p_device_addr))
  86                                 break;
  87                 }
  88                 if (i < p2p->num_groups) {
  89                         /*
  90                          * The peer is connected as a client in a group where
  91                          * we are the GO, so do not expire the peer entry.
  92                          */
  93                         os_get_reltime(&dev->last_seen);
  94                         continue;
  95                 }
  96
  97                 p2p_dbg(p2p, "Expiring old peer entry " MACSTR,
  98                         MAC2STR(dev->info.p2p_device_addr));
  99                 dl_list_del(&dev->list);
 100                 p2p_device_free(p2p, dev);
 101         }
 102 }
 103
 104
 105 static const char * p2p_state_txt(int state)
 106 {
 107         switch (state) {
 108         case P2P_IDLE:
 109                 return "IDLE";
 110         case P2P_SEARCH:
 111                 return "SEARCH";
 112         case P2P_CONNECT:
 113                 return "CONNECT";
 114         case P2P_CONNECT_LISTEN:
 115                 return "CONNECT_LISTEN";
 116         case P2P_GO_NEG:
 117                 return "GO_NEG";
 118         case P2P_LISTEN_ONLY:
 119                 return "LISTEN_ONLY";
 120         case P2P_WAIT_PEER_CONNECT:
 121                 return "WAIT_PEER_CONNECT";
 122         case P2P_WAIT_PEER_IDLE:
 123                 return "WAIT_PEER_IDLE";
 124         case P2P_SD_DURING_FIND:
 125                 return "SD_DURING_FIND";
 126         case P2P_PROVISIONING:
 127                 return "PROVISIONING";
 128         case P2P_PD_DURING_FIND:
 129                 return "PD_DURING_FIND";
 130         case P2P_INVITE:
 131                 return "INVITE";
 132         case P2P_INVITE_LISTEN:
 133                 return "INVITE_LISTEN";
 134         default:
 135                 return "?";
 136         }
 137 }
 138
 139
 140 const char * p2p_get_state_txt(struct p2p_data *p2p)
 141 {
 142         return p2p_state_txt(p2p->state);
 143 }
 144
 145
 146 struct p2ps_advertisement * p2p_get_p2ps_adv_list(struct p2p_data *p2p)
 147 {
 148         return p2p ? p2p->p2ps_adv_list : NULL;
 149 }
 150
 151
 152 void p2p_set_intended_addr(struct p2p_data *p2p, const u8 *intended_addr)
 153 {
 154         if (p2p && intended_addr)
 155                 os_memcpy(p2p->intended_addr, intended_addr, ETH_ALEN);
 156 }
 157
 158
 159 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 160 {
 161         struct p2p_device *dev = NULL;
 162
 163         if (!addr || !p2p)
 164                 return 0;
 165
 166         dev = p2p_get_device(p2p, addr);
 167         if (dev)
 168                 return dev->wps_prov_info;
 169         else
 170                 return 0;
 171 }
 172
 173
 174 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 175 {
 176         struct p2p_device *dev = NULL;
 177
 178         if (!addr || !p2p)
 179                 return;
 180
 181         dev = p2p_get_device(p2p, addr);
 182         if (dev)
 183                 dev->wps_prov_info = 0;
 184 }
 185
 186
 187 void p2p_set_state(struct p2p_data *p2p, int new_state)
 188 {
 189         p2p_dbg(p2p, "State %s -> %s",
 190                 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
 191         p2p->state = new_state;
 192
 193         if (new_state == P2P_IDLE && p2p->pending_channel) {
 194                 p2p_dbg(p2p, "Apply change in listen channel");
 195                 p2p->cfg->reg_class = p2p->pending_reg_class;
 196                 p2p->cfg->channel = p2p->pending_channel;
 197                 p2p->pending_reg_class = 0;
 198                 p2p->pending_channel = 0;
 199         }
 200 }
 201
 202
 203 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
 204 {
 205         p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
 206                 p2p_state_txt(p2p->state), sec, usec);
 207         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 208         eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
 209 }
 210
 211
 212 void p2p_clear_timeout(struct p2p_data *p2p)
 213 {
 214         p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
 215         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 216 }
 217
 218
 219 void p2p_go_neg_failed(struct p2p_data *p2p, int status)
 220 {
 221         struct p2p_go_neg_results res;
 222         struct p2p_device *peer = p2p->go_neg_peer;
 223
 224         if (!peer)
 225                 return;
 226
 227         eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
 228         if (p2p->state != P2P_SEARCH) {
 229                 /*
 230                  * Clear timeouts related to GO Negotiation if no new p2p_find
 231                  * has been started.
 232                  */
 233                 p2p_clear_timeout(p2p);
 234                 p2p_set_state(p2p, P2P_IDLE);
 235         }
 236
 237         peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
 238         peer->wps_method = WPS_NOT_READY;
 239         peer->oob_pw_id = 0;
 240         wpabuf_free(peer->go_neg_conf);
 241         peer->go_neg_conf = NULL;
 242         p2p->go_neg_peer = NULL;
 243
 244         os_memset(&res, 0, sizeof(res));
 245         res.status = status;
 246         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
 247         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
 248         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
 249 }
 250
 251
 252 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
 253 {
 254         unsigned int r, tu;
 255         int freq;
 256         struct wpabuf *ies;
 257
 258         p2p_dbg(p2p, "Starting short listen state (state=%s)",
 259                 p2p_state_txt(p2p->state));
 260
 261         if (p2p->pending_listen_freq) {
 262                 /* We have a pending p2p_listen request */
 263                 p2p_dbg(p2p, "p2p_listen command pending already");
 264                 return;
 265         }
 266
 267         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 268         if (freq < 0) {
 269                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 270                 return;
 271         }
 272
 273         if (os_get_random((u8 *) &r, sizeof(r)) < 0)
 274                 r = 0;
 275         tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
 276               p2p->min_disc_int) * 100;
 277         if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
 278                 tu = p2p->max_disc_tu;
 279         if (!dev_disc && tu < 100)
 280                 tu = 100; /* Need to wait in non-device discovery use cases */
 281         if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
 282                 tu = p2p->cfg->max_listen * 1000 / 1024;
 283
 284         if (tu == 0) {
 285                 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
 286                 p2p_set_timeout(p2p, 0, 0);
 287                 return;
 288         }
 289
 290         ies = p2p_build_probe_resp_ies(p2p, NULL, 0);
 291         if (ies == NULL)
 292                 return;
 293
 294         p2p->pending_listen_freq = freq;
 295         p2p->pending_listen_sec = 0;
 296         p2p->pending_listen_usec = 1024 * tu;
 297
 298         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
 299                     ies) < 0) {
 300                 p2p_dbg(p2p, "Failed to start listen mode");
 301                 p2p->pending_listen_freq = 0;
 302         }
 303         wpabuf_free(ies);
 304 }
 305
 306
 307 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
 308 {
 309         int freq;
 310         struct wpabuf *ies;
 311
 312         p2p_dbg(p2p, "Going to listen(only) state");
 313
 314         if (p2p->pending_listen_freq) {
 315                 /* We have a pending p2p_listen request */
 316                 p2p_dbg(p2p, "p2p_listen command pending already");
 317                 return -1;
 318         }
 319
 320         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 321         if (freq < 0) {
 322                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 323                 return -1;
 324         }
 325
 326         p2p->pending_listen_sec = timeout / 1000;
 327         p2p->pending_listen_usec = (timeout % 1000) * 1000;
 328
 329         if (p2p->p2p_scan_running) {
 330                 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
 331                         p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
 332                         return 0;
 333                 }
 334                 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
 335                 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
 336                 return 0;
 337         }
 338
 339         ies = p2p_build_probe_resp_ies(p2p, NULL, 0);
 340         if (ies == NULL)
 341                 return -1;
 342
 343         p2p->pending_listen_freq = freq;
 344
 345         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
 346                 p2p_dbg(p2p, "Failed to start listen mode");
 347                 p2p->pending_listen_freq = 0;
 348                 wpabuf_free(ies);
 349                 return -1;
 350         }
 351         wpabuf_free(ies);
 352
 353         p2p_set_state(p2p, P2P_LISTEN_ONLY);
 354
 355         return 0;
 356 }
 357
 358
 359 static void p2p_device_clear_reported(struct p2p_data *p2p)
 360 {
 361         struct p2p_device *dev;
 362         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 363                 dev->flags &= ~P2P_DEV_REPORTED;
 364                 dev->sd_reqs = 0;
 365         }
 366 }
 367
 368
 369 /**
 370  * p2p_get_device - Fetch a peer entry
 371  * @p2p: P2P module context from p2p_init()
 372  * @addr: P2P Device Address of the peer
 373  * Returns: Pointer to the device entry or %NULL if not found
 374  */
 375 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
 376 {
 377         struct p2p_device *dev;
 378         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 379                 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
 380                         return dev;
 381         }
 382         return NULL;
 383 }
 384
 385
 386 /**
 387  * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
 388  * @p2p: P2P module context from p2p_init()
 389  * @addr: P2P Interface Address of the peer
 390  * Returns: Pointer to the device entry or %NULL if not found
 391  */
 392 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
 393                                              const u8 *addr)
 394 {
 395         struct p2p_device *dev;
 396         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 397                 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
 398                         return dev;
 399         }
 400         return NULL;
 401 }
 402
 403
 404 /**
 405  * p2p_create_device - Create a peer entry
 406  * @p2p: P2P module context from p2p_init()
 407  * @addr: P2P Device Address of the peer
 408  * Returns: Pointer to the device entry or %NULL on failure
 409  *
 410  * If there is already an entry for the peer, it will be returned instead of
 411  * creating a new one.
 412  */
 413 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
 414                                              const u8 *addr)
 415 {
 416         struct p2p_device *dev, *oldest = NULL;
 417         size_t count = 0;
 418
 419         dev = p2p_get_device(p2p, addr);
 420         if (dev)
 421                 return dev;
 422
 423         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 424                 count++;
 425                 if (oldest == NULL ||
 426                     os_reltime_before(&dev->last_seen, &oldest->last_seen))
 427                         oldest = dev;
 428         }
 429         if (count + 1 > p2p->cfg->max_peers && oldest) {
 430                 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
 431                 dl_list_del(&oldest->list);
 432                 p2p_device_free(p2p, oldest);
 433         }
 434
 435         dev = os_zalloc(sizeof(*dev));
 436         if (dev == NULL)
 437                 return NULL;
 438         dl_list_add(&p2p->devices, &dev->list);
 439         os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
 440
 441         return dev;
 442 }
 443
 444
 445 static void p2p_copy_client_info(struct p2p_device *dev,
 446                                  struct p2p_client_info *cli)
 447 {
 448         p2p_copy_filter_devname(dev->info.device_name,
 449                                 sizeof(dev->info.device_name),
 450                                 cli->dev_name, cli->dev_name_len);
 451         dev->info.dev_capab = cli->dev_capab;
 452         dev->info.config_methods = cli->config_methods;
 453         os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
 454         dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
 455         os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
 456                   dev->info.wps_sec_dev_type_list_len);
 457 }
 458
 459
 460 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
 461                                  const u8 *go_interface_addr, int freq,
 462                                  const u8 *gi, size_t gi_len,
 463                                  struct os_reltime *rx_time)
 464 {
 465         struct p2p_group_info info;
 466         size_t c;
 467         struct p2p_device *dev;
 468
 469         if (gi == NULL)
 470                 return 0;
 471
 472         if (p2p_group_info_parse(gi, gi_len, &info) < 0)
 473                 return -1;
 474
 475         /*
 476          * Clear old data for this group; if the devices are still in the
 477          * group, the information will be restored in the loop following this.
 478          */
 479         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 480                 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
 481                               ETH_ALEN) == 0) {
 482                         os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
 483                         os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
 484                 }
 485         }
 486
 487         for (c = 0; c < info.num_clients; c++) {
 488                 struct p2p_client_info *cli = &info.client[c];
 489                 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
 490                               ETH_ALEN) == 0)
 491                         continue; /* ignore our own entry */
 492                 dev = p2p_get_device(p2p, cli->p2p_device_addr);
 493                 if (dev) {
 494                         if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
 495                                           P2P_DEV_PROBE_REQ_ONLY)) {
 496                                 /*
 497                                  * Update information since we have not
 498                                  * received this directly from the client.
 499                                  */
 500                                 p2p_copy_client_info(dev, cli);
 501                         } else {
 502                                 /*
 503                                  * Need to update P2P Client Discoverability
 504                                  * flag since it is valid only in P2P Group
 505                                  * Info attribute.
 506                                  */
 507                                 dev->info.dev_capab &=
 508                                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 509                                 dev->info.dev_capab |=
 510                                         cli->dev_capab &
 511                                         P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 512                         }
 513                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
 514                                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
 515                         }
 516                 } else {
 517                         dev = p2p_create_device(p2p, cli->p2p_device_addr);
 518                         if (dev == NULL)
 519                                 continue;
 520                         dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
 521                         p2p_copy_client_info(dev, cli);
 522                         dev->oper_freq = freq;
 523                         p2p->cfg->dev_found(p2p->cfg->cb_ctx,
 524                                             dev->info.p2p_device_addr,
 525                                             &dev->info, 1);
 526                         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 527                 }
 528
 529                 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
 530                           ETH_ALEN);
 531                 os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
 532                 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
 533                 os_memcpy(dev->member_in_go_iface, go_interface_addr,
 534                           ETH_ALEN);
 535                 dev->flags |= P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT;
 536         }
 537
 538         return 0;
 539 }
 540
 541
 542 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
 543                               int probe_req, const struct p2p_message *msg)
 544 {
 545         os_memcpy(dev->info.device_name, msg->device_name,
 546                   sizeof(dev->info.device_name));
 547
 548         if (msg->manufacturer &&
 549             msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
 550                 os_memset(dev->info.manufacturer, 0,
 551                           sizeof(dev->info.manufacturer));
 552                 os_memcpy(dev->info.manufacturer, msg->manufacturer,
 553                           msg->manufacturer_len);
 554         }
 555
 556         if (msg->model_name &&
 557             msg->model_name_len < sizeof(dev->info.model_name)) {
 558                 os_memset(dev->info.model_name, 0,
 559                           sizeof(dev->info.model_name));
 560                 os_memcpy(dev->info.model_name, msg->model_name,
 561                           msg->model_name_len);
 562         }
 563
 564         if (msg->model_number &&
 565             msg->model_number_len < sizeof(dev->info.model_number)) {
 566                 os_memset(dev->info.model_number, 0,
 567                           sizeof(dev->info.model_number));
 568                 os_memcpy(dev->info.model_number, msg->model_number,
 569                           msg->model_number_len);
 570         }
 571
 572         if (msg->serial_number &&
 573             msg->serial_number_len < sizeof(dev->info.serial_number)) {
 574                 os_memset(dev->info.serial_number, 0,
 575                           sizeof(dev->info.serial_number));
 576                 os_memcpy(dev->info.serial_number, msg->serial_number,
 577                           msg->serial_number_len);
 578         }
 579
 580         if (msg->pri_dev_type)
 581                 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
 582                           sizeof(dev->info.pri_dev_type));
 583         else if (msg->wps_pri_dev_type)
 584                 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
 585                           sizeof(dev->info.pri_dev_type));
 586
 587         if (msg->wps_sec_dev_type_list) {
 588                 os_memcpy(dev->info.wps_sec_dev_type_list,
 589                           msg->wps_sec_dev_type_list,
 590                           msg->wps_sec_dev_type_list_len);
 591                 dev->info.wps_sec_dev_type_list_len =
 592                         msg->wps_sec_dev_type_list_len;
 593         }
 594
 595         if (msg->capability) {
 596                 /*
 597                  * P2P Client Discoverability bit is reserved in all frames
 598                  * that use this function, so do not change its value here.
 599                  */
 600                 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 601                 dev->info.dev_capab |= msg->capability[0] &
 602                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 603                 dev->info.group_capab = msg->capability[1];
 604         }
 605
 606         if (msg->ext_listen_timing) {
 607                 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
 608                 dev->ext_listen_interval =
 609                         WPA_GET_LE16(msg->ext_listen_timing + 2);
 610         }
 611
 612         if (!probe_req) {
 613                 u16 new_config_methods;
 614                 new_config_methods = msg->config_methods ?
 615                         msg->config_methods : msg->wps_config_methods;
 616                 if (new_config_methods &&
 617                     dev->info.config_methods != new_config_methods) {
 618                         p2p_dbg(p2p, "Update peer " MACSTR
 619                                 " config_methods 0x%x -> 0x%x",
 620                                 MAC2STR(dev->info.p2p_device_addr),
 621                                 dev->info.config_methods,
 622                                 new_config_methods);
 623                         dev->info.config_methods = new_config_methods;
 624                 }
 625         }
 626 }
 627
 628
 629 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies,
 630                                          size_t ies_len)
 631 {
 632         const u8 *pos, *end;
 633         u8 id, len;
 634
 635         wpabuf_free(dev->info.vendor_elems);
 636         dev->info.vendor_elems = NULL;
 637
 638         end = ies + ies_len;
 639
 640         for (pos = ies; end - pos > 1; pos += len) {
 641                 id = *pos++;
 642                 len = *pos++;
 643
 644                 if (len > end - pos)
 645                         break;
 646
 647                 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3)
 648                         continue;
 649
 650                 if (len >= 4) {
 651                         u32 type = WPA_GET_BE32(pos);
 652
 653                         if (type == WPA_IE_VENDOR_TYPE ||
 654                             type == WMM_IE_VENDOR_TYPE ||
 655                             type == WPS_IE_VENDOR_TYPE ||
 656                             type == P2P_IE_VENDOR_TYPE ||
 657                             type == WFD_IE_VENDOR_TYPE)
 658                                 continue;
 659                 }
 660
 661                 /* Unknown vendor element - make raw IE data available */
 662                 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0)
 663                         break;
 664                 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len);
 665         }
 666 }
 667
 668
 669 static int p2p_compare_wfd_info(struct p2p_device *dev,
 670                               const struct p2p_message *msg)
 671 {
 672         if (dev->info.wfd_subelems && msg->wfd_subelems) {
 673                 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used)
 674                         return 1;
 675
 676                 return os_memcmp(dev->info.wfd_subelems->buf,
 677                                  msg->wfd_subelems->buf,
 678                                  dev->info.wfd_subelems->used);
 679         }
 680         if (dev->info.wfd_subelems || msg->wfd_subelems)
 681                 return 1;
 682
 683         return 0;
 684 }
 685
 686
 687 /**
 688  * p2p_add_device - Add peer entries based on scan results or P2P frames
 689  * @p2p: P2P module context from p2p_init()
 690  * @addr: Source address of Beacon or Probe Response frame (may be either
 691  *      P2P Device Address or P2P Interface Address)
 692  * @level: Signal level (signal strength of the received frame from the peer)
 693  * @freq: Frequency on which the Beacon or Probe Response frame was received
 694  * @rx_time: Time when the result was received
 695  * @ies: IEs from the Beacon or Probe Response frame
 696  * @ies_len: Length of ies buffer in octets
 697  * @scan_res: Whether this was based on scan results
 698  * Returns: 0 on success, -1 on failure
 699  *
 700  * If the scan result is for a GO, the clients in the group will also be added
 701  * to the peer table. This function can also be used with some other frames
 702  * like Provision Discovery Request that contains P2P Capability and P2P Device
 703  * Info attributes.
 704  */
 705 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
 706                    struct os_reltime *rx_time, int level, const u8 *ies,
 707                    size_t ies_len, int scan_res)
 708 {
 709         struct p2p_device *dev;
 710         struct p2p_message msg;
 711         const u8 *p2p_dev_addr;
 712         int wfd_changed;
 713         int i;
 714         struct os_reltime time_now;
 715
 716         os_memset(&msg, 0, sizeof(msg));
 717         if (p2p_parse_ies(ies, ies_len, &msg)) {
 718                 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
 719                 p2p_parse_free(&msg);
 720                 return -1;
 721         }
 722
 723         if (msg.p2p_device_addr)
 724                 p2p_dev_addr = msg.p2p_device_addr;
 725         else if (msg.device_id)
 726                 p2p_dev_addr = msg.device_id;
 727         else {
 728                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
 729                 p2p_parse_free(&msg);
 730                 return -1;
 731         }
 732
 733         if (!is_zero_ether_addr(p2p->peer_filter) &&
 734             os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
 735                 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
 736                         " due to peer filter", MAC2STR(p2p_dev_addr));
 737                 p2p_parse_free(&msg);
 738                 return 0;
 739         }
 740
 741         dev = p2p_create_device(p2p, p2p_dev_addr);
 742         if (dev == NULL) {
 743                 p2p_parse_free(&msg);
 744                 return -1;
 745         }
 746
 747         if (rx_time == NULL) {
 748                 os_get_reltime(&time_now);
 749                 rx_time = &time_now;
 750         }
 751
 752         /*
 753          * Update the device entry only if the new peer
 754          * entry is newer than the one previously stored, or if
 755          * the device was previously seen as a P2P Client in a group
 756          * and the new entry isn't older than a threshold.
