src/p2p/p2p.c

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