src/p2p/p2p.c

   1 /*
   2  * Wi-Fi Direct - P2P module
   3  * Copyright (c) 2009-2010, Atheros Communications
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "eloop.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/ieee802_11_common.h"
  15 #include "common/wpa_ctrl.h"
  16 #include "crypto/sha256.h"
  17 #include "crypto/crypto.h"
  18 #include "wps/wps_i.h"
  19 #include "p2p_i.h"
  20 #include "p2p.h"
  21
  22
  23 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
  24 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
  25 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
  26                                      const u8 *sa, const u8 *data, size_t len,
  27                                      int rx_freq);
  28 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
  29                                       const u8 *sa, const u8 *data,
  30                                       size_t len);
  31 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
  32 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx);
  33
  34
  35 /*
  36  * p2p_scan recovery timeout
  37  *
  38  * Many drivers are using 30 second timeout on scan results. Allow a bit larger
  39  * timeout for this to avoid hitting P2P timeout unnecessarily.
  40  */
  41 #define P2P_SCAN_TIMEOUT 35
  42
  43 /**
  44  * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer
  45  * entries will be removed
  46  */
  47 #ifndef P2P_PEER_EXPIRATION_AGE
  48 #define P2P_PEER_EXPIRATION_AGE 60
  49 #endif /* P2P_PEER_EXPIRATION_AGE */
  50
  51 #define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2)
  52
  53 static void p2p_expire_peers(struct p2p_data *p2p)
  54 {
  55         struct p2p_device *dev, *n;
  56         struct os_reltime now;
  57         size_t i;
  58
  59         os_get_reltime(&now);
  60         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
  61                 if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
  62                         continue;
  63
  64                 if (dev == p2p->go_neg_peer) {
  65                         /*
  66                          * GO Negotiation is in progress with the peer, so
  67                          * don't expire the peer entry until GO Negotiation
  68                          * fails or times out.
  69                          */
  70                         continue;
  71                 }
  72
  73                 if (p2p->cfg->go_connected &&
  74                     p2p->cfg->go_connected(p2p->cfg->cb_ctx,
  75                                            dev->info.p2p_device_addr)) {
  76                         /*
  77                          * We are connected as a client to a group in which the
  78                          * peer is the GO, so do not expire the peer entry.
  79                          */
  80                         os_get_reltime(&dev->last_seen);
  81                         continue;
  82                 }
  83
  84                 for (i = 0; i < p2p->num_groups; i++) {
  85                         if (p2p_group_is_client_connected(
  86                                     p2p->groups[i], dev->info.p2p_device_addr))
  87                                 break;
  88                 }
  89                 if (i < p2p->num_groups) {
  90                         /*
  91                          * The peer is connected as a client in a group where
  92                          * we are the GO, so do not expire the peer entry.
  93                          */
  94                         os_get_reltime(&dev->last_seen);
  95                         continue;
  96                 }
  97
  98                 p2p_dbg(p2p, "Expiring old peer entry " MACSTR,
  99                         MAC2STR(dev->info.p2p_device_addr));
 100                 dl_list_del(&dev->list);
 101                 p2p_device_free(p2p, dev);
 102         }
 103 }
 104
 105
 106 static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx)
 107 {
 108         struct p2p_data *p2p = eloop_ctx;
 109         p2p_expire_peers(p2p);
 110         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
 111                                p2p_expiration_timeout, p2p, NULL);
 112 }
 113
 114
 115 static const char * p2p_state_txt(int state)
 116 {
 117         switch (state) {
 118         case P2P_IDLE:
 119                 return "IDLE";
 120         case P2P_SEARCH:
 121                 return "SEARCH";
 122         case P2P_CONNECT:
 123                 return "CONNECT";
 124         case P2P_CONNECT_LISTEN:
 125                 return "CONNECT_LISTEN";
 126         case P2P_GO_NEG:
 127                 return "GO_NEG";
 128         case P2P_LISTEN_ONLY:
 129                 return "LISTEN_ONLY";
 130         case P2P_WAIT_PEER_CONNECT:
 131                 return "WAIT_PEER_CONNECT";
 132         case P2P_WAIT_PEER_IDLE:
 133                 return "WAIT_PEER_IDLE";
 134         case P2P_SD_DURING_FIND:
 135                 return "SD_DURING_FIND";
 136         case P2P_PROVISIONING:
 137                 return "PROVISIONING";
 138         case P2P_PD_DURING_FIND:
 139                 return "PD_DURING_FIND";
 140         case P2P_INVITE:
 141                 return "INVITE";
 142         case P2P_INVITE_LISTEN:
 143                 return "INVITE_LISTEN";
 144         default:
 145                 return "?";
 146         }
 147 }
 148
 149
 150 const char * p2p_get_state_txt(struct p2p_data *p2p)
 151 {
 152         return p2p_state_txt(p2p->state);
 153 }
 154
 155
 156 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 157 {
 158         struct p2p_device *dev = NULL;
 159
 160         if (!addr || !p2p)
 161                 return 0;
 162
 163         dev = p2p_get_device(p2p, addr);
 164         if (dev)
 165                 return dev->wps_prov_info;
 166         else
 167                 return 0;
 168 }
 169
 170
 171 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
 172 {
 173         struct p2p_device *dev = NULL;
 174
 175         if (!addr || !p2p)
 176                 return;
 177
 178         dev = p2p_get_device(p2p, addr);
 179         if (dev)
 180                 dev->wps_prov_info = 0;
 181 }
 182
 183
 184 void p2p_set_state(struct p2p_data *p2p, int new_state)
 185 {
 186         p2p_dbg(p2p, "State %s -> %s",
 187                 p2p_state_txt(p2p->state), p2p_state_txt(new_state));
 188         p2p->state = new_state;
 189
 190         if (new_state == P2P_IDLE && p2p->pending_channel) {
 191                 p2p_dbg(p2p, "Apply change in listen channel");
 192                 p2p->cfg->reg_class = p2p->pending_reg_class;
 193                 p2p->cfg->channel = p2p->pending_channel;
 194                 p2p->pending_reg_class = 0;
 195                 p2p->pending_channel = 0;
 196         }
 197 }
 198
 199
 200 void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
 201 {
 202         p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
 203                 p2p_state_txt(p2p->state), sec, usec);
 204         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 205         eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
 206 }
 207
 208
 209 void p2p_clear_timeout(struct p2p_data *p2p)
 210 {
 211         p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
 212         eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
 213 }
 214
 215
 216 void p2p_go_neg_failed(struct p2p_data *p2p, int status)
 217 {
 218         struct p2p_go_neg_results res;
 219         struct p2p_device *peer = p2p->go_neg_peer;
 220
 221         if (!peer)
 222                 return;
 223
 224         eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
 225         if (p2p->state != P2P_SEARCH) {
 226                 /*
 227                  * Clear timeouts related to GO Negotiation if no new p2p_find
 228                  * has been started.
 229                  */
 230                 p2p_clear_timeout(p2p);
 231                 p2p_set_state(p2p, P2P_IDLE);
 232         }
 233
 234         peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
 235         peer->wps_method = WPS_NOT_READY;
 236         peer->oob_pw_id = 0;
 237         wpabuf_free(peer->go_neg_conf);
 238         peer->go_neg_conf = NULL;
 239         p2p->go_neg_peer = NULL;
 240
 241         os_memset(&res, 0, sizeof(res));
 242         res.status = status;
 243         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
 244         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
 245         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
 246 }
 247
 248
 249 static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
 250 {
 251         unsigned int r, tu;
 252         int freq;
 253         struct wpabuf *ies;
 254
 255         p2p_dbg(p2p, "Starting short listen state (state=%s)",
 256                 p2p_state_txt(p2p->state));
 257
 258         if (p2p->pending_listen_freq) {
 259                 /* We have a pending p2p_listen request */
 260                 p2p_dbg(p2p, "p2p_listen command pending already");
 261                 return;
 262         }
 263
 264         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 265         if (freq < 0) {
 266                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 267                 return;
 268         }
 269
 270         if (os_get_random((u8 *) &r, sizeof(r)) < 0)
 271                 r = 0;
 272         tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
 273               p2p->min_disc_int) * 100;
 274         if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
 275                 tu = p2p->max_disc_tu;
 276         if (!dev_disc && tu < 100)
 277                 tu = 100; /* Need to wait in non-device discovery use cases */
 278         if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
 279                 tu = p2p->cfg->max_listen * 1000 / 1024;
 280
 281         if (tu == 0) {
 282                 p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
 283                 p2p_set_timeout(p2p, 0, 0);
 284                 return;
 285         }
 286
 287         ies = p2p_build_probe_resp_ies(p2p);
 288         if (ies == NULL)
 289                 return;
 290
 291         p2p->pending_listen_freq = freq;
 292         p2p->pending_listen_sec = 0;
 293         p2p->pending_listen_usec = 1024 * tu;
 294
 295         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
 296                     ies) < 0) {
 297                 p2p_dbg(p2p, "Failed to start listen mode");
 298                 p2p->pending_listen_freq = 0;
 299         }
 300         wpabuf_free(ies);
 301 }
 302
 303
 304 int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
 305 {
 306         int freq;
 307         struct wpabuf *ies;
 308
 309         p2p_dbg(p2p, "Going to listen(only) state");
 310
 311         if (p2p->pending_listen_freq) {
 312                 /* We have a pending p2p_listen request */
 313                 p2p_dbg(p2p, "p2p_listen command pending already");
 314                 return -1;
 315         }
 316
 317         freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
 318         if (freq < 0) {
 319                 p2p_dbg(p2p, "Unknown regulatory class/channel");
 320                 return -1;
 321         }
 322
 323         p2p->pending_listen_sec = timeout / 1000;
 324         p2p->pending_listen_usec = (timeout % 1000) * 1000;
 325
 326         if (p2p->p2p_scan_running) {
 327                 if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
 328                         p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
 329                         return 0;
 330                 }
 331                 p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
 332                 p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
 333                 return 0;
 334         }
 335
 336         ies = p2p_build_probe_resp_ies(p2p);
 337         if (ies == NULL)
 338                 return -1;
 339
 340         p2p->pending_listen_freq = freq;
 341
 342         if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
 343                 p2p_dbg(p2p, "Failed to start listen mode");
 344                 p2p->pending_listen_freq = 0;
 345                 wpabuf_free(ies);
 346                 return -1;
 347         }
 348         wpabuf_free(ies);
 349
 350         p2p_set_state(p2p, P2P_LISTEN_ONLY);
 351
 352         return 0;
 353 }
 354
 355
 356 static void p2p_device_clear_reported(struct p2p_data *p2p)
 357 {
 358         struct p2p_device *dev;
 359         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 360                 dev->flags &= ~P2P_DEV_REPORTED;
 361                 dev->sd_reqs = 0;
 362         }
 363 }
 364
 365
 366 /**
 367  * p2p_get_device - Fetch a peer entry
 368  * @p2p: P2P module context from p2p_init()
 369  * @addr: P2P Device Address of the peer
 370  * Returns: Pointer to the device entry or %NULL if not found
 371  */
 372 struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
 373 {
 374         struct p2p_device *dev;
 375         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 376                 if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
 377                         return dev;
 378         }
 379         return NULL;
 380 }
 381
 382
 383 /**
 384  * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
 385  * @p2p: P2P module context from p2p_init()
 386  * @addr: P2P Interface Address of the peer
 387  * Returns: Pointer to the device entry or %NULL if not found
 388  */
 389 struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
 390                                              const u8 *addr)
 391 {
 392         struct p2p_device *dev;
 393         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 394                 if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
 395                         return dev;
 396         }
 397         return NULL;
 398 }
 399
 400
 401 /**
 402  * p2p_create_device - Create a peer entry
 403  * @p2p: P2P module context from p2p_init()
 404  * @addr: P2P Device Address of the peer
 405  * Returns: Pointer to the device entry or %NULL on failure
 406  *
 407  * If there is already an entry for the peer, it will be returned instead of
 408  * creating a new one.
 409  */
 410 static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
 411                                              const u8 *addr)
 412 {
 413         struct p2p_device *dev, *oldest = NULL;
 414         size_t count = 0;
 415
 416         dev = p2p_get_device(p2p, addr);
 417         if (dev)
 418                 return dev;
 419
 420         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 421                 count++;
 422                 if (oldest == NULL ||
 423                     os_reltime_before(&dev->last_seen, &oldest->last_seen))
 424                         oldest = dev;
 425         }
 426         if (count + 1 > p2p->cfg->max_peers && oldest) {
 427                 p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
 428                 dl_list_del(&oldest->list);
 429                 p2p_device_free(p2p, oldest);
 430         }
 431
 432         dev = os_zalloc(sizeof(*dev));
 433         if (dev == NULL)
 434                 return NULL;
 435         dl_list_add(&p2p->devices, &dev->list);
 436         os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
 437
 438         return dev;
 439 }
 440
 441
 442 static void p2p_copy_client_info(struct p2p_device *dev,
 443                                  struct p2p_client_info *cli)
 444 {
 445         os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
 446         dev->info.device_name[cli->dev_name_len] = '\0';
 447         dev->info.dev_capab = cli->dev_capab;
 448         dev->info.config_methods = cli->config_methods;
 449         os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
 450         dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
 451         os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
 452                   dev->info.wps_sec_dev_type_list_len);
 453 }
 454
 455
 456 static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
 457                                  const u8 *go_interface_addr, int freq,
 458                                  const u8 *gi, size_t gi_len)
 459 {
 460         struct p2p_group_info info;
 461         size_t c;
 462         struct p2p_device *dev;
 463
 464         if (gi == NULL)
 465                 return 0;
 466
 467         if (p2p_group_info_parse(gi, gi_len, &info) < 0)
 468                 return -1;
 469
 470         /*
 471          * Clear old data for this group; if the devices are still in the
 472          * group, the information will be restored in the loop following this.
 473          */
 474         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 475                 if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
 476                               ETH_ALEN) == 0) {
 477                         os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
 478                         os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
 479                 }
 480         }
 481
 482         for (c = 0; c < info.num_clients; c++) {
 483                 struct p2p_client_info *cli = &info.client[c];
 484                 if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
 485                               ETH_ALEN) == 0)
 486                         continue; /* ignore our own entry */
 487                 dev = p2p_get_device(p2p, cli->p2p_device_addr);
 488                 if (dev) {
 489                         if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
 490                                           P2P_DEV_PROBE_REQ_ONLY)) {
 491                                 /*
 492                                  * Update information since we have not
 493                                  * received this directly from the client.
 494                                  */
 495                                 p2p_copy_client_info(dev, cli);
 496                         } else {
 497                                 /*
 498                                  * Need to update P2P Client Discoverability
 499                                  * flag since it is valid only in P2P Group
 500                                  * Info attribute.
 501                                  */
 502                                 dev->info.dev_capab &=
 503                                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 504                                 dev->info.dev_capab |=
 505                                         cli->dev_capab &
 506                                         P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 507                         }
 508                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
 509                                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
 510                         }
 511                 } else {
 512                         dev = p2p_create_device(p2p, cli->p2p_device_addr);
 513                         if (dev == NULL)
 514                                 continue;
 515                         dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
 516                         p2p_copy_client_info(dev, cli);
 517                         dev->oper_freq = freq;
 518                         p2p->cfg->dev_found(p2p->cfg->cb_ctx,
 519                                             dev->info.p2p_device_addr,
 520                                             &dev->info, 1);
 521                         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 522                 }
 523
 524                 os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
 525                           ETH_ALEN);
 526                 os_get_reltime(&dev->last_seen);
 527                 os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
 528                 os_memcpy(dev->member_in_go_iface, go_interface_addr,
 529                           ETH_ALEN);
 530         }
 531
 532         return 0;
 533 }
 534
 535
 536 static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
 537                               int probe_req, const struct p2p_message *msg)
 538 {
 539         os_memcpy(dev->info.device_name, msg->device_name,
 540                   sizeof(dev->info.device_name));
 541
 542         if (msg->manufacturer &&
 543             msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
 544                 os_memset(dev->info.manufacturer, 0,
 545                           sizeof(dev->info.manufacturer));
 546                 os_memcpy(dev->info.manufacturer, msg->manufacturer,
 547                           msg->manufacturer_len);
 548         }
 549
 550         if (msg->model_name &&
 551             msg->model_name_len < sizeof(dev->info.model_name)) {
 552                 os_memset(dev->info.model_name, 0,
 553                           sizeof(dev->info.model_name));
 554                 os_memcpy(dev->info.model_name, msg->model_name,
 555                           msg->model_name_len);
 556         }
 557
 558         if (msg->model_number &&
 559             msg->model_number_len < sizeof(dev->info.model_number)) {
 560                 os_memset(dev->info.model_number, 0,
 561                           sizeof(dev->info.model_number));
 562                 os_memcpy(dev->info.model_number, msg->model_number,
 563                           msg->model_number_len);
 564         }
 565
 566         if (msg->serial_number &&
 567             msg->serial_number_len < sizeof(dev->info.serial_number)) {
 568                 os_memset(dev->info.serial_number, 0,
 569                           sizeof(dev->info.serial_number));
 570                 os_memcpy(dev->info.serial_number, msg->serial_number,
 571                           msg->serial_number_len);
 572         }
 573
 574         if (msg->pri_dev_type)
 575                 os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
 576                           sizeof(dev->info.pri_dev_type));
 577         else if (msg->wps_pri_dev_type)
 578                 os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
 579                           sizeof(dev->info.pri_dev_type));
 580
 581         if (msg->wps_sec_dev_type_list) {
 582                 os_memcpy(dev->info.wps_sec_dev_type_list,
 583                           msg->wps_sec_dev_type_list,
 584                           msg->wps_sec_dev_type_list_len);
 585                 dev->info.wps_sec_dev_type_list_len =
 586                         msg->wps_sec_dev_type_list_len;
 587         }
 588
 589         if (msg->capability) {
 590                 /*
 591                  * P2P Client Discoverability bit is reserved in all frames
 592                  * that use this function, so do not change its value here.
 593                  */
 594                 dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 595                 dev->info.dev_capab |= msg->capability[0] &
 596                         ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
 597                 dev->info.group_capab = msg->capability[1];
 598         }
 599
 600         if (msg->ext_listen_timing) {
 601                 dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
 602                 dev->ext_listen_interval =
 603                         WPA_GET_LE16(msg->ext_listen_timing + 2);
 604         }
 605
 606         if (!probe_req) {
 607                 u16 new_config_methods;
 608                 new_config_methods = msg->config_methods ?
 609                         msg->config_methods : msg->wps_config_methods;
 610                 if (new_config_methods &&
 611                     dev->info.config_methods != new_config_methods) {
 612                         p2p_dbg(p2p, "Update peer " MACSTR
 613                                 " config_methods 0x%x -> 0x%x",
 614                                 MAC2STR(dev->info.p2p_device_addr),
 615                                 dev->info.config_methods,
 616                                 new_config_methods);
 617                         dev->info.config_methods = new_config_methods;
 618                 }
 619         }
 620 }
 621
 622
 623 static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies,
 624                                          size_t ies_len)
 625 {
 626         const u8 *pos, *end;
 627         u8 id, len;
 628
 629         wpabuf_free(dev->info.vendor_elems);
 630         dev->info.vendor_elems = NULL;
 631
 632         end = ies + ies_len;
 633
 634         for (pos = ies; pos + 1 < end; pos += len) {
 635                 id = *pos++;
 636                 len = *pos++;
 637
 638                 if (pos + len > end)
 639                         break;
 640
 641                 if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3)
 642                         continue;
 643
 644                 if (len >= 4) {
 645                         u32 type = WPA_GET_BE32(pos);
 646
 647                         if (type == WPA_IE_VENDOR_TYPE ||
 648                             type == WMM_IE_VENDOR_TYPE ||
 649                             type == WPS_IE_VENDOR_TYPE ||
 650                             type == P2P_IE_VENDOR_TYPE ||
 651                             type == WFD_IE_VENDOR_TYPE)
 652                                 continue;
 653                 }
 654
 655                 /* Unknown vendor element - make raw IE data available */
 656                 if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0)
 657                         break;
 658                 wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len);
 659         }
 660 }
 661
 662
 663 static int p2p_compare_wfd_info(struct p2p_device *dev,
 664                               const struct p2p_message *msg)
 665 {
 666         if (dev->info.wfd_subelems && msg->wfd_subelems) {
 667                 if (dev->info.wfd_subelems->used != msg->wfd_subelems->used)
 668                         return 1;
 669
 670                 return os_memcmp(dev->info.wfd_subelems->buf,
 671                                  msg->wfd_subelems->buf,
 672                                  dev->info.wfd_subelems->used);
 673         }
 674         if (dev->info.wfd_subelems || msg->wfd_subelems)
 675                 return 1;
 676
 677         return 0;
 678 }
 679
 680
 681 /**
 682  * p2p_add_device - Add peer entries based on scan results or P2P frames
 683  * @p2p: P2P module context from p2p_init()
 684  * @addr: Source address of Beacon or Probe Response frame (may be either
 685  *      P2P Device Address or P2P Interface Address)
 686  * @level: Signal level (signal strength of the received frame from the peer)
 687  * @freq: Frequency on which the Beacon or Probe Response frame was received
 688  * @rx_time: Time when the result was received
 689  * @ies: IEs from the Beacon or Probe Response frame
 690  * @ies_len: Length of ies buffer in octets
 691  * @scan_res: Whether this was based on scan results
 692  * Returns: 0 on success, -1 on failure
 693  *
 694  * If the scan result is for a GO, the clients in the group will also be added
 695  * to the peer table. This function can also be used with some other frames
 696  * like Provision Discovery Request that contains P2P Capability and P2P Device
 697  * Info attributes.