 757          */
 758         if (dev->last_seen.sec > 0 &&
 759             os_reltime_before(rx_time, &dev->last_seen) &&
 760             (!(dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT) ||
 761              os_reltime_expired(&dev->last_seen, rx_time,
 762                                 P2P_DEV_GROUP_CLIENT_RESP_THRESHOLD))) {
 763                 p2p_dbg(p2p,
 764                         "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u flags=0x%x)",
 765                         (unsigned int) rx_time->sec,
 766                         (unsigned int) rx_time->usec,
 767                         (unsigned int) dev->last_seen.sec,
 768                         (unsigned int) dev->last_seen.usec,
 769                         dev->flags);
 770                 p2p_parse_free(&msg);
 771                 return -1;
 772         }
 773
 774         os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
 775
 776         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY |
 777                         P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT);
 778
 779         if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
 780                 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
 781         if (msg.ssid &&
 782             msg.ssid[1] <= sizeof(dev->oper_ssid) &&
 783             (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
 784              os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
 785              != 0)) {
 786                 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
 787                 dev->oper_ssid_len = msg.ssid[1];
 788         }
 789
 790         if (msg.adv_service_instance && msg.adv_service_instance_len) {
 791                 wpabuf_free(dev->info.p2ps_instance);
 792                 dev->info.p2ps_instance = wpabuf_alloc_copy(
 793                         msg.adv_service_instance, msg.adv_service_instance_len);
 794         }
 795
 796         if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
 797             *msg.ds_params >= 1 && *msg.ds_params <= 14) {
 798                 int ds_freq;
 799                 if (*msg.ds_params == 14)
 800                         ds_freq = 2484;
 801                 else
 802                         ds_freq = 2407 + *msg.ds_params * 5;
 803                 if (freq != ds_freq) {
 804                         p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
 805                                 freq, ds_freq);
 806                         freq = ds_freq;
 807                 }
 808         }
 809
 810         if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
 811                 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
 812                         MACSTR " %d -> %d MHz (DS param %d)",
 813                         MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
 814                         freq, msg.ds_params ? *msg.ds_params : -1);
 815         }
 816         if (scan_res) {
 817                 dev->listen_freq = freq;
 818                 if (msg.group_info)
 819                         dev->oper_freq = freq;
 820         }
 821         dev->info.level = level;
 822
 823         p2p_copy_wps_info(p2p, dev, 0, &msg);
 824
 825         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 826                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 827                 dev->info.wps_vendor_ext[i] = NULL;
 828         }
 829
 830         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 831                 if (msg.wps_vendor_ext[i] == NULL)
 832                         break;
 833                 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
 834                         msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
 835                 if (dev->info.wps_vendor_ext[i] == NULL)
 836                         break;
 837         }
 838
 839         wfd_changed = p2p_compare_wfd_info(dev, &msg);
 840
 841         if (msg.wfd_subelems) {
 842                 wpabuf_free(dev->info.wfd_subelems);
 843                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
 844         }
 845
 846         if (scan_res) {
 847                 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
 848                                       msg.group_info, msg.group_info_len,
 849                                       rx_time);
 850         }
 851
 852         p2p_parse_free(&msg);
 853
 854         p2p_update_peer_vendor_elems(dev, ies, ies_len);
 855
 856         if (dev->flags & P2P_DEV_REPORTED && !wfd_changed &&
 857             (!msg.adv_service_instance ||
 858              (dev->flags & P2P_DEV_P2PS_REPORTED)))
 859                 return 0;
 860
 861         p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
 862                 freq, (unsigned int) rx_time->sec,
 863                 (unsigned int) rx_time->usec);
 864         if (dev->flags & P2P_DEV_USER_REJECTED) {
 865                 p2p_dbg(p2p, "Do not report rejected device");
 866                 return 0;
 867         }
 868
 869         if (dev->info.config_methods == 0 &&
 870             (freq == 2412 || freq == 2437 || freq == 2462)) {
 871                 /*
 872                  * If we have only seen a Beacon frame from a GO, we do not yet
 873                  * know what WPS config methods it supports. Since some
 874                  * applications use config_methods value from P2P-DEVICE-FOUND
 875                  * events, postpone reporting this peer until we've fully
 876                  * discovered its capabilities.
 877                  *
 878                  * At least for now, do this only if the peer was detected on
 879                  * one of the social channels since that peer can be easily be
 880                  * found again and there are no limitations of having to use
 881                  * passive scan on this channels, so this can be done through
 882                  * Probe Response frame that includes the config_methods
 883                  * information.
 884                  */
 885                 p2p_dbg(p2p, "Do not report peer " MACSTR
 886                         " with unknown config methods", MAC2STR(addr));
 887                 return 0;
 888         }
 889
 890         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
 891                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
 892         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 893
 894         if (msg.adv_service_instance)
 895                 dev->flags |= P2P_DEV_P2PS_REPORTED;
 896
 897         return 0;
 898 }
 899
 900
 901 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
 902 {
 903         int i;
 904
 905         if (p2p->go_neg_peer == dev) {
 906                 /*
 907                  * If GO Negotiation is in progress, report that it has failed.
 908                  */
 909                 p2p_go_neg_failed(p2p, -1);
 910         }
 911         if (p2p->invite_peer == dev)
 912                 p2p->invite_peer = NULL;
 913         if (p2p->sd_peer == dev)
 914                 p2p->sd_peer = NULL;
 915         if (p2p->pending_client_disc_go == dev)
 916                 p2p->pending_client_disc_go = NULL;
 917
 918         /* dev_lost() device, but only if it was previously dev_found() */
 919         if (dev->flags & P2P_DEV_REPORTED_ONCE)
 920                 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
 921                                    dev->info.p2p_device_addr);
 922
 923         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 924                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 925                 dev->info.wps_vendor_ext[i] = NULL;
 926         }
 927
 928         wpabuf_free(dev->info.wfd_subelems);
 929         wpabuf_free(dev->info.vendor_elems);
 930         wpabuf_free(dev->go_neg_conf);
 931         wpabuf_free(dev->info.p2ps_instance);
 932
 933         os_free(dev);
 934 }
 935
 936
 937 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
 938 {
 939         struct p2p_channels *c;
 940         struct p2p_reg_class *cla;
 941         size_t cl, ch;
 942         int found = 0;
 943         u8 reg_class;
 944         u8 channel;
 945         int freq;
 946
 947         c = &p2p->cfg->channels;
 948         for (cl = 0; cl < c->reg_classes; cl++) {
 949                 cla = &c->reg_class[cl];
 950                 if (cla->reg_class != p2p->last_prog_scan_class)
 951                         continue;
 952                 for (ch = 0; ch < cla->channels; ch++) {
 953                         if (cla->channel[ch] == p2p->last_prog_scan_chan) {
 954                                 found = 1;
 955                                 break;
 956                         }
 957                 }
 958                 if (found)
 959                         break;
 960         }
 961
 962         if (!found) {
 963                 /* Start from beginning */
 964                 reg_class = c->reg_class[0].reg_class;
 965                 channel = c->reg_class[0].channel[0];
 966         } else {
 967                 /* Pick the next channel */
 968                 ch++;
 969                 if (ch == cla->channels) {
 970                         cl++;
 971                         if (cl == c->reg_classes)
 972                                 cl = 0;
 973                         ch = 0;
 974                 }
 975                 reg_class = c->reg_class[cl].reg_class;
 976                 channel = c->reg_class[cl].channel[ch];
 977         }
 978
 979         freq = p2p_channel_to_freq(reg_class, channel);
 980         p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
 981                 reg_class, channel, freq);
 982         p2p->last_prog_scan_class = reg_class;
 983         p2p->last_prog_scan_chan = channel;
 984
 985         if (freq == 2412 || freq == 2437 || freq == 2462)
 986                 return 0; /* No need to add social channels */
 987         return freq;
 988 }
 989
 990
 991 static void p2p_search(struct p2p_data *p2p)
 992 {
 993         int freq = 0;
 994         enum p2p_scan_type type;
 995         u16 pw_id = DEV_PW_DEFAULT;
 996         int res;
 997
 998         if (p2p->drv_in_listen) {
 999                 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
1000                 return;
1001         }
1002         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1003
1004         if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
1005             (freq = p2p_get_next_prog_freq(p2p)) > 0) {
1006                 type = P2P_SCAN_SOCIAL_PLUS_ONE;
1007                 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
1008         } else {
1009                 type = P2P_SCAN_SOCIAL;
1010                 p2p_dbg(p2p, "Starting search");
1011         }
1012
1013         res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
1014                                  p2p->num_req_dev_types, p2p->req_dev_types,
1015                                  p2p->find_dev_id, pw_id);
1016         if (res < 0) {
1017                 p2p_dbg(p2p, "Scan request schedule failed");
1018                 p2p_continue_find(p2p);
1019         }
1020 }
1021
1022
1023 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
1024 {
1025         struct p2p_data *p2p = eloop_ctx;
1026         p2p_dbg(p2p, "Find timeout -> stop");
1027         p2p_stop_find(p2p);
1028 }
1029
1030
1031 void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status)
1032 {
1033         if (status != 0) {
1034                 p2p_dbg(p2p, "Scan request failed");
1035                 /* Do continue find even for the first p2p_find_scan */
1036                 p2p_continue_find(p2p);
1037         } else {
1038                 p2p_dbg(p2p, "Running p2p_scan");
1039                 p2p->p2p_scan_running = 1;
1040                 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1041                 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1042                                        p2p, NULL);
1043         }
1044 }
1045
1046
1047 static int p2p_run_after_scan(struct p2p_data *p2p)
1048 {
1049         struct p2p_device *dev;
1050         enum p2p_after_scan op;
1051
1052         if (p2p->after_scan_tx) {
1053                 p2p->after_scan_tx_in_progress = 1;
1054                 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
1055                 p2p->cfg->send_action(p2p->cfg->cb_ctx,
1056                                       p2p->after_scan_tx->freq,
1057                                       p2p->after_scan_tx->dst,
1058                                       p2p->after_scan_tx->src,
1059                                       p2p->after_scan_tx->bssid,
1060                                       (u8 *) (p2p->after_scan_tx + 1),
1061                                       p2p->after_scan_tx->len,
1062                                       p2p->after_scan_tx->wait_time);
1063                 os_free(p2p->after_scan_tx);
1064                 p2p->after_scan_tx = NULL;
1065                 return 1;
1066         }
1067
1068         op = p2p->start_after_scan;
1069         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1070         switch (op) {
1071         case P2P_AFTER_SCAN_NOTHING:
1072                 break;
1073         case P2P_AFTER_SCAN_LISTEN:
1074                 p2p_dbg(p2p, "Start previously requested Listen state");
1075                 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
1076                            p2p->pending_listen_usec / 1000);
1077                 return 1;
1078         case P2P_AFTER_SCAN_CONNECT:
1079                 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
1080                         MAC2STR(p2p->after_scan_peer));
1081                 dev = p2p_get_device(p2p, p2p->after_scan_peer);
1082                 if (dev == NULL) {
1083                         p2p_dbg(p2p, "Peer not known anymore");
1084                         break;
1085                 }
1086                 p2p_connect_send(p2p, dev);
1087                 return 1;
1088         }
1089
1090         return 0;
1091 }
1092
1093
1094 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1095 {
1096         struct p2p_data *p2p = eloop_ctx;
1097         int running;
1098         p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
1099         running = p2p->p2p_scan_running;
1100         /* Make sure we recover from missed scan results callback */
1101         p2p->p2p_scan_running = 0;
1102
1103         if (running)
1104                 p2p_run_after_scan(p2p);
1105 }
1106
1107
1108 static void p2p_free_req_dev_types(struct p2p_data *p2p)
1109 {
1110         p2p->num_req_dev_types = 0;
1111         os_free(p2p->req_dev_types);
1112         p2p->req_dev_types = NULL;
1113 }
1114
1115
1116 static int p2ps_gen_hash(struct p2p_data *p2p, const char *str, u8 *hash)
1117 {
1118         u8 buf[SHA256_MAC_LEN];
1119         char str_buf[256];
1120         const u8 *adv_array;
1121         size_t i, adv_len;
1122
1123         if (!str || !hash)
1124                 return 0;
1125
1126         if (!str[0]) {
1127                 os_memcpy(hash, p2p->wild_card_hash, P2PS_HASH_LEN);
1128                 return 1;
1129         }
1130
1131         adv_array = (u8 *) str_buf;
1132         adv_len = os_strlen(str);
1133         if (adv_len >= sizeof(str_buf))
1134                 return 0;
1135
1136         for (i = 0; i < adv_len; i++) {
1137                 if (str[i] >= 'A' && str[i] <= 'Z')
1138                         str_buf[i] = str[i] - 'A' + 'a';
1139                 else
1140                         str_buf[i] = str[i];
1141         }
1142
1143         if (sha256_vector(1, &adv_array, &adv_len, buf))
1144                 return 0;
1145
1146         os_memcpy(hash, buf, P2PS_HASH_LEN);
1147         return 1;
1148 }
1149
1150
1151 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
1152              enum p2p_discovery_type type,
1153              unsigned int num_req_dev_types, const u8 *req_dev_types,
1154              const u8 *dev_id, unsigned int search_delay,
1155              u8 seek_count, const char **seek, int freq)
1156 {
1157         int res;
1158
1159         p2p_dbg(p2p, "Starting find (type=%d)", type);
1160         os_get_reltime(&p2p->find_start);
1161         if (p2p->p2p_scan_running) {
1162                 p2p_dbg(p2p, "p2p_scan is already running");
1163         }
1164
1165         p2p_free_req_dev_types(p2p);
1166         if (req_dev_types && num_req_dev_types) {
1167                 p2p->req_dev_types = os_malloc(num_req_dev_types *
1168                                                WPS_DEV_TYPE_LEN);
1169                 if (p2p->req_dev_types == NULL)
1170                         return -1;
1171                 os_memcpy(p2p->req_dev_types, req_dev_types,
1172                           num_req_dev_types * WPS_DEV_TYPE_LEN);
1173                 p2p->num_req_dev_types = num_req_dev_types;
1174         }
1175
1176         if (dev_id) {
1177                 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1178                 p2p->find_dev_id = p2p->find_dev_id_buf;
1179         } else
1180                 p2p->find_dev_id = NULL;
1181
1182         if (seek_count == 0 || !seek) {
1183                 /* Not an ASP search */
1184                 p2p->p2ps_seek = 0;
1185         } else if (seek_count == 1 && seek && (!seek[0] || !seek[0][0])) {
1186                 /*
1187                  * An empty seek string means no hash values, but still an ASP
1188                  * search.
1189                  */
1190                 p2p_dbg(p2p, "ASP search");
1191                 p2p->p2ps_seek_count = 0;
1192                 p2p->p2ps_seek = 1;
1193         } else if (seek && seek_count <= P2P_MAX_QUERY_HASH) {
1194                 u8 buf[P2PS_HASH_LEN];
1195                 int i, count = 0;
1196
1197                 for (i = 0; i < seek_count; i++) {
1198                         if (!p2ps_gen_hash(p2p, seek[i], buf))
1199                                 continue;
1200
1201                         p2p_dbg(p2p, "Seek service %s hash " MACSTR,
1202                                 seek[i], MAC2STR(buf));
1203                         os_memcpy(&p2p->p2ps_seek_hash[count * P2PS_HASH_LEN],
1204                                   buf, P2PS_HASH_LEN);
1205                         count++;
1206                 }
1207
1208                 p2p->p2ps_seek_count = count;
1209                 p2p->p2ps_seek = 1;
1210         } else {
1211                 p2p->p2ps_seek_count = 0;
1212                 p2p->p2ps_seek = 1;
1213         }
1214
1215         /* Special case to perform wildcard search */
1216         if (p2p->p2ps_seek_count == 0 && p2p->p2ps_seek) {
1217                 p2p->p2ps_seek_count = 1;
1218                 os_memcpy(&p2p->p2ps_seek_hash, p2p->wild_card_hash,
1219                           P2PS_HASH_LEN);
1220         }
1221
1222         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1223         p2p_clear_timeout(p2p);
1224         if (p2p->pending_listen_freq) {
1225                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_find");
1226                 p2p->pending_listen_freq = 0;
1227         }
1228         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1229         p2p->find_type = type;
1230         p2p_device_clear_reported(p2p);
1231         os_memset(p2p->sd_query_no_ack, 0, ETH_ALEN);
1232         p2p_set_state(p2p, P2P_SEARCH);
1233         p2p->search_delay = search_delay;
1234         p2p->in_search_delay = 0;
1235         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1236         p2p->last_p2p_find_timeout = timeout;
1237         if (timeout)
1238                 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1239                                        p2p, NULL);
1240         switch (type) {
1241         case P2P_FIND_START_WITH_FULL:
1242                 if (freq > 0) {
1243                         /*
1244                          * Start with the specified channel and then move to
1245                          * social channels only scans.
1246                          */
1247                         res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx,
1248                                                  P2P_SCAN_SPECIFIC, freq,
1249                                                  p2p->num_req_dev_types,
1250                                                  p2p->req_dev_types, dev_id,
1251                                                  DEV_PW_DEFAULT);
1252                         break;
1253                 }
1254                 /* fall through */
1255         case P2P_FIND_PROGRESSIVE:
1256                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1257                                          p2p->num_req_dev_types,
1258                                          p2p->req_dev_types, dev_id,
1259                                          DEV_PW_DEFAULT);
1260                 break;
1261         case P2P_FIND_ONLY_SOCIAL:
1262                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1263                                          p2p->num_req_dev_types,
1264                                          p2p->req_dev_types, dev_id,
1265                                          DEV_PW_DEFAULT);
1266                 break;
1267         default:
1268                 return -1;
1269         }
1270
1271         if (res != 0 && p2p->p2p_scan_running) {
1272                 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
1273                 /* wait for the previous p2p_scan to complete */
1274                 res = 0; /* do not report failure */
1275         } else if (res != 0) {
1276                 p2p_dbg(p2p, "Failed to start p2p_scan");
1277                 p2p_set_state(p2p, P2P_IDLE);
1278                 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1279         }
1280
1281         return res;
1282 }
1283
1284
1285 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1286 {
1287         p2p_dbg(p2p, "Stopping find");
1288         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1289         p2p_clear_timeout(p2p);
1290         if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND)
1291                 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1292
1293         p2p->p2ps_seek_count = 0;
1294
1295         p2p_set_state(p2p, P2P_IDLE);
1296         p2p_free_req_dev_types(p2p);
1297         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1298         if (p2p->go_neg_peer)
1299                 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1300         p2p->go_neg_peer = NULL;
1301         p2p->sd_peer = NULL;
1302         p2p->invite_peer = NULL;
1303         p2p_stop_listen_for_freq(p2p, freq);
1304         p2p->send_action_in_progress = 0;
1305 }
1306
1307
1308 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1309 {
1310         if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1311                 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1312                 return;
1313         }
1314         if (p2p->in_listen) {
1315                 p2p->in_listen = 0;
1316                 p2p_clear_timeout(p2p);
1317         }
1318         if (p2p->drv_in_listen) {
1319                 /*
1320                  * The driver may not deliver callback to p2p_listen_end()
1321                  * when the operation gets canceled, so clear the internal
1322                  * variable that is tracking driver state.
