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