 698  */
 699 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
 700                    struct os_reltime *rx_time, int level, const u8 *ies,
 701                    size_t ies_len, int scan_res)
 702 {
 703         struct p2p_device *dev;
 704         struct p2p_message msg;
 705         const u8 *p2p_dev_addr;
 706         int wfd_changed;
 707         int i;
 708         struct os_reltime time_now;
 709
 710         os_memset(&msg, 0, sizeof(msg));
 711         if (p2p_parse_ies(ies, ies_len, &msg)) {
 712                 p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
 713                 p2p_parse_free(&msg);
 714                 return -1;
 715         }
 716
 717         if (msg.p2p_device_addr)
 718                 p2p_dev_addr = msg.p2p_device_addr;
 719         else if (msg.device_id)
 720                 p2p_dev_addr = msg.device_id;
 721         else {
 722                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
 723                 p2p_parse_free(&msg);
 724                 return -1;
 725         }
 726
 727         if (!is_zero_ether_addr(p2p->peer_filter) &&
 728             os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
 729                 p2p_dbg(p2p, "Do not add peer filter for " MACSTR
 730                         " due to peer filter", MAC2STR(p2p_dev_addr));
 731                 p2p_parse_free(&msg);
 732                 return 0;
 733         }
 734
 735         dev = p2p_create_device(p2p, p2p_dev_addr);
 736         if (dev == NULL) {
 737                 p2p_parse_free(&msg);
 738                 return -1;
 739         }
 740
 741         if (rx_time == NULL) {
 742                 os_get_reltime(&time_now);
 743                 rx_time = &time_now;
 744         }
 745
 746         /*
 747          * Update the device entry only if the new peer
 748          * entry is newer than the one previously stored.
 749          */
 750         if (dev->last_seen.sec > 0 &&
 751             os_reltime_before(rx_time, &dev->last_seen)) {
 752                 p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)",
 753                         (unsigned int) rx_time->sec,
 754                         (unsigned int) rx_time->usec,
 755                         (unsigned int) dev->last_seen.sec,
 756                         (unsigned int) dev->last_seen.usec);
 757                 p2p_parse_free(&msg);
 758                 return -1;
 759         }
 760
 761         os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));
 762
 763         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
 764
 765         if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
 766                 os_memcpy(dev->interface_addr, addr, ETH_ALEN);
 767         if (msg.ssid &&
 768             (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
 769              os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
 770              != 0)) {
 771                 os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
 772                 dev->oper_ssid_len = msg.ssid[1];
 773         }
 774
 775         if (msg.adv_service_instance && msg.adv_service_instance_len) {
 776                 wpabuf_free(dev->info.p2ps_instance);
 777                 dev->info.p2ps_instance = wpabuf_alloc_copy(
 778                         msg.adv_service_instance, msg.adv_service_instance_len);
 779         }
 780
 781         if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
 782             *msg.ds_params >= 1 && *msg.ds_params <= 14) {
 783                 int ds_freq;
 784                 if (*msg.ds_params == 14)
 785                         ds_freq = 2484;
 786                 else
 787                         ds_freq = 2407 + *msg.ds_params * 5;
 788                 if (freq != ds_freq) {
 789                         p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
 790                                 freq, ds_freq);
 791                         freq = ds_freq;
 792                 }
 793         }
 794
 795         if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
 796                 p2p_dbg(p2p, "Update Listen frequency based on scan results ("
 797                         MACSTR " %d -> %d MHz (DS param %d)",
 798                         MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
 799                         freq, msg.ds_params ? *msg.ds_params : -1);
 800         }
 801         if (scan_res) {
 802                 dev->listen_freq = freq;
 803                 if (msg.group_info)
 804                         dev->oper_freq = freq;
 805         }
 806         dev->info.level = level;
 807
 808         p2p_copy_wps_info(p2p, dev, 0, &msg);
 809
 810         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 811                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 812                 dev->info.wps_vendor_ext[i] = NULL;
 813         }
 814
 815         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 816                 if (msg.wps_vendor_ext[i] == NULL)
 817                         break;
 818                 dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
 819                         msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
 820                 if (dev->info.wps_vendor_ext[i] == NULL)
 821                         break;
 822         }
 823
 824         wfd_changed = p2p_compare_wfd_info(dev, &msg);
 825
 826         if (msg.wfd_subelems) {
 827                 wpabuf_free(dev->info.wfd_subelems);
 828                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
 829         }
 830
 831         if (scan_res) {
 832                 p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
 833                                       msg.group_info, msg.group_info_len);
 834         }
 835
 836         p2p_parse_free(&msg);
 837
 838         p2p_update_peer_vendor_elems(dev, ies, ies_len);
 839
 840         if (dev->flags & P2P_DEV_REPORTED && !wfd_changed &&
 841             (!msg.adv_service_instance ||
 842              (dev->flags & P2P_DEV_P2PS_REPORTED)))
 843                 return 0;
 844
 845         p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
 846                 freq, (unsigned int) rx_time->sec,
 847                 (unsigned int) rx_time->usec);
 848         if (dev->flags & P2P_DEV_USER_REJECTED) {
 849                 p2p_dbg(p2p, "Do not report rejected device");
 850                 return 0;
 851         }
 852
 853         if (dev->info.config_methods == 0 &&
 854             (freq == 2412 || freq == 2437 || freq == 2462)) {
 855                 /*
 856                  * If we have only seen a Beacon frame from a GO, we do not yet
 857                  * know what WPS config methods it supports. Since some
 858                  * applications use config_methods value from P2P-DEVICE-FOUND
 859                  * events, postpone reporting this peer until we've fully
 860                  * discovered its capabilities.
 861                  *
 862                  * At least for now, do this only if the peer was detected on
 863                  * one of the social channels since that peer can be easily be
 864                  * found again and there are no limitations of having to use
 865                  * passive scan on this channels, so this can be done through
 866                  * Probe Response frame that includes the config_methods
 867                  * information.
 868                  */
 869                 p2p_dbg(p2p, "Do not report peer " MACSTR
 870                         " with unknown config methods", MAC2STR(addr));
 871                 return 0;
 872         }
 873
 874         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
 875                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
 876         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
 877
 878         if (msg.adv_service_instance)
 879                 dev->flags |= P2P_DEV_P2PS_REPORTED;
 880
 881         return 0;
 882 }
 883
 884
 885 static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
 886 {
 887         int i;
 888
 889         if (p2p->go_neg_peer == dev) {
 890                 /*
 891                  * If GO Negotiation is in progress, report that it has failed.
 892                  */
 893                 p2p_go_neg_failed(p2p, -1);
 894         }
 895         if (p2p->invite_peer == dev)
 896                 p2p->invite_peer = NULL;
 897         if (p2p->sd_peer == dev)
 898                 p2p->sd_peer = NULL;
 899         if (p2p->pending_client_disc_go == dev)
 900                 p2p->pending_client_disc_go = NULL;
 901
 902         /* dev_lost() device, but only if it was previously dev_found() */
 903         if (dev->flags & P2P_DEV_REPORTED_ONCE)
 904                 p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
 905                                    dev->info.p2p_device_addr);
 906
 907         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 908                 wpabuf_free(dev->info.wps_vendor_ext[i]);
 909                 dev->info.wps_vendor_ext[i] = NULL;
 910         }
 911
 912         wpabuf_free(dev->info.wfd_subelems);
 913         wpabuf_free(dev->info.vendor_elems);
 914         wpabuf_free(dev->go_neg_conf);
 915         wpabuf_free(dev->info.p2ps_instance);
 916
 917         os_free(dev);
 918 }
 919
 920
 921 static int p2p_get_next_prog_freq(struct p2p_data *p2p)
 922 {
 923         struct p2p_channels *c;
 924         struct p2p_reg_class *cla;
 925         size_t cl, ch;
 926         int found = 0;
 927         u8 reg_class;
 928         u8 channel;
 929         int freq;
 930
 931         c = &p2p->cfg->channels;
 932         for (cl = 0; cl < c->reg_classes; cl++) {
 933                 cla = &c->reg_class[cl];
 934                 if (cla->reg_class != p2p->last_prog_scan_class)
 935                         continue;
 936                 for (ch = 0; ch < cla->channels; ch++) {
 937                         if (cla->channel[ch] == p2p->last_prog_scan_chan) {
 938                                 found = 1;
 939                                 break;
 940                         }
 941                 }
 942                 if (found)
 943                         break;
 944         }
 945
 946         if (!found) {
 947                 /* Start from beginning */
 948                 reg_class = c->reg_class[0].reg_class;
 949                 channel = c->reg_class[0].channel[0];
 950         } else {
 951                 /* Pick the next channel */
 952                 ch++;
 953                 if (ch == cla->channels) {
 954                         cl++;
 955                         if (cl == c->reg_classes)
 956                                 cl = 0;
 957                         ch = 0;
 958                 }
 959                 reg_class = c->reg_class[cl].reg_class;
 960                 channel = c->reg_class[cl].channel[ch];
 961         }
 962
 963         freq = p2p_channel_to_freq(reg_class, channel);
 964         p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
 965                 reg_class, channel, freq);
 966         p2p->last_prog_scan_class = reg_class;
 967         p2p->last_prog_scan_chan = channel;
 968
 969         if (freq == 2412 || freq == 2437 || freq == 2462)
 970                 return 0; /* No need to add social channels */
 971         return freq;
 972 }
 973
 974
 975 static void p2p_search(struct p2p_data *p2p)
 976 {
 977         int freq = 0;
 978         enum p2p_scan_type type;
 979         u16 pw_id = DEV_PW_DEFAULT;
 980         int res;
 981
 982         if (p2p->drv_in_listen) {
 983                 p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
 984                 return;
 985         }
 986         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
 987
 988         if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
 989             (freq = p2p_get_next_prog_freq(p2p)) > 0) {
 990                 type = P2P_SCAN_SOCIAL_PLUS_ONE;
 991                 p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
 992         } else {
 993                 type = P2P_SCAN_SOCIAL;
 994                 p2p_dbg(p2p, "Starting search");
 995         }
 996
 997         res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
 998                                  p2p->num_req_dev_types, p2p->req_dev_types,
 999                                  p2p->find_dev_id, pw_id);
1000         if (res < 0) {
1001                 p2p_dbg(p2p, "Scan request schedule failed");
1002                 p2p_continue_find(p2p);
1003         }
1004 }
1005
1006
1007 static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
1008 {
1009         struct p2p_data *p2p = eloop_ctx;
1010         p2p_dbg(p2p, "Find timeout -> stop");
1011         p2p_stop_find(p2p);
1012 }
1013
1014
1015 void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status)
1016 {
1017         if (status != 0) {
1018                 p2p_dbg(p2p, "Scan request failed");
1019                 /* Do continue find even for the first p2p_find_scan */
1020                 p2p_continue_find(p2p);
1021         } else {
1022                 p2p_dbg(p2p, "Running p2p_scan");
1023                 p2p->p2p_scan_running = 1;
1024                 eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
1025                 eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
1026                                        p2p, NULL);
1027         }
1028 }
1029
1030
1031 static int p2p_run_after_scan(struct p2p_data *p2p)
1032 {
1033         struct p2p_device *dev;
1034         enum p2p_after_scan op;
1035
1036         if (p2p->after_scan_tx) {
1037                 p2p->after_scan_tx_in_progress = 1;
1038                 p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
1039                 p2p->cfg->send_action(p2p->cfg->cb_ctx,
1040                                       p2p->after_scan_tx->freq,
1041                                       p2p->after_scan_tx->dst,
1042                                       p2p->after_scan_tx->src,
1043                                       p2p->after_scan_tx->bssid,
1044                                       (u8 *) (p2p->after_scan_tx + 1),
1045                                       p2p->after_scan_tx->len,
1046                                       p2p->after_scan_tx->wait_time);
1047                 os_free(p2p->after_scan_tx);
1048                 p2p->after_scan_tx = NULL;
1049                 return 1;
1050         }
1051
1052         op = p2p->start_after_scan;
1053         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1054         switch (op) {
1055         case P2P_AFTER_SCAN_NOTHING:
1056                 break;
1057         case P2P_AFTER_SCAN_LISTEN:
1058                 p2p_dbg(p2p, "Start previously requested Listen state");
1059                 p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
1060                            p2p->pending_listen_usec / 1000);
1061                 return 1;
1062         case P2P_AFTER_SCAN_CONNECT:
1063                 p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
1064                         MAC2STR(p2p->after_scan_peer));
1065                 dev = p2p_get_device(p2p, p2p->after_scan_peer);
1066                 if (dev == NULL) {
1067                         p2p_dbg(p2p, "Peer not known anymore");
1068                         break;
1069                 }
1070                 p2p_connect_send(p2p, dev);
1071                 return 1;
1072         }
1073
1074         return 0;
1075 }
1076
1077
1078 static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1079 {
1080         struct p2p_data *p2p = eloop_ctx;
1081         int running;
1082         p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
1083         running = p2p->p2p_scan_running;
1084         /* Make sure we recover from missed scan results callback */
1085         p2p->p2p_scan_running = 0;
1086
1087         if (running)
1088                 p2p_run_after_scan(p2p);
1089 }
1090
1091
1092 static void p2p_free_req_dev_types(struct p2p_data *p2p)
1093 {
1094         p2p->num_req_dev_types = 0;
1095         os_free(p2p->req_dev_types);
1096         p2p->req_dev_types = NULL;
1097 }
1098
1099
1100 static int p2ps_gen_hash(struct p2p_data *p2p, const char *str, u8 *hash)
1101 {
1102         u8 buf[SHA256_MAC_LEN];
1103         char str_buf[256];
1104         const u8 *adv_array;
1105         size_t i, adv_len;
1106
1107         if (!str || !hash)
1108                 return 0;
1109
1110         if (!str[0]) {
1111                 os_memcpy(hash, p2p->wild_card_hash, P2PS_HASH_LEN);
1112                 return 1;
1113         }
1114
1115         adv_array = (u8 *) str_buf;
1116         adv_len = os_strlen(str);
1117
1118         for (i = 0; str[i] && i < adv_len; i++) {
1119                 if (str[i] >= 'A' && str[i] <= 'Z')
1120                         str_buf[i] = str[i] - 'A' + 'a';
1121                 else
1122                         str_buf[i] = str[i];
1123         }
1124
1125         if (sha256_vector(1, &adv_array, &adv_len, buf))
1126                 return 0;
1127
1128         os_memcpy(hash, buf, P2PS_HASH_LEN);
1129         return 1;
1130 }
1131
1132
1133 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
1134              enum p2p_discovery_type type,
1135              unsigned int num_req_dev_types, const u8 *req_dev_types,
1136              const u8 *dev_id, unsigned int search_delay,
1137              u8 seek_count, const char **seek)
1138 {
1139         int res;
1140
1141         p2p_dbg(p2p, "Starting find (type=%d)", type);
1142         os_get_reltime(&p2p->find_start);
1143         if (p2p->p2p_scan_running) {
1144                 p2p_dbg(p2p, "p2p_scan is already running");
1145         }
1146
1147         p2p_free_req_dev_types(p2p);
1148         if (req_dev_types && num_req_dev_types) {
1149                 p2p->req_dev_types = os_malloc(num_req_dev_types *
1150                                                WPS_DEV_TYPE_LEN);
1151                 if (p2p->req_dev_types == NULL)
1152                         return -1;
1153                 os_memcpy(p2p->req_dev_types, req_dev_types,
1154                           num_req_dev_types * WPS_DEV_TYPE_LEN);
1155                 p2p->num_req_dev_types = num_req_dev_types;
1156         }
1157
1158         if (dev_id) {
1159                 os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
1160                 p2p->find_dev_id = p2p->find_dev_id_buf;
1161         } else
1162                 p2p->find_dev_id = NULL;
1163
1164         if (seek_count == 0 || !seek) {
1165                 /* Not an ASP search */
1166                 p2p->p2ps_seek = 0;
1167         } else if (seek_count == 1 && seek && (!seek[0] || !seek[0][0])) {
1168                 /*
1169                  * An empty seek string means no hash values, but still an ASP
1170                  * search.
1171                  */
1172                 p2p->p2ps_seek_count = 0;
1173                 p2p->p2ps_seek = 1;
1174         } else if (seek && seek_count <= P2P_MAX_QUERY_HASH) {
1175                 u8 buf[P2PS_HASH_LEN];
1176                 int i;
1177
1178                 p2p->p2ps_seek_count = seek_count;
1179                 for (i = 0; i < seek_count; i++) {
1180                         if (!p2ps_gen_hash(p2p, seek[i], buf))
1181                                 continue;
1182
1183                         /* If asking for wildcard, don't do others */
1184                         if (os_memcmp(buf, p2p->wild_card_hash,
1185                                       P2PS_HASH_LEN) == 0) {
1186                                 p2p->p2ps_seek_count = 0;
1187                                 break;
1188                         }
1189
1190                         os_memcpy(&p2p->query_hash[i * P2PS_HASH_LEN], buf,
1191                                   P2PS_HASH_LEN);
1192                 }
1193                 p2p->p2ps_seek = 1;
1194         } else {
1195                 p2p->p2ps_seek_count = 0;
1196                 p2p->p2ps_seek = 1;
1197         }
1198
1199         /* Special case to perform wildcard search */
1200         if (p2p->p2ps_seek_count == 0 && p2p->p2ps_seek) {
1201                 p2p->p2ps_seek_count = 1;
1202                 os_memcpy(&p2p->query_hash, p2p->wild_card_hash, P2PS_HASH_LEN);
1203         }
1204
1205         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1206         p2p_clear_timeout(p2p);
1207         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1208         p2p->find_type = type;
1209         p2p_device_clear_reported(p2p);
1210         p2p_set_state(p2p, P2P_SEARCH);
1211         p2p->search_delay = search_delay;
1212         p2p->in_search_delay = 0;
1213         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1214         p2p->last_p2p_find_timeout = timeout;
1215         if (timeout)
1216                 eloop_register_timeout(timeout, 0, p2p_find_timeout,
1217                                        p2p, NULL);
1218         switch (type) {
1219         case P2P_FIND_START_WITH_FULL:
1220         case P2P_FIND_PROGRESSIVE:
1221                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
1222                                          p2p->num_req_dev_types,
1223                                          p2p->req_dev_types, dev_id,
1224                                          DEV_PW_DEFAULT);
1225                 break;
1226         case P2P_FIND_ONLY_SOCIAL:
1227                 res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
1228                                          p2p->num_req_dev_types,
1229                                          p2p->req_dev_types, dev_id,
1230                                          DEV_PW_DEFAULT);
1231                 break;
1232         default:
1233                 return -1;
1234         }
1235
1236         if (res != 0 && p2p->p2p_scan_running) {
1237                 p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
1238                 /* wait for the previous p2p_scan to complete */
1239                 res = 0; /* do not report failure */
1240         } else if (res != 0) {
1241                 p2p_dbg(p2p, "Failed to start p2p_scan");
1242                 p2p_set_state(p2p, P2P_IDLE);
1243                 eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1244         }
1245
1246         return res;
1247 }
1248
1249
1250 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
1251 {
1252         p2p_dbg(p2p, "Stopping find");
1253         eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
1254         p2p_clear_timeout(p2p);
1255         if (p2p->state == P2P_SEARCH)
1256                 p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
1257
1258         p2p->p2ps_seek_count = 0;
1259
1260         p2p_set_state(p2p, P2P_IDLE);
1261         p2p_free_req_dev_types(p2p);
1262         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1263         if (p2p->go_neg_peer)
1264                 p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
1265         p2p->go_neg_peer = NULL;
1266         p2p->sd_peer = NULL;
1267         p2p->invite_peer = NULL;
1268         p2p_stop_listen_for_freq(p2p, freq);
1269 }
1270
1271
1272 void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
1273 {
1274         if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
1275                 p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
1276                 return;
1277         }
1278         if (p2p->in_listen) {
1279                 p2p->in_listen = 0;
1280                 p2p_clear_timeout(p2p);
1281         }
1282         if (p2p->drv_in_listen) {
1283                 /*
1284                  * The driver may not deliver callback to p2p_listen_end()
1285                  * when the operation gets canceled, so clear the internal
1286                  * variable that is tracking driver state.