1323                  */
1324                 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1325                 p2p->drv_in_listen = 0;
1326         }
1327         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1328 }
1329
1330
1331 void p2p_stop_listen(struct p2p_data *p2p)
1332 {
1333         if (p2p->state != P2P_LISTEN_ONLY) {
1334                 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1335                 return;
1336         }
1337
1338         p2p_stop_listen_for_freq(p2p, 0);
1339         p2p_set_state(p2p, P2P_IDLE);
1340 }
1341
1342
1343 void p2p_stop_find(struct p2p_data *p2p)
1344 {
1345         p2p->pending_listen_freq = 0;
1346         p2p_stop_find_for_freq(p2p, 0);
1347 }
1348
1349
1350 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1351                                     unsigned int force_freq,
1352                                     unsigned int pref_freq, int go)
1353 {
1354         u8 op_class, op_channel;
1355         unsigned int freq = force_freq ? force_freq : pref_freq;
1356
1357         p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
1358                 force_freq, pref_freq, go);
1359         if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1360                 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1361                 return -1;
1362         }
1363
1364         if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
1365             (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
1366                                           op_channel))) {
1367                 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1368                         freq, op_class, op_channel);
1369                 return -1;
1370         }
1371
1372         p2p->op_reg_class = op_class;
1373         p2p->op_channel = op_channel;
1374
1375         if (force_freq) {
1376                 p2p->channels.reg_classes = 1;
1377                 p2p->channels.reg_class[0].channels = 1;
1378                 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1379                 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1380         } else {
1381                 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1382                           sizeof(struct p2p_channels));
1383         }
1384
1385         return 0;
1386 }
1387
1388
1389 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1390 {
1391         u8 op_class, op_channel;
1392         const int op_classes_5ghz[] = { 124, 125, 115, 0 };
1393         const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
1394         const int op_classes_vht[] = { 128, 0 };
1395
1396         p2p_dbg(p2p, "Prepare channel best");
1397
1398         if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1399             p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1400             p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1401             == 0) {
1402                 p2p_dbg(p2p, "Select best overall channel as operating channel preference");
1403                 p2p->op_reg_class = op_class;
1404                 p2p->op_channel = op_channel;
1405         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1406                    p2p_supported_freq(p2p, p2p->best_freq_5) &&
1407                    p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1408                    == 0) {
1409                 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1410                 p2p->op_reg_class = op_class;
1411                 p2p->op_channel = op_channel;
1412         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1413                    p2p_supported_freq(p2p, p2p->best_freq_24) &&
1414                    p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1415                                        &op_channel) == 0) {
1416                 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1417                 p2p->op_reg_class = op_class;
1418                 p2p->op_channel = op_channel;
1419         } else if (p2p->cfg->num_pref_chan > 0 &&
1420                    p2p_channels_includes(&p2p->cfg->channels,
1421                                          p2p->cfg->pref_chan[0].op_class,
1422                                          p2p->cfg->pref_chan[0].chan)) {
1423                 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1424                 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1425                 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1426         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
1427                                       &p2p->op_reg_class, &p2p->op_channel) ==
1428                    0) {
1429                 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
1430                         p2p->op_reg_class, p2p->op_channel);
1431         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
1432                                       &p2p->op_reg_class, &p2p->op_channel) ==
1433                    0) {
1434                 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
1435                         p2p->op_reg_class, p2p->op_channel);
1436         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
1437                                       &p2p->op_reg_class, &p2p->op_channel) ==
1438                    0) {
1439                 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
1440                         p2p->op_reg_class, p2p->op_channel);
1441         } else if (p2p_channels_includes(&p2p->cfg->channels,
1442                                          p2p->cfg->op_reg_class,
1443                                          p2p->cfg->op_channel)) {
1444                 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1445                 p2p->op_reg_class = p2p->cfg->op_reg_class;
1446                 p2p->op_channel = p2p->cfg->op_channel;
1447         } else if (p2p_channel_random_social(&p2p->cfg->channels,
1448                                              &p2p->op_reg_class,
1449                                              &p2p->op_channel) == 0) {
1450                 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference",
1451                         p2p->op_reg_class, p2p->op_channel);
1452         } else {
1453                 /* Select any random available channel from the first available
1454                  * operating class */
1455                 p2p_channel_select(&p2p->cfg->channels, NULL,
1456                                    &p2p->op_reg_class,
1457                                    &p2p->op_channel);
1458                 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
1459                         p2p->op_channel, p2p->op_reg_class);
1460         }
1461
1462         os_memcpy(&p2p->channels, &p2p->cfg->channels,
1463                   sizeof(struct p2p_channels));
1464 }
1465
1466
1467 /**
1468  * p2p_prepare_channel - Select operating channel for GO Negotiation or P2PS PD
1469  * @p2p: P2P module context from p2p_init()
1470  * @dev: Selected peer device
1471  * @force_freq: Forced frequency in MHz or 0 if not forced
1472  * @pref_freq: Preferred frequency in MHz or 0 if no preference
1473  * @go: Whether the local end will be forced to be GO
1474  * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1475  *
1476  * This function is used to do initial operating channel selection for GO
1477  * Negotiation prior to having received peer information or for P2PS PD
1478  * signalling. The selected channel may be further optimized in
1479  * p2p_reselect_channel() once the peer information is available.
1480  */
1481 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1482                         unsigned int force_freq, unsigned int pref_freq, int go)
1483 {
1484         p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1485                 force_freq, pref_freq, go);
1486         if (force_freq || pref_freq) {
1487                 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1488                     0)
1489                         return -1;
1490         } else {
1491                 p2p_prepare_channel_best(p2p);
1492         }
1493         p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1494         if (go)
1495                 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1496         else if (!force_freq)
1497                 p2p_channels_union_inplace(&p2p->channels,
1498                                            &p2p->cfg->cli_channels);
1499         p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1500
1501         p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1502                 p2p->op_reg_class, p2p->op_channel,
1503                 force_freq ? " (forced)" : "");
1504
1505         if (force_freq)
1506                 dev->flags |= P2P_DEV_FORCE_FREQ;
1507         else
1508                 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1509
1510         return 0;
1511 }
1512
1513
1514 static void p2p_set_dev_persistent(struct p2p_device *dev,
1515                                    int persistent_group)
1516 {
1517         switch (persistent_group) {
1518         case 0:
1519                 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1520                                 P2P_DEV_PREFER_PERSISTENT_RECONN);
1521                 break;
1522         case 1:
1523                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1524                 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1525                 break;
1526         case 2:
1527                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1528                         P2P_DEV_PREFER_PERSISTENT_RECONN;
1529                 break;
1530         }
1531 }
1532
1533
1534 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1535                 enum p2p_wps_method wps_method,
1536                 int go_intent, const u8 *own_interface_addr,
1537                 unsigned int force_freq, int persistent_group,
1538                 const u8 *force_ssid, size_t force_ssid_len,
1539                 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1540 {
1541         struct p2p_device *dev;
1542
1543         p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1544                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1545                 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1546                 "oob_pw_id=%u",
1547                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1548                 wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
1549
1550         dev = p2p_get_device(p2p, peer_addr);
1551         if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1552                 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1553                         MAC2STR(peer_addr));
1554                 return -1;
1555         }
1556
1557         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1558                                 go_intent == 15) < 0)
1559                 return -1;
1560
1561         if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1562                 if (!(dev->info.dev_capab &
1563                       P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1564                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1565                                 " that is in a group and is not discoverable",
1566                                 MAC2STR(peer_addr));
1567                         return -1;
1568                 }
1569                 if (dev->oper_freq <= 0) {
1570                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1571                                 " with incomplete information",
1572                                 MAC2STR(peer_addr));
1573                         return -1;
1574                 }
1575
1576                 /*
1577                  * First, try to connect directly. If the peer does not
1578                  * acknowledge frames, assume it is sleeping and use device
1579                  * discoverability via the GO at that point.
1580                  */
1581         }
1582
1583         p2p->ssid_set = 0;
1584         if (force_ssid) {
1585                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1586                                   force_ssid, force_ssid_len);
1587                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1588                 p2p->ssid_len = force_ssid_len;
1589                 p2p->ssid_set = 1;
1590         }
1591
1592         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1593         dev->flags &= ~P2P_DEV_USER_REJECTED;
1594         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1595         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1596         if (pd_before_go_neg)
1597                 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1598         else {
1599                 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1600                 /*
1601                  * Assign dialog token and tie breaker here to use the same
1602                  * values in each retry within the same GO Negotiation exchange.
1603                  */
1604                 dev->dialog_token++;
1605                 if (dev->dialog_token == 0)
1606                         dev->dialog_token = 1;
1607                 dev->tie_breaker = p2p->next_tie_breaker;
1608                 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1609         }
1610         dev->connect_reqs = 0;
1611         dev->go_neg_req_sent = 0;
1612         dev->go_state = UNKNOWN_GO;
1613         p2p_set_dev_persistent(dev, persistent_group);
1614         p2p->go_intent = go_intent;
1615         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1616
1617         if (p2p->state != P2P_IDLE)
1618                 p2p_stop_find(p2p);
1619
1620         if (p2p->after_scan_tx) {
1621                 /*
1622                  * We need to drop the pending frame to avoid issues with the
1623                  * new GO Negotiation, e.g., when the pending frame was from a
1624                  * previous attempt at starting a GO Negotiation.
1625                  */
1626                 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1627                 os_free(p2p->after_scan_tx);
1628                 p2p->after_scan_tx = NULL;
1629         }
1630
1631         dev->wps_method = wps_method;
1632         dev->oob_pw_id = oob_pw_id;
1633         dev->status = P2P_SC_SUCCESS;
1634
1635         if (p2p->p2p_scan_running) {
1636                 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1637                 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1638                 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1639                 return 0;
1640         }
1641         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1642
1643         return p2p_connect_send(p2p, dev);
1644 }
1645
1646
1647 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1648                   enum p2p_wps_method wps_method,
1649                   int go_intent, const u8 *own_interface_addr,
1650                   unsigned int force_freq, int persistent_group,
1651                   const u8 *force_ssid, size_t force_ssid_len,
1652                   unsigned int pref_freq, u16 oob_pw_id)
1653 {
1654         struct p2p_device *dev;
1655
1656         p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1657                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1658                 " wps_method=%d  persistent_group=%d oob_pw_id=%u",
1659                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1660                 wps_method, persistent_group, oob_pw_id);
1661
1662         dev = p2p_get_device(p2p, peer_addr);
1663         if (dev == NULL) {
1664                 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1665                         MAC2STR(peer_addr));
1666                 return -1;
1667         }
1668
1669         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1670                                 15) < 0)
1671                 return -1;
1672
1673         p2p->ssid_set = 0;
1674         if (force_ssid) {
1675                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1676                                   force_ssid, force_ssid_len);
1677                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1678                 p2p->ssid_len = force_ssid_len;
1679                 p2p->ssid_set = 1;
1680         }
1681
1682         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1683         dev->flags &= ~P2P_DEV_USER_REJECTED;
1684         dev->go_neg_req_sent = 0;
1685         dev->go_state = UNKNOWN_GO;
1686         p2p_set_dev_persistent(dev, persistent_group);
1687         p2p->go_intent = go_intent;
1688         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1689
1690         dev->wps_method = wps_method;
1691         dev->oob_pw_id = oob_pw_id;
1692         dev->status = P2P_SC_SUCCESS;
1693
1694         return 0;
1695 }
1696
1697
1698 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1699                       struct p2p_device *dev, struct p2p_message *msg)
1700 {
1701         os_get_reltime(&dev->last_seen);
1702
1703         p2p_copy_wps_info(p2p, dev, 0, msg);
1704
1705         if (msg->listen_channel) {
1706                 int freq;
1707                 freq = p2p_channel_to_freq(msg->listen_channel[3],
1708                                            msg->listen_channel[4]);
1709                 if (freq < 0) {
1710                         p2p_dbg(p2p, "Unknown peer Listen channel: "
1711                                 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1712                                 msg->listen_channel[0],
1713                                 msg->listen_channel[1],
1714                                 msg->listen_channel[2],
1715                                 msg->listen_channel[3],
1716                                 msg->listen_channel[4]);
1717                 } else {
1718                         p2p_dbg(p2p, "Update peer " MACSTR
1719                                 " Listen channel: %u -> %u MHz",
1720                                 MAC2STR(dev->info.p2p_device_addr),
1721                                 dev->listen_freq, freq);
1722                         dev->listen_freq = freq;
1723                 }
1724         }
1725
1726         if (msg->wfd_subelems) {
1727                 wpabuf_free(dev->info.wfd_subelems);
1728                 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1729         }
1730
1731         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1732                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1733                 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1734         } else {
1735                 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1736                         MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1737                         "listen_freq=%d",
1738                         MAC2STR(dev->info.p2p_device_addr),
1739                         dev->info.dev_capab, dev->info.group_capab,
1740                         dev->info.device_name, dev->listen_freq);
1741         }
1742
1743         dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1744
1745         if (dev->flags & P2P_DEV_USER_REJECTED) {
1746                 p2p_dbg(p2p, "Do not report rejected device");
1747                 return;
1748         }
1749
1750         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1751                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
1752         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1753 }
1754
1755
1756 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1757 {
1758         os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1759         p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1760         os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1761                   p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1762         *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1763 }
1764
1765
1766 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1767 {
1768         if (p2p->ssid_set) {
1769                 os_memcpy(params->ssid, p2p->ssid, p2p->ssid_len);
1770                 params->ssid_len = p2p->ssid_len;
1771         } else {
1772                 p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
1773         }
1774         p2p->ssid_set = 0;
1775
1776         p2p_random(params->passphrase, p2p->cfg->passphrase_len);
1777         return 0;
1778 }
1779
1780
1781 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1782 {
1783         struct p2p_go_neg_results res;
1784         int go = peer->go_state == LOCAL_GO;
1785         struct p2p_channels intersection;
1786
1787         p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1788                 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1789
1790         os_memset(&res, 0, sizeof(res));
1791         res.role_go = go;
1792         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1793         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1794         res.wps_method = peer->wps_method;
1795         if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1796                 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1797                         res.persistent_group = 2;
1798                 else
1799                         res.persistent_group = 1;
1800         }
1801
1802         if (go) {
1803                 /* Setup AP mode for WPS provisioning */
1804                 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1805                                                p2p->op_channel);
1806                 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1807                 res.ssid_len = p2p->ssid_len;
1808                 p2p_random(res.passphrase, p2p->cfg->passphrase_len);
1809         } else {
1810                 res.freq = peer->oper_freq;
1811                 if (p2p->ssid_len) {
1812                         os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1813                         res.ssid_len = p2p->ssid_len;
1814                 }
1815         }
1816
1817         p2p_channels_dump(p2p, "own channels", &p2p->channels);
1818         p2p_channels_dump(p2p, "peer channels", &peer->channels);
1819         p2p_channels_intersect(&p2p->channels, &peer->channels,
1820                                &intersection);
1821         if (go) {
1822                 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1823                 p2p_channels_dump(p2p, "intersection after no-GO removal",
1824                                   &intersection);
1825         }
1826
1827         p2p_channels_to_freqs(&intersection, res.freq_list,
1828                               P2P_MAX_CHANNELS);
1829
1830         res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1831
1832         p2p_clear_timeout(p2p);
1833         p2p->ssid_set = 0;
1834         peer->go_neg_req_sent = 0;
1835         peer->wps_method = WPS_NOT_READY;
1836         peer->oob_pw_id = 0;
1837         wpabuf_free(peer->go_neg_conf);
1838         peer->go_neg_conf = NULL;
1839
1840         p2p_set_state(p2p, P2P_PROVISIONING);
1841         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1842 }
1843
1844
1845 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1846                               const u8 *data, size_t len, int rx_freq)
1847 {
1848         p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1849         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1850
1851         if (len < 1)
1852                 return;
1853
1854         switch (data[0]) {
1855         case P2P_GO_NEG_REQ:
1856                 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1857                 break;
1858         case P2P_GO_NEG_RESP:
1859                 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1860                 break;
1861         case P2P_GO_NEG_CONF:
1862                 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1863                 break;
1864         case P2P_INVITATION_REQ:
1865                 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1866                                            rx_freq);
1867                 break;
1868         case P2P_INVITATION_RESP:
1869                 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1870                 break;
1871         case P2P_PROV_DISC_REQ:
1872                 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1873                 break;
1874         case P2P_PROV_DISC_RESP:
1875                 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1876                 break;
1877         case P2P_DEV_DISC_REQ:
1878                 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1879                 break;
1880         case P2P_DEV_DISC_RESP:
1881                 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1882                 break;
1883         default:
1884                 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1885                         data[0]);
1886                 break;
1887         }
1888 }
1889
1890
1891 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1892                                  const u8 *sa, const u8 *bssid, const u8 *data,
1893                                  size_t len, int freq)
1894 {
1895         if (len < 1)
1896                 return;
1897
1898         switch (data[0]) {
1899         case WLAN_PA_VENDOR_SPECIFIC:
1900                 data++;
1901                 len--;
1902                 if (len < 4)
1903                         return;
1904                 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1905                         return;
1906
1907                 data += 4;
1908                 len -= 4;
1909
1910                 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1911                 break;
1912         case WLAN_PA_GAS_INITIAL_REQ:
1913                 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1914                 break;
1915         case WLAN_PA_GAS_INITIAL_RESP:
1916                 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1917                 break;
1918         case WLAN_PA_GAS_COMEBACK_REQ:
1919                 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1920                 break;
1921         case WLAN_PA_GAS_COMEBACK_RESP:
1922                 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1923                 break;
1924         }
1925 }
1926
1927
1928 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1929                    const u8 *bssid, u8 category,
1930                    const u8 *data, size_t len, int freq)
1931 {
1932         if (category == WLAN_ACTION_PUBLIC) {
1933                 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1934                 return;
1935         }
1936
1937         if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1938                 return;
1939
1940         if (len < 4)
1941                 return;
1942
1943         if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1944                 return;
1945         data += 4;
1946         len -= 4;
1947
1948         /* P2P action frame */
1949         p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1950         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1951
1952         if (len < 1)
1953                 return;
1954         switch (data[0]) {
1955         case P2P_NOA:
1956                 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1957                 /* TODO */
1958                 break;
1959         case P2P_PRESENCE_REQ:
1960                 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1961                 break;
1962         case P2P_PRESENCE_RESP:
1963                 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1964                 break;
1965         case P2P_GO_DISC_REQ:
1966                 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1967                 break;
1968         default:
1969                 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1970                 break;
1971         }
1972 }
1973
1974
1975 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1976 {
1977         struct p2p_data *p2p = eloop_ctx;
1978         if (p2p->go_neg_peer == NULL)
1979                 return;
1980         if (p2p->pending_listen_freq) {
1981                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start");
1982                 p2p->pending_listen_freq = 0;
1983         }
1984         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1985         p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1986         /*
1987          * Set new timeout to make sure a previously set one does not expire
1988          * too quickly while waiting for the GO Negotiation to complete.
1989          */
1990         p2p_set_timeout(p2p, 0, 500000);
1991         p2p_connect_send(p2p, p2p->go_neg_peer);
1992 }
1993
1994
1995 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1996 {
1997         struct p2p_data *p2p = eloop_ctx;
1998         if (p2p->invite_peer == NULL)
1999                 return;
2000         if (p2p->pending_listen_freq) {
2001                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start");
2002                 p2p->pending_listen_freq = 0;
2003         }
2004         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
2005         p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
2006                         p2p->invite_dev_pw_id);
2007 }
2008
2009
2010 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
2011                                        const u8 *ie, size_t ie_len)
2012 {
2013         struct p2p_message msg;
2014         struct p2p_device *dev;
2015
2016         os_memset(&msg, 0, sizeof(msg));
2017         if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
2018         {
2019                 p2p_parse_free(&msg);
2020                 return; /* not a P2P probe */
2021         }
2022
2023         if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
2024             os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
2025             != 0) {
2026                 /* The Probe Request is not part of P2P Device Discovery. It is
2027                  * not known whether the source address of the frame is the P2P
2028                  * Device Address or P2P Interface Address. Do not add a new
2029                  * peer entry based on this frames.
