src/p2p/p2p.c

   1 /*
   2  * Wi-Fi Direct - P2P module
   3  * Copyright (c) 2009-2010, Atheros Communications
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "eloop.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/ieee802_11_common.h"
  15 #include "common/wpa_ctrl.h"
  16 #include "wps/wps_i.h"
  17 #include "p2p_i.h"
  18 #include "p2p.h"
  19
  20
  21 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
  22 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
  23 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
  24                                      const u8 *sa, const u8 *data, size_t len,
  25                                      int rx_freq);
  26 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
  27                                       const u8 *sa, const u8 *data,
  28                                       size_t len);
  29 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
  30 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx);
  31
  32
  33 /*
  34  * p2p_scan recovery timeout
  35  *
  36  * Many drivers are using 30 second timeout on scan results. Allow a bit larger
  37  * timeout for this to avoid hitting P2P timeout unnecessarily.
  38  */
  39 #define P2P_SCAN_TIMEOUT 35
  40
  41 /**
  42  * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer
  43  * entries will be removed
  44  */
  45 #ifndef P2P_PEER_EXPIRATION_AGE
  46 #define P2P_PEER_EXPIRATION_AGE 60
  47 #endif /* P2P_PEER_EXPIRATION_AGE */
  48
  49 #define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2)
  50
  51 static void p2p_expire_peers(struct p2p_data *p2p)
  52 {
  53         struct p2p_device *dev, *n;
  54         struct os_reltime now;
  55         size_t i;
  56
  57         os_get_reltime(&now);
  58         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
  59                 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
  60                         continue;
  61
  62                 if (dev == p2p->go_neg_peer) {
  63                         /*
  64                          * GO Negotiation is in progress with the peer, so
  65                          * don't expire the peer entry until GO Negotiation
  66                          * fails or times out.
  67                          */
  68                         continue;
  69                 }
  70
  71                 if (p2p->cfg->go_connected &&
  72                     p2p->cfg->go_connected(p2p->cfg->cb_ctx,
  73                                            dev->info.p2p_device_addr)) {
  74                         /*
  75                          * We are connected as a client to a group in which the
  76                          * peer is the GO, so do not expire the peer entry.
  77                          */
  78                         os_get_reltime(&dev->last_seen);
  79                         continue;
  80                 }
  81
  82                 for (i = 0; i < p2p->num_groups; i++) {
  83                         if (p2p_group_is_client_connected(
  84                                     p2p->groups[i], dev->info.p2p_device_addr))
  85                                 break;
  86                 }
  87                 if (i < p2p->num_groups) {
  88                         /*
  89                          * The peer is connected as a client in a group where
  90                          * we are the GO, so do not expire the peer entry.
  91                          */
  92                         os_get_reltime(&dev->last_seen);
  93                         continue;
  94                 }
  95
  96                 p2p_dbg(p2p, "Expiring old peer entry " MACSTR,
  97                         MAC2STR(dev->info.p2p_device_addr));
  98                 dl_list_del(&dev->list);
  99                 p2p_device_free(p2p, dev);
 100         }
 101 }
 102
 103
 104 static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx)
 105 {
 106         struct p2p_data *p2p = eloop_ctx;
 107         p2p_expire_peers(p2p);
 108         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
 109                                p2p_expiration_timeout, p2p, NULL);
 110 }
 111
 112
 113 static const char * p2p_state_txt(int state)
 114 {
 115         switch (state) {
 116         case P2P_IDLE:
 117                 return "IDLE";
 118         case P2P_SEARCH:
 119                 return "SEARCH";
 120         case P2P_CONNECT:
 121                 return "CONNECT";
 122         case P2P_CONNECT_LISTEN:
 123                 return "CONNECT_LISTEN";
 124         case P2P_GO_NEG:
 125                 return "GO_NEG";
 126         case P2P_LISTEN_ONLY:
 127                 return "LISTEN_ONLY";
 128         case P2P_WAIT_PEER_CONNECT:
 129                 return "WAIT_PEER_CONNECT";
 130         case P2P_WAIT_PEER_IDLE:
 131                 return "WAIT_PEER_IDLE";
 132         case P2P_SD_DURING_FIND:
 133                 return "SD_DURING_FIND";
 134         case P2P_PROVISIONING:
 135                 return "PROVISIONING";
 136         case P2P_PD_DURING_FIND:
 137                 return "PD_DURING_FIND";
 138         case P2P_INVITE:
 139                 return "INVITE";
 140         case P2P_INVITE_LISTEN:
 141                 return "INVITE_LISTEN";
 142         default:
 143                 return "?";
 144         }
 145 }
 146
 147
 148 const char * p2p_get_state_txt(struct p2p_data *p2p)
 149 {
 150         return p2p_state_txt(p2p->state);
 151 }
 152
 153
 154 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 155 {
 156         struct p2p_device *dev = NULL;
 157
 158         if (!addr || !p2p)
 159                 return 0;
 160
 161         dev = p2p_get_device(p2p, addr);
 162         if (dev)
 163                 return dev->wps_prov_info;
 164         else
 165                 return 0;
 166 }
 167
 168
 169 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 170 {
 171         struct p2p_device *dev = NULL;
 172
 173         if (!addr || !p2p)
 174                 return;
 175
 176         dev = p2p_get_device(p2p, addr);
 177         if (dev)
 178                 dev->wps_prov_info = 0;
 179 }
 180
 181
 182 void p2p_set_state(struct p2p_data *p2p, int new_state)
 183 {
 184         p2p_dbg(p2p, "State %s -> %s",
 185                 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
 186         p2p->state = new_state;
 187
 188         if (new_state == P2P_IDLE && p2p->pending_channel) {
 189                 p2p_dbg(p2p, "Apply change in listen channel");
 190                 p2p->cfg->reg_class = p2p->pending_reg_class;
 191                 p2p->cfg->channel = p2p->pending_channel;
 192                 p2p->pending_reg_class = 0;
 193                 p2p->pending_channel = 0;
 194         }
 195 }
 196
 197
 198 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
 199 {
 200         p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
 201                 p2p_state_txt(p2p->state), sec, usec);
 202         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 203         eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
 204 }
 205
 206
 207 void p2p_clear_timeout(struct p2p_data *p2p)
 208 {
 209         p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
 210         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 211 }
 212
 213
 214 void p2p_go_neg_failed(struct p2p_data *p2p, struct p2p_device *peer,
 215                        int status)
 216 {
 217         struct p2p_go_neg_results res;
 218         p2p_clear_timeout(p2p);
 219         p2p_set_state(p2p, P2P_IDLE);
 220         if (p2p->go_neg_peer) {
 221                 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
 222                 p2p->go_neg_peer->wps_method = WPS_NOT_READY;
 223                 p2p->go_neg_peer->oob_pw_id = 0;
 224         }
 225         p2p->go_neg_peer = NULL;
 226
 227         os_memset(&res, 0, sizeof(res));
 228         res.status = status;
 229         if (peer) {
 230                 wpabuf_free(peer->go_neg_conf);
 231                 peer->go_neg_conf = NULL;
 232                 os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr,
 233                           ETH_ALEN);
 234                 os_memcpy(res.peer_interface_addr, peer->intended_addr,
 235                           ETH_ALEN);
 236         }
 237         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
 238 }
 239
 240
 241 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
 242 {
 243         unsigned int r, tu;
 244         int freq;
 245         struct wpabuf *ies;
 246
 247         p2p_dbg(p2p, "Starting short listen state (state=%s)",
 248                 p2p_state_txt(p2p->state));
 249
 250         if (p2p->pending_listen_freq) {
 251                 /* We have a pending p2p_listen request */
 252                 p2p_dbg(p2p, "p2p_listen command pending already");
 253                 return;
 254         }
 255
 256         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 257         if (freq < 0) {
 258                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 259                 return;
 260         }
 261
 262         if (os_get_random((u8 *) &r, sizeof(r)) < 0)
 263                 r = 0;
 264         tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
 265               p2p->min_disc_int) * 100;
 266         if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
 267                 tu = p2p->max_disc_tu;
 268         if (!dev_disc && tu < 100)
 269                 tu = 100; /* Need to wait in non-device discovery use cases */
 270         if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
 271                 tu = p2p->cfg->max_listen * 1000 / 1024;
 272
 273         if (tu == 0) {
 274                 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
 275                 p2p_set_timeout(p2p, 0, 0);
 276                 return;
 277         }
 278
 279         ies = p2p_build_probe_resp_ies(p2p);
 280         if (ies == NULL)
 281                 return;
 282
 283         p2p->pending_listen_freq = freq;
 284         p2p->pending_listen_sec = 0;
 285         p2p->pending_listen_usec = 1024 * tu;
 286
 287         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
 288                     ies) < 0) {
 289                 p2p_dbg(p2p, "Failed to start listen mode");
 290                 p2p->pending_listen_freq = 0;
 291         }
 292         wpabuf_free(ies);
 293 }
 294
 295
 296 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
 297 {
 298         int freq;
 299         struct wpabuf *ies;
 300
 301         p2p_dbg(p2p, "Going to listen(only) state");
 302
 303         if (p2p->pending_listen_freq) {
 304                 /* We have a pending p2p_listen request */
 305                 p2p_dbg(p2p, "p2p_listen command pending already");
 306                 return -1;
 307         }
 308
 309         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 310         if (freq < 0) {
 311                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 312                 return -1;
 313         }
 314
 315         p2p->pending_listen_sec = timeout / 1000;
 316         p2p->pending_listen_usec = (timeout % 1000) * 1000;
 317
 318         if (p2p->p2p_scan_running) {
 319                 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
 320                         p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
 321                         return 0;
 322                 }
 323                 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
 324                 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
 325                 return 0;
 326         }
 327
 328         ies = p2p_build_probe_resp_ies(p2p);
 329         if (ies == NULL)
 330                 return -1;
 331
 332         p2p->pending_listen_freq = freq;
 333
 334         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
 335                 p2p_dbg(p2p, "Failed to start listen mode");
 336                 p2p->pending_listen_freq = 0;
 337                 wpabuf_free(ies);
 338                 return -1;
 339         }
 340         wpabuf_free(ies);
 341
 342         p2p_set_state(p2p, P2P_LISTEN_ONLY);
 343
 344         return 0;
 345 }
 346
 347
 348 static void p2p_device_clear_reported(struct p2p_data *p2p)
 349 {
 350         struct p2p_device *dev;
 351         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list)
 352                 dev->flags &= ~P2P_DEV_REPORTED;
 353 }
 354
 355
 356 /**
 357  * p2p_get_device - Fetch a peer entry
 358  * @p2p: P2P module context from p2p_init()
 359  * @addr: P2P Device Address of the peer
 360  * Returns: Pointer to the device entry or %NULL if not found
 361  */
 362 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
 363 {
 364         struct p2p_device *dev;
 365         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 366                 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
 367                         return dev;
 368         }
 369         return NULL;
 370 }
 371
 372
 373 /**
 374  * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
 375  * @p2p: P2P module context from p2p_init()
 376  * @addr: P2P Interface Address of the peer
 377  * Returns: Pointer to the device entry or %NULL if not found
 378  */
 379 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
 380                                              const u8 *addr)
 381 {
 382         struct p2p_device *dev;
 383         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 384                 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
 385                         return dev;
 386         }
 387         return NULL;
 388 }
 389
 390
 391 /**
 392  * p2p_create_device - Create a peer entry
 393  * @p2p: P2P module context from p2p_init()
 394  * @addr: P2P Device Address of the peer
 395  * Returns: Pointer to the device entry or %NULL on failure
 396  *
 397  * If there is already an entry for the peer, it will be returned instead of
 398  * creating a new one.
 399  */
 400 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
 401                                              const u8 *addr)
 402 {
 403         struct p2p_device *dev, *oldest = NULL;
 404         size_t count = 0;
 405
 406         dev = p2p_get_device(p2p, addr);
 407         if (dev)
 408                 return dev;
 409
 410         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 411                 count++;
 412                 if (oldest == NULL ||
 413                     os_reltime_before(&dev->last_seen, &oldest->last_seen))
 414                         oldest = dev;
 415         }
 416         if (count + 1 > p2p->cfg->max_peers && oldest) {
 417                 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
 418                 dl_list_del(&oldest->list);
 419                 p2p_device_free(p2p, oldest);
 420         }
 421
 422         dev = os_zalloc(sizeof(*dev));
 423         if (dev == NULL)
 424                 return NULL;
 425         dl_list_add(&p2p->devices, &dev->list);
 426         os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
 427
 428         return dev;
 429 }
 430
 431
 432 static void p2p_copy_client_info(struct p2p_device *dev,
 433                                  struct p2p_client_info *cli)
 434 {
 435         os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
 436         dev->info.device_name[cli->dev_name_len] = '\0';
 437         dev->info.dev_capab = cli->dev_capab;
 438         dev->info.config_methods = cli->config_methods;
 439         os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
 440         dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
 441         os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
 442                   dev->info.wps_sec_dev_type_list_len);
 443 }
 444
 445
 446 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
 447                                  const u8 *go_interface_addr, int freq,
 448                                  const u8 *gi, size_t gi_len)
 449 {
 450         struct p2p_group_info info;
 451         size_t c;
 452         struct p2p_device *dev;
 453
 454         if (gi == NULL)
 455                 return 0;
 456
 457         if (p2p_group_info_parse(gi, gi_len, &info) < 0)
 458                 return -1;
 459
 460         /*
 461          * Clear old data for this group; if the devices are still in the
 462          * group, the information will be restored in the loop following this.
 463          */
 464         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 465                 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
 466                               ETH_ALEN) == 0) {
 467                         os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
 468                         os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
 469                 }
 470         }
 471
 472         for (c = 0; c < info.num_clients; c++) {
 473                 struct p2p_client_info *cli = &info.client[c];
 474                 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
 475                               ETH_ALEN) == 0)
 476                         continue; /* ignore our own entry */
 477                 dev = p2p_get_device(p2p, cli->p2p_device_addr);
 478                 if (dev) {
 479                         if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
 480                                           P2P_DEV_PROBE_REQ_ONLY)) {
 481                                 /*
 482                                  * Update information since we have not
 483                                  * received this directly from the client.
 484                                  */
 485                                 p2p_copy_client_info(dev, cli);
 486                         } else {
 487                                 /*
 488                                  * Need to update P2P Client Discoverability
 489                                  * flag since it is valid only in P2P Group
 490                                  * Info attribute.
 491                                  */
 492                                 dev->info.dev_capab &=
 493                                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 494                                 dev->info.dev_capab |=
 495                                         cli->dev_capab &
 496                                         P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 497                         }
 498                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
 499                                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
 500                         }
 501                 } else {
 502                         dev = p2p_create_device(p2p, cli->p2p_device_addr);
 503                         if (dev == NULL)
 504                                 continue;
 505                         dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
 506                         p2p_copy_client_info(dev, cli);
 507                         dev->oper_freq = freq;
 508                         p2p->cfg->dev_found(p2p->cfg->cb_ctx,
 509                                             dev->info.p2p_device_addr,
 510                                             &dev->info, 1);
 511                         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 512                 }
 513
 514                 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
 515                           ETH_ALEN);
 516                 os_get_reltime(&dev->last_seen);
 517                 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
 518                 os_memcpy(dev->member_in_go_iface, go_interface_addr,
 519                           ETH_ALEN);
 520         }
 521
 522         return 0;
 523 }
 524
 525
 526 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
 527                               int probe_req, const struct p2p_message *msg)
 528 {
 529         os_memcpy(dev->info.device_name, msg->device_name,
 530                   sizeof(dev->info.device_name));
 531
 532         if (msg->manufacturer &&
 533             msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
 534                 os_memset(dev->info.manufacturer, 0,
 535                           sizeof(dev->info.manufacturer));
 536                 os_memcpy(dev->info.manufacturer, msg->manufacturer,
 537                           msg->manufacturer_len);
 538         }
 539
 540         if (msg->model_name &&
 541             msg->model_name_len < sizeof(dev->info.model_name)) {
 542                 os_memset(dev->info.model_name, 0,
 543                           sizeof(dev->info.model_name));
 544                 os_memcpy(dev->info.model_name, msg->model_name,
 545                           msg->model_name_len);
 546         }
 547
 548         if (msg->model_number &&
 549             msg->model_number_len < sizeof(dev->info.model_number)) {
 550                 os_memset(dev->info.model_number, 0,
 551                           sizeof(dev->info.model_number));
 552                 os_memcpy(dev->info.model_number, msg->model_number,
 553                           msg->model_number_len);
 554         }
 555
 556         if (msg->serial_number &&
 557             msg->serial_number_len < sizeof(dev->info.serial_number)) {
 558                 os_memset(dev->info.serial_number, 0,
 559                           sizeof(dev->info.serial_number));
 560                 os_memcpy(dev->info.serial_number, msg->serial_number,
 561                           msg->serial_number_len);
 562         }
 563
 564         if (msg->pri_dev_type)
 565                 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
 566                           sizeof(dev->info.pri_dev_type));
 567         else if (msg->wps_pri_dev_type)
 568                 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
 569                           sizeof(dev->info.pri_dev_type));
 570
 571         if (msg->wps_sec_dev_type_list) {
 572                 os_memcpy(dev->info.wps_sec_dev_type_list,
 573                           msg->wps_sec_dev_type_list,
 574                           msg->wps_sec_dev_type_list_len);
 575                 dev->info.wps_sec_dev_type_list_len =
 576                         msg->wps_sec_dev_type_list_len;
 577         }
 578
 579         if (msg->capability) {
 580                 /*
 581                  * P2P Client Discoverability bit is reserved in all frames
 582                  * that use this function, so do not change its value here.
 583                  */
 584                 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 585                 dev->info.dev_capab |= msg->capability[0] &
 586                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 587                 dev->info.group_capab = msg->capability[1];
 588         }
 589
 590         if (msg->ext_listen_timing) {
 591                 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
 592                 dev->ext_listen_interval =
 593                         WPA_GET_LE16(msg->ext_listen_timing + 2);
 594         }
 595
 596         if (!probe_req) {
 597                 u16 new_config_methods;
 598                 new_config_methods = msg->config_methods ?