1287                  */
1288                 p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
1289                 p2p->drv_in_listen = 0;
1290         }
1291         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1292 }
1293
1294
1295 void p2p_stop_listen(struct p2p_data *p2p)
1296 {
1297         if (p2p->state != P2P_LISTEN_ONLY) {
1298                 p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
1299                 return;
1300         }
1301
1302         p2p_stop_listen_for_freq(p2p, 0);
1303         p2p_set_state(p2p, P2P_IDLE);
1304 }
1305
1306
1307 void p2p_stop_find(struct p2p_data *p2p)
1308 {
1309         p2p->pending_listen_freq = 0;
1310         p2p_stop_find_for_freq(p2p, 0);
1311 }
1312
1313
1314 static int p2p_prepare_channel_pref(struct p2p_data *p2p,
1315                                     unsigned int force_freq,
1316                                     unsigned int pref_freq, int go)
1317 {
1318         u8 op_class, op_channel;
1319         unsigned int freq = force_freq ? force_freq : pref_freq;
1320
1321         p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
1322                 force_freq, pref_freq, go);
1323         if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
1324                 p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
1325                 return -1;
1326         }
1327
1328         if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
1329             (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
1330                                           op_channel))) {
1331                 p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
1332                         freq, op_class, op_channel);
1333                 return -1;
1334         }
1335
1336         p2p->op_reg_class = op_class;
1337         p2p->op_channel = op_channel;
1338
1339         if (force_freq) {
1340                 p2p->channels.reg_classes = 1;
1341                 p2p->channels.reg_class[0].channels = 1;
1342                 p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
1343                 p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
1344         } else {
1345                 os_memcpy(&p2p->channels, &p2p->cfg->channels,
1346                           sizeof(struct p2p_channels));
1347         }
1348
1349         return 0;
1350 }
1351
1352
1353 static void p2p_prepare_channel_best(struct p2p_data *p2p)
1354 {
1355         u8 op_class, op_channel;
1356         const int op_classes_5ghz[] = { 124, 115, 0 };
1357         const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
1358         const int op_classes_vht[] = { 128, 0 };
1359
1360         p2p_dbg(p2p, "Prepare channel best");
1361
1362         if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
1363             p2p_supported_freq(p2p, p2p->best_freq_overall) &&
1364             p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
1365             == 0) {
1366                 p2p_dbg(p2p, "Select best overall channel as operating channel preference");
1367                 p2p->op_reg_class = op_class;
1368                 p2p->op_channel = op_channel;
1369         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
1370                    p2p_supported_freq(p2p, p2p->best_freq_5) &&
1371                    p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
1372                    == 0) {
1373                 p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
1374                 p2p->op_reg_class = op_class;
1375                 p2p->op_channel = op_channel;
1376         } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
1377                    p2p_supported_freq(p2p, p2p->best_freq_24) &&
1378                    p2p_freq_to_channel(p2p->best_freq_24, &op_class,
1379                                        &op_channel) == 0) {
1380                 p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
1381                 p2p->op_reg_class = op_class;
1382                 p2p->op_channel = op_channel;
1383         } else if (p2p->cfg->num_pref_chan > 0 &&
1384                    p2p_channels_includes(&p2p->cfg->channels,
1385                                          p2p->cfg->pref_chan[0].op_class,
1386                                          p2p->cfg->pref_chan[0].chan)) {
1387                 p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
1388                 p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
1389                 p2p->op_channel = p2p->cfg->pref_chan[0].chan;
1390         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
1391                                       &p2p->op_reg_class, &p2p->op_channel) ==
1392                    0) {
1393                 p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
1394                         p2p->op_reg_class, p2p->op_channel);
1395         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
1396                                       &p2p->op_reg_class, &p2p->op_channel) ==
1397                    0) {
1398                 p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
1399                         p2p->op_reg_class, p2p->op_channel);
1400         } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
1401                                       &p2p->op_reg_class, &p2p->op_channel) ==
1402                    0) {
1403                 p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
1404                         p2p->op_reg_class, p2p->op_channel);
1405         } else if (p2p_channels_includes(&p2p->cfg->channels,
1406                                          p2p->cfg->op_reg_class,
1407                                          p2p->cfg->op_channel)) {
1408                 p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
1409                 p2p->op_reg_class = p2p->cfg->op_reg_class;
1410                 p2p->op_channel = p2p->cfg->op_channel;
1411         } else if (p2p_channel_random_social(&p2p->cfg->channels,
1412                                              &p2p->op_reg_class,
1413                                              &p2p->op_channel) == 0) {
1414                 p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference",
1415                         p2p->op_reg_class, p2p->op_channel);
1416         } else {
1417                 /* Select any random available channel from the first available
1418                  * operating class */
1419                 p2p_channel_select(&p2p->cfg->channels, NULL,
1420                                    &p2p->op_reg_class,
1421                                    &p2p->op_channel);
1422                 p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
1423                         p2p->op_channel, p2p->op_reg_class);
1424         }
1425
1426         os_memcpy(&p2p->channels, &p2p->cfg->channels,
1427                   sizeof(struct p2p_channels));
1428 }
1429
1430
1431 /**
1432  * p2p_prepare_channel - Select operating channel for GO Negotiation
1433  * @p2p: P2P module context from p2p_init()
1434  * @dev: Selected peer device
1435  * @force_freq: Forced frequency in MHz or 0 if not forced
1436  * @pref_freq: Preferred frequency in MHz or 0 if no preference
1437  * @go: Whether the local end will be forced to be GO
1438  * Returns: 0 on success, -1 on failure (channel not supported for P2P)
1439  *
1440  * This function is used to do initial operating channel selection for GO
1441  * Negotiation prior to having received peer information. The selected channel
1442  * may be further optimized in p2p_reselect_channel() once the peer information
1443  * is available.
1444  */
1445 int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
1446                         unsigned int force_freq, unsigned int pref_freq, int go)
1447 {
1448         p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
1449                 force_freq, pref_freq, go);
1450         if (force_freq || pref_freq) {
1451                 if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
1452                     0)
1453                         return -1;
1454         } else {
1455                 p2p_prepare_channel_best(p2p);
1456         }
1457         p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
1458         if (go)
1459                 p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
1460         else if (!force_freq)
1461                 p2p_channels_union_inplace(&p2p->channels,
1462                                            &p2p->cfg->cli_channels);
1463         p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
1464
1465         p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
1466                 p2p->op_reg_class, p2p->op_channel,
1467                 force_freq ? " (forced)" : "");
1468
1469         if (force_freq)
1470                 dev->flags |= P2P_DEV_FORCE_FREQ;
1471         else
1472                 dev->flags &= ~P2P_DEV_FORCE_FREQ;
1473
1474         return 0;
1475 }
1476
1477
1478 static void p2p_set_dev_persistent(struct p2p_device *dev,
1479                                    int persistent_group)
1480 {
1481         switch (persistent_group) {
1482         case 0:
1483                 dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
1484                                 P2P_DEV_PREFER_PERSISTENT_RECONN);
1485                 break;
1486         case 1:
1487                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
1488                 dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
1489                 break;
1490         case 2:
1491                 dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
1492                         P2P_DEV_PREFER_PERSISTENT_RECONN;
1493                 break;
1494         }
1495 }
1496
1497
1498 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
1499                 enum p2p_wps_method wps_method,
1500                 int go_intent, const u8 *own_interface_addr,
1501                 unsigned int force_freq, int persistent_group,
1502                 const u8 *force_ssid, size_t force_ssid_len,
1503                 int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
1504 {
1505         struct p2p_device *dev;
1506
1507         p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
1508                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1509                 " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
1510                 "oob_pw_id=%u",
1511                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1512                 wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
1513
1514         dev = p2p_get_device(p2p, peer_addr);
1515         if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
1516                 p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
1517                         MAC2STR(peer_addr));
1518                 return -1;
1519         }
1520
1521         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
1522                                 go_intent == 15) < 0)
1523                 return -1;
1524
1525         if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
1526                 if (!(dev->info.dev_capab &
1527                       P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
1528                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1529                                 " that is in a group and is not discoverable",
1530                                 MAC2STR(peer_addr));
1531                         return -1;
1532                 }
1533                 if (dev->oper_freq <= 0) {
1534                         p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
1535                                 " with incomplete information",
1536                                 MAC2STR(peer_addr));
1537                         return -1;
1538                 }
1539
1540                 /*
1541                  * First, try to connect directly. If the peer does not
1542                  * acknowledge frames, assume it is sleeping and use device
1543                  * discoverability via the GO at that point.
1544                  */
1545         }
1546
1547         p2p->ssid_set = 0;
1548         if (force_ssid) {
1549                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1550                                   force_ssid, force_ssid_len);
1551                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1552                 p2p->ssid_len = force_ssid_len;
1553                 p2p->ssid_set = 1;
1554         }
1555
1556         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1557         dev->flags &= ~P2P_DEV_USER_REJECTED;
1558         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
1559         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
1560         if (pd_before_go_neg)
1561                 dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
1562         else {
1563                 dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
1564                 /*
1565                  * Assign dialog token and tie breaker here to use the same
1566                  * values in each retry within the same GO Negotiation exchange.
1567                  */
1568                 dev->dialog_token++;
1569                 if (dev->dialog_token == 0)
1570                         dev->dialog_token = 1;
1571                 dev->tie_breaker = p2p->next_tie_breaker;
1572                 p2p->next_tie_breaker = !p2p->next_tie_breaker;
1573         }
1574         dev->connect_reqs = 0;
1575         dev->go_neg_req_sent = 0;
1576         dev->go_state = UNKNOWN_GO;
1577         p2p_set_dev_persistent(dev, persistent_group);
1578         p2p->go_intent = go_intent;
1579         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1580
1581         if (p2p->state != P2P_IDLE)
1582                 p2p_stop_find(p2p);
1583
1584         if (p2p->after_scan_tx) {
1585                 /*
1586                  * We need to drop the pending frame to avoid issues with the
1587                  * new GO Negotiation, e.g., when the pending frame was from a
1588                  * previous attempt at starting a GO Negotiation.
1589                  */
1590                 p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
1591                 os_free(p2p->after_scan_tx);
1592                 p2p->after_scan_tx = NULL;
1593         }
1594
1595         dev->wps_method = wps_method;
1596         dev->oob_pw_id = oob_pw_id;
1597         dev->status = P2P_SC_SUCCESS;
1598
1599         if (p2p->p2p_scan_running) {
1600                 p2p_dbg(p2p, "p2p_scan running - delay connect send");
1601                 p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
1602                 os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
1603                 return 0;
1604         }
1605         p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
1606
1607         return p2p_connect_send(p2p, dev);
1608 }
1609
1610
1611 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
1612                   enum p2p_wps_method wps_method,
1613                   int go_intent, const u8 *own_interface_addr,
1614                   unsigned int force_freq, int persistent_group,
1615                   const u8 *force_ssid, size_t force_ssid_len,
1616                   unsigned int pref_freq, u16 oob_pw_id)
1617 {
1618         struct p2p_device *dev;
1619
1620         p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
1621                 "  GO Intent=%d  Intended Interface Address=" MACSTR
1622                 " wps_method=%d  persistent_group=%d oob_pw_id=%u",
1623                 MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
1624                 wps_method, persistent_group, oob_pw_id);
1625
1626         dev = p2p_get_device(p2p, peer_addr);
1627         if (dev == NULL) {
1628                 p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
1629                         MAC2STR(peer_addr));
1630                 return -1;
1631         }
1632
1633         if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
1634                                 15) < 0)
1635                 return -1;
1636
1637         p2p->ssid_set = 0;
1638         if (force_ssid) {
1639                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
1640                                   force_ssid, force_ssid_len);
1641                 os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
1642                 p2p->ssid_len = force_ssid_len;
1643                 p2p->ssid_set = 1;
1644         }
1645
1646         dev->flags &= ~P2P_DEV_NOT_YET_READY;
1647         dev->flags &= ~P2P_DEV_USER_REJECTED;
1648         dev->go_neg_req_sent = 0;
1649         dev->go_state = UNKNOWN_GO;
1650         p2p_set_dev_persistent(dev, persistent_group);
1651         p2p->go_intent = go_intent;
1652         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
1653
1654         dev->wps_method = wps_method;
1655         dev->oob_pw_id = oob_pw_id;
1656         dev->status = P2P_SC_SUCCESS;
1657
1658         return 0;
1659 }
1660
1661
1662 void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
1663                       struct p2p_device *dev, struct p2p_message *msg)
1664 {
1665         os_get_reltime(&dev->last_seen);
1666
1667         p2p_copy_wps_info(p2p, dev, 0, msg);
1668
1669         if (msg->listen_channel) {
1670                 int freq;
1671                 freq = p2p_channel_to_freq(msg->listen_channel[3],
1672                                            msg->listen_channel[4]);
1673                 if (freq < 0) {
1674                         p2p_dbg(p2p, "Unknown peer Listen channel: "
1675                                 "country=%c%c(0x%02x) reg_class=%u channel=%u",
1676                                 msg->listen_channel[0],
1677                                 msg->listen_channel[1],
1678                                 msg->listen_channel[2],
1679                                 msg->listen_channel[3],
1680                                 msg->listen_channel[4]);
1681                 } else {
1682                         p2p_dbg(p2p, "Update peer " MACSTR
1683                                 " Listen channel: %u -> %u MHz",
1684                                 MAC2STR(dev->info.p2p_device_addr),
1685                                 dev->listen_freq, freq);
1686                         dev->listen_freq = freq;
1687                 }
1688         }
1689
1690         if (msg->wfd_subelems) {
1691                 wpabuf_free(dev->info.wfd_subelems);
1692                 dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
1693         }
1694
1695         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
1696                 dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
1697                 p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
1698         } else {
1699                 p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
1700                         MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
1701                         "listen_freq=%d",
1702                         MAC2STR(dev->info.p2p_device_addr),
1703                         dev->info.dev_capab, dev->info.group_capab,
1704                         dev->info.device_name, dev->listen_freq);
1705         }
1706
1707         dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
1708
1709         if (dev->flags & P2P_DEV_USER_REJECTED) {
1710                 p2p_dbg(p2p, "Do not report rejected device");
1711                 return;
1712         }
1713
1714         p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
1715                             !(dev->flags & P2P_DEV_REPORTED_ONCE));
1716         dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
1717 }
1718
1719
1720 void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
1721 {
1722         os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
1723         p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
1724         os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
1725                   p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
1726         *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
1727 }
1728
1729
1730 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
1731 {
1732         p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
1733         p2p_random(params->passphrase, p2p->cfg->passphrase_len);
1734         return 0;
1735 }
1736
1737
1738 void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
1739 {
1740         struct p2p_go_neg_results res;
1741         int go = peer->go_state == LOCAL_GO;
1742         struct p2p_channels intersection;
1743
1744         p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
1745                 MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
1746
1747         os_memset(&res, 0, sizeof(res));
1748         res.role_go = go;
1749         os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
1750         os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
1751         res.wps_method = peer->wps_method;
1752         if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
1753                 if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
1754                         res.persistent_group = 2;
1755                 else
1756                         res.persistent_group = 1;
1757         }
1758
1759         if (go) {
1760                 /* Setup AP mode for WPS provisioning */
1761                 res.freq = p2p_channel_to_freq(p2p->op_reg_class,
1762                                                p2p->op_channel);
1763                 os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1764                 res.ssid_len = p2p->ssid_len;
1765                 p2p_random(res.passphrase, p2p->cfg->passphrase_len);
1766         } else {
1767                 res.freq = peer->oper_freq;
1768                 if (p2p->ssid_len) {
1769                         os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
1770                         res.ssid_len = p2p->ssid_len;
1771                 }
1772         }
1773
1774         p2p_channels_dump(p2p, "own channels", &p2p->channels);
1775         p2p_channels_dump(p2p, "peer channels", &peer->channels);
1776         p2p_channels_intersect(&p2p->channels, &peer->channels,
1777                                &intersection);
1778         if (go) {
1779                 p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
1780                 p2p_channels_dump(p2p, "intersection after no-GO removal",
1781                                   &intersection);
1782         }
1783
1784         p2p_channels_to_freqs(&intersection, res.freq_list,
1785                               P2P_MAX_CHANNELS);
1786
1787         res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
1788
1789         p2p_clear_timeout(p2p);
1790         p2p->ssid_set = 0;
1791         peer->go_neg_req_sent = 0;
1792         peer->wps_method = WPS_NOT_READY;
1793         peer->oob_pw_id = 0;
1794         wpabuf_free(peer->go_neg_conf);
1795         peer->go_neg_conf = NULL;
1796
1797         p2p_set_state(p2p, P2P_PROVISIONING);
1798         p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
1799 }
1800
1801
1802 static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
1803                               const u8 *data, size_t len, int rx_freq)
1804 {
1805         p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
1806         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
1807
1808         if (len < 1)
1809                 return;
1810
1811         switch (data[0]) {
1812         case P2P_GO_NEG_REQ:
1813                 p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
1814                 break;
1815         case P2P_GO_NEG_RESP:
1816                 p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
1817                 break;
1818         case P2P_GO_NEG_CONF:
1819                 p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
1820                 break;
1821         case P2P_INVITATION_REQ:
1822                 p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
1823                                            rx_freq);
1824                 break;
1825         case P2P_INVITATION_RESP:
1826                 p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
1827                 break;
1828         case P2P_PROV_DISC_REQ:
1829                 p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1830                 break;
1831         case P2P_PROV_DISC_RESP:
1832                 p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
1833                 break;
1834         case P2P_DEV_DISC_REQ:
1835                 p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
1836                 break;
1837         case P2P_DEV_DISC_RESP:
1838                 p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
1839                 break;
1840         default:
1841                 p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
1842                         data[0]);
1843                 break;
1844         }
1845 }
1846
1847
1848 static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
1849                                  const u8 *sa, const u8 *bssid, const u8 *data,
1850                                  size_t len, int freq)
1851 {
1852         if (len < 1)
1853                 return;
1854
1855         switch (data[0]) {
1856         case WLAN_PA_VENDOR_SPECIFIC:
1857                 data++;
1858                 len--;
1859                 if (len < 4)
1860                         return;
1861                 if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1862                         return;
1863
1864                 data += 4;
1865                 len -= 4;
1866
1867                 p2p_rx_p2p_action(p2p, sa, data, len, freq);
1868                 break;
1869         case WLAN_PA_GAS_INITIAL_REQ:
1870                 p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
1871                 break;
1872         case WLAN_PA_GAS_INITIAL_RESP:
1873                 p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
1874                 break;
1875         case WLAN_PA_GAS_COMEBACK_REQ:
1876                 p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
1877                 break;
1878         case WLAN_PA_GAS_COMEBACK_RESP:
1879                 p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
1880                 break;
1881         }
1882 }
1883
1884
1885 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
1886                    const u8 *bssid, u8 category,
1887                    const u8 *data, size_t len, int freq)
1888 {
1889         if (category == WLAN_ACTION_PUBLIC) {
1890                 p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
1891                 return;
1892         }
1893
1894         if (category != WLAN_ACTION_VENDOR_SPECIFIC)
1895                 return;
1896
1897         if (len < 4)
1898                 return;
1899
1900         if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
1901                 return;
1902         data += 4;
1903         len -= 4;
1904
1905         /* P2P action frame */
1906         p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
1907         wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
1908
1909         if (len < 1)
1910                 return;
1911         switch (data[0]) {
1912         case P2P_NOA:
1913                 p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
1914                 /* TODO */
1915                 break;
1916         case P2P_PRESENCE_REQ:
1917                 p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
1918                 break;
1919         case P2P_PRESENCE_RESP:
1920                 p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
1921                 break;
1922         case P2P_GO_DISC_REQ:
1923                 p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
1924                 break;
1925         default:
1926                 p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
1927                 break;
1928         }
1929 }
1930
1931
1932 static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
1933 {
1934         struct p2p_data *p2p = eloop_ctx;
1935         if (p2p->go_neg_peer == NULL)
1936                 return;
1937         if (p2p->pending_listen_freq) {
1938                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start");
1939                 p2p->pending_listen_freq = 0;
1940         }
1941         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1942         p2p->go_neg_peer->status = P2P_SC_SUCCESS;
1943         /*
1944          * Set new timeout to make sure a previously set one does not expire
1945          * too quickly while waiting for the GO Negotiation to complete.