2030                  */
2031                 p2p_parse_free(&msg);
2032                 return;
2033         }
2034
2035         dev = p2p_get_device(p2p, addr);
2036         if (dev) {
2037                 if (dev->country[0] == 0 && msg.listen_channel)
2038                         os_memcpy(dev->country, msg.listen_channel, 3);
2039                 os_get_reltime(&dev->last_seen);
2040                 p2p_parse_free(&msg);
2041                 return; /* already known */
2042         }
2043
2044         dev = p2p_create_device(p2p, addr);
2045         if (dev == NULL) {
2046                 p2p_parse_free(&msg);
2047                 return;
2048         }
2049
2050         os_get_reltime(&dev->last_seen);
2051         dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
2052
2053         if (msg.listen_channel) {
2054                 os_memcpy(dev->country, msg.listen_channel, 3);
2055                 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
2056                                                        msg.listen_channel[4]);
2057         }
2058
2059         p2p_copy_wps_info(p2p, dev, 1, &msg);
2060
2061         if (msg.wfd_subelems) {
2062                 wpabuf_free(dev->info.wfd_subelems);
2063                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
2064         }
2065
2066         p2p_parse_free(&msg);
2067
2068         p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
2069                 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
2070                 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
2071                 dev->info.group_capab, dev->info.device_name,
2072                 dev->listen_freq);
2073 }
2074
2075
2076 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
2077                                                 const u8 *addr,
2078                                                 struct p2p_message *msg)
2079 {
2080         struct p2p_device *dev;
2081
2082         dev = p2p_get_device(p2p, addr);
2083         if (dev) {
2084                 os_get_reltime(&dev->last_seen);
2085                 return dev; /* already known */
2086         }
2087
2088         dev = p2p_create_device(p2p, addr);
2089         if (dev == NULL)
2090                 return NULL;
2091
2092         p2p_add_dev_info(p2p, addr, dev, msg);
2093
2094         return dev;
2095 }
2096
2097
2098 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
2099 {
2100         if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
2101                 return 1;
2102         if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
2103             WPA_GET_BE32(&req_dev_type[2]) == 0 &&
2104             WPA_GET_BE16(&req_dev_type[6]) == 0)
2105                 return 1; /* Category match with wildcard OUI/sub-category */
2106         return 0;
2107 }
2108
2109
2110 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
2111                         size_t num_req_dev_type)
2112 {
2113         size_t i;
2114         for (i = 0; i < num_req_dev_type; i++) {
2115                 if (dev_type_match(dev_type, req_dev_type[i]))
2116                         return 1;
2117         }
2118         return 0;
2119 }
2120
2121
2122 /**
2123  * p2p_match_dev_type - Match local device type with requested type
2124  * @p2p: P2P module context from p2p_init()
2125  * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
2126  * Returns: 1 on match, 0 on mismatch
2127  *
2128  * This function can be used to match the Requested Device Type attribute in
2129  * WPS IE with the local device types for deciding whether to reply to a Probe
2130  * Request frame.
2131  */
2132 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
2133 {
2134         struct wps_parse_attr attr;
2135         size_t i;
2136
2137         if (wps_parse_msg(wps, &attr))
2138                 return 1; /* assume no Requested Device Type attributes */
2139
2140         if (attr.num_req_dev_type == 0)
2141                 return 1; /* no Requested Device Type attributes -> match */
2142
2143         if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
2144                                 attr.num_req_dev_type))
2145                 return 1; /* Own Primary Device Type matches */
2146
2147         for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) {
2148                 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
2149                                         attr.req_dev_type,
2150                                         attr.num_req_dev_type))
2151                         return 1; /* Own Secondary Device Type matches */
2152         }
2153
2154         /* No matching device type found */
2155         return 0;
2156 }
2157
2158
2159 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p,
2160                                          const u8 *query_hash,
2161                                          u8 query_count)
2162 {
2163         struct wpabuf *buf;
2164         u8 *len;
2165         int pw_id = -1;
2166         size_t extra = 0;
2167
2168 #ifdef CONFIG_WIFI_DISPLAY
2169         if (p2p->wfd_ie_probe_resp)
2170                 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
2171 #endif /* CONFIG_WIFI_DISPLAY */
2172
2173         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2174                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2175
2176         if (query_count)
2177                 extra += MAX_SVC_ADV_IE_LEN;
2178
2179         buf = wpabuf_alloc(1000 + extra);
2180         if (buf == NULL)
2181                 return NULL;
2182
2183         if (p2p->go_neg_peer) {
2184                 /* Advertise immediate availability of WPS credential */
2185                 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
2186         }
2187
2188         if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
2189                 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
2190                 wpabuf_free(buf);
2191                 return NULL;
2192         }
2193
2194 #ifdef CONFIG_WIFI_DISPLAY
2195         if (p2p->wfd_ie_probe_resp)
2196                 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
2197 #endif /* CONFIG_WIFI_DISPLAY */
2198
2199         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2200                 wpabuf_put_buf(buf,
2201                                p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2202
2203         /* P2P IE */
2204         len = p2p_buf_add_ie_hdr(buf);
2205         p2p_buf_add_capability(buf, p2p->dev_capab &
2206                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2207         if (p2p->ext_listen_interval)
2208                 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
2209                                               p2p->ext_listen_interval);
2210         p2p_buf_add_device_info(buf, p2p, NULL);
2211         p2p_buf_update_ie_hdr(buf, len);
2212
2213         if (query_count) {
2214                 p2p_buf_add_service_instance(buf, p2p, query_count, query_hash,
2215                                              p2p->p2ps_adv_list);
2216         }
2217
2218         return buf;
2219 }
2220
2221
2222 static int p2p_service_find_asp(struct p2p_data *p2p, const u8 *hash)
2223 {
2224         struct p2ps_advertisement *adv_data;
2225         int any_wfa;
2226
2227         p2p_dbg(p2p, "ASP find - ASP list: %p", p2p->p2ps_adv_list);
2228
2229         /* Wildcard org.wi-fi.wfds matches any WFA spec defined service */
2230         any_wfa = os_memcmp(hash, p2p->wild_card_hash, P2PS_HASH_LEN) == 0;
2231
2232         adv_data = p2p->p2ps_adv_list;
2233         while (adv_data) {
2234                 if (os_memcmp(hash, adv_data->hash, P2PS_HASH_LEN) == 0)
2235                         return 1; /* exact hash match */
2236                 if (any_wfa &&
2237                     os_strncmp(adv_data->svc_name, P2PS_WILD_HASH_STR,
2238                                os_strlen(P2PS_WILD_HASH_STR)) == 0)
2239                         return 1; /* WFA service match */
2240                 adv_data = adv_data->next;
2241         }
2242
2243         return 0;
2244 }
2245
2246
2247 static enum p2p_probe_req_status
2248 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2249                 const u8 *bssid, const u8 *ie, size_t ie_len,
2250                 unsigned int rx_freq)
2251 {
2252         struct ieee802_11_elems elems;
2253         struct wpabuf *buf;
2254         struct ieee80211_mgmt *resp;
2255         struct p2p_message msg;
2256         struct wpabuf *ies;
2257         u8 channel, op_class;
2258
2259         if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
2260             ParseFailed) {
2261                 /* Ignore invalid Probe Request frames */
2262                 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
2263                 return P2P_PREQ_MALFORMED;
2264         }
2265
2266         if (elems.p2p == NULL) {
2267                 /* not a P2P probe - ignore it */
2268                 p2p_dbg(p2p, "Not a P2P probe - ignore it");
2269                 return P2P_PREQ_NOT_P2P;
2270         }
2271
2272         if (dst && !is_broadcast_ether_addr(dst) &&
2273             os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2274                 /* Not sent to the broadcast address or our P2P Device Address
2275                  */
2276                 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2277                         MAC2STR(dst));
2278                 return P2P_PREQ_NOT_PROCESSED;
2279         }
2280
2281         if (bssid && !is_broadcast_ether_addr(bssid)) {
2282                 /* Not sent to the Wildcard BSSID */
2283                 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2284                         MAC2STR(bssid));
2285                 return P2P_PREQ_NOT_PROCESSED;
2286         }
2287
2288         if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2289             os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2290             0) {
2291                 /* not using P2P Wildcard SSID - ignore */
2292                 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2293                 return P2P_PREQ_NOT_PROCESSED;
2294         }
2295
2296         if (supp_rates_11b_only(&elems)) {
2297                 /* Indicates support for 11b rates only */
2298                 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2299                 return P2P_PREQ_NOT_P2P;
2300         }
2301
2302         os_memset(&msg, 0, sizeof(msg));
2303         if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2304                 /* Could not parse P2P attributes */
2305                 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2306                 return P2P_PREQ_NOT_P2P;
2307         }
2308
2309         if (msg.service_hash && msg.service_hash_count) {
2310                 const u8 *hash = msg.service_hash;
2311                 u8 i;
2312                 int p2ps_svc_found = 0;
2313
2314                 p2p_dbg(p2p, "in_listen=%d drv_in_listen=%d when received P2PS Probe Request at %u MHz; own Listen channel %u, pending listen freq %u MHz",
2315                         p2p->in_listen, p2p->drv_in_listen, rx_freq,
2316                         p2p->cfg->channel, p2p->pending_listen_freq);
2317
2318                 if (!p2p->in_listen && !p2p->drv_in_listen &&
2319                     p2p->pending_listen_freq && rx_freq &&
2320                     rx_freq != p2p->pending_listen_freq) {
2321                         p2p_dbg(p2p, "Do not reply to Probe Request frame that was received on %u MHz while waiting to start Listen state on %u MHz",
2322                                 rx_freq, p2p->pending_listen_freq);
2323                         p2p_parse_free(&msg);
2324                         return P2P_PREQ_NOT_LISTEN;
2325                 }
2326
2327                 for (i = 0; i < msg.service_hash_count; i++) {
2328                         if (p2p_service_find_asp(p2p, hash)) {
2329                                 p2p_dbg(p2p, "Service Hash match found: "
2330                                         MACSTR, MAC2STR(hash));
2331                                 p2ps_svc_found = 1;
2332                                 break;
2333                         }
2334                         hash += P2PS_HASH_LEN;
2335                 }
2336
2337                 /* Probed hash unknown */
2338                 if (!p2ps_svc_found) {
2339                         p2p_dbg(p2p, "No Service Hash match found");
2340                         p2p_parse_free(&msg);
2341                         return P2P_PREQ_NOT_PROCESSED;
2342                 }
2343         } else {
2344                 /* This is not a P2PS Probe Request */
2345                 p2p_dbg(p2p, "No P2PS Hash in Probe Request");
2346
2347                 if (!p2p->in_listen || !p2p->drv_in_listen) {
2348                         /* not in Listen state - ignore Probe Request */
2349                         p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
2350                                 p2p->in_listen, p2p->drv_in_listen);
2351                         p2p_parse_free(&msg);
2352                         return P2P_PREQ_NOT_LISTEN;
2353                 }
2354         }
2355
2356         if (msg.device_id &&
2357             os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2358                 /* Device ID did not match */
2359                 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2360                         MAC2STR(msg.device_id));
2361                 p2p_parse_free(&msg);
2362                 return P2P_PREQ_NOT_PROCESSED;
2363         }
2364
2365         /* Check Requested Device Type match */
2366         if (msg.wps_attributes &&
2367             !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2368                 /* No match with Requested Device Type */
2369                 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2370                 p2p_parse_free(&msg);
2371                 return P2P_PREQ_NOT_PROCESSED;
2372         }
2373
2374         if (!p2p->cfg->send_probe_resp) {
2375                 /* Response generated elsewhere */
2376                 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2377                 p2p_parse_free(&msg);
2378                 return P2P_PREQ_NOT_PROCESSED;
2379         }
2380
2381         p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2382
2383         /*
2384          * We do not really have a specific BSS that this frame is advertising,
2385          * so build a frame that has some information in valid format. This is
2386          * really only used for discovery purposes, not to learn exact BSS
2387          * parameters.
2388          */
2389         ies = p2p_build_probe_resp_ies(p2p, msg.service_hash,
2390                                        msg.service_hash_count);
2391         p2p_parse_free(&msg);
2392         if (ies == NULL)
2393                 return P2P_PREQ_NOT_PROCESSED;
2394
2395         buf = wpabuf_alloc(200 + wpabuf_len(ies));
2396         if (buf == NULL) {
2397                 wpabuf_free(ies);
2398                 return P2P_PREQ_NOT_PROCESSED;
2399         }
2400
2401         resp = wpabuf_put(buf, offsetof(struct ieee80211_mgmt,
2402                                         u.probe_resp.variable));
2403
2404         resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2405                                            (WLAN_FC_STYPE_PROBE_RESP << 4));
2406         os_memcpy(resp->da, addr, ETH_ALEN);
2407         os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2408         os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2409         resp->u.probe_resp.beacon_int = host_to_le16(100);
2410         /* hardware or low-level driver will setup seq_ctrl and timestamp */
2411         resp->u.probe_resp.capab_info =
2412                 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2413                              WLAN_CAPABILITY_PRIVACY |
2414                              WLAN_CAPABILITY_SHORT_SLOT_TIME);
2415
2416         wpabuf_put_u8(buf, WLAN_EID_SSID);
2417         wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2418         wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2419
2420         wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2421         wpabuf_put_u8(buf, 8);
2422         wpabuf_put_u8(buf, (60 / 5) | 0x80);
2423         wpabuf_put_u8(buf, 90 / 5);
2424         wpabuf_put_u8(buf, (120 / 5) | 0x80);
2425         wpabuf_put_u8(buf, 180 / 5);
2426         wpabuf_put_u8(buf, (240 / 5) | 0x80);
2427         wpabuf_put_u8(buf, 360 / 5);
2428         wpabuf_put_u8(buf, 480 / 5);
2429         wpabuf_put_u8(buf, 540 / 5);
2430
2431         if (!rx_freq) {
2432                 channel = p2p->cfg->channel;
2433         } else if (p2p_freq_to_channel(rx_freq, &op_class, &channel)) {
2434                 wpabuf_free(ies);
2435                 wpabuf_free(buf);
2436                 return P2P_PREQ_NOT_PROCESSED;
2437         }
2438
2439         wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2440         wpabuf_put_u8(buf, 1);
2441         wpabuf_put_u8(buf, channel);
2442
2443         wpabuf_put_buf(buf, ies);
2444         wpabuf_free(ies);
2445
2446         p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf, rx_freq);
2447
2448         wpabuf_free(buf);
2449
2450         return P2P_PREQ_PROCESSED;
2451 }
2452
2453
2454 enum p2p_probe_req_status
2455 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2456                  const u8 *bssid, const u8 *ie, size_t ie_len,
2457                  unsigned int rx_freq)
2458 {
2459         enum p2p_probe_req_status res;
2460
2461         p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2462
2463         res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len, rx_freq);
2464         if (res != P2P_PREQ_PROCESSED && res != P2P_PREQ_NOT_PROCESSED)
2465                 return res;
2466
2467         /*
2468          * Activate a pending GO Negotiation/Invite flow if a received Probe
2469          * Request frame is from an expected peer. Some devices may share the
2470          * same address for P2P and non-P2P STA running simultaneously. The
2471          * P2P_PREQ_PROCESSED and P2P_PREQ_NOT_PROCESSED p2p_reply_probe()
2472          * return values verified above ensure we are handling a Probe Request
2473          * frame from a P2P peer.
2474          */
2475         if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2476             p2p->go_neg_peer &&
2477             os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2478             == 0 &&
2479             !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2480                 /* Received a Probe Request from GO Negotiation peer */
2481                 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2482                 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2483                 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2484                 return res;
2485         }
2486
2487         if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2488             p2p->invite_peer &&
2489             (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2490             os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2491             == 0) {
2492                 /* Received a Probe Request from Invite peer */
2493                 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2494                 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2495                 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2496                 return res;
2497         }
2498
2499         return res;
2500 }
2501
2502
2503 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2504                                     u8 *buf, size_t len, struct wpabuf *p2p_ie)
2505 {
2506         struct wpabuf *tmp;
2507         u8 *lpos;
2508         size_t tmplen;
2509         int res;
2510         u8 group_capab;
2511         struct p2p_message msg;
2512
2513         if (p2p_ie == NULL)
2514                 return 0; /* WLAN AP is not a P2P manager */
2515
2516         os_memset(&msg, 0, sizeof(msg));
2517         if (p2p_parse_p2p_ie(p2p_ie, &msg) < 0)
2518                 return 0;
2519
2520         p2p_dbg(p2p, "BSS P2P manageability %s",
2521                 msg.manageability ? "enabled" : "disabled");
2522
2523         if (!msg.manageability)
2524                 return 0;
2525
2526         /*
2527          * (Re)Association Request - P2P IE
2528          * P2P Capability attribute (shall be present)
2529          * P2P Interface attribute (present if concurrent device and
2530          *      P2P Management is enabled)
2531          */
2532         tmp = wpabuf_alloc(200);
2533         if (tmp == NULL)
2534                 return -1;
2535
2536         lpos = p2p_buf_add_ie_hdr(tmp);
2537         group_capab = 0;
2538         if (p2p->num_groups > 0) {
2539                 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2540                 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2541                     (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2542                     p2p->cross_connect)
2543                         group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2544         }
2545         p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2546         if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2547             (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2548                 p2p_buf_add_p2p_interface(tmp, p2p);
2549         p2p_buf_update_ie_hdr(tmp, lpos);
2550
2551         tmplen = wpabuf_len(tmp);
2552         if (tmplen > len)
2553                 res = -1;
2554         else {
2555                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2556                 res = tmplen;
2557         }
2558         wpabuf_free(tmp);
2559
2560         return res;
2561 }
2562
2563
2564 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2565                      size_t len, int p2p_group, struct wpabuf *p2p_ie)
2566 {
2567         struct wpabuf *tmp;
2568         u8 *lpos;
2569         struct p2p_device *peer;
2570         size_t tmplen;
2571         int res;
2572         size_t extra = 0;
2573
2574         if (!p2p_group)
2575                 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2576
2577 #ifdef CONFIG_WIFI_DISPLAY
2578         if (p2p->wfd_ie_assoc_req)
2579                 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2580 #endif /* CONFIG_WIFI_DISPLAY */
2581
2582         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2583                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2584
2585         /*
2586          * (Re)Association Request - P2P IE
2587          * P2P Capability attribute (shall be present)
2588          * Extended Listen Timing (may be present)
2589          * P2P Device Info attribute (shall be present)
2590          */
2591         tmp = wpabuf_alloc(200 + extra);
2592         if (tmp == NULL)
2593                 return -1;
2594
2595 #ifdef CONFIG_WIFI_DISPLAY
2596         if (p2p->wfd_ie_assoc_req)
2597                 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2598 #endif /* CONFIG_WIFI_DISPLAY */
2599
2600         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2601                 wpabuf_put_buf(tmp,
2602                                p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2603
2604         peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2605
2606         lpos = p2p_buf_add_ie_hdr(tmp);
2607         p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2608         if (p2p->ext_listen_interval)
2609                 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2610                                               p2p->ext_listen_interval);
2611         p2p_buf_add_device_info(tmp, p2p, peer);
2612         p2p_buf_update_ie_hdr(tmp, lpos);
2613
2614         tmplen = wpabuf_len(tmp);
2615         if (tmplen > len)
2616                 res = -1;
2617         else {
2618                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2619                 res = tmplen;
2620         }
2621         wpabuf_free(tmp);
2622
2623         return res;
2624 }
2625
2626
2627 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2628 {
2629         struct wpabuf *p2p_ie;
2630         int ret;
2631
2632         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2633         if (p2p_ie == NULL)
2634                 return 0;
2635
2636         ret = p2p_attr_text(p2p_ie, buf, end);
2637         wpabuf_free(p2p_ie);
2638         return ret;
2639 }
2640
2641
2642 struct p2ps_advertisement *
2643 p2p_service_p2ps_id(struct p2p_data *p2p, u32 adv_id)
2644 {
2645         struct p2ps_advertisement *adv_data;
2646
2647         if (!p2p)
2648                 return NULL;
2649
2650         adv_data = p2p->p2ps_adv_list;
2651         while (adv_data) {
2652                 if (adv_data->id == adv_id)
2653                         return adv_data;
2654                 adv_data = adv_data->next;
2655         }
2656
2657         return NULL;
2658 }
2659
2660
2661 int p2p_service_del_asp(struct p2p_data *p2p, u32 adv_id)
2662 {
2663         struct p2ps_advertisement *adv_data;
2664         struct p2ps_advertisement **prior;