 599                         msg->config_methods : msg->wps_config_methods;
 600                 if (new_config_methods &&
 601                     dev->info.config_methods != new_config_methods) {
 602                         p2p_dbg(p2p, "Update peer " MACSTR
 603                                 " config_methods 0x%x -> 0x%x",
 604                                 MAC2STR(dev->info.p2p_device_addr),
 605                                 dev->info.config_methods,
 606                                 new_config_methods);
 607                         dev->info.config_methods = new_config_methods;
 608                 }
 609         }
 610 }
 611
 612
 613 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies,
 614                                          size_t ies_len)
 615 {
 616         const u8 *pos, *end;
 617         u8 id, len;
 618
 619         wpabuf_free(dev->info.vendor_elems);
 620         dev->info.vendor_elems = NULL;
 621
 622         end = ies + ies_len;
 623
 624         for (pos = ies; pos + 1 < end; pos += len) {
 625                 id = *pos++;
 626                 len = *pos++;
 627
 628                 if (pos + len > end)
 629                         break;
 630
 631                 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3)
 632                         continue;
 633
 634                 if (len >= 4) {
 635                         u32 type = WPA_GET_BE32(pos);
 636
 637                         if (type == WPA_IE_VENDOR_TYPE ||
 638                             type == WMM_IE_VENDOR_TYPE ||
 639                             type == WPS_IE_VENDOR_TYPE ||
 640                             type == P2P_IE_VENDOR_TYPE ||
 641                             type == WFD_IE_VENDOR_TYPE)
 642                                 continue;
 643                 }
 644
 645                 /* Unknown vendor element - make raw IE data available */
 646                 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0)
 647                         break;
 648                 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len);
 649         }
 650 }
 651
 652
 653 static int p2p_compare_wfd_info(struct p2p_device *dev,
 654                               const struct p2p_message *msg)
 655 {
 656         if (dev->info.wfd_subelems && msg->wfd_subelems) {
 657                 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used)
 658                         return 1;
 659
 660                 return os_memcmp(dev->info.wfd_subelems->buf,
 661                                  msg->wfd_subelems->buf,
 662                                  dev->info.wfd_subelems->used);
 663         }
 664         if (dev->info.wfd_subelems || msg->wfd_subelems)
 665                 return 1;
 666
 667         return 0;
 668 }
 669
 670
 671 /**
 672  * p2p_add_device - Add peer entries based on scan results or P2P frames
 673  * @p2p: P2P module context from p2p_init()
 674  * @addr: Source address of Beacon or Probe Response frame (may be either
 675  *      P2P Device Address or P2P Interface Address)
 676  * @level: Signal level (signal strength of the received frame from the peer)
 677  * @freq: Frequency on which the Beacon or Probe Response frame was received
 678  * @rx_time: Time when the result was received
 679  * @ies: IEs from the Beacon or Probe Response frame
 680  * @ies_len: Length of ies buffer in octets
 681  * @scan_res: Whether this was based on scan results
 682  * Returns: 0 on success, -1 on failure
 683  *
 684  * If the scan result is for a GO, the clients in the group will also be added
 685  * to the peer table. This function can also be used with some other frames
 686  * like Provision Discovery Request that contains P2P Capability and P2P Device
 687  * Info attributes.
 688  */
 689 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
 690                    struct os_reltime *rx_time, int level, const u8 *ies,
 691                    size_t ies_len, int scan_res)
 692 {
 693         struct p2p_device *dev;
 694         struct p2p_message msg;
 695         const u8 *p2p_dev_addr;
 696         int wfd_changed;
 697         int i;
 698         struct os_reltime time_now;
 699
 700         os_memset(&msg, 0, sizeof(msg));
 701         if (p2p_parse_ies(ies, ies_len, &msg)) {
 702                 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
 703                 p2p_parse_free(&msg);
 704                 return -1;
 705         }
 706
 707         if (msg.p2p_device_addr)
 708                 p2p_dev_addr = msg.p2p_device_addr;
 709         else if (msg.device_id)
 710                 p2p_dev_addr = msg.device_id;
 711         else {
 712                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
 713                 p2p_parse_free(&msg);
 714                 return -1;
 715         }
 716
 717         if (!is_zero_ether_addr(p2p->peer_filter) &&
 718             os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
 719                 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
 720                         " due to peer filter", MAC2STR(p2p_dev_addr));
 721                 p2p_parse_free(&msg);
 722                 return 0;
 723         }
 724
 725         dev = p2p_create_device(p2p, p2p_dev_addr);
 726         if (dev == NULL) {
 727                 p2p_parse_free(&msg);
 728                 return -1;
 729         }
 730
 731         if (rx_time == NULL) {
 732                 os_get_reltime(&time_now);
 733                 rx_time = &time_now;
 734         }
 735
 736         /*
 737          * Update the device entry only if the new peer
 738          * entry is newer than the one previously stored.
 739          */
 740         if (dev->last_seen.sec > 0 &&
 741             os_reltime_before(rx_time, &dev->last_seen)) {
 742                 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)",
 743                         (unsigned int) rx_time->sec,
 744                         (unsigned int) rx_time->usec,
 745                         (unsigned int) dev->last_seen.sec,
 746                         (unsigned int) dev->last_seen.usec);
 747                 p2p_parse_free(&msg);
 748                 return -1;
 749         }
 750
 751         os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
 752
 753         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
 754
 755         if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
 756                 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
 757         if (msg.ssid &&
 758             (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
 759              os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
 760              != 0)) {
 761                 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
 762                 dev->oper_ssid_len = msg.ssid[1];
 763         }
 764
 765         if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
 766             *msg.ds_params >= 1 && *msg.ds_params <= 14) {
 767                 int ds_freq;
 768                 if (*msg.ds_params == 14)
 769                         ds_freq = 2484;
 770                 else
 771                         ds_freq = 2407 + *msg.ds_params * 5;
 772                 if (freq != ds_freq) {
 773                         p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
 774                                 freq, ds_freq);
 775                         freq = ds_freq;
 776                 }
 777         }
 778
 779         if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
 780                 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
 781                         MACSTR " %d -> %d MHz (DS param %d)",
 782                         MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
 783                         freq, msg.ds_params ? *msg.ds_params : -1);
 784         }
 785         if (scan_res) {
 786                 dev->listen_freq = freq;
 787                 if (msg.group_info)
 788                         dev->oper_freq = freq;
 789         }
 790         dev->info.level = level;
 791
 792         p2p_copy_wps_info(p2p, dev, 0, &msg);
 793
 794         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 795                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 796                 dev->info.wps_vendor_ext[i] = NULL;
 797         }
 798
 799         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 800                 if (msg.wps_vendor_ext[i] == NULL)
 801                         break;
 802                 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
 803                         msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
 804                 if (dev->info.wps_vendor_ext[i] == NULL)
 805                         break;
 806         }
 807
 808         wfd_changed = p2p_compare_wfd_info(dev, &msg);
 809
 810         if (msg.wfd_subelems) {
 811                 wpabuf_free(dev->info.wfd_subelems);
 812                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
 813         }
 814
 815         if (scan_res) {
 816                 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
 817                                       msg.group_info, msg.group_info_len);
 818         }
 819
 820         p2p_parse_free(&msg);
 821
 822         p2p_update_peer_vendor_elems(dev, ies, ies_len);
 823
 824         if (dev->flags & P2P_DEV_REPORTED && !wfd_changed)
 825                 return 0;
 826
 827         p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
 828                 freq, (unsigned int) rx_time->sec,
 829                 (unsigned int) rx_time->usec);
 830         if (dev->flags & P2P_DEV_USER_REJECTED) {
 831                 p2p_dbg(p2p, "Do not report rejected device");
 832                 return 0;
 833         }
 834
 835         if (dev->info.config_methods == 0 &&
 836             (freq == 2412 || freq == 2437 || freq == 2462)) {
 837                 /*
 838                  * If we have only seen a Beacon frame from a GO, we do not yet
 839                  * know what WPS config methods it supports. Since some
 840                  * applications use config_methods value from P2P-DEVICE-FOUND
 841                  * events, postpone reporting this peer until we've fully
 842                  * discovered its capabilities.
 843                  *
 844                  * At least for now, do this only if the peer was detected on
 845                  * one of the social channels since that peer can be easily be
 846                  * found again and there are no limitations of having to use
 847                  * passive scan on this channels, so this can be done through
 848                  * Probe Response frame that includes the config_methods
 849                  * information.
 850                  */
 851                 p2p_dbg(p2p, "Do not report peer " MACSTR
 852                         " with unknown config methods", MAC2STR(addr));
 853                 return 0;
 854         }
 855
 856         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
 857                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
 858         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 859
 860         return 0;
 861 }
 862
 863
 864 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
 865 {
 866         int i;
 867
 868         if (p2p->go_neg_peer == dev) {
 869                 /*
 870                  * If GO Negotiation is in progress, report that it has failed.
 871                  */
 872                 p2p_go_neg_failed(p2p, dev, -1);
 873                 p2p->go_neg_peer = NULL;
 874         }
 875         if (p2p->invite_peer == dev)
 876                 p2p->invite_peer = NULL;
 877         if (p2p->sd_peer == dev)
 878                 p2p->sd_peer = NULL;
 879         if (p2p->pending_client_disc_go == dev)
 880                 p2p->pending_client_disc_go = NULL;
 881
 882         /* dev_lost() device, but only if it was previously dev_found() */
 883         if (dev->flags & P2P_DEV_REPORTED_ONCE)
 884                 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
 885                                    dev->info.p2p_device_addr);
 886
 887         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 888                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 889                 dev->info.wps_vendor_ext[i] = NULL;
 890         }
 891
 892         wpabuf_free(dev->info.wfd_subelems);
 893         wpabuf_free(dev->info.vendor_elems);
 894         wpabuf_free(dev->go_neg_conf);
 895
 896         os_free(dev);
 897 }
 898
 899
 900 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
 901 {
 902         struct p2p_channels *c;
 903         struct p2p_reg_class *cla;
 904         size_t cl, ch;
 905         int found = 0;
 906         u8 reg_class;
 907         u8 channel;
 908         int freq;
 909
 910         c = &p2p->cfg->channels;
 911         for (cl = 0; cl < c->reg_classes; cl++) {
 912                 cla = &c->reg_class[cl];
 913                 if (cla->reg_class != p2p->last_prog_scan_class)
 914                         continue;
 915                 for (ch = 0; ch < cla->channels; ch++) {
 916                         if (cla->channel[ch] == p2p->last_prog_scan_chan) {
 917                                 found = 1;
 918                                 break;
 919                         }
 920                 }
 921                 if (found)
 922                         break;
 923         }
 924
 925         if (!found) {
 926                 /* Start from beginning */
 927                 reg_class = c->reg_class[0].reg_class;
 928                 channel = c->reg_class[0].channel[0];
 929         } else {
 930                 /* Pick the next channel */
 931                 ch++;
 932                 if (ch == cla->channels) {
 933                         cl++;
 934                         if (cl == c->reg_classes)
 935                                 cl = 0;
 936                         ch = 0;
 937                 }
 938                 reg_class = c->reg_class[cl].reg_class;
 939                 channel = c->reg_class[cl].channel[ch];
 940         }
 941
 942         freq = p2p_channel_to_freq(reg_class, channel);
 943         p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
 944                 reg_class, channel, freq);
 945         p2p->last_prog_scan_class = reg_class;
 946         p2p->last_prog_scan_chan = channel;
 947
 948         if (freq == 2412 || freq == 2437 || freq == 2462)
 949                 return 0; /* No need to add social channels */
 950         return freq;
 951 }
 952
 953
 954 static void p2p_search(struct p2p_data *p2p)
 955 {
 956         int freq = 0;
 957         enum p2p_scan_type type;
 958         u16 pw_id = DEV_PW_DEFAULT;
 959         int res;
 960
 961         if (p2p->drv_in_listen) {
 962                 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
 963                 return;
 964         }
 965         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
 966
 967         if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
 968             (freq = p2p_get_next_prog_freq(p2p)) > 0) {
 969                 type = P2P_SCAN_SOCIAL_PLUS_ONE;
 970                 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
 971         } else {
 972                 type = P2P_SCAN_SOCIAL;
 973                 p2p_dbg(p2p, "Starting search");
 974         }
 975
 976         res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
 977                                  p2p->num_req_dev_types, p2p->req_dev_types,
 978                                  p2p->find_dev_id, pw_id);
 979         if (res < 0) {
 980                 p2p_dbg(p2p, "Scan request failed");
 981                 p2p_continue_find(p2p);
 982         } else {
 983                 p2p_dbg(p2p, "Running p2p_scan");
 984                 p2p->p2p_scan_running = 1;
 985                 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
 986                 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
 987                                        p2p, NULL);
 988         }
 989 }
 990
 991
 992 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
 993 {
 994         struct p2p_data *p2p = eloop_ctx;
 995         p2p_dbg(p2p, "Find timeout -> stop");
 996         p2p_stop_find(p2p);
 997 }
 998
 999
1000 static int p2p_run_after_scan(struct p2p_data *p2p)
1001 {
1002         struct p2p_device *dev;
1003         enum p2p_after_scan op;
1004
1005         if (p2p->after_scan_tx) {
1006                 p2p->after_scan_tx_in_progress = 1;
1007                 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
1008                 p2p->cfg->send_action(p2p->cfg->cb_ctx,
1009                                       p2p->after_scan_tx->freq,
1010                                       p2p->after_scan_tx->dst,
1011                                       p2p->after_scan_tx->src,
1012                                       p2p->after_scan_tx->bssid,
1013                                       (u8 *) (p2p->after_scan_tx + 1),
1014                                       p2p->after_scan_tx->len,
1015                                       p2p->after_scan_tx->wait_time);
1016                 os_free(p2p->after_scan_tx);
1017                 p2p->after_scan_tx = NULL;
1018                 return 1;
1019         }
1020
1021         op = p2p->start_after_scan;
1022         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1023         switch (op) {
1024         case P2P_AFTER_SCAN_NOTHING:
1025                 break;
1026         case P2P_AFTER_SCAN_LISTEN:
1027                 p2p_dbg(p2p, "Start previously requested Listen state");
1028                 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
1029                            p2p->pending_listen_usec / 1000);
1030                 return 1;
1031         case P2P_AFTER_SCAN_CONNECT:
1032                 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
1033                         MAC2STR(p2p->after_scan_peer));
1034                 dev = p2p_get_device(p2p, p2p->after_scan_peer);
1035                 if (dev == NULL) {
1036                         p2p_dbg(p2p, "Peer not known anymore");
1037                         break;
1038                 }
1039                 p2p_connect_send(p2p, dev);
1040                 return 1;
1041         }
1042
1043         return 0;
1044 }
1045
1046
1047 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1048 {
1049         struct p2p_data *p2p = eloop_ctx;
1050         int running;
1051         p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
1052         running = p2p->p2p_scan_running;
1053         /* Make sure we recover from missed scan results callback */
1054         p2p->p2p_scan_running = 0;
1055
1056         if (running)
1057                 p2p_run_after_scan(p2p);
1058 }
1059
1060
1061 static void p2p_free_req_dev_types(struct p2p_data *p2p)
1062 {
1063         p2p->num_req_dev_types = 0;
1064         os_free(p2p->req_dev_types);
1065         p2p->req_dev_types = NULL;
1066 }
1067
1068
1069 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
1070              enum p2p_discovery_type type,
1071              unsigned int num_req_dev_types, const u8 *req_dev_types,
1072              const u8 *dev_id, unsigned int search_delay)
1073 {
1074         int res;
1075
1076         p2p_dbg(p2p, "Starting find (type=%d)", type);
1077         os_get_reltime(&p2p->find_start);
1078         if (p2p->p2p_scan_running) {
1079                 p2p_dbg(p2p, "p2p_scan is already running");
1080         }
1081
1082         p2p_free_req_dev_types(p2p);
1083         if (req_dev_types && num_req_dev_types) {
1084                 p2p->req_dev_types = os_malloc(num_req_dev_types *
1085                                                WPS_DEV_TYPE_LEN);
1086                 if (p2p->req_dev_types == NULL)
1087                         return -1;
1088                 os_memcpy(p2p->req_dev_types, req_dev_types,
1089                           num_req_dev_types * WPS_DEV_TYPE_LEN);
1090                 p2p->num_req_dev_types = num_req_dev_types;
1091         }
1092
1093         if (dev_id) {
1094                 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1095                 p2p->find_dev_id = p2p->find_dev_id_buf;
1096         } else
1097                 p2p->find_dev_id = NULL;
1098
1099         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1100         p2p_clear_timeout(p2p);
1101         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1102         p2p->find_type = type;
1103         p2p_device_clear_reported(p2p);
1104         p2p_set_state(p2p, P2P_SEARCH);
1105         p2p->search_delay = search_delay;
1106         p2p->in_search_delay = 0;
1107         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1108         p2p->last_p2p_find_timeout = timeout;
1109         if (timeout)
1110                 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1111                                        p2p, NULL);
1112         switch (type) {
1113         case P2P_FIND_START_WITH_FULL:
1114         case P2P_FIND_PROGRESSIVE:
1115                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1116                                          p2p->num_req_dev_types,
1117                                          p2p->req_dev_types, dev_id,
1118                                          DEV_PW_DEFAULT);
1119                 break;
1120         case P2P_FIND_ONLY_SOCIAL:
1121                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1122                                          p2p->num_req_dev_types,
1123                                          p2p->req_dev_types, dev_id,
1124                                          DEV_PW_DEFAULT);
1125                 break;
1126         default:
1127                 return -1;
1128         }
1129
1130         if (res == 0) {
1131                 p2p_dbg(p2p, "Running p2p_scan");
1132                 p2p->p2p_scan_running = 1;
1133                 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1134                 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1135                                        p2p, NULL);
1136         } else if (p2p->p2p_scan_running) {
1137                 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
1138                 /* wait for the previous p2p_scan to complete */
1139                 res = 0; /* do not report failure */
1140         } else {
1141                 p2p_dbg(p2p, "Failed to start p2p_scan");
1142                 p2p_set_state(p2p, P2P_IDLE);
1143                 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1144         }
1145
1146         return res;
1147 }
1148
1149
1150 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1151 {
1152         p2p_dbg(p2p, "Stopping find");
1153         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1154         p2p_clear_timeout(p2p);
1155         if (p2p->state == P2P_SEARCH)
1156                 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1157         p2p_set_state(p2p, P2P_IDLE);
1158         p2p_free_req_dev_types(p2p);
1159         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1160         if (p2p->go_neg_peer)
1161                 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1162         p2p->go_neg_peer = NULL;
1163         p2p->sd_peer = NULL;
1164         p2p->invite_peer = NULL;
1165         p2p_stop_listen_for_freq(p2p, freq);
1166 }
1167
1168
1169 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1170 {
1171         if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1172                 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1173                 return;
1174         }
1175         if (p2p->in_listen) {
1176                 p2p->in_listen = 0;
1177                 p2p_clear_timeout(p2p);
1178         }
1179         if (p2p->drv_in_listen) {
1180                 /*
1181                  * The driver may not deliver callback to p2p_listen_end()
1182                  * when the operation gets canceled, so clear the internal
1183                  * variable that is tracking driver state.