1946          */
1947         p2p_set_timeout(p2p, 0, 500000);
1948         p2p_connect_send(p2p, p2p->go_neg_peer);
1949 }
1950
1951
1952 static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
1953 {
1954         struct p2p_data *p2p = eloop_ctx;
1955         if (p2p->invite_peer == NULL)
1956                 return;
1957         if (p2p->pending_listen_freq) {
1958                 p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start");
1959                 p2p->pending_listen_freq = 0;
1960         }
1961         p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
1962         p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
1963                         p2p->invite_dev_pw_id);
1964 }
1965
1966
1967 static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
1968                                        const u8 *ie, size_t ie_len)
1969 {
1970         struct p2p_message msg;
1971         struct p2p_device *dev;
1972
1973         os_memset(&msg, 0, sizeof(msg));
1974         if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
1975         {
1976                 p2p_parse_free(&msg);
1977                 return; /* not a P2P probe */
1978         }
1979
1980         if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
1981             os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
1982             != 0) {
1983                 /* The Probe Request is not part of P2P Device Discovery. It is
1984                  * not known whether the source address of the frame is the P2P
1985                  * Device Address or P2P Interface Address. Do not add a new
1986                  * peer entry based on this frames.
1987                  */
1988                 p2p_parse_free(&msg);
1989                 return;
1990         }
1991
1992         dev = p2p_get_device(p2p, addr);
1993         if (dev) {
1994                 if (dev->country[0] == 0 && msg.listen_channel)
1995                         os_memcpy(dev->country, msg.listen_channel, 3);
1996                 os_get_reltime(&dev->last_seen);
1997                 p2p_parse_free(&msg);
1998                 return; /* already known */
1999         }
2000
2001         dev = p2p_create_device(p2p, addr);
2002         if (dev == NULL) {
2003                 p2p_parse_free(&msg);
2004                 return;
2005         }
2006
2007         os_get_reltime(&dev->last_seen);
2008         dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
2009
2010         if (msg.listen_channel) {
2011                 os_memcpy(dev->country, msg.listen_channel, 3);
2012                 dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
2013                                                        msg.listen_channel[4]);
2014         }
2015
2016         p2p_copy_wps_info(p2p, dev, 1, &msg);
2017
2018         if (msg.wfd_subelems) {
2019                 wpabuf_free(dev->info.wfd_subelems);
2020                 dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
2021         }
2022
2023         p2p_parse_free(&msg);
2024
2025         p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
2026                 " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
2027                 MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
2028                 dev->info.group_capab, dev->info.device_name,
2029                 dev->listen_freq);
2030 }
2031
2032
2033 struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
2034                                                 const u8 *addr,
2035                                                 struct p2p_message *msg)
2036 {
2037         struct p2p_device *dev;
2038
2039         dev = p2p_get_device(p2p, addr);
2040         if (dev) {
2041                 os_get_reltime(&dev->last_seen);
2042                 return dev; /* already known */
2043         }
2044
2045         dev = p2p_create_device(p2p, addr);
2046         if (dev == NULL)
2047                 return NULL;
2048
2049         p2p_add_dev_info(p2p, addr, dev, msg);
2050
2051         return dev;
2052 }
2053
2054
2055 static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
2056 {
2057         if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
2058                 return 1;
2059         if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
2060             WPA_GET_BE32(&req_dev_type[2]) == 0 &&
2061             WPA_GET_BE16(&req_dev_type[6]) == 0)
2062                 return 1; /* Category match with wildcard OUI/sub-category */
2063         return 0;
2064 }
2065
2066
2067 int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
2068                         size_t num_req_dev_type)
2069 {
2070         size_t i;
2071         for (i = 0; i < num_req_dev_type; i++) {
2072                 if (dev_type_match(dev_type, req_dev_type[i]))
2073                         return 1;
2074         }
2075         return 0;
2076 }
2077
2078
2079 /**
2080  * p2p_match_dev_type - Match local device type with requested type
2081  * @p2p: P2P module context from p2p_init()
2082  * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
2083  * Returns: 1 on match, 0 on mismatch
2084  *
2085  * This function can be used to match the Requested Device Type attribute in
2086  * WPS IE with the local device types for deciding whether to reply to a Probe
2087  * Request frame.
2088  */
2089 int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
2090 {
2091         struct wps_parse_attr attr;
2092         size_t i;
2093
2094         if (wps_parse_msg(wps, &attr))
2095                 return 1; /* assume no Requested Device Type attributes */
2096
2097         if (attr.num_req_dev_type == 0)
2098                 return 1; /* no Requested Device Type attributes -> match */
2099
2100         if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
2101                                 attr.num_req_dev_type))
2102                 return 1; /* Own Primary Device Type matches */
2103
2104         for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) {
2105                 if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
2106                                         attr.req_dev_type,
2107                                         attr.num_req_dev_type))
2108                         return 1; /* Own Secondary Device Type matches */
2109         }
2110
2111         /* No matching device type found */
2112         return 0;
2113 }
2114
2115
2116 struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
2117 {
2118         struct wpabuf *buf;
2119         u8 *len;
2120         int pw_id = -1;
2121         size_t extra = 0;
2122
2123 #ifdef CONFIG_WIFI_DISPLAY
2124         if (p2p->wfd_ie_probe_resp)
2125                 extra = wpabuf_len(p2p->wfd_ie_probe_resp);
2126 #endif /* CONFIG_WIFI_DISPLAY */
2127
2128         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2129                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2130
2131         if (p2p->query_count)
2132                 extra += MAX_SVC_ADV_IE_LEN;
2133
2134         buf = wpabuf_alloc(1000 + extra);
2135         if (buf == NULL)
2136                 return NULL;
2137
2138         if (p2p->go_neg_peer) {
2139                 /* Advertise immediate availability of WPS credential */
2140                 pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
2141         }
2142
2143         if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
2144                 p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
2145                 wpabuf_free(buf);
2146                 return NULL;
2147         }
2148
2149 #ifdef CONFIG_WIFI_DISPLAY
2150         if (p2p->wfd_ie_probe_resp)
2151                 wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
2152 #endif /* CONFIG_WIFI_DISPLAY */
2153
2154         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
2155                 wpabuf_put_buf(buf,
2156                                p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);
2157
2158         /* P2P IE */
2159         len = p2p_buf_add_ie_hdr(buf);
2160         p2p_buf_add_capability(buf, p2p->dev_capab &
2161                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
2162         if (p2p->ext_listen_interval)
2163                 p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
2164                                               p2p->ext_listen_interval);
2165         p2p_buf_add_device_info(buf, p2p, NULL);
2166         p2p_buf_update_ie_hdr(buf, len);
2167
2168         if (p2p->query_count) {
2169                 p2p_buf_add_service_instance(buf, p2p, p2p->query_count,
2170                                              p2p->query_hash,
2171                                              p2p->p2ps_adv_list);
2172         }
2173
2174         return buf;
2175 }
2176
2177
2178 static int p2p_service_find_asp(struct p2p_data *p2p, const u8 *hash)
2179 {
2180         struct p2ps_advertisement *adv_data;
2181
2182         p2p_dbg(p2p, "ASP find - ASP list: %p", p2p->p2ps_adv_list);
2183
2184         /* Wildcard always matches if we have actual services */
2185         if (os_memcmp(hash, p2p->wild_card_hash, P2PS_HASH_LEN) == 0)
2186                 return p2p->p2ps_adv_list != NULL;
2187
2188         adv_data = p2p->p2ps_adv_list;
2189         while (adv_data) {
2190                 p2p_dbg(p2p, "ASP hash: %x =? %x", hash[0], adv_data->hash[0]);
2191                 if (os_memcmp(hash, adv_data->hash, P2PS_HASH_LEN) == 0)
2192                         return 1;
2193                 adv_data = adv_data->next;
2194         }
2195
2196         return 0;
2197 }
2198
2199
2200 static enum p2p_probe_req_status
2201 p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2202                 const u8 *bssid, const u8 *ie, size_t ie_len)
2203 {
2204         struct ieee802_11_elems elems;
2205         struct wpabuf *buf;
2206         struct ieee80211_mgmt *resp;
2207         struct p2p_message msg;
2208         struct wpabuf *ies;
2209
2210         if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
2211             ParseFailed) {
2212                 /* Ignore invalid Probe Request frames */
2213                 p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
2214                 return P2P_PREQ_MALFORMED;
2215         }
2216
2217         if (elems.p2p == NULL) {
2218                 /* not a P2P probe - ignore it */
2219                 p2p_dbg(p2p, "Not a P2P probe - ignore it");
2220                 return P2P_PREQ_NOT_P2P;
2221         }
2222
2223         if (dst && !is_broadcast_ether_addr(dst) &&
2224             os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2225                 /* Not sent to the broadcast address or our P2P Device Address
2226                  */
2227                 p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
2228                         MAC2STR(dst));
2229                 return P2P_PREQ_NOT_PROCESSED;
2230         }
2231
2232         if (bssid && !is_broadcast_ether_addr(bssid)) {
2233                 /* Not sent to the Wildcard BSSID */
2234                 p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
2235                         MAC2STR(bssid));
2236                 return P2P_PREQ_NOT_PROCESSED;
2237         }
2238
2239         if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
2240             os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
2241             0) {
2242                 /* not using P2P Wildcard SSID - ignore */
2243                 p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
2244                 return P2P_PREQ_NOT_PROCESSED;
2245         }
2246
2247         if (supp_rates_11b_only(&elems)) {
2248                 /* Indicates support for 11b rates only */
2249                 p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
2250                 return P2P_PREQ_NOT_P2P;
2251         }
2252
2253         os_memset(&msg, 0, sizeof(msg));
2254         if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
2255                 /* Could not parse P2P attributes */
2256                 p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
2257                 return P2P_PREQ_NOT_P2P;
2258         }
2259
2260         p2p->p2ps_svc_found = 0;
2261
2262         if (msg.service_hash && msg.service_hash_count) {
2263                 const u8 *hash = msg.service_hash;
2264                 u8 *dest = p2p->query_hash;
2265                 u8 i;
2266
2267                 p2p->query_count = 0;
2268                 for (i = 0; i < msg.service_hash_count; i++) {
2269                         if (p2p_service_find_asp(p2p, hash)) {
2270                                 p2p->p2ps_svc_found = 1;
2271
2272                                 if (!os_memcmp(hash, p2p->wild_card_hash,
2273                                                P2PS_HASH_LEN)) {
2274                                         /* We found match(es) but wildcard
2275                                          * will return all */
2276                                         p2p->query_count = 1;
2277                                         os_memcpy(p2p->query_hash, hash,
2278                                                   P2PS_HASH_LEN);
2279                                         break;
2280                                 }
2281
2282                                 /* Save each matching hash */
2283                                 if (p2p->query_count < P2P_MAX_QUERY_HASH) {
2284                                         os_memcpy(dest, hash, P2PS_HASH_LEN);
2285                                         dest += P2PS_HASH_LEN;
2286                                         p2p->query_count++;
2287                                 } else {
2288                                         /* We found match(es) but too many to
2289                                          * return all */
2290                                         p2p->query_count = 0;
2291                                         break;
2292                                 }
2293                         }
2294                         hash += P2PS_HASH_LEN;
2295                 }
2296
2297                 p2p_dbg(p2p, "ASP adv found: %d", p2p->p2ps_svc_found);
2298
2299                 /* Probed hash unknown */
2300                 if (!p2p->p2ps_svc_found) {
2301                         p2p_parse_free(&msg);
2302                         return P2P_PREQ_NOT_PROCESSED;
2303                 }
2304         } else {
2305                 /* This is not a P2PS Probe Request */
2306                 p2p->query_count = 0;
2307                 p2p_dbg(p2p, "No P2PS Hash in Probe Request");
2308
2309                 if (!p2p->in_listen || !p2p->drv_in_listen) {
2310                         /* not in Listen state - ignore Probe Request */
2311                         p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
2312                                 p2p->in_listen, p2p->drv_in_listen);
2313                         p2p_parse_free(&msg);
2314                         return P2P_PREQ_NOT_LISTEN;
2315                 }
2316         }
2317
2318         if (msg.device_id &&
2319             os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
2320                 /* Device ID did not match */
2321                 p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
2322                         MAC2STR(msg.device_id));
2323                 p2p_parse_free(&msg);
2324                 return P2P_PREQ_NOT_PROCESSED;
2325         }
2326
2327         /* Check Requested Device Type match */
2328         if (msg.wps_attributes &&
2329             !p2p_match_dev_type(p2p, msg.wps_attributes)) {
2330                 /* No match with Requested Device Type */
2331                 p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
2332                 p2p_parse_free(&msg);
2333                 return P2P_PREQ_NOT_PROCESSED;
2334         }
2335         p2p_parse_free(&msg);
2336
2337         if (!p2p->cfg->send_probe_resp) {
2338                 /* Response generated elsewhere */
2339                 p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
2340                 return P2P_PREQ_NOT_PROCESSED;
2341         }
2342
2343         p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
2344
2345         /*
2346          * We do not really have a specific BSS that this frame is advertising,
2347          * so build a frame that has some information in valid format. This is
2348          * really only used for discovery purposes, not to learn exact BSS
2349          * parameters.
2350          */
2351         ies = p2p_build_probe_resp_ies(p2p);
2352         if (ies == NULL)
2353                 return P2P_PREQ_NOT_PROCESSED;
2354
2355         buf = wpabuf_alloc(200 + wpabuf_len(ies));
2356         if (buf == NULL) {
2357                 wpabuf_free(ies);
2358                 return P2P_PREQ_NOT_PROCESSED;
2359         }
2360
2361         resp = NULL;
2362         resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
2363
2364         resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
2365                                            (WLAN_FC_STYPE_PROBE_RESP << 4));
2366         os_memcpy(resp->da, addr, ETH_ALEN);
2367         os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
2368         os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
2369         resp->u.probe_resp.beacon_int = host_to_le16(100);
2370         /* hardware or low-level driver will setup seq_ctrl and timestamp */
2371         resp->u.probe_resp.capab_info =
2372                 host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
2373                              WLAN_CAPABILITY_PRIVACY |
2374                              WLAN_CAPABILITY_SHORT_SLOT_TIME);
2375
2376         wpabuf_put_u8(buf, WLAN_EID_SSID);
2377         wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
2378         wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
2379
2380         wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
2381         wpabuf_put_u8(buf, 8);
2382         wpabuf_put_u8(buf, (60 / 5) | 0x80);
2383         wpabuf_put_u8(buf, 90 / 5);
2384         wpabuf_put_u8(buf, (120 / 5) | 0x80);
2385         wpabuf_put_u8(buf, 180 / 5);
2386         wpabuf_put_u8(buf, (240 / 5) | 0x80);
2387         wpabuf_put_u8(buf, 360 / 5);
2388         wpabuf_put_u8(buf, 480 / 5);
2389         wpabuf_put_u8(buf, 540 / 5);
2390
2391         wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
2392         wpabuf_put_u8(buf, 1);
2393         wpabuf_put_u8(buf, p2p->cfg->channel);
2394
2395         wpabuf_put_buf(buf, ies);
2396         wpabuf_free(ies);
2397
2398         p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
2399
2400         wpabuf_free(buf);
2401
2402         return P2P_PREQ_NOT_PROCESSED;
2403 }
2404
2405
2406 enum p2p_probe_req_status
2407 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
2408                  const u8 *bssid, const u8 *ie, size_t ie_len)
2409 {
2410         enum p2p_probe_req_status res;
2411
2412         p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
2413
2414         res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
2415         p2p->query_count = 0;
2416
2417         if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
2418             p2p->go_neg_peer &&
2419             os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
2420             == 0 &&
2421             !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
2422                 /* Received a Probe Request from GO Negotiation peer */
2423                 p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
2424                 eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2425                 eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
2426                 return P2P_PREQ_PROCESSED;
2427         }
2428
2429         if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
2430             p2p->invite_peer &&
2431             (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
2432             os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
2433             == 0) {
2434                 /* Received a Probe Request from Invite peer */
2435                 p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
2436                 eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
2437                 eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
2438                 return P2P_PREQ_PROCESSED;
2439         }
2440
2441         return res;
2442 }
2443
2444
2445 static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
2446                                     u8 *buf, size_t len, struct wpabuf *p2p_ie)
2447 {
2448         struct wpabuf *tmp;
2449         u8 *lpos;
2450         size_t tmplen;
2451         int res;
2452         u8 group_capab;
2453
2454         if (p2p_ie == NULL)
2455                 return 0; /* WLAN AP is not a P2P manager */
2456
2457         /*
2458          * (Re)Association Request - P2P IE
2459          * P2P Capability attribute (shall be present)
2460          * P2P Interface attribute (present if concurrent device and
2461          *      P2P Management is enabled)
2462          */
2463         tmp = wpabuf_alloc(200);
2464         if (tmp == NULL)
2465                 return -1;
2466
2467         lpos = p2p_buf_add_ie_hdr(tmp);
2468         group_capab = 0;
2469         if (p2p->num_groups > 0) {
2470                 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
2471                 if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2472                     (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
2473                     p2p->cross_connect)
2474                         group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
2475         }
2476         p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
2477         if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
2478             (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
2479                 p2p_buf_add_p2p_interface(tmp, p2p);
2480         p2p_buf_update_ie_hdr(tmp, lpos);
2481
2482         tmplen = wpabuf_len(tmp);
2483         if (tmplen > len)
2484                 res = -1;
2485         else {
2486                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2487                 res = tmplen;
2488         }
2489         wpabuf_free(tmp);
2490
2491         return res;
2492 }
2493
2494
2495 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
2496                      size_t len, int p2p_group, struct wpabuf *p2p_ie)
2497 {
2498         struct wpabuf *tmp;
2499         u8 *lpos;
2500         struct p2p_device *peer;
2501         size_t tmplen;
2502         int res;
2503         size_t extra = 0;
2504
2505         if (!p2p_group)
2506                 return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
2507
2508 #ifdef CONFIG_WIFI_DISPLAY
2509         if (p2p->wfd_ie_assoc_req)
2510                 extra = wpabuf_len(p2p->wfd_ie_assoc_req);
2511 #endif /* CONFIG_WIFI_DISPLAY */
2512
2513         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2514                 extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2515
2516         /*
2517          * (Re)Association Request - P2P IE
2518          * P2P Capability attribute (shall be present)
2519          * Extended Listen Timing (may be present)
2520          * P2P Device Info attribute (shall be present)
2521          */
2522         tmp = wpabuf_alloc(200 + extra);
2523         if (tmp == NULL)
2524                 return -1;
2525
2526 #ifdef CONFIG_WIFI_DISPLAY
2527         if (p2p->wfd_ie_assoc_req)
2528                 wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
2529 #endif /* CONFIG_WIFI_DISPLAY */
2530
2531         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
2532                 wpabuf_put_buf(tmp,
2533                                p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);
2534
2535         peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
2536
2537         lpos = p2p_buf_add_ie_hdr(tmp);
2538         p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