2665
2666         if (!p2p)
2667                 return -1;
2668
2669         adv_data = p2p->p2ps_adv_list;
2670         prior = &p2p->p2ps_adv_list;
2671         while (adv_data) {
2672                 if (adv_data->id == adv_id) {
2673                         p2p_dbg(p2p, "Delete ASP adv_id=0x%x", adv_id);
2674                         *prior = adv_data->next;
2675                         os_free(adv_data);
2676                         return 0;
2677                 }
2678                 prior = &adv_data->next;
2679                 adv_data = adv_data->next;
2680         }
2681
2682         return -1;
2683 }
2684
2685
2686 int p2p_service_add_asp(struct p2p_data *p2p, int auto_accept, u32 adv_id,
2687                         const char *adv_str, u8 svc_state, u16 config_methods,
2688                         const char *svc_info, const u8 *cpt_priority)
2689 {
2690         struct p2ps_advertisement *adv_data, *tmp, **prev;
2691         u8 buf[P2PS_HASH_LEN];
2692         size_t adv_data_len, adv_len, info_len = 0;
2693         int i;
2694
2695         if (!p2p || !adv_str || !adv_str[0] || !cpt_priority)
2696                 return -1;
2697
2698         if (!(config_methods & p2p->cfg->config_methods)) {
2699                 p2p_dbg(p2p, "Config methods not supported svc: 0x%x dev: 0x%x",
2700                         config_methods, p2p->cfg->config_methods);
2701                 return -1;
2702         }
2703
2704         if (!p2ps_gen_hash(p2p, adv_str, buf))
2705                 return -1;
2706
2707         if (svc_info)
2708                 info_len = os_strlen(svc_info);
2709         adv_len = os_strlen(adv_str);
2710         adv_data_len = sizeof(struct p2ps_advertisement) + adv_len + 1 +
2711                 info_len + 1;
2712
2713         adv_data = os_zalloc(adv_data_len);
2714         if (!adv_data)
2715                 return -1;
2716
2717         os_memcpy(adv_data->hash, buf, P2PS_HASH_LEN);
2718         adv_data->id = adv_id;
2719         adv_data->state = svc_state;
2720         adv_data->config_methods = config_methods & p2p->cfg->config_methods;
2721         adv_data->auto_accept = (u8) auto_accept;
2722         os_memcpy(adv_data->svc_name, adv_str, adv_len);
2723
2724         for (i = 0; cpt_priority[i] && i < P2PS_FEATURE_CAPAB_CPT_MAX; i++) {
2725                 adv_data->cpt_priority[i] = cpt_priority[i];
2726                 adv_data->cpt_mask |= cpt_priority[i];
2727         }
2728
2729         if (svc_info && info_len) {
2730                 adv_data->svc_info = &adv_data->svc_name[adv_len + 1];
2731                 os_memcpy(adv_data->svc_info, svc_info, info_len);
2732         }
2733
2734         /*
2735          * Group Advertisements by service string. They do not need to be
2736          * sorted, but groups allow easier Probe Response instance grouping
2737          */
2738         tmp = p2p->p2ps_adv_list;
2739         prev = &p2p->p2ps_adv_list;
2740         while (tmp) {
2741                 if (tmp->id == adv_data->id) {
2742                         if (os_strcmp(tmp->svc_name, adv_data->svc_name) != 0) {
2743                                 os_free(adv_data);
2744                                 return -1;
2745                         }
2746                         adv_data->next = tmp->next;
2747                         *prev = adv_data;
2748                         os_free(tmp);
2749                         goto inserted;
2750                 } else {
2751                         if (os_strcmp(tmp->svc_name, adv_data->svc_name) == 0) {
2752                                 adv_data->next = tmp->next;
2753                                 tmp->next = adv_data;
2754                                 goto inserted;
2755                         }
2756                 }
2757                 prev = &tmp->next;
2758                 tmp = tmp->next;
2759         }
2760
2761         /* No svc_name match found */
2762         adv_data->next = p2p->p2ps_adv_list;
2763         p2p->p2ps_adv_list = adv_data;
2764
2765 inserted:
2766         p2p_dbg(p2p,
2767                 "Added ASP advertisement adv_id=0x%x config_methods=0x%x svc_state=0x%x adv_str='%s' cpt_mask=0x%x",
2768                 adv_id, adv_data->config_methods, svc_state, adv_str,
2769                 adv_data->cpt_mask);
2770
2771         return 0;
2772 }
2773
2774
2775 void p2p_service_flush_asp(struct p2p_data *p2p)
2776 {
2777         struct p2ps_advertisement *adv, *prev;
2778
2779         if (!p2p)
2780                 return;
2781
2782         adv = p2p->p2ps_adv_list;
2783         while (adv) {
2784                 prev = adv;
2785                 adv = adv->next;
2786                 os_free(prev);
2787         }
2788
2789         p2p->p2ps_adv_list = NULL;
2790         p2p_dbg(p2p, "All ASP advertisements flushed");
2791 }
2792
2793
2794 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2795 {
2796         struct p2p_message msg;
2797
2798         os_memset(&msg, 0, sizeof(msg));
2799         if (p2p_parse_p2p_ie(p2p_ie, &msg))
2800                 return -1;
2801
2802         if (msg.p2p_device_addr) {
2803                 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2804                 return 0;
2805         } else if (msg.device_id) {
2806                 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2807                 return 0;
2808         }
2809         return -1;
2810 }
2811
2812
2813 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2814 {
2815         struct wpabuf *p2p_ie;
2816         int ret;
2817
2818         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2819                                              P2P_IE_VENDOR_TYPE);
2820         if (p2p_ie == NULL)
2821                 return -1;
2822         ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2823         wpabuf_free(p2p_ie);
2824         return ret;
2825 }
2826
2827
2828 static void p2p_clear_go_neg(struct p2p_data *p2p)
2829 {
2830         p2p->go_neg_peer = NULL;
2831         p2p_clear_timeout(p2p);
2832         p2p_set_state(p2p, P2P_IDLE);
2833 }
2834
2835
2836 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2837 {
2838         if (p2p->go_neg_peer == NULL) {
2839                 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2840                 return; /* No pending Group Formation */
2841         }
2842
2843         if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2844             0) {
2845                 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2846                         MACSTR " (GO Negotiation peer " MACSTR ")",
2847                         MAC2STR(mac_addr),
2848                         MAC2STR(p2p->go_neg_peer->intended_addr));
2849                 return; /* Ignore unexpected peer address */
2850         }
2851
2852         p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2853                 MAC2STR(mac_addr));
2854
2855         p2p_clear_go_neg(p2p);
2856 }
2857
2858
2859 void p2p_group_formation_failed(struct p2p_data *p2p)
2860 {
2861         if (p2p->go_neg_peer == NULL) {
2862                 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2863                 return; /* No pending Group Formation */
2864         }
2865
2866         p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2867                 MAC2STR(p2p->go_neg_peer->intended_addr));
2868
2869         p2p_clear_go_neg(p2p);
2870 }
2871
2872
2873 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2874 {
2875         struct p2p_data *p2p;
2876
2877         if (cfg->max_peers < 1 ||
2878             cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
2879                 return NULL;
2880
2881         p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2882         if (p2p == NULL)
2883                 return NULL;
2884         p2p->cfg = (struct p2p_config *) (p2p + 1);
2885         os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2886         if (cfg->dev_name)
2887                 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2888         if (cfg->manufacturer)
2889                 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2890         if (cfg->model_name)
2891                 p2p->cfg->model_name = os_strdup(cfg->model_name);
2892         if (cfg->model_number)
2893                 p2p->cfg->model_number = os_strdup(cfg->model_number);
2894         if (cfg->serial_number)
2895                 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2896         if (cfg->pref_chan) {
2897                 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2898                                                 sizeof(struct p2p_channel));
2899                 if (p2p->cfg->pref_chan) {
2900                         os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2901                                   cfg->num_pref_chan *
2902                                   sizeof(struct p2p_channel));
2903                 } else
2904                         p2p->cfg->num_pref_chan = 0;
2905         }
2906
2907         p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash);
2908
2909         p2p->min_disc_int = 1;
2910         p2p->max_disc_int = 3;
2911         p2p->max_disc_tu = -1;
2912
2913         if (os_get_random(&p2p->next_tie_breaker, 1) < 0)
2914                 p2p->next_tie_breaker = 0;
2915         p2p->next_tie_breaker &= 0x01;
2916         if (cfg->sd_request)
2917                 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2918         p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2919         if (cfg->concurrent_operations)
2920                 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2921         p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2922
2923         dl_list_init(&p2p->devices);
2924
2925         p2p->go_timeout = 100;
2926         p2p->client_timeout = 20;
2927         p2p->num_p2p_sd_queries = 0;
2928
2929         p2p_dbg(p2p, "initialized");
2930         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2931         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2932
2933         return p2p;
2934 }
2935
2936
2937 void p2p_deinit(struct p2p_data *p2p)
2938 {
2939 #ifdef CONFIG_WIFI_DISPLAY
2940         wpabuf_free(p2p->wfd_ie_beacon);
2941         wpabuf_free(p2p->wfd_ie_probe_req);
2942         wpabuf_free(p2p->wfd_ie_probe_resp);
2943         wpabuf_free(p2p->wfd_ie_assoc_req);
2944         wpabuf_free(p2p->wfd_ie_invitation);
2945         wpabuf_free(p2p->wfd_ie_prov_disc_req);
2946         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2947         wpabuf_free(p2p->wfd_ie_go_neg);
2948         wpabuf_free(p2p->wfd_dev_info);
2949         wpabuf_free(p2p->wfd_assoc_bssid);
2950         wpabuf_free(p2p->wfd_coupled_sink_info);
2951 #endif /* CONFIG_WIFI_DISPLAY */
2952
2953         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2954         eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2955         eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2956         p2p_flush(p2p);
2957         p2p_free_req_dev_types(p2p);
2958         os_free(p2p->cfg->dev_name);
2959         os_free(p2p->cfg->manufacturer);
2960         os_free(p2p->cfg->model_name);
2961         os_free(p2p->cfg->model_number);
2962         os_free(p2p->cfg->serial_number);
2963         os_free(p2p->cfg->pref_chan);
2964         os_free(p2p->groups);
2965         p2ps_prov_free(p2p);
2966         wpabuf_free(p2p->sd_resp);
2967         os_free(p2p->after_scan_tx);
2968         p2p_remove_wps_vendor_extensions(p2p);
2969         os_free(p2p->no_go_freq.range);
2970         p2p_service_flush_asp(p2p);
2971
2972         os_free(p2p);
2973 }
2974
2975
2976 void p2p_flush(struct p2p_data *p2p)
2977 {
2978         struct p2p_device *dev, *prev;
2979
2980         p2p_ext_listen(p2p, 0, 0);
2981         p2p_stop_find(p2p);
2982         dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2983                               list) {
2984                 dl_list_del(&dev->list);
2985                 p2p_device_free(p2p, dev);
2986         }
2987         p2p_free_sd_queries(p2p);
2988         os_free(p2p->after_scan_tx);
2989         p2p->after_scan_tx = NULL;
2990         p2p->ssid_set = 0;
2991 }
2992
2993
2994 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2995 {
2996         struct p2p_device *dev;
2997
2998         dev = p2p_get_device(p2p, addr);
2999         if (dev == NULL)
3000                 return -1;
3001
3002         p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
3003
3004         if (p2p->go_neg_peer == dev) {
3005                 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
3006                 p2p->go_neg_peer = NULL;
3007         }
3008
3009         dev->wps_method = WPS_NOT_READY;
3010         dev->oob_pw_id = 0;
3011         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
3012         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
3013
3014         /* Check if after_scan_tx is for this peer. If so free it */
3015         if (p2p->after_scan_tx &&
3016             os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
3017                 os_free(p2p->after_scan_tx);
3018                 p2p->after_scan_tx = NULL;
3019         }
3020
3021         return 0;
3022 }
3023
3024
3025 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
3026 {
3027         os_free(p2p->cfg->dev_name);
3028         if (dev_name) {
3029                 p2p->cfg->dev_name = os_strdup(dev_name);
3030                 if (p2p->cfg->dev_name == NULL)
3031                         return -1;
3032         } else
3033                 p2p->cfg->dev_name = NULL;
3034         return 0;
3035 }
3036
3037
3038 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
3039 {
3040         os_free(p2p->cfg->manufacturer);
3041         p2p->cfg->manufacturer = NULL;
3042         if (manufacturer) {
3043                 p2p->cfg->manufacturer = os_strdup(manufacturer);
3044                 if (p2p->cfg->manufacturer == NULL)
3045                         return -1;
3046         }
3047
3048         return 0;
3049 }
3050
3051
3052 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
3053 {
3054         os_free(p2p->cfg->model_name);
3055         p2p->cfg->model_name = NULL;
3056         if (model_name) {
3057                 p2p->cfg->model_name = os_strdup(model_name);
3058                 if (p2p->cfg->model_name == NULL)
3059                         return -1;
3060         }
3061
3062         return 0;
3063 }
3064
3065
3066 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
3067 {
3068         os_free(p2p->cfg->model_number);
3069         p2p->cfg->model_number = NULL;
3070         if (model_number) {
3071                 p2p->cfg->model_number = os_strdup(model_number);
3072                 if (p2p->cfg->model_number == NULL)
3073                         return -1;
3074         }
3075
3076         return 0;
3077 }
3078
3079
3080 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
3081 {
3082         os_free(p2p->cfg->serial_number);
3083         p2p->cfg->serial_number = NULL;
3084         if (serial_number) {
3085                 p2p->cfg->serial_number = os_strdup(serial_number);
3086                 if (p2p->cfg->serial_number == NULL)
3087                         return -1;
3088         }
3089
3090         return 0;
3091 }
3092
3093
3094 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
3095 {
3096         p2p->cfg->config_methods = config_methods;
3097 }
3098
3099
3100 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
3101 {
3102         os_memcpy(p2p->cfg->uuid, uuid, 16);
3103 }
3104
3105
3106 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
3107 {
3108         os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
3109         return 0;
3110 }
3111
3112
3113 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
3114                           size_t num_dev_types)
3115 {
3116         if (num_dev_types > P2P_SEC_DEVICE_TYPES)
3117                 num_dev_types = P2P_SEC_DEVICE_TYPES;
3118         p2p->cfg->num_sec_dev_types = num_dev_types;
3119         os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
3120         return 0;
3121 }
3122
3123
3124 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
3125 {
3126         int i;
3127
3128         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3129                 wpabuf_free(p2p->wps_vendor_ext[i]);
3130                 p2p->wps_vendor_ext[i] = NULL;
3131         }
3132 }
3133
3134
3135 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
3136                                  const struct wpabuf *vendor_ext)
3137 {
3138         int i;
3139
3140         if (vendor_ext == NULL)
3141                 return -1;
3142
3143         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3144                 if (p2p->wps_vendor_ext[i] == NULL)
3145                         break;
3146         }
3147         if (i >= P2P_MAX_WPS_VENDOR_EXT)
3148                 return -1;
3149
3150         p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
3151         if (p2p->wps_vendor_ext[i] == NULL)
3152                 return -1;
3153
3154         return 0;
3155 }
3156
3157
3158 int p2p_set_country(struct p2p_data *p2p, const char *country)
3159 {
3160         os_memcpy(p2p->cfg->country, country, 3);
3161         return 0;
3162 }
3163
3164
3165 static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev)
3166 {
3167         int res;
3168
3169         if (dev->sd_pending_bcast_queries == 0) {
3170                 /* Initialize with total number of registered broadcast
3171                  * SD queries. */
3172                 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
3173         }
3174
3175         res = p2p_start_sd(p2p, dev);
3176         if (res == -2)
3177                 return -2;
3178         if (res == 0)
3179                 return 1;
3180
3181         if (dev->req_config_methods &&
3182             !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
3183                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3184                         MACSTR " (config methods 0x%x)",
3185                         MAC2STR(dev->info.p2p_device_addr),
3186                         dev->req_config_methods);
3187                 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
3188                         return 1;
3189         }
3190
3191         return 0;
3192 }
3193
3194
3195 void p2p_continue_find(struct p2p_data *p2p)
3196 {
3197         struct p2p_device *dev;
3198         int found, res;
3199
3200         p2p_set_state(p2p, P2P_SEARCH);
3201
3202         /* Continue from the device following the last iteration */
3203         found = 0;
3204         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3205                 if (dev == p2p->last_p2p_find_oper) {
3206                         found = 1;
3207                         continue;
3208                 }
3209                 if (!found)
3210                         continue;
3211                 res = p2p_pre_find_operation(p2p, dev);
3212                 if (res > 0) {
3213                         p2p->last_p2p_find_oper = dev;
3214                         return;
3215                 }
3216                 if (res == -2)
3217                         goto skip_sd;
3218         }
3219
3220         /*
3221          * Wrap around to the beginning of the list and continue until the last
3222          * iteration device.
3223          */
3224         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3225                 res = p2p_pre_find_operation(p2p, dev);
3226                 if (res > 0) {
3227                         p2p->last_p2p_find_oper = dev;
3228                         return;
3229                 }
3230                 if (res == -2)
3231                         goto skip_sd;
3232                 if (dev == p2p->last_p2p_find_oper)
3233                         break;
3234         }
3235
3236 skip_sd:
3237         os_memset(p2p->sd_query_no_ack, 0, ETH_ALEN);
3238         p2p_listen_in_find(p2p, 1);
3239 }
3240
3241
3242 static void p2p_sd_cb(struct p2p_data *p2p, int success)
3243 {
3244         p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
3245                 success);
3246         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3247
3248         if (!success) {
3249                 if (p2p->sd_peer) {
3250                         if (is_zero_ether_addr(p2p->sd_query_no_ack)) {
3251                                 os_memcpy(p2p->sd_query_no_ack,
3252                                           p2p->sd_peer->info.p2p_device_addr,
3253                                           ETH_ALEN);
3254                                 p2p_dbg(p2p,
3255                                         "First SD Query no-ACK in this search iteration: "
3256                                         MACSTR, MAC2STR(p2p->sd_query_no_ack));
3257                         }
3258                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3259                 }
3260                 p2p->sd_peer = NULL;
3261                 if (p2p->state != P2P_IDLE)
3262                         p2p_continue_find(p2p);
3263                 return;
3264         }
3265
3266         if (p2p->sd_peer == NULL) {
3267                 p2p_dbg(p2p, "No SD peer entry known");
3268                 if (p2p->state != P2P_IDLE)
3269                         p2p_continue_find(p2p);
3270                 return;
3271         }
3272
3273         if (p2p->sd_query && p2p->sd_query->for_all_peers) {
3274                 /* Update the pending broadcast SD query count for this device
3275                  */
3276                 p2p->sd_peer->sd_pending_bcast_queries--;
3277
3278                 /*
3279                  * If there are no pending broadcast queries for this device,
3280                  * mark it as done (-1).
3281                  */
3282                 if (p2p->sd_peer->sd_pending_bcast_queries == 0)
3283                         p2p->sd_peer->sd_pending_bcast_queries = -1;
3284         }
3285
3286         /* Wait for response from the peer */
3287         p2p_set_state(p2p, P2P_SD_DURING_FIND);
3288         p2p_set_timeout(p2p, 0, 200000);
3289 }
3290
3291
3292 /**
3293  * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
3294  * @p2p: P2P module context from p2p_init()
3295  */
3296 static void p2p_retry_pd(struct p2p_data *p2p)
3297 {
3298         struct p2p_device *dev;
3299
3300         /*
3301          * Retry the prov disc req attempt only for the peer that the user had
3302          * requested.
3303          */
3304
3305         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3306                 if (os_memcmp(p2p->pending_pd_devaddr,
3307                               dev->info.p2p_device_addr, ETH_ALEN) != 0)
3308                         continue;
3309                 if (!dev->req_config_methods)
3310                         continue;
3311
3312                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3313                         MACSTR " (config methods 0x%x)",
3314                         MAC2STR(dev->info.p2p_device_addr),
3315                         dev->req_config_methods);
3316                 p2p_send_prov_disc_req(p2p, dev,
3317                                        dev->flags & P2P_DEV_PD_FOR_JOIN,
3318                                        p2p->pd_force_freq);
3319                 return;
3320         }
3321 }
3322
3323
3324 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
3325 {
3326         p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
3327                 success);
3328
3329         /*
3330          * Postpone resetting the pending action state till after we actually
3331          * time out. This allows us to take some action like notifying any
3332          * interested parties about no response to the request.
3333          *
3334          * When the timer (below) goes off we check in IDLE, SEARCH, or
3335          * LISTEN_ONLY state, which are the only allowed states to issue a PD
3336          * requests in, if this was still pending and then raise notification.
3337          */
3338
3339         if (!success) {
3340                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3341
3342                 if (p2p->user_initiated_pd &&
3343                     (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
3344                 {
3345                         /* Retry request from timeout to avoid busy loops */
3346                         p2p->pending_action_state = P2P_PENDING_PD;
3347                         p2p_set_timeout(p2p, 0, 50000);
3348                 } else if (p2p->state != P2P_IDLE)
3349                         p2p_continue_find(p2p);
3350                 else if (p2p->user_initiated_pd) {
3351                         p2p->pending_action_state = P2P_PENDING_PD;
3352                         p2p_set_timeout(p2p, 0, 300000);
3353                 }
3354                 return;
3355         }
3356
3357         /*
3358          * If after PD Request the peer doesn't expect to receive PD Response
3359          * the PD Request ACK indicates a completion of the current PD. This
3360          * happens only on the advertiser side sending the follow-on PD Request
3361          * with the status different than 12 (Success: accepted by user).