1184                  */
1185                 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1186                 p2p->drv_in_listen = 0;
1187         }
1188         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1189 }
1190
1191
1192 void p2p_stop_listen(struct p2p_data *p2p)
1193 {
1194         if (p2p->state != P2P_LISTEN_ONLY) {
1195                 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1196                 return;
1197         }
1198
1199         p2p_stop_listen_for_freq(p2p, 0);
1200         p2p_set_state(p2p, P2P_IDLE);
1201 }
1202
1203
1204 void p2p_stop_find(struct p2p_data *p2p)
1205 {
1206         p2p->pending_listen_freq = 0;
1207         p2p_stop_find_for_freq(p2p, 0);
1208 }
1209
1210
1211 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1212                                     unsigned int force_freq,
1213                                     unsigned int pref_freq, int go)
1214 {
1215         u8 op_class, op_channel;
1216         unsigned int freq = force_freq ? force_freq : pref_freq;
1217
1218         p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
1219                 force_freq, pref_freq, go);
1220         if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1221                 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1222                 return -1;
1223         }
1224
1225         if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
1226             (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
1227                                           op_channel))) {
1228                 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1229                         freq, op_class, op_channel);
1230                 return -1;
1231         }
1232
1233         p2p->op_reg_class = op_class;
1234         p2p->op_channel = op_channel;
1235
1236         if (force_freq) {
1237                 p2p->channels.reg_classes = 1;
1238                 p2p->channels.reg_class[0].channels = 1;
1239                 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1240                 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1241         } else {
1242                 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1243                           sizeof(struct p2p_channels));
1244         }
1245
1246         return 0;
1247 }
1248
1249
1250 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1251 {
1252         u8 op_class, op_channel;
1253         const int op_classes_5ghz[] = { 124, 115, 0 };
1254         const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
1255         const int op_classes_vht[] = { 128, 0 };
1256
1257         p2p_dbg(p2p, "Prepare channel best");
1258
1259         if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1260             p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1261             p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1262             == 0) {
1263                 p2p_dbg(p2p, "Select best overall channel as operating channel preference");
1264                 p2p->op_reg_class = op_class;
1265                 p2p->op_channel = op_channel;
1266         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1267                    p2p_supported_freq(p2p, p2p->best_freq_5) &&
1268                    p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1269                    == 0) {
1270                 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1271                 p2p->op_reg_class = op_class;
1272                 p2p->op_channel = op_channel;
1273         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1274                    p2p_supported_freq(p2p, p2p->best_freq_24) &&
1275                    p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1276                                        &op_channel) == 0) {
1277                 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1278                 p2p->op_reg_class = op_class;
1279                 p2p->op_channel = op_channel;
1280         } else if (p2p->cfg->num_pref_chan > 0 &&
1281                    p2p_channels_includes(&p2p->cfg->channels,
1282                                          p2p->cfg->pref_chan[0].op_class,
1283                                          p2p->cfg->pref_chan[0].chan)) {
1284                 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1285                 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1286                 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1287         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
1288                                       &p2p->op_reg_class, &p2p->op_channel) ==
1289                    0) {
1290                 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
1291                         p2p->op_reg_class, p2p->op_channel);
1292         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
1293                                       &p2p->op_reg_class, &p2p->op_channel) ==
1294                    0) {
1295                 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
1296                         p2p->op_reg_class, p2p->op_channel);
1297         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
1298                                       &p2p->op_reg_class, &p2p->op_channel) ==
1299                    0) {
1300                 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
1301                         p2p->op_reg_class, p2p->op_channel);
1302         } else if (p2p_channels_includes(&p2p->cfg->channels,
1303                                          p2p->cfg->op_reg_class,
1304                                          p2p->cfg->op_channel)) {
1305                 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1306                 p2p->op_reg_class = p2p->cfg->op_reg_class;
1307                 p2p->op_channel = p2p->cfg->op_channel;
1308         } else if (p2p_channel_random_social(&p2p->cfg->channels,
1309                                              &p2p->op_reg_class,
1310                                              &p2p->op_channel) == 0) {
1311                 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference",
1312                         p2p->op_reg_class, p2p->op_channel);
1313         } else {
1314                 /* Select any random available channel from the first available
1315                  * operating class */
1316                 p2p_channel_select(&p2p->cfg->channels, NULL,
1317                                    &p2p->op_reg_class,
1318                                    &p2p->op_channel);
1319                 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
1320                         p2p->op_channel, p2p->op_reg_class);
1321         }
1322
1323         os_memcpy(&p2p->channels, &p2p->cfg->channels,
1324                   sizeof(struct p2p_channels));
1325 }
1326
1327
1328 /**
1329  * p2p_prepare_channel - Select operating channel for GO Negotiation
1330  * @p2p: P2P module context from p2p_init()
1331  * @dev: Selected peer device
1332  * @force_freq: Forced frequency in MHz or 0 if not forced
1333  * @pref_freq: Preferred frequency in MHz or 0 if no preference
1334  * @go: Whether the local end will be forced to be GO
1335  * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1336  *
1337  * This function is used to do initial operating channel selection for GO
1338  * Negotiation prior to having received peer information. The selected channel
1339  * may be further optimized in p2p_reselect_channel() once the peer information
1340  * is available.
1341  */
1342 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1343                         unsigned int force_freq, unsigned int pref_freq, int go)
1344 {
1345         p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1346                 force_freq, pref_freq, go);
1347         if (force_freq || pref_freq) {
1348                 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1349                     0)
1350                         return -1;
1351         } else {
1352                 p2p_prepare_channel_best(p2p);
1353         }
1354         p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1355         if (go)
1356                 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1357         else if (!force_freq)
1358                 p2p_channels_union(&p2p->channels, &p2p->cfg->cli_channels,
1359                                    &p2p->channels);
1360         p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1361
1362         p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1363                 p2p->op_reg_class, p2p->op_channel,
1364                 force_freq ? " (forced)" : "");
1365
1366         if (force_freq)
1367                 dev->flags |= P2P_DEV_FORCE_FREQ;
1368         else
1369                 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1370
1371         return 0;
1372 }
1373
1374
1375 static void p2p_set_dev_persistent(struct p2p_device *dev,
1376                                    int persistent_group)
1377 {
1378         switch (persistent_group) {
1379         case 0:
1380                 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1381                                 P2P_DEV_PREFER_PERSISTENT_RECONN);
1382                 break;
1383         case 1:
1384                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1385                 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1386                 break;
1387         case 2:
1388                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1389                         P2P_DEV_PREFER_PERSISTENT_RECONN;
1390                 break;
1391         }
1392 }
1393
1394
1395 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1396                 enum p2p_wps_method wps_method,
1397                 int go_intent, const u8 *own_interface_addr,
1398                 unsigned int force_freq, int persistent_group,
1399                 const u8 *force_ssid, size_t force_ssid_len,
1400                 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1401 {
1402         struct p2p_device *dev;
1403
1404         p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1405                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1406                 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1407                 "oob_pw_id=%u",
1408                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1409                 wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
1410
1411         dev = p2p_get_device(p2p, peer_addr);
1412         if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1413                 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1414                         MAC2STR(peer_addr));
1415                 return -1;
1416         }
1417
1418         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1419                                 go_intent == 15) < 0)
1420                 return -1;
1421
1422         if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1423                 if (!(dev->info.dev_capab &
1424                       P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1425                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1426                                 " that is in a group and is not discoverable",
1427                                 MAC2STR(peer_addr));
1428                         return -1;
1429                 }
1430                 if (dev->oper_freq <= 0) {
1431                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1432                                 " with incomplete information",
1433                                 MAC2STR(peer_addr));
1434                         return -1;
1435                 }
1436
1437                 /*
1438                  * First, try to connect directly. If the peer does not
1439                  * acknowledge frames, assume it is sleeping and use device
1440                  * discoverability via the GO at that point.
1441                  */
1442         }
1443
1444         p2p->ssid_set = 0;
1445         if (force_ssid) {
1446                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1447                                   force_ssid, force_ssid_len);
1448                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1449                 p2p->ssid_len = force_ssid_len;
1450                 p2p->ssid_set = 1;
1451         }
1452
1453         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1454         dev->flags &= ~P2P_DEV_USER_REJECTED;
1455         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1456         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1457         if (pd_before_go_neg)
1458                 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1459         else {
1460                 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1461                 /*
1462                  * Assign dialog token and tie breaker here to use the same
1463                  * values in each retry within the same GO Negotiation exchange.
1464                  */
1465                 dev->dialog_token++;
1466                 if (dev->dialog_token == 0)
1467                         dev->dialog_token = 1;
1468                 dev->tie_breaker = p2p->next_tie_breaker;
1469                 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1470         }
1471         dev->connect_reqs = 0;
1472         dev->go_neg_req_sent = 0;
1473         dev->go_state = UNKNOWN_GO;
1474         p2p_set_dev_persistent(dev, persistent_group);
1475         p2p->go_intent = go_intent;
1476         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1477
1478         if (p2p->state != P2P_IDLE)
1479                 p2p_stop_find(p2p);
1480
1481         if (p2p->after_scan_tx) {
1482                 /*
1483                  * We need to drop the pending frame to avoid issues with the
1484                  * new GO Negotiation, e.g., when the pending frame was from a
1485                  * previous attempt at starting a GO Negotiation.
1486                  */
1487                 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1488                 os_free(p2p->after_scan_tx);
1489                 p2p->after_scan_tx = NULL;
1490         }
1491
1492         dev->wps_method = wps_method;
1493         dev->oob_pw_id = oob_pw_id;
1494         dev->status = P2P_SC_SUCCESS;
1495
1496         if (p2p->p2p_scan_running) {
1497                 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1498                 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1499                 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1500                 return 0;
1501         }
1502         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1503
1504         return p2p_connect_send(p2p, dev);
1505 }
1506
1507
1508 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1509                   enum p2p_wps_method wps_method,
1510                   int go_intent, const u8 *own_interface_addr,
1511                   unsigned int force_freq, int persistent_group,
1512                   const u8 *force_ssid, size_t force_ssid_len,
1513                   unsigned int pref_freq, u16 oob_pw_id)
1514 {
1515         struct p2p_device *dev;
1516
1517         p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1518                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1519                 " wps_method=%d  persistent_group=%d oob_pw_id=%u",
1520                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1521                 wps_method, persistent_group, oob_pw_id);
1522
1523         dev = p2p_get_device(p2p, peer_addr);
1524         if (dev == NULL) {
1525                 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1526                         MAC2STR(peer_addr));
1527                 return -1;
1528         }
1529
1530         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1531                                 15) < 0)
1532                 return -1;
1533
1534         p2p->ssid_set = 0;
1535         if (force_ssid) {
1536                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1537                                   force_ssid, force_ssid_len);
1538                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1539                 p2p->ssid_len = force_ssid_len;
1540                 p2p->ssid_set = 1;
1541         }
1542
1543         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1544         dev->flags &= ~P2P_DEV_USER_REJECTED;
1545         dev->go_neg_req_sent = 0;
1546         dev->go_state = UNKNOWN_GO;
1547         p2p_set_dev_persistent(dev, persistent_group);
1548         p2p->go_intent = go_intent;
1549         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1550
1551         dev->wps_method = wps_method;
1552         dev->oob_pw_id = oob_pw_id;
1553         dev->status = P2P_SC_SUCCESS;
1554
1555         return 0;
1556 }
1557
1558
1559 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1560                       struct p2p_device *dev, struct p2p_message *msg)
1561 {
1562         os_get_reltime(&dev->last_seen);
1563
1564         p2p_copy_wps_info(p2p, dev, 0, msg);
1565
1566         if (msg->listen_channel) {
1567                 int freq;
1568                 freq = p2p_channel_to_freq(msg->listen_channel[3],
1569                                            msg->listen_channel[4]);
1570                 if (freq < 0) {
1571                         p2p_dbg(p2p, "Unknown peer Listen channel: "
1572                                 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1573                                 msg->listen_channel[0],
1574                                 msg->listen_channel[1],
1575                                 msg->listen_channel[2],
1576                                 msg->listen_channel[3],
1577                                 msg->listen_channel[4]);
1578                 } else {
1579                         p2p_dbg(p2p, "Update peer " MACSTR
1580                                 " Listen channel: %u -> %u MHz",
1581                                 MAC2STR(dev->info.p2p_device_addr),
1582                                 dev->listen_freq, freq);
1583                         dev->listen_freq = freq;
1584                 }
1585         }
1586
1587         if (msg->wfd_subelems) {
1588                 wpabuf_free(dev->info.wfd_subelems);
1589                 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1590         }
1591
1592         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1593                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1594                 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1595         } else {
1596                 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1597                         MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1598                         "listen_freq=%d",
1599                         MAC2STR(dev->info.p2p_device_addr),
1600                         dev->info.dev_capab, dev->info.group_capab,
1601                         dev->info.device_name, dev->listen_freq);
1602         }
1603
1604         dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1605
1606         if (dev->flags & P2P_DEV_USER_REJECTED) {
1607                 p2p_dbg(p2p, "Do not report rejected device");
1608                 return;
1609         }
1610
1611         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1612                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
1613         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1614 }
1615
1616
1617 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1618 {
1619         os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1620         p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1621         os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1622                   p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1623         *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1624 }
1625
1626
1627 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1628 {
1629         p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
1630         p2p_random(params->passphrase, p2p->cfg->passphrase_len);
1631         return 0;
1632 }
1633
1634
1635 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1636 {
1637         struct p2p_go_neg_results res;
1638         int go = peer->go_state == LOCAL_GO;
1639         struct p2p_channels intersection;
1640         int freqs;
1641         size_t i, j;
1642
1643         p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1644                 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1645
1646         os_memset(&res, 0, sizeof(res));
1647         res.role_go = go;
1648         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1649         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1650         res.wps_method = peer->wps_method;
1651         if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1652                 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1653                         res.persistent_group = 2;
1654                 else
1655                         res.persistent_group = 1;
1656         }
1657
1658         if (go) {
1659                 /* Setup AP mode for WPS provisioning */
1660                 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1661                                                p2p->op_channel);
1662                 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1663                 res.ssid_len = p2p->ssid_len;
1664                 p2p_random(res.passphrase, p2p->cfg->passphrase_len);
1665         } else {
1666                 res.freq = peer->oper_freq;
1667                 if (p2p->ssid_len) {
1668                         os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1669                         res.ssid_len = p2p->ssid_len;
1670                 }
1671         }
1672
1673         p2p_channels_dump(p2p, "own channels", &p2p->channels);
1674         p2p_channels_dump(p2p, "peer channels", &peer->channels);
1675         p2p_channels_intersect(&p2p->channels, &peer->channels,
1676                                &intersection);
1677         if (go) {
1678                 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1679                 p2p_channels_dump(p2p, "intersection after no-GO removal",
1680                                   &intersection);
1681         }
1682         freqs = 0;
1683         for (i = 0; i < intersection.reg_classes; i++) {
1684                 struct p2p_reg_class *c = &intersection.reg_class[i];
1685                 if (freqs + 1 == P2P_MAX_CHANNELS)
1686                         break;
1687                 for (j = 0; j < c->channels; j++) {
1688                         int freq;
1689                         if (freqs + 1 == P2P_MAX_CHANNELS)
1690                                 break;
1691                         freq = p2p_channel_to_freq(c->reg_class, c->channel[j]);
1692                         if (freq < 0)
1693                                 continue;
1694                         res.freq_list[freqs++] = freq;
1695                 }
1696         }
1697
1698         res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1699
1700         p2p_clear_timeout(p2p);
1701         p2p->ssid_set = 0;
1702         peer->go_neg_req_sent = 0;
1703         peer->wps_method = WPS_NOT_READY;
1704         peer->oob_pw_id = 0;
1705         wpabuf_free(peer->go_neg_conf);
1706         peer->go_neg_conf = NULL;
1707
1708         p2p_set_state(p2p, P2P_PROVISIONING);
1709         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1710 }
1711
1712
1713 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1714                               const u8 *data, size_t len, int rx_freq)
1715 {
1716         p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1717         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1718
1719         if (len < 1)
1720                 return;
1721
1722         switch (data[0]) {
1723         case P2P_GO_NEG_REQ:
1724                 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1725                 break;
1726         case P2P_GO_NEG_RESP:
1727                 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1728                 break;
1729         case P2P_GO_NEG_CONF:
1730                 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1731                 break;
1732         case P2P_INVITATION_REQ:
1733                 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1734                                            rx_freq);
1735                 break;
1736         case P2P_INVITATION_RESP:
1737                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
1738                 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1739                 break;
1740         case P2P_PROV_DISC_REQ:
1741                 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1742                 break;
1743         case P2P_PROV_DISC_RESP:
1744                 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1745                 break;
1746         case P2P_DEV_DISC_REQ:
1747                 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1748                 break;
1749         case P2P_DEV_DISC_RESP:
1750                 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1751                 break;
1752         default:
1753                 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1754                         data[0]);
1755                 break;
1756         }
1757 }
1758
1759
1760 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1761                                  const u8 *sa, const u8 *bssid, const u8 *data,
1762                                  size_t len, int freq)
1763 {
1764         if (len < 1)
1765                 return;
1766
1767         switch (data[0]) {
1768         case WLAN_PA_VENDOR_SPECIFIC:
1769                 data++;
1770                 len--;
1771                 if (len < 4)
1772                         return;
1773                 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1774                         return;
1775
1776                 data += 4;
1777                 len -= 4;
1778
1779                 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1780                 break;
1781         case WLAN_PA_GAS_INITIAL_REQ:
1782                 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1783                 break;
1784         case WLAN_PA_GAS_INITIAL_RESP:
1785                 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1786                 break;
1787         case WLAN_PA_GAS_COMEBACK_REQ:
1788                 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1789                 break;
1790         case WLAN_PA_GAS_COMEBACK_RESP:
1791                 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1792                 break;
1793         }
1794 }
1795
1796
1797 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1798                    const u8 *bssid, u8 category,
1799                    const u8 *data, size_t len, int freq)
1800 {
1801         if (category == WLAN_ACTION_PUBLIC) {
1802                 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1803                 return;
1804         }
1805
1806         if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1807                 return;
1808
1809         if (len < 4)
1810                 return;
1811
1812         if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1813                 return;
1814         data += 4;
1815         len -= 4;
1816
1817         /* P2P action frame */
1818         p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1819         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1820
1821         if (len < 1)
1822                 return;
1823         switch (data[0]) {
1824         case P2P_NOA:
1825                 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1826                 /* TODO */
1827                 break;
1828         case P2P_PRESENCE_REQ:
1829                 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1830                 break;
1831         case P2P_PRESENCE_RESP:
1832                 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1833                 break;
1834         case P2P_GO_DISC_REQ:
1835                 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1836                 break;
1837         default:
1838                 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1839                 break;
1840         }
1841 }
1842
1843
1844 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1845 {
1846         struct p2p_data *p2p = eloop_ctx;
1847         if (p2p->go_neg_peer == NULL)
1848                 return;
1849         if (p2p->pending_listen_freq) {
1850                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start");
1851                 p2p->pending_listen_freq = 0;
1852         }
1853         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1854         p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1855         /*
1856          * Set new timeout to make sure a previously set one does not expire
1857          * too quickly while waiting for the GO Negotiation to complete.