2539         if (p2p->ext_listen_interval)
2540                 p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
2541                                               p2p->ext_listen_interval);
2542         p2p_buf_add_device_info(tmp, p2p, peer);
2543         p2p_buf_update_ie_hdr(tmp, lpos);
2544
2545         tmplen = wpabuf_len(tmp);
2546         if (tmplen > len)
2547                 res = -1;
2548         else {
2549                 os_memcpy(buf, wpabuf_head(tmp), tmplen);
2550                 res = tmplen;
2551         }
2552         wpabuf_free(tmp);
2553
2554         return res;
2555 }
2556
2557
2558 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
2559 {
2560         struct wpabuf *p2p_ie;
2561         int ret;
2562
2563         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
2564         if (p2p_ie == NULL)
2565                 return 0;
2566
2567         ret = p2p_attr_text(p2p_ie, buf, end);
2568         wpabuf_free(p2p_ie);
2569         return ret;
2570 }
2571
2572
2573 struct p2ps_advertisement *
2574 p2p_service_p2ps_id(struct p2p_data *p2p, u32 adv_id)
2575 {
2576         struct p2ps_advertisement *adv_data;
2577
2578         if (!p2p)
2579                 return NULL;
2580
2581         adv_data = p2p->p2ps_adv_list;
2582         while (adv_data) {
2583                 if (adv_data->id == adv_id)
2584                         return adv_data;
2585                 adv_data = adv_data->next;
2586         }
2587
2588         return NULL;
2589 }
2590
2591
2592 int p2p_service_del_asp(struct p2p_data *p2p, u32 adv_id)
2593 {
2594         struct p2ps_advertisement *adv_data;
2595         struct p2ps_advertisement **prior;
2596
2597         if (!p2p)
2598                 return -1;
2599
2600         adv_data = p2p->p2ps_adv_list;
2601         prior = &p2p->p2ps_adv_list;
2602         while (adv_data) {
2603                 if (adv_data->id == adv_id) {
2604                         p2p_dbg(p2p, "Delete ASP adv_id=0x%x", adv_id);
2605                         *prior = adv_data->next;
2606                         os_free(adv_data);
2607                         return 0;
2608                 }
2609                 prior = &adv_data->next;
2610                 adv_data = adv_data->next;
2611         }
2612
2613         return -1;
2614 }
2615
2616
2617 int p2p_service_add_asp(struct p2p_data *p2p, int auto_accept, u32 adv_id,
2618                         const char *adv_str, u8 svc_state, u16 config_methods,
2619                         const char *svc_info)
2620 {
2621         struct p2ps_advertisement *adv_data, *tmp, **prev;
2622         u8 buf[P2PS_HASH_LEN];
2623         size_t adv_data_len, adv_len, info_len = 0;
2624
2625         if (!p2p || !adv_str || !adv_str[0])
2626                 return -1;
2627
2628         if (!(config_methods & p2p->cfg->config_methods)) {
2629                 p2p_dbg(p2p, "Config methods not supported svc: 0x%x dev: 0x%x",
2630                         config_methods, p2p->cfg->config_methods);
2631                 return -1;
2632         }
2633
2634         if (!p2ps_gen_hash(p2p, adv_str, buf))
2635                 return -1;
2636
2637         if (svc_info)
2638                 info_len = os_strlen(svc_info);
2639         adv_len = os_strlen(adv_str);
2640         adv_data_len = sizeof(struct p2ps_advertisement) + adv_len + 1 +
2641                 info_len + 1;
2642
2643         adv_data = os_zalloc(adv_data_len);
2644         if (!adv_data)
2645                 return -1;
2646
2647         os_memcpy(adv_data->hash, buf, P2PS_HASH_LEN);
2648         adv_data->id = adv_id;
2649         adv_data->state = svc_state;
2650         adv_data->config_methods = config_methods & p2p->cfg->config_methods;
2651         adv_data->auto_accept = (u8) auto_accept;
2652         os_memcpy(adv_data->svc_name, adv_str, adv_len);
2653
2654         if (svc_info && info_len) {
2655                 adv_data->svc_info = &adv_data->svc_name[adv_len + 1];
2656                 os_memcpy(adv_data->svc_info, svc_info, info_len);
2657         }
2658
2659         /*
2660          * Group Advertisements by service string. They do not need to be
2661          * sorted, but groups allow easier Probe Response instance grouping
2662          */
2663         tmp = p2p->p2ps_adv_list;
2664         prev = &p2p->p2ps_adv_list;
2665         while (tmp) {
2666                 if (tmp->id == adv_data->id) {
2667                         if (os_strcmp(tmp->svc_name, adv_data->svc_name) != 0) {
2668                                 os_free(adv_data);
2669                                 return -1;
2670                         }
2671                         adv_data->next = tmp->next;
2672                         *prev = adv_data;
2673                         os_free(tmp);
2674                         goto inserted;
2675                 } else {
2676                         if (os_strcmp(tmp->svc_name, adv_data->svc_name) == 0) {
2677                                 adv_data->next = tmp->next;
2678                                 tmp->next = adv_data;
2679                                 goto inserted;
2680                         }
2681                 }
2682                 prev = &tmp->next;
2683                 tmp = tmp->next;
2684         }
2685
2686         /* No svc_name match found */
2687         adv_data->next = p2p->p2ps_adv_list;
2688         p2p->p2ps_adv_list = adv_data;
2689
2690 inserted:
2691         p2p_dbg(p2p,
2692                 "Added ASP advertisement adv_id=0x%x config_methods=0x%x svc_state=0x%x adv_str='%s'",
2693                 adv_id, adv_data->config_methods, svc_state, adv_str);
2694
2695         return 0;
2696 }
2697
2698
2699 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
2700 {
2701         struct p2p_message msg;
2702
2703         os_memset(&msg, 0, sizeof(msg));
2704         if (p2p_parse_p2p_ie(p2p_ie, &msg))
2705                 return -1;
2706
2707         if (msg.p2p_device_addr) {
2708                 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
2709                 return 0;
2710         } else if (msg.device_id) {
2711                 os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
2712                 return 0;
2713         }
2714         return -1;
2715 }
2716
2717
2718 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
2719 {
2720         struct wpabuf *p2p_ie;
2721         int ret;
2722
2723         p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
2724                                              P2P_IE_VENDOR_TYPE);
2725         if (p2p_ie == NULL)
2726                 return -1;
2727         ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
2728         wpabuf_free(p2p_ie);
2729         return ret;
2730 }
2731
2732
2733 static void p2p_clear_go_neg(struct p2p_data *p2p)
2734 {
2735         p2p->go_neg_peer = NULL;
2736         p2p_clear_timeout(p2p);
2737         p2p_set_state(p2p, P2P_IDLE);
2738 }
2739
2740
2741 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
2742 {
2743         if (p2p->go_neg_peer == NULL) {
2744                 p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
2745                 return; /* No pending Group Formation */
2746         }
2747
2748         if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
2749             0) {
2750                 p2p_dbg(p2p, "Ignore WPS registration success notification for "
2751                         MACSTR " (GO Negotiation peer " MACSTR ")",
2752                         MAC2STR(mac_addr),
2753                         MAC2STR(p2p->go_neg_peer->intended_addr));
2754                 return; /* Ignore unexpected peer address */
2755         }
2756
2757         p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
2758                 MAC2STR(mac_addr));
2759
2760         p2p_clear_go_neg(p2p);
2761 }
2762
2763
2764 void p2p_group_formation_failed(struct p2p_data *p2p)
2765 {
2766         if (p2p->go_neg_peer == NULL) {
2767                 p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
2768                 return; /* No pending Group Formation */
2769         }
2770
2771         p2p_dbg(p2p, "Group Formation failed with " MACSTR,
2772                 MAC2STR(p2p->go_neg_peer->intended_addr));
2773
2774         p2p_clear_go_neg(p2p);
2775 }
2776
2777
2778 struct p2p_data * p2p_init(const struct p2p_config *cfg)
2779 {
2780         struct p2p_data *p2p;
2781
2782         if (cfg->max_peers < 1 ||
2783             cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
2784                 return NULL;
2785
2786         p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
2787         if (p2p == NULL)
2788                 return NULL;
2789         p2p->cfg = (struct p2p_config *) (p2p + 1);
2790         os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
2791         if (cfg->dev_name)
2792                 p2p->cfg->dev_name = os_strdup(cfg->dev_name);
2793         if (cfg->manufacturer)
2794                 p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
2795         if (cfg->model_name)
2796                 p2p->cfg->model_name = os_strdup(cfg->model_name);
2797         if (cfg->model_number)
2798                 p2p->cfg->model_number = os_strdup(cfg->model_number);
2799         if (cfg->serial_number)
2800                 p2p->cfg->serial_number = os_strdup(cfg->serial_number);
2801         if (cfg->pref_chan) {
2802                 p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
2803                                                 sizeof(struct p2p_channel));
2804                 if (p2p->cfg->pref_chan) {
2805                         os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
2806                                   cfg->num_pref_chan *
2807                                   sizeof(struct p2p_channel));
2808                 } else
2809                         p2p->cfg->num_pref_chan = 0;
2810         }
2811
2812         p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash);
2813
2814         p2p->min_disc_int = 1;
2815         p2p->max_disc_int = 3;
2816         p2p->max_disc_tu = -1;
2817
2818         if (os_get_random(&p2p->next_tie_breaker, 1) < 0)
2819                 p2p->next_tie_breaker = 0;
2820         p2p->next_tie_breaker &= 0x01;
2821         if (cfg->sd_request)
2822                 p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
2823         p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
2824         if (cfg->concurrent_operations)
2825                 p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
2826         p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
2827
2828         dl_list_init(&p2p->devices);
2829
2830         eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
2831                                p2p_expiration_timeout, p2p, NULL);
2832
2833         p2p->go_timeout = 100;
2834         p2p->client_timeout = 20;
2835         p2p->num_p2p_sd_queries = 0;
2836
2837         p2p_dbg(p2p, "initialized");
2838         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
2839         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
2840
2841         return p2p;
2842 }
2843
2844
2845 void p2p_deinit(struct p2p_data *p2p)
2846 {
2847         struct p2ps_advertisement *adv, *prev;
2848
2849 #ifdef CONFIG_WIFI_DISPLAY
2850         wpabuf_free(p2p->wfd_ie_beacon);
2851         wpabuf_free(p2p->wfd_ie_probe_req);
2852         wpabuf_free(p2p->wfd_ie_probe_resp);
2853         wpabuf_free(p2p->wfd_ie_assoc_req);
2854         wpabuf_free(p2p->wfd_ie_invitation);
2855         wpabuf_free(p2p->wfd_ie_prov_disc_req);
2856         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
2857         wpabuf_free(p2p->wfd_ie_go_neg);
2858         wpabuf_free(p2p->wfd_dev_info);
2859         wpabuf_free(p2p->wfd_assoc_bssid);
2860         wpabuf_free(p2p->wfd_coupled_sink_info);
2861 #endif /* CONFIG_WIFI_DISPLAY */
2862
2863         eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
2864         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
2865         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
2866         eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
2867         eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2868         p2p_flush(p2p);
2869         p2p_free_req_dev_types(p2p);
2870         os_free(p2p->cfg->dev_name);
2871         os_free(p2p->cfg->manufacturer);
2872         os_free(p2p->cfg->model_name);
2873         os_free(p2p->cfg->model_number);
2874         os_free(p2p->cfg->serial_number);
2875         os_free(p2p->cfg->pref_chan);
2876         os_free(p2p->groups);
2877         wpabuf_free(p2p->sd_resp);
2878         os_free(p2p->after_scan_tx);
2879         p2p_remove_wps_vendor_extensions(p2p);
2880         os_free(p2p->no_go_freq.range);
2881
2882         adv = p2p->p2ps_adv_list;
2883         while (adv) {
2884                 prev = adv;
2885                 adv = adv->next;
2886                 os_free(prev);
2887         }
2888
2889         os_free(p2p);
2890 }
2891
2892
2893 void p2p_flush(struct p2p_data *p2p)
2894 {
2895         struct p2p_device *dev, *prev;
2896         p2p_stop_find(p2p);
2897         dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
2898                               list) {
2899                 dl_list_del(&dev->list);
2900                 p2p_device_free(p2p, dev);
2901         }
2902         p2p_free_sd_queries(p2p);
2903         os_free(p2p->after_scan_tx);
2904         p2p->after_scan_tx = NULL;
2905 }
2906
2907
2908 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
2909 {
2910         struct p2p_device *dev;
2911
2912         dev = p2p_get_device(p2p, addr);
2913         if (dev == NULL)
2914                 return -1;
2915
2916         p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
2917
2918         if (p2p->go_neg_peer == dev) {
2919                 eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
2920                 p2p->go_neg_peer = NULL;
2921         }
2922
2923         dev->wps_method = WPS_NOT_READY;
2924         dev->oob_pw_id = 0;
2925         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
2926         dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
2927
2928         /* Check if after_scan_tx is for this peer. If so free it */
2929         if (p2p->after_scan_tx &&
2930             os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
2931                 os_free(p2p->after_scan_tx);
2932                 p2p->after_scan_tx = NULL;
2933         }
2934
2935         return 0;
2936 }
2937
2938
2939 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
2940 {
2941         os_free(p2p->cfg->dev_name);
2942         if (dev_name) {
2943                 p2p->cfg->dev_name = os_strdup(dev_name);
2944                 if (p2p->cfg->dev_name == NULL)
2945                         return -1;
2946         } else
2947                 p2p->cfg->dev_name = NULL;
2948         return 0;
2949 }
2950
2951
2952 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
2953 {
2954         os_free(p2p->cfg->manufacturer);
2955         p2p->cfg->manufacturer = NULL;
2956         if (manufacturer) {
2957                 p2p->cfg->manufacturer = os_strdup(manufacturer);
2958                 if (p2p->cfg->manufacturer == NULL)
2959                         return -1;
2960         }
2961
2962         return 0;
2963 }
2964
2965
2966 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
2967 {
2968         os_free(p2p->cfg->model_name);
2969         p2p->cfg->model_name = NULL;
2970         if (model_name) {
2971                 p2p->cfg->model_name = os_strdup(model_name);
2972                 if (p2p->cfg->model_name == NULL)
2973                         return -1;
2974         }
2975
2976         return 0;
2977 }
2978
2979
2980 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
2981 {
2982         os_free(p2p->cfg->model_number);
2983         p2p->cfg->model_number = NULL;
2984         if (model_number) {
2985                 p2p->cfg->model_number = os_strdup(model_number);
2986                 if (p2p->cfg->model_number == NULL)
2987                         return -1;
2988         }
2989
2990         return 0;
2991 }
2992
2993
2994 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
2995 {
2996         os_free(p2p->cfg->serial_number);
2997         p2p->cfg->serial_number = NULL;
2998         if (serial_number) {
2999                 p2p->cfg->serial_number = os_strdup(serial_number);
3000                 if (p2p->cfg->serial_number == NULL)
3001                         return -1;
3002         }
3003
3004         return 0;
3005 }
3006
3007
3008 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
3009 {
3010         p2p->cfg->config_methods = config_methods;
3011 }
3012
3013
3014 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
3015 {
3016         os_memcpy(p2p->cfg->uuid, uuid, 16);
3017 }
3018
3019
3020 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
3021 {
3022         os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
3023         return 0;
3024 }
3025
3026
3027 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
3028                           size_t num_dev_types)
3029 {
3030         if (num_dev_types > P2P_SEC_DEVICE_TYPES)
3031                 num_dev_types = P2P_SEC_DEVICE_TYPES;
3032         p2p->cfg->num_sec_dev_types = num_dev_types;
3033         os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
3034         return 0;
3035 }
3036
3037
3038 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
3039 {
3040         int i;
3041
3042         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3043                 wpabuf_free(p2p->wps_vendor_ext[i]);
3044                 p2p->wps_vendor_ext[i] = NULL;
3045         }
3046 }
3047
3048
3049 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
3050                                  const struct wpabuf *vendor_ext)
3051 {
3052         int i;
3053
3054         if (vendor_ext == NULL)
3055                 return -1;
3056
3057         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
3058                 if (p2p->wps_vendor_ext[i] == NULL)
3059                         break;
3060         }
3061         if (i >= P2P_MAX_WPS_VENDOR_EXT)
3062                 return -1;
3063
3064         p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
3065         if (p2p->wps_vendor_ext[i] == NULL)
3066                 return -1;
3067
3068         return 0;
3069 }
3070
3071
3072 int p2p_set_country(struct p2p_data *p2p, const char *country)
3073 {
3074         os_memcpy(p2p->cfg->country, country, 3);
3075         return 0;
3076 }
3077
3078
3079 static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev)
3080 {
3081         if (dev->sd_pending_bcast_queries == 0) {
3082                 /* Initialize with total number of registered broadcast
3083                  * SD queries. */
3084                 dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
3085         }
3086
3087         if (p2p_start_sd(p2p, dev) == 0)
3088                 return 1;
3089
3090         if (dev->req_config_methods &&
3091             !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
3092                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3093                         MACSTR " (config methods 0x%x)",
3094                         MAC2STR(dev->info.p2p_device_addr),
3095                         dev->req_config_methods);
3096                 if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
3097                         return 1;
3098         }
3099
3100         return 0;
3101 }
3102
3103
3104 void p2p_continue_find(struct p2p_data *p2p)
3105 {
3106         struct p2p_device *dev;
3107         int found;
3108
3109         p2p_set_state(p2p, P2P_SEARCH);
3110
3111         /* Continue from the device following the last iteration */
3112         found = 0;
3113         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3114                 if (dev == p2p->last_p2p_find_oper) {
3115                         found = 1;
3116                         continue;
3117                 }
3118                 if (!found)
3119                         continue;
3120                 if (p2p_pre_find_operation(p2p, dev) > 0) {
3121                         p2p->last_p2p_find_oper = dev;
3122                         return;
3123                 }
3124         }
3125
3126         /*
3127          * Wrap around to the beginning of the list and continue until the last
3128          * iteration device.
3129          */
3130         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3131                 if (p2p_pre_find_operation(p2p, dev) > 0) {
3132                         p2p->last_p2p_find_oper = dev;
3133                         return;
3134                 }
3135                 if (dev == p2p->last_p2p_find_oper)
3136                         break;
3137         }
3138
3139         p2p_listen_in_find(p2p, 1);
3140 }
3141
3142
3143 static void p2p_sd_cb(struct p2p_data *p2p, int success)
3144 {
3145         p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
3146                 success);
3147         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3148
3149         if (!success) {
3150                 if (p2p->sd_peer)
3151                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3152                 p2p->sd_peer = NULL;
3153                 p2p_continue_find(p2p);
3154                 return;
3155         }
3156
3157         if (p2p->sd_peer == NULL) {
3158                 p2p_dbg(p2p, "No SD peer entry known");
3159                 p2p_continue_find(p2p);
3160                 return;
3161         }
3162
3163         if (p2p->sd_query && p2p->sd_query->for_all_peers) {
3164                 /* Update the pending broadcast SD query count for this device
3165                  */
3166                 p2p->sd_peer->sd_pending_bcast_queries--;
3167
3168                 /*
3169                  * If there are no pending broadcast queries for this device,
3170                  * mark it as done (-1).
3171                  */
3172                 if (p2p->sd_peer->sd_pending_bcast_queries == 0)
3173                         p2p->sd_peer->sd_pending_bcast_queries = -1;
3174         }
3175
3176         /* Wait for response from the peer */
3177         p2p_set_state(p2p, P2P_SD_DURING_FIND);
3178         p2p_set_timeout(p2p, 0, 200000);
3179 }
3180
3181
3182 /**
3183  * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
3184  * @p2p: P2P module context from p2p_init()
3185  */
3186 static void p2p_retry_pd(struct p2p_data *p2p)
3187 {
3188         struct p2p_device *dev;
3189
3190         if (p2p->state != P2P_IDLE)
3191                 return;
3192
3193         /*
3194          * Retry the prov disc req attempt only for the peer that the user had
3195          * requested.
3196          */
3197
3198         dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3199                 if (os_memcmp(p2p->pending_pd_devaddr,
3200                               dev->info.p2p_device_addr, ETH_ALEN) != 0)
3201                         continue;
3202                 if (!dev->req_config_methods)
3203                         continue;
3204
3205                 p2p_dbg(p2p, "Send pending Provision Discovery Request to "
3206                         MACSTR " (config methods 0x%x)",
3207                         MAC2STR(dev->info.p2p_device_addr),
3208                         dev->req_config_methods);
3209                 p2p_send_prov_disc_req(p2p, dev,
3210                                        dev->flags & P2P_DEV_PD_FOR_JOIN,
3211                                        p2p->pd_force_freq);
3212                 return;
3213         }
3214 }
3215
3216
3217 static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
3218 {
3219         p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
3220                 success);
3221
3222         /*
3223          * Postpone resetting the pending action state till after we actually
3224          * time out. This allows us to take some action like notifying any
3225          * interested parties about no response to the request.