3362          */
3363         if (p2p->p2ps_prov && !p2p->p2ps_prov->pd_seeker &&
3364             p2p->p2ps_prov->status != P2P_SC_SUCCESS_DEFERRED) {
3365                 p2p_dbg(p2p, "P2PS PD completion on Follow-on PD Request ACK");
3366
3367                 if (p2p->send_action_in_progress) {
3368                         p2p->send_action_in_progress = 0;
3369                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3370                 }
3371
3372                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3373
3374                 if (p2p->cfg->p2ps_prov_complete) {
3375                         p2p->cfg->p2ps_prov_complete(
3376                                 p2p->cfg->cb_ctx,
3377                                 p2p->p2ps_prov->status,
3378                                 p2p->p2ps_prov->adv_mac,
3379                                 p2p->p2ps_prov->adv_mac,
3380                                 p2p->p2ps_prov->session_mac,
3381                                 NULL, p2p->p2ps_prov->adv_id,
3382                                 p2p->p2ps_prov->session_id,
3383                                 0, 0, NULL, 0, 0, 0,
3384                                 NULL, NULL, 0, 0, NULL, 0);
3385                 }
3386
3387                 if (p2p->user_initiated_pd)
3388                         p2p_reset_pending_pd(p2p);
3389
3390                 p2ps_prov_free(p2p);
3391                 return;
3392         }
3393
3394         /*
3395          * This postponing, of resetting pending_action_state, needs to be
3396          * done only for user initiated PD requests and not internal ones.
3397          */
3398         if (p2p->user_initiated_pd)
3399                 p2p->pending_action_state = P2P_PENDING_PD;
3400         else
3401                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3402
3403         /* Wait for response from the peer */
3404         if (p2p->state == P2P_SEARCH)
3405                 p2p_set_state(p2p, P2P_PD_DURING_FIND);
3406         p2p_set_timeout(p2p, 0, 200000);
3407 }
3408
3409
3410 static int p2p_check_after_scan_tx_continuation(struct p2p_data *p2p)
3411 {
3412         if (p2p->after_scan_tx_in_progress) {
3413                 p2p->after_scan_tx_in_progress = 0;
3414                 if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
3415                     p2p_run_after_scan(p2p))
3416                         return 1;
3417                 if (p2p->state == P2P_SEARCH) {
3418                         p2p_dbg(p2p, "Continue find after after_scan_tx completion");
3419                         p2p_continue_find(p2p);
3420                 }
3421         }
3422
3423         return 0;
3424 }
3425
3426
3427 static void p2p_prov_disc_resp_cb(struct p2p_data *p2p, int success)
3428 {
3429         p2p_dbg(p2p, "Provision Discovery Response TX callback: success=%d",
3430                 success);
3431
3432         if (p2p->send_action_in_progress) {
3433                 p2p->send_action_in_progress = 0;
3434                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3435         }
3436
3437         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3438
3439         if (!success)
3440                 goto continue_search;
3441
3442         if (!p2p->cfg->prov_disc_resp_cb ||
3443             p2p->cfg->prov_disc_resp_cb(p2p->cfg->cb_ctx) < 1)
3444                 goto continue_search;
3445
3446         p2p_dbg(p2p,
3447                 "Post-Provision Discovery operations started - do not try to continue other P2P operations");
3448         return;
3449
3450 continue_search:
3451         p2p_check_after_scan_tx_continuation(p2p);
3452 }
3453
3454
3455 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
3456                          struct os_reltime *rx_time, int level, const u8 *ies,
3457                          size_t ies_len)
3458 {
3459         if (os_reltime_before(rx_time, &p2p->find_start)) {
3460                 /*
3461                  * The driver may have cached (e.g., in cfg80211 BSS table) the
3462                  * scan results for relatively long time. To avoid reporting
3463                  * stale information, update P2P peers only based on results
3464                  * that have based on frames received after the last p2p_find
3465                  * operation was started.
3466                  */
3467                 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
3468                         " (rx_time=%u.%06u find_start=%u.%06u)",
3469                         MAC2STR(bssid), (unsigned int) rx_time->sec,
3470                         (unsigned int) rx_time->usec,
3471                         (unsigned int) p2p->find_start.sec,
3472                         (unsigned int) p2p->find_start.usec);
3473                 return 0;
3474         }
3475
3476         p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
3477
3478         return 0;
3479 }
3480
3481
3482 void p2p_scan_res_handled(struct p2p_data *p2p)
3483 {
3484         if (!p2p->p2p_scan_running) {
3485                 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
3486         }
3487         p2p->p2p_scan_running = 0;
3488         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
3489
3490         if (p2p_run_after_scan(p2p))
3491                 return;
3492         if (p2p->state == P2P_SEARCH)
3493                 p2p_continue_find(p2p);
3494 }
3495
3496
3497 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
3498 {
3499         u8 dev_capab;
3500         u8 *len;
3501
3502 #ifdef CONFIG_WIFI_DISPLAY
3503         if (p2p->wfd_ie_probe_req)
3504                 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
3505 #endif /* CONFIG_WIFI_DISPLAY */
3506
3507         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3508                 wpabuf_put_buf(ies,
3509                                p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3510
3511         len = p2p_buf_add_ie_hdr(ies);
3512
3513         dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3514
3515         /* P2PS requires Probe Request frames to include SD bit */
3516         if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3517                 dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
3518
3519         p2p_buf_add_capability(ies, dev_capab, 0);
3520
3521         if (dev_id)
3522                 p2p_buf_add_device_id(ies, dev_id);
3523         if (p2p->cfg->reg_class && p2p->cfg->channel)
3524                 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
3525                                            p2p->cfg->reg_class,
3526                                            p2p->cfg->channel);
3527         if (p2p->ext_listen_interval)
3528                 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
3529                                               p2p->ext_listen_interval);
3530
3531         if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3532                 p2p_buf_add_service_hash(ies, p2p);
3533
3534         /* TODO: p2p_buf_add_operating_channel() if GO */
3535         p2p_buf_update_ie_hdr(ies, len);
3536 }
3537
3538
3539 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
3540 {
3541         size_t len = 100;
3542
3543 #ifdef CONFIG_WIFI_DISPLAY
3544         if (p2p && p2p->wfd_ie_probe_req)
3545                 len += wpabuf_len(p2p->wfd_ie_probe_req);
3546 #endif /* CONFIG_WIFI_DISPLAY */
3547
3548         if (p2p && p2p->vendor_elem &&
3549             p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3550                 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3551
3552         return len;
3553 }
3554
3555
3556 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
3557 {
3558         return p2p_attr_text(p2p_ie, buf, end);
3559 }
3560
3561
3562 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
3563 {
3564         struct p2p_device *dev = p2p->go_neg_peer;
3565         int timeout;
3566
3567         p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
3568
3569         if (dev == NULL) {
3570                 p2p_dbg(p2p, "No pending GO Negotiation");
3571                 return;
3572         }
3573
3574         if (success) {
3575                 if (dev->flags & P2P_DEV_USER_REJECTED) {
3576                         p2p_set_state(p2p, P2P_IDLE);
3577                         return;
3578                 }
3579         } else if (dev->go_neg_req_sent) {
3580                 /* Cancel the increment from p2p_connect_send() on failure */
3581                 dev->go_neg_req_sent--;
3582         }
3583
3584         if (!success &&
3585             (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
3586             !is_zero_ether_addr(dev->member_in_go_dev)) {
3587                 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
3588                         MAC2STR(dev->info.p2p_device_addr));
3589                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3590                 p2p_send_dev_disc_req(p2p, dev);
3591                 return;
3592         }
3593
3594         /*
3595          * Use P2P find, if needed, to find the other device from its listen
3596          * channel.
3597          */
3598         p2p_set_state(p2p, P2P_CONNECT);
3599         timeout = success ? 500000 : 100000;
3600         if (!success && p2p->go_neg_peer &&
3601             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
3602                 unsigned int r;
3603                 /*
3604                  * Peer is expected to wait our response and we will skip the
3605                  * listen phase. Add some randomness to the wait time here to
3606                  * make it less likely to hit cases where we could end up in
3607                  * sync with peer not listening.
3608                  */
3609                 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
3610                         r = 0;
3611                 timeout += r % 100000;
3612         }
3613         p2p_set_timeout(p2p, 0, timeout);
3614 }
3615
3616
3617 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
3618 {
3619         p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
3620                 success);
3621         if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
3622                 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
3623                 return;
3624         }
3625         p2p_set_state(p2p, P2P_CONNECT);
3626         p2p_set_timeout(p2p, 0, 500000);
3627 }
3628
3629
3630 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
3631                                        const u8 *addr)
3632 {
3633         p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
3634         if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
3635                 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status);
3636                 return;
3637         }
3638
3639         if (success) {
3640                 struct p2p_device *dev;
3641                 dev = p2p_get_device(p2p, addr);
3642                 if (dev &&
3643                     dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
3644                         dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
3645         }
3646
3647         if (p2p->state == P2P_SEARCH || p2p->state == P2P_SD_DURING_FIND)
3648                 p2p_continue_find(p2p);
3649 }
3650
3651
3652 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
3653                                enum p2p_send_action_result result)
3654 {
3655         struct p2p_device *dev;
3656
3657         p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
3658         if (result == P2P_SEND_ACTION_FAILED) {
3659                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3660                 p2p_go_neg_failed(p2p, -1);
3661                 return;
3662         }
3663
3664         dev = p2p->go_neg_peer;
3665
3666         if (result == P2P_SEND_ACTION_NO_ACK) {
3667                 /*
3668                  * Retry GO Negotiation Confirmation
3669                  * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
3670                  * ACK for confirmation.
3671                  */
3672                 if (dev && dev->go_neg_conf &&
3673                     dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
3674                         p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
3675                                 dev->go_neg_conf_sent);
3676                         p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
3677                         if (p2p_send_action(p2p, dev->go_neg_conf_freq,
3678                                             dev->info.p2p_device_addr,
3679                                             p2p->cfg->dev_addr,
3680                                             dev->info.p2p_device_addr,
3681                                             wpabuf_head(dev->go_neg_conf),
3682                                             wpabuf_len(dev->go_neg_conf), 0) >=
3683                             0) {
3684                                 dev->go_neg_conf_sent++;
3685                                 return;
3686                         }
3687                         p2p_dbg(p2p, "Failed to re-send Action frame");
3688
3689                         /*
3690                          * Continue with the assumption that the first attempt
3691                          * went through and just the ACK frame was lost.
3692                          */
3693                 }
3694
3695                 /*
3696                  * It looks like the TX status for GO Negotiation Confirm is
3697                  * often showing failure even when the peer has actually
3698                  * received the frame. Since the peer may change channels
3699                  * immediately after having received the frame, we may not see
3700                  * an Ack for retries, so just dropping a single frame may
3701                  * trigger this. To allow the group formation to succeed if the
3702                  * peer did indeed receive the frame, continue regardless of
3703                  * the TX status.
3704                  */
3705                 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
3706         }
3707
3708         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3709
3710         if (dev == NULL)
3711                 return;
3712
3713         p2p_go_complete(p2p, dev);
3714 }
3715
3716
3717 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3718                         const u8 *src, const u8 *bssid,
3719                         enum p2p_send_action_result result)
3720 {
3721         enum p2p_pending_action_state state;
3722         int success;
3723
3724         p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
3725                 " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)",
3726                 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
3727                 MAC2STR(bssid), result, p2p_state_txt(p2p->state));
3728         success = result == P2P_SEND_ACTION_SUCCESS;
3729         state = p2p->pending_action_state;
3730         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3731         switch (state) {
3732         case P2P_NO_PENDING_ACTION:
3733                 if (p2p->send_action_in_progress) {
3734                         p2p->send_action_in_progress = 0;
3735                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3736                 }
3737                 p2p_check_after_scan_tx_continuation(p2p);
3738                 break;
3739         case P2P_PENDING_GO_NEG_REQUEST:
3740                 p2p_go_neg_req_cb(p2p, success);
3741                 break;
3742         case P2P_PENDING_GO_NEG_RESPONSE:
3743                 p2p_go_neg_resp_cb(p2p, success);
3744                 break;
3745         case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3746                 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3747                 break;
3748         case P2P_PENDING_GO_NEG_CONFIRM:
3749                 p2p_go_neg_conf_cb(p2p, result);
3750                 break;
3751         case P2P_PENDING_SD:
3752                 p2p_sd_cb(p2p, success);
3753                 break;
3754         case P2P_PENDING_PD:
3755                 p2p_prov_disc_cb(p2p, success);
3756                 break;
3757         case P2P_PENDING_PD_RESPONSE:
3758                 p2p_prov_disc_resp_cb(p2p, success);
3759                 break;
3760         case P2P_PENDING_INVITATION_REQUEST:
3761                 p2p_invitation_req_cb(p2p, success);
3762                 break;
3763         case P2P_PENDING_INVITATION_RESPONSE:
3764                 p2p_invitation_resp_cb(p2p, success);
3765                 break;
3766         case P2P_PENDING_DEV_DISC_REQUEST:
3767                 p2p_dev_disc_req_cb(p2p, success);
3768                 break;
3769         case P2P_PENDING_DEV_DISC_RESPONSE:
3770                 p2p_dev_disc_resp_cb(p2p, success);
3771                 break;
3772         case P2P_PENDING_GO_DISC_REQ:
3773                 p2p_go_disc_req_cb(p2p, success);
3774                 break;
3775         }
3776
3777         p2p->after_scan_tx_in_progress = 0;
3778 }
3779
3780
3781 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3782                    unsigned int duration)
3783 {
3784         if (freq == p2p->pending_client_disc_freq) {
3785                 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3786                 p2p->pending_client_disc_freq = 0;
3787                 return;
3788         }
3789
3790         if (freq != p2p->pending_listen_freq) {
3791                 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3792                         freq, duration, p2p->pending_listen_freq);
3793                 return;
3794         }
3795
3796         p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3797                 p2p->pending_listen_sec, p2p->pending_listen_usec,
3798                 p2p->pending_listen_freq);
3799         p2p->in_listen = 1;
3800         p2p->drv_in_listen = freq;
3801         if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3802                 /*
3803                  * Add 20 msec extra wait to avoid race condition with driver
3804                  * remain-on-channel end event, i.e., give driver more time to
3805                  * complete the operation before our timeout expires.
3806                  */
3807                 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3808                                 p2p->pending_listen_usec + 20000);
3809         }
3810
3811         p2p->pending_listen_freq = 0;
3812 }
3813
3814
3815 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3816 {
3817         p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3818         p2p->drv_in_listen = 0;
3819         if (p2p->in_listen)
3820                 return 0; /* Internal timeout will trigger the next step */
3821
3822         if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3823                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3824                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3825                         p2p_go_neg_failed(p2p, -1);
3826                         return 0;
3827                 }
3828
3829                 p2p_set_state(p2p, P2P_CONNECT);
3830                 p2p_connect_send(p2p, p2p->go_neg_peer);
3831                 return 1;
3832         } else if (p2p->state == P2P_SEARCH) {
3833                 if (p2p->p2p_scan_running) {
3834                          /*
3835                           * Search is already in progress. This can happen if
3836                           * an Action frame RX is reported immediately after
3837                           * the end of a remain-on-channel operation and the
3838                           * response frame to that is sent using an offchannel
3839                           * operation while in p2p_find. Avoid an attempt to
3840                           * restart a scan here.
3841                           */
3842                         p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3843                         return 1;
3844                 }
3845                 if (p2p->pending_listen_freq) {
3846                         /*
3847                          * Better wait a bit if the driver is unable to start
3848                          * offchannel operation for some reason. p2p_search()
3849                          * will be started from internal timeout.
3850                          */
3851                         p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3852                         p2p_set_timeout(p2p, 0, 100000);
3853                         return 1;
3854                 }
3855                 if (p2p->search_delay) {
3856                         p2p_dbg(p2p, "Delay search operation by %u ms",
3857                                 p2p->search_delay);
3858                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3859                                         (p2p->search_delay % 1000) * 1000);
3860                         return 1;
3861                 }
3862                 p2p_search(p2p);
3863                 return 1;
3864         }
3865
3866         return 0;
3867 }
3868
3869
3870 static void p2p_timeout_connect(struct p2p_data *p2p)
3871 {
3872         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3873         if (p2p->go_neg_peer &&
3874             (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3875                 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3876                 p2p_go_neg_failed(p2p, -1);
3877                 return;
3878         }
3879         if (p2p->go_neg_peer &&
3880             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3881             p2p->go_neg_peer->connect_reqs < 120) {
3882                 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3883                 p2p_connect_send(p2p, p2p->go_neg_peer);
3884                 return;
3885         }
3886         if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3887                 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3888                 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3889                 p2p_set_timeout(p2p, 0, 30000);
3890                 return;
3891         }
3892         p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3893         p2p_listen_in_find(p2p, 0);
3894 }
3895
3896
3897 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3898 {
3899         if (p2p->go_neg_peer) {
3900                 if (p2p->drv_in_listen) {
3901                         p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3902                         return;
3903                 }
3904
3905                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3906                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3907                         p2p_go_neg_failed(p2p, -1);
3908                         return;
3909                 }
3910
3911                 p2p_set_state(p2p, P2P_CONNECT);
3912                 p2p_connect_send(p2p, p2p->go_neg_peer);
3913         } else
3914                 p2p_set_state(p2p, P2P_IDLE);
3915 }
3916
3917
3918 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3919 {
3920         p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3921
3922         if (p2p->cfg->is_concurrent_session_active &&
3923             p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3924                 p2p_set_timeout(p2p, 0, 500000);
3925         else
3926                 p2p_set_timeout(p2p, 0, 200000);
3927 }
3928
3929
3930 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3931 {
3932         struct p2p_device *dev = p2p->go_neg_peer;
3933
3934         if (dev == NULL) {
3935                 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3936                 return;
3937         }
3938
3939         p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3940         p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3941         p2p_listen_in_find(p2p, 0);
3942 }
3943
3944
3945 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3946 {
3947         p2p_dbg(p2p, "Service Discovery Query timeout");
3948         if (p2p->sd_peer) {
3949                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3950                 p2p->sd_peer = NULL;
3951         }
3952         p2p_continue_find(p2p);
3953 }
3954
3955
3956 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3957 {
3958         p2p_dbg(p2p, "Provision Discovery Request timeout");
3959         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3960         p2p_continue_find(p2p);
3961 }
3962
3963
3964 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3965 {
3966         u32 adv_id = 0;
3967         u8 *adv_mac = NULL;
3968
3969         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3970
3971         /*
3972          * For user initiated PD requests that we have not gotten any responses
3973          * for while in IDLE state, we retry them a couple of times before
3974          * giving up.
3975          */
3976         if (!p2p->user_initiated_pd)
3977                 return;
3978
3979         p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3980
3981         if (p2p->pd_retries) {
3982                 p2p->pd_retries--;
3983                 p2p_retry_pd(p2p);
3984         } else {
3985                 struct p2p_device *dev;
3986                 int for_join = 0;
3987
3988                 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3989                         if (os_memcmp(p2p->pending_pd_devaddr,
3990                                       dev->info.p2p_device_addr, ETH_ALEN) != 0)
3991                                 continue;
3992                         if (dev->req_config_methods &&
3993                             (dev->flags & P2P_DEV_PD_FOR_JOIN))
3994                                 for_join = 1;
3995                 }
3996
3997                 if (p2p->p2ps_prov) {
3998                         adv_id = p2p->p2ps_prov->adv_id;
3999                         adv_mac = p2p->p2ps_prov->adv_mac;
4000                 }
4001
4002                 if (p2p->cfg->prov_disc_fail)
4003                         p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
4004                                                  p2p->pending_pd_devaddr,
4005                                                  for_join ?
4006                                                  P2P_PROV_DISC_TIMEOUT_JOIN :
4007                                                  P2P_PROV_DISC_TIMEOUT,
4008                                                  adv_id, adv_mac, NULL);
4009                 p2p_reset_pending_pd(p2p);
4010         }
4011 }
4012
4013
4014 static void p2p_timeout_invite(struct p2p_data *p2p)
4015 {
4016         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
4017         p2p_set_state(p2p, P2P_INVITE_LISTEN);
4018         if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
4019                 /*
4020                  * Better remain on operating channel instead of listen channel
4021                  * when running a group.