1858          */
1859         p2p_set_timeout(p2p, 0, 500000);
1860         p2p_connect_send(p2p, p2p->go_neg_peer);
1861 }
1862
1863
1864 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1865 {
1866         struct p2p_data *p2p = eloop_ctx;
1867         if (p2p->invite_peer == NULL)
1868                 return;
1869         if (p2p->pending_listen_freq) {
1870                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start");
1871                 p2p->pending_listen_freq = 0;
1872         }
1873         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1874         p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
1875                         p2p->invite_dev_pw_id);
1876 }
1877
1878
1879 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1880                                        const u8 *ie, size_t ie_len)
1881 {
1882         struct p2p_message msg;
1883         struct p2p_device *dev;
1884
1885         os_memset(&msg, 0, sizeof(msg));
1886         if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1887         {
1888                 p2p_parse_free(&msg);
1889                 return; /* not a P2P probe */
1890         }
1891
1892         if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
1893             os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
1894             != 0) {
1895                 /* The Probe Request is not part of P2P Device Discovery. It is
1896                  * not known whether the source address of the frame is the P2P
1897                  * Device Address or P2P Interface Address. Do not add a new
1898                  * peer entry based on this frames.
1899                  */
1900                 p2p_parse_free(&msg);
1901                 return;
1902         }
1903
1904         dev = p2p_get_device(p2p, addr);
1905         if (dev) {
1906                 if (dev->country[0] == 0 && msg.listen_channel)
1907                         os_memcpy(dev->country, msg.listen_channel, 3);
1908                 os_get_reltime(&dev->last_seen);
1909                 p2p_parse_free(&msg);
1910                 return; /* already known */
1911         }
1912
1913         dev = p2p_create_device(p2p, addr);
1914         if (dev == NULL) {
1915                 p2p_parse_free(&msg);
1916                 return;
1917         }
1918
1919         os_get_reltime(&dev->last_seen);
1920         dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
1921
1922         if (msg.listen_channel) {
1923                 os_memcpy(dev->country, msg.listen_channel, 3);
1924                 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
1925                                                        msg.listen_channel[4]);
1926         }
1927
1928         p2p_copy_wps_info(p2p, dev, 1, &msg);
1929
1930         if (msg.wfd_subelems) {
1931                 wpabuf_free(dev->info.wfd_subelems);
1932                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
1933         }
1934
1935         p2p_parse_free(&msg);
1936
1937         p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
1938                 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
1939                 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
1940                 dev->info.group_capab, dev->info.device_name,
1941                 dev->listen_freq);
1942 }
1943
1944
1945 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
1946                                                 const u8 *addr,
1947                                                 struct p2p_message *msg)
1948 {
1949         struct p2p_device *dev;
1950
1951         dev = p2p_get_device(p2p, addr);
1952         if (dev) {
1953                 os_get_reltime(&dev->last_seen);
1954                 return dev; /* already known */
1955         }
1956
1957         dev = p2p_create_device(p2p, addr);
1958         if (dev == NULL)
1959                 return NULL;
1960
1961         p2p_add_dev_info(p2p, addr, dev, msg);
1962
1963         return dev;
1964 }
1965
1966
1967 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
1968 {
1969         if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
1970                 return 1;
1971         if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
1972             WPA_GET_BE32(&req_dev_type[2]) == 0 &&
1973             WPA_GET_BE16(&req_dev_type[6]) == 0)
1974                 return 1; /* Category match with wildcard OUI/sub-category */
1975         return 0;
1976 }
1977
1978
1979 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
1980                         size_t num_req_dev_type)
1981 {
1982         size_t i;
1983         for (i = 0; i < num_req_dev_type; i++) {
1984                 if (dev_type_match(dev_type, req_dev_type[i]))
1985                         return 1;
1986         }
1987         return 0;
1988 }
1989
1990
1991 /**
1992  * p2p_match_dev_type - Match local device type with requested type
1993  * @p2p: P2P module context from p2p_init()
1994  * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
1995  * Returns: 1 on match, 0 on mismatch
1996  *
1997  * This function can be used to match the Requested Device Type attribute in
1998  * WPS IE with the local device types for deciding whether to reply to a Probe
1999  * Request frame.
2000  */
2001 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
2002 {
2003         struct wps_parse_attr attr;
2004         size_t i;
2005
2006         if (wps_parse_msg(wps, &attr))
2007                 return 1; /* assume no Requested Device Type attributes */
2008
2009         if (attr.num_req_dev_type == 0)
2010                 return 1; /* no Requested Device Type attributes -> match */
2011
2012         if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
2013                                 attr.num_req_dev_type))
2014                 return 1; /* Own Primary Device Type matches */
2015
2016         for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) {
2017                 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
2018                                         attr.req_dev_type,
2019                                         attr.num_req_dev_type))
2020                         return 1; /* Own Secondary Device Type matches */
2021         }
2022
2023         /* No matching device type found */
2024         return 0;
2025 }
2026
2027
2028 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
2029 {
2030         struct wpabuf *buf;
2031         u8 *len;
2032         int pw_id = -1;
2033         size_t extra = 0;
2034
2035 #ifdef CONFIG_WIFI_DISPLAY
2036         if (p2p->wfd_ie_probe_resp)
2037                 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
2038 #endif /* CONFIG_WIFI_DISPLAY */
2039
2040         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2041                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2042
2043         buf = wpabuf_alloc(1000 + extra);
2044         if (buf == NULL)
2045                 return NULL;
2046
2047         if (p2p->go_neg_peer) {
2048                 /* Advertise immediate availability of WPS credential */
2049                 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
2050         }
2051
2052         if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
2053                 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
2054                 wpabuf_free(buf);
2055                 return NULL;
2056         }
2057
2058 #ifdef CONFIG_WIFI_DISPLAY
2059         if (p2p->wfd_ie_probe_resp)
2060                 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
2061 #endif /* CONFIG_WIFI_DISPLAY */
2062
2063         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2064                 wpabuf_put_buf(buf,
2065                                p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2066
2067         /* P2P IE */
2068         len = p2p_buf_add_ie_hdr(buf);
2069         p2p_buf_add_capability(buf, p2p->dev_capab &
2070                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2071         if (p2p->ext_listen_interval)
2072                 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
2073                                               p2p->ext_listen_interval);
2074         p2p_buf_add_device_info(buf, p2p, NULL);
2075         p2p_buf_update_ie_hdr(buf, len);
2076
2077         return buf;
2078 }
2079
2080
2081 static enum p2p_probe_req_status
2082 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2083                 const u8 *bssid, const u8 *ie, size_t ie_len)
2084 {
2085         struct ieee802_11_elems elems;
2086         struct wpabuf *buf;
2087         struct ieee80211_mgmt *resp;
2088         struct p2p_message msg;
2089         struct wpabuf *ies;
2090
2091         if (!p2p->in_listen || !p2p->drv_in_listen) {
2092                 /* not in Listen state - ignore Probe Request */
2093                 p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
2094                         p2p->in_listen, p2p->drv_in_listen);
2095                 return P2P_PREQ_NOT_LISTEN;
2096         }
2097
2098         if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
2099             ParseFailed) {
2100                 /* Ignore invalid Probe Request frames */
2101                 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
2102                 return P2P_PREQ_MALFORMED;
2103         }
2104
2105         if (elems.p2p == NULL) {
2106                 /* not a P2P probe - ignore it */
2107                 p2p_dbg(p2p, "Not a P2P probe - ignore it");
2108                 return P2P_PREQ_NOT_P2P;
2109         }
2110
2111         if (dst && !is_broadcast_ether_addr(dst) &&
2112             os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2113                 /* Not sent to the broadcast address or our P2P Device Address
2114                  */
2115                 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2116                         MAC2STR(dst));
2117                 return P2P_PREQ_NOT_PROCESSED;
2118         }
2119
2120         if (bssid && !is_broadcast_ether_addr(bssid)) {
2121                 /* Not sent to the Wildcard BSSID */
2122                 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2123                         MAC2STR(bssid));
2124                 return P2P_PREQ_NOT_PROCESSED;
2125         }
2126
2127         if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2128             os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2129             0) {
2130                 /* not using P2P Wildcard SSID - ignore */
2131                 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2132                 return P2P_PREQ_NOT_PROCESSED;
2133         }
2134
2135         if (supp_rates_11b_only(&elems)) {
2136                 /* Indicates support for 11b rates only */
2137                 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2138                 return P2P_PREQ_NOT_P2P;
2139         }
2140
2141         os_memset(&msg, 0, sizeof(msg));
2142         if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2143                 /* Could not parse P2P attributes */
2144                 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2145                 return P2P_PREQ_NOT_P2P;
2146         }
2147
2148         if (msg.device_id &&
2149             os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2150                 /* Device ID did not match */
2151                 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2152                         MAC2STR(msg.device_id));
2153                 p2p_parse_free(&msg);
2154                 return P2P_PREQ_NOT_PROCESSED;
2155         }
2156
2157         /* Check Requested Device Type match */
2158         if (msg.wps_attributes &&
2159             !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2160                 /* No match with Requested Device Type */
2161                 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2162                 p2p_parse_free(&msg);
2163                 return P2P_PREQ_NOT_PROCESSED;
2164         }
2165         p2p_parse_free(&msg);
2166
2167         if (!p2p->cfg->send_probe_resp) {
2168                 /* Response generated elsewhere */
2169                 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2170                 return P2P_PREQ_NOT_PROCESSED;
2171         }
2172
2173         p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2174
2175         /*
2176          * We do not really have a specific BSS that this frame is advertising,
2177          * so build a frame that has some information in valid format. This is
2178          * really only used for discovery purposes, not to learn exact BSS
2179          * parameters.
2180          */
2181         ies = p2p_build_probe_resp_ies(p2p);
2182         if (ies == NULL)
2183                 return P2P_PREQ_NOT_PROCESSED;
2184
2185         buf = wpabuf_alloc(200 + wpabuf_len(ies));
2186         if (buf == NULL) {
2187                 wpabuf_free(ies);
2188                 return P2P_PREQ_NOT_PROCESSED;
2189         }
2190
2191         resp = NULL;
2192         resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
2193
2194         resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2195                                            (WLAN_FC_STYPE_PROBE_RESP << 4));
2196         os_memcpy(resp->da, addr, ETH_ALEN);
2197         os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2198         os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2199         resp->u.probe_resp.beacon_int = host_to_le16(100);
2200         /* hardware or low-level driver will setup seq_ctrl and timestamp */
2201         resp->u.probe_resp.capab_info =
2202                 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2203                              WLAN_CAPABILITY_PRIVACY |
2204                              WLAN_CAPABILITY_SHORT_SLOT_TIME);
2205
2206         wpabuf_put_u8(buf, WLAN_EID_SSID);
2207         wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2208         wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2209
2210         wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2211         wpabuf_put_u8(buf, 8);
2212         wpabuf_put_u8(buf, (60 / 5) | 0x80);
2213         wpabuf_put_u8(buf, 90 / 5);
2214         wpabuf_put_u8(buf, (120 / 5) | 0x80);
2215         wpabuf_put_u8(buf, 180 / 5);
2216         wpabuf_put_u8(buf, (240 / 5) | 0x80);
2217         wpabuf_put_u8(buf, 360 / 5);
2218         wpabuf_put_u8(buf, 480 / 5);
2219         wpabuf_put_u8(buf, 540 / 5);
2220
2221         wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2222         wpabuf_put_u8(buf, 1);
2223         wpabuf_put_u8(buf, p2p->cfg->channel);
2224
2225         wpabuf_put_buf(buf, ies);
2226         wpabuf_free(ies);
2227
2228         p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
2229
2230         wpabuf_free(buf);
2231
2232         return P2P_PREQ_NOT_PROCESSED;
2233 }
2234
2235
2236 enum p2p_probe_req_status
2237 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2238                  const u8 *bssid, const u8 *ie, size_t ie_len)
2239 {
2240         enum p2p_probe_req_status res;
2241
2242         p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2243
2244         res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
2245
2246         if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2247             p2p->go_neg_peer &&
2248             os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2249             == 0 &&
2250             !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2251                 /* Received a Probe Request from GO Negotiation peer */
2252                 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2253                 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2254                 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2255                 return P2P_PREQ_PROCESSED;
2256         }
2257
2258         if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2259             p2p->invite_peer &&
2260             (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2261             os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2262             == 0) {
2263                 /* Received a Probe Request from Invite peer */
2264                 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2265                 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2266                 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2267                 return P2P_PREQ_PROCESSED;
2268         }
2269
2270         return res;
2271 }
2272
2273
2274 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2275                                     u8 *buf, size_t len, struct wpabuf *p2p_ie)
2276 {
2277         struct wpabuf *tmp;
2278         u8 *lpos;
2279         size_t tmplen;
2280         int res;
2281         u8 group_capab;
2282
2283         if (p2p_ie == NULL)
2284                 return 0; /* WLAN AP is not a P2P manager */
2285
2286         /*
2287          * (Re)Association Request - P2P IE
2288          * P2P Capability attribute (shall be present)
2289          * P2P Interface attribute (present if concurrent device and
2290          *      P2P Management is enabled)
2291          */
2292         tmp = wpabuf_alloc(200);
2293         if (tmp == NULL)
2294                 return -1;
2295
2296         lpos = p2p_buf_add_ie_hdr(tmp);
2297         group_capab = 0;
2298         if (p2p->num_groups > 0) {
2299                 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2300                 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2301                     (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2302                     p2p->cross_connect)
2303                         group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2304         }
2305         p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2306         if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2307             (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2308                 p2p_buf_add_p2p_interface(tmp, p2p);
2309         p2p_buf_update_ie_hdr(tmp, lpos);
2310
2311         tmplen = wpabuf_len(tmp);
2312         if (tmplen > len)
2313                 res = -1;
2314         else {
2315                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2316                 res = tmplen;
2317         }
2318         wpabuf_free(tmp);
2319
2320         return res;
2321 }
2322
2323
2324 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2325                      size_t len, int p2p_group, struct wpabuf *p2p_ie)
2326 {
2327         struct wpabuf *tmp;
2328         u8 *lpos;
2329         struct p2p_device *peer;
2330         size_t tmplen;
2331         int res;
2332         size_t extra = 0;
2333
2334         if (!p2p_group)
2335                 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2336
2337 #ifdef CONFIG_WIFI_DISPLAY
2338         if (p2p->wfd_ie_assoc_req)
2339                 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2340 #endif /* CONFIG_WIFI_DISPLAY */
2341
2342         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2343                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2344
2345         /*
2346          * (Re)Association Request - P2P IE
2347          * P2P Capability attribute (shall be present)
2348          * Extended Listen Timing (may be present)
2349          * P2P Device Info attribute (shall be present)
2350          */
2351         tmp = wpabuf_alloc(200 + extra);
2352         if (tmp == NULL)
2353                 return -1;
2354
2355 #ifdef CONFIG_WIFI_DISPLAY
2356         if (p2p->wfd_ie_assoc_req)
2357                 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2358 #endif /* CONFIG_WIFI_DISPLAY */
2359
2360         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2361                 wpabuf_put_buf(tmp,
2362                                p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2363
2364         peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2365
2366         lpos = p2p_buf_add_ie_hdr(tmp);
2367         p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2368         if (p2p->ext_listen_interval)
2369                 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2370                                               p2p->ext_listen_interval);
2371         p2p_buf_add_device_info(tmp, p2p, peer);
2372         p2p_buf_update_ie_hdr(tmp, lpos);
2373
2374         tmplen = wpabuf_len(tmp);
2375         if (tmplen > len)
2376                 res = -1;
2377         else {
2378                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2379                 res = tmplen;
2380         }
2381         wpabuf_free(tmp);
2382
2383         return res;
2384 }
2385
2386
2387 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2388 {
2389         struct wpabuf *p2p_ie;
2390         int ret;
2391
2392         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2393         if (p2p_ie == NULL)
2394                 return 0;
2395
2396         ret = p2p_attr_text(p2p_ie, buf, end);
2397         wpabuf_free(p2p_ie);
2398         return ret;
2399 }
2400
2401
2402 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2403 {
2404         struct p2p_message msg;
2405
2406         os_memset(&msg, 0, sizeof(msg));
2407         if (p2p_parse_p2p_ie(p2p_ie, &msg))
2408                 return -1;
2409
2410         if (msg.p2p_device_addr) {
2411                 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2412                 return 0;
2413         } else if (msg.device_id) {
2414                 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2415                 return 0;
2416         }
2417         return -1;
2418 }
2419
2420
2421 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2422 {
2423         struct wpabuf *p2p_ie;
2424         int ret;
2425
2426         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2427                                              P2P_IE_VENDOR_TYPE);
2428         if (p2p_ie == NULL)
2429                 return -1;
2430         ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2431         wpabuf_free(p2p_ie);
2432         return ret;
2433 }
2434
2435
2436 static void p2p_clear_go_neg(struct p2p_data *p2p)
2437 {
2438         p2p->go_neg_peer = NULL;
2439         p2p_clear_timeout(p2p);
2440         p2p_set_state(p2p, P2P_IDLE);
2441 }
2442
2443
2444 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2445 {
2446         if (p2p->go_neg_peer == NULL) {
2447                 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2448                 return; /* No pending Group Formation */
2449         }
2450
2451         if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2452             0) {