3226          *
3227          * When the timer (below) goes off we check in IDLE, SEARCH, or
3228          * LISTEN_ONLY state, which are the only allowed states to issue a PD
3229          * requests in, if this was still pending and then raise notification.
3230          */
3231
3232         if (!success) {
3233                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3234
3235                 if (p2p->user_initiated_pd &&
3236                     (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
3237                 {
3238                         /* Retry request from timeout to avoid busy loops */
3239                         p2p->pending_action_state = P2P_PENDING_PD;
3240                         p2p_set_timeout(p2p, 0, 50000);
3241                 } else if (p2p->state != P2P_IDLE)
3242                         p2p_continue_find(p2p);
3243                 else if (p2p->user_initiated_pd) {
3244                         p2p->pending_action_state = P2P_PENDING_PD;
3245                         p2p_set_timeout(p2p, 0, 300000);
3246                 }
3247                 return;
3248         }
3249
3250         /*
3251          * This postponing, of resetting pending_action_state, needs to be
3252          * done only for user initiated PD requests and not internal ones.
3253          */
3254         if (p2p->user_initiated_pd)
3255                 p2p->pending_action_state = P2P_PENDING_PD;
3256         else
3257                 p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3258
3259         /* Wait for response from the peer */
3260         if (p2p->state == P2P_SEARCH)
3261                 p2p_set_state(p2p, P2P_PD_DURING_FIND);
3262         p2p_set_timeout(p2p, 0, 200000);
3263 }
3264
3265
3266 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
3267                          struct os_reltime *rx_time, int level, const u8 *ies,
3268                          size_t ies_len)
3269 {
3270         if (os_reltime_before(rx_time, &p2p->find_start)) {
3271                 /*
3272                  * The driver may have cached (e.g., in cfg80211 BSS table) the
3273                  * scan results for relatively long time. To avoid reporting
3274                  * stale information, update P2P peers only based on results
3275                  * that have based on frames received after the last p2p_find
3276                  * operation was started.
3277                  */
3278                 p2p_dbg(p2p, "Ignore old scan result for " MACSTR
3279                         " (rx_time=%u.%06u)",
3280                         MAC2STR(bssid), (unsigned int) rx_time->sec,
3281                         (unsigned int) rx_time->usec);
3282                 return 0;
3283         }
3284
3285         p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
3286
3287         return 0;
3288 }
3289
3290
3291 void p2p_scan_res_handled(struct p2p_data *p2p)
3292 {
3293         if (!p2p->p2p_scan_running) {
3294                 p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
3295         }
3296         p2p->p2p_scan_running = 0;
3297         eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
3298
3299         if (p2p_run_after_scan(p2p))
3300                 return;
3301         if (p2p->state == P2P_SEARCH)
3302                 p2p_continue_find(p2p);
3303 }
3304
3305
3306 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
3307 {
3308         u8 dev_capab;
3309         u8 *len;
3310
3311 #ifdef CONFIG_WIFI_DISPLAY
3312         if (p2p->wfd_ie_probe_req)
3313                 wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
3314 #endif /* CONFIG_WIFI_DISPLAY */
3315
3316         if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3317                 wpabuf_put_buf(ies,
3318                                p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3319
3320         len = p2p_buf_add_ie_hdr(ies);
3321
3322         dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
3323
3324         /* P2PS requires Probe Request frames to include SD bit */
3325         if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3326                 dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
3327
3328         p2p_buf_add_capability(ies, dev_capab, 0);
3329
3330         if (dev_id)
3331                 p2p_buf_add_device_id(ies, dev_id);
3332         if (p2p->cfg->reg_class && p2p->cfg->channel)
3333                 p2p_buf_add_listen_channel(ies, p2p->cfg->country,
3334                                            p2p->cfg->reg_class,
3335                                            p2p->cfg->channel);
3336         if (p2p->ext_listen_interval)
3337                 p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
3338                                               p2p->ext_listen_interval);
3339
3340         if (p2p->p2ps_seek && p2p->p2ps_seek_count)
3341                 p2p_buf_add_service_hash(ies, p2p);
3342
3343         /* TODO: p2p_buf_add_operating_channel() if GO */
3344         p2p_buf_update_ie_hdr(ies, len);
3345 }
3346
3347
3348 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
3349 {
3350         size_t len = 100;
3351
3352 #ifdef CONFIG_WIFI_DISPLAY
3353         if (p2p && p2p->wfd_ie_probe_req)
3354                 len += wpabuf_len(p2p->wfd_ie_probe_req);
3355 #endif /* CONFIG_WIFI_DISPLAY */
3356
3357         if (p2p && p2p->vendor_elem &&
3358             p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
3359                 len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);
3360
3361         return len;
3362 }
3363
3364
3365 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
3366 {
3367         return p2p_attr_text(p2p_ie, buf, end);
3368 }
3369
3370
3371 static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
3372 {
3373         struct p2p_device *dev = p2p->go_neg_peer;
3374         int timeout;
3375
3376         p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
3377
3378         if (dev == NULL) {
3379                 p2p_dbg(p2p, "No pending GO Negotiation");
3380                 return;
3381         }
3382
3383         if (success) {
3384                 if (dev->flags & P2P_DEV_USER_REJECTED) {
3385                         p2p_set_state(p2p, P2P_IDLE);
3386                         return;
3387                 }
3388         } else if (dev->go_neg_req_sent) {
3389                 /* Cancel the increment from p2p_connect_send() on failure */
3390                 dev->go_neg_req_sent--;
3391         }
3392
3393         if (!success &&
3394             (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
3395             !is_zero_ether_addr(dev->member_in_go_dev)) {
3396                 p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
3397                         MAC2STR(dev->info.p2p_device_addr));
3398                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3399                 p2p_send_dev_disc_req(p2p, dev);
3400                 return;
3401         }
3402
3403         /*
3404          * Use P2P find, if needed, to find the other device from its listen
3405          * channel.
3406          */
3407         p2p_set_state(p2p, P2P_CONNECT);
3408         timeout = success ? 500000 : 100000;
3409         if (!success && p2p->go_neg_peer &&
3410             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
3411                 unsigned int r;
3412                 /*
3413                  * Peer is expected to wait our response and we will skip the
3414                  * listen phase. Add some randomness to the wait time here to
3415                  * make it less likely to hit cases where we could end up in
3416                  * sync with peer not listening.
3417                  */
3418                 if (os_get_random((u8 *) &r, sizeof(r)) < 0)
3419                         r = 0;
3420                 timeout += r % 100000;
3421         }
3422         p2p_set_timeout(p2p, 0, timeout);
3423 }
3424
3425
3426 static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
3427 {
3428         p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
3429                 success);
3430         if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
3431                 p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
3432                 return;
3433         }
3434         p2p_set_state(p2p, P2P_CONNECT);
3435         p2p_set_timeout(p2p, 0, 500000);
3436 }
3437
3438
3439 static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
3440                                        const u8 *addr)
3441 {
3442         p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
3443         if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
3444                 p2p_go_neg_failed(p2p, p2p->go_neg_peer->status);
3445         } else if (success) {
3446                 struct p2p_device *dev;
3447                 dev = p2p_get_device(p2p, addr);
3448                 if (dev &&
3449                     dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
3450                         dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
3451         }
3452 }
3453
3454
3455 static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
3456                                enum p2p_send_action_result result)
3457 {
3458         struct p2p_device *dev;
3459
3460         p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
3461         if (result == P2P_SEND_ACTION_FAILED) {
3462                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3463                 p2p_go_neg_failed(p2p, -1);
3464                 return;
3465         }
3466
3467         dev = p2p->go_neg_peer;
3468
3469         if (result == P2P_SEND_ACTION_NO_ACK) {
3470                 /*
3471                  * Retry GO Negotiation Confirmation
3472                  * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
3473                  * ACK for confirmation.
3474                  */
3475                 if (dev && dev->go_neg_conf &&
3476                     dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
3477                         p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
3478                                 dev->go_neg_conf_sent);
3479                         p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
3480                         if (p2p_send_action(p2p, dev->go_neg_conf_freq,
3481                                             dev->info.p2p_device_addr,
3482                                             p2p->cfg->dev_addr,
3483                                             dev->info.p2p_device_addr,
3484                                             wpabuf_head(dev->go_neg_conf),
3485                                             wpabuf_len(dev->go_neg_conf), 0) >=
3486                             0) {
3487                                 dev->go_neg_conf_sent++;
3488                                 return;
3489                         }
3490                         p2p_dbg(p2p, "Failed to re-send Action frame");
3491
3492                         /*
3493                          * Continue with the assumption that the first attempt
3494                          * went through and just the ACK frame was lost.
3495                          */
3496                 }
3497
3498                 /*
3499                  * It looks like the TX status for GO Negotiation Confirm is
3500                  * often showing failure even when the peer has actually
3501                  * received the frame. Since the peer may change channels
3502                  * immediately after having received the frame, we may not see
3503                  * an Ack for retries, so just dropping a single frame may
3504                  * trigger this. To allow the group formation to succeed if the
3505                  * peer did indeed receive the frame, continue regardless of
3506                  * the TX status.
3507                  */
3508                 p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
3509         }
3510
3511         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3512
3513         if (dev == NULL)
3514                 return;
3515
3516         p2p_go_complete(p2p, dev);
3517 }
3518
3519
3520 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
3521                         const u8 *src, const u8 *bssid,
3522                         enum p2p_send_action_result result)
3523 {
3524         enum p2p_pending_action_state state;
3525         int success;
3526
3527         p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
3528                 " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)",
3529                 p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
3530                 MAC2STR(bssid), result, p2p_state_txt(p2p->state));
3531         success = result == P2P_SEND_ACTION_SUCCESS;
3532         state = p2p->pending_action_state;
3533         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3534         switch (state) {
3535         case P2P_NO_PENDING_ACTION:
3536                 if (p2p->send_action_in_progress) {
3537                         p2p->send_action_in_progress = 0;
3538                         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3539                 }
3540                 if (p2p->after_scan_tx_in_progress) {
3541                         p2p->after_scan_tx_in_progress = 0;
3542                         if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
3543                             p2p_run_after_scan(p2p))
3544                                 break;
3545                         if (p2p->state == P2P_SEARCH) {
3546                                 p2p_dbg(p2p, "Continue find after after_scan_tx completion");
3547                                 p2p_continue_find(p2p);
3548                         }
3549                 }
3550                 break;
3551         case P2P_PENDING_GO_NEG_REQUEST:
3552                 p2p_go_neg_req_cb(p2p, success);
3553                 break;
3554         case P2P_PENDING_GO_NEG_RESPONSE:
3555                 p2p_go_neg_resp_cb(p2p, success);
3556                 break;
3557         case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
3558                 p2p_go_neg_resp_failure_cb(p2p, success, dst);
3559                 break;
3560         case P2P_PENDING_GO_NEG_CONFIRM:
3561                 p2p_go_neg_conf_cb(p2p, result);
3562                 break;
3563         case P2P_PENDING_SD:
3564                 p2p_sd_cb(p2p, success);
3565                 break;
3566         case P2P_PENDING_PD:
3567                 p2p_prov_disc_cb(p2p, success);
3568                 break;
3569         case P2P_PENDING_INVITATION_REQUEST:
3570                 p2p_invitation_req_cb(p2p, success);
3571                 break;
3572         case P2P_PENDING_INVITATION_RESPONSE:
3573                 p2p_invitation_resp_cb(p2p, success);
3574                 break;
3575         case P2P_PENDING_DEV_DISC_REQUEST:
3576                 p2p_dev_disc_req_cb(p2p, success);
3577                 break;
3578         case P2P_PENDING_DEV_DISC_RESPONSE:
3579                 p2p_dev_disc_resp_cb(p2p, success);
3580                 break;
3581         case P2P_PENDING_GO_DISC_REQ:
3582                 p2p_go_disc_req_cb(p2p, success);
3583                 break;
3584         }
3585
3586         p2p->after_scan_tx_in_progress = 0;
3587 }
3588
3589
3590 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
3591                    unsigned int duration)
3592 {
3593         if (freq == p2p->pending_client_disc_freq) {
3594                 p2p_dbg(p2p, "Client discoverability remain-awake completed");
3595                 p2p->pending_client_disc_freq = 0;
3596                 return;
3597         }
3598
3599         if (freq != p2p->pending_listen_freq) {
3600                 p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
3601                         freq, duration, p2p->pending_listen_freq);
3602                 return;
3603         }
3604
3605         p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
3606                 p2p->pending_listen_sec, p2p->pending_listen_usec,
3607                 p2p->pending_listen_freq);
3608         p2p->in_listen = 1;
3609         p2p->drv_in_listen = freq;
3610         if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
3611                 /*
3612                  * Add 20 msec extra wait to avoid race condition with driver
3613                  * remain-on-channel end event, i.e., give driver more time to
3614                  * complete the operation before our timeout expires.
3615                  */
3616                 p2p_set_timeout(p2p, p2p->pending_listen_sec,
3617                                 p2p->pending_listen_usec + 20000);
3618         }
3619
3620         p2p->pending_listen_freq = 0;
3621 }
3622
3623
3624 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
3625 {
3626         p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
3627         p2p->drv_in_listen = 0;
3628         if (p2p->in_listen)
3629                 return 0; /* Internal timeout will trigger the next step */
3630
3631         if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
3632                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3633                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3634                         p2p_go_neg_failed(p2p, -1);
3635                         return 0;
3636                 }
3637
3638                 p2p_set_state(p2p, P2P_CONNECT);
3639                 p2p_connect_send(p2p, p2p->go_neg_peer);
3640                 return 1;
3641         } else if (p2p->state == P2P_SEARCH) {
3642                 if (p2p->p2p_scan_running) {
3643                          /*
3644                           * Search is already in progress. This can happen if
3645                           * an Action frame RX is reported immediately after
3646                           * the end of a remain-on-channel operation and the
3647                           * response frame to that is sent using an offchannel
3648                           * operation while in p2p_find. Avoid an attempt to
3649                           * restart a scan here.
3650                           */
3651                         p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
3652                         return 1;
3653                 }
3654                 if (p2p->pending_listen_freq) {
3655                         /*
3656                          * Better wait a bit if the driver is unable to start
3657                          * offchannel operation for some reason. p2p_search()
3658                          * will be started from internal timeout.
3659                          */
3660                         p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
3661                         p2p_set_timeout(p2p, 0, 100000);
3662                         return 1;
3663                 }
3664                 if (p2p->search_delay) {
3665                         p2p_dbg(p2p, "Delay search operation by %u ms",
3666                                 p2p->search_delay);
3667                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3668                                         (p2p->search_delay % 1000) * 1000);
3669                         return 1;
3670                 }
3671                 p2p_search(p2p);
3672                 return 1;
3673         }
3674
3675         return 0;
3676 }
3677
3678
3679 static void p2p_timeout_connect(struct p2p_data *p2p)
3680 {
3681         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3682         if (p2p->go_neg_peer &&
3683             (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
3684                 p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
3685                 p2p_go_neg_failed(p2p, -1);
3686                 return;
3687         }
3688         if (p2p->go_neg_peer &&
3689             (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
3690             p2p->go_neg_peer->connect_reqs < 120) {
3691                 p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
3692                 p2p_connect_send(p2p, p2p->go_neg_peer);
3693                 return;
3694         }
3695         if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
3696                 p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
3697                 p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3698                 p2p_set_timeout(p2p, 0, 30000);
3699                 return;
3700         }
3701         p2p_set_state(p2p, P2P_CONNECT_LISTEN);
3702         p2p_listen_in_find(p2p, 0);
3703 }
3704
3705
3706 static void p2p_timeout_connect_listen(struct p2p_data *p2p)
3707 {
3708         if (p2p->go_neg_peer) {
3709                 if (p2p->drv_in_listen) {
3710                         p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
3711                         return;
3712                 }
3713
3714                 if (p2p->go_neg_peer->connect_reqs >= 120) {
3715                         p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
3716                         p2p_go_neg_failed(p2p, -1);
3717                         return;
3718                 }
3719
3720                 p2p_set_state(p2p, P2P_CONNECT);
3721                 p2p_connect_send(p2p, p2p->go_neg_peer);
3722         } else
3723                 p2p_set_state(p2p, P2P_IDLE);
3724 }
3725
3726
3727 static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
3728 {
3729         p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
3730
3731         if (p2p->cfg->is_concurrent_session_active &&
3732             p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
3733                 p2p_set_timeout(p2p, 0, 500000);
3734         else
3735                 p2p_set_timeout(p2p, 0, 200000);
3736 }
3737
3738
3739 static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
3740 {
3741         struct p2p_device *dev = p2p->go_neg_peer;
3742
3743         if (dev == NULL) {
3744                 p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
3745                 return;
3746         }
3747
3748         p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
3749         p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
3750         p2p_listen_in_find(p2p, 0);
3751 }
3752
3753
3754 static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
3755 {
3756         p2p_dbg(p2p, "Service Discovery Query timeout");
3757         if (p2p->sd_peer) {
3758                 p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3759                 p2p->sd_peer = NULL;
3760         }
3761         p2p_continue_find(p2p);
3762 }
3763
3764
3765 static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
3766 {
3767         p2p_dbg(p2p, "Provision Discovery Request timeout");
3768         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3769         p2p_continue_find(p2p);
3770 }
3771
3772
3773 static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
3774 {
3775         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
3776
3777         /*
3778          * For user initiated PD requests that we have not gotten any responses
3779          * for while in IDLE state, we retry them a couple of times before
3780          * giving up.
3781          */
3782         if (!p2p->user_initiated_pd)
3783                 return;
3784
3785         p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
3786
3787         if (p2p->pd_retries) {
3788                 p2p->pd_retries--;
3789                 p2p_retry_pd(p2p);
3790         } else {
3791                 struct p2p_device *dev;
3792                 int for_join = 0;
3793
3794                 dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
3795                         if (os_memcmp(p2p->pending_pd_devaddr,
3796                                       dev->info.p2p_device_addr, ETH_ALEN) != 0)
3797                                 continue;
3798                         if (dev->req_config_methods &&
3799                             (dev->flags & P2P_DEV_PD_FOR_JOIN))
3800                                 for_join = 1;
3801                 }
3802
3803                 if (p2p->cfg->prov_disc_fail)
3804                         p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
3805                                                  p2p->pending_pd_devaddr,
3806                                                  for_join ?
3807                                                  P2P_PROV_DISC_TIMEOUT_JOIN :
3808                                                  P2P_PROV_DISC_TIMEOUT);
3809                 p2p_reset_pending_pd(p2p);
3810         }
3811 }
3812
3813
3814 static void p2p_timeout_invite(struct p2p_data *p2p)
3815 {
3816         p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
3817         p2p_set_state(p2p, P2P_INVITE_LISTEN);
3818         if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
3819                 /*
3820                  * Better remain on operating channel instead of listen channel
3821                  * when running a group.