4022                  */
4023                 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
4024                 p2p_set_timeout(p2p, 0, 100000);
4025                 return;
4026         }
4027         p2p_listen_in_find(p2p, 0);
4028 }
4029
4030
4031 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
4032 {
4033         if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
4034                 p2p_set_state(p2p, P2P_INVITE);
4035                 p2p_invite_send(p2p, p2p->invite_peer,
4036                                 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
4037         } else {
4038                 if (p2p->invite_peer) {
4039                         p2p_dbg(p2p, "Invitation Request retry limit reached");
4040                         if (p2p->cfg->invitation_result)
4041                                 p2p->cfg->invitation_result(
4042                                         p2p->cfg->cb_ctx, -1, NULL, NULL,
4043                                         p2p->invite_peer->info.p2p_device_addr,
4044                                         0, 0);
4045                 }
4046                 p2p_set_state(p2p, P2P_IDLE);
4047         }
4048 }
4049
4050
4051 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
4052 {
4053         struct p2p_data *p2p = eloop_ctx;
4054
4055         p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
4056
4057         p2p->in_listen = 0;
4058         if (p2p->drv_in_listen) {
4059                 p2p_dbg(p2p, "Driver is still in listen state - stop it");
4060                 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
4061         }
4062
4063         switch (p2p->state) {
4064         case P2P_IDLE:
4065                 /* Check if we timed out waiting for PD req */
4066                 if (p2p->pending_action_state == P2P_PENDING_PD)
4067                         p2p_timeout_prov_disc_req(p2p);
4068                 break;
4069         case P2P_SEARCH:
4070                 /* Check if we timed out waiting for PD req */
4071                 if (p2p->pending_action_state == P2P_PENDING_PD)
4072                         p2p_timeout_prov_disc_req(p2p);
4073                 if (p2p->search_delay && !p2p->in_search_delay) {
4074                         p2p_dbg(p2p, "Delay search operation by %u ms",
4075                                 p2p->search_delay);
4076                         p2p->in_search_delay = 1;
4077                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
4078                                         (p2p->search_delay % 1000) * 1000);
4079                         break;
4080                 }
4081                 p2p->in_search_delay = 0;
4082                 p2p_search(p2p);
4083                 break;
4084         case P2P_CONNECT:
4085                 p2p_timeout_connect(p2p);
4086                 break;
4087         case P2P_CONNECT_LISTEN:
4088                 p2p_timeout_connect_listen(p2p);
4089                 break;
4090         case P2P_GO_NEG:
4091                 break;
4092         case P2P_LISTEN_ONLY:
4093                 /* Check if we timed out waiting for PD req */
4094                 if (p2p->pending_action_state == P2P_PENDING_PD)
4095                         p2p_timeout_prov_disc_req(p2p);
4096
4097                 if (p2p->ext_listen_only) {
4098                         p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
4099                         p2p->ext_listen_only = 0;
4100                         p2p_set_state(p2p, P2P_IDLE);
4101                 }
4102                 break;
4103         case P2P_WAIT_PEER_CONNECT:
4104                 p2p_timeout_wait_peer_connect(p2p);
4105                 break;
4106         case P2P_WAIT_PEER_IDLE:
4107                 p2p_timeout_wait_peer_idle(p2p);
4108                 break;
4109         case P2P_SD_DURING_FIND:
4110                 p2p_timeout_sd_during_find(p2p);
4111                 break;
4112         case P2P_PROVISIONING:
4113                 break;
4114         case P2P_PD_DURING_FIND:
4115                 p2p_timeout_prov_disc_during_find(p2p);
4116                 break;
4117         case P2P_INVITE:
4118                 p2p_timeout_invite(p2p);
4119                 break;
4120         case P2P_INVITE_LISTEN:
4121                 p2p_timeout_invite_listen(p2p);
4122                 break;
4123         }
4124 }
4125
4126
4127 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
4128 {
4129         struct p2p_device *dev;
4130
4131         dev = p2p_get_device(p2p, peer_addr);
4132         p2p_dbg(p2p, "Local request to reject connection attempts by peer "
4133                 MACSTR, MAC2STR(peer_addr));
4134         if (dev == NULL) {
4135                 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
4136                 return -1;
4137         }
4138         dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
4139         dev->flags |= P2P_DEV_USER_REJECTED;
4140         return 0;
4141 }
4142
4143
4144 const char * p2p_wps_method_text(enum p2p_wps_method method)
4145 {
4146         switch (method) {
4147         case WPS_NOT_READY:
4148                 return "not-ready";
4149         case WPS_PIN_DISPLAY:
4150                 return "Display";
4151         case WPS_PIN_KEYPAD:
4152                 return "Keypad";
4153         case WPS_PBC:
4154                 return "PBC";
4155         case WPS_NFC:
4156                 return "NFC";
4157         case WPS_P2PS:
4158                 return "P2PS";
4159         }
4160
4161         return "??";
4162 }
4163
4164
4165 static const char * p2p_go_state_text(enum p2p_go_state go_state)
4166 {
4167         switch (go_state) {
4168         case UNKNOWN_GO:
4169                 return "unknown";
4170         case LOCAL_GO:
4171                 return "local";
4172         case  REMOTE_GO:
4173                 return "remote";
4174         }
4175
4176         return "??";
4177 }
4178
4179
4180 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
4181                                                const u8 *addr, int next)
4182 {
4183         struct p2p_device *dev;
4184
4185         if (addr)
4186                 dev = p2p_get_device(p2p, addr);
4187         else
4188                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4189
4190         if (dev && next) {
4191                 dev = dl_list_first(&dev->list, struct p2p_device, list);
4192                 if (&dev->list == &p2p->devices)
4193                         dev = NULL;
4194         }
4195
4196         if (dev == NULL)
4197                 return NULL;
4198
4199         return &dev->info;
4200 }
4201
4202
4203 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
4204                           char *buf, size_t buflen)
4205 {
4206         struct p2p_device *dev;
4207         int res;
4208         char *pos, *end;
4209         struct os_reltime now;
4210
4211         if (info == NULL)
4212                 return -1;
4213
4214         dev = (struct p2p_device *) (((u8 *) info) -
4215                                      offsetof(struct p2p_device, info));
4216
4217         pos = buf;
4218         end = buf + buflen;
4219
4220         os_get_reltime(&now);
4221         res = os_snprintf(pos, end - pos,
4222                           "age=%d\n"
4223                           "listen_freq=%d\n"
4224                           "wps_method=%s\n"
4225                           "interface_addr=" MACSTR "\n"
4226                           "member_in_go_dev=" MACSTR "\n"
4227                           "member_in_go_iface=" MACSTR "\n"
4228                           "go_neg_req_sent=%d\n"
4229                           "go_state=%s\n"
4230                           "dialog_token=%u\n"
4231                           "intended_addr=" MACSTR "\n"
4232                           "country=%c%c\n"
4233                           "oper_freq=%d\n"
4234                           "req_config_methods=0x%x\n"
4235                           "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
4236                           "status=%d\n"
4237                           "invitation_reqs=%u\n",
4238                           (int) (now.sec - dev->last_seen.sec),
4239                           dev->listen_freq,
4240                           p2p_wps_method_text(dev->wps_method),
4241                           MAC2STR(dev->interface_addr),
4242                           MAC2STR(dev->member_in_go_dev),
4243                           MAC2STR(dev->member_in_go_iface),
4244                           dev->go_neg_req_sent,
4245                           p2p_go_state_text(dev->go_state),
4246                           dev->dialog_token,
4247                           MAC2STR(dev->intended_addr),
4248                           dev->country[0] ? dev->country[0] : '_',
4249                           dev->country[1] ? dev->country[1] : '_',
4250                           dev->oper_freq,
4251                           dev->req_config_methods,
4252                           dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
4253                           "[PROBE_REQ_ONLY]" : "",
4254                           dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
4255                           dev->flags & P2P_DEV_NOT_YET_READY ?
4256                           "[NOT_YET_READY]" : "",
4257                           dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
4258                           "[PD_PEER_DISPLAY]" : "",
4259                           dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
4260                           "[PD_PEER_KEYPAD]" : "",
4261                           dev->flags & P2P_DEV_PD_PEER_P2PS ?
4262                           "[PD_PEER_P2PS]" : "",
4263                           dev->flags & P2P_DEV_USER_REJECTED ?
4264                           "[USER_REJECTED]" : "",
4265                           dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
4266                           "[PEER_WAITING_RESPONSE]" : "",
4267                           dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
4268                           "[PREFER_PERSISTENT_GROUP]" : "",
4269                           dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
4270                           "[WAIT_GO_NEG_RESPONSE]" : "",
4271                           dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
4272                           "[WAIT_GO_NEG_CONFIRM]" : "",
4273                           dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
4274                           "[GROUP_CLIENT_ONLY]" : "",
4275                           dev->flags & P2P_DEV_FORCE_FREQ ?
4276                           "[FORCE_FREQ]" : "",
4277                           dev->flags & P2P_DEV_PD_FOR_JOIN ?
4278                           "[PD_FOR_JOIN]" : "",
4279                           dev->flags & P2P_DEV_LAST_SEEN_AS_GROUP_CLIENT ?
4280                           "[LAST_SEEN_AS_GROUP_CLIENT]" : "",
4281                           dev->status,
4282                           dev->invitation_reqs);
4283         if (os_snprintf_error(end - pos, res))
4284                 return pos - buf;
4285         pos += res;
4286
4287         if (dev->ext_listen_period) {
4288                 res = os_snprintf(pos, end - pos,
4289                                   "ext_listen_period=%u\n"
4290                                   "ext_listen_interval=%u\n",
4291                                   dev->ext_listen_period,
4292                                   dev->ext_listen_interval);
4293                 if (os_snprintf_error(end - pos, res))
4294                         return pos - buf;
4295                 pos += res;
4296         }
4297
4298         if (dev->oper_ssid_len) {
4299                 res = os_snprintf(pos, end - pos,
4300                                   "oper_ssid=%s\n",
4301                                   wpa_ssid_txt(dev->oper_ssid,
4302                                                dev->oper_ssid_len));
4303                 if (os_snprintf_error(end - pos, res))
4304                         return pos - buf;
4305                 pos += res;
4306         }
4307
4308 #ifdef CONFIG_WIFI_DISPLAY
4309         if (dev->info.wfd_subelems) {
4310                 res = os_snprintf(pos, end - pos, "wfd_subelems=");
4311                 if (os_snprintf_error(end - pos, res))
4312                         return pos - buf;
4313                 pos += res;
4314
4315                 pos += wpa_snprintf_hex(pos, end - pos,
4316                                         wpabuf_head(dev->info.wfd_subelems),
4317                                         wpabuf_len(dev->info.wfd_subelems));
4318
4319                 res = os_snprintf(pos, end - pos, "\n");
4320                 if (os_snprintf_error(end - pos, res))
4321                         return pos - buf;
4322                 pos += res;
4323         }
4324 #endif /* CONFIG_WIFI_DISPLAY */
4325
4326         return pos - buf;
4327 }
4328
4329
4330 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
4331 {
4332         return p2p_get_device(p2p, addr) != NULL;
4333 }
4334
4335
4336 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
4337 {
4338         if (enabled) {
4339                 p2p_dbg(p2p, "Client discoverability enabled");
4340                 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4341         } else {
4342                 p2p_dbg(p2p, "Client discoverability disabled");
4343                 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4344         }
4345 }
4346
4347
4348 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
4349                                               u32 duration2, u32 interval2)
4350 {
4351         struct wpabuf *req;
4352         struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
4353         u8 *len;
4354
4355         req = wpabuf_alloc(100);
4356         if (req == NULL)
4357                 return NULL;
4358
4359         if (duration1 || interval1) {
4360                 os_memset(&desc1, 0, sizeof(desc1));
4361                 desc1.count_type = 1;
4362                 desc1.duration = duration1;
4363                 desc1.interval = interval1;
4364                 ptr1 = &desc1;
4365
4366                 if (duration2 || interval2) {
4367                         os_memset(&desc2, 0, sizeof(desc2));
4368                         desc2.count_type = 2;
4369                         desc2.duration = duration2;
4370                         desc2.interval = interval2;
4371                         ptr2 = &desc2;
4372                 }
4373         }
4374
4375         p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
4376         len = p2p_buf_add_ie_hdr(req);
4377         p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
4378         p2p_buf_update_ie_hdr(req, len);
4379
4380         return req;
4381 }
4382
4383
4384 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
4385                      const u8 *own_interface_addr, unsigned int freq,
4386                      u32 duration1, u32 interval1, u32 duration2,
4387                      u32 interval2)
4388 {
4389         struct wpabuf *req;
4390
4391         p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
4392                 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
4393                 "dur2=%u int2=%u",
4394                 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
4395                 freq, duration1, interval1, duration2, interval2);
4396
4397         req = p2p_build_presence_req(duration1, interval1, duration2,
4398                                      interval2);
4399         if (req == NULL)
4400                 return -1;
4401
4402         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4403         if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
4404                             go_interface_addr,
4405                             wpabuf_head(req), wpabuf_len(req), 200) < 0) {
4406                 p2p_dbg(p2p, "Failed to send Action frame");
4407         }
4408         wpabuf_free(req);
4409
4410         return 0;
4411 }
4412
4413
4414 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
4415                                                size_t noa_len, u8 dialog_token)
4416 {
4417         struct wpabuf *resp;
4418         u8 *len;
4419
4420         resp = wpabuf_alloc(100 + noa_len);
4421         if (resp == NULL)
4422                 return NULL;
4423
4424         p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
4425         len = p2p_buf_add_ie_hdr(resp);
4426         p2p_buf_add_status(resp, status);
4427         if (noa) {
4428                 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
4429                 wpabuf_put_le16(resp, noa_len);
4430                 wpabuf_put_data(resp, noa, noa_len);
4431         } else
4432                 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
4433         p2p_buf_update_ie_hdr(resp, len);
4434
4435         return resp;
4436 }
4437
4438
4439 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
4440                                      const u8 *sa, const u8 *data, size_t len,
4441                                      int rx_freq)
4442 {
4443         struct p2p_message msg;
4444         u8 status;
4445         struct wpabuf *resp;
4446         size_t g;
4447         struct p2p_group *group = NULL;
4448         int parsed = 0;
4449         u8 noa[50];
4450         int noa_len;
4451
4452         p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
4453
4454         for (g = 0; g < p2p->num_groups; g++) {
4455                 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
4456                               ETH_ALEN) == 0) {
4457                         group = p2p->groups[g];
4458                         break;
4459                 }
4460         }
4461         if (group == NULL) {
4462                 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
4463                         MACSTR, MAC2STR(da));
4464                 return;
4465         }
4466
4467         if (p2p_parse(data, len, &msg) < 0) {
4468                 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
4469                 status = P2P_SC_FAIL_INVALID_PARAMS;
4470                 goto fail;
4471         }
4472         parsed = 1;
4473
4474         if (msg.noa == NULL) {
4475                 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
4476                 status = P2P_SC_FAIL_INVALID_PARAMS;
4477                 goto fail;
4478         }
4479
4480         status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
4481
4482 fail:
4483         if (p2p->cfg->get_noa)
4484                 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
4485                                             sizeof(noa));
4486         else
4487                 noa_len = -1;
4488         resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
4489                                        noa_len > 0 ? noa_len : 0,
4490                                        msg.dialog_token);
4491         if (parsed)
4492                 p2p_parse_free(&msg);
4493         if (resp == NULL)
4494                 return;
4495
4496         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4497         if (p2p_send_action(p2p, rx_freq, sa, da, da,
4498                             wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
4499                 p2p_dbg(p2p, "Failed to send Action frame");
4500         }
4501         wpabuf_free(resp);
4502 }
4503
4504
4505 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
4506                                       const u8 *sa, const u8 *data, size_t len)
4507 {
4508         struct p2p_message msg;
4509
4510         p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
4511
4512         if (p2p_parse(data, len, &msg) < 0) {
4513                 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
4514                 return;
4515         }
4516
4517         if (msg.status == NULL || msg.noa == NULL) {
4518                 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
4519                 p2p_parse_free(&msg);
4520                 return;
4521         }
4522
4523         if (p2p->cfg->presence_resp) {
4524                 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
4525                                         msg.noa, msg.noa_len);
4526         }
4527
4528         if (*msg.status) {
4529                 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
4530                         *msg.status);
4531                 p2p_parse_free(&msg);
4532                 return;
4533         }
4534
4535         p2p_dbg(p2p, "P2P Presence Request was accepted");
4536         wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
4537                     msg.noa, msg.noa_len);
4538         /* TODO: process NoA */
4539         p2p_parse_free(&msg);
4540 }
4541
4542
4543 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
4544 {
4545         struct p2p_data *p2p = eloop_ctx;
4546
4547         if (p2p->ext_listen_interval) {
4548                 /* Schedule next extended listen timeout */
4549                 eloop_register_timeout(p2p->ext_listen_interval_sec,
4550                                        p2p->ext_listen_interval_usec,
4551                                        p2p_ext_listen_timeout, p2p, NULL);
4552         }
4553
4554         if ((p2p->cfg->is_p2p_in_progress &&
4555              p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
4556             (p2p->pending_action_state == P2P_PENDING_PD &&
4557              p2p->pd_retries > 0)) {
4558                 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
4559                         p2p_state_txt(p2p->state));
4560                 return;
4561         }
4562
4563         if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
4564                 /*
4565                  * This should not really happen, but it looks like the Listen
4566                  * command may fail is something else (e.g., a scan) was
4567                  * running at an inconvenient time. As a workaround, allow new
4568                  * Extended Listen operation to be started.
4569                  */
4570                 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
4571                 p2p->ext_listen_only = 0;
4572                 p2p_set_state(p2p, P2P_IDLE);
4573         }
4574
4575         if (p2p->state != P2P_IDLE) {
4576                 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
4577                 return;
4578         }
4579
4580         p2p_dbg(p2p, "Extended Listen timeout");
4581         p2p->ext_listen_only = 1;
4582         if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
4583                 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
4584                 p2p->ext_listen_only = 0;
4585         }
4586 }
4587
4588
4589 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
4590                    unsigned int interval)
4591 {
4592         if (period > 65535 || interval > 65535 || period > interval ||
4593             (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
4594                 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
4595                         period, interval);
4596                 return -1;
4597         }
4598
4599         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
4600
4601         if (interval == 0) {
4602                 p2p_dbg(p2p, "Disabling Extended Listen Timing");
4603                 p2p->ext_listen_period = 0;
4604                 p2p->ext_listen_interval = 0;
4605                 return 0;
4606         }
4607
4608         p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
4609                 period, interval);
4610         p2p->ext_listen_period = period;
4611         p2p->ext_listen_interval = interval;
4612         p2p->ext_listen_interval_sec = interval / 1000;
4613         p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
4614
4615         eloop_register_timeout(p2p->ext_listen_interval_sec,
4616                                p2p->ext_listen_interval_usec,
4617                                p2p_ext_listen_timeout, p2p, NULL);
4618
4619         return 0;
4620 }
4621
4622
4623 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4624                       const u8 *ie, size_t ie_len)
4625 {
4626         struct p2p_message msg;
4627
4628         if (bssid == NULL || ie == NULL)
4629                 return;
4630
4631         os_memset(&msg, 0, sizeof(msg));
4632         if (p2p_parse_ies(ie, ie_len, &msg))
4633                 return;
4634         if (msg.minor_reason_code == NULL) {
4635                 p2p_parse_free(&msg);
4636                 return;
4637         }
4638
4639         p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
4640                 " reason_code=%u minor_reason_code=%u",
4641                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4642
4643         p2p_parse_free(&msg);
4644 }
4645
4646
4647 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4648                         const u8 *ie, size_t ie_len)
4649 {
4650         struct p2p_message msg;
4651
4652         if (bssid == NULL || ie == NULL)
4653                 return;
4654
4655         os_memset(&msg, 0, sizeof(msg));
4656         if (p2p_parse_ies(ie, ie_len, &msg))
4657                 return;
4658         if (msg.minor_reason_code == NULL) {
4659                 p2p_parse_free(&msg);
4660                 return;
4661         }
4662
4663         p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
4664                 " reason_code=%u minor_reason_code=%u",
4665                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4666
4667         p2p_parse_free(&msg);
4668 }
4669
4670
4671 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
4672 {
4673         if (enabled) {
4674                 p2p_dbg(p2p, "Managed P2P Device operations enabled");
4675                 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
4676         } else {
4677                 p2p_dbg(p2p, "Managed P2P Device operations disabled");
4678                 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
4679         }
4680 }
4681
4682
4683 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class,
4684                                  u8 *op_channel)
4685 {
4686         return p2p_channel_random_social(&p2p->channels, op_class, op_channel);
4687 }
4688
4689
4690 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
4691                            u8 forced)
4692 {
4693         if (p2p_channel_to_freq(reg_class, channel) < 0)
4694                 return -1;
4695
4696         /*
4697          * Listen channel was set in configuration or set by control interface;
4698          * cannot override it.