2453                 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2454                         MACSTR " (GO Negotiation peer " MACSTR ")",
2455                         MAC2STR(mac_addr),
2456                         MAC2STR(p2p->go_neg_peer->intended_addr));
2457                 return; /* Ignore unexpected peer address */
2458         }
2459
2460         p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2461                 MAC2STR(mac_addr));
2462
2463         p2p_clear_go_neg(p2p);
2464 }
2465
2466
2467 void p2p_group_formation_failed(struct p2p_data *p2p)
2468 {
2469         if (p2p->go_neg_peer == NULL) {
2470                 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2471                 return; /* No pending Group Formation */
2472         }
2473
2474         p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2475                 MAC2STR(p2p->go_neg_peer->intended_addr));
2476
2477         p2p_clear_go_neg(p2p);
2478 }
2479
2480
2481 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2482 {
2483         struct p2p_data *p2p;
2484
2485         if (cfg->max_peers < 1 ||
2486             cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
2487                 return NULL;
2488
2489         p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2490         if (p2p == NULL)
2491                 return NULL;
2492         p2p->cfg = (struct p2p_config *) (p2p + 1);
2493         os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2494         if (cfg->dev_name)
2495                 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2496         if (cfg->manufacturer)
2497                 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2498         if (cfg->model_name)
2499                 p2p->cfg->model_name = os_strdup(cfg->model_name);
2500         if (cfg->model_number)
2501                 p2p->cfg->model_number = os_strdup(cfg->model_number);
2502         if (cfg->serial_number)
2503                 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2504         if (cfg->pref_chan) {
2505                 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2506                                                 sizeof(struct p2p_channel));
2507                 if (p2p->cfg->pref_chan) {
2508                         os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2509                                   cfg->num_pref_chan *
2510                                   sizeof(struct p2p_channel));
2511                 } else
2512                         p2p->cfg->num_pref_chan = 0;
2513         }
2514
2515         p2p->min_disc_int = 1;
2516         p2p->max_disc_int = 3;
2517         p2p->max_disc_tu = -1;
2518
2519         if (os_get_random(&p2p->next_tie_breaker, 1) < 0)
2520                 p2p->next_tie_breaker = 0;
2521         p2p->next_tie_breaker &= 0x01;
2522         if (cfg->sd_request)
2523                 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2524         p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2525         if (cfg->concurrent_operations)
2526                 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2527         p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2528
2529         dl_list_init(&p2p->devices);
2530
2531         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2532                                p2p_expiration_timeout, p2p, NULL);
2533
2534         p2p->go_timeout = 100;
2535         p2p->client_timeout = 20;
2536         p2p->num_p2p_sd_queries = 0;
2537
2538         p2p_dbg(p2p, "initialized");
2539         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2540         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2541
2542         return p2p;
2543 }
2544
2545
2546 void p2p_deinit(struct p2p_data *p2p)
2547 {
2548 #ifdef CONFIG_WIFI_DISPLAY
2549         wpabuf_free(p2p->wfd_ie_beacon);
2550         wpabuf_free(p2p->wfd_ie_probe_req);
2551         wpabuf_free(p2p->wfd_ie_probe_resp);
2552         wpabuf_free(p2p->wfd_ie_assoc_req);
2553         wpabuf_free(p2p->wfd_ie_invitation);
2554         wpabuf_free(p2p->wfd_ie_prov_disc_req);
2555         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2556         wpabuf_free(p2p->wfd_ie_go_neg);
2557         wpabuf_free(p2p->wfd_dev_info);
2558         wpabuf_free(p2p->wfd_assoc_bssid);
2559         wpabuf_free(p2p->wfd_coupled_sink_info);
2560 #endif /* CONFIG_WIFI_DISPLAY */
2561
2562         eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2563         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2564         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2565         eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2566         p2p_flush(p2p);
2567         p2p_free_req_dev_types(p2p);
2568         os_free(p2p->cfg->dev_name);
2569         os_free(p2p->cfg->manufacturer);
2570         os_free(p2p->cfg->model_name);
2571         os_free(p2p->cfg->model_number);
2572         os_free(p2p->cfg->serial_number);
2573         os_free(p2p->cfg->pref_chan);
2574         os_free(p2p->groups);
2575         wpabuf_free(p2p->sd_resp);
2576         os_free(p2p->after_scan_tx);
2577         p2p_remove_wps_vendor_extensions(p2p);
2578         os_free(p2p->no_go_freq.range);
2579         os_free(p2p);
2580 }
2581
2582
2583 void p2p_flush(struct p2p_data *p2p)
2584 {
2585         struct p2p_device *dev, *prev;
2586         p2p_stop_find(p2p);
2587         dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2588                               list) {
2589                 dl_list_del(&dev->list);
2590                 p2p_device_free(p2p, dev);
2591         }
2592         p2p_free_sd_queries(p2p);
2593         os_free(p2p->after_scan_tx);
2594         p2p->after_scan_tx = NULL;
2595 }
2596
2597
2598 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2599 {
2600         struct p2p_device *dev;
2601
2602         dev = p2p_get_device(p2p, addr);
2603         if (dev == NULL)
2604                 return -1;
2605
2606         p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
2607
2608         if (p2p->go_neg_peer == dev)
2609                 p2p->go_neg_peer = NULL;
2610
2611         dev->wps_method = WPS_NOT_READY;
2612         dev->oob_pw_id = 0;
2613         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
2614         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
2615
2616         /* Check if after_scan_tx is for this peer. If so free it */
2617         if (p2p->after_scan_tx &&
2618             os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
2619                 os_free(p2p->after_scan_tx);
2620                 p2p->after_scan_tx = NULL;
2621         }
2622
2623         return 0;
2624 }
2625
2626
2627 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
2628 {
2629         os_free(p2p->cfg->dev_name);
2630         if (dev_name) {
2631                 p2p->cfg->dev_name = os_strdup(dev_name);
2632                 if (p2p->cfg->dev_name == NULL)
2633                         return -1;
2634         } else
2635                 p2p->cfg->dev_name = NULL;
2636         return 0;
2637 }
2638
2639
2640 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
2641 {
2642         os_free(p2p->cfg->manufacturer);
2643         p2p->cfg->manufacturer = NULL;
2644         if (manufacturer) {
2645                 p2p->cfg->manufacturer = os_strdup(manufacturer);
2646                 if (p2p->cfg->manufacturer == NULL)
2647                         return -1;
2648         }
2649
2650         return 0;
2651 }
2652
2653
2654 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
2655 {
2656         os_free(p2p->cfg->model_name);
2657         p2p->cfg->model_name = NULL;
2658         if (model_name) {
2659                 p2p->cfg->model_name = os_strdup(model_name);
2660                 if (p2p->cfg->model_name == NULL)
2661                         return -1;
2662         }
2663
2664         return 0;
2665 }
2666
2667
2668 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
2669 {
2670         os_free(p2p->cfg->model_number);
2671         p2p->cfg->model_number = NULL;
2672         if (model_number) {
2673                 p2p->cfg->model_number = os_strdup(model_number);
2674                 if (p2p->cfg->model_number == NULL)
2675                         return -1;
2676         }
2677
2678         return 0;
2679 }
2680
2681
2682 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
2683 {
2684         os_free(p2p->cfg->serial_number);
2685         p2p->cfg->serial_number = NULL;
2686         if (serial_number) {
2687                 p2p->cfg->serial_number = os_strdup(serial_number);
2688                 if (p2p->cfg->serial_number == NULL)
2689                         return -1;
2690         }
2691
2692         return 0;
2693 }
2694
2695
2696 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
2697 {
2698         p2p->cfg->config_methods = config_methods;
2699 }
2700
2701
2702 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
2703 {
2704         os_memcpy(p2p->cfg->uuid, uuid, 16);
2705 }
2706
2707
2708 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
2709 {
2710         os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
2711         return 0;
2712 }
2713
2714
2715 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
2716                           size_t num_dev_types)
2717 {
2718         if (num_dev_types > P2P_SEC_DEVICE_TYPES)
2719                 num_dev_types = P2P_SEC_DEVICE_TYPES;
2720         p2p->cfg->num_sec_dev_types = num_dev_types;
2721         os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
2722         return 0;
2723 }
2724
2725
2726 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
2727 {
2728         int i;
2729
2730         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2731                 wpabuf_free(p2p->wps_vendor_ext[i]);
2732                 p2p->wps_vendor_ext[i] = NULL;
2733         }
2734 }
2735
2736
2737 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
2738                                  const struct wpabuf *vendor_ext)
2739 {
2740         int i;
2741
2742         if (vendor_ext == NULL)
2743                 return -1;
2744
2745         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
2746                 if (p2p->wps_vendor_ext[i] == NULL)
2747                         break;
2748         }
2749         if (i >= P2P_MAX_WPS_VENDOR_EXT)
2750                 return -1;
2751
2752         p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
2753         if (p2p->wps_vendor_ext[i] == NULL)
2754                 return -1;
2755
2756         return 0;
2757 }
2758
2759
2760 int p2p_set_country(struct p2p_data *p2p, const char *country)
2761 {
2762         os_memcpy(p2p->cfg->country, country, 3);
2763         return 0;
2764 }
2765
2766
2767 static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev)
2768 {
2769         if (dev->sd_pending_bcast_queries == 0) {
2770                 /* Initialize with total number of registered broadcast
2771                  * SD queries. */
2772                 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
2773         }
2774
2775         if (p2p_start_sd(p2p, dev) == 0)
2776                 return 1;
2777
2778         if (dev->req_config_methods &&
2779             !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
2780                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2781                         MACSTR " (config methods 0x%x)",
2782                         MAC2STR(dev->info.p2p_device_addr),
2783                         dev->req_config_methods);
2784                 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
2785                         return 1;
2786         }
2787
2788         return 0;
2789 }
2790
2791
2792 void p2p_continue_find(struct p2p_data *p2p)
2793 {
2794         struct p2p_device *dev;
2795         int found;
2796
2797         p2p_set_state(p2p, P2P_SEARCH);
2798
2799         /* Continue from the device following the last iteration */
2800         found = 0;
2801         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2802                 if (dev == p2p->last_p2p_find_oper) {
2803                         found = 1;
2804                         continue;
2805                 }
2806                 if (!found)
2807                         continue;
2808                 if (p2p_pre_find_operation(p2p, dev) > 0) {
2809                         p2p->last_p2p_find_oper = dev;
2810                         return;
2811                 }
2812         }
2813
2814         /*
2815          * Wrap around to the beginning of the list and continue until the last
2816          * iteration device.
2817          */
2818         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2819                 if (p2p_pre_find_operation(p2p, dev) > 0) {
2820                         p2p->last_p2p_find_oper = dev;
2821                         return;
2822                 }
2823                 if (dev == p2p->last_p2p_find_oper)
2824                         break;
2825         }
2826
2827         p2p_listen_in_find(p2p, 1);
2828 }
2829
2830
2831 static void p2p_sd_cb(struct p2p_data *p2p, int success)
2832 {
2833         p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
2834                 success);
2835         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2836
2837         if (!success) {
2838                 p2p->sd_peer = NULL;
2839                 p2p_continue_find(p2p);
2840                 return;
2841         }
2842
2843         if (p2p->sd_peer == NULL) {
2844                 p2p_dbg(p2p, "No SD peer entry known");
2845                 p2p_continue_find(p2p);
2846                 return;
2847         }
2848
2849         if (p2p->sd_query->for_all_peers) {
2850                 /* Update the pending broadcast SD query count for this device
2851                  */
2852                 p2p->sd_peer->sd_pending_bcast_queries--;
2853
2854                 /*
2855                  * If there are no pending broadcast queries for this device,
2856                  * mark it as done (-1).
2857                  */
2858                 if (p2p->sd_peer->sd_pending_bcast_queries == 0)
2859                         p2p->sd_peer->sd_pending_bcast_queries = -1;
2860         }
2861
2862         /* Wait for response from the peer */
2863         p2p_set_state(p2p, P2P_SD_DURING_FIND);
2864         p2p_set_timeout(p2p, 0, 200000);
2865 }
2866
2867
2868 /**
2869  * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
2870  * @p2p: P2P module context from p2p_init()
2871  */
2872 static void p2p_retry_pd(struct p2p_data *p2p)
2873 {
2874         struct p2p_device *dev;
2875
2876         if (p2p->state != P2P_IDLE)
2877                 return;
2878
2879         /*
2880          * Retry the prov disc req attempt only for the peer that the user had
2881          * requested.
2882          */
2883
2884         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
2885                 if (os_memcmp(p2p->pending_pd_devaddr,
2886                               dev->info.p2p_device_addr, ETH_ALEN) != 0)
2887                         continue;
2888                 if (!dev->req_config_methods)
2889                         continue;
2890
2891                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
2892                         MACSTR " (config methods 0x%x)",
2893                         MAC2STR(dev->info.p2p_device_addr),
2894                         dev->req_config_methods);
2895                 p2p_send_prov_disc_req(p2p, dev,
2896                                        dev->flags & P2P_DEV_PD_FOR_JOIN,
2897                                        p2p->pd_force_freq);
2898                 return;
2899         }
2900 }
2901
2902
2903 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
2904 {
2905         p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
2906                 success);
2907
2908         /*
2909          * Postpone resetting the pending action state till after we actually
2910          * time out. This allows us to take some action like notifying any
2911          * interested parties about no response to the request.
2912          *
2913          * When the timer (below) goes off we check in IDLE, SEARCH, or
2914          * LISTEN_ONLY state, which are the only allowed states to issue a PD
2915          * requests in, if this was still pending and then raise notification.
2916          */
2917
2918         if (!success) {
2919                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2920
2921                 if (p2p->user_initiated_pd &&
2922                     (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
2923                 {
2924                         /* Retry request from timeout to avoid busy loops */
2925                         p2p->pending_action_state = P2P_PENDING_PD;
2926                         p2p_set_timeout(p2p, 0, 50000);
2927                 } else if (p2p->state != P2P_IDLE)
2928                         p2p_continue_find(p2p);
2929                 else if (p2p->user_initiated_pd) {
2930                         p2p->pending_action_state = P2P_PENDING_PD;
2931                         p2p_set_timeout(p2p, 0, 300000);
2932                 }
2933                 return;
2934         }
2935
2936         /*
2937          * This postponing, of resetting pending_action_state, needs to be
2938          * done only for user initiated PD requests and not internal ones.
2939          */
2940         if (p2p->user_initiated_pd)
2941                 p2p->pending_action_state = P2P_PENDING_PD;
2942         else
2943                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
2944
2945         /* Wait for response from the peer */
2946         if (p2p->state == P2P_SEARCH)
2947                 p2p_set_state(p2p, P2P_PD_DURING_FIND);
2948         p2p_set_timeout(p2p, 0, 200000);
2949 }
2950
2951
2952 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
2953                          struct os_reltime *rx_time, int level, const u8 *ies,
2954                          size_t ies_len)
2955 {
2956         if (os_reltime_before(rx_time, &p2p->find_start)) {
2957                 /*
2958                  * The driver may have cached (e.g., in cfg80211 BSS table) the
2959                  * scan results for relatively long time. To avoid reporting
2960                  * stale information, update P2P peers only based on results
2961                  * that have based on frames received after the last p2p_find
2962                  * operation was started.
2963                  */
2964                 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
2965                         " (rx_time=%u.%06u)",
2966                         MAC2STR(bssid), (unsigned int) rx_time->sec,
2967                         (unsigned int) rx_time->usec);
2968                 return 0;
2969         }
2970
2971         p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
2972
2973         return 0;
2974 }
2975
2976
2977 void p2p_scan_res_handled(struct p2p_data *p2p)
2978 {
2979         if (!p2p->p2p_scan_running) {
2980                 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
2981         }
2982         p2p->p2p_scan_running = 0;
2983         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2984
2985         if (p2p_run_after_scan(p2p))
2986                 return;
2987         if (p2p->state == P2P_SEARCH)
2988                 p2p_continue_find(p2p);
2989 }
2990
2991
2992 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
2993 {
2994         u8 *len;
2995
2996 #ifdef CONFIG_WIFI_DISPLAY
2997         if (p2p->wfd_ie_probe_req)
2998                 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
2999 #endif /* CONFIG_WIFI_DISPLAY */
3000
3001         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3002                 wpabuf_put_buf(ies,
3003                                p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3004
3005         len = p2p_buf_add_ie_hdr(ies);
3006         p2p_buf_add_capability(ies, p2p->dev_capab &
3007                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
3008         if (dev_id)
3009                 p2p_buf_add_device_id(ies, dev_id);
3010         if (p2p->cfg->reg_class && p2p->cfg->channel)
3011                 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
3012                                            p2p->cfg->reg_class,
3013                                            p2p->cfg->channel);
3014         if (p2p->ext_listen_interval)
3015                 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
3016                                               p2p->ext_listen_interval);
3017         /* TODO: p2p_buf_add_operating_channel() if GO */
3018         p2p_buf_update_ie_hdr(ies, len);
3019 }
3020
3021
3022 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
3023 {
3024         size_t len = 100;
3025
3026 #ifdef CONFIG_WIFI_DISPLAY
3027         if (p2p && p2p->wfd_ie_probe_req)
3028                 len += wpabuf_len(p2p->wfd_ie_probe_req);
3029 #endif /* CONFIG_WIFI_DISPLAY */
3030
3031         if (p2p && p2p->vendor_elem &&
3032             p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3033                 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3034
3035         return len;
3036 }
3037
3038
3039 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
3040 {
3041         return p2p_attr_text(p2p_ie, buf, end);
3042 }
3043
3044
3045 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
3046 {
3047         struct p2p_device *dev = p2p->go_neg_peer;
3048         int timeout;
3049
3050         p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
3051
3052         if (dev == NULL) {
3053                 p2p_dbg(p2p, "No pending GO Negotiation");
3054                 return;
3055         }
3056
3057         if (success) {
3058                 if (dev->flags & P2P_DEV_USER_REJECTED) {
3059                         p2p_set_state(p2p, P2P_IDLE);
3060                         return;
3061                 }
3062         } else if (dev->go_neg_req_sent) {
3063                 /* Cancel the increment from p2p_connect_send() on failure */
3064                 dev->go_neg_req_sent--;
3065         }
3066
3067         if (!success &&
3068             (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
3069             !is_zero_ether_addr(dev->member_in_go_dev)) {
3070                 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
3071                         MAC2STR(dev->info.p2p_device_addr));
3072                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3073                 p2p_send_dev_disc_req(p2p, dev);
3074                 return;
3075         }
3076
3077         /*
3078          * Use P2P find, if needed, to find the other device from its listen
3079          * channel.