3822                  */
3823                 p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
3824                 p2p_set_timeout(p2p, 0, 100000);
3825                 return;
3826         }
3827         p2p_listen_in_find(p2p, 0);
3828 }
3829
3830
3831 static void p2p_timeout_invite_listen(struct p2p_data *p2p)
3832 {
3833         if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
3834                 p2p_set_state(p2p, P2P_INVITE);
3835                 p2p_invite_send(p2p, p2p->invite_peer,
3836                                 p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
3837         } else {
3838                 if (p2p->invite_peer) {
3839                         p2p_dbg(p2p, "Invitation Request retry limit reached");
3840                         if (p2p->cfg->invitation_result)
3841                                 p2p->cfg->invitation_result(
3842                                         p2p->cfg->cb_ctx, -1, NULL, NULL,
3843                                         p2p->invite_peer->info.p2p_device_addr,
3844                                         0, 0);
3845                 }
3846                 p2p_set_state(p2p, P2P_IDLE);
3847         }
3848 }
3849
3850
3851 static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
3852 {
3853         struct p2p_data *p2p = eloop_ctx;
3854
3855         p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
3856
3857         p2p->in_listen = 0;
3858         if (p2p->drv_in_listen) {
3859                 p2p_dbg(p2p, "Driver is still in listen state - stop it");
3860                 p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
3861         }
3862
3863         switch (p2p->state) {
3864         case P2P_IDLE:
3865                 /* Check if we timed out waiting for PD req */
3866                 if (p2p->pending_action_state == P2P_PENDING_PD)
3867                         p2p_timeout_prov_disc_req(p2p);
3868                 break;
3869         case P2P_SEARCH:
3870                 /* Check if we timed out waiting for PD req */
3871                 if (p2p->pending_action_state == P2P_PENDING_PD)
3872                         p2p_timeout_prov_disc_req(p2p);
3873                 if (p2p->search_delay && !p2p->in_search_delay) {
3874                         p2p_dbg(p2p, "Delay search operation by %u ms",
3875                                 p2p->search_delay);
3876                         p2p->in_search_delay = 1;
3877                         p2p_set_timeout(p2p, p2p->search_delay / 1000,
3878                                         (p2p->search_delay % 1000) * 1000);
3879                         break;
3880                 }
3881                 p2p->in_search_delay = 0;
3882                 p2p_search(p2p);
3883                 break;
3884         case P2P_CONNECT:
3885                 p2p_timeout_connect(p2p);
3886                 break;
3887         case P2P_CONNECT_LISTEN:
3888                 p2p_timeout_connect_listen(p2p);
3889                 break;
3890         case P2P_GO_NEG:
3891                 break;
3892         case P2P_LISTEN_ONLY:
3893                 /* Check if we timed out waiting for PD req */
3894                 if (p2p->pending_action_state == P2P_PENDING_PD)
3895                         p2p_timeout_prov_disc_req(p2p);
3896
3897                 if (p2p->ext_listen_only) {
3898                         p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
3899                         p2p->ext_listen_only = 0;
3900                         p2p_set_state(p2p, P2P_IDLE);
3901                 }
3902                 break;
3903         case P2P_WAIT_PEER_CONNECT:
3904                 p2p_timeout_wait_peer_connect(p2p);
3905                 break;
3906         case P2P_WAIT_PEER_IDLE:
3907                 p2p_timeout_wait_peer_idle(p2p);
3908                 break;
3909         case P2P_SD_DURING_FIND:
3910                 p2p_timeout_sd_during_find(p2p);
3911                 break;
3912         case P2P_PROVISIONING:
3913                 break;
3914         case P2P_PD_DURING_FIND:
3915                 p2p_timeout_prov_disc_during_find(p2p);
3916                 break;
3917         case P2P_INVITE:
3918                 p2p_timeout_invite(p2p);
3919                 break;
3920         case P2P_INVITE_LISTEN:
3921                 p2p_timeout_invite_listen(p2p);
3922                 break;
3923         }
3924 }
3925
3926
3927 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
3928 {
3929         struct p2p_device *dev;
3930
3931         dev = p2p_get_device(p2p, peer_addr);
3932         p2p_dbg(p2p, "Local request to reject connection attempts by peer "
3933                 MACSTR, MAC2STR(peer_addr));
3934         if (dev == NULL) {
3935                 p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
3936                 return -1;
3937         }
3938         dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
3939         dev->flags |= P2P_DEV_USER_REJECTED;
3940         return 0;
3941 }
3942
3943
3944 const char * p2p_wps_method_text(enum p2p_wps_method method)
3945 {
3946         switch (method) {
3947         case WPS_NOT_READY:
3948                 return "not-ready";
3949         case WPS_PIN_DISPLAY:
3950                 return "Display";
3951         case WPS_PIN_KEYPAD:
3952                 return "Keypad";
3953         case WPS_PBC:
3954                 return "PBC";
3955         case WPS_NFC:
3956                 return "NFC";
3957         case WPS_P2PS:
3958                 return "P2PS";
3959         }
3960
3961         return "??";
3962 }
3963
3964
3965 static const char * p2p_go_state_text(enum p2p_go_state go_state)
3966 {
3967         switch (go_state) {
3968         case UNKNOWN_GO:
3969                 return "unknown";
3970         case LOCAL_GO:
3971                 return "local";
3972         case  REMOTE_GO:
3973                 return "remote";
3974         }
3975
3976         return "??";
3977 }
3978
3979
3980 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
3981                                                const u8 *addr, int next)
3982 {
3983         struct p2p_device *dev;
3984
3985         if (addr)
3986                 dev = p2p_get_device(p2p, addr);
3987         else
3988                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
3989
3990         if (dev && next) {
3991                 dev = dl_list_first(&dev->list, struct p2p_device, list);
3992                 if (&dev->list == &p2p->devices)
3993                         dev = NULL;
3994         }
3995
3996         if (dev == NULL)
3997                 return NULL;
3998
3999         return &dev->info;
4000 }
4001
4002
4003 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
4004                           char *buf, size_t buflen)
4005 {
4006         struct p2p_device *dev;
4007         int res;
4008         char *pos, *end;
4009         struct os_reltime now;
4010
4011         if (info == NULL)
4012                 return -1;
4013
4014         dev = (struct p2p_device *) (((u8 *) info) -
4015                                      offsetof(struct p2p_device, info));
4016
4017         pos = buf;
4018         end = buf + buflen;
4019
4020         os_get_reltime(&now);
4021         res = os_snprintf(pos, end - pos,
4022                           "age=%d\n"
4023                           "listen_freq=%d\n"
4024                           "wps_method=%s\n"
4025                           "interface_addr=" MACSTR "\n"
4026                           "member_in_go_dev=" MACSTR "\n"
4027                           "member_in_go_iface=" MACSTR "\n"
4028                           "go_neg_req_sent=%d\n"
4029                           "go_state=%s\n"
4030                           "dialog_token=%u\n"
4031                           "intended_addr=" MACSTR "\n"
4032                           "country=%c%c\n"
4033                           "oper_freq=%d\n"
4034                           "req_config_methods=0x%x\n"
4035                           "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
4036                           "status=%d\n"
4037                           "invitation_reqs=%u\n",
4038                           (int) (now.sec - dev->last_seen.sec),
4039                           dev->listen_freq,
4040                           p2p_wps_method_text(dev->wps_method),
4041                           MAC2STR(dev->interface_addr),
4042                           MAC2STR(dev->member_in_go_dev),
4043                           MAC2STR(dev->member_in_go_iface),
4044                           dev->go_neg_req_sent,
4045                           p2p_go_state_text(dev->go_state),
4046                           dev->dialog_token,
4047                           MAC2STR(dev->intended_addr),
4048                           dev->country[0] ? dev->country[0] : '_',
4049                           dev->country[1] ? dev->country[1] : '_',
4050                           dev->oper_freq,
4051                           dev->req_config_methods,
4052                           dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
4053                           "[PROBE_REQ_ONLY]" : "",
4054                           dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
4055                           dev->flags & P2P_DEV_NOT_YET_READY ?
4056                           "[NOT_YET_READY]" : "",
4057                           dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
4058                           "[PD_PEER_DISPLAY]" : "",
4059                           dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
4060                           "[PD_PEER_KEYPAD]" : "",
4061                           dev->flags & P2P_DEV_USER_REJECTED ?
4062                           "[USER_REJECTED]" : "",
4063                           dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
4064                           "[PEER_WAITING_RESPONSE]" : "",
4065                           dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
4066                           "[PREFER_PERSISTENT_GROUP]" : "",
4067                           dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
4068                           "[WAIT_GO_NEG_RESPONSE]" : "",
4069                           dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
4070                           "[WAIT_GO_NEG_CONFIRM]" : "",
4071                           dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
4072                           "[GROUP_CLIENT_ONLY]" : "",
4073                           dev->flags & P2P_DEV_FORCE_FREQ ?
4074                           "[FORCE_FREQ]" : "",
4075                           dev->flags & P2P_DEV_PD_FOR_JOIN ?
4076                           "[PD_FOR_JOIN]" : "",
4077                           dev->status,
4078                           dev->invitation_reqs);
4079         if (os_snprintf_error(end - pos, res))
4080                 return pos - buf;
4081         pos += res;
4082
4083         if (dev->ext_listen_period) {
4084                 res = os_snprintf(pos, end - pos,
4085                                   "ext_listen_period=%u\n"
4086                                   "ext_listen_interval=%u\n",
4087                                   dev->ext_listen_period,
4088                                   dev->ext_listen_interval);
4089                 if (os_snprintf_error(end - pos, res))
4090                         return pos - buf;
4091                 pos += res;
4092         }
4093
4094         if (dev->oper_ssid_len) {
4095                 res = os_snprintf(pos, end - pos,
4096                                   "oper_ssid=%s\n",
4097                                   wpa_ssid_txt(dev->oper_ssid,
4098                                                dev->oper_ssid_len));
4099                 if (os_snprintf_error(end - pos, res))
4100                         return pos - buf;
4101                 pos += res;
4102         }
4103
4104 #ifdef CONFIG_WIFI_DISPLAY
4105         if (dev->info.wfd_subelems) {
4106                 res = os_snprintf(pos, end - pos, "wfd_subelems=");
4107                 if (os_snprintf_error(end - pos, res))
4108                         return pos - buf;
4109                 pos += res;
4110
4111                 pos += wpa_snprintf_hex(pos, end - pos,
4112                                         wpabuf_head(dev->info.wfd_subelems),
4113                                         wpabuf_len(dev->info.wfd_subelems));
4114
4115                 res = os_snprintf(pos, end - pos, "\n");
4116                 if (os_snprintf_error(end - pos, res))
4117                         return pos - buf;
4118                 pos += res;
4119         }
4120 #endif /* CONFIG_WIFI_DISPLAY */
4121
4122         return pos - buf;
4123 }
4124
4125
4126 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
4127 {
4128         return p2p_get_device(p2p, addr) != NULL;
4129 }
4130
4131
4132 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
4133 {
4134         if (enabled) {
4135                 p2p_dbg(p2p, "Client discoverability enabled");
4136                 p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4137         } else {
4138                 p2p_dbg(p2p, "Client discoverability disabled");
4139                 p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
4140         }
4141 }
4142
4143
4144 static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
4145                                               u32 duration2, u32 interval2)
4146 {
4147         struct wpabuf *req;
4148         struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
4149         u8 *len;
4150
4151         req = wpabuf_alloc(100);
4152         if (req == NULL)
4153                 return NULL;
4154
4155         if (duration1 || interval1) {
4156                 os_memset(&desc1, 0, sizeof(desc1));
4157                 desc1.count_type = 1;
4158                 desc1.duration = duration1;
4159                 desc1.interval = interval1;
4160                 ptr1 = &desc1;
4161
4162                 if (duration2 || interval2) {
4163                         os_memset(&desc2, 0, sizeof(desc2));
4164                         desc2.count_type = 2;
4165                         desc2.duration = duration2;
4166                         desc2.interval = interval2;
4167                         ptr2 = &desc2;
4168                 }
4169         }
4170
4171         p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
4172         len = p2p_buf_add_ie_hdr(req);
4173         p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
4174         p2p_buf_update_ie_hdr(req, len);
4175
4176         return req;
4177 }
4178
4179
4180 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
4181                      const u8 *own_interface_addr, unsigned int freq,
4182                      u32 duration1, u32 interval1, u32 duration2,
4183                      u32 interval2)
4184 {
4185         struct wpabuf *req;
4186
4187         p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
4188                 " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
4189                 "dur2=%u int2=%u",
4190                 MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
4191                 freq, duration1, interval1, duration2, interval2);
4192
4193         req = p2p_build_presence_req(duration1, interval1, duration2,
4194                                      interval2);
4195         if (req == NULL)
4196                 return -1;
4197
4198         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4199         if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
4200                             go_interface_addr,
4201                             wpabuf_head(req), wpabuf_len(req), 200) < 0) {
4202                 p2p_dbg(p2p, "Failed to send Action frame");
4203         }
4204         wpabuf_free(req);
4205
4206         return 0;
4207 }
4208
4209
4210 static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
4211                                                size_t noa_len, u8 dialog_token)
4212 {
4213         struct wpabuf *resp;
4214         u8 *len;
4215
4216         resp = wpabuf_alloc(100 + noa_len);
4217         if (resp == NULL)
4218                 return NULL;
4219
4220         p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
4221         len = p2p_buf_add_ie_hdr(resp);
4222         p2p_buf_add_status(resp, status);
4223         if (noa) {
4224                 wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
4225                 wpabuf_put_le16(resp, noa_len);
4226                 wpabuf_put_data(resp, noa, noa_len);
4227         } else
4228                 p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
4229         p2p_buf_update_ie_hdr(resp, len);
4230
4231         return resp;
4232 }
4233
4234
4235 static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
4236                                      const u8 *sa, const u8 *data, size_t len,
4237                                      int rx_freq)
4238 {
4239         struct p2p_message msg;
4240         u8 status;
4241         struct wpabuf *resp;
4242         size_t g;
4243         struct p2p_group *group = NULL;
4244         int parsed = 0;
4245         u8 noa[50];
4246         int noa_len;
4247
4248         p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
4249
4250         for (g = 0; g < p2p->num_groups; g++) {
4251                 if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
4252                               ETH_ALEN) == 0) {
4253                         group = p2p->groups[g];
4254                         break;
4255                 }
4256         }
4257         if (group == NULL) {
4258                 p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
4259                         MACSTR, MAC2STR(da));
4260                 return;
4261         }
4262
4263         if (p2p_parse(data, len, &msg) < 0) {
4264                 p2p_dbg(p2p, "Failed to parse P2P Presence Request");
4265                 status = P2P_SC_FAIL_INVALID_PARAMS;
4266                 goto fail;
4267         }
4268         parsed = 1;
4269
4270         if (msg.noa == NULL) {
4271                 p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
4272                 status = P2P_SC_FAIL_INVALID_PARAMS;
4273                 goto fail;
4274         }
4275
4276         status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
4277
4278 fail:
4279         if (p2p->cfg->get_noa)
4280                 noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
4281                                             sizeof(noa));
4282         else
4283                 noa_len = -1;
4284         resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
4285                                        noa_len > 0 ? noa_len : 0,
4286                                        msg.dialog_token);
4287         if (parsed)
4288                 p2p_parse_free(&msg);
4289         if (resp == NULL)
4290                 return;
4291
4292         p2p->pending_action_state = P2P_NO_PENDING_ACTION;
4293         if (p2p_send_action(p2p, rx_freq, sa, da, da,
4294                             wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
4295                 p2p_dbg(p2p, "Failed to send Action frame");
4296         }
4297         wpabuf_free(resp);
4298 }
4299
4300
4301 static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
4302                                       const u8 *sa, const u8 *data, size_t len)
4303 {
4304         struct p2p_message msg;
4305
4306         p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
4307
4308         if (p2p_parse(data, len, &msg) < 0) {
4309                 p2p_dbg(p2p, "Failed to parse P2P Presence Response");
4310                 return;
4311         }
4312
4313         if (msg.status == NULL || msg.noa == NULL) {
4314                 p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
4315                 p2p_parse_free(&msg);
4316                 return;
4317         }
4318
4319         if (p2p->cfg->presence_resp) {
4320                 p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
4321                                         msg.noa, msg.noa_len);
4322         }
4323
4324         if (*msg.status) {
4325                 p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
4326                         *msg.status);
4327                 p2p_parse_free(&msg);
4328                 return;
4329         }
4330
4331         p2p_dbg(p2p, "P2P Presence Request was accepted");
4332         wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
4333                     msg.noa, msg.noa_len);
4334         /* TODO: process NoA */
4335         p2p_parse_free(&msg);
4336 }
4337
4338
4339 static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
4340 {
4341         struct p2p_data *p2p = eloop_ctx;
4342
4343         if (p2p->ext_listen_interval) {
4344                 /* Schedule next extended listen timeout */
4345                 eloop_register_timeout(p2p->ext_listen_interval_sec,
4346                                        p2p->ext_listen_interval_usec,
4347                                        p2p_ext_listen_timeout, p2p, NULL);
4348         }
4349
4350         if ((p2p->cfg->is_p2p_in_progress &&
4351              p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
4352             (p2p->pending_action_state == P2P_PENDING_PD &&
4353              p2p->pd_retries > 0)) {
4354                 p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
4355                         p2p_state_txt(p2p->state));
4356                 return;
4357         }
4358
4359         if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
4360                 /*
4361                  * This should not really happen, but it looks like the Listen
4362                  * command may fail is something else (e.g., a scan) was
4363                  * running at an inconvenient time. As a workaround, allow new
4364                  * Extended Listen operation to be started.
4365                  */
4366                 p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
4367                 p2p->ext_listen_only = 0;
4368                 p2p_set_state(p2p, P2P_IDLE);
4369         }
4370
4371         if (p2p->state != P2P_IDLE) {
4372                 p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
4373                 return;
4374         }
4375
4376         p2p_dbg(p2p, "Extended Listen timeout");
4377         p2p->ext_listen_only = 1;
4378         if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
4379                 p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
4380                 p2p->ext_listen_only = 0;
4381         }
4382 }
4383
4384
4385 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
4386                    unsigned int interval)
4387 {
4388         if (period > 65535 || interval > 65535 || period > interval ||
4389             (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
4390                 p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
4391                         period, interval);
4392                 return -1;
4393         }
4394
4395         eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
4396
4397         if (interval == 0) {
4398                 p2p_dbg(p2p, "Disabling Extended Listen Timing");
4399                 p2p->ext_listen_period = 0;
4400                 p2p->ext_listen_interval = 0;
4401                 return 0;
4402         }
4403
4404         p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
4405                 period, interval);
4406         p2p->ext_listen_period = period;
4407         p2p->ext_listen_interval = interval;
4408         p2p->ext_listen_interval_sec = interval / 1000;
4409         p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
4410
4411         eloop_register_timeout(p2p->ext_listen_interval_sec,
4412                                p2p->ext_listen_interval_usec,
4413                                p2p_ext_listen_timeout, p2p, NULL);
4414
4415         return 0;
4416 }
4417
4418
4419 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4420                       const u8 *ie, size_t ie_len)
4421 {
4422         struct p2p_message msg;
4423
4424         if (bssid == NULL || ie == NULL)
4425                 return;
4426
4427         os_memset(&msg, 0, sizeof(msg));
4428         if (p2p_parse_ies(ie, ie_len, &msg))
4429                 return;
4430         if (msg.minor_reason_code == NULL) {
4431                 p2p_parse_free(&msg);
4432                 return;
4433         }
4434
4435         p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
4436                 " reason_code=%u minor_reason_code=%u",
4437                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4438
4439         p2p_parse_free(&msg);
4440 }
4441
4442
4443 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
4444                         const u8 *ie, size_t ie_len)
4445 {
4446         struct p2p_message msg;
4447
4448         if (bssid == NULL || ie == NULL)
4449                 return;
4450
4451         os_memset(&msg, 0, sizeof(msg));
4452         if (p2p_parse_ies(ie, ie_len, &msg))
4453                 return;
4454         if (msg.minor_reason_code == NULL) {
4455                 p2p_parse_free(&msg);
4456                 return;
4457         }
4458
4459         p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
4460                 " reason_code=%u minor_reason_code=%u",
4461                 MAC2STR(bssid), reason_code, *msg.minor_reason_code);
4462
4463         p2p_parse_free(&msg);
4464 }
4465
4466
4467 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
4468 {
4469         if (enabled) {
4470                 p2p_dbg(p2p, "Managed P2P Device operations enabled");
4471                 p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
4472         } else {
4473                 p2p_dbg(p2p, "Managed P2P Device operations disabled");
4474                 p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
4475         }
4476 }
4477
4478
4479 int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class,
4480                                  u8 *op_channel)
4481 {
4482         return p2p_channel_random_social(&p2p->channels, op_class, op_channel);
4483 }
4484
4485
4486 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
4487                            u8 forced)
4488 {
4489         if (p2p_channel_to_freq(reg_class, channel) < 0)
4490                 return -1;
4491
4492         p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
4493                 reg_class, channel);
4494
4495         /*
4496          * Listen channel was set in configuration or set by control interface;
4497          * cannot override it.