4699          */
4700         if (p2p->cfg->channel_forced && forced == 0) {
4701                 p2p_dbg(p2p,
4702                         "Listen channel was previously configured - do not override based on optimization");
4703                 return -1;
4704         }
4705
4706         p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
4707                 reg_class, channel);
4708
4709         if (p2p->state == P2P_IDLE) {
4710                 p2p->cfg->reg_class = reg_class;
4711                 p2p->cfg->channel = channel;
4712                 p2p->cfg->channel_forced = forced;
4713         } else {
4714                 p2p_dbg(p2p, "Defer setting listen channel");
4715                 p2p->pending_reg_class = reg_class;
4716                 p2p->pending_channel = channel;
4717                 p2p->pending_channel_forced = forced;
4718         }
4719
4720         return 0;
4721 }
4722
4723
4724 u8 p2p_get_listen_channel(struct p2p_data *p2p)
4725 {
4726         return p2p->cfg->channel;
4727 }
4728
4729
4730 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
4731 {
4732         p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
4733         if (postfix == NULL) {
4734                 p2p->cfg->ssid_postfix_len = 0;
4735                 return 0;
4736         }
4737         if (len > sizeof(p2p->cfg->ssid_postfix))
4738                 return -1;
4739         os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
4740         p2p->cfg->ssid_postfix_len = len;
4741         return 0;
4742 }
4743
4744
4745 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
4746                          int cfg_op_channel)
4747 {
4748         if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
4749                 return -1;
4750
4751         p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
4752                 op_reg_class, op_channel);
4753         p2p->cfg->op_reg_class = op_reg_class;
4754         p2p->cfg->op_channel = op_channel;
4755         p2p->cfg->cfg_op_channel = cfg_op_channel;
4756         return 0;
4757 }
4758
4759
4760 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
4761                       const struct p2p_channel *pref_chan)
4762 {
4763         struct p2p_channel *n;
4764
4765         if (pref_chan) {
4766                 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
4767                 if (n == NULL)
4768                         return -1;
4769                 os_memcpy(n, pref_chan,
4770                           num_pref_chan * sizeof(struct p2p_channel));
4771         } else
4772                 n = NULL;
4773
4774         os_free(p2p->cfg->pref_chan);
4775         p2p->cfg->pref_chan = n;
4776         p2p->cfg->num_pref_chan = num_pref_chan;
4777
4778         return 0;
4779 }
4780
4781
4782 int p2p_set_no_go_freq(struct p2p_data *p2p,
4783                        const struct wpa_freq_range_list *list)
4784 {
4785         struct wpa_freq_range *tmp;
4786
4787         if (list == NULL || list->num == 0) {
4788                 os_free(p2p->no_go_freq.range);
4789                 p2p->no_go_freq.range = NULL;
4790                 p2p->no_go_freq.num = 0;
4791                 return 0;
4792         }
4793
4794         tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4795         if (tmp == NULL)
4796                 return -1;
4797         os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4798         os_free(p2p->no_go_freq.range);
4799         p2p->no_go_freq.range = tmp;
4800         p2p->no_go_freq.num = list->num;
4801         p2p_dbg(p2p, "Updated no GO chan list");
4802
4803         return 0;
4804 }
4805
4806
4807 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4808                            u8 *iface_addr)
4809 {
4810         struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4811         if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4812                 return -1;
4813         os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4814         return 0;
4815 }
4816
4817
4818 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4819                            u8 *dev_addr)
4820 {
4821         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4822         if (dev == NULL)
4823                 return -1;
4824         os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4825         return 0;
4826 }
4827
4828
4829 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4830 {
4831         os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4832         if (is_zero_ether_addr(p2p->peer_filter))
4833                 p2p_dbg(p2p, "Disable peer filter");
4834         else
4835                 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4836                         MAC2STR(p2p->peer_filter));
4837 }
4838
4839
4840 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4841 {
4842         p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4843         if (p2p->cross_connect == enabled)
4844                 return;
4845         p2p->cross_connect = enabled;
4846         /* TODO: may need to tear down any action group where we are GO(?) */
4847 }
4848
4849
4850 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4851 {
4852         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4853         if (dev == NULL)
4854                 return -1;
4855         if (dev->oper_freq <= 0)
4856                 return -1;
4857         return dev->oper_freq;
4858 }
4859
4860
4861 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4862 {
4863         p2p_dbg(p2p, "Intra BSS distribution %s",
4864                 enabled ? "enabled" : "disabled");
4865         p2p->cfg->p2p_intra_bss = enabled;
4866 }
4867
4868
4869 void p2p_update_channel_list(struct p2p_data *p2p,
4870                              const struct p2p_channels *chan,
4871                              const struct p2p_channels *cli_chan)
4872 {
4873         p2p_dbg(p2p, "Update channel list");
4874         os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4875         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4876         os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4877                   sizeof(struct p2p_channels));
4878         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4879 }
4880
4881
4882 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4883                     const u8 *src, const u8 *bssid, const u8 *buf,
4884                     size_t len, unsigned int wait_time)
4885 {
4886         if (p2p->p2p_scan_running) {
4887                 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4888                 if (p2p->after_scan_tx) {
4889                         p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4890                         os_free(p2p->after_scan_tx);
4891                 }
4892                 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4893                                                len);
4894                 if (p2p->after_scan_tx == NULL)
4895                         return -1;
4896                 p2p->after_scan_tx->freq = freq;
4897                 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4898                 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4899                 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4900                 p2p->after_scan_tx->len = len;
4901                 p2p->after_scan_tx->wait_time = wait_time;
4902                 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4903                 return 0;
4904         }
4905
4906         return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4907                                      buf, len, wait_time);
4908 }
4909
4910
4911 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4912                            int freq_overall)
4913 {
4914         p2p_dbg(p2p, "Best channel: 2.4 GHz: %d,  5 GHz: %d,  overall: %d",
4915                 freq_24, freq_5, freq_overall);
4916         p2p->best_freq_24 = freq_24;
4917         p2p->best_freq_5 = freq_5;
4918         p2p->best_freq_overall = freq_overall;
4919 }
4920
4921
4922 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4923 {
4924         p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4925         p2p->own_freq_preference = freq;
4926 }
4927
4928
4929 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4930 {
4931         if (p2p == NULL || p2p->go_neg_peer == NULL)
4932                 return NULL;
4933         return p2p->go_neg_peer->info.p2p_device_addr;
4934 }
4935
4936
4937 const struct p2p_peer_info *
4938 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4939 {
4940         struct p2p_device *dev;
4941
4942         if (addr) {
4943                 dev = p2p_get_device(p2p, addr);
4944                 if (!dev)
4945                         return NULL;
4946
4947                 if (!next) {
4948                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4949                                 return NULL;
4950
4951                         return &dev->info;
4952                 } else {
4953                         do {
4954                                 dev = dl_list_first(&dev->list,
4955                                                     struct p2p_device,
4956                                                     list);
4957                                 if (!dev || &dev->list == &p2p->devices)
4958                                         return NULL;
4959                         } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4960                 }
4961         } else {
4962                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4963                 if (!dev)
4964                         return NULL;
4965                 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4966                         dev = dl_list_first(&dev->list,
4967                                             struct p2p_device,
4968                                             list);
4969                         if (!dev || &dev->list == &p2p->devices)
4970                                 return NULL;
4971                 }
4972         }
4973
4974         return &dev->info;
4975 }
4976
4977
4978 int p2p_in_progress(struct p2p_data *p2p)
4979 {
4980         if (p2p == NULL)
4981                 return 0;
4982         if (p2p->state == P2P_SEARCH)
4983                 return 2;
4984         return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4985 }
4986
4987
4988 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4989                             u8 client_timeout)
4990 {
4991         if (p2p) {
4992                 p2p->go_timeout = go_timeout;
4993                 p2p->client_timeout = client_timeout;
4994         }
4995 }
4996
4997
4998 #ifdef CONFIG_WIFI_DISPLAY
4999
5000 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
5001 {
5002         size_t g;
5003         struct p2p_group *group;
5004
5005         for (g = 0; g < p2p->num_groups; g++) {
5006                 group = p2p->groups[g];
5007                 p2p_group_force_beacon_update_ies(group);
5008         }
5009 }
5010
5011
5012 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
5013 {
5014         wpabuf_free(p2p->wfd_ie_beacon);
5015         p2p->wfd_ie_beacon = ie;
5016         p2p_update_wfd_ie_groups(p2p);
5017         return 0;
5018 }
5019
5020
5021 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
5022 {
5023         wpabuf_free(p2p->wfd_ie_probe_req);
5024         p2p->wfd_ie_probe_req = ie;
5025         return 0;
5026 }
5027
5028
5029 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
5030 {
5031         wpabuf_free(p2p->wfd_ie_probe_resp);
5032         p2p->wfd_ie_probe_resp = ie;
5033         p2p_update_wfd_ie_groups(p2p);
5034         return 0;
5035 }
5036
5037
5038 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
5039 {
5040         wpabuf_free(p2p->wfd_ie_assoc_req);
5041         p2p->wfd_ie_assoc_req = ie;
5042         return 0;
5043 }
5044
5045
5046 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
5047 {
5048         wpabuf_free(p2p->wfd_ie_invitation);
5049         p2p->wfd_ie_invitation = ie;
5050         return 0;
5051 }
5052
5053
5054 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
5055 {
5056         wpabuf_free(p2p->wfd_ie_prov_disc_req);
5057         p2p->wfd_ie_prov_disc_req = ie;
5058         return 0;
5059 }
5060
5061
5062 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
5063 {
5064         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
5065         p2p->wfd_ie_prov_disc_resp = ie;
5066         return 0;
5067 }
5068
5069
5070 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
5071 {
5072         wpabuf_free(p2p->wfd_ie_go_neg);
5073         p2p->wfd_ie_go_neg = ie;
5074         return 0;
5075 }
5076
5077
5078 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
5079 {
5080         wpabuf_free(p2p->wfd_dev_info);
5081         if (elem) {
5082                 p2p->wfd_dev_info = wpabuf_dup(elem);
5083                 if (p2p->wfd_dev_info == NULL)
5084                         return -1;
5085         } else
5086                 p2p->wfd_dev_info = NULL;
5087
5088         return 0;
5089 }
5090
5091
5092 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
5093 {
5094         wpabuf_free(p2p->wfd_assoc_bssid);
5095         if (elem) {
5096                 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
5097                 if (p2p->wfd_assoc_bssid == NULL)
5098                         return -1;
5099         } else
5100                 p2p->wfd_assoc_bssid = NULL;
5101
5102         return 0;
5103 }
5104
5105
5106 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
5107                                   const struct wpabuf *elem)
5108 {
5109         wpabuf_free(p2p->wfd_coupled_sink_info);
5110         if (elem) {
5111                 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
5112                 if (p2p->wfd_coupled_sink_info == NULL)
5113                         return -1;
5114         } else
5115                 p2p->wfd_coupled_sink_info = NULL;
5116
5117         return 0;
5118 }
5119
5120 #endif /* CONFIG_WIFI_DISPLAY */
5121
5122
5123 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
5124                      int max_disc_tu)
5125 {
5126         if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
5127                 return -1;
5128
5129         p2p->min_disc_int = min_disc_int;
5130         p2p->max_disc_int = max_disc_int;
5131         p2p->max_disc_tu = max_disc_tu;
5132         p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
5133                 min_disc_int, max_disc_int, max_disc_tu);
5134
5135         return 0;
5136 }
5137
5138
5139 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
5140 {
5141         va_list ap;
5142         char buf[500];
5143
5144         if (!p2p->cfg->debug_print)
5145                 return;
5146
5147         va_start(ap, fmt);
5148         vsnprintf(buf, sizeof(buf), fmt, ap);
5149         buf[sizeof(buf) - 1] = '\0';
5150         va_end(ap);
5151         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
5152 }
5153
5154
5155 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
5156 {
5157         va_list ap;
5158         char buf[500];
5159
5160         if (!p2p->cfg->debug_print)
5161                 return;
5162
5163         va_start(ap, fmt);
5164         vsnprintf(buf, sizeof(buf), fmt, ap);
5165         buf[sizeof(buf) - 1] = '\0';
5166         va_end(ap);
5167         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
5168 }
5169
5170
5171 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
5172 {
5173         va_list ap;
5174         char buf[500];
5175
5176         if (!p2p->cfg->debug_print)
5177                 return;
5178
5179         va_start(ap, fmt);
5180         vsnprintf(buf, sizeof(buf), fmt, ap);
5181         buf[sizeof(buf) - 1] = '\0';
5182         va_end(ap);
5183         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
5184 }
5185
5186
5187 void p2p_loop_on_known_peers(struct p2p_data *p2p,
5188                              void (*peer_callback)(struct p2p_peer_info *peer,
5189                                                    void *user_data),
5190                              void *user_data)
5191 {
5192         struct p2p_device *dev, *n;
5193
5194         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
5195                 peer_callback(&dev->info, user_data);
5196         }
5197 }
5198
5199
5200 #ifdef CONFIG_WPS_NFC
5201
5202 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
5203                                               int client_freq,
5204                                               const u8 *go_dev_addr,
5205                                               const u8 *ssid, size_t ssid_len)
5206 {
5207         struct wpabuf *buf;
5208         u8 op_class, channel;
5209         enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
5210
5211         buf = wpabuf_alloc(1000);
5212         if (buf == NULL)
5213                 return NULL;
5214
5215         op_class = p2p->cfg->reg_class;
5216         channel = p2p->cfg->channel;
5217
5218         p2p_buf_add_capability(buf, p2p->dev_capab &
5219                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
5220         p2p_buf_add_device_info(buf, p2p, NULL);
5221
5222         if (p2p->num_groups > 0) {
5223                 int freq = p2p_group_get_freq(p2p->groups[0]);
5224                 role = P2P_GO_IN_A_GROUP;
5225                 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
5226                         p2p_dbg(p2p,
5227                                 "Unknown GO operating frequency %d MHz for NFC handover",
5228                                 freq);
5229                         wpabuf_free(buf);
5230                         return NULL;
5231                 }
5232         } else if (client_freq > 0) {
5233                 role = P2P_CLIENT_IN_A_GROUP;
5234                 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
5235                         p2p_dbg(p2p,
5236                                 "Unknown client operating frequency %d MHz for NFC handover",
5237                                 client_freq);
5238                         wpabuf_free(buf);
5239                         return NULL;
5240                 }
5241         }
5242
5243         p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
5244                                        channel, role);
5245
5246         if (p2p->num_groups > 0) {
5247                 /* Limit number of clients to avoid very long message */
5248                 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
5249                 p2p_group_buf_add_id(p2p->groups[0], buf);
5250         } else if (client_freq > 0 &&
5251                    go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
5252                    ssid && ssid_len > 0) {
5253                 /*
5254                  * Add the optional P2P Group ID to indicate in which group this
5255                  * device is a P2P Client.
5256                  */
5257                 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
5258         }
5259
5260         return buf;
5261 }
5262
5263
5264 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
5265                                            int client_freq,
5266                                            const u8 *go_dev_addr,
5267                                            const u8 *ssid, size_t ssid_len)
5268 {
5269         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5270                                       ssid_len);
5271 }
5272
5273
5274 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
5275                                            int client_freq,
5276                                            const u8 *go_dev_addr,
5277                                            const u8 *ssid, size_t ssid_len)
5278 {
5279         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5280                                       ssid_len);
5281 }
5282
5283
5284 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
5285                                         struct p2p_nfc_params *params)
5286 {
5287         struct p2p_message msg;
5288         struct p2p_device *dev;
5289         const u8 *p2p_dev_addr;
5290         int freq;
5291         enum p2p_role_indication role;
5292
5293         params->next_step = NO_ACTION;
5294
5295         if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
5296                                    params->p2p_attr, params->p2p_len, &msg)) {
5297                 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
5298                 p2p_parse_free(&msg);
5299                 return -1;
5300         }
5301
5302         if (msg.p2p_device_addr)
5303                 p2p_dev_addr = msg.p2p_device_addr;
5304         else if (msg.device_id)
5305                 p2p_dev_addr = msg.device_id;
5306         else {
5307                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
5308                 p2p_parse_free(&msg);
5309                 return -1;
5310         }
5311
5312         if (msg.oob_dev_password) {
5313                 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
5314                           msg.oob_dev_password_len);
5315                 params->oob_dev_pw_len = msg.oob_dev_password_len;
5316         }
5317
5318         dev = p2p_create_device(p2p, p2p_dev_addr);
5319         if (dev == NULL) {
5320                 p2p_parse_free(&msg);
5321                 return -1;
5322         }
5323
5324         params->peer = &dev->info;
5325
5326         os_get_reltime(&dev->last_seen);
5327         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
5328         p2p_copy_wps_info(p2p, dev, 0, &msg);
5329
5330         if (!msg.oob_go_neg_channel) {
5331                 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
5332                 p2p_parse_free(&msg);
5333                 return -1;
5334         }
5335
5336         if (msg.oob_go_neg_channel[3] == 0 &&
5337             msg.oob_go_neg_channel[4] == 0)
5338                 freq = 0;
5339         else
5340                 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
5341                                            msg.oob_go_neg_channel[4]);
5342         if (freq < 0) {
5343                 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
5344                 p2p_parse_free(&msg);
5345                 return -1;
5346         }
5347         role = msg.oob_go_neg_channel[5];
5348
5349         if (role == P2P_GO_IN_A_GROUP) {
5350                 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
5351                 params->go_freq = freq;
5352         } else if (role == P2P_CLIENT_IN_A_GROUP) {
5353                 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
5354                         freq);
5355                 params->go_freq = freq;
5356         } else
5357                 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
5358         dev->oob_go_neg_freq = freq;
5359
5360         if (!params->sel && role != P2P_GO_IN_A_GROUP) {
5361                 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
5362                                            p2p->cfg->channel);
5363                 if (freq < 0) {
5364                         p2p_dbg(p2p, "Own listen channel not known");
5365                         p2p_parse_free(&msg);
5366                         return -1;
5367                 }
5368                 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
5369                 dev->oob_go_neg_freq = freq;
5370         }
5371
5372         if (msg.group_id) {
5373                 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
5374                 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
5375                 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
5376                           params->go_ssid_len);
5377         }
5378
5379         if (dev->flags & P2P_DEV_USER_REJECTED) {
5380                 p2p_dbg(p2p, "Do not report rejected device");
5381                 p2p_parse_free(&msg);
5382                 return 0;
5383         }
5384
5385         if (!(dev->flags & P2P_DEV_REPORTED)) {
5386                 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
5387                                     !(dev->flags & P2P_DEV_REPORTED_ONCE));
5388                 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
5389         }
5390         p2p_parse_free(&msg);
5391
5392         if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
5393                 params->next_step = BOTH_GO;
5394         else if (role == P2P_GO_IN_A_GROUP)
5395                 params->next_step = JOIN_GROUP;
5396         else if (role == P2P_CLIENT_IN_A_GROUP) {
5397                 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
5398                 params->next_step = PEER_CLIENT;
5399         } else if (p2p->num_groups > 0)
5400                 params->next_step = AUTH_JOIN;
5401         else if (params->sel)
5402                 params->next_step = INIT_GO_NEG;
5403         else
5404                 params->next_step = RESP_GO_NEG;
5405
5406         return 0;
5407 }
5408
5409
5410 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
5411                                       int go_intent,
5412                                       const u8 *own_interface_addr)
5413 {
5414
5415         p2p->authorized_oob_dev_pw_id = dev_pw_id;
5416         if (dev_pw_id == 0) {
5417                 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
5418                 return;
5419         }
5420
5421         p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
5422                 dev_pw_id);
5423
5424         p2p->go_intent = go_intent;
5425         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
5426 }
5427
5428 #endif /* CONFIG_WPS_NFC */
5429
5430
5431 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
5432 {
5433         if (len < 8 || len > 63)
5434                 return -1;
5435         p2p->cfg->passphrase_len = len;
5436         return 0;
5437 }
5438
5439
5440 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
5441 {
5442         p2p->vendor_elem = vendor_elem;
5443 }
5444
5445
5446 void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx)
5447 {
5448         struct p2p_data *p2p = eloop_ctx;
5449
5450         p2p_dbg(p2p,
5451                 "Timeout on waiting peer to become ready for GO Negotiation");
5452         p2p_go_neg_failed(p2p, -1);
5453 }
5454
5455
5456 void p2p_set_own_pref_freq_list(struct p2p_data *p2p,
5457                                 const unsigned int *pref_freq_list,
5458                                 unsigned int size)
5459 {
5460         unsigned int i;
5461
5462         if (size > P2P_MAX_PREF_CHANNELS)
5463                 size = P2P_MAX_PREF_CHANNELS;
5464         p2p->num_pref_freq = size;
5465         for (i = 0; i < size; i++) {
5466                 p2p->pref_freq_list[i] = pref_freq_list[i];
5467                 p2p_dbg(p2p, "Own preferred frequency list[%u]=%u MHz",
5468                         i, p2p->pref_freq_list[i]);
5469         }
5470 }