3080          */
3081         p2p_set_state(p2p, P2P_CONNECT);
3082         timeout = success ? 500000 : 100000;
3083         if (!success && p2p->go_neg_peer &&
3084             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
3085                 unsigned int r;
3086                 /*
3087                  * Peer is expected to wait our response and we will skip the
3088                  * listen phase. Add some randomness to the wait time here to
3089                  * make it less likely to hit cases where we could end up in
3090                  * sync with peer not listening.
3091                  */
3092                 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
3093                         r = 0;
3094                 timeout += r % 100000;
3095         }
3096         p2p_set_timeout(p2p, 0, timeout);
3097 }
3098
3099
3100 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
3101 {
3102         p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
3103                 success);
3104         if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
3105                 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
3106                 return;
3107         }
3108         p2p_set_state(p2p, P2P_CONNECT);
3109         p2p_set_timeout(p2p, 0, 500000);
3110 }
3111
3112
3113 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
3114                                        const u8 *addr)
3115 {
3116         p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
3117         if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
3118                 p2p_go_neg_failed(p2p, p2p->go_neg_peer,
3119                                   p2p->go_neg_peer->status);
3120         } else if (success) {
3121                 struct p2p_device *dev;
3122                 dev = p2p_get_device(p2p, addr);
3123                 if (dev &&
3124                     dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
3125                         dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
3126         }
3127 }
3128
3129
3130 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
3131                                enum p2p_send_action_result result)
3132 {
3133         struct p2p_device *dev;
3134
3135         p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
3136         if (result == P2P_SEND_ACTION_FAILED) {
3137                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3138                 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3139                 return;
3140         }
3141
3142         dev = p2p->go_neg_peer;
3143
3144         if (result == P2P_SEND_ACTION_NO_ACK) {
3145                 /*
3146                  * Retry GO Negotiation Confirmation
3147                  * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
3148                  * ACK for confirmation.
3149                  */
3150                 if (dev && dev->go_neg_conf &&
3151                     dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
3152                         p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
3153                                 dev->go_neg_conf_sent);
3154                         p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
3155                         if (p2p_send_action(p2p, dev->go_neg_conf_freq,
3156                                             dev->info.p2p_device_addr,
3157                                             p2p->cfg->dev_addr,
3158                                             dev->info.p2p_device_addr,
3159                                             wpabuf_head(dev->go_neg_conf),
3160                                             wpabuf_len(dev->go_neg_conf), 0) >=
3161                             0) {
3162                                 dev->go_neg_conf_sent++;
3163                                 return;
3164                         }
3165                         p2p_dbg(p2p, "Failed to re-send Action frame");
3166
3167                         /*
3168                          * Continue with the assumption that the first attempt
3169                          * went through and just the ACK frame was lost.
3170                          */
3171                 }
3172
3173                 /*
3174                  * It looks like the TX status for GO Negotiation Confirm is
3175                  * often showing failure even when the peer has actually
3176                  * received the frame. Since the peer may change channels
3177                  * immediately after having received the frame, we may not see
3178                  * an Ack for retries, so just dropping a single frame may
3179                  * trigger this. To allow the group formation to succeed if the
3180                  * peer did indeed receive the frame, continue regardless of
3181                  * the TX status.
3182                  */
3183                 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
3184         }
3185
3186         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3187
3188         if (dev == NULL)
3189                 return;
3190
3191         p2p_go_complete(p2p, dev);
3192 }
3193
3194
3195 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3196                         const u8 *src, const u8 *bssid,
3197                         enum p2p_send_action_result result)
3198 {
3199         enum p2p_pending_action_state state;
3200         int success;
3201
3202         p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
3203                 " src=" MACSTR " bssid=" MACSTR " result=%d",
3204                 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
3205                 MAC2STR(bssid), result);
3206         success = result == P2P_SEND_ACTION_SUCCESS;
3207         state = p2p->pending_action_state;
3208         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3209         switch (state) {
3210         case P2P_NO_PENDING_ACTION:
3211                 if (p2p->send_action_in_progress) {
3212                         p2p->send_action_in_progress = 0;
3213                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3214                 }
3215                 if (p2p->after_scan_tx_in_progress) {
3216                         p2p->after_scan_tx_in_progress = 0;
3217                         if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
3218                             p2p_run_after_scan(p2p))
3219                                 break;
3220                         if (p2p->state == P2P_SEARCH) {
3221                                 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
3222                                 p2p_continue_find(p2p);
3223                         }
3224                 }
3225                 break;
3226         case P2P_PENDING_GO_NEG_REQUEST:
3227                 p2p_go_neg_req_cb(p2p, success);
3228                 break;
3229         case P2P_PENDING_GO_NEG_RESPONSE:
3230                 p2p_go_neg_resp_cb(p2p, success);
3231                 break;
3232         case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3233                 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3234                 break;
3235         case P2P_PENDING_GO_NEG_CONFIRM:
3236                 p2p_go_neg_conf_cb(p2p, result);
3237                 break;
3238         case P2P_PENDING_SD:
3239                 p2p_sd_cb(p2p, success);
3240                 break;
3241         case P2P_PENDING_PD:
3242                 p2p_prov_disc_cb(p2p, success);
3243                 break;
3244         case P2P_PENDING_INVITATION_REQUEST:
3245                 p2p_invitation_req_cb(p2p, success);
3246                 break;
3247         case P2P_PENDING_INVITATION_RESPONSE:
3248                 p2p_invitation_resp_cb(p2p, success);
3249                 break;
3250         case P2P_PENDING_DEV_DISC_REQUEST:
3251                 p2p_dev_disc_req_cb(p2p, success);
3252                 break;
3253         case P2P_PENDING_DEV_DISC_RESPONSE:
3254                 p2p_dev_disc_resp_cb(p2p, success);
3255                 break;
3256         case P2P_PENDING_GO_DISC_REQ:
3257                 p2p_go_disc_req_cb(p2p, success);
3258                 break;
3259         }
3260
3261         p2p->after_scan_tx_in_progress = 0;
3262 }
3263
3264
3265 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3266                    unsigned int duration)
3267 {
3268         if (freq == p2p->pending_client_disc_freq) {
3269                 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3270                 p2p->pending_client_disc_freq = 0;
3271                 return;
3272         }
3273
3274         if (freq != p2p->pending_listen_freq) {
3275                 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3276                         freq, duration, p2p->pending_listen_freq);
3277                 return;
3278         }
3279
3280         p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3281                 p2p->pending_listen_sec, p2p->pending_listen_usec,
3282                 p2p->pending_listen_freq);
3283         p2p->in_listen = 1;
3284         p2p->drv_in_listen = freq;
3285         if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3286                 /*
3287                  * Add 20 msec extra wait to avoid race condition with driver
3288                  * remain-on-channel end event, i.e., give driver more time to
3289                  * complete the operation before our timeout expires.
3290                  */
3291                 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3292                                 p2p->pending_listen_usec + 20000);
3293         }
3294
3295         p2p->pending_listen_freq = 0;
3296 }
3297
3298
3299 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3300 {
3301         p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3302         p2p->drv_in_listen = 0;
3303         if (p2p->in_listen)
3304                 return 0; /* Internal timeout will trigger the next step */
3305
3306         if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3307                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3308                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3309                         p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3310                         return 0;
3311                 }
3312
3313                 p2p_set_state(p2p, P2P_CONNECT);
3314                 p2p_connect_send(p2p, p2p->go_neg_peer);
3315                 return 1;
3316         } else if (p2p->state == P2P_SEARCH) {
3317                 if (p2p->p2p_scan_running) {
3318                          /*
3319                           * Search is already in progress. This can happen if
3320                           * an Action frame RX is reported immediately after
3321                           * the end of a remain-on-channel operation and the
3322                           * response frame to that is sent using an offchannel
3323                           * operation while in p2p_find. Avoid an attempt to
3324                           * restart a scan here.
3325                           */
3326                         p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3327                         return 1;
3328                 }
3329                 if (p2p->pending_listen_freq) {
3330                         /*
3331                          * Better wait a bit if the driver is unable to start
3332                          * offchannel operation for some reason. p2p_search()
3333                          * will be started from internal timeout.
3334                          */
3335                         p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3336                         p2p_set_timeout(p2p, 0, 100000);
3337                         return 1;
3338                 }
3339                 if (p2p->search_delay) {
3340                         p2p_dbg(p2p, "Delay search operation by %u ms",
3341                                 p2p->search_delay);
3342                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3343                                         (p2p->search_delay % 1000) * 1000);
3344                         return 1;
3345                 }
3346                 p2p_search(p2p);
3347                 return 1;
3348         }
3349
3350         return 0;
3351 }
3352
3353
3354 static void p2p_timeout_connect(struct p2p_data *p2p)
3355 {
3356         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3357         if (p2p->go_neg_peer &&
3358             (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3359                 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3360                 p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3361                 return;
3362         }
3363         if (p2p->go_neg_peer &&
3364             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3365             p2p->go_neg_peer->connect_reqs < 120) {
3366                 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3367                 p2p_connect_send(p2p, p2p->go_neg_peer);
3368                 return;
3369         }
3370         if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3371                 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3372                 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3373                 p2p_set_timeout(p2p, 0, 30000);
3374                 return;
3375         }
3376         p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3377         p2p_listen_in_find(p2p, 0);
3378 }
3379
3380
3381 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3382 {
3383         if (p2p->go_neg_peer) {
3384                 if (p2p->drv_in_listen) {
3385                         p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3386                         return;
3387                 }
3388
3389                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3390                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3391                         p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
3392                         return;
3393                 }
3394
3395                 p2p_set_state(p2p, P2P_CONNECT);
3396                 p2p_connect_send(p2p, p2p->go_neg_peer);
3397         } else
3398                 p2p_set_state(p2p, P2P_IDLE);
3399 }
3400
3401
3402 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3403 {
3404         p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3405
3406         if (p2p->cfg->is_concurrent_session_active &&
3407             p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3408                 p2p_set_timeout(p2p, 0, 500000);
3409         else
3410                 p2p_set_timeout(p2p, 0, 200000);
3411 }
3412
3413
3414 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3415 {
3416         struct p2p_device *dev = p2p->go_neg_peer;
3417         struct os_reltime now;
3418
3419         if (dev == NULL) {
3420                 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3421                 return;
3422         }
3423
3424         os_get_reltime(&now);
3425         if (os_reltime_expired(&now, &dev->go_neg_wait_started, 120)) {
3426                 p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation");
3427                 p2p_go_neg_failed(p2p, dev, -1);
3428                 return;
3429         }
3430
3431         p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3432         p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3433         p2p_listen_in_find(p2p, 0);
3434 }
3435
3436
3437 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3438 {
3439         p2p_dbg(p2p, "Service Discovery Query timeout");
3440         if (p2p->sd_peer) {
3441                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3442                 p2p->sd_peer = NULL;
3443         }
3444         p2p_continue_find(p2p);
3445 }
3446
3447
3448 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3449 {
3450         p2p_dbg(p2p, "Provision Discovery Request timeout");
3451         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3452         p2p_continue_find(p2p);
3453 }
3454
3455
3456 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3457 {
3458         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3459
3460         /*
3461          * For user initiated PD requests that we have not gotten any responses
3462          * for while in IDLE state, we retry them a couple of times before
3463          * giving up.
3464          */
3465         if (!p2p->user_initiated_pd)
3466                 return;
3467
3468         p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3469
3470         if (p2p->pd_retries) {
3471                 p2p->pd_retries--;
3472                 p2p_retry_pd(p2p);
3473         } else {
3474                 struct p2p_device *dev;
3475                 int for_join = 0;
3476
3477                 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3478                         if (os_memcmp(p2p->pending_pd_devaddr,
3479                                       dev->info.p2p_device_addr, ETH_ALEN) != 0)
3480                                 continue;
3481                         if (dev->req_config_methods &&
3482                             (dev->flags & P2P_DEV_PD_FOR_JOIN))
3483                                 for_join = 1;
3484                 }
3485
3486                 if (p2p->cfg->prov_disc_fail)
3487                         p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3488                                                  p2p->pending_pd_devaddr,
3489                                                  for_join ?
3490                                                  P2P_PROV_DISC_TIMEOUT_JOIN :
3491                                                  P2P_PROV_DISC_TIMEOUT);
3492                 p2p_reset_pending_pd(p2p);
3493         }
3494 }
3495
3496
3497 static void p2p_timeout_invite(struct p2p_data *p2p)
3498 {
3499         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3500         p2p_set_state(p2p, P2P_INVITE_LISTEN);
3501         if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3502                 /*
3503                  * Better remain on operating channel instead of listen channel
3504                  * when running a group.
3505                  */
3506                 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
3507                 p2p_set_timeout(p2p, 0, 100000);
3508                 return;
3509         }
3510         p2p_listen_in_find(p2p, 0);
3511 }
3512
3513
3514 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3515 {
3516         if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3517                 p2p_set_state(p2p, P2P_INVITE);
3518                 p2p_invite_send(p2p, p2p->invite_peer,
3519                                 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
3520         } else {
3521                 if (p2p->invite_peer) {
3522                         p2p_dbg(p2p, "Invitation Request retry limit reached");
3523                         if (p2p->cfg->invitation_result)
3524                                 p2p->cfg->invitation_result(
3525                                         p2p->cfg->cb_ctx, -1, NULL, NULL,
3526                                         p2p->invite_peer->info.p2p_device_addr,
3527                                         0, 0);
3528                 }
3529                 p2p_set_state(p2p, P2P_IDLE);
3530         }
3531 }
3532
3533
3534 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3535 {
3536         struct p2p_data *p2p = eloop_ctx;
3537
3538         p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
3539
3540         p2p->in_listen = 0;
3541
3542         switch (p2p->state) {
3543         case P2P_IDLE:
3544                 /* Check if we timed out waiting for PD req */
3545                 if (p2p->pending_action_state == P2P_PENDING_PD)
3546                         p2p_timeout_prov_disc_req(p2p);
3547                 break;
3548         case P2P_SEARCH:
3549                 /* Check if we timed out waiting for PD req */
3550                 if (p2p->pending_action_state == P2P_PENDING_PD)
3551                         p2p_timeout_prov_disc_req(p2p);
3552                 if (p2p->search_delay && !p2p->in_search_delay) {
3553                         p2p_dbg(p2p, "Delay search operation by %u ms",
3554                                 p2p->search_delay);
3555                         p2p->in_search_delay = 1;
3556                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3557                                         (p2p->search_delay % 1000) * 1000);
3558                         break;
3559                 }
3560                 p2p->in_search_delay = 0;
3561                 p2p_search(p2p);
3562                 break;
3563         case P2P_CONNECT:
3564                 p2p_timeout_connect(p2p);
3565                 break;
3566         case P2P_CONNECT_LISTEN:
3567                 p2p_timeout_connect_listen(p2p);
3568                 break;
3569         case P2P_GO_NEG:
3570                 break;
3571         case P2P_LISTEN_ONLY:
3572                 /* Check if we timed out waiting for PD req */
3573                 if (p2p->pending_action_state == P2P_PENDING_PD)
3574                         p2p_timeout_prov_disc_req(p2p);
3575
3576                 if (p2p->ext_listen_only) {
3577                         p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
3578                         p2p->ext_listen_only = 0;
3579                         p2p_set_state(p2p, P2P_IDLE);
3580                 }
3581                 break;
3582         case P2P_WAIT_PEER_CONNECT:
3583                 p2p_timeout_wait_peer_connect(p2p);
3584                 break;
3585         case P2P_WAIT_PEER_IDLE:
3586                 p2p_timeout_wait_peer_idle(p2p);
3587                 break;
3588         case P2P_SD_DURING_FIND:
3589                 p2p_timeout_sd_during_find(p2p);
3590                 break;
3591         case P2P_PROVISIONING:
3592                 break;
3593         case P2P_PD_DURING_FIND:
3594                 p2p_timeout_prov_disc_during_find(p2p);
3595                 break;
3596         case P2P_INVITE:
3597                 p2p_timeout_invite(p2p);
3598                 break;
3599         case P2P_INVITE_LISTEN:
3600                 p2p_timeout_invite_listen(p2p);
3601                 break;
3602         }
3603 }
3604
3605
3606 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
3607 {
3608         struct p2p_device *dev;
3609
3610         dev = p2p_get_device(p2p, peer_addr);
3611         p2p_dbg(p2p, "Local request to reject connection attempts by peer "
3612                 MACSTR, MAC2STR(peer_addr));
3613         if (dev == NULL) {
3614                 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
3615                 return -1;
3616         }
3617         dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
3618         dev->flags |= P2P_DEV_USER_REJECTED;
3619         return 0;
3620 }
3621
3622
3623 const char * p2p_wps_method_text(enum p2p_wps_method method)
3624 {
3625         switch (method) {
3626         case WPS_NOT_READY:
3627                 return "not-ready";
3628         case WPS_PIN_DISPLAY:
3629                 return "Display";
3630         case WPS_PIN_KEYPAD:
3631                 return "Keypad";
3632         case WPS_PBC:
3633                 return "PBC";
3634         case WPS_NFC:
3635                 return "NFC";
3636         }
3637
3638         return "??";
3639 }
3640
3641
3642 static const char * p2p_go_state_text(enum p2p_go_state go_state)
3643 {
3644         switch (go_state) {
3645         case UNKNOWN_GO:
3646                 return "unknown";
3647         case LOCAL_GO:
3648                 return "local";
3649         case  REMOTE_GO:
3650                 return "remote";
3651         }
3652
3653         return "??";
3654 }
3655
3656
3657 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
3658                                                const u8 *addr, int next)
3659 {
3660         struct p2p_device *dev;
3661
3662         if (addr)
3663                 dev = p2p_get_device(p2p, addr);
3664         else
3665                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
3666
3667         if (dev && next) {
3668                 dev = dl_list_first(&dev->list, struct p2p_device, list);
3669                 if (&dev->list == &p2p->devices)
3670                         dev = NULL;
3671         }
3672
3673         if (dev == NULL)
3674                 return NULL;
3675
3676         return &dev->info;
3677 }
3678
3679
3680 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
3681                           char *buf, size_t buflen)
3682 {
3683         struct p2p_device *dev;
3684         int res;
3685         char *pos, *end;
3686         struct os_reltime now;
3687
3688         if (info == NULL)
3689                 return -1;
3690
3691         dev = (struct p2p_device *) (((u8 *) info) -
3692                                      offsetof(struct p2p_device, info));
3693
3694         pos = buf;
3695         end = buf + buflen;
3696
3697         os_get_reltime(&now);
3698         res = os_snprintf(pos, end - pos,
3699                           "age=%d\n"
3700                           "listen_freq=%d\n"
3701                           "wps_method=%s\n"
3702                           "interface_addr=" MACSTR "\n"
3703                           "member_in_go_dev=" MACSTR "\n"
3704                           "member_in_go_iface=" MACSTR "\n"
3705                           "go_neg_req_sent=%d\n"
3706                           "go_state=%s\n"
3707                           "dialog_token=%u\n"
3708                           "intended_addr=" MACSTR "\n"
3709                           "country=%c%c\n"
3710                           "oper_freq=%d\n"
3711                           "req_config_methods=0x%x\n"
3712                           "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
3713                           "status=%d\n"
3714                           "invitation_reqs=%u\n",
3715                           (int) (now.sec - dev->last_seen.sec),
3716                           dev->listen_freq,
3717                           p2p_wps_method_text(dev->wps_method),
3718                           MAC2STR(dev->interface_addr),
3719                           MAC2STR(dev->member_in_go_dev),
3720                           MAC2STR(dev->member_in_go_iface),
3721                           dev->go_neg_req_sent,
3722                           p2p_go_state_text(dev->go_state),
3723                           dev->dialog_token,
3724                           MAC2STR(dev->intended_addr),
3725                           dev->country[0] ? dev->country[0] : '_',
3726                           dev->country[1] ? dev->country[1] : '_',
3727                           dev->oper_freq,
3728                           dev->req_config_methods,
3729                           dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
3730                           "[PROBE_REQ_ONLY]" : "",
3731                           dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
3732                           dev->flags & P2P_DEV_NOT_YET_READY ?