4498          */
4499         if (p2p->cfg->channel_forced && forced == 0)
4500                 return -1;
4501
4502         if (p2p->state == P2P_IDLE) {
4503                 p2p->cfg->reg_class = reg_class;
4504                 p2p->cfg->channel = channel;
4505                 p2p->cfg->channel_forced = forced;
4506         } else {
4507                 p2p_dbg(p2p, "Defer setting listen channel");
4508                 p2p->pending_reg_class = reg_class;
4509                 p2p->pending_channel = channel;
4510                 p2p->pending_channel_forced = forced;
4511         }
4512
4513         return 0;
4514 }
4515
4516
4517 u8 p2p_get_listen_channel(struct p2p_data *p2p)
4518 {
4519         return p2p->cfg->channel;
4520 }
4521
4522
4523 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
4524 {
4525         p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
4526         if (postfix == NULL) {
4527                 p2p->cfg->ssid_postfix_len = 0;
4528                 return 0;
4529         }
4530         if (len > sizeof(p2p->cfg->ssid_postfix))
4531                 return -1;
4532         os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
4533         p2p->cfg->ssid_postfix_len = len;
4534         return 0;
4535 }
4536
4537
4538 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
4539                          int cfg_op_channel)
4540 {
4541         if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
4542                 return -1;
4543
4544         p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
4545                 op_reg_class, op_channel);
4546         p2p->cfg->op_reg_class = op_reg_class;
4547         p2p->cfg->op_channel = op_channel;
4548         p2p->cfg->cfg_op_channel = cfg_op_channel;
4549         return 0;
4550 }
4551
4552
4553 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
4554                       const struct p2p_channel *pref_chan)
4555 {
4556         struct p2p_channel *n;
4557
4558         if (pref_chan) {
4559                 n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
4560                 if (n == NULL)
4561                         return -1;
4562                 os_memcpy(n, pref_chan,
4563                           num_pref_chan * sizeof(struct p2p_channel));
4564         } else
4565                 n = NULL;
4566
4567         os_free(p2p->cfg->pref_chan);
4568         p2p->cfg->pref_chan = n;
4569         p2p->cfg->num_pref_chan = num_pref_chan;
4570
4571         return 0;
4572 }
4573
4574
4575 int p2p_set_no_go_freq(struct p2p_data *p2p,
4576                        const struct wpa_freq_range_list *list)
4577 {
4578         struct wpa_freq_range *tmp;
4579
4580         if (list == NULL || list->num == 0) {
4581                 os_free(p2p->no_go_freq.range);
4582                 p2p->no_go_freq.range = NULL;
4583                 p2p->no_go_freq.num = 0;
4584                 return 0;
4585         }
4586
4587         tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
4588         if (tmp == NULL)
4589                 return -1;
4590         os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
4591         os_free(p2p->no_go_freq.range);
4592         p2p->no_go_freq.range = tmp;
4593         p2p->no_go_freq.num = list->num;
4594         p2p_dbg(p2p, "Updated no GO chan list");
4595
4596         return 0;
4597 }
4598
4599
4600 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
4601                            u8 *iface_addr)
4602 {
4603         struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
4604         if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
4605                 return -1;
4606         os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
4607         return 0;
4608 }
4609
4610
4611 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
4612                            u8 *dev_addr)
4613 {
4614         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4615         if (dev == NULL)
4616                 return -1;
4617         os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
4618         return 0;
4619 }
4620
4621
4622 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
4623 {
4624         os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
4625         if (is_zero_ether_addr(p2p->peer_filter))
4626                 p2p_dbg(p2p, "Disable peer filter");
4627         else
4628                 p2p_dbg(p2p, "Enable peer filter for " MACSTR,
4629                         MAC2STR(p2p->peer_filter));
4630 }
4631
4632
4633 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
4634 {
4635         p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
4636         if (p2p->cross_connect == enabled)
4637                 return;
4638         p2p->cross_connect = enabled;
4639         /* TODO: may need to tear down any action group where we are GO(?) */
4640 }
4641
4642
4643 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
4644 {
4645         struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
4646         if (dev == NULL)
4647                 return -1;
4648         if (dev->oper_freq <= 0)
4649                 return -1;
4650         return dev->oper_freq;
4651 }
4652
4653
4654 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
4655 {
4656         p2p_dbg(p2p, "Intra BSS distribution %s",
4657                 enabled ? "enabled" : "disabled");
4658         p2p->cfg->p2p_intra_bss = enabled;
4659 }
4660
4661
4662 void p2p_update_channel_list(struct p2p_data *p2p,
4663                              const struct p2p_channels *chan,
4664                              const struct p2p_channels *cli_chan)
4665 {
4666         p2p_dbg(p2p, "Update channel list");
4667         os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
4668         p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
4669         os_memcpy(&p2p->cfg->cli_channels, cli_chan,
4670                   sizeof(struct p2p_channels));
4671         p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
4672 }
4673
4674
4675 int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
4676                     const u8 *src, const u8 *bssid, const u8 *buf,
4677                     size_t len, unsigned int wait_time)
4678 {
4679         if (p2p->p2p_scan_running) {
4680                 p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
4681                 if (p2p->after_scan_tx) {
4682                         p2p_dbg(p2p, "Dropped previous pending Action frame TX");
4683                         os_free(p2p->after_scan_tx);
4684                 }
4685                 p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
4686                                                len);
4687                 if (p2p->after_scan_tx == NULL)
4688                         return -1;
4689                 p2p->after_scan_tx->freq = freq;
4690                 os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
4691                 os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
4692                 os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
4693                 p2p->after_scan_tx->len = len;
4694                 p2p->after_scan_tx->wait_time = wait_time;
4695                 os_memcpy(p2p->after_scan_tx + 1, buf, len);
4696                 return 0;
4697         }
4698
4699         return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
4700                                      buf, len, wait_time);
4701 }
4702
4703
4704 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
4705                            int freq_overall)
4706 {
4707         p2p_dbg(p2p, "Best channel: 2.4 GHz: %d,  5 GHz: %d,  overall: %d",
4708                 freq_24, freq_5, freq_overall);
4709         p2p->best_freq_24 = freq_24;
4710         p2p->best_freq_5 = freq_5;
4711         p2p->best_freq_overall = freq_overall;
4712 }
4713
4714
4715 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
4716 {
4717         p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
4718         p2p->own_freq_preference = freq;
4719 }
4720
4721
4722 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
4723 {
4724         if (p2p == NULL || p2p->go_neg_peer == NULL)
4725                 return NULL;
4726         return p2p->go_neg_peer->info.p2p_device_addr;
4727 }
4728
4729
4730 const struct p2p_peer_info *
4731 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
4732 {
4733         struct p2p_device *dev;
4734
4735         if (addr) {
4736                 dev = p2p_get_device(p2p, addr);
4737                 if (!dev)
4738                         return NULL;
4739
4740                 if (!next) {
4741                         if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
4742                                 return NULL;
4743
4744                         return &dev->info;
4745                 } else {
4746                         do {
4747                                 dev = dl_list_first(&dev->list,
4748                                                     struct p2p_device,
4749                                                     list);
4750                                 if (!dev || &dev->list == &p2p->devices)
4751                                         return NULL;
4752                         } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
4753                 }
4754         } else {
4755                 dev = dl_list_first(&p2p->devices, struct p2p_device, list);
4756                 if (!dev)
4757                         return NULL;
4758                 while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
4759                         dev = dl_list_first(&dev->list,
4760                                             struct p2p_device,
4761                                             list);
4762                         if (!dev || &dev->list == &p2p->devices)
4763                                 return NULL;
4764                 }
4765         }
4766
4767         return &dev->info;
4768 }
4769
4770
4771 int p2p_in_progress(struct p2p_data *p2p)
4772 {
4773         if (p2p == NULL)
4774                 return 0;
4775         if (p2p->state == P2P_SEARCH)
4776                 return 2;
4777         return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
4778 }
4779
4780
4781 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
4782                             u8 client_timeout)
4783 {
4784         if (p2p) {
4785                 p2p->go_timeout = go_timeout;
4786                 p2p->client_timeout = client_timeout;
4787         }
4788 }
4789
4790
4791 #ifdef CONFIG_WIFI_DISPLAY
4792
4793 static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
4794 {
4795         size_t g;
4796         struct p2p_group *group;
4797
4798         for (g = 0; g < p2p->num_groups; g++) {
4799                 group = p2p->groups[g];
4800                 p2p_group_force_beacon_update_ies(group);
4801         }
4802 }
4803
4804
4805 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
4806 {
4807         wpabuf_free(p2p->wfd_ie_beacon);
4808         p2p->wfd_ie_beacon = ie;
4809         p2p_update_wfd_ie_groups(p2p);
4810         return 0;
4811 }
4812
4813
4814 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
4815 {
4816         wpabuf_free(p2p->wfd_ie_probe_req);
4817         p2p->wfd_ie_probe_req = ie;
4818         return 0;
4819 }
4820
4821
4822 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
4823 {
4824         wpabuf_free(p2p->wfd_ie_probe_resp);
4825         p2p->wfd_ie_probe_resp = ie;
4826         p2p_update_wfd_ie_groups(p2p);
4827         return 0;
4828 }
4829
4830
4831 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
4832 {
4833         wpabuf_free(p2p->wfd_ie_assoc_req);
4834         p2p->wfd_ie_assoc_req = ie;
4835         return 0;
4836 }
4837
4838
4839 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
4840 {
4841         wpabuf_free(p2p->wfd_ie_invitation);
4842         p2p->wfd_ie_invitation = ie;
4843         return 0;
4844 }
4845
4846
4847 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
4848 {
4849         wpabuf_free(p2p->wfd_ie_prov_disc_req);
4850         p2p->wfd_ie_prov_disc_req = ie;
4851         return 0;
4852 }
4853
4854
4855 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
4856 {
4857         wpabuf_free(p2p->wfd_ie_prov_disc_resp);
4858         p2p->wfd_ie_prov_disc_resp = ie;
4859         return 0;
4860 }
4861
4862
4863 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
4864 {
4865         wpabuf_free(p2p->wfd_ie_go_neg);
4866         p2p->wfd_ie_go_neg = ie;
4867         return 0;
4868 }
4869
4870
4871 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
4872 {
4873         wpabuf_free(p2p->wfd_dev_info);
4874         if (elem) {
4875                 p2p->wfd_dev_info = wpabuf_dup(elem);
4876                 if (p2p->wfd_dev_info == NULL)
4877                         return -1;
4878         } else
4879                 p2p->wfd_dev_info = NULL;
4880
4881         return 0;
4882 }
4883
4884
4885 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
4886 {
4887         wpabuf_free(p2p->wfd_assoc_bssid);
4888         if (elem) {
4889                 p2p->wfd_assoc_bssid = wpabuf_dup(elem);
4890                 if (p2p->wfd_assoc_bssid == NULL)
4891                         return -1;
4892         } else
4893                 p2p->wfd_assoc_bssid = NULL;
4894
4895         return 0;
4896 }
4897
4898
4899 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
4900                                   const struct wpabuf *elem)
4901 {
4902         wpabuf_free(p2p->wfd_coupled_sink_info);
4903         if (elem) {
4904                 p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
4905                 if (p2p->wfd_coupled_sink_info == NULL)
4906                         return -1;
4907         } else
4908                 p2p->wfd_coupled_sink_info = NULL;
4909
4910         return 0;
4911 }
4912
4913 #endif /* CONFIG_WIFI_DISPLAY */
4914
4915
4916 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
4917                      int max_disc_tu)
4918 {
4919         if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
4920                 return -1;
4921
4922         p2p->min_disc_int = min_disc_int;
4923         p2p->max_disc_int = max_disc_int;
4924         p2p->max_disc_tu = max_disc_tu;
4925         p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
4926                 min_disc_int, max_disc_int, max_disc_tu);
4927
4928         return 0;
4929 }
4930
4931
4932 void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
4933 {
4934         va_list ap;
4935         char buf[500];
4936
4937         if (!p2p->cfg->debug_print)
4938                 return;
4939
4940         va_start(ap, fmt);
4941         vsnprintf(buf, sizeof(buf), fmt, ap);
4942         buf[sizeof(buf) - 1] = '\0';
4943         va_end(ap);
4944         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
4945 }
4946
4947
4948 void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
4949 {
4950         va_list ap;
4951         char buf[500];
4952
4953         if (!p2p->cfg->debug_print)
4954                 return;
4955
4956         va_start(ap, fmt);
4957         vsnprintf(buf, sizeof(buf), fmt, ap);
4958         buf[sizeof(buf) - 1] = '\0';
4959         va_end(ap);
4960         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
4961 }
4962
4963
4964 void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
4965 {
4966         va_list ap;
4967         char buf[500];
4968
4969         if (!p2p->cfg->debug_print)
4970                 return;
4971
4972         va_start(ap, fmt);
4973         vsnprintf(buf, sizeof(buf), fmt, ap);
4974         buf[sizeof(buf) - 1] = '\0';
4975         va_end(ap);
4976         p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
4977 }
4978
4979
4980 void p2p_loop_on_known_peers(struct p2p_data *p2p,
4981                              void (*peer_callback)(struct p2p_peer_info *peer,
4982                                                    void *user_data),
4983                              void *user_data)
4984 {
4985         struct p2p_device *dev, *n;
4986
4987         dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
4988                 peer_callback(&dev->info, user_data);
4989         }
4990 }
4991
4992
4993 #ifdef CONFIG_WPS_NFC
4994
4995 static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
4996                                               int client_freq,
4997                                               const u8 *go_dev_addr,
4998                                               const u8 *ssid, size_t ssid_len)
4999 {
5000         struct wpabuf *buf;
5001         u8 op_class, channel;
5002         enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
5003
5004         buf = wpabuf_alloc(1000);
5005         if (buf == NULL)
5006                 return NULL;
5007
5008         op_class = p2p->cfg->reg_class;
5009         channel = p2p->cfg->channel;
5010
5011         p2p_buf_add_capability(buf, p2p->dev_capab &
5012                                ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
5013         p2p_buf_add_device_info(buf, p2p, NULL);
5014
5015         if (p2p->num_groups > 0) {
5016                 int freq = p2p_group_get_freq(p2p->groups[0]);
5017                 role = P2P_GO_IN_A_GROUP;
5018                 if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
5019                         p2p_dbg(p2p,
5020                                 "Unknown GO operating frequency %d MHz for NFC handover",
5021                                 freq);
5022                         wpabuf_free(buf);
5023                         return NULL;
5024                 }
5025         } else if (client_freq > 0) {
5026                 role = P2P_CLIENT_IN_A_GROUP;
5027                 if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
5028                         p2p_dbg(p2p,
5029                                 "Unknown client operating frequency %d MHz for NFC handover",
5030                                 client_freq);
5031                         wpabuf_free(buf);
5032                         return NULL;
5033                 }
5034         }
5035
5036         p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
5037                                        channel, role);
5038
5039         if (p2p->num_groups > 0) {
5040                 /* Limit number of clients to avoid very long message */
5041                 p2p_buf_add_group_info(p2p->groups[0], buf, 5);
5042                 p2p_group_buf_add_id(p2p->groups[0], buf);
5043         } else if (client_freq > 0 &&
5044                    go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
5045                    ssid && ssid_len > 0) {
5046                 /*
5047                  * Add the optional P2P Group ID to indicate in which group this
5048                  * device is a P2P Client.
5049                  */
5050                 p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
5051         }
5052
5053         return buf;
5054 }
5055
5056
5057 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
5058                                            int client_freq,
5059                                            const u8 *go_dev_addr,
5060                                            const u8 *ssid, size_t ssid_len)
5061 {
5062         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5063                                       ssid_len);
5064 }
5065
5066
5067 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
5068                                            int client_freq,
5069                                            const u8 *go_dev_addr,
5070                                            const u8 *ssid, size_t ssid_len)
5071 {
5072         return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
5073                                       ssid_len);
5074 }
5075
5076
5077 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
5078                                         struct p2p_nfc_params *params)
5079 {
5080         struct p2p_message msg;
5081         struct p2p_device *dev;
5082         const u8 *p2p_dev_addr;
5083         int freq;
5084         enum p2p_role_indication role;
5085
5086         params->next_step = NO_ACTION;
5087
5088         if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
5089                                    params->p2p_attr, params->p2p_len, &msg)) {
5090                 p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
5091                 p2p_parse_free(&msg);
5092                 return -1;
5093         }
5094
5095         if (msg.p2p_device_addr)
5096                 p2p_dev_addr = msg.p2p_device_addr;
5097         else if (msg.device_id)
5098                 p2p_dev_addr = msg.device_id;
5099         else {
5100                 p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
5101                 p2p_parse_free(&msg);
5102                 return -1;
5103         }
5104
5105         if (msg.oob_dev_password) {
5106                 os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
5107                           msg.oob_dev_password_len);
5108                 params->oob_dev_pw_len = msg.oob_dev_password_len;
5109         }
5110
5111         dev = p2p_create_device(p2p, p2p_dev_addr);
5112         if (dev == NULL) {
5113                 p2p_parse_free(&msg);
5114                 return -1;
5115         }
5116
5117         params->peer = &dev->info;
5118
5119         os_get_reltime(&dev->last_seen);
5120         dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
5121         p2p_copy_wps_info(p2p, dev, 0, &msg);
5122
5123         if (!msg.oob_go_neg_channel) {
5124                 p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
5125                 return -1;
5126         }
5127
5128         if (msg.oob_go_neg_channel[3] == 0 &&
5129             msg.oob_go_neg_channel[4] == 0)
5130                 freq = 0;
5131         else
5132                 freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
5133                                            msg.oob_go_neg_channel[4]);
5134         if (freq < 0) {
5135                 p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
5136                 return -1;
5137         }
5138         role = msg.oob_go_neg_channel[5];
5139
5140         if (role == P2P_GO_IN_A_GROUP) {
5141                 p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
5142                 params->go_freq = freq;
5143         } else if (role == P2P_CLIENT_IN_A_GROUP) {
5144                 p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
5145                         freq);
5146                 params->go_freq = freq;
5147         } else
5148                 p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
5149         dev->oob_go_neg_freq = freq;
5150
5151         if (!params->sel && role != P2P_GO_IN_A_GROUP) {
5152                 freq = p2p_channel_to_freq(p2p->cfg->reg_class,
5153                                            p2p->cfg->channel);
5154                 if (freq < 0) {
5155                         p2p_dbg(p2p, "Own listen channel not known");
5156                         return -1;
5157                 }
5158                 p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
5159                 dev->oob_go_neg_freq = freq;
5160         }
5161
5162         if (msg.group_id) {
5163                 os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
5164                 params->go_ssid_len = msg.group_id_len - ETH_ALEN;
5165                 os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
5166                           params->go_ssid_len);
5167         }
5168
5169         if (dev->flags & P2P_DEV_USER_REJECTED) {
5170                 p2p_dbg(p2p, "Do not report rejected device");
5171                 p2p_parse_free(&msg);
5172                 return 0;
5173         }
5174
5175         if (!(dev->flags & P2P_DEV_REPORTED)) {
5176                 p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
5177                                     !(dev->flags & P2P_DEV_REPORTED_ONCE));
5178                 dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
5179         }
5180         p2p_parse_free(&msg);
5181
5182         if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
5183                 params->next_step = BOTH_GO;
5184         else if (role == P2P_GO_IN_A_GROUP)
5185                 params->next_step = JOIN_GROUP;
5186         else if (role == P2P_CLIENT_IN_A_GROUP) {
5187                 dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
5188                 params->next_step = PEER_CLIENT;
5189         } else if (p2p->num_groups > 0)
5190                 params->next_step = AUTH_JOIN;
5191         else if (params->sel)
5192                 params->next_step = INIT_GO_NEG;
5193         else
5194                 params->next_step = RESP_GO_NEG;
5195
5196         return 0;
5197 }
5198
5199
5200 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
5201                                       int go_intent,
5202                                       const u8 *own_interface_addr)
5203 {
5204
5205         p2p->authorized_oob_dev_pw_id = dev_pw_id;
5206         if (dev_pw_id == 0) {
5207                 p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
5208                 return;
5209         }
5210
5211         p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
5212                 dev_pw_id);
5213
5214         p2p->go_intent = go_intent;
5215         os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
5216 }
5217
5218 #endif /* CONFIG_WPS_NFC */
5219
5220
5221 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
5222 {
5223         if (len < 8 || len > 63)
5224                 return -1;
5225         p2p->cfg->passphrase_len = len;
5226         return 0;
5227 }
5228
5229
5230 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
5231 {
5232         p2p->vendor_elem = vendor_elem;
5233 }
5234
5235
5236 void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx)
5237 {
5238         struct p2p_data *p2p = eloop_ctx;
5239
5240         p2p_dbg(p2p,
5241                 "Timeout on waiting peer to become ready for GO Negotiation");
5242         p2p_go_neg_failed(p2p, -1);
5243 }