3733                           "[NOT_YET_READY]" : "",
3734                           dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
3735                           "[PD_PEER_DISPLAY]" : "",
3736                           dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
3737                           "[PD_PEER_KEYPAD]" : "",
3738                           dev->flags & P2P_DEV_USER_REJECTED ?
3739                           "[USER_REJECTED]" : "",
3740                           dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
3741                           "[PEER_WAITING_RESPONSE]" : "",
3742                           dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
3743                           "[PREFER_PERSISTENT_GROUP]" : "",
3744                           dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
3745                           "[WAIT_GO_NEG_RESPONSE]" : "",
3746                           dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
3747                           "[WAIT_GO_NEG_CONFIRM]" : "",
3748                           dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
3749                           "[GROUP_CLIENT_ONLY]" : "",
3750                           dev->flags & P2P_DEV_FORCE_FREQ ?
3751                           "[FORCE_FREQ]" : "",
3752                           dev->flags & P2P_DEV_PD_FOR_JOIN ?
3753                           "[PD_FOR_JOIN]" : "",
3754                           dev->status,
3755                           dev->invitation_reqs);
3756         if (res < 0 || res >= end - pos)
3757                 return pos - buf;
3758         pos += res;
3759
3760         if (dev->ext_listen_period) {
3761                 res = os_snprintf(pos, end - pos,
3762                                   "ext_listen_period=%u\n"
3763                                   "ext_listen_interval=%u\n",
3764                                   dev->ext_listen_period,
3765                                   dev->ext_listen_interval);
3766                 if (res < 0 || res >= end - pos)
3767                         return pos - buf;
3768                 pos += res;
3769         }
3770
3771         if (dev->oper_ssid_len) {
3772                 res = os_snprintf(pos, end - pos,
3773                                   "oper_ssid=%s\n",
3774                                   wpa_ssid_txt(dev->oper_ssid,
3775                                                dev->oper_ssid_len));
3776                 if (res < 0 || res >= end - pos)
3777                         return pos - buf;
3778                 pos += res;
3779         }
3780
3781 #ifdef CONFIG_WIFI_DISPLAY
3782         if (dev->info.wfd_subelems) {
3783                 res = os_snprintf(pos, end - pos, "wfd_subelems=");
3784                 if (res < 0 || res >= end - pos)
3785                         return pos - buf;
3786                 pos += res;
3787
3788                 pos += wpa_snprintf_hex(pos, end - pos,
3789                                         wpabuf_head(dev->info.wfd_subelems),
3790                                         wpabuf_len(dev->info.wfd_subelems));
3791
3792                 res = os_snprintf(pos, end - pos, "\n");
3793                 if (res < 0 || res >= end - pos)
3794                         return pos - buf;
3795                 pos += res;
3796         }
3797 #endif /* CONFIG_WIFI_DISPLAY */
3798
3799         return pos - buf;
3800 }
3801
3802
3803 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
3804 {
3805         return p2p_get_device(p2p, addr) != NULL;
3806 }
3807
3808
3809 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
3810 {
3811         if (enabled) {
3812                 p2p_dbg(p2p, "Client discoverability enabled");
3813                 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3814         } else {
3815                 p2p_dbg(p2p, "Client discoverability disabled");
3816                 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3817         }
3818 }
3819
3820
3821 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
3822                                               u32 duration2, u32 interval2)
3823 {
3824         struct wpabuf *req;
3825         struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
3826         u8 *len;
3827
3828         req = wpabuf_alloc(100);
3829         if (req == NULL)
3830                 return NULL;
3831
3832         if (duration1 || interval1) {
3833                 os_memset(&desc1, 0, sizeof(desc1));
3834                 desc1.count_type = 1;
3835                 desc1.duration = duration1;
3836                 desc1.interval = interval1;
3837                 ptr1 = &desc1;
3838
3839                 if (duration2 || interval2) {
3840                         os_memset(&desc2, 0, sizeof(desc2));
3841                         desc2.count_type = 2;
3842                         desc2.duration = duration2;
3843                         desc2.interval = interval2;
3844                         ptr2 = &desc2;
3845                 }
3846         }
3847
3848         p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
3849         len = p2p_buf_add_ie_hdr(req);
3850         p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
3851         p2p_buf_update_ie_hdr(req, len);
3852
3853         return req;
3854 }
3855
3856
3857 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
3858                      const u8 *own_interface_addr, unsigned int freq,
3859                      u32 duration1, u32 interval1, u32 duration2,
3860                      u32 interval2)
3861 {
3862         struct wpabuf *req;
3863
3864         p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
3865                 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
3866                 "dur2=%u int2=%u",
3867                 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
3868                 freq, duration1, interval1, duration2, interval2);
3869
3870         req = p2p_build_presence_req(duration1, interval1, duration2,
3871                                      interval2);
3872         if (req == NULL)
3873                 return -1;
3874
3875         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3876         if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
3877                             go_interface_addr,
3878                             wpabuf_head(req), wpabuf_len(req), 200) < 0) {
3879                 p2p_dbg(p2p, "Failed to send Action frame");
3880         }
3881         wpabuf_free(req);
3882
3883         return 0;
3884 }
3885
3886
3887 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
3888                                                size_t noa_len, u8 dialog_token)
3889 {
3890         struct wpabuf *resp;
3891         u8 *len;
3892
3893         resp = wpabuf_alloc(100 + noa_len);
3894         if (resp == NULL)
3895                 return NULL;
3896
3897         p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
3898         len = p2p_buf_add_ie_hdr(resp);
3899         p2p_buf_add_status(resp, status);
3900         if (noa) {
3901                 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
3902                 wpabuf_put_le16(resp, noa_len);
3903                 wpabuf_put_data(resp, noa, noa_len);
3904         } else
3905                 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
3906         p2p_buf_update_ie_hdr(resp, len);
3907
3908         return resp;
3909 }
3910
3911
3912 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
3913                                      const u8 *sa, const u8 *data, size_t len,
3914                                      int rx_freq)
3915 {
3916         struct p2p_message msg;
3917         u8 status;
3918         struct wpabuf *resp;
3919         size_t g;
3920         struct p2p_group *group = NULL;
3921         int parsed = 0;
3922         u8 noa[50];
3923         int noa_len;
3924
3925         p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
3926
3927         for (g = 0; g < p2p->num_groups; g++) {
3928                 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
3929                               ETH_ALEN) == 0) {
3930                         group = p2p->groups[g];
3931                         break;
3932                 }
3933         }
3934         if (group == NULL) {
3935                 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
3936                         MACSTR, MAC2STR(da));
3937                 return;
3938         }
3939
3940         if (p2p_parse(data, len, &msg) < 0) {
3941                 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
3942                 status = P2P_SC_FAIL_INVALID_PARAMS;
3943                 goto fail;
3944         }
3945         parsed = 1;
3946
3947         if (msg.noa == NULL) {
3948                 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
3949                 status = P2P_SC_FAIL_INVALID_PARAMS;
3950                 goto fail;
3951         }
3952
3953         status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
3954
3955 fail:
3956         if (p2p->cfg->get_noa)
3957                 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
3958                                             sizeof(noa));
3959         else
3960                 noa_len = -1;
3961         resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
3962                                        noa_len > 0 ? noa_len : 0,
3963                                        msg.dialog_token);
3964         if (parsed)
3965                 p2p_parse_free(&msg);
3966         if (resp == NULL)
3967                 return;
3968
3969         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3970         if (p2p_send_action(p2p, rx_freq, sa, da, da,
3971                             wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
3972                 p2p_dbg(p2p, "Failed to send Action frame");
3973         }
3974         wpabuf_free(resp);
3975 }
3976
3977
3978 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
3979                                       const u8 *sa, const u8 *data, size_t len)
3980 {
3981         struct p2p_message msg;
3982
3983         p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
3984
3985         if (p2p_parse(data, len, &msg) < 0) {
3986                 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
3987                 return;
3988         }
3989
3990         if (msg.status == NULL || msg.noa == NULL) {
3991                 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
3992                 p2p_parse_free(&msg);
3993                 return;
3994         }
3995
3996         if (p2p->cfg->presence_resp) {
3997                 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
3998                                         msg.noa, msg.noa_len);
3999         }
4000
4001         if (*msg.status) {
4002                 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
4003                         *msg.status);
4004                 p2p_parse_free(&msg);
4005                 return;
4006         }
4007
4008         p2p_dbg(p2p, "P2P Presence Request was accepted");
4009         wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
4010                     msg.noa, msg.noa_len);
4011         /* TODO: process NoA */
4012         p2p_parse_free(&msg);
4013 }
4014
4015
4016 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
4017 {
4018         struct p2p_data *p2p = eloop_ctx;
4019
4020         if (p2p->ext_listen_interval) {
4021                 /* Schedule next extended listen timeout */
4022                 eloop_register_timeout(p2p->ext_listen_interval_sec,
4023                                        p2p->ext_listen_interval_usec,
4024                                        p2p_ext_listen_timeout, p2p, NULL);
4025         }
4026
4027         if ((p2p->cfg->is_p2p_in_progress &&
4028              p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
4029             (p2p->pending_action_state == P2P_PENDING_PD &&
4030              p2p->pd_retries > 0)) {
4031                 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
4032                         p2p_state_txt(p2p->state));
4033                 return;
4034         }
4035
4036         if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
4037                 /*
4038                  * This should not really happen, but it looks like the Listen
4039                  * command may fail is something else (e.g., a scan) was
4040                  * running at an inconvenient time. As a workaround, allow new
4041                  * Extended Listen operation to be started.
4042                  */
4043                 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
4044                 p2p->ext_listen_only = 0;
4045                 p2p_set_state(p2p, P2P_IDLE);
4046         }
4047
4048         if (p2p->state != P2P_IDLE) {
4049                 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
4050                 return;
4051         }
4052
4053         p2p_dbg(p2p, "Extended Listen timeout");
4054         p2p->ext_listen_only = 1;
4055         if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
4056                 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
4057                 p2p->ext_listen_only = 0;
4058         }
4059 }
4060
4061
4062 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
4063                    unsigned int interval)
4064 {
4065         if (period > 65535 || interval > 65535 || period > interval ||
4066             (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
4067                 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
4068                         period, interval);
4069                 return -1;
4070         }
4071
4072         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
4073
4074         if (interval == 0) {
4075                 p2p_dbg(p2p, "Disabling Extended Listen Timing");
4076                 p2p->ext_listen_period = 0;
4077                 p2p->ext_listen_interval = 0;
4078                 return 0;
4079         }
4080
4081         p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
4082                 period, interval);
4083         p2p->ext_listen_period = period;
4084         p2p->ext_listen_interval = interval;
4085         p2p->ext_listen_interval_sec = interval / 1000;
4086         p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
4087
4088         eloop_register_timeout(p2p->ext_listen_interval_sec,
4089                                p2p->ext_listen_interval_usec,
4090                                p2p_ext_listen_timeout, p2p, NULL);
4091
4092         return 0;
4093 }
4094
4095
4096 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4097                       const u8 *ie, size_t ie_len)
4098 {
4099         struct p2p_message msg;
4100
4101         if (bssid == NULL || ie == NULL)
4102                 return;
4103
4104         os_memset(&msg, 0, sizeof(msg));
4105         if (p2p_parse_ies(ie, ie_len, &msg))
4106                 return;
4107         if (msg.minor_reason_code == NULL) {
4108                 p2p_parse_free(&msg);
4109                 return;
4110         }
4111
4112         p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
4113                 " reason_code=%u minor_reason_code=%u",
4114                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4115
4116         p2p_parse_free(&msg);
4117 }
4118
4119
4120 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4121                         const u8 *ie, size_t ie_len)
4122 {
4123         struct p2p_message msg;
4124
4125         if (bssid == NULL || ie == NULL)
4126                 return;
4127
4128         os_memset(&msg, 0, sizeof(msg));
4129         if (p2p_parse_ies(ie, ie_len, &msg))
4130                 return;
4131         if (msg.minor_reason_code == NULL) {
4132                 p2p_parse_free(&msg);
4133                 return;
4134         }
4135
4136         p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
4137                 " reason_code=%u minor_reason_code=%u",
4138                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4139
4140         p2p_parse_free(&msg);
4141 }
4142
4143
4144 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
4145 {
4146         if (enabled) {
4147                 p2p_dbg(p2p, "Managed P2P Device operations enabled");
4148                 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
4149         } else {
4150                 p2p_dbg(p2p, "Managed P2P Device operations disabled");
4151                 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
4152         }
4153 }
4154
4155
4156 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class,
4157                                  u8 *op_channel)
4158 {
4159         return p2p_channel_random_social(&p2p->channels, op_class, op_channel);
4160 }
4161
4162
4163 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
4164                            u8 forced)
4165 {
4166         if (p2p_channel_to_freq(reg_class, channel) < 0)
4167                 return -1;
4168
4169         p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
4170                 reg_class, channel);
4171
4172         /*
4173          * Listen channel was set in configuration or set by control interface;
4174          * cannot override it.
4175          */
4176         if (p2p->cfg->channel_forced && forced == 0)
4177                 return -1;
4178
4179         if (p2p->state == P2P_IDLE) {
4180                 p2p->cfg->reg_class = reg_class;
4181                 p2p->cfg->channel = channel;
4182                 p2p->cfg->channel_forced = forced;
4183         } else {
4184                 p2p_dbg(p2p, "Defer setting listen channel");
4185                 p2p->pending_reg_class = reg_class;
4186                 p2p->pending_channel = channel;
4187                 p2p->pending_channel_forced = forced;
4188         }
4189
4190         return 0;
4191 }
4192
4193
4194 u8 p2p_get_listen_channel(struct p2p_data *p2p)
4195 {
4196         return p2p->cfg->channel;
4197 }
4198
4199
4200 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
4201 {
4202         p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
4203         if (postfix == NULL) {
4204                 p2p->cfg->ssid_postfix_len = 0;
4205                 return 0;
4206         }
4207         if (len > sizeof(p2p->cfg->ssid_postfix))
4208                 return -1;
4209         os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
4210         p2p->cfg->ssid_postfix_len = len;
4211         return 0;
4212 }
4213
4214
4215 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
4216                          int cfg_op_channel)
4217 {
4218         if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
4219                 return -1;
4220
4221         p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
4222                 op_reg_class, op_channel);
4223         p2p->cfg->op_reg_class = op_reg_class;
4224         p2p->cfg->op_channel = op_channel;
4225         p2p->cfg->cfg_op_channel = cfg_op_channel;
4226         return 0;
4227 }
4228
4229
4230 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
4231                       const struct p2p_channel *pref_chan)
4232 {
4233         struct p2p_channel *n;
4234
4235         if (pref_chan) {
4236                 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
4237                 if (n == NULL)
4238                         return -1;
4239                 os_memcpy(n, pref_chan,
4240                           num_pref_chan * sizeof(struct p2p_channel));
4241         } else
4242                 n = NULL;
4243
4244         os_free(p2p->cfg->pref_chan);
4245         p2p->cfg->pref_chan = n;
4246         p2p->cfg->num_pref_chan = num_pref_chan;
4247
4248         return 0;
4249 }
4250
4251
4252 int p2p_set_no_go_freq(struct p2p_data *p2p,
4253                        const struct wpa_freq_range_list *list)
4254 {
4255         struct wpa_freq_range *tmp;
4256
4257         if (list == NULL || list->num == 0) {
4258                 os_free(p2p->no_go_freq.range);
4259                 p2p->no_go_freq.range = NULL;
4260                 p2p->no_go_freq.num = 0;
4261                 return 0;
4262         }
4263
4264         tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4265         if (tmp == NULL)
4266                 return -1;
4267         os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4268         os_free(p2p->no_go_freq.range);
4269         p2p->no_go_freq.range = tmp;
4270         p2p->no_go_freq.num = list->num;
4271         p2p_dbg(p2p, "Updated no GO chan list");
4272
4273         return 0;
4274 }
4275
4276
4277 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4278                            u8 *iface_addr)
4279 {
4280         struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4281         if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4282                 return -1;
4283         os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4284         return 0;
4285 }
4286
4287
4288 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4289                            u8 *dev_addr)
4290 {
4291         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4292         if (dev == NULL)
4293                 return -1;
4294         os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4295         return 0;
4296 }
4297
4298
4299 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4300 {
4301         os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4302         if (is_zero_ether_addr(p2p->peer_filter))
4303                 p2p_dbg(p2p, "Disable peer filter");
4304         else
4305                 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4306                         MAC2STR(p2p->peer_filter));
4307 }
4308
4309
4310 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4311 {
4312         p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4313         if (p2p->cross_connect == enabled)
4314                 return;
4315         p2p->cross_connect = enabled;
4316         /* TODO: may need to tear down any action group where we are GO(?) */
4317 }
4318
4319
4320 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4321 {
4322         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4323         if (dev == NULL)
4324                 return -1;
4325         if (dev->oper_freq <= 0)
4326                 return -1;
4327         return dev->oper_freq;
4328 }
4329
4330
4331 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4332 {
4333         p2p_dbg(p2p, "Intra BSS distribution %s",
4334                 enabled ? "enabled" : "disabled");
4335         p2p->cfg->p2p_intra_bss = enabled;
4336 }
4337
4338
4339 void p2p_update_channel_list(struct p2p_data *p2p,
4340                              const struct p2p_channels *chan,
4341                              const struct p2p_channels *cli_chan)
4342 {
4343         p2p_dbg(p2p, "Update channel list");
4344         os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4345         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4346         os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4347                   sizeof(struct p2p_channels));
4348         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4349 }
4350
4351
4352 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4353                     const u8 *src, const u8 *bssid, const u8 *buf,
4354                     size_t len, unsigned int wait_time)
4355 {
4356         if (p2p->p2p_scan_running) {
4357                 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4358                 if (p2p->after_scan_tx) {
4359                         p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4360                         os_free(p2p->after_scan_tx);
4361                 }
4362                 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4363                                                len);
4364                 if (p2p->after_scan_tx == NULL)
4365                         return -1;
4366                 p2p->after_scan_tx->freq = freq;
4367                 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4368                 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4369                 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4370                 p2p->after_scan_tx->len = len;
4371                 p2p->after_scan_tx->wait_time = wait_time;
4372                 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4373                 return 0;
4374         }
4375
4376         return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4377                                      buf, len, wait_time);
4378 }
4379
4380
4381 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4382                            int freq_overall)
4383 {
4384         p2p_dbg(p2p, "Best channel: 2.4 GHz: %d,  5 GHz: %d,  overall: %d",
4385                 freq_24, freq_5, freq_overall);
4386         p2p->best_freq_24 = freq_24;
4387         p2p->best_freq_5 = freq_5;
4388         p2p->best_freq_overall = freq_overall;
4389 }
4390
4391
4392 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4393 {
4394         p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4395         p2p->own_freq_preference = freq;
4396 }
4397
4398
4399 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4400 {
4401         if (p2p == NULL || p2p->go_neg_peer == NULL)
4402                 return NULL;
4403         return p2p->go_neg_peer->info.p2p_device_addr;
4404 }
4405
4406
4407 const struct p2p_peer_info *
4408 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4409 {
4410         struct p2p_device *dev;
4411
4412         if (addr) {
4413                 dev = p2p_get_device(p2p, addr);
4414                 if (!dev)
4415                         return NULL;
4416
4417                 if (!next) {
4418                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4419                                 return NULL;
4420
4421                         return &dev->info;
4422                 } else {
4423                         do {
4424                                 dev = dl_list_first(&dev->list,
4425                                                     struct p2p_device,
4426                                                     list);
4427                                 if (!dev || &dev->list == &p2p->devices)
4428                                         return NULL;
4429                         } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4430                 }
4431         } else {
4432                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4433                 if (!dev)
4434                         return NULL;
4435                 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4436                         dev = dl_list_first(&dev->list,
4437                                             struct p2p_device,
4438                                             list);
4439                         if (!dev || &dev->list == &p2p->devices)
4440                                 return NULL;
4441                 }
4442         }
4443
4444         return &dev->info;
4445 }
4446
4447
4448 int p2p_in_progress(struct p2p_data *p2p)
4449 {
4450         if (p2p == NULL)
4451                 return 0;
4452         if (p2p->state == P2P_SEARCH)
4453                 return 2;
4454         return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4455 }
4456
4457
4458 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4459                             u8 client_timeout)
4460 {
4461         if (p2p) {
4462                 p2p->go_timeout = go_timeout;
4463                 p2p->client_timeout = client_timeout;
4464         }
4465 }
4466
4467
4468 #ifdef CONFIG_WIFI_DISPLAY
4469
4470 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4471 {
4472         size_t g;
4473         struct p2p_group *group;
4474
4475         for (g = 0; g < p2p->num_groups; g++) {
4476                 group = p2p->groups[g];
4477                 p2p_group_force_beacon_update_ies(group);
4478         }
4479 }
4480
4481
4482 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4483 {
4484         wpabuf_free(p2p->wfd_ie_beacon);
4485         p2p->wfd_ie_beacon = ie;
4486         p2p_update_wfd_ie_groups(p2p);
4487         return 0;
4488 }
4489
4490
4491 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4492 {
4493         wpabuf_free(p2p->wfd_ie_probe_req);
4494         p2p->wfd_ie_probe_req = ie;
4495         return 0;
4496 }
4497
4498
4499 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4500 {
4501         wpabuf_free(p2p->wfd_ie_probe_resp);
4502         p2p->wfd_ie_probe_resp = ie;
4503         p2p_update_wfd_ie_groups(p2p);
4504         return 0;
4505 }
4506
4507
4508 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4509 {
4510         wpabuf_free(p2p->wfd_ie_assoc_req);
4511         p2p->wfd_ie_assoc_req = ie;
4512         return 0;
4513 }
4514
4515
4516 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4517 {
4518         wpabuf_free(p2p->wfd_ie_invitation);
4519         p2p->wfd_ie_invitation = ie;
4520         return 0;
4521 }
4522
4523
4524 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4525 {
4526         wpabuf_free(p2p->wfd_ie_prov_disc_req);
4527         p2p->wfd_ie_prov_disc_req = ie;
4528         return 0;
4529 }
4530
4531
4532 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
4533 {
4534         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
4535         p2p->wfd_ie_prov_disc_resp = ie;
4536         return 0;
4537 }
4538
4539
4540 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
4541 {
4542         wpabuf_free(p2p->wfd_ie_go_neg);
4543         p2p->wfd_ie_go_neg = ie;
4544         return 0;
4545 }
4546
4547
4548 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
4549 {
4550         wpabuf_free(p2p->wfd_dev_info);
4551         if (elem) {
4552                 p2p->wfd_dev_info = wpabuf_dup(elem);
4553                 if (p2p->wfd_dev_info == NULL)
4554                         return -1;
4555         } else
4556                 p2p->wfd_dev_info = NULL;
4557
4558         return 0;
4559 }
4560
4561
4562 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
4563 {
4564         wpabuf_free(p2p->wfd_assoc_bssid);
4565         if (elem) {
4566                 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
4567                 if (p2p->wfd_assoc_bssid == NULL)
4568                         return -1;
4569         } else
4570                 p2p->wfd_assoc_bssid = NULL;
4571
4572         return 0;
4573 }
4574
4575
4576 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
4577                                   const struct wpabuf *elem)
4578 {
4579         wpabuf_free(p2p->wfd_coupled_sink_info);
4580         if (elem) {
4581                 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
4582                 if (p2p->wfd_coupled_sink_info == NULL)
4583                         return -1;
4584         } else
4585                 p2p->wfd_coupled_sink_info = NULL;
4586
4587         return 0;
4588 }
4589
4590 #endif /* CONFIG_WIFI_DISPLAY */
4591
4592
4593 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
4594                      int max_disc_tu)
4595 {
4596         if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
4597                 return -1;
4598
4599         p2p->min_disc_int = min_disc_int;
4600         p2p->max_disc_int = max_disc_int;
4601         p2p->max_disc_tu = max_disc_tu;
4602         p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
4603                 min_disc_int, max_disc_int, max_disc_tu);
4604
4605         return 0;
4606 }
4607
4608
4609 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
4610 {
4611         va_list ap;
4612         char buf[500];
4613
4614         if (!p2p->cfg->debug_print)
4615                 return;
4616
4617         va_start(ap, fmt);
4618         vsnprintf(buf, sizeof(buf), fmt, ap);
4619         buf[sizeof(buf) - 1] = '\0';
4620         va_end(ap);
4621         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
4622 }
4623
4624
4625 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
4626 {
4627         va_list ap;
4628         char buf[500];
4629
4630         if (!p2p->cfg->debug_print)
4631                 return;
4632
4633         va_start(ap, fmt);
4634         vsnprintf(buf, sizeof(buf), fmt, ap);
4635         buf[sizeof(buf) - 1] = '\0';
4636         va_end(ap);
4637         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
4638 }
4639
4640
4641 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
4642 {
4643         va_list ap;
4644         char buf[500];
4645
4646         if (!p2p->cfg->debug_print)
4647                 return;
4648
4649         va_start(ap, fmt);
4650         vsnprintf(buf, sizeof(buf), fmt, ap);
4651         buf[sizeof(buf) - 1] = '\0';
4652         va_end(ap);
4653         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
4654 }
4655
4656
4657 void p2p_loop_on_known_peers(struct p2p_data *p2p,
4658                              void (*peer_callback)(struct p2p_peer_info *peer,
4659                                                    void *user_data),
4660                              void *user_data)
4661 {
4662         struct p2p_device *dev, *n;
4663
4664         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
4665                 peer_callback(&dev->info, user_data);
4666         }
4667 }
4668
4669
4670 #ifdef CONFIG_WPS_NFC
4671
4672 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
4673                                               int client_freq,
4674                                               const u8 *go_dev_addr,
4675                                               const u8 *ssid, size_t ssid_len)
4676 {
4677         struct wpabuf *buf;
4678         u8 op_class, channel;
4679         enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
4680
4681         buf = wpabuf_alloc(1000);
4682         if (buf == NULL)
4683                 return NULL;
4684
4685         op_class = p2p->cfg->reg_class;
4686         channel = p2p->cfg->channel;
4687
4688         p2p_buf_add_capability(buf, p2p->dev_capab &
4689                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
4690         p2p_buf_add_device_info(buf, p2p, NULL);
4691
4692         if (p2p->num_groups > 0) {
4693                 int freq = p2p_group_get_freq(p2p->groups[0]);
4694                 role = P2P_GO_IN_A_GROUP;
4695                 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
4696                         p2p_dbg(p2p,
4697                                 "Unknown GO operating frequency %d MHz for NFC handover",
4698                                 freq);
4699                         wpabuf_free(buf);
4700                         return NULL;
4701                 }
4702         } else if (client_freq > 0) {
4703                 role = P2P_CLIENT_IN_A_GROUP;
4704                 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
4705                         p2p_dbg(p2p,
4706                                 "Unknown client operating frequency %d MHz for NFC handover",
4707                                 client_freq);
4708                         wpabuf_free(buf);
4709                         return NULL;
4710                 }
4711         }
4712
4713         p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
4714                                        channel, role);
4715
4716         if (p2p->num_groups > 0) {
4717                 /* Limit number of clients to avoid very long message */
4718                 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
4719                 p2p_group_buf_add_id(p2p->groups[0], buf);
4720         } else if (client_freq > 0 &&
4721                    go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
4722                    ssid && ssid_len > 0) {
4723                 /*
4724                  * Add the optional P2P Group ID to indicate in which group this
4725                  * device is a P2P Client.
4726                  */
4727                 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
4728         }
4729
4730         return buf;
4731 }
4732
4733
4734 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
4735                                            int client_freq,
4736                                            const u8 *go_dev_addr,
4737                                            const u8 *ssid, size_t ssid_len)
4738 {
4739         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
4740                                       ssid_len);
4741 }
4742
4743
4744 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
4745                                            int client_freq,
4746                                            const u8 *go_dev_addr,
4747                                            const u8 *ssid, size_t ssid_len)
4748 {
4749         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
4750                                       ssid_len);
4751 }
4752
4753
4754 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
4755                                         struct p2p_nfc_params *params)
4756 {
4757         struct p2p_message msg;
4758         struct p2p_device *dev;
4759         const u8 *p2p_dev_addr;
4760         int freq;
4761         enum p2p_role_indication role;
4762
4763         params->next_step = NO_ACTION;
4764
4765         if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
4766                                    params->p2p_attr, params->p2p_len, &msg)) {
4767                 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
4768                 p2p_parse_free(&msg);
4769                 return -1;
4770         }
4771
4772         if (msg.p2p_device_addr)
4773                 p2p_dev_addr = msg.p2p_device_addr;
4774         else if (msg.device_id)
4775                 p2p_dev_addr = msg.device_id;
4776         else {
4777                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
4778                 p2p_parse_free(&msg);
4779                 return -1;
4780         }
4781
4782         if (msg.oob_dev_password) {
4783                 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
4784                           msg.oob_dev_password_len);
4785                 params->oob_dev_pw_len = msg.oob_dev_password_len;
4786         }
4787
4788         dev = p2p_create_device(p2p, p2p_dev_addr);
4789         if (dev == NULL) {
4790                 p2p_parse_free(&msg);
4791                 return -1;
4792         }
4793
4794         params->peer = &dev->info;
4795
4796         os_get_reltime(&dev->last_seen);
4797         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
4798         p2p_copy_wps_info(p2p, dev, 0, &msg);
4799
4800         if (!msg.oob_go_neg_channel) {
4801                 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
4802                 return -1;
4803         }
4804
4805         if (msg.oob_go_neg_channel[3] == 0 &&
4806             msg.oob_go_neg_channel[4] == 0)
4807                 freq = 0;
4808         else
4809                 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
4810                                            msg.oob_go_neg_channel[4]);
4811         if (freq < 0) {
4812                 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
4813                 return -1;
4814         }
4815         role = msg.oob_go_neg_channel[5];
4816
4817         if (role == P2P_GO_IN_A_GROUP) {
4818                 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
4819                 params->go_freq = freq;
4820         } else if (role == P2P_CLIENT_IN_A_GROUP) {
4821                 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
4822                         freq);
4823                 params->go_freq = freq;
4824         } else
4825                 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
4826         dev->oob_go_neg_freq = freq;
4827
4828         if (!params->sel && role != P2P_GO_IN_A_GROUP) {
4829                 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
4830                                            p2p->cfg->channel);
4831                 if (freq < 0) {
4832                         p2p_dbg(p2p, "Own listen channel not known");
4833                         return -1;
4834                 }
4835                 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
4836                 dev->oob_go_neg_freq = freq;
4837         }
4838
4839         if (msg.group_id) {
4840                 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
4841                 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
4842                 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
4843                           params->go_ssid_len);
4844         }
4845
4846         if (dev->flags & P2P_DEV_USER_REJECTED) {
4847                 p2p_dbg(p2p, "Do not report rejected device");
4848                 p2p_parse_free(&msg);
4849                 return 0;
4850         }
4851
4852         if (!(dev->flags & P2P_DEV_REPORTED)) {
4853                 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
4854                                     !(dev->flags & P2P_DEV_REPORTED_ONCE));
4855                 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
4856         }
4857         p2p_parse_free(&msg);
4858
4859         if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
4860                 params->next_step = BOTH_GO;
4861         else if (role == P2P_GO_IN_A_GROUP)
4862                 params->next_step = JOIN_GROUP;
4863         else if (role == P2P_CLIENT_IN_A_GROUP) {
4864                 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
4865                 params->next_step = PEER_CLIENT;
4866         } else if (p2p->num_groups > 0)
4867                 params->next_step = AUTH_JOIN;
4868         else if (params->sel)
4869                 params->next_step = INIT_GO_NEG;
4870         else
4871                 params->next_step = RESP_GO_NEG;
4872
4873         return 0;
4874 }
4875
4876
4877 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
4878                                       int go_intent,
4879                                       const u8 *own_interface_addr)
4880 {
4881
4882         p2p->authorized_oob_dev_pw_id = dev_pw_id;
4883         if (dev_pw_id == 0) {
4884                 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
4885                 return;
4886         }
4887
4888         p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
4889                 dev_pw_id);
4890
4891         p2p->go_intent = go_intent;
4892         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
4893 }
4894
4895 #endif /* CONFIG_WPS_NFC */
4896
4897
4898 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
4899 {
4900         if (len < 8 || len > 63)
4901                 return -1;
4902         p2p->cfg->passphrase_len = len;
4903         return 0;
4904 }
4905
4906
4907 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
4908 {
4909         p2p->vendor_elem = vendor_elem;
4910 }